| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-resistant styrenic thermoplastic elastomer composition excellent in stretchability and high-speed moldability while having good heat resistance. SOLUTION: The heat-resistant styrenic thermoplastic elastomer composition is obtained by adding 5-100 pts.mass softening agent for hydrocarbon rubbers having a kinematic viscosity (40°C) of 20-300 cSt and 10-60 pts.mass polypropylene based resin to 100 pts.mass mixed thermoplastic elastomer obtained by mixing a hydrogenated styrenic thermoplastic elastomer (A) represented by A-(B-A)<SB>n</SB>(wherein A is a polymer block of a monovinyl substituted aromatic hydrocarbon; B is a polymer block composed of a conjugated diene unit; and n is an integer of 1-5) and having 1,2-vinyl bond content in the conjugated diene portion of not less than 40% and a weight average molecular weight of 10,000-150,000 with a hydrogenated styrenic thermoplastic elastomer (B) represented by the above formula and having a 1,2-vinyl bond content in the conjugated diene portion of less than 40% and a weight average molecular weight of 10,000-150,000 so as for the content of (B) to come to not more than 50 mass%. COPYRIGHT: (C)2009,JPO&INPIT
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