Acid-extended copolyamideimides and method for their preparation

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

1983-09-15

1984-11-06

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525428, 525432, 525436, 528 26, 528 73, 528 74, 528 84, 528185, 528188, 528352, 528353, C08G 7314

Patent

active

044813392

ABSTRACT:
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 acid, or functional derivatives thereof, with a diisocyanate or diamine, preferably an aromatic diisocyanate.

REFERENCES:
patent: 4225686 (1980-09-01), Onder et al.
patent: 4258155 (1981-03-01), Holub et al.
patent: 4332929 (1982-06-01), Holub et al.

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