PVC heat stabilizers.

ADELL PLASTICS, INC.

Specializing in engineering thermoplastics, company offers heat-stabilizer concentrates on a custom and proprietary basis. Concentrates of other additives, including multifunctional concentrates containing more than one type of additive, also available.

AJINOMOTO USA, INC.

Plenlizer ST-210, a polyol ester costabilizer for PVC resins, is used in conjunction with zinc stabilizer for improved heat stability and weatherability.

AKCROS CHEMICALS AMERICA

Manufactures a line of metallic-based products. Interstab and Stanclere lines of stabilizers are formulated for calendering, extrusion, injection molding, and various plastisol operations.

Barium/cadmium/zinc stabilizers for general-purpose flexible PVC applications reportedly provide exceptional initial color, as well as excellent heat and light stability. Air-release and dry-blending characteristics are said to be excellent, as is resistance to viscosity buildup and plateout. Available in solid and liquid forms.

A non-cadmium-containing series of Interstab products is also available for a wide range of processing and product-life requirements. Products are liquid bafium-zinc-phosphite and calcium-zinc-phosphite complexes that impart exceptional thermal and dynamic stability.

Also produces Stanclere organolin stabilizers for rigid PVC. They reportedly offer excellent long-term heat stability and early color control, plus improved processing, and are available in liquid or solid form, either mercaptide or sulfur-free. These include butyltins for pipe, siding, window profiles and other rigid applications. They also include an octyltin mercaptide for FDA bottles and sheet.

Nontoxic calcium/zinc stabilizers are offered for food-contact PVC. These are especially designed for rigid or flexible compounds and are available in solid, paste and liquid form. They are generally used with phosphite chelators and epoxy secondary plasticizers.

Organophosphite auxiliary stabilizers are for FDA-approved and general-purpose uses. Major advantages reportedly include improved early-color control and long-term stability.

BAERLOCHER USA

Manufactures PVC heat stabilizers primarily for the flexible vinyl market, which includes full line of mixed-metal stabilizers (barium/cadmium, barium/zinc, cadmium/zinc) used primarily in flexible vinyls.

Also imports (from its parent in Germany) lead stabilizers used predominantly for wire and cable. Packaging options minimize environmental and health concerns.

Prosper specialty tin stabilizers primarily for rigid PVC exhibit low-odor and high-heat stability.

CARDINAL STABILIZERS INC. CARDINAL CAROLINA CORP.

Offers low-cost, liquid organotin stabilizers for PVC. CC-7711, CC-7711A and CC-7712 for rigid pipe and profiles are said to show excellent cost-performance. CC-101-110 and CC-101FC are products with reportedly superior cost-performance and excellent color hold for injection molding. CC-1015M is for siding and window profiles. CC-11 can be used in many processes but is particularly recommended for high-gloss sheet extrusion. For general-purpose rigid PVC bottles and containers CC-400 series is recommended; and CC-100 series for nonsulfuric-containing products.

CIBA-GEIGY CORP. ADDITIVES DIV.

Offers Irgastab T-265 octyltin mercaptide for food-grade PVC, such as bottles. Irgastab T-634 tin carboxylate is said to be particularly effective when used with a light stabilizer in dark PVC siding.

EAGLE-PICHER INDUSTRIES INC. CHEMICALS DIV.

Offers EPIstatic lead stabilizers for PVC, including tribasic lead sulfate, basic lead silico-sulfate, and dibasic lead phthalate. These materials are also available with organophilic surface modification to improve dispersion and reduce energy requirements during processing. Nondusting grades also available. EPIstatic products are used as the primary stabilizers in both rigid and flexible PVC and in PVC foams. Their stabilization properties and efficiency are due in large part to a higher specific surface than other similar products.

ELF ATOCNEM NORTH AMERICA INC.

Organotin stabilizers offered for rigid PVC. Thermolite 175, 175C, 310 and 310C are liquid organic stabilizers. Thermolite System 4 is a multifunctional stabilizer-lubricant for PVC pipe extrusion. Thermolite 176, based on tin technology, is a part-for-part replacement for Thermolite 175C and Thermolite 310C. Superior cost/performance, color hold, and odor are among Thermolite 176's reported advantages.

Thermolite T-133 and T-137 are for injection molding, while T-137, T-34, and T-31 Super are for siding and profiles. Thermolite T-149 is for foam profiles. Thermolite 31 is used in every process (profile, sheet, pipe), as well as any PVC or CPVC polymer or copolymer.

For rigid PVC containers and extruded sheet, Thermolite-31, 66 and 108, are recommended depending on formulation and equipment variables. General-purpose bottle stabilizers with improved cost/performance are in development.

Thermolite-350 and other customized organotin maleate stabilizers are for calendered rigid PVC film/sheet where resistance to sulfide staining is required. Tin mercaptides are available for applications not requiring sulfide stain protection.

A line of radiation and heat stabilizers for PVC medical devices and packaging is said to offer resistance to color degradation and loss of physical properties upon exposure to gamma irradiation.

Thermolite 831 and 813 octyltins remain the major stabilizers for use in food-grade bottle and sheet applications. New octyltins based on a mono-octyltin derivative and approved by FDA also available.

FAIRMOUNT CHEMICAL CO., INC.

Mixxim DBM, a beta di ketone with excellent heat stability and color is used in lead-free and cadmium-free stabilizer systems. Replaces heavy metals.

FERRO CORP. BEDFORD CHEMICAL DIV.

Therm-Chek noncadmium mixed-metal liquid, powder or paste heat stabilizers available for rigid and flexible PVC applications and processes, such as flooring, wall covering, packaging, and automotive.

