| 摘要 |
A rubber-reinforced thermoplastic resin composition is disclosed. The rubber-reinforced thermoplastic resin composition comprises a thermoplastic resin matrix dispersed therein particles of a graft polymer, the particles of a graft polymer comprising particles of a rubber polymer having emulsion-graft-polymerized to the surface thereof two or more kinds of vinyl compounds copolymerizable with the rubber polymer, wherein the surface graft coverage of the vinyl compounds graft-polymerized to the surface of the particles of a rubber polymer, as determined by equation (m1): surface graft coverage (%) = (s2/s1) x 100, is 80 % or more, and the average thickness of the vinyl compounds graft-polymerized to the surface of the particles of a rubber polymer is from 5 to 25 nm. In said equation, s1 represents the surface area of the particles of a rubber polymer; and s2 represents the surface area of the vinyl compound graft-polymerized to the surface of the particles of a rubber polymer so as to cover the surface of the particles of a rubber polymer.
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