Rubber composition and pneumatic tire
AssigneeToyo Tire Corporation
InventorAkari Hasimoto
Life of this patent
Estimating the term…
Abstract
A rubber composition comprising, per 100 parts by mass of a total amount of a rubber component, 0.1 to 10 parts by mass of a compound represented by the following general formula (1): wherein at least one of R1 to R5 is an —OH group or an —OCH3 group and others are each an —H group or a hydrocarbon group having 1 to 20 carbon atoms, A is an unsaturated bond or an alkylene group having 1 to 20 carbon atoms and optionally having an —H group, a —CH3 group, an —NH2 group, an —O— group, or an —OH group, n is an integer of 0 to 10, and B is a —COOH group, an —OH group, or an ═O group and optionally forms a ring structure with adjacent R1 or R5.
Claims5
A pneumatic tire comprising a rubber part containing a vulcanized rubber of a rubber composition consisting of, per 100 parts by mass of a total amount of a rubber component, 0.1 to 10 parts by mass of a compound represented by the following general formula (1):
- wherein at least one of R1 to R5 is an —OH group or an —OCH3 group and others are each an —H group or a hydrocarbon group having 1 to 20 carbon atoms, A is an unsaturated bond or an alkylene group having 1 to 20 carbon atoms and optionally having an —H group, a —CH3 group, an —NH2 group, an —O— group, or an —OH group, n is an integer of 0 to 10, and B is a —COOH group, an —OH group, or an ═O group and optionally forms a ring structure with adjacent R1 or R5, wherein the compound represented by the general formula (1) is at least one of 3,4-dihydroxycinnamic acid and 3,4-dimethoxycinnamic acid, and an amount of at least one of 3,4-dihydroxycinnamic acid and 3,4-dimethoxycinnamic acid is 1 to 10 phr, and optionally carbon black, silica, a vulcanizing agent, a vulcanizing accelerator, an antiaging agent other than the compound represented by Formula (1), stearic acid, a softener and a processing aid.
Dependencies are inferred from the claim text.