| 摘要 |
PURPOSE: A vinyl aromatic hydrocarbon-conjugated diene block copolymer is provided to dramatically improve an impregnation rate of processing oil through a processing oil impregnation improver and to improve compound process productivity by maintaining basic properties of the polymer. CONSTITUTION: A vinyl aromatic hydrocarbon-conjugated diene block copolymer comprises: a vinyl aromatic hydrocarbon-conjugated diene block copolymer in which a number average molecular weight is 5,000~500,000 and a ratio of vinyl aromatic hydrocarbon-conjugated diene monoer is 5:95 ~ 40:60; and a processing oil impregnation enhancer. The processing oil impregnation enhancer is an acrylate polymer with a weight average molecular weight of 1,000~20,000 or a vinyl aromatic hydrocarbon-acrylate copolymer.
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