申请人:ENICHEM S.p.A.
公开号:EP0375036A1
公开(公告)日:1990-06-27
Liquid-crystalline, completely aromatic copolyesters are disclosed, which are endowed with a heat stability not lower than 350° C, and are constituted by a succession of repeatitive units containing:
wherein A and B, which can be either equal to, or different, from, each other, can be either -O- or -CO- and one of the following moieties:
in which Ar can be 1,4-phenylene, 2-monosubstituted-1,4-phenylene or 4,4′-diphenylene.
Also copolyesters also containing amidic bonding groups are disclosed.
本发明公开了液晶型完全芳香族共聚聚酯,其热稳定性不低于 350°C,由连续的重复单元构成,这些重复单元包含:
其中,A 和 B 可以相互等同或不同,可以是 -O- 或 -CO- 以及下列分子之一:
其中 Ar 可以是 1,4-亚苯基、2-单取代-1,4-亚苯基或 4,4′-二亚苯基。
此外,还公开了同样含有酰胺键基团的共聚多酯。