| 摘要 |
The invention provides a polymer composition containing an addition polymerization-based block copolymer (a), an acrylic resin (b), and a softener (c), wherein the addition polymerization-based block copolymer (a) has a weight average molecular weight of 30000 to 200000 and is at least one selected from block copolymers comprising at least one polymer block A and at least one polymer block B, and hydrogenated products of the block copolymers; the polymer block A essentially comprises an aromatic vinyl compound unit containing at least 1% by mass of an alkylstyrene-derived structural unit (I) in which at least one alkyl group having 1 to 8 carbon atoms is bound to a benzene ring; the block copolymer B comprises a conjugated diene compound unit; and the components of the polymer composition are present in respective proportions (by mass) so that the following relationships (1) and (2) hold: 0.05≦̸Wb/Wa≦̸2  (1) Wc/(Wa+Wb+Wc)≦̸0.5  (2) where Wa, Wb, and Wc are the amounts (by mass) of the components of the polymer composition: the addition polymerization-based block copolymer (a), the acrylic resin (b) and the softener (c), respectively. Not only does the polymer composition of the present invention offer various advantageous properties, including moldability, flexibility, rubber elasticity, mechanical properties, and transparency, but it also exhibits superior scratch resistance and superior abrasion resistance, which make the polymer composition suitable for use in various applications.
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