| 摘要 |
A polymer composition comprising at least one addition polymer type block copolymer (a) having a weight-average molecular weight of 30000 to 200000 which is selected from among block copolymers each comprising one or more polymer block (A) composed mainly of aromatic vinyl units containing at least 1% by mass of structural units (I) derived from an alkylstyrene having at least one C1-8 alkyl group bonded to the benzene ring and one or more polymer block (B) composed mainly of conjugated diene units and products of hydrogenation of the block copolymers, an acrylic resin (b), and a softener (c) in proportions (by mass) satisfying the relationships [1] and [2]: 0.05 < Wb/Wa < 2 [1] Wc/(Wa + Wb + Wc) <0.5 [2] [wherein Wa, Wb, and Wc are the contents (by mass) of the block copolymer (a), the acrylic resin (b), and the softener (c)]. The polymer composition is excellent in processability in molding, softness, rubber elasticity, mechanical characteristics, and transparency as well as in mar resistance and wear resistance, thus being effectively usable in a wide field by virtue of such properties.
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