Novel polyimides substituted by a substituent having an alkyl or fluoroalkyl group and having reduced water absorption; a process for producing these novel polyimides; and novel acid dianhydrides to be used in the production thereof.
A polyimide containing a structure represented by the following general formula (I):
wherein X1 represents a tetravalent organic group having a substituent —R1AR2 (wherein A represents a divalent linkage group; R1 represents a single bond or a C1-3 alkylene group; and R2 represents a C1-25 alkyl group or a fluoroalkyl group); and Y represents a divalent organic group.
新型多
亚胺聚合物,其取代基具有烷基或氟烷基,且具有降低吸
水性能;制备这些新型多
亚胺聚合物的方法;以及用于制备这些新型多
亚胺聚合物的新型酸二酐。其中,多
亚胺聚合物包含以下通式(I)所表示的结构:其中X1表示具有取代基—R1AR2的四价有机基团(其中A表示二价连接基团;R1表示单键或C1-3烷基;R2表示C1-25烷基或氟烷基);Y表示二价有机基团。