Patent ID: 7875669
Filing Date: 2011-01-25
Classification: B60C,C08C,C08J,C08K,C08L,Y02T

Abstract:
1. A production process of a rubber composition comprising the following (X), (Y) and (F) steps: (1) step (X) of kneading a rubber component (A) comprising a butyl rubber and 5 to 50 parts by mass of at least one filler for reinforcement selected from a group consisting of silica and carbon black based on 100 parts by mass of whole rubber components (C), the proportion of the rubber component (A) occupying the whole rubber components (C) being 10 to 90% by mass, (2) step (Y) of adding a rubber component (B) and 5 to 50 parts by mass of mica based on 100 parts by mass of the whole rubber components (C) to the kneaded article obtained by step (X) and kneading it, the proportion of the rubber component (B) occupying the whole rubber components (C) being 10 to 90% by mass, and (3) step (F) of adding sulfur, a vulcanization accelerator and a vulcanization accelerating aid to the kneaded article obtained by step (Y) and kneading it, wherein the whole rubber components (C) comprises 30 to 100% by mass of butyl rubber.