Copolymers of polyparabanic acids and polyamide-imides

Details Copolymers of polyparabanic acids and polyamide-imides Copolymers of polyparabanic acids and polyamide-imides

1977-07-05

1978-08-22

Welsh, M. J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 44, 528 84, 528 68, C08G 1800

Patent

active

041088433

ABSTRACT:
Random copolymers of polyparabanic acids and polyamide-imides are described. The copolymers are highly useful engineering thermoplastics which, unlike the corresponding polyparabanic acid homopolymers, are readily moldable by compression molding and like techniques. The copolymers are readily prepared by the one-shot reaction of bis(alkoxyoxalyl)amides of aliphatic, araliphatic or aromatic diamines, with organic diisocyanates and trimellitic anhydride.

REFERENCES:
patent: 3591562 (1971-07-01), Patton
patent: 3609113 (1971-09-01), Schade et al.
patent: 3901847 (1975-08-01), Johnson et al.
patent: 3933758 (1976-01-01), Patton
patent: 3939116 (1976-02-01), Johnson et al.
patent: 3969290 (1976-07-01), Kraft et al.
patent: 4005056 (1977-01-01), Dunwald et al.

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