RUBBER COMPOSITION COMPRISING RICINOLEIC ACID (CO)POLYMER RUBBER, AND USE THEREOF

摘要

Rubber compositions of the invention give crosslinked rubber products having excellent flexibility. The rubber compositions include 50 to 99 parts by weight of a diene rubber (A) and 50 to 1 part by weight of a ricinoleic acid (co)polymer (B) having a weight average molecular weight of not less than 20,000 according to GPC (wherein the total of the diene rubber (A) and the ricinoleic acid (co)polymer (B) is 100 parts by weight).