A polyimide resin having a repeating unit of the formula:
wherein R₁ is a tetravalent organic group constituting a tetracarboxylic acid or its derivative, wherein four atoms directly bonded to the four carbonyl groups are carbon atoms having no unsaturated bond, and R₂ is a bivalent organic group constituting a diamine.
一种聚
酰亚胺树脂,具有如下式的重复单元
其中 R₁ 是构成四
羧酸或其衍
生物的四价有机基团,其中与四个羰基直接成键的四个原子是没有不饱和键的碳原子,R₂ 是构成二胺的二价有机基团。