Design, Synthesis and AntitumorActivities of Bis-arylureas and Bisarylamides Based on 1H-benzo[d]imidazole Moiety as Novel BRaf <sup>V600E</sub>/VEGFR2 Dual Inhibitors
Design, Synthesis and AntitumorActivities of Bis-arylureas and Bisarylamides Based on 1H-benzo[d]imidazole Moiety as Novel BRaf <sup>V600E</sub>/VEGFR2 Dual Inhibitors
Polyamic acid having three-dimensional network molecular structure, polyimide obtained therefrom and process for the preparation thereof
申请人:Toho Rayon Co., Ltd.
公开号:EP0418889A2
公开(公告)日:1991-03-27
A polyamic acid having a three-dimensional network molecular structure produced by a ring-opening poly-addition reaction of
(A) at least one tetracarboxylic acid dianhydride;
(B) at least one aromatic diamine; and
(C) at least one polyamino compound selected from the group consisting of compounds represented by formula (I) or (II):
n₁ is 0 or an integer from 1 to 4; n₂ is 0 or an integer from 1 to 3; X represents an acid; q represents the base number of the acid; R represents -O-, -CH₂-, -CO- or -SO₂-; and n₃ is 0 or 1; a polyimide derived from the polyamic acid; and a process for preparing a film of the polyamic acid or polyimide.
The polyimide film has superior heat resistance and mechanical characteristics.