Specialty Therm-Chek organotin stabilizers offered for PVC, ABS/PVC, and other polymer blend applications.

EZn-Chek heat stabilizers with dynamic stability are designed for lead replacement in wire and cable applications.

HALSTAB DIV. HAMMOND LEAD PRODUCTS INC.

Lead stabilizers for PVC include lead sulfates, phthalates, carbonates and co-precipitate complex types--all in lubricated and nonlubricated forms. Specific areas of use are wire and cable, rigid and flexible profiles, conduit, nonpotable pipe, foam, rigid and flexible sheet, moldings, plastisols, organosols and weather-resistant applications.

HARWICK CHEMICAL CORP.

Produces plasticizers and PVC-based concentrates of various heat stabilizers.

HENKEL CORP.

Stabiol calcium/zinc heat stabilizers are suited for PVC rigid containers intended for food-contact applications, such as bottles for drinking water.

LUBRIZOL CORP.

Offers Lubrizol products as intermediates in the production of heat stabilizers.

Lubrizol 2106 overbased barium phenate features high barium metal content in liquid form without the use of volatile solvent.

Lubrizol 2116 is an overbased barium carboxylate complex. In liquid form it provides a typical 34% barium metal content in a light amber color.

Lubrizol 2117 is an overbased liquid calcium carboxylate, which has a light color and is free of any toxic heavy metals. Studies indicate that 14%-calcium Lubrizol 2117 offers significant formulating advantages in development of liquid calcium-containing stabilizer packages. Product is in compliance with FDA regulations for indirect food contact.

MORTON INTERNATIONAL, INC. MORTON PLASTICS ADDITIVES

Furnishes organotin heat stabilizers for rigid PVC. Advastab TM-181 is a high-performance stabilizer for siding, profiles, injection and blow molding. Other grades include TM-692 for pipe; TM-694 low-cost heat stabilizer for pipe; TM-604 for injection molding; and TM-948 for general-purpose bottles.

Advastab TM-2080 is a high-performance, FDA-approved stabilizer for rigid PVC in food-contact applications. Advapak LS-203 "one-pack" multifunctional lubricating stabilizer is recommended for high-output PVC pipe production on twin-screw extruders.

Advastab TM-404 methyltin heat stabilizer for clear rigid PVC food packaging offers less odor and better early and mid-range color hold.

MRS CHEMICALS, INC.

Offers PVC stabilizers offered in powder and liquid for standard and non-toxic applications in plastisols, calendered films and other PVC compounds. Special stabilizers available for mechanically frothed or chemically blown foams. Stabilizers provided to retard or accelerate chemical blowing agents such as azodicarbonamide.

OM GROUP, INC.

Offers line of mixed metal, liquid and powder stabilizers for flexible PVC, including solvent-free liquid stabilizers that allow low emmissions and are suitable for automotive, low-flame spread, and plastisol coating applications.

Line includes proprietary calcium-zinc and barium-zinc stabilizers, many of which are FDA sanctioned. Low-odor tin carboxylates also available.

SHEPHERD CHEMICAL CO.

Manufactures cerium octoate (2-ethyl-hexanoate) for PVC, silicone rubber, and various other polymers.

SYNTHETIC PRODUCTS CO.

PVC heat stabilizers include barium/cadmium, barium/zinc, calcium/zinc, tin, antimony, and lead custom designed for flexible PVC, including plastisols and organosols.

For rigid PVC pipe, antimony mercaptides are said to have an economic advantage over tins. Also offered: high-efficiency barium/cadmium powders with improved early color for outdoor use; organotins for general-purpose bottles; and nontoxic calcium/zinc and calcium/stannous/zinc powders and pastes for food-contact use. Dispersions of lead, barium, cadmium, tin and zinc-based compounds as concentrates or as pumpable pastes for automatic metering are available.

Synpron 350 line of stabilizers are lead-free heat stabilizers for PVC wire and cable jacketing and insulation. Products are barium-zinc powders and are direct replacements for most lead-based stabilizers, providing excellent color, long-term heat stability and good electrical properties.

WILSON COLOR INC. A UNIT OF M.A. HANNA CO.

Offers heat and light stabilizer systems in concentrate form. Heat-stabilizer compositions for rigid vinyl siding and profiles are available in multifunctional concentrates.

WITCO CORP. POLYMER ADDITIVES GROUP

Mark stabilizers include solid and liquid mixed-metal types for clear and pigmented, flexible and semi-rigid PVC, as well as plastisols, organosols and vinyl solutions.

Organotins include butyls, methyls and octyls, solids and liquids, sulfur and nonsulfur types for both high-impact and unmodified rigid compounds, including weather-resistant systems. Materials are used in bottles, water pipe, fittings, siding, rigid foam and window profiles.

FDA-regulated stabilizers include octyltins, methyltins, calcium/zincs and phosphites for food-wrap films, beverage bottles and vacuum-formed sheet. Phosphites are also offered for use as auxiliary stabilizers with mixed-metal systems.

Special-purpose systems include one-package stabilizer/antifog additives for meat and produce wrap, stabilizer/activators for plastisol and calendered foams, and flooring stabilizers.

Antimony-based stabilizers for more economical stabilization of rigid PVC available for pipe and conduit.

ZINC CORPORATION OF AMERICA

Zinstabe line of zinc-based foam activator/stabilizers is offered in powdered form for calendered PVC and plastisol foams. They are said to combine heat and uv stabilization with catalytic activation of chemical blowing agents such as azodicarbonamide. Zinstabes reportedly control rate of cell formation and provide overblow protection. They contain no heavy metals such as lead or cadmium and are consequently not prone to sulfide staining.