Polyimide and a method of preparing polyamide from

专利名称：Polyimide and a method of preparing

polyamide from tetracarboxylic dianhydrideand diisocyanate

发明人：John N. Hay,Barry Woodfine申请号：US08/413271申请日：19950330公开号：US05614607A公开日：19970325

摘要：The invention provides a method of preparing a polyimide by reacting togethera dianhydride and a diisocyanate or equivalent, the polyimide having repeating units ofthe general formula (I): ##STR1## in which D is a group comprising one or more aromaticrings, to which the imide carbon atoms are directly bonded, and

E is a group comprising one or more cycloaliphatic or aromatic rings, to which theimide nitrogen atoms are bonded directly or via an aliphatic group, provided that theimide nitrogen atoms are not bonded directly to an aromatic ring. Such polyimide iscolourless or of low colour.

申请人：KABUSHIKI KAISHA KOBE SEIKO SHO

代理机构：Oblon, Spivak, McClelland, Maier & Neustadt, P

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