Patent ID: 8329799
Filing Date: 2012-12-11
Classification: B60C,C08K,C08L

Abstract:
1. A rubber composition for a studless tire, comprising: a rubber component containing natural rubber and butadiene rubber; an aromatic oil; silica; carbon black; and a mixture of a zinc salt of an aliphatic carboxylic acid and a zinc salt of an aromatic carboxylic acid, wherein the total amount of the natural rubber and the butadiene rubber is 30% by mass or more based on 100% by mass of the rubber component, the amount of the aromatic oil is 45 to 85 parts by mass, the amount of the silica is 30 to 85 parts by mass, and the amount of the mixture is 1 part by mass or more, per 100 parts by mass of the rubber component, and the proportion of the silica is 45% by mass or more based on 100% by mass of the total amount of the silica and the carbon black.