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Additives 1991.


Air Products and Chemicals, Inc., has developed two new oligomeric diamine curatives that offer performance and processing benefits in adhesives, coatings, and molded parts applications. Polamine 650 and Polamine 2000 curatives can be combined with diisocyanates to form polyurea and polyurethane/urea polymers. These polymers are reported to be superior to conventional polyurethane because they can withstand higher temperatures and offer better abrasion resistance, lower linear shrinkage, and improved tear resistance. From a processing standpoint, the new products have advantages because they are nonfoaming, have a pot life of 1 to 45 min, and can be processed as liquids at room temperature.

In two-component adhesive systems, Polamine 650 and 2000 curatives are reportedly effective in adhering a variety of substrates, including polycarbonate, acrylic, ABS, and wood. In high solids, two-component coating systems, highly abrasion-resistant coatings can be formed. Molded part applications that can benefit from the new curatives include castable elastomers, tools, and encapsulated electronic components.

The Polamine curatives also can be used as a component of field repair kits for molded parts. The resultant elastomers can have a hardness of Shore 40A to 80D. Other applications include use as additives in shoe sole systems to improve abrasion and cut resistance, and in epoxies to enhance fracture toughness.

In January, the firm introduced a new catalyst - Dabco CS90 - for CFC-free and chlorinated solvent blown foams. By offering increased tin latitudes, the catalyst permits production of more open cell foams. Reportedly, it achieves up to 10% additional softening in "super soft" grades of foam; its balanced reactivity results in what is said to be excellent foam blowoff and greater control of the manufacturing process. In addition to providing high performance in "super soft" grades of trichloroethane-blown foams, the catalyst is said to be compatible with methylene chloride-blown foams and other grades of conventional foams. Air Products and Chemicals, Inc., Polyurethane Chemicals Division, 7201 Hamilton Blvd., Allentown, PA 18195-1501; (800) 345-3148; Fax (215) 481-4184.


In February, Ajinomoto U.S.A., Inc., introduced its Ajicure line of epoxy curing agents, which can be formulated as a single-component epoxy system with a shelf life of up to three months at 40 [Degrees] C. The agents permit cure times of approximately 1 hr at 100 [Degrees] C, and 30 min at 120 [Degrees] C. They also permit curing temperatures as low as 80 [Degrees] C, and, in a cured product, Tgs of up to 140 [Degree] C. Epoxies that have been cured with the agents are reported to display excellent moisture resistance and strength.

The Ajicure products can also be used as accelerators for epoxy/dicyandiamide and epoxy/acid anhydride systems. In comparison with conventional accelerators, they reportedly afford longer shelf life, reduced volatiles, and lower curing temperatures - while enhancing physical and thermal properties.

The firm has also introduced Yse-Cure, a line of curing agents based on a heterocyclic diamine (spiroacetal). Designed for two-component, room temperature cure systems, the line reportedly gives epoxies twice the toughness, flexibility, and thermal shock resistance of epoxies that have been cured with conventional aliphatic amines and polyamides. Formulations that incorporate Yse-Cure are said to offer outstanding weather-ability, clarity, and adhesion to wet surfaces, and a cold-temperature cure as low as 5 [deg.] C. Ajinomoto U.S.A., Inc., Specialty Chemicals Division, 500 Frank W. Burr Blvd., Teaneck, NJ 07666; (201) 488-1212.


In October 1990, Akzo Chemicals Inc. introduced nine new peroxides for vinyl chloride monomer (VCM) polymerization. The products include new peroxide suspensions that are based on a specialty low-sodium polymer colloid; peroxide emulsions that are more concentrated; and two highly active peroxides for high-K-value PVC.

Among the new suspensions is Perkadox 16-W40-GB5, a water-based organic peroxide suspension that aids the production of PVC by offering lower viscosity, less reactor fouling, and a narrower particle size distribution. PVC that is produced with the aid of the product is reportedly more porous and contains fewer fish eyes.

Various Trigonox curing agents for unsaturated polyesters have also been introduced, including 121-BB75, 161, and 239A.

In the April 1991 and July 1991 issues of PE, Victor Wigotsky reported on recent Akzo stabilizer introductions: Stanclere T-5507, T-197, T-883, and T-4815, and Interstab LT-4813, LT-4805R, and CZL-717. In the November 1990 issue, he discussed Akzo's commercialization of Fyrol PBR, a brominated flame retardant for flexible polyurethane foam. Akzo Chemicals Inc., P.O. Box 638, 500 Jersey Ave., New Brunswick, NJ 08903; (908) 247-2202; Fax (908) 247-2287.


Allied Color Industries, Inc., a business unit of M.A. Hanna Co., has recently introduced a line of heavy-metal-free dispersions for rotational molding; the firm says that pigment selection and formulation have been geared to produced maximum color value in the low shear rotational molding process. Also new is a line of granular dispersion concentrates for heavy-metal-free tinting of polyolefins; they are suggested as replacements for dry color when automatic feed systems are being used. A third new product is a line of polyolefin stearate concentrates for the injection blowmolding industry; also said to be well suited for automatic feed systems, they are formulated to provide uniform lubrication in the base resin. Allied Color Industries, Inc., 800 Ken Mar Industrial Pkwy., Cleveland, OH 44147; (800) 321-9320 or (216) 526-0230; Fax (216) 526-3183.


At NPE '91, American Cyanamid Co. introduced a new line of Cyasorb hindered amine light stabilizers, including three liquid products - Cyasorbs UV3581, UV3604, and UV3668. Because they vary in basicity, the stabilizers are said to be chemically compatible with a larger variety of plastics. In addition to providing light stabilization of polymers and coatings, they offer thermal antioxidant protection of plastic parts employed in high temperature service conditions. They can be used in ABS, polypropylene compounds, and weatherable alloys, and are reported to be especially effective in reducing yellowing and improving the retention of gloss. Product applications include outdoor furniture, automotive interior applications, and weatherable cap stocks that are used for outdoor spas. American Cyanamid Co., One Cyanamid Plaza, Wayne, NJ 07470; (201) 831-4512.


At NPE, Amoco Nisseki CLAF Inc. (ANCI) introduced CLAF fabric for the flexible packaging industry. The coextruded, fibrillated film is a lightweight, nonwoven reinforcement material that the company says enhances the strength and tear resistance of film and other flexible packaging materials without adding excessive bulk or weight. Amoco Nisseki CLAF Inc., (404) 956-2492.


Talc Polyethylene Concentrate 10799-A is an LLDPE-based concentrate that produces a matte finish on polyolefins. In coextruded two-sided film, the additive can be used to achieve a satinlike matte finish on one side and a slick surface on the other. The matte side can then be used for writing or printing on an almost paperlike surface. Concentrate 10799-A is reported to be compatible with virtually all of today's LLDPE, LLDPE/LDPE, and HDPE applications, including film and molding.

The company also is offering two new pearlescent OPP film concentrates, 40379 and 410032, for food packagers desiring pearlescent appearance and lower density OPP film. The 40379 is a 40% loaded calcium carbonate; the 410032, a highly dispersed 50% titanium dioxide loading in polypropylene. Ampacet's 110052 Ti[O.sub.2] Concentrate is intended for cast and blown film applications where a bright white with low abrasion is required. Originally developed for the photographic grade extrusion coating market, the product is also targeted for film designed to wrap major appliances and other fine finished metal parts. Ampacet Corp., 660 White Plains Rd., Tarrytown, NY 10591-5130; (914) 631-6600; Fax (914) 631-7197.


AC-32 is a dianhydride with the appearance of a resin that is recommended as a curing agent for epoxy resins in fluidized bed coatings, transfer molding compounds, powder coatings, electrical potting and encapsulation compounds, and room temperature-stable epoxy prepregs. Other applications inlcude polyester resins, alkyd resins, and polyimide lacquers. The manufacturer says it combines a low melting point with no fuming or sublimation, the excellent reactivity of an anhydride, easy grindability, the ability to blend with liquid anhydrides, and solubility in a wide variety of solvents.

AC-39 is a liquid anhydride that is said to impart a high degree of flexibility to epoxy resins, thereby providing excellent thermal shock properties to the cured product.

Imidazole accelerator AC-PI, a brown liquid soluble in methanol, ethanol, acetone, and toluene, is reported to be as effective as 2,4 EMI but much less expensive. Anhydrides and Chemicals Inc., 7-33 Amsterdam St., Newark, NJ 07105; (201) 465-0077; Fax (201) 465-7713.


Antimicrobial Product Sales Co. has developed antimicrobial additives that inhibit the growth of a wide variety of bacteria in film, sheet, molded and extruded products, and textiles. As surface concentrations of the antimicrobial agents are reduced through use or cleaning, they are replenished by the release of additional agents within the structure of the polymers. The result is continuous protection from germs, odor, mold, and mildew - reportedly for the lifespan of the product. Product applications include shower curtains, floor tiles, telephone components, combs, brushes, and footwear. Antimicrobial Product Sales Co., 3034 Trenwest Dr., Winston-Salem, NC 27103; (919) 760-0419.


Anzon continues to expand its Envirostrand or Fyrebloc lines of highly loaded, antimony oxide-based flame retardant/smoke suppressant concentrates. Microfine, a 0.3-micron particle size antimony oxide, is now available in either Envirostrand or Fyrebloc nondusting forms for improved handling and dispersion. It is said to help optimize tensile and impact properties and also improve electrical properties in thin-wall applications. An 85% active EPDM has been added to the Fyrebloc line. These compositions can be custom formulated to incorporate exact loadings of selected halogen sources. Ultracarb, a fine white powder of hydrated magnesium carbonate, is now available as an Envirostrand. It has a decomposition temperature about 50 [deg.] F higher than ATH and can be used in a variety of polymers.

Pyrobloc SAP 2 and SAP 5 flame retardants are inorganic antimony compounds that also have low opacity and tinting strength and low reactivity, important in sensitive polymers such as PET. Smokebloc AZ60 and AZ70 provide smoke suppression with reduced heat release and after-glow properties. Developed primarily for use in halogenated polymers such as PVC, they have also found use in other resins. Anzon Inc., 2545 Aramingo Ave., Philadelphia, PA 19125; (800) 523-0882.


Two liquid, sulfur-containing organotin PVC heat stabilizers for high-output extrusion rates have been introduced. Both Thermolite 139 and 380 are said to provide outstanding stability, superior weathering, and excellent color-hold properties in coextruded siding, window profiles, and other rigid applications. The low sulfur content/low odor stabilizers can be used in both substrate and top-coat formulations, eliminating the need for a second stabilizer. Thermolite 380 is recommended when low stabilizer concentrations are required. Atochem North America, Inc., 3 Parkway, Philadelphia, PA 19102; (800) 344-5808.


Avecor, Inc., recently introduced its XL Series liquid phase dispersions, which can be used for coloring a broad range of thermoplastic resins. The series is reported to feature controlled viscosity, which permits easy handling over a wide range of temperatures; improved uniform wetting properties; higher pigment loadings; and water miscibility. Extruded sheet, profile and pipe extrusions, injection molded parts, structural foam, and blow-molded bottles are among the applications.

The company has also introduced a new series of pelletized concentrates specifically designed for coloring a wide range of unplasticized PVC compounds. Available in all custom matched colors, including those designed for food and beverage contact, the concentrates are stabilized to meet 21 CFR 178.2650 food additive regulations.

