Production method null of modifier and chip resistance polystyrene resin composition for polystyrene type resin

摘要

PURPOSE:To obtain an impact-resistant polystyrene resin composition improved in mold release in molding, abrasion resistance, lubricity, etc., by reacting a maleic anhydridemodified PS elastomer with a polysiloxane reactive therewith in the presence of PS or a styrene copolymer resin. CONSTITUTION:5-30wt.% maleic anhydride-modified PS elastomer (A) prepared by selectively hydrogenating the polybutadiene segment of a styrene/butadiene block copolymer desirably having at least one PS segment and at least one polybutadiene segment and graft-modifying the product with maleic anhydride is reacted by melt kneading with 5-50wt.% polysiloxane (B) desirably having an amino-containing substituent on at least either end and a group reactive with component A in the presence of 20-90wt.% PS or styrene copolymer resin (C).