| 摘要 |
<p>A rubber composition comprising: a rubber ingredient (I) comprising a block copolymer (i) which is made up of (A) 10 to 98 wt.% at least one conjugated diene polymer segment comprising conjugated diene monomer units having a cis bond unit content of 40 wt.% or higher and (B) 90 to 2 wt.% at least one crystalline segment and has a molecular weight distribution (Mw/Mn) of 4 or lower and a weight-average molecular weight of 20,000 to 10,000,000 in terms of polystyrene; and a reinforcement (II). The rubber ingredient (I) preferably further contains, besides the block copolymer (i), a polymer (ii) comprising 0 to 50 wt.% aromatic monovinyl monomer units and 100 to 50 wt.% conjugated diene monomer units.</p> |
