Organotin mercaptoalkanol esters and alkoxides containing sulfide groups
AssigneeM&T Chemicals Inc.
InventorsRobert D. Dworkin, William A. Larkin
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Abstract
This invention relates to novel organotin compounds containing at least one sulfur atom that is bonded exclusively to tin or to tin and hydrogen. The compounds are derivatives of mercaptoalkanols, which are present as the free alcohols, as esters of polycarboxylic acids, esters of acids containing specified non-metallic elements or as alkoxides of specified metallic elements. The compounds are effective catalysts for a variety of reactions and impart heat stability to halogen-containing resins.
Claims20
An organotin compound containing
- (a) at least one tin atom having one or two hydrocarbyl, carboalkoxyhydrocarbyl or ketohydrocarbyl groups bonded to tin through carbon, wherein any alkyl portion of said groups contains from 1 to 20 carbon atoms;
- (b) at least one mercaptoalkanol residue bonded to tin through the sulfur atom of said residue, the oxygen atom of said residue being bonded to hydrogen, to a hydrocarbyl group, to the residue obtained by removal of the hydroxyl portion of the one carboxy (--COOH) group of a polycarboxylic or hydroxypolycarboxylic acid, or to an element selected from the group consisting of aluminum, boron, phosphorus, silicon and titanium, with the proviso that any polycarboxylic acid is bonded to at least two mercaptoalkanol residues through an oxygen atom of said residue and a carboxyl group of said polycarboxylic acid;
- (c) at least one oxygen or sulfur atom, said atom being bonded exclusively to tin or to tin and hydrogen, or at least one polysulfide group that is bonded exclusively to tin;
- (d) up to 52% by weight of tin and
- (e) up to 63% by weight of sulfur.
A heat stabilized vinyl chloride polymer composition comprising a vinyl chloride polymer and an amount of an organotin compound sufficient to impart resistance to heat-induced degradation to said vinyl chloride polymer wherein the organotin compound contains
- (a) at least one tin atom having one or two hydrocarbyl, carboalkoxyhydrocarbyl or ketohydrocarbyl groups, bonded to tin through carbon, wherein any alkyl portion of said groups contains from 1 to 20 carbon atoms;
- (b) at least one mercaptoalkanol residue bonded to tin through the sulfur atom of said residue, the oxygen atom of said residue being bonded to hydrogen, to a hydrocarbyl group, to the residue obtained by removal of the hydroxyl portion of one carboxy (-COOH) group of a polycarboxylic or hydroxypolycarboxylic acid, or to an element selected from the group consisting of aluminum, boron, phosphorus, silicon and titanium;
- (c) at least one oxygen or sulfur atom, said atom being bonded exclusively to tin or to tin and hydrogen, or at least one polysulfide group that is bonded exclusively to tin;
- (d) up to 52% by weight of tin and
- (e) up to 63% by weight of sulfur.
Dependencies are inferred from the claim text.