申请人:Ciba-Geigy Corporation
公开号:US05356976A1
公开(公告)日:1994-10-18
Compounds of formula I ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.4 n-alkyl, isopropyl, s-butyl, cyclopentyl, cyclohexyl or .alpha.-methylbenzyl, R.sub.2 is C.sub.4 -C.sub.18 tert-alkyl or .alpha.,.alpha.-dimethylbenzyl, R.sub.3 is C.sub.1 -C.sub.28 alkyl, and R.sub.4 s methyl or ethyl, with the proviso that the --CHR.sub.3 R.sub.4 group contains at least 4 carbon atoms, are suitable for stabilizing organic material which is susceptible to degradation induced by heat, oxidation or actinic light.
式I的化合物 ##STR1## 其中R.sub.1是C.sub.1-C.sub.4正烷基、异丙基、s-丁基、环戊基、环己基或α-甲基苄基,R.sub.2是C.sub.4-C.sub.18叔烷基或α,α-二甲基苄基,R.sub.3是C.sub.1-C.sub.28烷基,R.sub.4是甲基或乙基,但需要注意的是,--CHR.sub.3R.sub.4基团至少含有4个碳原子,适用于稳定易受热、氧化或光降解的有机材料。