Tire
AssigneeThe Goodyear Tire & Rubber Company
InventorsClaude Schweitzer, Alexis Sosnowski, Serge Guillaume Feltes
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a tire having a tread comprising two shoulder portions and a center portion axially between the two shoulder portions, wherein at least one of the shoulder portions comprises a first rubber composition and the center portion comprises a second rubber composition different from said first rubber composition. The first rubber composition has a shear storage modulus which is at least 10% lower than the shear storage modulus of the second rubber composition, and the second rubber composition has a glass transition temperature which is at least 5% higher than the glass transition temperature of the first rubber composition.
Claims19
A tire comprising
- a tread comprising two shoulder portions and a center portion axially between the two shoulder portions,
- wherein at least one of the shoulder portions comprises a first rubber composition formed with a filler containing comprising at least 80% by weight silica, and the center portion comprises a second rubber composition different from said first rubber composition having a filler comprising at least 80% by weight silica, and
- wherein the first rubber composition has a shear storage modulus G′ (1%) which is at least 10% lower than a shear storage modulus G′ (1%) of the second rubber composition, wherein the shear storage modulus G′ (1%) is based on ASTM D5289 or equivalent at 100° C. and
- wherein the second rubber composition has a glass transition temperature which is at least 5% higher than the glass transition temperature of the first rubber composition, wherein the first rubber composition has a Tg between −15° C. and −30° C. and the second rubber composition has a Tg between −16° C. and −25° C.
Dependencies are inferred from the claim text.