Polyimides and process for the preparation thereof

Details Polyimides and process for the preparation thereof Polyimides and process for the preparation thereof

C - Chemistry, Metallurgy

08

G

402/221

C08G 73/10 (2006.01)

Patent

CA 2001496

The present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carring out condensation of 4,4'- bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a diamine compound and/or tetracarboxylic acid dianhydride. The polyimides have a non-crystalline structure and exhibit excellent thermal resistance and processability.

Polyimides possédant une excellente résistance thermique; méthode pour les préparer, par condensation de 4,4'- bis(3-aminophénoxy)biphényle avec le dianhydride pyromellitique en présence d'un composé diaminé et (ou) d'un dianhydride d'acide tétracarboxylique. Les polyimides ont une structure non cristalline et offrent d'excellentes propriétés de résistance thermique et de transformabilité.

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