The rubber constituent, the building a bridge Characteristic rubber constituent and building a bridge ones

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition improved in the dispersion characteristics of a diene rubber and a polypropylene resin and the interfacial adhesion between thera, and excellent in mechanical properties and wear resistance, a crosslinkable rubber composition, and a crosslinked material.;SOLUTION: The rubber composition is characterized by comprising (1) a diene rubber, (2) a polypropylene resin, and (3) a block copolymer which consists of diene polymer blocks A and hydrogenated diene polymer blocks B and which has any one of primary structures of (A-B)X, (A-B)X-A and B-(A-B)X (wherein X is an integer of 1 or greater), with the content of the polypropylene resin (2) being 0.1-70 pts.mass based on 100 pts.mass of the diene rubber (1), and the content of the block copolymer (3) being 0.1-25 pts.mass based on 100 pts.mass total of the diene rubber (1) and the polypropylene resin (2).;COPYRIGHT: (C)2003,JPO