申请人:Ciba-Geigy Corporation
公开号:US03993655A1
公开(公告)日:1976-11-23
Esters of 2,2,6,6-tetramethylpiperidinols with mono- or bis-hydroxybenzylmalonic acids are powerful stabilizers for organic polymers, especially for polyolefins. They protect the polymers against thermal-oxidative degradation as well as against light-induced aging. Similar activity show the corresponding amides of hydroxybenzylmalonic acids. The esters and the amides can be prepared by analogous processes.
2,2,6,6-四甲基哌啶醇与单羟基或双羟基苯甲酸丙二酸酯是有机聚合物的强效稳定剂,特别是对于聚烯烃。它们可以保护聚合物免受热氧化降解和光老化的影响。羟基苯甲酸丙二酸的相应酰胺也具有类似的活性。这些酯和酰胺可以通过类似的过程制备。