申请人:CIBA-GEIGY AG
公开号:EP0454622A1
公开(公告)日:1991-10-30
Compounds of formula I
wherein X is a group of formula Ia or Ib,
R₁ and R₂ are independently e.g. hydrogen, alkyl, alkenyl, aryl or phenylalkyl, and R₃ to R₇ are independently e.g. hydrogen, alkyl or substituted alkyl are very effective process stabilizers for polymeric systems providing melt flow stabilization and resistance to discoloration during processing at elevated temperatures as well as effective stabilizers for lubricant compositions.
式 I 的化合物
其中 X 是式 Ia 或 Ib 的基团、
R₁ 和 R₂ 独立地为氢、烷基、烯基、芳基或苯基烷基,以及 R₃ 至 R₇ 独立地为氢、烷基或取代烷基,是非常有效的聚合物体系加工稳定剂,可在高温加工过程中提供熔体流动稳定和抗变色性能,同时也是润滑剂组合物的有效稳定剂。