In June, Avecor announced that as of November 1 of this year, the firm will no longer use heavy metal pigments in the formulation of color concentrates at its facility in North Kansas City, Mo. The firm plans to provide customers with a "quality audit report" that discloses specific analytical data and the generic chemistry of each formulation. Avecor also announced that its plants in Vonore, Tenn., Vancouver, Wash., and Los Angeles will discontinue their use of the heavy metal pigments "when industry and customer demands require such action." Avecor, Inc., Avecor Dr., Niles Ferry Industrial Park, Vonore, TN 37885; (615) 884-6625.


In December, Aztec Catalyst Catalyst Co. expanded its perester product line with the addition of T-Butyl Perneodecanoate, a low temperature initiator for the production of high-pressure LDPE. The firm says that it can custom produce the initiator, which is typically produced at an assay of 75%, to any assay specified by a customer. The product is reported to be extremely low in chlorides - which can adversely affect the production of polyethylene - and hydroperoxide, which can similarly affect polymer properties. In addition, the product is free of phosphorus contaminants that can cause corrosion to equipment during polymerization. Aztec Catalyst Co., 2190 North Loop West, Suite 400, Houston, Texas 77018; (713) 957-6832.


New Sicoplast powder colorants - including the 10-0290 and 19-0920 Yellows and the 36-0330, 32-1720, 37-0270, and 37-0280 Reds - are mixtures of organic and inorganic pigments adjusted to produce the final shades. According to the manufacturer, they can be used in virtually all thermoplastic applications, although testing in various plastics and processing methods is incomplete. After tests following DIN 53388, all colorants received the grade "outstanding" for lightfastness on the Blue Wool Scale described in DIN 54003. All satisfy German legislation regarding the content of acid-soluble heavy metals and aromatic amines for coloring food-contact packaging, toys, and so on. Yellow 10-0290 and Red 36-0330 are heat stable to 260 [degrees] C, the others to 300 [degrees] C. BASF Corp., 491 Columbia Ave., Holland, MI 49423; (616) 392-2391.


BP Chemicals recently added two new products to its Polybond line of chemical coupling and compatibilizing agents. Polybond 3005, a thermoplastic maleic anhydride modified polypropylene homopolymer, is stabilized for both processing and long term heat aging resistance. Reportedly, it can be processed on any conventional thermoplastic processing equipment, and at temperatures above 220 [degrees] C. Polybond 3009, a developmental product, is a thermoplastic HDPE modified with maleic anhydride. Reported to offer good adhesion to various substrates and excellent compatibility with fillers and reinforcing agents, the product is designed especially as a chemical coupling agent for glass and micareinforced polyethylene. It can also be used to render polymer alloys of polyethylene compatible with polar polymers such as polyamides, and reduces moisture sensitivity in such applications. BP Chemicals, BP Performance Polymers Inc., Newburg Rd., P.O. Box 400, Hackettstown, NJ 07840; (908) 852-1100 or (800) 526-4636; Fax (908) 850-7282.


Last November, The Burns & Russell Co. introduced a line of S/G F-40 and F-200 surface modified silica fillers that reportedly impart superior properties in specific thermosetting and thermoplastic products. The fillers offer a bifunctional surface chemistry that results in chemical coupling between the inorganic silica and an organic plastic; manufacturers can thus incorporate greater percentages of filler in their formulations without loss of physical properties. Impact and tensile strength, dart impact properties, flexural modulus, and resistance to heat, chemical attack, and dimensional variation are among the properties the fillers are said to enhance.

The fillers may be used alone or in combination with other fillers and additives. Applications include urethane flooring, polyester sanitary ware, roofing compositions, electrical boxes, and motor housings. The Burns & Russell Co., P.O. Box 6063, Baltimore, MD 21231; (301) 837-0720.


The company has introduced a new mold release agent, Camie 120, that contains hydrocarbon propellants, rather than chlorofluorocarbons (CFCs). An "all-purpose" silicone release agent, the product is said to be useful on almost all resins, including acrylics, cellulosics, ABS, polystyrenes, polyesters, and rubber. The company also says that it is developing a series of release agents that will offer the dry, very fine atomization offered by the old CFCs. Camie-Campbell, Inc., 9225 Watson Industrial Park, St. Louis, MO 63126; (800) 325-9572 or (314) 968-3222.


Fiberfrax 6900-70 and 6900-70S are commercial ceramic fibers designed for use as reinforcing fibers in polymer matrices. In composites, the fibers are reported to provide advantages over fiberglass that include superior retention of properties after exposure to elevated temperatures. They also provide dimensional stability, excellent wear resistance, and significantly less mold shrinkage.

Both Fiberfrax 6900-70 and 6900-70S are produced by a process that minimizes shot production, resulting in significantly more reinforcing fibers per pound. Compared with those reinforced with fiberglass, composites containing Fiberfrax fibers are said to offer improved moisture and corrosion resistance.

Fiberfrax 6900-70S was developed especially for use in phenolic, epoxy, nylon, melamine, and polyurethane systems; it is coated with surface treatments designed to increase dispersibility within the matrix and to ensure maximum bonding between the fiber and the polymer. The Carborundum Co., Carborundum Center, Niagara Falls, NY 14302; (716) 278-6375.


Certain Teed's Fiber Glass Reinforcement Division has been renamed Vetrotex Certain Teed. Four new fiberglass rovings have been introduced. The sizing chemistry of 21K gun roving is said to provide clean, crisp cutting and easy wet-out while allowing the roving to lie flat. It is recommended for applications requiring excellent mold conformity and fast wet-out/wet-through, such as skin coats and parts with sharp radii and intricate shapes. Chopped strand 994 is designed to be used in the extrusion compounding of nylon resins for injection molding. Its strand configuration and sizing are said to provide good mechanical properties and color retention, while the dry flow of the strands results in good flow at the extruder throat.

Product 238 SatinGlass is a continuous strand roving developed especially for low shrink, highly filled, low profile SMC. The company reports significant enhancement of SMC automotive body panels. Features ascribed to the roving include excellent chopped fiber dispersion, optimum wet-out/wet-through, minimal dry- and wet-sheet loft, very high sheet density, and minimum air entrapment.

Gun roving 255 was developed for use with corrosion resistant resins such as isophthalic polyesters and vinyl esters in applications requiring that property. Its silane-based sizing is said to provide excellent laminate clarity and mechanical properties along with even fiber dispersion, ease of roll-out, minimal fuzz and fly, and reduced static generation. Vetrotex Certain Teed Corp., P.O. Box 860, Valley Forge, PA 19482; (215) 341-7000.


In April, the Pigments Division of Ciba-Geigy Corp. announced the addition of five products to its list of pigments registered by the U.S. Food and Drug Administration (FDA) for food contact applications. The products - all in the Cromophtal line - include Red 3BRF (A2B); Red 3B (A3B); Red G; Yellow GR; and Orange GP. The firm says that it now provides 13 pigments registered by the FDA for food packaging materials and toys.

Cromophtal DPP Red BP, a new organic colorant for plastics, reportedly offers high opacity, high color saturation, and better weathering resistance than perylene or azo condensation pigments. The manufacturer says that the colorant is an outstanding replacement for cadmium, and recommends its use in polyolefins and vinyls. The product is also reported to be suitable for many styrene substrates.

In May, Ciba-Geigy announced the introduction of Chimassorb 119, a monomeric hindered amine light stabilizer (HALS) said to be particularly suitable for pigmented fiber and other color-critical polypropylene applications. Because of its outstanding extraction resistance and minimal influence on color, the stabilizer is especially effective in thin-section applications such as films and fibers. In fibers, it is also said to provide excellent resistance to gas fade and post extrusion treatments such as tentering. Also an effective stabilizer in thick-section pigmented systems, the product exhibits low color development in non-pigmented systems - an important characteristic for rotational molding applications.

Ciba-Geigy is now producing granular or free-flowing forms of its Irganox 1010 and Irganox 1076 antioxidant products. Compared with powder, the new product forms are reported to be easier to measure and to add to a process.

In addition, the firm is now offering several liquid light stabilizers. Tinuvin 571 and Tinuvin 213 are new liquid benzotriazole light stabilizers for PVC and polyurethane applications. Tinuvin 765 is a liquid HALS especially effective in styrenics, polyurethanes, and polyolefins.

Another new product - Tinuvin 123 - is reported to be the first of a class of hindered amine light stabilizers with low basicity, which reduces interaction between the stabilizer and other components of a polymer system (such as flame retardants). Said to be effective in stabilizing PVC and flame retardant materials, Liquid Tinuvin 123 can be added directly to the plasticizer in flexible PVC to improve incorporation during production. Ciba-Geigy Corp., Additives Division, Seven Skyline Dr., Hawthorne, NY 10532-2188; (914) 347-4700; Fax (914) 347-2202.


With the recent addition of the Hydrax line of alumina hydrates and magnesium hydroxide flame retardants/smoke suppressants to its molybdenum and zinc borates, the company claims to be the only manufacturer that offers the key char-forming and endothermic additives necessary to meet the reduced smoke, flammability, and heat release requirements of wire and cable, aerospace and mass transit, and building materials applications. An ultrafine zinc borate, ZB-467 LITE, has been introduced. It is targeted for wire and cable applications that require an average 1.5-micron particle size and close control of topsize. Polymer Additives Group, Climax Performance Materials Corp., 101 Merritt 7 Corporate Park, P.O. Box 5113, Norwalk, CT 06856-5113; (203) 845-2950; Fax (203) 845-2953.


The company has introduced a line of seven stock polycarbonate colors. When used at a 25:1 letdown ratio, the company says, the products can be used with a broad range of conventional PC molding resins. Colors for Plastics Inc., 2245 Pratt Blvd., Elk Grove Village, IL 60007; (800) 466-0625; Fax (708) 806-0787.


Cookson Pigments, Inc., has started production of three new lines of synthetic red, maroon, and magenta pigments at its new manufacturing facility in Newark, N.J. The insoluble pigments reportedly meet demanding requirements for opacity and heat stability; they also offer improved rheological properties that enhance dispersion. The reds and maroons are said to be brighter and the magentas, deeper.

Quinacridones (trade named Enduroquin) and perylenes (trade named Endurolene), for translucent or opaque materials, are now in production. The anthraquinone reds (trade named Enduronone) are suited for compounding solid red materials. Cookson Pigments, Inc., 256 Vanderpool St., Newark, NJ 07114; (201) 242-1800; Fax (201) 242-7274.


Cyprus Industrial Minerals has introduced Cimpact 700 and 710, two ultrafine talc products said to increase the stiffness, while maintaining impact strength, of high impact copolymers and TPOs. Both talcs can be used in automotive and tough appliance parts, and loadings of 5% to 30% are possible in polyolefins. Cimpact 700 has a median particle size of 1.4 micron, and Cimpact 710 of 1 micron. Neither contains asbestiform materials.

The products are said to reduce mold shrinkage and heat distortion; other benefits include improved brightness and less compounding discoloration because of superior color.

Stellar 400 and 410, two talcs that reportedly provide superior whiteness and reinforcement for polypropylene in appliances and packaging, and Aspect 606, a fiberglass extender in nylon 6/6 and PET, are among the company's other recently commercialized additives. Cyprus Industrial Minerals, Cyprus Technical Center, 8985 East Nichols, Suite 300, Englewood, CO 80112; (800) 325-0299; (303) 643-5000.


