Patent ID: 6310148
Filing Date: 2001-10-30
Classification: C08F,C08L,Y10S

Abstract:
A styrene resin composition having a copolymer (A) of a styrene monomer and an acrylic monomer as a matrix phase, and rubber particles (B) comprising a diene rubbery polymer with which a styrene monomer and an acrylic monomer are graft coplymerized as dispersed particles,wherein the copolymer (A) is a copolymer of the styrene monomer and the (meth)acrylic acid alkyl ester in a proportion of the former/latter=95/5 to 50/50 on a weight basis, the rubber particles (B) have a median diameter in the range of 0.5 to 0.9 .mu.m on a volume basis, the rubber particles (B) include both (B1) rubber particles having a salami structure and (B2) rubber particles having a core-shell structure, the rubber particles (B1) and the rubber particles (B2) as measured by observing 1,000 particles by transmission electron micrograph (magnification: 10,000.times.1) is (B1)/(B2)=70/30 to 95/5, and a value of (toluene-insoluble solids content at 25.degree. C./toluene swelling index at 25.degree. C.) is in the range of 1.2 to 2.5.