Halogenated polyimide resins prepared by addition reactions,申请号US19920824090-传众专利搜索

Halogenated polyimide resins prepared by addition reactions

申请公布号：US5149772(A)

申请号：US19920824090

申请日期：1992.01.22

申请公布日期：1992.09.22

申请人：

TRW INC.

发明人：SERAFINI, TITO T.;CHENG, PAUL G.;UEDA, KENNETH K.;WRIGHT, WARD F.

分类号：C08L79/08;C07D405/14;C08F290/00;C08F299/02;C08G73/10;C08G73/12

主分类号：C08L79/08

摘要：Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or tetraalkylester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, and (c) an end cap compound. The ratio of (a), (b), and (c) is chosen so that upon heating the mixtures, low molecular weight prepolymers are formed, the prepolymers having only one end cap radical and being suitable for chain extension and crosslinking to form high molecular weight, thermally stable polyimides. Upon heating, the prepolymers form polyimide resins, which can have Tg in excess of 600 DEG F. and superior physical properties.