Composition containing isoprene polymer

摘要

A rubber composition containing an isoprene homopolymer or copolymer having a glass transition temperature of not less than -50 DEG C. and a Mooney viscosity of 20 to 120. The composition can provide a cured rubber having a high wet road gripping force and a small dynamic heat generating characteristic, and is very suitable for use in tires of automobiles.