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Additives 1990.


As the '90s begin, highly sophisticated additives technology is commonplace. New products abound, as additives are recognized as essentials in the quest for higher-performance, more durable, and lower-cost plastic end-products. Companies merge, new plants are built. And the spotlight is trained on environmental issues: Chlorofluorocarbon (CFC) blowing agents are on the way out. Is biodegradibility a viable option? What does the future hold for heavy metal pigments?

Company by company, then, PE presents its 1990 additives roundup - new products, new developments, and new applications.



The new Dabco 1027 and 1028 catalysts are said to improve processing of microcellullar polyurethane foams, in products such as shoe soles and integral skin. Both catalysts have the same highly reactive chemical component but differ only in concentration and diluent. Because they affect demold time only, they are designed to be blended with other Dabco catalyst systems to obtain a wide range of both demold and cream times. Air Products and Chemicals, Inc., Polyurethane Products Div., 7201 Hamilton Blvd., Allentown, PA 18195; (800) 345-3148; Fax (215) 481-5900.


Last year, Akzo Chemicals Inc. introduced a line of non-cadmium Interstab heat and light stabilizers for flexible and semirigid PVC compounds. Barium-zinc liquids LT-4780 and LT-4781 are designed primarily for clear and moderately filled formulations. Barium-zinc liquids LT-4752, LT-4775, and LT-4785 function well in medium-to-soft compounds at medium-to-high filler levels. LT-4797 and LT-4798, essentially pH variations of LT-4780 and LT-4781, are for general-purpose clear and filled formulations. LT-4800 and LT-4801 are barium-zinc/epoxidized soy bean oil blends; each is said to offer excellent performance in general-purpose clear or moderately filled flexible formulations where the processor desires the economy and ease of an ESO blend. LT-4805 is a high efficiency liquid barium-zinc-phosphite heat stabilizer designed for high shear processes.

Interstab barium cadmiums include BC-4748, a high efficiency barium cadmium metal soap stabilizer for use in high clarity flexible PVC products, reported to provide excellent clarity and sparkle with a minimum of haze; BC-4754, an ultrahigh-metal-content liquid soap for both clear and opaque calendering, formulated to provide low plate-out while still providing moderate lubrication; BC-4758, formulated for automotive floor mats, said to perform well in both clear and opaque formulations, and reported to provide excellent heat stability and good viscosity, aging control, and low plate-out; and BC-4769A, a lubricating liquid metal carboxylate for high shear opaque applications requiring early color control.

Interstab calcium zincs for food-contact PVC applications include CZL-715, CZL-720, and CZL-720A. The latter two are primarily intended for stabilization of flexible PVC food-contact articles such as extruded or blown film, FDA tubing, and molded plastisol items. All three of these thermal stabilizers are pumpable, pourable, high-flash-point liquids with very low volatiles content.

Akzo's Stanclere tin stabilizers include T-5507, for PVC formulations pigmented from light pastels to dark earth tones; T-4791, for rigid PVC foam extrusion; T-4743, for weatherable PVC applications; and T-4759, a high efficiency, modified estertin for extrusion of PVC house siding, window profiles, and other weatherable PVC. Akzo Chemicals Inc., P.O. Box 638, 500 Jersey Avenue, New Brunswick, NJ08903; (201) 247-2202; Fax (201) 247-2287.


Allied-Signal's A-C Performance Additives business has introduced ACtone color enhancers, a line of additives that reportedly allow compounders to improve color intensity at reduced cost. The company says the additives offer a range of benefits that include the ability to reduce usage of Quinacridone pigments by 50% and still maintain tint. They are also said to increase the fluorescence of fluorescent dyes and pigments while preventing plate-out. Other properties include improved wetout, thereby preventing particle agglomeration; improved separation of water from press cake in the production of color concentrate; higher pigment loadings while maintaining lower viscosity; and a compatibility with certain base resins that eliminates striation and leaves physical properties unaffected. A-C Performance Additives, Allied-Signal Inc., P.O. Box 2332R, Morristown, NJ 07962; (800) 628-6477; (201) 455-2924.


AluChem Inc. has developed samples of a naturally occurring magnesium hydroxide filler. Known as ACMH-93, the material is reportedly a little less expensive than comparable synthetic or precipitated materials. The firm intends to offer both an untreated and treated grade for higher-threshold-temperature plastics applications. The firm also offers a mechanically ground, superfine grind alumina trihydrate filler, which replaces a precipitated alumina trihydrate product. AluChem Inc., 01 Landy Lane, Cincinnati, OH 45215; (513) 733-8519; Fax (513) 733-0608.


American Cynamid Co. has introduced the dB900 series of conductive Dry-Blend NCG (nickel-coated graphite) fiber plastics additives. NCG fiber reportedly provides injection molded thermoplastic parts with cost-effective protection from EMI, RFI, and ESD. The firm's Dry-blend dB910 NCG fiber concentrate is reported to be compatible with PC, PC/ABS blends, ABS, and nylon. Said to be "molder-friendly" and as easy to use as color concentrates, it has a proprietary binder specifically tailored to the host resin. Each 1/4-in-long pellet contains 12,000 individually plated NCG fiber filaments. According to the company, the user simply has to add the appropriate amount of dB910 concentrate to the resin, then blend in the same manner as regrind material, in order to achieve cost-effective, molded-in EMI/RFI shielding. When drying or vacuum loading, the dB910 concentrate can be handled in the same manner as blended resin. (See PE, April 1990, cover.) American Cyanamid Co., Chemicals Group, One Cyanamid Plaza, Wayne, NJ 07470; (201) 831-3197.


Ampacet Corp. has introduced Process Aid Concentrate 10919 to eliminate sharkskin or die chatter at levels of use lower than those of other process aids currently on the market. The concentrate is a 3% concentration of a new fluoro-elastomer-based additive that is compatible with most resins prone to melt fracture. It is said to be especially effective in polyolefins containing antiblock agents or other inorganic additives, which have occasionally proven to detract from process aid performance.

Concentrate 30985 is a new photodegradable additive that extends Ampacet's line of degradable additive concentrates. The product reportedly enhances the degradability of polyolefins resins without the usual orange tint that accompanies the use of other photodegradable additives. Product 30985 is LDPE-carried, and is recommended for use at 2% to 5%, depending on degree of degradability desired.

Ampacet has also developed a new additive concentrate, product 10967, for use in the reprocessing of biodegradable film. Because of the tendency of its component cornstarch to absorb 10% to 12% moisture, biodegradable film is difficult to extrude without creating voids from the flashing off of moisture at elevated temperatures. The concentrate is designed for critical applications that require the trapping of moisture or other volatilization. Made with a blended carrier system, it is said to be compatible with virtually all polyolefin applications, and has reportedly proven beneficial to the manufacturers of biodegradable film who recycle their edge trim.

Ampacet's pigment yellow 13794 is an organic yellow colorant that is FDA-acceptable for food contact. Developed for the blown and cast film industries, it has become known as "chicken diaper yellow" because of its popular use in absorbent pads packaged with chicken. The colorant is said to be cost-effective and to have good heat stability; it reportedly exhibits the same superior opacity and color values of lead chrome colorants. Although lead chromate has been the yellow colorant of choice for processors, it has had a disadvantage of not being FDA-acceptable for food contact.

