PRODUCTION OF THERMOPLASTIC RESIN COMPOSITION

摘要

PURPOSE:The cyclization of a maleimide copolymer by dehydration and the phase transition of a rubber-modified graft copolymer are simultaneously effected to produce a composition with high impact resistance and heat resistance through a simplified process. CONSTITUTION:A modified vinyl copolymer that is obtained by allowing a vinyl copolymer containing 5-50mol% of maleic anhydride to react with ammonia or a primary amine in an organic solvent, and a graft copolymer that is obtained by suspension polymerization 40-95wt% of a monomer mixture consisting of an aromatic vinyl monomer and other vinyl monomers copolymerizable therewith in the presence of 5-60wt% of a rubber polymer substantially free from gel are mixed so that the content of the rubber polymer becomes 5-40wt% based on both components, then they are melt mixed under shear stress at 150-350 deg.C.