TRANSPARENT RUBBER-MODIFIED COPOLYMER RESIN AND RESIN COMPOSITION CONTAINING THE SAME

摘要

The invention provides a rubber−modified copolymer resin which is excellent in transparency, impact resistance and rigidity and is reduced in the dependence of transparency on molding conditions, and a rubber−modified copolymer resin composition which has the above characteristics and exhibits high practical strength, specifically, a transparent rubber −modified copolymer resin obtained by polymerizing a styrenic monomer and a (meth)acrylic ester monomer in the presence of a rubbery polymer, characterized in that the volume mean diameter of rubber particles dispersed in the resin is 0.4 to 2.0 μm and that in the cumulative rubber particle size distribution curve by volume, the difference between the diameter at an integrated value of 75% and that at an integrated value of 25% is 0.2 to 2.0 μm, and a rubber−modified copolymer resin composition comprising 60 to 99.9 % by mass of the above rubber−modified copolymer resin (A) and 0.1 to 40 % by mass of an emulsion graft copolymer (B).