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专利名称：Process of preparing polyamides and/or
polyimides
发明人：Kouno, Masahiro,Mizutani, Kazumi,Osawa,
Masanori,Shizuka, Kohei,Toyoda,Toshihiro,Nakano- Hiromi
申请号：EP86301010申请日：19860214公开号：EP0194058A3公开日：19870722
摘要：A polyamide and/or polyimide is prepared by using N,N'- dimethylethyleneureaor N,N'-dimethylpropyleneurea as a solvent for polycondensation of a polycarboxylicacid and a diisocyanate at a temperature above 100°C in the presence of an alkali metalcarbonate, alkali metal hydrogencarbonate, alkali metal hydroxide or an alkali metal saltof a polycarboxylic acid. Where an alkali metal salt of a polycarboxylic acid is employed,the salt is preferably of an acid having the same or a similar structure to thepolycarboxylic acid participating in the polycondensation reaction.
申请人：MITSUI TOATSU CHEMICALS, Inc.
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