申请人:Ciba-Geigy Corporation
公开号:US04309546A1
公开(公告)日:1982-01-05
Pyrrolidiones of the formula I ##STR1## wherein n is 1, 2, 3 or 4, R.sub.1 is free or esterified hydroxyl or hydroxyl which has been converted to a salt or is substituted or unsubstituted amino, X is a direct bond or a linking member and Pip is a substituted or unsubstituted 2,2,6,6-tetraalkylpiperidin-4-yl or a 2,2,6,6-tetraalkylpiperidin-4-ylidene, which pyrrolidones can be oligomerized or polymerized by linking R.sub.1 with X or by linking R.sub.1 with Pip. These compounds are used as light stabilizers for polymers.
式I的吡咯烷酮 ##STR1## 其中n为1、2、3或4,R.sub.1为自由或酯化的羟基或已转化为盐的羟基,或取代或未取代的氨基,X为直接键或连接成员,Pip为取代或未取代的2,2,6,6-四烷基哌啶-4-基或2,2,6,6-四烷基哌啶-4-基亚烷基,这些吡咯烷酮可以通过将R.sub.1与X连接或将R.sub.1与Pip连接而被寡聚或聚合。这些化合物用作聚合物的光稳定剂。