申请人:Mitsui Chemicals, Inc.
公开号:EP1321487A1
公开(公告)日:2003-06-25
Disclosed are a polyamic acid having repeating units represented by the formula (1):
wherein the norbornane skeleton of
comprises four components of
and their contents satisfy the following:1 % ≤ 2,5-[diexo] ≤ 90 %,1 % ≤ 2,5-[exo,endo] ≤ 90 %,1 % ≤ 2,6-[diexo] ≤ 90 %,1 % ≤ 2,6-[exo,endo] ≤ 90 %, provided that(2,5-[diexo]) + (2,5-[exo,endo]) + (2,6-[diexo]) + (2,6-[exo,endo]) = 100 %, R represents from 4 to 27 carbon atoms, and represents a tetravalent group selected from the group consisting of an aliphatic group, a monocyclic aliphatic group, a condensed polycyclic aliphatic group, a monocyclic aromatic group, a condensed polycyclic aromatic group, and a non-condensed polycyclic aliphatic or aromatic group which is composed of cycloaliphatic or aromatic groups mutually bonded to each other either directly or via a crosslinking member; and a polyimide which is obtained by imidizing the polyamic acid and which has good properties intrinsic to polyimides, or that is, thermal resistance, mechanical properties, slidability, low water absorption, electric properties and radiation resistance intrinsic thereto. By varying the composition ratio of the starting diamine isomers, various polyimides having controlled thermal resistance, melt flowability, optical properties, chemical resistance and electric properties and capable of forming films of various forms can be obtained.
本发明公开了一种聚酰胺酸,其重复单元由式(1)表示:
其中降冰片烷骨架
的降冰片烷骨架由以下四个组分组成
其含量满足以下要求:1 % ≤ 2,5-[diexo] ≤ 90 %,1 % ≤ 2,5-[exo,endo] ≤ 90 %,1 % ≤ 2,6-[diexo] ≤ 90 %,1 % ≤ 2,6-[exo,endo] ≤ 90 %,条件是(2,5-[diexo]) + (2,5-[exo,endo]) + (2、(2,6-[exo,endo]) = 100 %,R 代表 4 至 27 个碳原子,并代表选自以下组别的四价基团: 脂肪族基团、单环脂肪族基团、缩合多环脂肪族基团、单环芳香族基团、缩合多环芳香族基团,以及由环脂族或芳香族基团直接或通过交联构件相互结合而成的非缩合多环脂肪族或芳香族基团组成的组;以及一种聚酰亚胺,该聚酰亚胺由聚酰胺酸酰亚胺化而得,具有聚酰亚胺固有的良好性能,即其固有的耐热性、机械性能、滑动性、低吸水性、电性能和耐辐射性。通过改变起始二胺异构体的组成比例,可以获得各种聚酰亚胺,这些聚酰亚胺具有可控的耐热性、熔体流动性、光学性能、耐化学性和电性能,并能形成各种形式的薄膜。