During the latter part of 1989, Ampacet inaugurated a $20 million expansion of its Terre Haute, Ind., color and additive concentrate plant. The expansion brings the facility's annual capacity to 250 million lbs. The Terre Haute operation produces a wide range of additive concentrates, including degradables, flame retardants, foaming agents, UV absorbers, antistats, slip additives, anti-oxidants, antiblock agents, carbon black, and multifunctional formulations. The plant expansion gives Ampacet the ability to supply more than 60% of total U.S. requirements for polyolefin additive and color concentrates. Ampacet Corp., 660 White Plains Road, Tarrytown, NY 10591-5130; (914) 631-6600; Fax (914) 631-7197.


Amspec Chemical Co. has introduced two formulated flame retardants, Amsperse F/R 21 and F/R 51. The two materials are described as concentrated aqueous dispersions of antimony trioxide and decabromodiphenyl oxide, and are used in conjunction with a suitable polymeric adhesive binder. They are reportedly applied by a variety of methods to a multitude of substrates. Amsperse F/R 21 is said to be particularly suitable for cellulosic substrates or cellulosic/synthetic blends. Amsperse F/R 51, on the other hand, is more suited to 100% synthetic materials, such as polyesters, polyamides, and polyolefins. Amspec Chemical Co., Foot of Water Street, Gloucester City, NJ 08030; (800) 5 AMSPEC; (609) 456-3930.


Atochem North America says that the FDA has approved three tin-based esterification catalysts for resins used in food contact applications. Fascat 9100, 9102, and 9201, the company says, can lower reaction times by as much as 3:1. The principal food-grade applications include equipment for preparation and serving of food: polyesters for tanks, liners, and piping in food processing plants; microwave ware, including frozen food trays; and powder coatings. The catalysts can also accelerate reactions in polyester hybrid compounds and systems.

Atochem North America was formed at the beginning of this year by the merger of Atochem Inc., M&T Chemicals, Inc., and Pennwalt Corp. Atochem North America, Inc., Three Parkway, Philadelphia, PA 19102; (215) 587-7000.


Avecor, Inc., has introduced a series of liquid-phase colorants for stretch blowmolded PET bottles and jars. The line of opaque colors, applications for which involve packaging and cosmetics, includes a custom made, high gloss "White-White." Because of their ability to be injected directly into the feed mechanism of molding machines, the materials reportedly produce excellent dispersion qualities while maintaining a high gloss appearance. They also reportedly eliminate problems associated with moisture pickup and predrying. Avecor, Inc., 13596 Vaughn Street, San Fernando, CA 91341; (818) 896-5268.


Chem-Trend Inc. has reformulated more than 95% of its line of Mono-Coat semipermanent mold release agents by eliminating chlorofluorocarbon (CFC) solvents from the agents. The firm has also introduced a number of water-based release agents to eliminate flammability and environmental concerns. These products have been extensively field tested under a variety of production conditions, and are said to provide excellent multiple releases with superior part detail and minimal transfer to molded parts. Chem-Trend Inc., 1445 W.McPherson Pk. Dr., Howell, MI 48844-0860; (800) 248-4056; (517) 546-4520; Fax (313) 227-3788.


Chroma Corp. has introduced an LDP (low dust potential) line of dustless dry colors in granular form that are suitable for all thermoplastic resins. The resinated granular system enables the colors to be used without problems such as screw caking and dryer melting. In addition to minimizing the potential health risks associated with dry colors, the lack of dust eliminates cross contamination between machines and simplifies cleanup.

Stabilizer package M-9359 is formulated for reprocessed resins recovered from recycling operations. It stabilizes melt flow, inhibits gel formation, prevents yellowing, and is said to be very cost-effective when used at the suggested high use rate.

A new line of fluorescent dry colors, formulated for polyolefins, consists of Hot Magenta, M-34350; Tangerine Orange, M-34360; Flame Red, M-34370; Brite Yellow, M-41440; Fluorescent Plum, M-53340; and Hot Lime Green, M-61730. Chroma Corp., 3900 Dayton St., McHenry, IL 60050; (815) 385-8100; Fax (815) 385-1518.


Suitable combinations of inorganic synergists incorporated into PVC wire and cable compounds, and without additional halogen, have resulted in OI values greater than 33 and smoke reductions of more than 50%. The company says that use of its zinc borates and molybdenum compounds should enable PVC compounders to meet the most stringent code requirements. Polymer Additives Group, Climax Performance Materials Corp., AMAX Center, Greenwich, CT 06836; (203) 629-6214; Fax (203) 629-6608.


Cookson Pigments has introduced improved versions of two Endurophthal CPC phthalocyanine blues, BT-597-D and BT-649-D. Both promise improved dispersibility and heat stability up to 500 [Degrees] F in polyolefins.

A naphthanil red RT-170-D has been introduced for use in polypropylene fibers; it may also be used in low- and high-density polyethylene. Cookson Pigments, 256 Vanderpool St., Newark, NJ 07114; (201) 242-1800; Fax (201) 242-7274.


Crowley Chemical Corp. reports no brand new products, but says that its Viplex 885 polyester resin modifier is finding use in pultrusions, improving wetout of resin to fiberglass by a factor of 3, improving tensile and flexural strength, heat distortion, and impact resistance, and reducing shrinkage. Crowley Chemical Co., Inc., 261 Madison Ave., New York, NY 10016; (212) 682-1200; Fax (212) 953-3487.



Cyprus Industrial Minerals has introduced a line of talc products that, when added at levels of up to 50%, reportedly enhance the stiffness and heat distortion values of polyolefins. Marketed under the trade name of Stellar Talc, these products are said to offer a high level of optical brightness and color and are certified as being free of asbestiform minerals. Automotive and appliance parts, as well as retort packaging, are among their applications.

Cyprus has also introduced Stellar 500, a talc product said to provide excellent antiblock performance in PE films such as shopping and trash bags. The product reportedly affords good film clarity and color and eliminates the environmental dangers of silica antiblocks. When used in higher concentrations, the company says, it produces "a softer feel" in polyolefin film. It, too, is certified as being free of asbestiform materials.

Stellar 600 and Mistron 699X are two of the firm's new ultrafine platy talc products, said to offer superior impact performance in polyolefin parts. Their median particle size, 1 to 2.5 microns, reportedly optimizes particle packaging and provides improved particle strength. They are recommended for use in impact copolymers for automotive interiors and bumpers and for microwavable dishware. Recent investigations have demonstrated their effectiveness in compatibilizing PET and HDPE.

Last February in Houston, at SPE's Regional Technical Conference on reinforcement, impact modification, and nucleation of polymers, Oscar F. Noel III and William P. Steen of Cyprus Industrial Minerals presented a paper on talc as a compatibilizing and reinforcing agent in the recycling of plastics. Specifically, PET and HDPE, "two of the major components of post-consumer plastic waste," are incompatible. "Their blends exhibit inferior mechanical properties and are difficult to process. But the addition of talc eliminates the processing problems and significantly improves the tensile modulus and stiffness without adversely affecting other mechanical properties." Cyprus Industrial Minerals Technical Center, 8985 East Nichols, Suite 300, Englewood, CO 80112; (303) 643-5000.


