申请人:TOMOEGAWA PAPER CO. LTD.
公开号:EP0729996A1
公开(公告)日:1996-09-04
The present invention provide a novel polyimide which is soluble in organic solvents and excels in heat resistance, and to a process for producing the polyimide. The polyimide of the present invention comprises a repeating unit represented by the formula (1) and having a number average molecular weight of from 4,000 to 200,000.
wherein X is -SO2- or -C(=O)-OCH2CH2O-C(=O)-, and R1, R2, R3 and R4 are independently an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
本发明提供了一种可溶于有机溶剂且耐热性能优异的新型聚酰亚胺,以及生产这种聚酰亚胺的工艺。本发明的聚酰亚胺包括由式(1)表示的重复单元,其平均分子量为 4000 至 200000。
其中 X 是-SO2-或-C(=O)-OCH2CH2O-C(=O)-,R1、R2、R3 和 R4 独立地是具有 1 至 4 个碳原子的烷基或具有 1 至 4 个碳原子的烷氧基。