Run flat tire
AssigneeToyo Tire Corporation
InventorAkie Hiraiwa
Life of this patent
Estimating the term…
Abstract
A run flat tire having a side wall part reinforced by a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed from a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100° C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23° C. of from 1.0 to 1.3.
Claims11
A run flat tire having a side wall part reinforced by a side reinforcing rubber part, wherein the side reinforcing rubber part is formed from a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100° C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23° C. of from 1.0 to 1.3,
- wherein the rubber composition comprises a diene rubber containing natural rubber and polybutadiene rubber, a phenol type thermosetting resin and a methylene donor as its hardener, and a mass ratio of the amount of the phenol type thermosetting resin contained to the amount of the methylene donor contained is from 1.5 to 4.0,
- the amount of the phenol type thermosetting resin is from 1 to 10 parts by mass, and the amount of the methylene donor is from 0.5 to 5 parts by mass, per 100 parts by mass of the diene rubber.
Dependencies are inferred from the claim text.