Acid-extended copolyamideimides and method for their...

Details Acid-extended copolyamideimides and method for their... Acid-extended copolyamideimides and method for their...

C - Chemistry, Metallurgy

08

G

402/216, 402/9

C08G 73/14 (2006.01) C08G 18/64 (2006.01) C08G 77/04 (2006.01)

Patent

CA 1217595

NOVEL ACID-EXTENDED COPOLYAMIDES AND METHOD FOR THEIR PREPARATION ABSTRACT OF THE DISCLOSURE Polyamideimides are prepared by first reacting a diamine, preferably an aromatic diamine, with a carboxy anhydride such as trimellitic anhydride and a dianhydride such as bisphenol A dianhydride; and then reacting mixtures of the resulting prepolymers and dicarboxylic acids, or functional derivatives thereof, with a diisocyanate or diamine, preferably an aromatic diisocyanate.

463221

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