In March, Day-Glo Color Corp. announced the introduction of its ZQ Series fluorescent pigments and its high intensity fluorescent VC (vinyl colorant) pigments. The ZQ pigments, said to be particularly suited for polyolefins, are heat stable and require lower processing temperatures. Because they offer higher color strength and reduced mold plate-out, they reportedly require less pigment and permit longer uninterrupted production runs. The VC pigments consist of five fluorescent shades reported to provide exceptional brightness and intensity, and outstanding heat stability in PVC. According to Henning Bunge, the firm's marketing manager, they are designed for application in calendered, injection molded, and extruded vinyl.

In April, the firm announced the development of five NX pigments for polyethylene. The high strength pigments, particularly suited for blowmolding of bottles, promise to reduce blowpin plate-out. They are also said to show greater compatibility with olefins and permit easier, faster cleaning of extrusion machinery. A higher loading feature permits pigment loadings of up to 50%.. Day-Glo Color Corp., 4515 St. Clair Ave., Cleveland, OH 44103; (216) 391-7070. Fax (216) 391-7751.


Examples of the company's new flame retardant products are FR-513 (tribromoneopentyl alcohol), an intermediate used in the production of UV-stable flame retardant additives for polypropylene and also used in polyurethane foam; and FR-1034 (tetrabromodipentaerythritol), an aliphatic compound said to be highly effective in polypropylene because of its ultraviolet stability and contribution to tensile properties, and styrenics.

The new Actimer line of flame retardants is designed to be used as building blocks in the composition of FR resins - these reactive monomeric flame retardants are meant to be introduced into the polymeric matrix. Thus the products can be used by the resin producer as well as by the compounder to modify commercial resins, alloys, and blends; they are said to maintain favorable physical properties while meeting stringent flammability standards. Styrene-based monomer FR-803 (tribromostyrene) has been tested successfully, the company says, by major ABS producers as a comonomer in the production of their FR grades for highly demanding electronic applications. Acrylate-based brominated monomer FR-1025M can be compounded with PET, PBT, HIPS, PC, and styrenics. When extruded at temperatures exceeding 200 [degree C], the company says, it will polymerize, resulting in grafting or cross-linking in unsaturated systems on in a "built-in" nonblooming polymeric FR.

Further, the company is now offering the F-2000 series, flame retardants for engineering plastics and styrenics. These brominated epoxy oligomers have molecular weights ranging from 800 to more than 40,000; they are said to be nonblooming and to offer thermal and UV stability, high flame retardant efficiency, and favorable mechanical properties.

Finally, FR-20 is a new nonhalogen FR recommended where low smoke emission and high thermal stability are required. Special surface treated grades are available for polypropylene and elastomers. The product is said to be effective in both flexible and rigid PVC as both a stabilizer and a smoke suppressant. Dead Sea Bromine Group, Makleff House, P.O. Box 180, Beer Sheva 84101, Israel; Telephone 057-667222. In the United States, contact: Ameribrom Inc., in New York City, (212) 286-4000; Fax (212) 286-4475.


Last October, Deco-Coat Products Division announced the development of its RA-4000 and RA-4100 release agents. RA-4000, a non-CFC silicone mold release and lubricant, is formulated with a nonpaintable silicone fluid that reportedly provides excellent release with various substrates. RA-4100, a fast drying fluorocarbon release agent, promises excellent lubricity for injection molding - especially in applications that require clarity and deep draw. It is formulated with TFE Vydax and frictionless micronsize particles, and does not pick up dust or dirt.

Both products, in addition to being nonflammable, noncorrosive, and inert, can withstand temperatures up to 600 [degree F]. They also leave a thin film that permits reproduction of fine details. Epoxies, PS, PE, PP, and acrylics are among the materials for which they are suited. Deco-Coat Products Division, P.O. Box 508, Greenville, RI 02828; (401) 231-8211.


Late last year, Frekote Mold Release Products (a business unit of The Dexter Corp.) began introducing its water-based Aqualine mold releases. The line is the result of a major R&D effort begun several years ago in anticipation of growing pressure to remove volatile solvents from the workplace.

Reported benefits of the products include multiple releases, minimal mold buildup, high thermal stability, and absence of contaminating transfer in most molding processes. In addition, the products provide a low content (0.19 lb/gal) of volatile organic compound, no CFCs, and no chlorinated, aromatic, or petroleum-based solvents. Dexter Frekote, One Dexter Dr., Seabrook, NH 03874; (603) 474-5541; Fax (603) 474-5545.


The Thermoset Applications Group of Dow Plastics says that its Stature II static control additive provides inherent static control when added to polyurethane foams. The company says that in addition to its ease of processing and its minimal effect on the resulting foams' physical properties, Stature II is compatible with foam additives such as pigments and dyes, flame retardants, and copolymer polyols. Because the product is bonded to the foam, becoming part of the entire matrix, it cannot migrate and be removed by contact or evaporation, thereby providing a long service life. A wide range of foam grades, from low to high density, can be produced. Dow Plastics, Thermoset Applications, 2040 W.H. Dow Center, Midland, MI 48674; (800) 441-4DOW.


The Du Pont Co. recently developed a new titanium dioxide pigment, Ti-Pure R-103, that is said to resist discoloration of resin compounds and finished plastic products from UV light. The pigment, which also minimizes color changes that can accompany plastics processing, has a "blue undertone" that produces bright, clean whites in polystyrene, ABS, and other resins that have an inherent yellow color. Other reported benefits include high tinting strength, high loadings in masterbatch formulations, and improved dry flow.

Among the firm's other recent developments are Elvaloy HP resin modifiers. Besides offering nonmigration, the products provide better strength, low temperature impact, weatherability, and heat and chemical resistance than conventional Elvaloy grades. They also outperform conventional grades in processability, low temperature flexibility, and thermal, hydrolytic, and oxidative stability.

Elvaloy HP 4051 is a modifier that eliminates the trade-off between impact strength and melt flow that traditionally occurs in ABS technology. Addition of 6% to 7% of the modifier to an ABS resin can double the impact strength of the resin and increase its melt flow index by 18% to 36%, thus reducing molding cycle times. The modifier can also be used to upgrade recycled ABS. Du Pont Co., Wilmington, DE 19898; (800) 441-9442.


Eastman Chemical Products, Inc.'s PA 2208 is a glycerol monostearate that offers a variety of benefits to many new polypropylene copolymers. Among its reported advantages are long term antistat protection, mold release properties, and the capability to improve processing.

The firm's new HDPE waxes include Epolene E-20, said to provide faster pre-compounding of PVC dry blends while maintaining clarity in rigid PVC applications.

Late last year, the company also developed a new line of water-based Aquastab additive packages for polypropylene. Because they are designed to be added to the polymerization reactor, the products reportedly eliminate a step from the usual compounding process. Eastman Chemical Products, Inc., P.O. Box 511, Kingsport, TN 37662; (800) 327-8626.


ECC International Ltd. has developed the Polarite 420 series of mineral-based additives for obtaining low- and zero-shrink DMC and BMC moldings. The additives reportedly permit production of moldings with superior gloss and color development. Ease of dispersion gives moldings an even pigmentation, without color variations that ordinarily occur with the use of conventional low profile additives. All products in the series are manufactured in the form of free flowing beads that have a mean diameter of 80 microns.

The firm has also introduced two ultrafine ground natural calcium carbonates: Micro-White 15, available in dry or slurry form, and Micro-White 15 SAM, a hydrophobic product that has an organic coating. Micro-White 15 can be used in water- and solvent-based coatings, plastics compounds, sealants, and adhesives; Micro-White 15 SAM, in PVC pipe and conduit, flexible sheeting and molding compounds, filled polypropylene and polyethylene compounds, and wire and cable compounds. ECC International Ltd., 5775 Peachtree-Dunwoody Rd., N.E., Suite 200G, Atlanta, GA 30342; (404) 843-1551.


New products from the Pigment Division of EM Industries, Inc., include two white pigments, Afflair 119 Polar White and Afflair 123 Bright Lustre Satin. The 119 product promises exceptional hiding power and improved whiteness, said to be a combination never previously achieved in plastics. Both 119 and 123 have a particle size distribution of 5 to 20 u.

A new line of interference grade pigments have a particle size distribution of 10 to 125 u: Afflair 249 Flash Gold, 259 Flash Red, 289 Flash Blue, and 299 Flash Green. And a line of Afflair Lustre Pigments are mica-based pearlescent pigments used in laser coding; when exposed to lasers, the pigments act as receptors and cause resins to blacken into permanent, high contrast marks. The mark is actually in the resin, and is not just an alteration of the pigment. Common packaging materials that can be enhanced for laser marking include HDPE, LDPE, PP, and PS. EM Industries, Pigment Division, 5 Skyline Dr., Hawthorne, NY 10532; (914) 592-4660; Fax (914) 592-9469.


Last October, Engelhard Corp. announced the introduction of the Mindust line of low dust cadmium pigments, which reportedly reduce the potential for workplace exposure to airborne cadmium. In comparison with untreated cadmium pigments, the Mindust products, available in the firm's Harshaw Color Thermobrite pigment line, also provide equivalent color value and performance.

The firm has since introduced a new series of pigments that combines the low dusting of Mindust with low cadmium solubility, while providing the color value and performance of conventional cadmium pigments. The pigments were formulated to help users meet OSHA handling and EPA waste disposal requirements; the amount of soluble cadmium in them is said to be less than the statutory threshold (as determined by the U.S. EPA's Toxic Characteristic Leaching Procedure for characterizing hazardous waste) of 1 ppm.

Recently, the company developed new applications for its Translink kaolin-based reinforcements, which are now said to provide commodity plastics such as HDPE and polypropylene with the basic benefits that they provide nylon. The reinforcements increase overall toughness and durability of the plastic end product; they also offer excellent heat distortion temperature (HDT), flexural modulus, and tensile strength, while maintaining a high degree of impact strength. Engelhard Corp., Specialty Minerals and Colors Group, Menlo Park CN28, Edison, NJ 08818; (201) 321-5000; Fax (201) 321-0250.


Enichem has released Anox 20 AM, an amorphous modification of its Anox 20 antioxidant. The product is said to be exceptionally free flowing and nondusting in handling and feeding operations. It is low melting (it has a softening point of 50 [degrees] C) in comparison with crystalline modifications that melt at temperatures between 115 [degrees] C and 120 [degrees] C. Consequently, it can be diffused easily (and as a liquid) into low temperature processing plastics.

The firm has also introduced - in two grades of different molecular weights - Uvasil 299, a patented polymeric hindered amine light stabilizer (HALS). Both grades are available in three physical forms: liquid; free flowing, nondusting granules of 70% Uvasil 299 and 30% foamed silica; and free flowing, nondusting granules of 70% Uvasil 299 and 30% polypropylene. The product is reported to be exceptionally compatible with polypropylene and to have good compatibility with pigments. Enichem Synthesis, Via Medici del Vascello, 40/A, 20138 Milano, Italy; 2/520 39218; Fax 2/520 39450.


In October 1990, the Industrial Chemicals Division of Ethyl Corp. began semi-commercial production of its Ethanox 398 antioxidant, which the company says is the first fluorophosphonite secondary antioxidant. The nonhygroscopic additive reportedly eliminates handling and storage problems associated with other phosphites and phosphonites; its resistance to hydrolysis allows it to be used in water environments.

