申请人:Japan Science and Technology Corporation
公开号:EP1167422A1
公开(公告)日:2002-01-02
A process by which a polyamide, polyimide, or polyamide-imide capable of being easily purified after reaction, especially an aromatic polyamide (aramid), aromatic polyimide, or aromatic polyamide-imide, which is difficult to synthesize by direct polycondensation, is produced in high yield from a polycarboxylic acid and a polyamine by direct polycondensation with heating while inhibiting side reactions, e.g., one accompanied by a color change into black. An aromatic dicarboxylic acid, aromatic tetracarboxylic acid, or aromatic tricarboxylic acid is condensation-polymerized with an aromatic diamine using an arylboric acid, e.g., 3,4,5-trifluorophenylboric acid, as a polycondensation catalyst in the presence of either a mixed solvent comprising pentamethylbenzene and N-methylpyrrolidinone or a mixed solvent comprising m-terphenyl and N-butylpyrrolidinone to obtain a polyamide, polyimide, or polyamide-imide in high yield.
一种在反应后易于提纯的聚酰胺、聚
酰亚胺或聚酰胺-
酰亚胺,特别是难以通过直接缩聚反应合成的芳香族聚酰胺(芳纶)、芳香族聚
酰亚胺或芳香族聚酰胺-
酰亚胺,通过加热直接缩聚反应,同时抑制副反应(如伴随颜色变黑的副反应),以高产率从聚
羧酸和
多胺制得的工艺。芳香族二
羧酸、芳香族四
羧酸或芳香族
三羧酸与芳香族二胺使用芳基
硼酸(如 3,4,5-三
氟硼酸)进行缩合聚合、3,4,5-三
氟苯硼酸作为缩聚催化剂,在由
五甲基苯和
N-甲基吡咯烷酮组成的混合溶剂或由
间三联苯和 N-丁基
吡咯烷酮组成的混合溶剂存在下,与芳香族二胺进行缩合聚合,从而获得高产率的聚酰胺、聚
酰亚胺或聚酰胺-
酰亚胺。