| 摘要 |
NEW MATERIAL:The compound of formula I (R1 is methyl or ethyl; R2 is 2-3C alkyl; R3 is 10-20C alkyl). EXAMPLE:6-t-Butyl-2-[ 1-( 3-t-butyl-2-hydroxy-5-methylphenyl )butyl ]-4-methylphenol 4-thiadocosanoate. USE:Agent for preventing the deterioration of organic substances. Especially useful for the prevention of thermal and oxidative degradation of natural and synthetic polymers. PROCESS:The compound of formula I can be prepared by reacting the bisphenol monoacrylate compound of formula II with the 10-20C alkanethiol (e.g. dodecanethiol, n-hexadecanethiol, etc.) in a solvent such as chloroform, preferably in the presence of a basic catalyst such as sodium methoxide, etc. |
