HYDROGENATED BLOCK COPOLYMER, POLYPROPYLENE-BASED RESIN COMPOSITION USING SAME, AND MOLDED BODY THEREOF

摘要

The present invention provides a hydrogenated block copolymer having in a molecule a polymer block (S) having as a main body a vinyl aromatic compound unit and a polymer block (B) having as a main body a conjugated diene compound unit, wherein: in the hydrogenated block copolymer, the content of the polymer block (S) is 5-20 mass%, and the content of the polymer block (B) is 80-95 mass%; the polymer block (B) includes a polymer block (B1) and a polymer block (B2); the vinyl bond amount of the polymer block (B1) before hydrogenation is 30-60 mol% and the vinyl bond amount of the polymer block (B2) before hydrogenation is over 60 mol% and up to 100 mol%; in the hydrogenated block copolymer, the content of the polymer block (B1) is 5-60 mass% and the content of the polymer block (B2) is 30-85 mass%; in the hydrogenated block copolymer, the content of the structure represented by formula (1) is 40-100 mass%, and the hydrogenation rate of the hydrogenated block copolymer is 70 mol% or greater. Formula 1: (S-B) (In formula (1), S refers to the polymer block (S), and B refers to the polymer block (B)).