| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a vulcanized rubber composition capable of improving abrasion resistance and low fuel consumption in a good balance, a vulcanized rubber composition excellent in abrasion resistance and low fuel consumption and a studless tire using the same for the constitution of a tread.SOLUTION: There are provided a vulcanized rubber composition having a phase containing butadiene rubber and silica (BR phase) and a phase containing isoprene rubber and silica (IR phase), where the BR phase and the IR phase are incompatible to each other, abundance ratio α of the silica in the BR phase after vulcanization satisfies 0.3≤α≤0.7 (Formula 1) and ratio β of the butadiene rubber satisfies 0.4≤β≤0.8 (Formula 2) and a tire having a tread constituted by the same.SELECTED DRAWING: Figure 1 |
