申请人:Ciba-Geigy Corporation
公开号:US04177186A1
公开(公告)日:1979-12-04
4-Siloxy-derivatives of sterically hindered piperidines are good light-stabilizers for organic polymers, especially for polyolefins. The stabilizers are added in an amount of from 0.01 to 5% by weight, preferably 0.02 to 1% by weight based on the polymer. The new compounds are obtainable by O-silylation of the corresponding 4-hydroxypiperidines.
4-硅氧基衍生物的立体阻碍哌啶是有机聚合物,特别是聚烯烃的良好光稳定剂。稳定剂的添加量为聚合物重量的0.01至5%,优选为0.02至1%。这些新化合物可以通过相应的4-羟基哌啶的O-硅基化来获得。