Hydrogenated block copolymer, polypropylene resin composition using the same, and molded product thereof

摘要

The present invention is a hydrogenated block copolymer having in its molecule a polymer block (S) mainly composed of vinyl aromatic compound units and a polymer block (B) mainly composed of conjugated diene compound units. In the hydrogenated block copolymer, the content of the polymer block (S) is 5 to 20% by mass, the content of the polymer block (B) is 80 to 95% by mass, The polymer block (B) includes a polymer block (B1) and a polymer block (B2), the amount of vinyl bonds before hydrogenation of the polymer block (B1) is 30 to 60 mol%, The amount of vinyl bonds before hydrogenation of the combined block (B2) is more than 60 to 100 mol%, and the content of the polymer block (B1) in the hydrogenated block copolymer is 5 to 60% by mass. , The polymer block (B ) Is 30 to 85% by mass, and in the hydrogenated block copolymer, the content of the structure represented by the following formula (1) is 40 to 100% by mass. Provided is a hydrogenated block copolymer having a hydrogenation rate of 70% by mole or more. (SB) ... Formula (1) (In Formula (1), S means a polymer block (S) and B means a polymer block (B).)