Day-Glo Color Corp. has introduced a variety of fluorescent colorants in two different series. Its NX-pigments, offered in five shades, represent an assortment of high strength colorants designed for use in blowmolded PE bottles. The series reportedly offers substantially reduced blowpin plate-out and much greater compatibility with polyolefins. The firm's series of ZQ-pigments have reportedly been found to work well in a wide range of applications, particularly those involving injection molded parts; they can be used in PP and ABS. Besides allowing higher pigment loading in concentrates, they are said to reduce mold plate-out and have very good heat stability. A new addition to the series is Horizon Blue Q-19, which is reportedly 50% stronger than the firm's Z-19 blue pigment. Day-Glo Color Corp., 4515 St. Clair Ave., Cleveland, OH 44103; (216) 391-7070; Fax (216) 391-7751.


D.J. Enterprises offers Sillum-200-Q/P, a noncombustible, chemically stable, inert alumina silicate. The free-flowing bead is said to be easily blended with liquid or powder materials. It is non-thixotropic, nonhygroscopic, water-resistant, and compatible with ATH. The product possesses a high filler-loading capability (40%-60%), excellent suspension and dispersion qualities, and lower viscosity. It is also reported to reduce shrinkage and exotherm temperature and to improve hardness. D.J. Enterprises, P.O. Box 31366, Cleveland, OH 44131; (216) 524-3879.


The Du Pont Co. has developed a new line of six Teflon fluoroadditives for thermoplastics and elastomers. Each reportedly imparts fluoropolymer properties, such as lubricity and nonstick characteristics, to a variety of industrial and consumer products, including moving plastic parts in business machines. Although they differ slightly in particle size distribution, surface area, molecular weight, and suggested applications, all are white, free-flowing powders that are inert to nearly all industrial chemicals and solvents. They have smaller particle size than do other grades of Teflon and can be readily incorporated into other materials. The additives are said to be good electrical insulators and highly resistant to weathering. Du Pont Co., Specialty Polymers Division, Wilmington, DE 19898; (302) 992-3065.


Eastman Chemical's introductions include the following products. The higher densities of the new Epolene 20 series of polyethylene waxes provide better melting profile matches with base resins, improving their effectiveness as dispersing aids for color concentrates and lubricants for PVC extrusion and polyolefins. The oxidized version provides improved clarity in PVC.

Eastman inhibitor HHBP, 4-(2-hydroxyethoxy)-2-hydroxybenzophenone, is a new UV absorber/inhibitor for flexible PVC, ABS, PS, PC, and PVB. It is said to provide excellent permanence and protection compared with other benzophenones and benzotriazoles. Eastobrite OB-1 optical brightener, bis (benzoxazolyl) stilbene, is available as a powder and masterbatch and promises excellent heat and light stability at outstanding cost/performance for thermoplastic polyesters, ABS, nylon, EVA, and PS.

Aquastab additive delivery systems allow additive incorporation to polymers without melting or compounding by forming a strong additive coating via the topical application of various additives from aqueous dispersions. Eastman Chemical Products, Inc., P.O. Box 511, Kingsport, TN 37662; (800) 327-8626.


ECC America Inc. has introduced three new products; Snowpak, an intermediate-sized ground calcium carbonate; Granifil, a natural granite mineral product designed to produce a "granite look" in cultured marble products; and Ecca-Tal 325P, a natural talc product that imparts black color to compounds.

Snowpak is designed to generate high filler loadings and low paste viscosity in glass-reinforced polyester thermoset systems such as SMC and BMC. By providing high efficiency particle packing and low surface area, the product provides low resin demand and, consequently, low viscosity in unsaturated polyester systems regardless of whether filler loading levels are high or low.

Granifil is a granite filler used in open mold systems (cultured marble) to develop a granite appearance in the molded part. It is said to contain a minimum of fine dust and a maximum of chip-like granite particles, thus allowing for higher loadings and effectively achieving the granite look. It is a neutral-colored product reportedly capable of being tinted into a wide variety of designer colors. ECC America Inc., P.O. Box 330, Sycalauga, Al 35150; (800) 251-6327; (205) 249-4905.

Ecca-Tal 325P produces a black-colored compound when added to polyolefins; this characteristic can reduce or eliminate the use of black colorant in many applications. ECC America Inc., Southern Clay Products Subsidiary, P.O. Box 44, Gonzales, TX 78629; (800) 531-5338; (512) 672-2891; Fax (512) 672-3930.


Early this year, Engelhard brought out its new Meteor Plus line, a series of fine-particle, mixed metal oxide pigments intended for coil coatings and building products. Especially suited for architectural plastics, such as rigid PVC for vinyl siding, the pigments are reported to greatly improve weatherability - even the darker colors, which are otherwise known to weather easily.

The color spectrum of the new line ranges from light yellow to conventional browns and blacks, with the exception of red. Some are new; some are modifications of existing products. Coming soon: a high strength jet black and a high strength brown. Cobalt aluminum-based teal blue and green, according to technical service manager Subhash Lele, are bright and attractive, without the "dirtiness" commonly associated with those colors; they are also capable of long-term exposure to sunlight without the deficiencies of organic colors.

Among other features of the Meteor Plus line are the high heat stability inherent in mixed metal oxides; the availability of infrared-resistant pigments; good dispersion (average particle size is less than 2 microns); and, as indicated above, a wider color spectrum than has previously been available. Other suggested applications are in automotives, appliances, and fibers.

At ANTEC in Dallas last month, Engelhard introduced ThermoBrite cadmium pigments, five yellows and six reds, which pass the ISO TC35 test for very low residues. The company says that it will soon offer reduced-dust versions of most of its other cadmium pigments as well. Asked why Engelhard is bringing out new cadmium pigments now, in the face of possible legislation regarding cadmium products, Carlton Johnson, business manager for the company's color business, said that he believes cadmium will not be banned; he compared the cadmium situation with that of lead chromate, for which the market is still viable some fifteen years after people thought it would dry up. He reiterated that this is a low-dust product, and he emphasized the company's unwillingness to abandon a product line that its customers need and rely upon. Engelhard Corp., Specialty Minerals and Colors Group, 114 Mayfield Ave., Edison, NJ 08837; (201) 321-5000; Fax (201) 321-0250.

Engelhard Corp.'s Pigments and Additives Division says that its Translink HF-900 reinforcement, a surface-modified calcined kaolin-based product introduced at NPE '88 (see PE, August 1988, p. 33), has recently found new applications in automotive headlamp housings, where high heat deflection temperature is essential, and in building products and under-the-hood auto parts. Plastics market manager Jeffrey Carr further reports that Ultralink PA-100 reinforcement, also introduced at the last NPE, has found use in numerous nylon products. PA-100, which uses a patented surface treatment technology that chemically tailors the surface of the mineral to the resin system, offers a higher impact property that conventionally treated calcined kaolins, so there is no need to add an impact modifier. Engelhard Corp., Pigments and Additives Division, 70 Wood Ave. South, CN770, Iselin, NJ 08830; (800) 932-0444, or in New Jersey, (800) 624-0818.


