RUBBER COMPOSITION IMPROVED IN WET GRIPPING PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition for tire improved in wet gripping property and wear resistance without impairing breaking strength of tire. SOLUTION: The rubber composition is obtained by melt-kneading (A) a block copolymer composed of (a1) a polymer block consisting mainly of an aromatic vinyl compound and (a2) a polymer block consisting mainly of a conjugate diene compound and having≥30% sum of 3, 4-bond and 1, 2-bond contents with (B) a thermoplastic resin to provide a composition in which the block copolymer is dynamically crosslinked and mixing the resultant composition with (C) at least one kind of rubber component selected from the group consisting of a natural rubber, a diene-based polymer rubber and an olefinic polymer rubber to crosslink the rubber component (C). COPYRIGHT: (C)2004,JPO