| 摘要 |
The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component. |
| 主权项 |
1. A pneumatic tire, provided with a tread formed from a rubber composition, the rubber composition comprising:
a rubber component, silica, and a silane coupling agent represented by Formula (1) below, the rubber component comprising, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by Formula (I) below, at least one terminal of the polymer being modified with at least one compound selected from the group consisting of a compound represented by Formula (II) below, a compound containing a group represented by Formula (III) below, a compound represented by Formula (IV) below, a silicon compound containing at least one of a group represented by Formula (V) below or a group represented by Formula (VI) below, and a compound containing a group represented by Formula (VII) below, the rubber composition comprising the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component,
(CpH2p+1O)3Si—CqH2q—S—CO—CkH2k+1 (1)wherein p represents an integer of 1 to 3; q represents an integer of 1 to 5; and k represents an integer of 5 to 12,wherein X1, X2, and X3 each independently represent a group represented by Formula (Ia) below, a hydroxy group, a hydrocarbyl group, or a substituted hydrocarbyl group, and at least one of X1, X2, and X3 is a hydroxy group or a group represented by the following Formula (Ia):wherein R1 and R2 each independently represent a C1-6 hydrocarbyl group, a C1-6 substituted hydrocarbyl group, a silyl group, or a substituted silyl group, and R1 and R2 may be bonded to each other to form a cyclic structure together with the nitrogen atom,wherein n represents an integer of 1 to 10; R11, R12, and R13 each independently represent a C1-4 hydrocarbyl group or a C1-4 hydrocarbyloxy group, and at least one of R11, R12, and R13 is a hydrocarbyloxy group; and A1 represents a nitrogen atom-containing functional group,wherein p represents an integer of 0 or 1; T represents a C1-20 hydrocarbylene group or a C1-20 substituted hydrocarbylene group; and A2 represents a nitrogen atom-containing functional group,wherein g represents an integer of 1 to 10; R21 represents a hydrogen atom, a C1-6 hydrocarbyl group, or a C1-6 substituted hydrocarbyl group; A3 represents an oxygen atom or the following group: —NR22— where R22 represents a hydrogen atom or a C1-10 hydrocarbyl group; and A4 represents a functional group containing at least one of a nitrogen atom or an oxygen atom,wherein w represents an integer of 1 to 11; and A5 represents a nitrogen atom-containing functional group. |