Enimont's Uvasil 299 is a new silinated hindered amine light stabilizer that is said to be transparent to UV light, resistant to extractions and volatilization, and capable of high thermal stability. It reportedly provides excellent stability for fibers, tapes, and thick sections such as molded parts in natural and pigmented systems. In addition to its liquid form, the product is available in solid form on silica as Uvasil 125, Industrial Additives, Enimont America, Inc., 1211 Avenue of the Americas, New York, NY 10036; (212) 382-6390; Fax (212) 382-6588.


Ferro Corp.'s Plastic Colorants and Dispersions Division has introduced a line of heavy metal-free, low-plate-out fluorescent color concentrates designed for polyolefin packaging applications. The line reportedly offers improved molding productivity, permitting up to three times the number of molding cycles before mold cleaning than did earlier systems. The concentrates are also said to provide higher opacity and tinctorial strength, and improved physical properties that offset cracking nd pinholing/ Ferro Corp., Plastic colorants and dispersions Division, 3 Railroad Avenue, Stryker, OH 43557; (419) 682-3311; Fax (419) 682-4924.

Ferro has also developed a new heat stabilizer system to meet automotive industry requirements for instrument panels, and a series of new cadmium-free heat stabilizers for calendering and extrusion applications. The Ferro ExtendeVd Peformance system is a heat stabilizer system is a heat stabilizer system having application to instrument panels that do not exhibit color change after 21 days at 25 [degrees] F. Therm-Check 196 poweder, when used at recommended levels in combination with Therm-Chek 923 powder and Therm-Chek 128 or Therm-Chek 129 liquids, reportedly provides sufficient amine-stain resistance and physical property retention to meet the requirements of the automotive industry. The system is suitable for vinyl slush molding dryblends and vinyl alloy systems. The firm's series of cadmium-fre heat stabilizers includes therm-Chek 120 and 145 liquids,which are said to generate a balance of good early color hold and process heat stability in clear extrusion applications; Therm-Chek 127 liquid for highly filled extrusion applications; Therm-chek 114, 115, and 118 liquids for moderately filled composition; and Therm-Chek 145 for calendered clear and filled compositions. Ferro Corp., Bedford Chemical Division, 7060 Krick Road, Bedford, OH 4414-4494; (216) 641-8580; Fax (216) 439.7686.


Frekote Mold Release Products, a business units of Dexter Corp., has introduced a broad line of non-CFC mold release agents said to be environmentally friendly. The new line reportedly includes a new Frekote-NC (for Non-CFC) product for "every type of mold release application" as an alternative to standard Frekote and other mold release agents that contain CFCs. Although all of the base ingredients of the new line are identical to those of Frekote's standard products, trichlorotrifluoroethane has been removed from the solvent carrier and replaced with aliphatic hydrocarbons. Such performance characteristic as wetting, film formations, and drying rates are reportedly improved. Dexter Frekote Products, One Dexter Drive, Seabrook, NH 03874; (603) 474-5541; Fax (603) 474-5545.



Blendex 590 process aid, a new member of GE Specialty Chemicals' family of Blendex modifiers, was introduced last year. Intended for applications such as foamed PVC profiles, Blendex 590 is said to offer equivalent or better performance at lower concentrations than conventional acrylic-based products. GE also says that the product enables manufacturers to obtain higher hot strength, resulting in lower density. Other potential applications include rigid (biaxially oriented) and semirigid PVC that requires greater hot strength for processing. Blendex 590 can be used in applications requiring food contact approvals.

Blendex 424 was also recently introduced. The clear impact modifier, intended for PVC packaging applications, reportedly offers high transparency, low crease whitening, toughness, and good printability.

The company's workhouse Ultranox 626 antioxidant has been approved by the West German State Health Authority for certain food packaging applications at specified maximum loading levels: 1.0% in PVC, 0.1% in polypropylene, and 0.25% in PET and polycarbonate. And the Swiss Institute Registration and Consulting Co. indicates that Ultranox 626 can be used in polyethylene food packaging materials at up to 0.1% loading. Approval for polyethylene in West Germany is still pending.

In January, GE Specialty Chemicals announced plans for a $23 million investment at their facility in Morgantown, W.Va Of that amount, $19.5 million is earmarked for increased production capacity of Ultranox 626. Another $15 million investment, announced a few months earlier, included a $7 million expansion at Morgantown and an $8 million expansion of the Blendex line at Washington, W.Va. GE Specialty Chemicals, Fifth and Averry, Packersburg, WV 26105; (304) 424-5411.


Percy Harms Corp. has reformulated its line of Slide mold releases by removing CFCs from the products. The new CFC-free releases retain the same active ingredients as the former versions and are said to be both inexpensive and productive. They have application in thermosets, lubricants, rust preventives, cleaners, and purging compounds. Percy Harms Corp., P.O. Box 156, 430 S. Wheeling Rd., Wheeling, IL 60090; (800) 323-6433; (708) 541-7220; Fax (708) 541-7986.


Henkel Corp. has developed Loxiol VGS 1809 costabilizing lubricant for PVC/ABS alloys. The company says the product promises excellent internal and external lubrication effects (thus only one lubricant is necessary for total lubrication), improved flow, superior release, dimensional stability, and good printability and adhesion. Further, VGS 1809 produces a costabilizing effect with tin mercaptide stabilizers, thereby providing a potential of 25% to 30% stabilizer reduction. It is especially suited for business machine housings and electrical enclosure applications.

Loxiol VGE 1875 has been developed as an internal/external lubricant for foamed PVC extruded profiles. This product is also a costabilizing lubricant with tin mercaptide stabilizers, and 25% to 30% stabilizer reduction is similarly possible.

The company reports that its Loxiol VGE 1884, VGE 1728, VGS 1877, and VGS 1878 costabilizing lubricants for PVC (see PE, June 1989, p. 37) have attained excellent commercial acceptance. High market acceptance is also indicated for antistatic agents in the Dehydat line: VPA 1726 for clear, rigid PVC; 80X for opaque, rigid PVC; 8316 for plasticized PVC; and 93P for polystyrene. Henkel Corp., 300 Brookside Ave., Ambler, PA 19002; (215) 628-1477 or (800) 654-7588; Fax (215) 628-1155.


Hitox Corp. of America has been active, releasing a number of new products.

Haltex Alumina Trihydrate, a line of filler/extenders that add smoke-suppressive and flame-retardant qualities to a variety of plastics, is available in five grades. Haltex 300 has large particle size (94% retention on 325 mesh); it is produced by the Bayer Process, yielding a 99.5% pure product. Haltex 318 is air classified to reduce superfines - median particle size is 19 microns; main target markets are fiberglass-reinforced plastics (FRP) and acrylic sheets, and it also has applications in epoxies and powder coatings. Haltex 313, with a median particle size of 13 microns, has the widest area of application, including FRP, thermoplastics, urethanes, polyesters, PVC, adhesives, sealants, carpet backing, latex, and rubber. Haltex 310, with a median particle size of 10 microns, is especially suited for flexible PVC, molded FRP, and phenolic molding; other product applications are decorative acrylic sheets and castings, and PVC flexible wire, cable, and rubber compounds. Haltex 304, the finest grade in the line, has a median particle size of 4 microns.

