Tire
AssigneeBridgestone Corporation
InventorsTakeshi Tsubota, Yuji Oyama
Life of this patent
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Abstract
The present invention provides a tire improved in the run flat durability, having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition comprising a rubber component containing 20% by mass or more of a modified conjugated diene based polymer, satisfying Expression (1) in terms of the elongation X under a stress of 6.5 MPa at 180° C. and the elongation Y under a stress of 6.5 MPa at 25° C. after vulcanization. 1.00≤X/Y≤1.15 (1)
Claims14
A tire having at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler using a rubber composition comprising a rubber component comprising 20% by mass or more of a modified conjugated diene based polymer, satisfying Expression (1) in terms of the elongation X under a stress of 6.5 MPa at 180° C. and the elongation Y under a stress of 6.5 MPa at 25° C. after vulcanization:
- 1.00≤X/Y≤1.15 (1)
- wherein the rubber composition is a rubber composition prepared by mixing the rubber component, a reinforcing filler, a thermosetting resin, a thiuram based vulcanization accelerating agent, a vulcanization accelerating agent other than the thiuram based vulcanization accelerating agent, and a sulfur-containing vulcanizing agent, wherein the rubber composition is prepared by mixing 40 to 100 parts by mass of the reinforcing filler, 1.1 to 2.5 parts by mass of the thiuram based vulcanization accelerating agent, 2.0 to 6.0 parts by mass of the vulcanization accelerating agent other than the thiuram based vulcanization accelerating agent, and 2.0 to 10.0 parts by mass, in terms of a sulfur content, of the sulfur-containing vulcanizing agent based on 100 parts by mass of the rubber component, wherein the thermosetting resin is mixed such that a mass ratio [amount of the thermosetting resin mixed/amount of the reinforcing filler mixed] of 0.001 to 0.043 is obtained.
Dependencies are inferred from the claim text.