Patent ID: 9228072
Filing Date: 2016-01-05
CPC Classification: C08J,C08K

Claim Text:
1. A method for producing a rubber composition containing a rubber component (A) of at least one selected from natural rubbers and synthetic dienic rubbers, a filler containing an inorganic filler (B), a silane coupling agent (C) and a vulcanization promoter (D), wherein the rubber composition is kneaded in multiple stages, and in the first stage of kneading, the rubber component (A), all or a part of the inorganic filler (B), and all or a part of the silane coupling agent (C) are kneaded, and then the vulcanization promoter (D) is added and further kneaded; wherein the number of molecules of the vulcanization promoter (D) in the rubber composition in the first stage of kneading is from 0.1 to 1.0 time the number of molecules of the silane coupling agent (C) therein.