Hitox has also introduced Bartex 80, an addition to its barium sulfate line, promising high dry brightness/whiteness; average particle size is 7 to 8 microns, and barium sulfate content averages 98.0%.

Two pigments are new: OSO 350M Synthetic Yellow Iron Oxide and OSO NR 830M Natural Red Iron Oxide. The company says the yellow offers clean color, with an iron content of 87% plus. Iron content of the red exceeds 88%. Hitox Corp. of America, P.O. Box 2544, Corpus Christi, TX 78403; (512) 882-5175; Fax (512) 882-6948.


Hoechst Celanese Corp. recently added several antistat concentrates to its line of Hostastat Systems E additives: Products E 4751 and E 4353 have joined E 3952, E 3953, and E 3954, which were introduced last year. All of these products have an active ingredient of sodium alkyl sulfonate and a carrier resin of PS or ABS. They are said to reduce surface resistivity and improve processability and pigment dispersions in applications such as extruded or molded PS, HIPS, and ABS parts. Hostastat System E 1906, which is based on lauryl amide in an LDPE carrier, is reportedly less corrosive than the traditional alkyl amine formulation and suitable for electronics applications such as parts for personal computers; other applications include LDPE, HDPE, and those requiring short static decay time at low humidity.

Hostastat System E 5951, another antistat concentrate, is based on lauryl amide in a PP carrier. Its applications include PP and molded parts and extruded sheet requiring short static decay time at low relative humidity.

Hostavin N 20 is a monomeric hindered amine (HALS) said to be particularly suitable for applications requiring high resistance to water extraction; applications include HDPE, PP, ABS, HIPS, and polycarbonates.

The company has also added Exolit IFR 15 and Exolit IFR 21 to its line of non-halogen flame-retardant additives. Exolit IFR 15 is an intumescent charforming agent based on ammonium polyphosphate. It has application in thermoplastic urethanes. Exolit IFR 21 is a non-drip flame retardant that is also charforming and based on ammonium polyphosphate; its applications include polyolefins and thermoplastic elastomers. It is said to be effective in polymers with high processing temperatures of up to 240 [Degrees] C.

The firm also reports the introduction of an additive package, consisting of 0.4% of Hostanox 03 and 1% of Hostanox PAR 24, for the recycling of nylon and polyester. The package reportedly prevents excessive thermal degradation. Hoechst Celanese Corp., Route 202-206, P.O. Box 2500, Somerville, NJ 08876-1258; (201) 231-2000; Fax (201) 231-3225.


Activex is the name of Huber's new endothermic chemical foaming agent, which the company says can be used in virtually any polymer system. It is available as a 100% active powder or as concentrates in polymer compatible carriers. Useful in a wide variety of processes, Activex boasts such benefits as superior cell structure, reduced mold stress and warpage, uniform fine cell distribution, environmental safety, better impact properties, fast degassing and painting, better surface finish, and faster extrusion rates. J.M. Huber Corp., Chemicals Division, P.O. Box 310, Havre de Grace, MD 21078; (301) 939-3500; Fax (301) 939-9216.


Last fall, PDI, a business unit of ICI Americas Inc., brought out two liquid flame retardants: 84-00751 for all grades of polystyrene and 86-00751 for homopolymer and copolymer polypropylene. Each comprises halogenated flame retardants, a stabilizer system, and a liquid vehicle carrier. The company says that lubricating properties of the vehicle, in both cases, improve resin flow with minimal effect on physical properties, since the formulation is normally used at low letdowns of 4.5%, versus 6.7% for conventional pelletized flame-retardant masterbatches. Both systems are aliphatic, so dioxins are not produced upon burning, and light stability is said to be improved over conventional aromatic systems. The liquid flame retardants also have less heat history than pelletized masterbatches.

A year ago, PDI introduced Series 9000-P transparent and opaque liquid colorants for PET stretch blowmolding. They are FDA-approved, highly concentrated, and, the company says, fully compatible with all PET resin formulations.

At the SPI Composites Institute's Conference and Expo '90 in February, the company introduced its latest technology in HMF (heavy metal-free) colorants, which it says will be available in "virtually 100% of the existing color pallet." Said to offer excellent lightfastness and good chemical resistance, and to be non-staining, HMF colorants can be applied to any polyester, epoxy, or polyurethane system for any molding process, including SMC, BMC, gel coats, pultrusion, or wet molding-preforms. They can be combined with other functional additives, such as UV stabilizers, antistats, and antioxidants, PDI, A Business Unit of ICI Americas Inc., 54 Kellogg Court, Edison, NJ 08817; (201) 287-1930; Fax (201) 287-8966.

At the end of last year, ICI Polymer Additives introduced Atmer 164 antistat for polyurethanes; it is especially intended for medical, packaging, electronic, and telecommunications applications. The company says that Atmer 164, a synthetic amine-based cationic compound, can be used for flexible, rigid, or elastomeric urethanes with minimal effect on reactivity or final properties. It is also said to be highly compatible with the full range of polyols.

The Atmer 7000 series was made available in the U.S. this spring, after introduction in Europe a year ago. These "unique new superconcentrates," the company says, achieve 50% or more active ingredient loadings in a polymerspecific carrier. They are produced in pellet and powder forms. Atmer 7001 is an antistat blend for injection moldable polypropylene; 7002 is a single-component antistat formulation also for injection moldable PP; 7006 is an antistat blend for PP film at least 50 microns thick; 7101 is a single-component antifog/antistat formulation for polyethylene film at least 50 microns thick; 7108 is a single-component antifog formulation for LLDPE film at least 50 microns thick; and 7202 is a single-component antistat formulation for injection moldable high impact polystyrene. In addition, all of the 50% active concentrates are said to provide an antiblocking effect without the need for special agents. ICI Polymer Additives, Wilmington, DE 19897; (302) 886-3564; Fax (302) 984-5009.


The new Ken-React NZ 66A and NZ 69 mercapto and thiofunctional zirconate coupling agents enhance the rheological, physical, and corrosion-resistance properties of carbon-black reinforced, sulfurcured elastomers. By increasing the adhesion between the rubber compounds and steel, Kevlar, and polyester tire cord, the coupling agents have also proven beneficial in fiber-reinforced systems.

Ken-Reacts QB 012 and QB 521 pyrophosphato organometallic Quat Blends have also been introduced for water-based polymer systems. Kenrich Petrochemicals, Inc. 140 East 22 St., P.O. Box 32, Bayonne, NJ 07002; (800) LICA KPI; Fax (201) 823-0691.


