Polyamide-polyimide block copolymers soluble in aprotic dipolar solvents

摘要

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.PPThe uncrosslinked compounds are soluble in dipolar, aprotic solvents.