| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thermoplastic elastomer composition for injection molding which has a good melt flow property and is excellent in moldability. SOLUTION: The thermoplastic elastomer composition for injection molding contains (1) 100 pts.mass polypropylene resin, (2) 10-150 pts.mass copolymer which consists of a vinyl aromatic hydrocarbon polymer block A and a hydrogenated butadiene polymer block B, wherein the block B has a hydrogenation rate of≥90%, the block A accounts for 25 mass% of the block B and the polymer block B contains≥60 mol% of 1,2-bonds before hydrogenation and (3) 5-100 pts.mass hydrogenated block copolymer which consists of a vinyl aromatic hydrocarbon polymer block C and a hydrogenated butadiene polymer block D, wherein the block D has a hydrogenation rate of≥90%, the block C accounts for >5 mass% and <25 mass% of the block D and the block D contains≥62 mol% of 1,2-bonds before hydrogenation. COPYRIGHT: (C)2005,JPO&NCIPI
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