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US 8,575,250 B2Granted
Stabilized polymer compositions
AssigneeRohm and Haas Company
InventorsBahar Azimipour, Jian-Yang Cho, Eric G. Lundquist, Gene Norris
Life of this patent
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Abstract
This invention relates to the thermal stabilization of halogen-containing polymer compositions, more particularly, this invention relates to a poly(vinyl chloride) (PVC) or a chlorinated polyvinyl chloride (cPVC) composition comprising a methyl tin stabilizer and at least one salt of a polyacid material such as a polycarboxylic acid, a phosphoric acid, or a boric acid.
Claims2
A stabilized halogen containing polymer composition comprising:
- a) greater than 40% by weight of a halogenated polymeric material;
- b) 0.01 to 5.0 phr per hundred parts of a methyl tin stabilizer comprising a mixture of mono methyl tin stabilizer and dimethyl tin stabilizer wherein the mono methyl tin stabilizer is greater than 25% by weight of the methyl tin stabilizer;
- and
- c) 0.01 to 5 phr of a salt of a polyacid material to form the stabilized halogen containing polymer composition;
- wherein the salt of the polyacid material is a salt of either a polycarboxylic acid, a phosphoric acid, a sulfonic acid or a boric acid;
- further wherein the salt of the polycarboxylic acid comprises salts of adipic acid, succinic acid, itaconic acid, glutamic acid, citric acid.
3 more elements
A stabilized halogen containing polymer composition comprising:
- a) greater than 40% by weight of a halogenated polymer material wherein the halogenated polymer material comprises vinyl chloride, vinyl fluoride, vinylidene chloride, and vinylidene fluoride, and chlorinated polyvinyl chloride, chlorinated polyethylene or mixtures thereof;
- b) greater than 0.3 phr of a monomethyl tin stabilizer;
- and c) 0.01 to 5 phr of a salt of a polyacid material.
Dependencies are inferred from the claim text.