Oil-extended conjugated diene-based polymer, rubber composition, crosslinked rubber product, and tire

Abstract

Provided is an oil-extended conjugated diene-based polymer obtained by using 5-60 parts by weight of an oil (B), which is described in the specification and in which (1) a UV / RI detection area ratio [XUV / XRI] is not more than 10 and (2) the extrapolated melting initiation temperature [Tim-max] of the melting heat peak on the highest temperature side is not higher than 23°C, with respect to 100 parts by weight of a conjugated diene-based polymer (A) to extend the conjugated diene-based polymer (A).