Polyamino-bis-maleimide prepolymer, its manufacture, its use in manufacturing laminates.

摘要

A polyamino-bis-maleimide prepolymer solution is obtained by the reaction of N,N'-4,4'-diphenyl-methane-bis-maleimide 4,4'-diaminodiphenyl methane in a molar ratio of from 1:0.25 to 1:0.4 in an alkyleneglycol monoalkyl ether as a solvent at elevated temperatures. A substrate can be impregnated with this solution to form a prepreg, which can be laminated to form a heat resistant optionally copper clad laminate.