Patent ID: 10538129

Abstract:
The purpose of the present invention is to provide a rubber composition for a base tread being excellent in fuel efficiency. In the rubber composition for a base tread, a dynamic elastic modulus E* (MPa) and a loss tangent tan δ which are measured at a temperature of 70° C., an initial strain of 10% and a dynamic strain of 2% satisfy the following general formulae (1) to (3), and a strength at break TB (MPa) and an elongation at break EB (%) which are measured according to JIS K6251 satisfy the following general formulae (4) and (5). E*/tan δ≥25  General formula (1)2.0≤E*≤8.0  General formula (2)tan δ≤0.08  General formula (3)EB≥350  General formula (4)TB×EB≥8500  General formula (5)