Patent ID: 6401781
Filing Date: 2002-06-11
Classification: B60C,C08K,Y10T

Abstract:
A pneumatic radial tire comprising: a carcass; a tread overlying the crown region of said carcass; a belt interposed between said tread and said crown region of said carcass, said belt including a plurality of plies of belt cords; and an under-belt pad interposed circumferentially between edge portions of the belt and the carcass and an intermediate rubber layer interposed between the under-belt and the carcass in a shoulder portion thereof, the intermediate rubber layer being of a rubber compound containing resorcin or a resorcin derivative and hexamethylene tetramine or a melamine derivative as a methylene donor and having a dynamic viscoelasticity Eâ€² of 5 MPa to 10 MPa, a loss tangent tan &dgr; of 0.10 to 0.18 and a 300% modulus of 11 MPa to 15 MPa.