The manufacturer says that the antioxidant can be used during solution polymerization of rubbers and PVC. It can also be used with a phosphorus-containing stabilizer in waterborne systems. The high thermal stability of the additive helps prevent charring and "black specks" that often occur with the use of phosphites during extrusion. Ethyl also reports that the antioxidant performance of the product is not affected by gamma radiation.

Other recently developed additives include Ethanox 323 antioxidant, a bleaching and disproportionating agent for rosin and rosin-ester adhesive systems; Saytex 402, said to be an efficient general-purpose flame retardant for high impact polystyrene (HIPS); and BT-93, a low-bromide-level flame retardant for resistance to high UV radiation and bloom. Ethyl Corp., 451 Florida Blvd., Baton Rouge, LA 70801; (504) 388-7040.


In February, Exxon Chemical Co. added Exxelor PO 1015 to its family of Exxelor polymer modifiers. The product, a chemically modified, olefin-based polymer, was developed to improve the compatibility of polyolefin materials with engineering thermoplastics. It reportedly improves the compatibility of PP and polyamide, resulting in a finished compound that exhibits improved physical and thermal properties and lower moisture absorption. It also improves the physical and mechanical properties of glass reinforced and mineral filled olefinic compounds.

PO 1015 is said to permit, at addition levels between 5% and 8%, improved end-use performance. It is supplied in pellet form and can be added directly to a compound during dry blending. Typical end-use applications include automotive interior trim, small appliances, electronics, and sports and leisure products. Exxon Chemical Co., Polymers Group, P.O. Box 3272, Houston, TX 77253-3272; (713) 870-6346.


Pyro-Chek LM brominated polystyrene flame retardant is the latest addition to Ferro Corp.'s line of Pyro-Chek flame retardants. When formulated with antimony oxide or other synergists, the new products results in a melt blendable, non-blooming flame retardant that exhibits high thermal stability. It is said to be especially effective in styrenics resins, including ABS formulations. Ferro Corp., Chemicals Group, 7050 Krick Rd., Bedford, OH 44146; (216) 641-8580; Fax (216) 439-7625.

Late last year, the company introduced six new nickel and chrome titanate yellow pigments that are replacements for cadmium and lead bearing colors. Among the firm's other recently developed additives are high strength black pigments for weatherable applications, a line of ultramarine pigments that includes a high strength reflecting black, and a range of blue, green, brown, and black inorganic pigments.

Earlier this year, the company's Plastic Colorants & Dispersions Division introduced a microprocessor-controlled liquid colorant metering pump. The pump features a memory capacity for retaining setup through power cycles; it also has a "jog" capability that permits fine tuning of setups during operation.

The division also offers the Spectraflo liquid colorant system, which is designed for use in injection molding, blowmolding, and extrusion. The system reportedly permits the metering (through a single metering adjustment) of either the liquid color, or multifunctional colorant and additive systems. On-line introduction of colorants eliminates preblending and facilitates the automatic feeding of natural resin directly to the equipment.

The system is compatible with a broad range of thermoplastics, including PE, PP, PS, ABS, PVC, nylon, and PET. It is also designed to accommodate, in conjunction with the firm's colorants, a number of processing additives - such as chemical blowing agents, antioxidants, UV absorbers, and release agents. Ferro Corp., Plastic Colorants & Dispersions Division, 1425 S. Wright Blvd., Schaumburg, IL 60193; (708) 980-9707; Fax (708) 980-0496.


Late last year, GE Specialty Chemicals added weatherable modifiers to its line of Blendex Modifier Resins. Blendex 975 is a weatherable modifier for rigid polymer applications that require good resistance to outdoor aging. Reported to provide excellent thermal stability, it can be alloyed with PVC to function as a protective film for screening UV radiation from less stable polymers. It is also said to improve impact strength. The firm also offers Blendex 977, a modifier that combines Blendex 975 with a UV inhibitor to provide increased levels of UV resistance.

The firm says that its Blendex 424 Modifier Resin has new applications in clear PVC packaging. An ABS modifier, Blendex 424 enhances the printability of PVC and provides high transparency, low crease whitening, and toughness. Its suggested uses include extruded and calendered sheet applications that require clarity, toughness, and favorable vacuum formability.

The company's well-known Ultranox 626 phosphite antioxidant is now being evaluated for use in the polyester packaging market. Said to be capable of protecting color and physical properties in polyester applications, the product can also be used to minimize the buildup of acetylaldehyde, which contributes to taste and color in PET bottles. It helps prevent degradation by minimizing intrinsic viscosity (I.V.) drop and improving molecular weight retention. GE Specialty Chemicals, Parkersburg Center, Fifth and Avery Streets, Parkersburg, WV 26102; (304) 424-5411; Fax (304) 424-5871.


Earlier this year, George Mann & Co. introduced Aqualease 6101 and 6102, two water-based release agents reported to be environmentally safe. Both are concentrated blends of silicone resins and oils in a water emulsion.

Aqualease 6101, designed for use with thermoset resins such as urethane elastomers, epoxies, polyester, and vinyl ester polymers, reduces surface defects commonly caused by bubbling or formation of surface film. It can be used to release castings from aluminum, steel, epoxy, and urethane mold surfaces. Aqualease 6102, said to reduce corrosion on steel molds, is also designed for use with thermoset resins; it reportedly provides excellent release and better film formation than previous water-based products. Because both products are solvent-free, they eliminate the need for expensive ventilation systems.

The firm recently introduced an aerosol spray applicator designed for use with the Aqualease mold releases. The AeroSprayer system uses compressed air to propel fluids; it contains no CFCs or other environmentally harmful propellants. The applicator consists of a quartsized container that is easily recharged with a standard foot pump. George Mann & Co., Inc., Formulated Products Division, P.O. Box 9066, Providence, RI 02940; (401) 461-2430; Fax (401) 941-0830.


The Emery Group has introduced two black polymeric plasticizers. Plastolein 9785 is a general-purpose product that is suited for wire and cable applications or any other use in which permanence is required without light color. Plastolein 9087 is a diester that exhibits the improved low temperature and volatility characteristics of a previous product, 9058, but at lower cost.

The company also reports that its Loxiol line of costabilizing lubricant systems, which has been commercial for a couple of years, has had very favorable market acceptance in rigid PVC compounds. Henkel Corp., 300 Brookside Ave., Ambler, PA 19002; (215) 628-1477 or (800) 654-7588; Fax (215) 628-1155.


Henley Chemicals, Inc., has commercialized an endothermic chemical blowing agent/nucleant for foaming of thermoplastics in injection molding and extrusion. Hydrocerol HK, for foaming of polyphenylene oxide, polyphenylene ether, and other high processing temperature resins, reportedly produces finer, more uniform cells than other blowing agents currently available.

The blowing agent permits up to 30% faster cycle time, produces less outgassing, and causes no discoloration, the manufacturer reports. It is acceptable under U.S. FDA regulations.

Two grades are available: Hydrocerol HK blowing agent is a white, free flowing powder with excellent storage stability when kept in a cool, dry place; Hydrocerol HK 70 blowing agent is a highly loaded (70%) concentrate supplied as white cylindrical granules.

Hydrocerol LC, a liquid endothermic blowing agent, is now available in a pelletized masterbatch form. Henley Chemicals, Inc., 50 Chestnut Ridge Rd., Montvale, NJ 07645; (800) 635-3588 or (201) 307-0422; Fax (201) 307-0424.


At NPE |91, Himont Specialty Chemicals unveiled its Xantrix Additive Delivery System (ADS) for polyolefins. The system incorporates, in ratios up to 30%, liquid/low-melting additives into a polypropylene base resin that provides uniform dispersibility at high letdown ratios. A broad range of additive concentrates - including peroxides and silicone oils - can be incorporated in the dry, free flowing sphere, which is said to be safer and easier to handle than liquid additives.

The system also reportedly eliminates quality variations and productivity losses that result from screw slippage when liquid additives are used at moderate loadings of between 5% and 7%. Because the system is reactor-produced, it lacks exposure to the high processing temperatures used to produce concentrates by extrusion compounding. As a result, the concentrates have a lower melting point and crystallinity, which aid additive dispersion. Himont Specialty Chemicals, P.O. Box 15439, Wilmington, DE 19850-5439; (302) 996-5865.


The Hitox Corp. of America has added two smaller particle size grades to its Bartex barium sulfate and Haltex alumina trihydrate lines of fillers. Bartex 10, of 1-micron average particle size, is a high purity, inert product intended for use as a filler/extender in thermoplastics, polyester, flexible PVC, and adhesives. Three natural, unbleached, high brightness grades are available. Haltex 304, the most finely ground of the company's Haltex grades, adds smoke suppressive and flame retardant qualities to flexible plastic products, including wire and cable compounds. Available in several grades differentiated by particle size, Haltex products are used in LDPE, polyester, FRP, PVC, phenolic, and epoxy resins. Hiltox Corp. of America, P.O. Box 2544, Corpus Christi, TX 78403; (512) 882-5175; Fax (512) 882-6948.


At this year's NPE, the Hoechst Celanese Specialty Chemicals Group unveiled its Hostastat HS-1 sodium alkyl sulfonate - said to be the first antistatic additive cleared by the FDA for use in polystyrene and styrene copolymer food packaging applications. The additive is designed to prevent styrenic products from clinging together and to reduce their affinity for attracting dust; it also acts as a processing aid by enhancing melt flow and reducing melt temperatures and pressures.

The product, which the FDA has deemed safe in concentrations of up to 3.0% in polystyrene and styrenic polymers that come in contact with food, is also reported to enhance the compatibility of styrenic alloys. Suited for the manufacture of containers for food products such as yogurt and sour cream, it is also used for refrigeration equipment, tape cassettes, and other applications for which FDA clearance may be desirable.

Also at NPE, the firm introduced Exolit IFR-23, the latest addition to its line of Exolit IFR nonhalogenated flame retardants for thermoplastics that process at 240 [degree C] or less. The intumescent flame retardant minimizes smoke generation and emits no corrosive gases; when exposed to flame, a material that has been treated with the product swells into an insulative foam char that protects the polymer matrix, cuts off the oxygen supply, and prevents dripping.

Products in the Exolit IFR line feature loadings between 25 and 35 wt%, and achieve a UL 94V-0 rating at 1/16 inch. They also include Exolit IFR-10 and IFR-21 for olefins, EVA, and elastomers; IFR-11 for polypropylene; IFR-12 for glass filled olefinics; and IFR-15 for polyether-based thermoplastic urethanes.

Among the firm's other new product introductions are Hordaflam NK 72, a solid chlorinated paraffin flame retardant said to be especially effective in polystyrene, and the following Hostastat Systems: E 1956, a laurylamide-based antistat for LDPE, HDPE, and PP; E 3952, an antistat concentrate for use in PS, HIPS, and styrene copolymer parts; E 3954, an antistat concentrate similar to E 3952, but of a different concentration; E 5951, an antistat concentrate for polypropylene; and 6952, similar to E 5951 but designed for use in LDPE, LLDPE, and HDPE. Specialty Chemicals Group, Hoechst Celanese Corp., Building 5200, 77 Center Dr., P.O. Box 1026, Charlotte, NC 28201-1026; (704) 559-6000.


The Plastics Additives Group of Huls America Inc. offers three new high performance plasticizers for PVC. Nuoplaz 6534, a benzoate plasticizer with low volatility and excellent fusion, is reported to provide unusually good stain resistance to vinyl floor and wall coverings. Admex 1723, a medium-low molecular weight polymeric adipate plasticizer, provides excellent permanence and weatherability to vinyls in outdoor uses such as single-ply roofing.

