| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermoplastic polymer composition excellent in all of flowability (moldability), tensile break strength and weld strength. SOLUTION: This thermoplastic polymer composition includes (a) a block copolymer having a polymer block A mainly consisting of anα-methylstyrene unit and a polymer block B mainly consisting of a conjugated diene unit and/or a hydrogenation product thereof, and (b) a hydrogenation product of a block copolymer having a polymer block A' mainly consisting of an aromatic vinyl compound unit other than theα-methylstyrene unit and a polymer block B' mainly consisting of a conjugated diene unit, wherein a number-average molecular weight of the block copolymer (a) or a hydrogenation product thereof is 30,000 to 350,000, and a number-average molecular weight of the block copolymer (b) or a hydrogenation product thereof is 100,000 to 500,000. COPYRIGHT: (C)2010,JPO&INPIT
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