RUBBER MIXTURE FOR NON-STEELED WINTER TIRES AND NON-STEELED WINTER TIRE

摘要

1. A rubber composition for non-studded winter tires, comprising: a rubber component that includes natural rubber, butadiene rubber, aromatic oil, silicon dioxide, and soot, wherein the combined amount of natural rubber and butadiene rubber is 30% by mass or more based on 100 wt.% rubber component, the amount of aromatic oil is from 12 to 85 wt. parts in relation to 100 mass. parts of the rubber component, the content of silicon dioxide is 45 wt.% or more based on 100 wt.% the total amount of silicon dioxide and soot, silicon dioxide includes one or more varieties of silicon dioxide (1) with a specific surface area determined by the absorption of nitrogen, component of 100 m / g or less, and one or more varieties of silicon dioxide (2) with a specific surface area determined by nitrogen absorption of 180 m / g or more, the combined amount of silicon dioxide (1) and silicon dioxide (2) is from 30 to 150 m ss. parts in relation to 100 mass. parts of the rubber component, and the amount of silicon dioxide (1) and the amount of silicon dioxide (2) satisfy the following ratio: [amount of silicon dioxide (1)] × 0.2 ≤ [amount of silicon dioxide (2)] ≤ [amount of silicon dioxide (1 )] × 6.5.2. A non-studded winter tire comprising a tread comprising a rubber composition according to claim 1.