Process for producing polyimide-amide-carboxylic acid

Details Process for producing polyimide-amide-carboxylic acid Process for producing polyimide-amide-carboxylic acid

1980-04-10

1982-07-06

Cockeram, H. S.

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 48, 528 49, 528 51, 528 52, 528 73, C08G 1832, C08G 1830

Patent

active

043384277

ABSTRACT:
Polyimide-amide-carboxylic acids produced by reacting an aromatic diamine with an aromatic tetracarboxylic acid dianhydride in amounts of 1.5 to 2.0 moles of the latter per mole of the former in the presence of an inert solvent, and reacting the resulting intermediate reaction product with an aromatic diisocyanate in about equivalent amounts at a temperature of 50.degree. to 100.degree. C. while removing generated carbon dioxide from the reaction system are good in heat resistance, wear resistance, chemical resistance, etc.

REFERENCES:
patent: 3716519 (1973-02-01), Yoda et al.
patent: 3817926 (1974-06-01), Pauze et al.
patent: 3959233 (1976-05-01), Hanson et al.
patent: 4026833 (1977-05-01), D'Alelio
patent: 4160753 (1979-07-01), Lorenz et al.

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