Organotin mercapto dicarboxylic acid esters and compositions

Details Organotin mercapto dicarboxylic acid esters and compositions Organotin mercapto dicarboxylic acid esters and compositions

C - Chemistry, Metallurgy

07

F

400/9018, 400/92

C07F 7/22 (2006.01) C08K 5/38 (2006.01) C08K 5/58 (2006.01)

Patent

CA 1055955

ABSTRACT OF THE DISCLOSURE Organotin mercapto dicarboxylic acid esters are provided having either substantially no odor or a remarkably low odor, and capable of imparting to polyvinyl chlorine resin compositions when heated at elevated temperatures an enhanced resistance to early dis- coloration 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 discolora- tion, without any obnoxious mercaptide odor.

268786

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