US 12,448,474 B2
Rubber composition and tire
Ryota Sone, Tokyo (JP)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 17/775,149
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Sep. 23, 2020, PCT No. PCT/JP2020/035869
§ 371(c)(1), (2) Date May 6, 2022,
PCT Pub. No. WO2021/106338, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 2019-217352 (JP), filed on Nov. 29, 2019.
Prior Publication US 2022/0411554 A1, Dec. 29, 2022
Int. Cl. C08F 236/06 (2006.01); B60C 1/00 (2006.01); C08C 19/22 (2006.01); C08C 19/25 (2006.01); C08C 19/44 (2006.01); C08F 212/08 (2006.01); C08F 236/10 (2006.01); C08K 3/36 (2006.01); C08K 5/548 (2006.01); C08L 15/00 (2006.01)
CPC C08F 236/06 (2013.01) [B60C 1/00 (2013.01); B60C 1/0016 (2013.01); C08C 19/22 (2013.01); C08C 19/25 (2013.01); C08C 19/44 (2013.01); C08F 212/08 (2013.01); C08F 236/10 (2013.01); C08K 3/36 (2013.01); C08K 5/548 (2013.01); C08L 15/00 (2013.01); Y02T 10/86 (2013.01)] 6 Claims
 
1. A rubber composition, comprising a rubber component, a filler containing silica, and a silane coupling agent, wherein
the rubber component contains a conjugated diene-based polymer modified with a modifier containing a compound represented by the formula (1), and
the silane coupling agent is a compound represented by the formula (2),

OG Complex Work Unit Chemistry
where R1 to R8 are each an independent alkyl group having 1 to 20 carbon atoms; L1 and L2 are each an independent alkylene group having 1 to 20 carbon atoms; and n is an integer of 2 to 4,

OG Complex Work Unit Chemistry
where in the formula, R1, R2 and R3 are each independently a group selected from —O—CjH2j+1, —(O—CkH2k—)a—O—CmH2m+1, and —CnH2n+1, j, m and n are each independently 0 to 12, k and a are each independently 1 to 12, and R4 has 1 to 12 carbon atoms and is a linear, branched, or cyclic saturated or unsaturated group selected from alkylene group, cycloalkylene group, cycloalkylalkylene group, cycloalkenylalkylene group, alkenylene group, cycloalkenylene group, cycloalkylalkenylene group, cycloalkenylalkenylene group, arylene group, and aralkylene group.