Copolyamide-imides

Details Copolyamide-imides Copolyamide-imides

1983-10-03

1984-08-21

Welsh, Maurice 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 67, 528 73, C08G 1834

Patent

active

044670834

ABSTRACT:
Copolyamide-imides characterized by thermoplasticity, high heat resistance and high impact resistance are derived by the reaction of 4,4'-methylenebis(phenyl isocyanate), optionally in admixture with a minor amount (up to 10 mole percent) of toluene diisocyanate (2,4-, 2,6-isomers and mixtures), with a mixture of trimellitic acid or anhydride (30-40 mole percent), isophthalic acid (26-44 mole percent) and a C.sub.7-10 aliphatic dicarboxylic acid (balance of 100 mole percent but not greater than 32 mole percent). These polymers are useful as engineering plastics.

REFERENCES:
patent: 3300420 (1967-01-01), Frey
patent: 3803100 (1974-04-01), Izumi et al.
patent: 3817926 (1974-06-01), Pauze et al.
patent: 3884880 (1975-05-01), Disque et al.
patent: 3929691 (1975-12-01), Allard
patent: 3937673 (1976-02-01), Koemer et al.
patent: 4115372 (1978-09-01), Onder

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