Another medium-low molecular weight polymeric adipate plasticizer, Admex 2632, may be used for food contact applications in which plasticizer migration is a problem. The additive may also be used in medical devices that contact other polymers, and in eliminating stress cracking that results from the migration of monomeric plasticizers in flexible vinyl to neighboring polymers.

Last fall, the company introduced a series of waterborne organofunctional silanes that contain no volatile carriers or by-products. The water-reducible Hydrosil silanes, which eliminate the use of organic solvents, are nonflammable products that promote safety and ease of mixing. They can be used as additives to increase the strength of filled or reinforced plastics, or to enhance the adhesion of sealants. Huls America Inc., Turner Pl., P.O. Box 365, Piscataway, NJ 08855-0365; (201) 981-5043.


Topanex 100BT benzotriazole, an ultraviolet light absorber (UVA) introduced last year by ICI Specialty Chemicals, protects plastics against discoloration and degradation. According to the manufacturer, the product absorbs light energy over a wavelength range of 290 to 380 nm. It exhibits good thermal stability, imparts little or no color, and has good retention characteristics in a variety of polymers. Reported to be especially effective in PVC, the product also is functional in styrenics, acrylics, and unsaturated polyesters.

Topanol LVT 600 antioxidant is designed for easy incorporation into polyolefin, styrenic, and engineering polymer processes. LVT 11, an antioxidant/plasticizer solution, is targeted at automotive applications and vinyl applications in wire and cable. ICI Specialty Chemicals, Wilmington, DE 19897; (302) 575-4885; Fax (302) 886-1309.

Late last year, the firm's Polymer Additives unit introduced Clarifex, a patented clarifying agent for polyolefins reported to significantly improve thermal process stability. The additive, which can be processed at temperatures up to 550 [degree F], is said to effectively reduce haze and increase clarity in PP homopolymers, ethylene-propylene copolymers, and LLDPE. ICI Polymer Additives, Wilmington, DE 19897; (302) 886-3021; Fax (302) 886-1309.

Last October, the PDI unit of ICI Polymer Additives introduced its PDI Type 35 series colorants for RIM automotive applications. According to the firm, the colorants are composed of high quality pigments dispersed in a high molecular weight polyether polyol. In addition to having excellent heat stability and lightfastness, they promise outstanding compatibility in existing RIM systems.

Products in the series are said to include currently popular colors for automotive interiors. The firm says, however, that it may apply its technology to a full spectrum of organic, inorganic, and HMF pigments. The firm offers custom color matching for all RIM products, including microcellular urethane, flexible and rigid foams, and urethane coatings.

Earlier this year, the firm introduced its new line of fluorescent color dispersions - PDI Type 97 Fluorescents - for polyester and epoxy resins. The encapsulated colors, dispersed in a nonreactive vehicle that is compatible with both unsaturated polyester and epoxy resin, are 100% solids and contain no plasticizers. They are said to be suited for reinforced processes, such as compression molding, injection molding, and pultrusion. The firm reports that incorporation of UV light stabilizers into the dispersions can dramatically increase fade resistance. ICI Polymer Additives, PDI Unit, 54 Kellogg Court, Edison, NJ 08817; (908) 287-1930.


In the July 1991 PE, Victor Wigotsky reported that development of new carriers, special grades for high temperature resins, and an emphasis on the foaming of recycled resins are among the current activities involving Activex endothermic chemical foaming agents. The enhanced performance of the product, which is offered as either 100% active fine powder or 25% active concentrates in a variety of resin carriers, is attributed to its highly controlled gas evolution in both extrusion and injection molding. The company also says that control of gas evolution makes the product suitable for blowmolded designs that previously could not be foamed. J.M. Huber Corp., Chemicals Division, P.O. Box 310, Havre de Grace, MD 21078; (301) 939-3500; Fax (301) 939-9216.


Late last year, Keystone Aniline Corp. introduced its PolyFast Dye for polyolefins. The vivid, nonbleeding dye is intended for both rigid and nonrigid plastics applications. Besides providing a comprehensive range of vibrant, transparent colors, it is strong, heat resistant, and lightfast. It is also said to offer excellent consistency and reliability. Keystone Aniline Corp., 2501 W. Fulton St., Chicago, IL 60612; (312) 666-2015.


UltraFine II Antimony Oxide, a specialty flame retardant for thermoplastics, thermosets, and synthetic fibers, is reported to be ideally suited for applications that require minimum loss of physical properties. Benefits of the additive, which has an average particle size of 0.2 to 0.4 microns, include reduced plugging of filters and spinerettes; the product also reduces the tendency of antimony oxide to settle during storage before curing.

According to the manufacturer, the use of UltraFine II and a melt blendable flame retardant or reactive flame retardant can significantly limit the loss of impact strength. In addition to its role as a flame retardant, the additive may be used as a transesterification catalyst in the manufacture of PET.

FireShield PP 80H, an antimony trioxide-polypropylene pellet concentrate containing 80% FireShield High Tint "H" antimony trioxide and 20% polypropylene, is intended for use in flame retardant polypropylene systems. It is reported to provide excellent dispersibility, elimination of dust, and ease of handling. The same benefits are attributed to FireShield EVA85H, an antimony trioxide-ethylene vinyl acetate pellet concentrate containing 85% FireShield High Tint "H" antimony trioxide and 15% EVA. EVA85H is intended for use in PBT, nylon, polypropylene, HDPE, LDPE, TPE, PVC, and ABS flame retardant systems.

Among the firm's other recently commercialized additives are the EEA75UF and PP70UF FireShield Concentrates, both of which reportedly enhance physical properties of polymers when substituted for other antimony oxides of one micron or larger; FireShield Petcats R9 and R9 UF, which are used as catalysts for polymerization of PET and production of acrylonitrile catalyst and other organic specialties; FireShield TP2 Colloidal Antimony Oxide, for applications that require a finely divided form of solid antimony oxide; and FireShield TPL Antimony Oxide Colloidal Liquid, for use in adding finely divided antimony oxide to fibers or plastics formed by an aqueous or polar organic solvent processing step. Laurel Industries, Inc., 30000 Chagrin Blvd., Cleveland, OH 44124-5794; (800) 221-1304 or (216) 831-5747; Fax (216) 831-8479.


Glycolube SG-1 and SG-2 lubricants are used in rigid PVC siding and profile extrusion compounds. The manufacturer says that the products "outperform" conventional lubricant systems by increasing heat stability, decreasing compound melt viscosity, and increasing rates of extrusion output without adversely affecting other performance properties.

Glycolube PS, recommended for use in rigid PVC, is said to be an effective external lubricant. As the loading of Glycolube PS increases from 0.25 to 1.0 phr, compound fusion times reportedly increase rapidly from 2.3 to 6.2 min; at a loading of 2.0 phr, the compound does not fuse during the 15-minute test. The product, which increases compound stability and mill stick times, is also being used increasingly as a mold release agent in engineering thermoplastics. Lonza Inc., 17-17 Route 208, Fair Lawn, NJ 07410; (201) 794-2400; Fax (201) 794-2597.


The Mearl Corp. recently introduced its Exterior Mearlin Red-Russet and Blue-Russet nonmetallic luster pigments. Both grades consist of iron oxide-coated mica; they have a patented surface treatment reported to provide excellent long term weatherability. Both are nonreactive powders said to be environmentally safe - nontoxic, nonarcing, nontarnishing, and nonconductive.

Other grades introduced within the last year are the Mearlin Inca Gold and Mearlin Sunset Gold metallic-like gold pearlescent luster pigments, both of which consist of iron oxide coated mica. The pigments can be incorporated into most plastics, surface coatings, and printings inks. The Mearl Corp., 41 East 42nd Street, New York, NY 10017; (212) 573-8500; Fax (212) 557-0495.


Advantage colorants are a new line of heavy-metal-free opaque colorants for polypropylene and polyethylene. The company says these color concentrates all process the same and have no effect on shrinkage or nucleation, making them ideal for tight tolerance parts such as closures and lids. Advantage colorants are also said to increase efficiency by substantially reducing molding-cycle and color changeover times.

The entire line of ClearTint colorants for polyolefins is now commercial. Because these concentrates are polymeric, according to the manufacturer, they combine the clarity and aesthetics of dyes with the nonmigrating properties of pigments, and also offer processing advantages. Milliken Chemical, Division of Milliken & Co., P.O. Box 1927, 920 Milliken Rd., Spartanburg, SC 29304; (803) 573-2200; Fax (803) 573-2430.


Mobay Corp.'s Bayferrox 915 is a yellow iron oxide pigment, the particles of which have a spheroidal shape that reportedly helps the pigment avoid the high oil absorption typical of most yellow pigments. According to the manufacturer, the pigment has higher color acceptance - particularly when used with red and black pigments that have spheroidally shaped particles. Yellow pigments, which regularly have an acicular (needle-like) shape, have traditionally been prone to separation and layering when mixed with spheroidal pigments.

The firm's Bayferrox PK 5086 is a zinc ferrite pigment that promises higher heat resistance than other zinc ferrites. Intended for applications in which zinc ferrites are not heat stable, it is said to provide favorable chemical resistance, lightfastness, weather stability, and hiding power.

Palomar Blue B-4710 pigment, a general-purpose, 15:1 pigment, is reported to be stronger and redder than the company's Palomar Blue B-4708. Mobay says it has excellent heat stability and can be used in most thermoplastics.

Macrolex Yellow R dye, a red shade yellow dye that was withdrawn shortly after its introduction in early 1990, has been reinstated as Solvent Yellow 130. It offers high strength and heat stability, and is recommended for use in engineering thermoplastics such as ABS, nylon, and polycarbonate. Mobay Corp., Mobay Rd., Pittsburgh, PA 15205-9741; (412) 777-2495 or (412) 777-2497; Fax (412) 777-2447.


Morton International, Inc., has a new nonmetallic isothiazolone-based biocide that reportedly offers good mildew resistance in PVC, polyurethane, and other polymeric compositions requiring fungal protection. The product - Vinyzene IT-3000 DIDP - is supplied as a 4% active concentrate in DIDP, and is easily introduced into the polymer matrix during the manufacturing process. It reportedly will not discolor or detract from the chemical or physical properties of the protected product. The manufacturer recommends its use with vinyl film and sheeting, extruded profiles, plastisols, and fabric coatings.

Another isothiazolone-based antimicrobial is Vinyzene IT-3020 DOP, said to offer the highest concentration of isothiazolone (a 20% level of active ingredient) currently available. The additive provides long term preservation against fungal attack and helps prevent surface growth, permanent staining, and embritlement. It can be used for a wide range of vinyl film and sheeting applications, such as wall covering, flooring, handbags, and marine upholstery.

Vinyzene SB-1 U, an antimicrobial for thermoplastic polyurethane, is the latest in a series of Vinyzene biocides based on 10,10'-oxybisphenoxarsine (OBPA). Low levels of the additive reportedly provide excellent preservation against fungal and bacterial degradation for products subject to long term outdoor exposure.

Advastab TM-404 is a food-grade heat stabilizer designed for PVC and PVC copolymer applications that require low stabilizer odor. The product meets U.S. FDA standards for methyltin heat stabilizers used in indirect food contact applications, the manufacturer reports. Besides providing low odor, it offers enhanced early and mid-range color hold.

