Patent ID: 9631076
Date: 2017-04-25
CPC Classifications: B60C,C08L

Claim:
1. A vulcanized rubber composition having: a phase (SBR phase) comprising a styrene butadiene rubber being incompatible with a butadiene rubber and silica, and a phase (BR phase) comprising a butadiene rubber and silica, wherein the SBR phase and the BR phase are incompatible with each other, an abundance ratio α of silica in the SBR phase after vulcanization satisfies the following Relation 1, and a proportion β of the styrene butadiene rubber being incompatible with the butadiene rubber satisfies the following Relation 2: wherein α=Amount of silica in SBR phase/(Amount of silica in SBR phase+Amount of silica in BR phase) and β=(Mass of styrene butadiene rubber being incompatible with butadiene rubber in vulcanized rubber composition/Mass of total rubber components in vulcanized rubber composition).