申请人:SUMITOMO BAKELITE COMPANY LIMITED
公开号:EP0997488A1
公开(公告)日:2000-05-03
The present invention provides heat resistant resins excellent in all of electrical characteristics, thermal characteristics, and low water absorption. That is, the present invention provides polybenzoxazole precursors represented by the following general formulas (1), (3) and (5) and polybenzoxazole resins represented by the following general formulas (2), (4) and (6):
wherein n denotes an integer of 2-1000, Rf1 and Rf2 which may be the same or different, denote H or CmF2m+1, with the proviso that at least one of them is CmF2m+1, m denotes an integer of 1-10, and X denotes a divalent organic group.
本发明提供了在所有电气特性、热特性和低吸水性方面都非常出色的耐热树脂。也就是说,本发明提供了由以下通式(1)、(3)和(5)代表的聚苯并恶唑前体和由以下通式(2)、(4)和(6)代表的聚苯并恶唑树脂:
其中 n 表示 2-1000 的整数,Rf1 和 Rf2 可以相同或不同,表示 H 或 CmF2m+1,但其中至少有一个是 CmF2m+1,m 表示 1-10 的整数,X 表示二价有机基团。