The firm recently announced that it has acquired the exclusive right to market Dow Corning's 5700 Antimicrobial Agent for carpet fibers. Morton will promote the product, previously marketed as Sylgard, under the trade name Durotex QST. The agent is reported to offer durable wash-resistant protection of carpet fiber from mold, mildew, and bacterial attack. Morton International, Inc., 150 Andover St., Danvers, MA 01923; (508) 750-9416.


G-RRIM Wollastokup 20471 is a high-aspect ratio, special grade wollastonite that is chemically surface modified for nylon-RRIM. The product is reported to provide hydrolytic stability superior to that of glass reinforcements; it is suited to polyurea reinforced reaction injection molding applications that require fast wetting and dispersion.

Product 325 Wollastokup 10734 is a 325 mesh grade wollastonite, chemically surface modified for improved wet-out and dispersion by the matrix resin, reduced composite water sensitivity, and upgraded mechanical and physical properties. Recent application areas are polyolefins and nylon 6 and 6/6. NYCO Minerals, Inc., Willsboro, NY 12996-0368; (518) 963-4262; Fax (518) 963-4187.


Dechlorane Plus H is a new flame retardant recommended for use in HIPS for applications such as computer and television housings. A basic HIPS formulation of 18% Plus H, 4% antimony oxide, and 1% SFR-100 can produce a UL 94V-0 rating at 1/8- and 1/16-in thicknesses with a notched Izod value of 1.88 ft-lb/in, and offers better UV aging than brominated flame retardants.

A new series of formulations for ABS uses Dechlorane Plus flame retardants and 1% to 5% of proprietary additives. They meet UL 94V-0, have notched Izod values up to 4 ft-lb/in, and promise excellent UV stability - after one week's accelerated weathering without UV stabilizers, some formulations showed only a 0.2 change in yellowness index. Occidental Chemical Corp., Specialty Products Division, 5005 LBJ Freeway, P.O. Box 809050, Dallas, TX 75244; (800) 752-5151.


Omacide P-10 dispersions are a series of nonarsenical antimicrobial products specifically formulated for plasticized, flexible PVC products such as flooring and shower curtains. The bactericide-fungicides are dispersions of the active ingredient, Zinc Omadine, in plasticizers such as BBP, DOP, DIDP, 711, and epoxidized soybean oil. The manufacturer says the products have low toxicity and low use levels, are compatible with PVC formulation components, and are stable under most PVC processing conditions. Olin Chemicals, 120 Long Ridge Rd., Stamford CT 06904-1355; (203) 356-2000.


A host of new application-specific glass fiber reinforcements have been introduced. Product 183E, a 3/16-in chopped strand, was developed for color-critical PBT applications. It is produced by modifying the sizing on the successful 408 fiber; PBT molders report obtaining much whiter composites than with 408 but with similar properties. Product 158, an epoxy-compatible Type 30 roving for filament winding operations, is said to have shown improvement in cycles to weep data, burst strength, and process-ability over the industry standard 346 Type 30 roving. Applications include pressurized pipes such as small diameter oil field pipe, down hole tubing, chemical processing pipe, and service station line pipes.

Developed with the Budd Co., 973 roving for structural SMC containing 30% to 50% glass has a new sizing that minimizes "squeeze out" along the edges and permits better wet-through. This results in better processing and increased line speeds with less fuzz and fly than O-C's 473 roving, and with equivalent properties.

Enhanced preforming and molding characteristics said to be offered by M8650 preformable continuous strand mat for RTM and SRIM transportation applications include lower preforming pressure and preform heat input; improved heat stability of finished preforms; tighter mat surfaces; lower back pressure during resin pumping; and improved part fill-out with filled resin.

Innovative sizing chemistry and manufacturing improvements have made 357B gun roving the best gun roving, according to the company, for spray-up applications. It is said to offer fast wet-out/wet-through, improved choppability and dispersion, strand chemistry for both filled and unfilled systems, low blade wear, and low catenary.

Product 992BB roving for clear and translucent panels has 16% better weatherability than other rovings, according to the company's 24-hr water boil tests. Its benefits include a wide range of wet-out speeds for various systems, and the ability to match the roving with the resin/filler system.

Product 101C, an enhanced chopped strand fiber for BMC, is said to offer a higher level of performance than any other BMC fiber. When coupled with the company's new injection molding technology, 101C reportedly increases impact strength of BMC parts 25% to 50%, tensile strength more than 15%, and flexural strength more than 10%.

Now available in trial quantities, M8644 is the first phenolic-compatible continuous strand mat for pultruded parts designed to meet new stringent federal and state regulations for fire, smoke, and toxicity.

New applications include 495 roving in Kemlite Co.'s "Envision" FRP panels, the first decorative fiberglass wall panels with a Class A fire rating; and S-2 Glass fiber for Comdyne I filament wound compressed natural gas tanks (CNG) for buses. The tanks offer impact, abrasion, and corrosion resistance at half the weight of a steel pressure vessel, allowing a bus to store enough CNG to have a 600-mile range.

Owens-Corning has enhanced its products for two long-glass-fiber composites: ICI's Verton nylon 6/6 composite with a 60% glass loading, said by ICI to be the strongest and stiffest injection moldable thermoplastic; and Exxon Chemical Co.'s Taffen 200 series of stampable polypropylene sheet for automotive applications. Owens-Corning Fiberglas Corp., Fiberglas Tower, Toledo, OH 43659; (419) 248-8000; Fax (419) 248-7674.


Patco Polymer Additives Division, American Ingredients Co., recently introduced its Pationic 1250 acid neutralizer/catalyst scavenger for virgin and recycled polypropylene, LLDPE, and HDPE. Based on lactate chemistry, the additive works with commonly used antioxidant and secondary stabilization packages to reduce yellowing and improve process control by stabilizing melt flow over a wide temperature range. By achieving complete neutralization of residual acidic catalyst, it reportedly minimizes corrosion of screws, barrels, dies, and mold surfaces. The manufacturer recommends addition of the product to virgin polyolefins in place of traditional metallic stearates and inorganic neutralizers. Patco Polymer Additives Division, American Ingredients Co., 3947 Broadway, Kansas City, MO 64111; (800) 821-2250; Fax (816) 561-2250.


Prosil 2020 is a new organofunctional silane coupling agent designed for use in glass- or mica-filled polypropylene and HDPE composites. In independent tests on polyolefin composites, the product demonstrated significantly improved flexural and tensile strengths, elongation, and higher heat distortion temperatures when compared to other commercial coupling agents. Prosil 2020 is recommended for a variety of markets including automotive and appliances. PCR Inc., 8570 Phillips Hwy., Suite 101, Jacksonville, FL 32256; (904) 730-7511; Fax (904) 730-6164.


Percy Harms Corp. has reformulated its Slide Universal silicone and polycarbonate mold releases, now said to be CFC-free and chlorine-free. The mold releases are reported to perform better than their previous CFC formulations; they also are nonflammable, nontoxic, and safe on any plastics.

Slide Universal is nonsilicone, fully paintable, food approved, and approved for medical products. It is odorless and biodegradable, and is suited for applications in which parts must be painted, hot stamped, or metalized.

Slide Silicone, approved for food machinery, is heat stable and nonstaining. According to the company, it is effective for all molding operations and can save up to 40% in actual production.

Slide Polycarbonate is said to be ideal where parts are to be painted, hot stamped, or metalized. It eliminates crazing, blemishing, or poor surface finish.

The company has also reformulated its Slide Dura Kote semipermanent mold release, which now has no CFCs and no methylene chloride.

To satisfy the requirements of molded parts and components in electronic/electrical applications, the company developed its CFC-free Slide Electronic Mold Release. Reportedly, the product will not alter or interfere with electronic properties of molded plastic parts. Besides containing no silicones, it is fully paintable and safe for use on all plastics, including polycarbonates. Percy Harms Corp., P.O. Box 156, Wheeling, IL 60090; (800) 323-6433 or (708) 541-7220; Fax (708) 541-7986.


A new line of Plastisperse colorants is designed for maximum pigment dispersion in TPEs. The colorants have high pigment loadings - typical pigment and additive loadings are 75% to 90% - are low dusting and free flowing, and can be formulated with other additives. Because they are melt index independent, a single formulation can be used with different TPE hardness grades. Plastisperse can replace dry color, freeze dried or color concentrates, and are claimed to improve handling and housekeeping while also being economical.

Plastisperse PS-02052 is a free flowing, low dusting, granular black for use in BMC. Because the product combines high pigment loading with minimal carrier vehicle, significant cost and product benefits are claimed. The company's tests show that a 10% deeper black is achieved with PS-02052 at the same cost as standard paste dispersions and with minimal effect on physical properties. Plasticolors, Inc., 2600 Michigan Ave., P.O. Box 816, Ashtabula, OH 44004; (216) 997-5137; Fax (216) 992-3613.


Two types of highly loaded (80% pigment) white concentrates have been developed that promise good dispersion, equivalent opacity, and cost savings. The 80% Ti[O.sub.2] type can be used at lower percentages than 50% concentrates to yield an equal amount of Ti[O.sub.2]. It provides equivalent dispersions and opacities, resulting in cost savings. A second type, a mixture with other pigments, can be used at the same letdown ratio as 50% concentrates. The company says that using these resins offers the advantage of providing the same whiteness with less carrier resin added. Polycom Huntsman Inc., 90 West Chestnut St., Washington, PA 15301; (412) 225-2220 or (800) 538-3149.


The company's 91-0068 proprietary dual functional internal antistat concentrate is intended for antistatic polyethylene film and sheeting used in packaging computer parts, sensitive electronic components, and military hardware - the company believes that the product is the only antistat system that can consistently meet or surpass the requirements of Mil-B-81705C. Product 91-0068 is amine and fatty acid free; it is said to offer superior static decay and surface resistivity performance at 15% relative humidity; and it promises superior thermal stability at temperatures exceeding 475 [degrees] F, thus allowing a wider window of extrusion conditions and enhanced shelf life. Polymer Materials, Inc., P.O. Box 127, Jasper, TN 37347; (616) 942-9195; Fax (615) 942-5885.


Type 7812W fiberglass panel roving reinforcement is reported to provide an attractive laminate in clear, translucent, or filled panels of light to medium weight. The panel roving achieves good clarity in both unmodified and acrylic-modified clear resin systems, provides fast wet-out and wet-through (which permits high processing speeds on continuous laminators), and takes pigments well in a broad spectrum of colors.

Hybon 2011 single-end roving is a fiberglass roving reinforcement that features high mechanical strength and maximum wet-out in pultrusion applications. Its soft strand provides uniform glass distribution and high composite shear and flexural strength. With proper processing, the manufacturer says, fuzzing is negligible.

Type 5555 roving and Type 5553 roving, which have been developed for use with fiber-directed preform processes, are designed specifically for liquid composite molding applications, such as resin transfer molding (RTM).

Its fine-strand geometry reportedly makes Type 5555 an ideal reinforcement for preform molding smooth cosmetic parts - such as outboard motor shrouds, truck hoods, safety helmets, swimming pool filter housings, and one piece cafeteria-style chairs. Type 5553 roving is described as having a coarser strand geometry, resulting in increased impact strength and easier resin flow during the preform molding of long flow, noncosmetic parts such as transformer pads, underground septic tanks, and automotive underbodies.

