BLOCK COPOLYMER RUBBER, RESIN MODIFIER, RESIN COMPOSITION AND METHOD FOR PRODUCING THE SAME RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide an impact-resistant aromatic vinyl resin molded product excellent in impact resistance, gloss and heat stability of gloss and having small dispersion of gloss in the above molded product. SOLUTION: This aromatic vinyl-conjugated diene block copolymer rubber has 50-75 wt.% conjugated diene monomer unit content an 25-50 wt.% aromatic vinyl monomer content and has >=50 wt.% vinyl bond unit in conjugated diene monomer unit and >=70 wt.% aromatic vinyl-conjugated diene block ratio in aromatic vinyl monomer unit. This resin modifier comprises the above aromatic vinyl-conjugated diene block copolymer rubber as an active ingredient. An aromatic vinyl resin modified by using the above resin modifier is used as a molding material.