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Tin-based heat stabilizer
February 1994
Additivesfor Polymers
Tin-based
heat stabilizer
Stavinor T525 from Elf Atochem is a mixture of tin mercaptides and tin carboxylates, and is said to offer a balance between thermal stability and weatherability when used in transparent outdoor applications. Contact: Elf Atochem NA, Three Parkway, Philadelphia, PA 19102, USA. Tel: i-1-215587-7483.
Heat stabilizers
for flexible vinyls
Mark TS-171 and TS-172 are generalpurpose barium-zinc stabilizers from Witco, formulated for use in flexible vinyls. The company say that neither interferes with the printing of calendered wall coverings and similar printed products. They are said to work well with barium-zinc liquid heat stabilizers. Contact: Witco Corp, 520 Madison Avenue, New York, NY 10020, USA.
Non-volatile
heat stabilizers
Mark 4794 and 4796 from Witco contain no volatile solvents. 4794 is a barium-zinc liquid and 4796 is a calcium-potassium-zinc liquid that is offered as an alternative to cadmiumbased heat stabilizers. Contact: Witco Corp. 520 Madison Avenue, New York, NY 10020, USA.
Heat stabilizer for halogenated polymers Baerlocher markets a butyltincarboxylate powder, trade-named Ostan MSLlS, which can be used as a heat stabilizer in halogenated materials. Suggested dosage levels are between 1 and 3%. Contact: Baerlocher USA, WestDrive Street, PO Box 545, Dover, OH 44622, USA.
4
Heat stabilizer for reclaimed polyolef ins Constab offers RJZC 3501 Id masterbatch for heat stabilizing polyolefin-based commingled plastics serap at dosage levels quoted at 2 to 4%. Constab Polymer-Chemie, Contact: Muehnetal 16, D-59602 Ruthen/Muhne, Germany.
Heat stabilizers for wire and cable applications Therm-Chek 6253 and 6254 from Witco are calcium-zinc powdered heat stabilizers designed for use in 60- and 90-degree wire and cable jacketing compounds. Use levels range from 3 to 6 pph. Contact: Witco Corp, 520 Madison Avenue, New York, NY 10020, USA.
Phosphite-based
heat stabilizers
DP-S 9226 from Dover Chemical is a solid heat stabilizer based on tris-nonylphenyl phosphite (TNPP) which has FDA approval. It is offered in a solid form to facilitate compounding with materials such as ABS, PVC, and polyolefins. The active level of TNPP in the solid is said to be about 70%. DP-987, is a liquid pentaerythritol-based diphosphite heat stabilizer for use in polyurethane foams as an anti-scorching agent. Contact: Dover Chemical Corp, PO Box 40, Dover, OH 44622, USA. Tel: +1-216-3437711.
Methyltin stabilizer
mercaptide
heat
Morton International has developed a pair of liquid methyltin mercaptide-based heat
o1994 Elsevier Science Ltd
Additivesfor Polymers
Tin-based
heat stabilizer
Stavinor T525 from Elf Atochem is a mixture of tin mercaptides and tin carboxylates, and is said to offer a balance between thermal stability and weatherability when used in transparent outdoor applications. Contact: Elf Atochem NA, Three Parkway, Philadelphia, PA 19102, USA. Tel: i-1-215587-7483.
Heat stabilizers
for flexible vinyls
Mark TS-171 and TS-172 are generalpurpose barium-zinc stabilizers from Witco, formulated for use in flexible vinyls. The company say that neither interferes with the printing of calendered wall coverings and similar printed products. They are said to work well with barium-zinc liquid heat stabilizers. Contact: Witco Corp, 520 Madison Avenue, New York, NY 10020, USA.
Non-volatile
heat stabilizers
Mark 4794 and 4796 from Witco contain no volatile solvents. 4794 is a barium-zinc liquid and 4796 is a calcium-potassium-zinc liquid that is offered as an alternative to cadmiumbased heat stabilizers. Contact: Witco Corp. 520 Madison Avenue, New York, NY 10020, USA.
Heat stabilizer for halogenated polymers Baerlocher markets a butyltincarboxylate powder, trade-named Ostan MSLlS, which can be used as a heat stabilizer in halogenated materials. Suggested dosage levels are between 1 and 3%. Contact: Baerlocher USA, WestDrive Street, PO Box 545, Dover, OH 44622, USA.
4
Heat stabilizer for reclaimed polyolef ins Constab offers RJZC 3501 Id masterbatch for heat stabilizing polyolefin-based commingled plastics serap at dosage levels quoted at 2 to 4%. Constab Polymer-Chemie, Contact: Muehnetal 16, D-59602 Ruthen/Muhne, Germany.
Heat stabilizers for wire and cable applications Therm-Chek 6253 and 6254 from Witco are calcium-zinc powdered heat stabilizers designed for use in 60- and 90-degree wire and cable jacketing compounds. Use levels range from 3 to 6 pph. Contact: Witco Corp, 520 Madison Avenue, New York, NY 10020, USA.
Phosphite-based
heat stabilizers
DP-S 9226 from Dover Chemical is a solid heat stabilizer based on tris-nonylphenyl phosphite (TNPP) which has FDA approval. It is offered in a solid form to facilitate compounding with materials such as ABS, PVC, and polyolefins. The active level of TNPP in the solid is said to be about 70%. DP-987, is a liquid pentaerythritol-based diphosphite heat stabilizer for use in polyurethane foams as an anti-scorching agent. Contact: Dover Chemical Corp, PO Box 40, Dover, OH 44622, USA. Tel: +1-216-3437711.
Methyltin stabilizer
mercaptide
heat
Morton International has developed a pair of liquid methyltin mercaptide-based heat
o1994 Elsevier Science Ltd