摘要 |
PROBLEM TO BE SOLVED: To provide a process for producing a rubber composition in which low heat buildup can be improved.SOLUTION: There is provided a process for producing a rubber composition obtained by mixing a rubber ingredient (A) comprising at least one rubber selected from natural rubber and synthetic diene rubbers, a filler comprising carbon black (B), and at least one compound (C) selected from vulcanization accelerators, and the process comprises at least three kneading stages: in the first stage (X) of kneading, the rubber ingredient (A) and all or some of the carbon black (B) are kneaded together; and in a second stage or later and in a stage prior to the final stage (Y) of kneading, the at least one compound (C) selected from vulcanization accelerators is added and kneaded. |