RUBBER COMPOSITION FOR TREAD AND TIRE

摘要

A rubber composition for treads which comprises 100 parts by weight of a rubber ingredient and, incorporated therein, (a) 5 to 40 parts by weight of a softener comprising an oil in which the content of dimethyl sulfoxide (DMSO) extractables as determined by the IP 346 method has been regulated to below 3 wt.% and (b) 5 to 40 parts by weight of a liquid polymer having a viscosity-average molecular weight of 45,000 to 100,000. Compared to conventional rubber compositions containing an aromatic oil in a high proportion, this rubber composition is greatly improved in failure characteristics and abrasion resistance and is inhibited from suffering a decrease in modulus.