THERMOPLASTIC ELASTOMER COMPOSITION AND FORMED ARTICLE THEREOF

摘要

A thermoplastic elastomer composition which comprises 100 parts by weight of (i) a polyolefin-based resin and 10 to 1000 parts by weight of (ii) a hydrogenated diene-based copolymer, and satisfies the following requirements: (1) the copolymer (ii) contains structural units of (A) a vinyl aromatic compound polymer block and (B) a block having a structure obtained by hydrogenation of a specific copolymer containing a unit derived from a conjugated diene; (2) the copolymer (ii) has a total content (T) of units derived from vinyl aromatic compounds of 10 to 18 wt.%; (3) the copolymer (ii) has a percentage (S) of a content of the unit (A) described in (1) to the above total content of units derived from vinyl aromatic compounds of 3 % or more; (4) the copolymer (ii) has a proportion (V) of the number of hydrogenated conjugated diene units having a side chain containing two or more carbon atoms to the number of the hydrogenated conjugated diene units of 60 % or more; (5) the copolymer (ii) satisfies the formula: V