Patent ID: 7772319
Filing Date: 2010-08-10
Classification: B32B,C08L

Abstract:
1. A thermoplastic elastomer composition comprising: (a) a styrene-based block copolymer having a number average molecular weight of 70,000 or more formed by hydrogenation of a block copolymer having at least two terminal polymer blocks (A1) comprising a vinyl aromatic compound unit, and at least one intermediate polymer block (A2) comprising a conjugated diene compound unit; (b) an acrylic block copolymer comprising at least one polymer block (I) and at least one polymer block (II), the at least one polymer block (I) comprising an acrylic ester-based polymer (B1), and the at least one polymer block (II) comprising an acrylic ester-based polymer (B2) having a different structure from the acrylic ester-based polymer (B1), or a methacrylic acid ester-based polymer (B3); and (c) a block copolymer comprising a hydrophilic group; wherein: the acrylic block copolymer (b) is present in an amount of 2 to 1,000 parts by mass relative to 100 parts by mass of the styrene-based block copolymer (a); and the block copolymer (c) is present in an amount of 3 to 100 parts by mass relative to 100 parts by mass of the styrene-based block copolymer (a).