Laurel Industries, Inc., has introduced Ultrafine II, an antimony oxide-based flame retardant that reportedly improves the impact resistance and other physical properties of polymeric substrates. The submicron flame retardant is said to have the smallest particle size of any antimony oxide-based product; average particle size is 0.3 micron. The company says that Ultrafine II enhances the formation of antimony trihalide, thus reducing the amount of brominated or chlorinated fillers needed to optimize flame retardancy. The product is reported to be ideal for liquid phases of thermoset resins that require thorough dispersion within the substrate before the system is hardened or cured; such resins include unsaturated polyesters, epoxies, polyurethanes, and phenolics. Laurel Industries, Inc., 29525 Chagrin Boulevard, Suite 206, Cleveland, Oh 44122-4617; (216) 831-5747; (800) 221-1304.


Lonza Inc. says its Glycolube AFA-1 offers improved antifog and antistatic performance in PVC food wrap film. When used in such film, it reportedly protects the color and consistency of meat products and produce items such as mushrooms, and its antifog activity allows the product to be used at significantly lower loadings than conventional systems.

The firm has also developed several new products for use with calcium stearate/paraffin lubricant systems in rigid PVC profile and siding compounds. The lubricants are said to provide improved thermal stability and substantial reductions in compound viscosities without affecting the quality of the extrudate. The improvement in thermal stability is sufficient to allow reductions in calcium stearate and stabilizer loadings. Lonza Inc., 17-17 Route 208, Fair Lawn, NJ 07410; (201) 794-2400; Fax (201) 794-2597.


M.A. Industries, Inc., offers a new synergistic additives package designed to improve the performance of recylced resins. The line includes multicomponent light and heat stabilizer concentrates and impact modifiers for recycled PE, PP, PS, and PET resins. Applications include injection molded, blowmolded, and sheet extruded products. Color can reportedly be made as a separate concentrate or incorporated into masterbatches for a turnkey additive system. M.A. Industries, 303 Dividend Dr., Peachtree City, GA 30269; (404) 487-7761; Fax (404) 631-4679.


The formulated Products Division of George Mann & Co. Inc. has introduced Aqualease 6100, a new water-based mold release that reportedly can replace solvent-based formulations "without the accompanying toxicity and environmental hazards." A concentrated blend of silicone resins and oils in a water emulsion, Aqualease 6100 is said to be a stable and efficient release agent designed for use with thermoset resins such as urethane elastomers, epoxies, polyester, and vinyl ester polymers. George Mann & Co. Inc., Formulated Products Division, P.O. Box 9066, Providence, RI 02940; (401) 461-2430; Fax (401) 941-0830.


The Mearl Corp. recently added four new nonmetallic gold pigments to its line of Mearlin Gold Luster Pigments. Besides offering high temperature and nonconductive properties, the pigments are said to be nontoxic, non-arcing, and non-tarnishing. The new grades are Majestic, Aztec, Mayan, and Inca Golds. The Mearl Corp., 41 East 42nd Street, New York, NY 10017; (212) 573-8500.


At SPI's Polyurethanes Conference last fall, Mobay Corp. announced the introduction of Porofor Z, a water-based non-CFC blowing agent for use in producing self-skinning reaction injection molded polyurethane structural foams. A homogeneous paste composed of alkali alumino silicate sieves, water, and a polyether polyol, the product is said to permit a distinct skin to be formed while maintaining physical properties of the foam. A disadvantage, Mobay reports, is that when the paste is blended into any of the polyurethane foams the company evaluated, phase separation of the paste from the blend eventually occurs; constant agitation is necessary to keep the paste dispersed. Porofor Z is intended as an environmentally safe substitute for CFC-11.

Two acrylate-styrene-acrylonitrile (ASA) impact modifiers are in the works: Baymond A TP KU 3-2069 A and 3-2079 A. The former was developed for use in manufacturing non-PVC dashboard coverings in automobiles; the latter, intended for plasticized PVC sheeting, promises improved heat resistance and thermoforming properties.

On another front, Mobay is in the process of building a state-of-the-art manufacturing facility in Bushy Park, S.C., for producing high performance organic pigments. The more than $50 million project is scheduled to be completed late next year. Mobay is the leading U.S. producer of organic pigment for the automotive industry. Mobay Corp., Mobay Rd., Pittsburgh, PA 15205-9741; (412) 777-2496.


Monsanto Chemical Co.'s new Elix family of powder modifiers enhances processability and heat, weather, and impact resistance of PVC. The variety of applications includes business machine housings, television backings, automotive components, electrical parts, pipes, and profiles. Elix 100 is composed of butadiene-based impact modifiers. The 200 series, based on styrene-acrylonitrile (SAN) and alpha methylstryrene (AMS), improves processability and melt strength. The 300 series, which is based on styrenemaleic anhydride (SMA), is designed to improve heat resistance of PVC. The Elix 400 series, with acrylate-styrene-acrylonitrile (ASA) impact modifiers, improves UV resistance. Monsanto Chemical Co., 800 N. Lindbergh Blvd., St. Louis, MO 63167; (314) 694-1000.


Morflex Chemical has introduced two patented plasticizers, Citroflex B-6 (n-butyryltri-n-hexyl citrate) and Citroflex A-6 (acetyltri-n-hexyl citrate), for use in flexible PVC medical articles that require a low order of acute toxicity. Both plasticizers are non-aromatic, nonphthalate, and made from natural components. Tests on Citroflex B-6 for peroxisome proliferation were negative. Physical properties imparted to PVC are similar to those imparted by DEHP, and either plasticizer can replace DEHP in formulations with minimal adjustments. PVC compounds plasticized with B-6 or A-6 can be extruded, calendered, or injection molded. Morflex Chemical Co., Inc., 2110 High Point Rd., Greensboro, NC 27403; (919) 292-1781.



New additions to Morton's line of specialty magnesium chemicals are ultrafine grades magnesium carbonate and magnesium hydroxide. Improved processing and lower smoke evolution are expected benefits of their fine particle size. Compared with calcium carbonate, Elastocarb UF magnesium carbonate (25 phr) reduced smoke by 60% in the flaming mode in rigid PVC, and Versamag UF magnesium hydroxide (25 phr) reduced smoke by 27% and also resulted in longer process stability as measured by a Haake curve vs. a standard grade of magnesium hydroxide.

One of Morton's leading solid biocides, Vinyzene SB-1 PS, a 5%-active agent available in a polystyrene pellet carrier, can now be ground into a 35-mesh granular concentrate for easy formulation into polyethylene resins for rotational molding, enabling many important products to gain protection against mold, mildew, and bacteria. Morton International, Inc., 150 Andover St., Danvers, MA 01923; (508) 774-3100; Fax (508) 777-5672.


NYCO has introduced two new Wollastokup engineered reinforcements - chemically surface-modified wollastonite products for both thermoplastic and thermoset composites. G-RRIM Wollastokup meets current RRIM specifications as a reinforcement additive and promises excellent surface appearance, impact, and elongation properties to RRIM composites. It is the sole specified reinforcement for fenders, fascia, and side cladding on General Motors' APV vehicles. G-40 Wollastokup provides improved dimensional stability and surface appearance in thermoplastic and thermoset applications other than RRIM.

