| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogenated diene polymer giving an excellent polypropylene resin composition having excellent rigidity and shock resistance, low in a brittle temperature and less in physical property deterioration due to the retention during injection molding when compounded as an elastomer component with an ethylene-α-olefin random copolymer. SOLUTION: A hydrogenated product of a block polymer consisting of a polymer block mainly composed of an aromatic vinyl compound and a polymer block mainly composed of a conjugated diene compound. In the hydrogenated product, the ratio of 1,2-vinyl bond to 3,4-vinyl bond in the polymer block mainly composed of a conjugated diene compound is 50-75% based on the total of the carbon-carbon double bonds in the polymer block, and the ratio of 1,2-vinyl bond to 3,4-vinyl bond in the polymer block mainly composed of a conjugated diene compound is gradually increasing or gradually decreasing by >=10% from the initial point to the terminal point or coupling part of the polymer block. Further, a polypropylene resin composition.
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