申请人:——
公开号:US04058543A1
公开(公告)日:1977-11-15
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.
提供了具有几乎没有气味或非常低气味的有机锡巯基二羧酸酯,当在高温下加热时,能够赋予聚氯乙烯树脂组合物对早期变色的增强抵抗力以及对长期变色的增强抵抗力,而不会产生任何令人不快的巯基化合物气味。提供了一种制备有机锡巯基羧酸酯的方法,通过将单元醇或混合单元醇-甘醇巯基二羧酸酯与有机锡氧化物或卤化物反应,然后,如果巯基二羧酸酯仅为单元醇,则将该反应产物与甘醇进行酯交换反应。还提供了含有这种有机锡巯基羧酸酯的聚氯乙烯树脂组合物,具有对早期和长期变色的增强抵抗力,而不会产生任何令人不快的巯基化合物气味。