US 12,304,245 B2
Tire rubber composition and pneumatic tire
Shuichiro Ono, Kobe (JP); and Fumiya Kato, Kobe (JP)
Assigned to Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Appl. No. 17/434,316
Filed by Sumitomo Rubber Industries, Ltd., Hyogo (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007791
§ 371(c)(1), (2) Date Mar. 1, 2022,
PCT Pub. No. WO2020/179582, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 2019-037706 (JP), filed on Mar. 1, 2019.
Prior Publication US 2023/0202235 A1, Jun. 29, 2023
Int. Cl. B60C 11/03 (2006.01); B60C 1/00 (2006.01); B60C 11/00 (2006.01); C08F 136/08 (2006.01); C08L 9/06 (2006.01); C08L 45/02 (2006.01); C08L 47/00 (2006.01)
CPC B60C 1/0016 (2013.01) [B60C 11/0008 (2013.01); B60C 11/03 (2013.01); C08F 136/08 (2013.01); C08L 9/06 (2013.01); C08L 45/02 (2013.01); C08L 47/00 (2013.01); B60C 2011/0025 (2013.01); B60C 2011/0033 (2013.01); B60C 2011/0353 (2013.01); B60C 2011/0355 (2013.01); C08L 2205/03 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A tire rubber composition,
comprising, based on 100% by mass of total rubber components therein, 25% by mass or more of an isoprene-based rubber and 35% by mass or more of a styrene-butadiene rubber, and
having a tan δ versus temperature curve whose peak tan δ and half width satisfy the following relationship (1):
Peak tan δ/Half width≥0.025  (1).