Although differentiated by strand coarseness, 5555 and 5553 have identical sizing chemistry and performance characteristics. They chop cleanly with low static levels; conform uniformly to preform screens, thus permitting good resin flow; and wet out completely in many types of polyester resins.

Among the firm's other new rovings are Type 798 bulked fiberglass roving, a texturized product that incorporates transverse filaments in addition to axially oriented filaments, and Type 5528 roving, a medium hard, medium soluble fiberglass roving reinforcement suitable for SMC automotive and industrial applications in which molded parts are either pigmented or painted. Said to be ideal for polyester resin applications, 5528 wets out quickly and thoroughly and offers favorable composite mechanical properties such as tensile and flexural strength. PPG Industries, Fiber Glass, Marketing Communications, One PPG Place, 32 West, Pittsburgh, PA 15272; (412) 434-3019.


The PQ Corp. recently introduced two new microsphere products.

Extendospheres SF10 are ceramic hollow microspheres reported to be suited for such applications as sealants, plastisols and asphaltic underbody coatings, high mil-build industrial maintenance coatings, and plastics composites. The gray microspheres have an average diameter of 65 microns, a specific gravity of 0.70 to 0.80 g/cc, and a compressive strength of 2000 psi. For better performance in highly specialized polymer and coating formulations, they may be surface modified by the firm's Bubblekup process.

Q-CEL 636 hollow borosilicate microspheres, designed for use in plastisol applications, are free flowing white spheres with a hydrophobic coating. The products have an effective density of 0.36 g/cc, a mean particle size of 57 microns, and a maximum working pressure of 1500 psi. High volume loadings, acceptable viscosity levels, good thixotropic characteristics, and excellent spray and antisag properties are reportedly among the benefits of the additives. The PQ Corp., Valley Forge Executive Mall, P.O. Box 840, Valley Forge, PA 19482-0840; (215) 293-7200.


Late last year, Quantum Chemical Corp.'s USI Division developed three new highly loaded Spectratech white concentrates. The products, said to yield excellent dispersion in downgaged polyethylene film, are PM 82053, an LLDPE-based concentrate for blown and cast film; CM 82072, an LDPE-based concentrate for blown and cast film; and CM 82055, an LDPE-based concentrate for extrusion coating. All three contain 80% Ti[O.sub.2].

The concentrates reportedly allow film processors to use less concentrate to achieve levels of opacity comparable to those of concentrates with lower Ti[O.sub.2] loadings. Typical letdown ratios are said to be 10:1 or lower. The concentrates are sanctioned under U.S. FDA regulation 21 CFR, Section 177.1520, for polymers that may be safely used as articles or components of articles intended for contact with food.

Earlier this year, the division introduced a new line of fluorescent concentrates that contain no heavy metal pigments. The concentrates reportedly offer improved colorfastness and processability, and can be used with polyethylene blowmolding, injection molding, and film extrusion. They include CM 74033 orange, CM 74104 magenta, CM 74034 red, CM 45155 chartreuse, and CM 74106 red/orange. In May, the USI Division announced that it has completely discontinued the use of cadmium-, chromium-, and lead-based pigments in its line of color concentrates. Quantum Chemical Corp., USI Division, 11500 Northlake Dr., P.O. Box 429550, Cincinnati, OH 45249.


ReedLite Nylon colorants are a new line of cadmium- and lead-free products for nylon 6 and 6/6 compounds. The twelve-color line, which promises excellent heat stability and color consistency, consists of pink, red, orange, purple, white, yellow, blue, green, tan, brown, and light and dark gray. All formulations have been subjected to molding, drying, migrating, and weathering testing; they meet the criteria of Underwriters Laboratory's QMQS Component-Flame Retardant and/or color concentrates for both nylon and nylon 6/6.

The company considers the colorants to be alternatives to heavy metal formulas, but does not recommend their use with certain heat stabilized grades of nylon 6 and 6/6. Because the high chroma colors may not meet lighfastness requirements, applications in which light stability is a principal requirement should be carefully reviewed, the company says.

ReedLite colorants also have no selenium, mercury, or arsenic. Their wide range of applications include the electronic, electrical component, automotive, and mechanical markets. The company plans to introduce several new ReedLite lines this year.

Additions to other heavy metal free lines include: four colors - water blue tint, transparent yellow, transparent green, and brown - to the Barex line for BP's Barex nitrile resin for packaging applications; and seven colors - Daffodil and Sunflower Yellows, Mandarin and Seville Oranges, Strawberry and Cherry Reds, and Alpine Green - to the OmniColor line for most low-to-moderate performance plastics. Reed Plastics Corp., Holden Industrial Park, Holden, MA 01520; (508) 829-6321; Fax (508) 829-2118.


Reedy International Corp. offers Safoam, an endothermic nucleating agent and chemical blowing agent with GRAS status (generally recognized as safe by the U.S. FDA). The additive is available in two powdered forms: Safoam FP, a fine powder designed for fine cells, and Safoam P, a regular powder for most general applications. It is recommended for applications in polyolefins, PS, ABS, PPO, and PPE, and as a nucleating agent for direct gassed systems that use freons, pentane, butane, isobutane, nitrogen, and carbon dioxide. Reedy International Corp., 42 First St., Keyport, NJ 07735; (201) 264-1777.


Rohm and Haas Co.'s Paraloid KM-334 is a high performance impact modifier for maximum gloss reduction in vinyl siding. The product, an all-acrylic formulation developed to meet consumer demands for vinyl siding that closely resembles wood, is reported to impart good weatherability and impact strength (3.2+/0.1 Gardner) at 6 phr loadings. According to the manufacturer, the modifier features a wide processing window for high extrusion rates and demonstrates excellent thermal stability and low die swell for dimensional stability.

Paraloid HT-510 is an amide-based heat distortion temperature (HDT) modifier for vinyl that, according to the manufacturer, boosts vinyl's service temperature, maintains vinyl's glass-like clarity, offers outstanding weatherability, and is highly cost efficient. The modifier is totally miscible in vinyl and reportedly improves service temperature without increasing color and haze values. Areas targeted for the new modifier include siding and window profiles, especially darker colors; hot water pipe fittings and heat resistant pipe wrap; hot fillable (to 212 [degrees] F), high clarity containers and other packaging; and heat resistant injection molded appliance housings and parts.

The company says that the modifier has enabled Protex Corp. (Clearwater, Fla.) to offer vinyl jacketing and fittings that have service temperatures 50 [degrees] F higher than those of conventional vinyl materials. The jacketing is used to protect hot piping and vessels in industrial applications. According to Terry Hayward, research director for Protex, the modifier gives vinyl the performance capabilities of an engineering plastic.

The Paraloid EXL-4000 series, introduced late last year, is a family of acrylicimide copolymer additives reported to improve thermal and optical properties in engineering plastics. The additives are formulated to be miscible, compatible, or reactive with selected polymers, allowing for the creation of blends with improved properties. They reportedly offer excellent heat resistance (Tg range 145 [degrees] C to 170 [degrees] C), and a high refractive index with low haze for good clarity. Other features of the series include a high modulus (540,000 to 620,000 psi), resistance to most chemicals, and low permeability.

At this year's NPE, the company introduced several new products. Paraloid EXL-5137, a gloss-reducing additive, is designed for use as a matting agent in ABS and PC molded parts for automotive interiors and electric/electronic housings. Solacryl acrylic polymers are a series of capstock materials that reportedly improve the color hold of vinyl siding. EXL-3611, which that imparts low temperature strength without loss of stiffness in nylon, and EXL-5375, which increases the toughness of microwaveable polyester trays, were also introduced.

The firm has developed two new tougheners that improve the heat stability of engineering resins. Paraloid EXL-3657, an MBS toughener for PC and PC blends, reportedly offers processing stability at temperatures exceeding 600 [degrees] F. The company says that it can be used at oven-bake temperatures because of its excellent resistance to heat aging. It also imparts improved low temperature toughness to the resin system. Paraloid EXL-3361, an acrylic core-shell toughener, is reported to be effective in PC, polyesters, PBT, and various blends. Besides offering outstanding impact properties, it is said to provide excellent stability of toughening characteristics during high temperature processing, heat aging, and exposure to UV light.

Another recently introduced product is the Paraloid K-130 processing aid, an acrylic-based additive designed to improve processing efficiency and promote optical clarity in vinyl packaging. The product, said to be ideal for blow-molded bottles and calendered vinyl sheet and film, provides excellent optical properties and low haze (2.1% at 1.4 phr) in typical 0.025-in bottle wall thicknesses. It is also said to feature excellent dispertion characteristics and effective process heat stability up to 203 [degrees] C. Rohm and Haas Co., Independence Mall West, Philadelphia, PA 19105; (215) 592-3295 or (800) 356-3402.


Apacider, a dry powder that may be used as an antimicrobial additive for plastics, ceramics, and nylon, is reported to have potential uses in both industrial and domestic products. The additive uses stabilized silver as a killing agent and can withstand high temperatures; it is thus suitable for plastics injection and ceramics manufacture. It is also said to be unaffected by general cleaning.

The stability of the product is achieved by bonding silver chemically with hydroxyapatite (HAP). Substitution of metals - such as silver or copper - for calcium in the HAP crystal lattice is reportedly the key to the product: The substituted metal atoms are held very tightly in the HAP lattice, stabilizing the compound to light and heat and preventing the release of silver or copper.

The manufacturer says that Apacider may be used in products such as air and water filters, medical protective clothing, infection control screens, surgical instruments and surfaces, food processing surfaces, and antifouling paints. SGA (Sangi Group America), 22554 Ventura Blvd. Suite 127, Woodland Hills, CA 91364; (213) 680-1467.


Last year, Spectrum Colors introduced a new line of colorants for foamed polystyrene applications. The FDA acceptable pigments are reported to be an attractive alternative to traditional foamed polystyrene dye formulations, which have raised questions about levels of color migration. The term "FDA acceptable" is defined as meeting proposed CFR21-178.3297, Colorants for Polymers, as published in the U.S. Federal Register.

According to the manufacturer, advanced technical capabilities and processing equipment have enabled the company to successfully replace current foamed polystyrene dye formulations with the new pigments.

Late last year, the company also introduced its Color Flo II liquid coloring system for reactive thermoset applications such as RIM and urethane foam. The highly pigmented, pumpable liquid promises excellent pigment dispersion. It has reportedly demonstrated outstanding performance in soles of foamed urethane athletic shoes, largely because it provides uniform and vivid color throughout the foam.

The firm also introduced a new line of "neon" or fluorescent color concentrates reported to significantly reduce plate-out during blowmolding and injection molding operations. Because they allow for higher pigment loadings, the concentrates provide bright, vibrant colors; they are also formulated to reduce quenching. Host resins include polyethylenes, polypropylenes, polystyrene, ABS, and PET.

Another recent development, announced earlier this year, is the firm's Recycled Black styrene concentrate. Seen as a low cost alternative for many large volume styrene applications, the concentrate is composed of multiple-colored pigments reclaimed during the manufacture of colorants. To give the concentrate a consistent, rich black color, the manufacturer adds carbon black to the reclaimed pigments. The product is available in pellet form and sells for approximately one half the price of other styrene-based color concentrates, according to the manufacturer. Spectrum Colors, 9101 International Pkwy., Minneapolis, MN 55428; (800) 328-5589 or (612) 535-4511.


