Sulfide containing tin stabilizers
AssigneeCincinnati Milacron Chemicals, Inc.
InventorThomas G. Kugele
Life of this patent
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Abstract
A polyvinyl chloride resin stabilizer is provided having a high concentration of tin, in the range from about 10% to about 42% by weight, and a high concentration of sulfur, within the range from about 8% to about 42% sulfur, comprising at least one monoorganotin or diorganotin mercapto alkanol carboxylic ester (or mercapto alkyl carboxylate), mono or poly sulfide and preferably mixed monoorganotin and diorganotin mercaptoalkyl carboxylic acid ester sulfides, especially having 4 to 50% of the diorganotin compound. Polyvinyl chloride resin compositions are also provided, containing these compounds.
Claims61
A monoorganotin or diorganotin mercaptoalkyl ester of a carboxylic acid or mercapto hydroxyalkyl ester of a carboxylic acid mono or poly sulfide useful as a stabilizer for improving the resistance to deterioration of vinyl chloride polymers when heated at 350.degree. F, containing at least one tin atc having one to two hydrocarbyl groups having from 1 to 20 carbon atoms and selected from the group consisting of alkyl, aryl, cycloalkyl, aralkyl and alkenyl and linked to the tin through carbon, at least one mercaptoalkyl ester of a carboxylic acid group linked to tin through the sulfur of the mercaptoalkyl group and at least one mono or polysulfide sulfur group bonded exclusively to tin, the organotin compound having an amount of tin within the range from 10 to 42% by weight and an amount of sulfur within the range from 8 to 42% by weight.
An organotin compound which is a bis[(monoalkyltin) bis merceptoalkylester of a carboxylic acid)] oxide or a bis[(monoalkylmonohalotin) mono(mercaptoalkylester of a carboxylic acid)] oxide.
Dependencies are inferred from the claim text.