RUBBER-MODIFIED STYRENIC RESIN COMPOSITION AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain the subject composition having excellent balance between impact strength and rigidity and excellent in gloss. SOLUTION: This resin composition comprises dispersed particles of a rubbery polymer with a weight-average particle diameter in a range of 0.4-0.9μm dispersed in a styrenic resin matrix, wherein the content of the dispersed particles having >=1.2μm particle diameter is <=5wt.% and the content having <=0.2μm particle diameter is <=5wt.% respectively based on the whole particles. A ratio of a toluene-insoluble component to a rubber component contained in the composition is in a range of 1.2-2.5 (the former/the latter) and a silicone oil is contained in the composition in an amount of 0.005-0.5wt.%.