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US 9,849,735 B2Granted
Run flat tire
AssigneeToyo Tire & Rubber Co., Ltd.
InventorAkie Hiraiwa
Life of this patent
Estimating the term…
Abstract
A run flat tire having improved run flat durability is provided. The run flat tire has a side wall part reinforced by a side reinforcing rubber part, and the side reinforcing rubber part is formed by a rubber composition which comprises 100 parts by mass of a diene rubber containing natural rubber and polybutadiene rubber, and from 0.1 to 4.0 parts by mass of a mercaptobenzimidazole compound.
Claims5
A run flat tire having a side wall part reinforced by a side reinforcing rubber part,
- wherein the side reinforcing rubber part is formed by a rubber composition which comprises 100 parts by mass of a diene rubber containing natural rubber and polybutadiene rubber, and from 0.5 to 1.2 parts by mass of a mercaptobenzimidazole compound, which is 2-mercaptobenzimidazole or the metal salt thereof, or at least one 2-mercaptobenzimidazole type compound selected from 2-mercaptobenzimidazole having at least one alkyl substituent in an aromatic ring and the metal salt thereof, and
- the rubber composition further comprises a phenol type thermosetting resin and a methylene donor, and a mass ratio of the contained amount of the phenol type thermosetting resin to the amount of the methylene donor contained is 1.5 times or more.
Dependencies are inferred from the claim text.