Method for preparing polyimides for use in electronic applicatio

Details Method for preparing polyimides for use in electronic applicatio Method for preparing polyimides for use in electronic applicatio

1992-10-13

1994-05-10

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D40512

Patent

active

053109333

ABSTRACT:
Polyimides useful in electronic applications are prepared by the reaction of at least one aromatic tetracarboxylic acid or functional derivative thereof with at least one diamine in benzonitrile solution. The preferred tetracarboxylic acid derivative and diamine are 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and bis(4-aminophenyl) sulfone, respectively. A second organic liquid, such as toluene, which is miscible with and has a lower boiling point than benzonitrile and which preferably forms an azeotropic mixture with water, is preferably also present.

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