A method for stabilizing synthetic thermoplastic materials against thermal degradation
申请人:CIBA-GEIGY AG
公开号:EP0462068A2
公开(公告)日:1991-12-18
The present invention relates to a novel method for stabilizing synthetic thermoplastic materials against thermal degradation, which comprises incorporating in said materials one or more compounds of the formula (I)
in which R₁ is unsubstituted or substituted phenyl, n is e.g. 1, 2 or 3, and, when n is 1, R₂ is e.g. -COR₃, - COOR₄ or -CO-N(R₅)R₆ in which R₃ is e.g. C₄-C₁₇alkyl, R₄ is e.g. C₄-C₁₈alky cyclohexyl or t-butylcyclohexyl, R₅ and R₆ which can be identical or different are e.g. C₂-C₈alkyl or cyclohexyl, and, when n is 2, R₂ is e.g. -CO-R₁₀-OC, -COO-R₁₁-OOC- or -CONH-R₁₂-NHCO- in which R₁₀ is e.g. C₂-C₈alkylene, R₁₁ is e.g. C₄-C₆alkylene and R₁₂ is e.g. C₄-C₆alkylene, and, when n is 3, R₂ is e.g. benzenetricarbonyl.
Several compounds of the formula (I) are new
本发明涉及一种新型方法,用于稳定合成热塑性材料,防止热降解,该方法包括在所述材料中加入一种或多种式 (I) 化合物
其中 R₁ 是未取代或取代的苯基,n 例如是 1、2 或 3,当 n 是 1 时,R₂ 例如是-COR₃、-COOR₄ 或-CO-N(R₅)R₆,其中 R₃ 例如是.g. C₄-C₁₇ 烷基,R₄ 例如是 C₄-C₁₈ 烷基环己基或叔丁基环己基,R₅ 和 R₆ 可以相同或不同。g. C₂-C₈ 烷基或环己基,且当 n 为 2 时,R₂ 例如是-CO-R₁₀-OC、-COO-R₁₁-OOC-或-CONH-R₁₂-NHCO-,其中 R₁₀ 为 e。R₁₁-OOC-或-CONH-R₁₂-NHCO-,其中 R₁₂ 如为 C₂-C₈烷基,R₁₁ 如为 C₄-C₆烷基,R₁₂ 如为 C₄-C₆烷基,当 n 为 3 时,R₂ 如为苯三羰基。
几种新的式 (I) 化合物