| 摘要 |
PURPOSE: To obtain a thermoplastic elastomer composition, comprising a specific hydrogenated block copolymer, a specified olefin copolymer, a specific copolymer and an oil, excellent in air bag inflating properties, high-temperature aging and weather resistances, molding processability, low cost properties, etc., and useful for automotive air bag covers. CONSTITUTION: This thermoplastic elastomer composition comprises (A) 5-50wt.% block copolymer, comprising >=2 terminal polymer blocks consisting essentially of a vinyl aromatic compound and an intermediate polymer block consisting essentially of a conjugated diene compound and having >=50000 number-average molecular weight, (B) 20-60wt.% propylene-2-8Cα-olefin copolymer having >=90 deg.C heat distortion temperature, (C) 5-70wt.% ethylene-α-olefin(- conjugated diene) copolymer rubber having <=-30 deg.C glass transition temperature, (D) 5-50wt.% paraffinic oil and (E) 0.1-10wt.% silicone oil having >=50000cSt viscosity (at 25 deg.C according to JIS Z8803).
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