Preparation of polyamideimide from diisocyanate wi

专利名称：Preparation of polyamideimide from

diisocyanate with alkali metal lactamatecatalyst

发明人：Besir K. Onder申请号：US05/769312申请日：19770217公开号：US04094864A公开日：19780613

摘要：The use of certain catalysts provide for an improved process for the

preparation of soluble polyimides, polyamides, and polyamideimides. The catalysts arecompounds of formula ##STR1## WHEREIN M represents an alkali metal, and n is aninteger from 2 to 5 inclusive. The improved process comprises reacting organicdiisocyanates with polycarboxylic compounds consisting of tetracarboxylic acids or theintramolecular dianhydrides thereof, tricarboxylic acids or the monoanhydrides thereof,dicarboxylic acids, and mixtures thereof, in the presence of said catalysts. The polymersare obtained in solution at low reaction temperatures and short reaction times therebyavoiding side- reactions which otherwise would be detrimental to polymer molecularweight and ultimate polymer properties.

申请人：THE UPJOHN COMPANY

代理人：James S. Rose,Denis A. Firth

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