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

摘要

A polyamino-bis-maleimide prepolymer solution obtained by the reaction of 1 mole of N,N'-4,4'-diphenyl methane-bis-maleimide with 0.25 to 0.4 mol of 4,4'-diaminodiphenyl methane in an alkyleneglycol monoalkyl ether as a solvent at elevated temperatures. This solution can be impregnated with a substrate to form a prepreg. The prepreg can be laminated to form heat resistant laminate.