In March, Statikil, Inc. announced the reformulation of its Statikil antistatic agents. The products, Aerosol SK300 and Liquid Concentrate SK400, no longer contain the ozone-depleting chemical 1,1,1-trichloroethane.

The new formula retains the static eliminating properties of the former agents. The aerosol product can be used in various applications, including plastics, photography, electronics, and computers. For problems of extreme static, the company says that the liquid concentrate can be used either full strength or diluted. Statikil, Inc., P.O. Box 4370, 3675 Copley Rd., Akron, OH 44321; (216) 666-3701; Fax (216) 666-8945.


Last year, Steere Enterprises introduced Plastiglo - a vinyl plastisol that glows in the dark - for use with the company's dip molded and dip coated components. Products made from Plastiglo absorb, store, and emit light from almost all sources. Physical properties of the vinyl plastisol formulations reportedly are not affected by the phosphorescent additive. Parts glow for an hour, and recharge time is said to peak at 4 min. The glow can be maintained indefinitely by short term hourly exposure to light.

In April, the company added fluorescent green, orange, pink, and yellow to its list of custom matched colors. Hand grips, thread protectors, and covers for flashlights and trailer hitch balls are among the consumer applications for the colors, which are reported to improve visibility of the parts. Steere Enterprises, 285 Commerce St., Tallmadge, OH 44278; (216) 633-4926; Fax (216) 633-3921.


New non-CFC mold release agents, which also do not contain methylene chloride or 1,1,1-trichloroethane, are suitable for use in most molding processes and with most thermoplastics and thermosets. They can be applied to molds having surface temperatures ranging from 40 degrees F to 500 degrees F to provide a dry, uniform coating. A quick evaporation rate ensures compatibility with solvent sensitive resins. Products include silicones, dry films, and paintable release agents that accept most secondary operations such as adhesive bonding, plating, and hot stamping. Stoner, Inc., 1070 Robert Fulton Hwy., Quarryville, PA 17566; (800) 227-5538, or (717) 786-7355 in PA; Fax (717) 786-9088.


Earlier this year, Struktol Co. announced three additions to its line of thermoplastics process aids and modifiers.

Polydis TR 065, said to be useful at process temperatures up to 700 degrees F, is designed for use as a blending aid/lubricant for a wide range of compounded polymers. Polydis TR 041, a fatty acid derivative without a metal ion component, reportedly provides maximized hydrogen bonding in highly filled compounds. Polydis TR 071, a blend of amides and a fatty acid zinc complex, is said to provide better lubrication in some filled compounds than single component stearate products.

According to the company, each of the products is useful in compounding flame retardant additives into a range of polymer systems. Their benefits in high filled systems include easier and more uniform blending, better flow and processing properties, and better maintenance of selected physical properties, such as impact resistance.

The company has also announced that Polydis TR 131, an erucamide product that is widely used as a slip agent in olefin films, has application as a process aid or lubricant in thermoplastic elastemers and thermoset rubber systems. The product can function as a mold release agent or as an assist in parts assembly applications in which one part must be slipped over another and snapped into place. Normal levels of use range from 1000 to 3000 ppm. Struktol Co., 201 E. Steels Corners Rd., P.O. Box 1649, Stow, OH 44224-0649; (216) 928-5188; Fax (216) 928-8726.


Customer interest has led to the development of new heat stabilizers for flexible and rigid PVC that are non-cadmium mixed metal stabilizers or non-lead stabilizers for noncritical wire and cable applications. These include: Synpron 350, a barium-zinc powder to replace tribasic lead sulfate in low temperature wire compounds; Synpron 301, a high efficiency non-cadmium powder booster said to perform better than barium-cadmium stabilizers in filled and pigmented calendering and extrusion formulas; Synpron 351, a high efficiency non-cadmium booster said to have efficiency equivalent to high efficiency, cadmium-containing stabilizers; Synpron 305, a non-cadmium powder for automotive applications requiring low fog, urethane stain resistance, and high heat stability; Synpron 1970, a non-cadmium powder for use with a high efficiency, non-cadmium liquid stabilizer; Synpron 1960, an ultrahigh efficiency, non-cadmium stabilizer used in critical clear and semirigid applications; Synpron 1997, a high efficiency non-cadmium liquid said to be able to replace most barium-cadmium liquid stabilizers; and Synpron 1981, a high efficiency non-cadmiumliquid said to be able to replace many barium-cadmium liquid stabilizers. Synthetic Products Co., 1000 Wayside Rd., Cleveland, OH 44110; (800) 321-4236 or (216) 531-6010; Fax (216) 486-6638.


Recent additions to Teknor Color Co.'s product line include two black vinyl color concentrates that are formulated without lead or cadmium: Black 1014, designed for flexible PVC, and Black 1017, for rigid PVC compounds. Both are reported to be excellent for use in extruded and injection molded products.

AT NPE, the company introduced Tek Specks. A typical molded part has a white base color with thousands of tiny blue specks. The white base color can be changed, as can the color of the specks; colors can be combined to achieve, for example, a red, white, and blue effect. The "Granite" look consists of a white color with black specks - the company says that this combination approaches the look of granite. Teknor Color Co., 505 Central Ave., Pawtucket, RI 02861; (800) 556-3864 or (401) 725-8000; Fax (401) 725-8095.


Plastics Additives Systems, a business unit of Union Carbide's Specialty Chemical Division, has developed the Unistab D-33 liquid antioxidant for polyolefins. The additive - a 40% dispersion of a high molecular weight, hindered phenolic antioxidant in a functional fluid - reportedly enhances resin quality and consistency by dispersing uniformly; it also promotes uniform dispersion of other additives in the polymer matrix.

Unistab D-33 is also said to reduce yellowing in polymers by preventing phenolic antioxidant/catalyst residue reactions. Available as a pumpable liquid, it permits precision delivery and solves metering problems often encountered with solid antioxidants. The manufacturer says the product is easier and safer to handle than similar additives in powder form. D-33 is effective in various thermoplastic polymers, including HDPE, LLDPE, PP, and nylon. It can be used in film, fine fiber, stretched tape, and molded parts, and is well suited for higher processing temperatures. Union Carbide Corp., Chemicals & Plastics, 39 Old Ridgebury Rd., Danbury, CT 06817.


Several new chemical blowing agents are being added to the company's Celogen, Kempore, and Expandex product lines, Victor Wigotsky reported in the July PE.

Uniroyal says that a development grade blowing agent, a modified azo, has in tests been able to reduce the yellowness characteristically produced by azodicarbonamides.

The company has also been working with its Expandex line of high temperature tetrazole-based foaming agents. Expandex 5-PT, 5-phenyl tetrazole, is a popular agent for PC. A modified liquid tetrazole, available for sampling only, has a decomposition temperature and use range similar to that of 5-PT. Lab testing indicates that use of the additive results in PC foams with higher impact at equal density, compared with 5-PT foamed PC. Uniroyal Chemical Co., Inc., World Headquarters, Middlebury, CT 06749; (800) 322-3243.


U.S. Borax & Chemical Corp. now offers XPI-228, an extra-fine grade of its Firebrake ZB flame retardant, smoke suppressant, and anti-arcing agent. The additive has a typical mean particle size of 1 to 3 microns and a top size of approximately 6 microns.

Another recent addition to the firm's product line is XPI-227, an anhydrous zinc borate with a typical mean particle size of 1 to 3 microns. According to the manufacturer, the product can be used as a smoke suppressant in engineering plastics processed above 290 degrees C. U.S. Borax & Chemical Corp., 3075 Wilshire Blvd., Los Angeles, CA 90010-1294; (213) 251-5464. Fax (213) 251-5455.


A year ago, Vista Chemical Co. announced that it would be eliminating the use of cadmium as a heat stabilizer in its extrusion and injection molding grade PVC compounds. The company's goal is to eliminate cadmium as a stabilizer from all of its PVC compounds by the end of this year. Vista Chemical Co., 900 Threadneedle, Houston, TX 77079; (713) 588-3000; Fax (713) 588-3236.


The firm is the sole U.S. distributor for Reckitt's Colours Ltd. of England, the world's largest producer of ultramarine pigments. New offerings are Reckitt's blue, violet, and pink ultramarines, which have FDA approval and are environmentally safe. Manganese violet pigments have also been added. Whittaker, Clark & Daniels, Inc., 1000 Coolidge St., South Plainfield, NJ 07080-1000; (800) 732-0562.


Witco's Argus Division has developed a series of non-cadmium heat stabilizers for vinyl applications. Products for the automotive market include Mark 4754, a high efficiency, barium/zinc liquid stabilizer for moderate heat stability and excellent color retention at process temperatures; and Mark 4748 for antifog and urethane stain resistance applications.

In other application areas, the barium/zinc stabilizers Mark 6718 and Mark 4716, powder and liquid, respectively, are offered as replacements for lead compounds in wire and cable jacketing, and a calcium/zinc powder, Mark 6725, for household appliance cords and telephone wire. Barium/zinc powder boosters for liquid stabilizers and higher flash point barium/zinc liquids have been developed. Mark 1979, a new methyltin stabilizer for rigid PVC moldings and extrusions, can be used in either the substrate or capstock of vinyl siding.

For polymers, coatings, and polyester moldings, Argus offers the solvent-free, nonaromatic Esperox C-946 as an alternative to t-butyl perbenzoate. It is said to give fast, efficient cures without aromatic decomposition products. Espercarb 438-M60 is a new peroxydicarbonate low temperature initiator, said to give high activity at low cost for PVC applications.

Two new polymeric plasticizers are the low viscosity Drapex P-23 for electrical tapes with good low temperature properties, and Drapex P-18 for refrigerator gasketing, which does not mar HIPS and ABS on contact.

Sodium bis (para-t-butylphenyl), detailed at the February 1991 SPE Polyolefins Conference in Houston, has been commercialized as Mark 2180. It is claimed to be the first high performance nucleating agent for polypropylene and some propylene copolymers to gain FDA clearance for food contact uses. Zinc stearate is now available in pastille (hemisphere) form for enhanced bulk handling. Pastilles are said to flow easily and to be virtually dust free. Witco Corp., Argus Chemical Div., 520 Madison Ave., New York, NY 10022; (212) 605-3600.

Additions to the Humko Division's MoldPro line of oleochemical-based internal mold release agents include: MoldPros 877 and 855 for polypropylene, the former for general-purpose injection molding, the latter for injection molded parts that require printing; MoldPro 876 for foamed polyethylene; and MoldPro 830 for styrene block copolymers. Two agents that impart self-lubricity to TPE compounds are MoldPro 613 for polyolefinic TPEs, and MoldPro 619 for vinyl-based TPEs. Humko Chemical Division, Witco Corp., P.O. Box 125, Memphis, TN 38101; (901) 320-5800.


Cleanlube is a high temperature lubricant touted as a replacement for molydisulfide, oil, and graphite lubricants. A liquid paste lubricant at temperatures below 300 [degrees] F, the additive forms a white, dry, lubricating boron nitride film when heated. It is usable to 2000 [degrees] F in all atmospheres, and to 3000 [degrees] F in inert. Cleanlube is said to be noncorrosive, safe, and easy to use. Although it contains no water, it can be removed easily with water. ZYP Coatings, Inc., P.O. Box 208, Oak Ridge, TN 37831; (615) 482-5717; Fax (615) 482-1281.
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Title Annotation:directory of plastics manufacturers and their new products
Publication:Plastics Engineering
Article Type:directory
Date:Sep 1, 1991
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