Abstract: Thermoplastic molding compositions consist of:(a) 10-90% by weight copolymer of maleimide and styrene containing about 5-35% maleimide and 60-95% styrene; and(b) 10-90% by weight of a polycarbonate of a dihydric phenol and a derivative of carbonic acid.

Abstract: Thermoplastic molding compositions consist of a blend of:A. 10-90% by weight of a polycarbonate of a dihydric phenol and a derivative of carbonic acid.B. 10-90% by weight copolymer of three components:(aa) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkyldiene,(bb) an amino nitrogen derivative of an ethylenically unsaturated dicarboxylic acid, and(cc) vinyl aromatic composition,Said copolymer containing from about 5% to about 35% rubbery block polymer, from about 5% to about 35% amino nitrogen derivative of an ethylenically unsaturated dicarboxylic acid, and from about 60% to 90% vinyl aromatic composition.