New from the Micacoat line of chemically surface-modified muscovite micas is a high-aspect-ratio product said to provide improved surface smoothness and DOI in polyurethane and polyurea RRIM composites. NYCO also offers ATH Nycoat products - chemically modified aluminum trihydrates that act as reinforcement additives as well as providing flame retardancy and smoke suppression. NYCO, Willsboro, NY 12996; (518) 963-4262; Fax (518) 963-4187.


Plastisperse additives are a new line of virtually dust free, free flowing, high pigment concentration, granular colorants for thermoplastics, thermoplastic elastomers, and thermoset polyesters. Used as a replacement for dry color, freeze-dried, or color concentrates, Plastisperse colorants are said to be cost-effective, and they promise to improve handling and housekeeping. The additives are designed to adhere to the resin pellets, resulting in an even distribution of color in the final part. Coated pellets can be air-veyed without appreciable separation. Additives can be metered into the hopper or drum tumbled with either pellets or powder resins. The company's compact P-2000 Feeder is designed to meter Plastisperse products to the throat of an extruder or injection molder. It features easily changeable nylon feeder cartidges for rapid color changes. Plasticolors, Inc., 2600 Michigan Ave., P.O. Box 816, Ashtabula, OH 44004: (216) 997-5137; Fax (216) 992-3613.


Ben Berkman, vice president for commercial development at PMS, reports on three new product categories that he says represent the initial result of the company's "commitment to becoming a leader in the coloration of engineered thermoplastic resins and alloys": a line of polybutylene terephthalate-based color concentrates in standard NEMA colors for fiber optic cable buffer tubes; nylon-based color concentrates for glass-filled nylon 6/6 resins; and nylon-and polycarbonate-based color concentrates in standard NEMA colors for the molding of electrical connectors.

The company's FluoroFast line (see PE, June 1989, p. 39), specially designed fluorescent and organic pigment color concentrates, promise significantly reduced plate-out on molds, blow pins, and extruder screws, thereby reducing machine downtime for cleaning. PMS Consolidated, 3300 University Drive, Suite 505, Coral Springs, FL 33065; (305) 753-9299.


Last fall, as reported in PE (November 1989, p. 42), Polycom Huntsman unveiled four high-loading products, all in polyethylene carriers, that increase percentage loadings versus competitive products, which the company says improves supply and production economics: D26264, a titanium dioxide, has an 80% concentration, compared with typical 50% to 60%; A27305, an inorganic filler antiblock additive, also features an 80% concentration; the 60% loading of carbon black concentrate B26669 compares with typical 40% to 50% concentrations; and fatty amide slip additive A27018 increases the normal concentration from 5% to 10%.

The company also reports that it no longer uses cadmium pigments and is reducing as much as possible the use of lead chromates. Polycom Huntsman Inc., 90 West Chestnut St., Washington, PA 15301; (412) 225-2220 or (800) 538-3149.


LSC-50 UV-stabilizer concentrate provides UV protection to crystal polystyrene in extruded or injection molded products equivalent to commercial lightstable crystal polystyrene. The stabilizer is designed to be blended in a 1:50 ratio with high heat crystal polystyrene. Finished products meet the industry standard of not more than 15 points Yellowness Factor after 1000 hrs in an Atlas Fadeometer. Typical applications are fluorescent lighting panels and point of purchase displays. Polysar Inc., Clear Plastics Group, 690 Mechanic St., Leominster, MA 01453; (508) 537-1111; Fax (508) 537-2272.


Polyvel's new 10% fluoroelastomer concentrate processing aid for LLDPE film production eliminates melt fracture and enables reductions in die pressure and operating temperature. In fiber production, it eliminates melt fracture and reduces die buildup.

C-200 is a clear, fragranced compound that can be injection molded or extruded directly into parts or finished products and is supplied both as a custom compound and concentrate in various fragrances and flavors. Fragrance and flavor concentrates - with fragrance loadings up to 25% and offered in dry standard-sized or round foamed pellets - are available for use with polyethylene, polypropylene, EVA, PVC, and styrenics. Polyvel Inc., 120 North White Horse Pike, Hammonton, NJ 08037; (609) 567-0080; Fax (609) 567-9522.


PPG Industries has developed two new fiberglass rovings. Type 5510 is a medium-hard roving for automotive and industrial grades of sheet molding compound (SMC) in which molded parts are painted. It is also designed to be used in pigmentable and thick molding compound applications. The company says that 5510 offers complete package payout and transfer; excellent choppability; minimum static, fuzz, and fly; uniform glass content; low sheet loft; and high laminate physical properties.

Type 5538 is visibly whiter than the company's previous structural-grade SMC rovings, providing what the company says are superior fiber hiding characteristics during wetout in pigmented applications. The roving is also said to exhibit superior chopping performance, lower sheet loft, and lower static levels during chopping, enhancing processability. Type 5538 was created specifically for structural applications, such as pickup truck boxes, automotive bumper beams, and basketball backboards. It is said to be ideal for applications using vinyl ester resin because of its contributing reinforcement properties. PPG Industries, 32 East, One PPG Place, Pittsburgh, PA 15272.


Quantum Chemical's USI Division has introduced two Spectratech concentrates with what it says is excellent processability to meet the stringent demands of extrusion coating. CM88100 is a white, 50% titanium dioxide-loaded concentrate in a polyolefin carrier resin having optimum rheological properties. It is designed specifically for use in coating flexible packaging at high temperatures and high line speeds.

CM 92626 is a black concentrate containing carbon black uniformly dispersed in a high-flow base resin. It is also designed for elevated temperatures and rapid line speeds and is suited for coating photographic paper and packaging films. The USI Division has opened a new facility at their Crockett, Tex., plant that provides state-of-the-art quality assurance for their polyolefin compounds and concentrates.

The USI Division has announced that it will shortly discontinue marketing color concentrates containing heavy metalbased pigments. These pigments will not be available from Quantum after December 1 of this year for use in new concentrate formulations, and all use of these pigments will be discontinued by Quantum after May 1, 1991. Quantum Chemical Corp., USI Div., 11500 Northlake Dr., P.O. Box 429550, Cincinnati, OH 45249; (513) 530-6500.


Reed has introduced OmniColor, a line of color concentrates designed to work in the space and inventory limitations of small-and medium-sized processors. The concentrates are offered in 40 standard colors and are based on a multipurpose compatible carrier system that makes them suitable for use in a wide range of low and moderate temperature plastics. Recommended letdown ratio for most resins is 100:1. OmniColor is distributed through General Polymers, P.O. Box 2219, Columbus, OH 43216; (614) 889-3855. Reed Plastics Corp., Holden Industrial Park, Holden, MA 01520.


Rohm and Haas has developed two new impact modifiers. Paraloid EXL-3387 is a reactive all-acrylic core/shell toughener for imparting extremely high impact strength to glass-filled and neat nylon 6 and nylon 6/6 systems. Compounds are also said to exhibit excellent weatherability, color retention, heat stability, and ease of processing.

The all-acrylic Paraloid KM-318F modifier is designed for cellular vinyl applications such as foam-core pipe and extruded foam sheet, where it reportedly improves impact strength, imparts excellent weatherability and thermal stability, and delivers a consistent cellular structure and smooth surface. Rohm and Haas Co., Independence Mall West. Philadelphia, PA 19105; (215) 592-3295.


