| abstract |
A thermoplastic polymer composition containing a ratio of satisfying the following formulae (1) to (3): aromatic vinyl block copolymer (a-1) having a number average molecular weight of 30,000 to 200,000, and an acrylic polymer (a-2) an olefin-based polymer (a-3) containing a polar group, and a softener (a-4), wherein the aromatic vinyl-based block copolymer (a-1) contains Polymer block F mainly composed of a structural unit of a vinyl monomer, and hydrogenated or unhydrogenated polymer block G composed mainly of a structural unit derived from a conjugated diene monomer or an isobutylene monomer, 0.05 ≦ W ( a-2) / W (a-1) ≦ 9 (1)n n n 0.1 <W (a-3) / (W (a-1) + W (a-2) + W (a-3) + W (a-4) ) ≦ 0.9 (2)n n n 0 ≦ W (a-4) / (W (a-1) + W (a-2) + W (a-3) + W (a-4) ) ≦ 0.5 (3)n n n In the formula, W (a-1) , W (a-2) , W (a-3), and W (a-4) each represent an aromatic vinyl-based block copolymer (a -1), the content (mass basis) of the acrylic polymer (a-2), the olefin polymer (a-3) containing a polar group, and the softener (a-4). |