Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-01-02
1977-11-15
Sneed, Helen M. S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
252406, 2604297, C08K 558, C08K 536
Patent
active
040585433
ABSTRACT:
Organotin mercapto dicarboxylic acid esters are provided having either substantially no odor or a remarkably low odor, and capable of imparting to polyvinyl chloride resin compositions when heated at elevated temperatures an enhanced resistance to early discoloration as well as an enhanced resistance to long term discoloration, without any obnoxious mercaptide odors.
A process is provided for preparing organotin mercapto carboxylic acid esters by reaction of a monohydric alcohol or mixed monohydric alcohol-glycol mercapto dicarboxylic acid ester with an organotin oxide or halide, and then, if the mercapto dicarboxylic acid ester is of a monohydric alcohol only, transesterifying this reaction product with a glycol.
Polyvinyl chloride resin compositions are also provided containing such organotin mercapto carboxylic acid esters, and having an enhanced resistance to both early and long term discoloration, without any obnoxious mercaptide odor.
REFERENCES:
patent: 2648650 (1953-08-01), Weinberg et al.
patent: 3640953 (1972-02-01), Brecker et al.
patent: 3642677 (1972-02-01), Brecker et al.
patent: 3657294 (1972-04-01), Glaskey
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