| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition which is excellent in sealing properties and is prevented from generating a gas such as a volatile low-mol.-wt. component. SOLUTION: This composition comprises (A) 100 pts.wt. hydrogenated block copolymer prepared by hydrogenating a block copolymer comprising at least one polymer block formed mainly from an aromatic vinyl compound and at least one polymer block formed mainly from a conjugated diene compound, (B) 50-1,000 pts.wt. nonaromatic softener having a kinematic viscosity at 40 deg.C of 100 mm2/sec or higher, and (C) 1-100 pts.wt. polymer which is a propylene homopolymer and/or propylene copolymer formed mainly from propylene and has a melt flow rate (at 230 deg.C, under a load of 2.16 kgf, according to JIS K6758) of 20 g/10 min.
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