Amide-imide copolymer resin of lowered water absorption and...

Details Amide-imide copolymer resin of lowered water absorption and... Amide-imide copolymer resin of lowered water absorption and...

C - Chemistry, Metallurgy

08

G

402/221, 400/770

C08G 73/14 (2006.01)

Patent

CA 2021929

ABSTRACT OF THE INVENTION Polyamide-imide matrix resins derived from trimellitic acid compounds and an aromatic diamine are improved in moisture resistance when from 10 to about 90 mole % of the trimellitic acid compounds are replaced by biphenyl tetracarboxylic acid compounds. The matrix resins are particularly useful for fiber-filled composites having improved retention of properties when exposed to moisture. 28,168 EP

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