Stoner's new line of economical, environmentally acceptable non-CFC mold release agents are said to provide more releases per application and have better compatibility with solvent-resistant resins; they also can be used in all molding processes. Products include E935, a silicone release agent for food grade applications; E978, a paintable food grade product; E965, a versatile and paintable clear liquid product formulated for parts to be adhesively bonded or decorated; and E960, a multipurpose and paintable release agent and lubricant that provides a dry antistick coating, eliminating the need for cleaning prior to post-mold decoration. Stoner, Inc., 1970 Robert Fulton Highway, Quarryville, PA 17566; (800) 227-5538 or (717) 786-7355; Fax (717) 786-9088.


Polydis TR 016 and TR 060 are two new process aids designed especially for highly loaded compounds. They are useful in assuring uniform blending of fillers and in acting as internal lubricants at process temperatures. TR 016 is a blend of a fatty acid and an amide. The amide's hydrogen bonding sites enable it to act as a coupling agent between the polymer and filler. TR 060 is a mixture of low molecular weight, light colored aliphatic resins. Because its melt has a natural tackiness, it acts as a binder at process temperatures. Applications utilizing these materials include filled olefins, TPOs, and flame-retarded polymer systems. Struktol Co., 201 E. Steels Corner Rd., Stow, OH 44224; (216) 928-5188; Fax (216) 928-8726.


Synpro's new non-cadmium stabilizer line includes Synpron 1901, a general-purpose, barium-zinc liquid stabilizer that is epoxy compatible and can also be used in flexible applications; Synpron 1950, a high efficiency, barium-zinc liquid stabilizer that is useful in clear and filled calendering and extrusion applications; Synpron 1960, a high efficiency, barium-zinc liquid used mainly in filled calendering and extrusion applications; Synpron 1970, a powder stabilizer used in conjunction with the above liquids - but at lower levels than typical barium-cadmium stabilizers, thereby lowering total formula cost; and Synpron 1795, and FDA-approved powder stabilizer for both clear and filled applications.

Polymeric calcium terephthalate rigidrod microfibers are a new multipurpose compounding ingredient. Stable to 600 [Degrees] C, nonhygroscopic, and insoluble in water and organic solvents, it is available as a fine white powder that the company says is readily dispersible and rapidly wetted. It exhibits strong adhesion to a wide variety of semipolar engineering polymers, making it useful in high temperature composites and high performance coatings. Synthetic Products Co., 1000 Wayside Rd., Cleveland, Oh 44110; (216) 531-6010; Fax (216) 486-6638.


Teknor Color Co. reports that its Color Crystals (see PE, August 1988, photo on p. 27, and p. 30) were used by an injection molder to color safety helmets (see cover photo, this issue); the same molder then discovered that the product could also be used in a hot melt adhesives application. The company says that Color Crystals solved a shrinkage problem experienced with conventional color concentrates. Teknor Color Co., 505 Central Ave., Pawtucket, RI 02861; (800) 556-3864.


Dynamar FX-5920 is a new, granular, freeflowing polymer processing additive (PPA) that both aids in film production and the recycling of these materials. At levels as low as 250 to 1000 ppm, the company says, it can reduce or eliminate melt fracture, reduce extruder torque, increase output, improve clarity and gloss, yield films with more balanced bi-directional properties, and, by lowering apparent melt viscosity, permit use of high strength resins on available equipment. The PPA is useful in low melt index, film grade LLDPE and is reported to be especially effective in polyolefin resins containing silica-based blocking agents, titanium oxide-based pigments, and other inorganic additives. Its stability over a wide temperature range and lack of reactivity give it the capability of being reused and reprocessed over the multiple production and extrusion cycles undergone in recycling. 3M, Industrial Chemical Products Div., Dept. CH90-03, P.O. Box 33600, St. Paul, MN 55133; (612) 733-5455; Fax (612) 736-3094.


In January, U.S. Borax began offering Firebrake ZB-Fine (XPI-192), a zinc borate flame-retardant, smoke-suppressant, and anti-arcing agent. The product is a fine grade of the firm's Firebrake ZB material and is intended to replace Firebrake ZB in applications in which physical properties of the substrate are of vital importance. It has a mean particle size of 2 to 4 microns and reportedly can be used in PVC, nylon, polyester, and polyolefin resins. Its applications include wired cable, thin films, and adhesives.

The firm is also offering several experimental zinc borates. XPI-187 is a dehydrated Firebrake ZB suitable for use in plastics that are processed at temperatures of 290 [Degrees] C or higher. It has a typical mean particle size of 5 to 10 microns. XPI-225, another fine grade of Firebrake ZB, has a typical mean particle size of 3 to 5 microns and is reported to be a superior smoke suppressant. XPI-189 is a submicron water dispersion of Firebrake ZB. It is intended as a partial or complete replacement for colloidal antimony pentaoxide, and is offered for use in flame-retardant textile and other latex systems. U.S. Borax & Chemical Corp., 3075 Wilshire Blvd., Los Angeles, CA 90010; (213) 251-5464; Fax (213) 251-5455.


Witco's Argus Div. has introduced a noncadmium, two-component heat stabilizer system that enables vinyl materials to exceed auto interior industry standards for heat degradation while providing unusual resistance to polyurethane staining. Two combinations of barium-zinc systems are offered, both based on the newly developed Mark 6045, which is used with Mark 6042 for ABS/rubbermodified materials, or with Mark 6711 for plasticized homopolymer PVC materials.

Especially for the bottled water market, Argus now offers Mark 3074, a calcium-zinc heat stabilizer that is said to provide better initial color retention in blowmolded PVC bottles along with low odor and taste characteristics.

Argus reports increasing interest in t-amyl peroxybenzoate because of its improved efficiency over the t-butyl compound. Offered as Esperox 5100, the peroxide is being used as an initiator for polystyrene, polyethylene, acrylic coatings, and high temperature polyester molding systems. Espercarb 840, a 98% di-2-ethyl peroxydicarbonate initiator, is said to provide cost efficiencies in the polymerization of vinyl chloride and its copolymerization with monomers such as vinyl acetate and vinylidene chloride.

The properties of a promising nucleating agent for polypropylene, sodium bis (para-t-butylphenyl) phosphate, were described at the February 1990 RETEC in Houston. The product, expected to be commercialized by Argus by the end of the year, provides excellent thermal stability with little or no volatility at processing temperatures, and its low solubility in common solvents may lead to FDA approval. Witco Corp., Argus Chemical Div., 520 Madison Ave., New York, NY 10022; (212) 605-3600.

The Humko Chemical Div. has expanded its MoldPro line of oleochemical-based internal mold release agents to include a product for styrene-butadiene block copolymers. MoldPro products also increase the mold flow of the resins and reduce the force needed to eject molded pieces. Witco Corp., Humko Chemical Div., P.O. Box 125, Memphis, TN 38101; (901) 320-5800.
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Publication:Plastics Engineering
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Date:Jun 1, 1990
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