Polyamide-polyimide block copolymers soluble in aprotic dipolar

Details Polyamide-polyimide block copolymers soluble in aprotic dipolar Polyamide-polyimide block copolymers soluble in aprotic dipolar

1990-01-25

1992-05-26

Carrillo, Ana L.

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

Synthetic resins

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

525436, 428422, 4284235, 428426, 428443, 428458, 4284735, C08L 7908, B32B 2708

Patent

active

051169134

ABSTRACT:
A process for the preparation of crosslinked polymers by heating selected polyamide-polyimide block copolymers having an average molecular weight M.sub.n of 1,000-50,000 is described. In the compounds, at least 10 mol % of alkyl-substituted diaminodiphenylmethane groups, relative to the total amount of diamine radicals in the polyamide and polyimide blocks, are co-condensed.
The uncrosslinked compounds are soluble in dipolar, aprotic solvents.

REFERENCES:
patent: 3894114 (1975-07-01), Lohmann et al.
patent: 4503285 (1985-03-01), Darms et al.
patent: 4657832 (1987-04-01), Pfeifer
C.A. 107:134873 (1987).
C.A. 109:74163.

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