RUBBER COMPOSITION, RESIN MODIFIER COMPRISING THE SAME, AND RESIN COMPOSITION

摘要

A rubber composition comprising (A) 2% to 40% by weight of a conjugated diene polymer selected from (A1) a conjugated diene polymer having a vinyl bond content of at least 60% by weight and (A2) a conjugated diene polymer having a vinyl bond content of at least 30% by weight and a coupling ratio of at least 75% by weight, and (B) 98% to 60% by weight of an aromatic vinyl-conjugated diene copolymer having an aromatic vinyl monomer unit content of 25% to 50% by weight is provided, which has well balanced impact resistance and gloss and is less apt to deteriorate in gloss even in a high-temperature environment.