| 摘要 |
<p>In a first step, a rubber composition (A) is prepared which comprises an aromatic vinyl/butadiene copolymer rubber (a) and carbon black. In a second step, the rubber composition (A) is kneaded together with isoprene rubber (b) to prepare a rubber composition (B) which contains, per 100 parts by weight of the sum of the rubbers (a) and (b), 20 to 80 parts by weight of the aromatic vinyl/butadiene copolymer rubber (a) in which the content of aromatic vinyl units is 5 to 50 wt.% and the content of 1,2-bonds in the butadiene units is 50% or higher and 5 to 120 parts by weight of the carbon black.</p> |
