Patent ID: 9309387
Filing Date: 2016-04-12
CPC Classification: B60C,C08K,C08L,Y02T

Claim Text:
1. A rubber composition for tires, consisting of a diene rubber, non-aggegated silica, a sulfur-containing silane coupling agent and an alkyltriethoxysilane represented by formula (I) below, wherein 50 mass % or more of the diene rubber is a styrene-butadiene copolymer rubber, the sulfur-containing silane coupling agent has a mercapto group, the content of the silica is from 5 to 150 parts by mass per 100 parts by mass of the diene rubber, the content of the sulfur-containing silane coupling agent is from 3 to 15 mass % relative to the content of the silica, and the content of the alkyltriethoxysilane is from 0.1 to 20 mass % relative to the content of the silica and has the formula; in the formula, R wherein the silica has a CTAB adsorbtion specific surface area of greater than 160 m and additives selected from the group consisting of fillers excluding aggregated silica, crosslinking agents, crosslinking accelerators, zinc oxide, oils, anti-aging agents, plasticizers and mixtures thereof.