申请人:Ciba-Geigy Corporation
公开号:US04001299A1
公开(公告)日:1977-01-04
The compounds are esters having the formula ##EQU1## wherein R.sub.1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, R.sub.2 is the group ##SPC1## R.sub.3 is hydrogen, alkyl, cycloalkyl or .alpha.-methylbenzyl, R.sub.4 is alkyl or cycloalkyl, R.sub.5 is hydrogen or alkyl, provided when R.sub.3 is hydrogen, R.sub.5 is alkyl and R.sub.4 is located on the carbon atom ortho to the hydroxyl group, A is a covalent carbon bond or lower alkylene, Q is the group ##SPC2## R.sub.6 and R.sub.7 are independently hydrogen or alkyl, and Z is oxygen or sulfur. The esters of this invention are prepared by usual esterification procedures from a substituted isopropanol and an acid or a derivative thereof, preferably the methyl ester. The substituted isopropanols are prepared by the reaction of bis-glycidyl ethers of polyhydric phenols or of 1,3-diglycidyl derivatives of hydantoin with a mercaptide or alkoxide. The compounds are useful as stabilizers for organic materials, especially polyolefins, which degrade upon exposure to light and heat.
这些化合物是具有以下结构的酯类化合物:其中R.sub.1是烷基、环烷基、烷基硫乙基或烷基聚氧烷基,R.sub.2是基团,R.sub.3是氢、烷基、环烷基或α-甲基苄基,R.sub.4是烷基或环烷基,R.sub.5是氢或烷基,如果R.sub.3是氢,则R.sub.5是烷基且R.sub.4位于对羟基的碳原子上,A是共价碳键或较低的烷基,Q是基团,R.sub.6和R.sub.7独立地是氢或烷基,Z是氧或硫。本发明的酯类化合物是通过通常的酯化程序从取代异丙醇和酸或其衍生物,首选是甲酸甲酯制备的。取代异丙醇是通过双环氧乙烷酚或1,3-双环氧乙烷基咪唑啉的反应与巯基或烷氧基制备的。这些化合物可用作有机材料的稳定剂,特别是在光照和热作用下会降解的聚烯烃的稳定剂。