申请人:KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0209114A2
公开(公告)日:1987-01-21
An amphiphilic polyimide precursor having the recurring unit of the formula (1):
wherein R' is a tetravalent group having at least 2 carbon atoms, R2 is a bivalent group having at least 2 carbon atoms, and R3, R4, R5 and R6 are hydrogen atom or a monovalent group having 1 to 30 carbon atoms selected from an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an alicyclic group or an aromatic group, and their groups substituted by a halogen atom, nitro group, amino group, cyano group, methoxy group or acetoxyl group, provided that at least one, peferably at least two, of R3, R4, R5 and R6 are not hydrogen atom and a group having 1 to 11 carbon atoms, the polyimide precursor being able to form a built-up film on substrates according to the Langmuir-Blodgett technique and being able to be converted into polyimide by heat treatment to provide a ultrathin film of polyimide having a thickness of not more than 10 000 A and excellent heat resistance, chemical resistance, mechanical property and electric characteristics.
一种具有式(1)重复单元的两亲性聚酰亚胺前体:
其中 R'为至少具有 2 个碳原子的四价基团,R2 为至少具有 2 个碳原子的二价基团,R3、R4、R5 和 R6 为氢原子或具有 1 至 30 个碳原子的单价基团,这些基团选自脂族基团、脂环族基团、芳香族基团、脂族基团与脂环族基团或芳香族基团结合的基团,以及被卤素原子、硝基、氨基、氰基、甲氧基或乙酰氧基取代的基团、只要 R3、R4、R5 和 R6 中至少一个(最好至少两个)不是氢原子和具有 1 至 11 个碳原子的基团,聚酰亚胺前体就能根据 Langmuir-Blodgett 技术在基底上形成堆积膜,并能通过热处理转化为聚酰亚胺,从而提供厚度不超过 10 000 A 的超薄聚酰亚胺膜,并具有优异的耐热性、耐化学性、机械性能和电气特性。