| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rubber-reinforced thermoplastic resin composition which has an excellent balance between impact resistance and flowability. <P>SOLUTION: The rubber-reinforced thermoplastic resin composition includes a copolymer (A) obtained by copolymerizing a monomer mixture (a) containing at least an aromatic vinyl monomer (a1) and a vinyl cyanide monomer (a2), and a graft copolymer (B) obtained by graft-polymerizing a monomer mixture (b) containing at least an aromatic vinyl monomer (b1) and a vinyl cyanide monomer (b2) in the presence of rubbery polymer, wherein the proportion of component having a molecular weight of less than 50,000 within an acetone soluble component relative to the total weight of acetone soluble component is less than 30 wt.% and the proportion of component having a molecular weight of 250,000 or more is 5-15 wt.%, and a molecular weight distribution (Mw/Mn) shown by the ratio of a weight average molecular weight (Mw) of acetone soluble component to a number average molecular weight (Mn) is in a range of 1.5-2.5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
