	US 12,420,588 B2
	Tire
Tetsuya Kunisawa, Kobe (JP)
Assigned to Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Appl. No. 17/439,343
Filed by Sumitomo Rubber Industries, Ltd., Hyogo (JP)
PCT Filed Feb. 12, 2020, PCT No. PCT/JP2020/005262 § 371(c)(1), (2) Date Sep. 14, 2021, PCT Pub. No. WO2020/189100, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-051243 (JP), filed on Mar. 19, 2019.
Prior Publication US 2022/0176744 A1, Jun. 9, 2022
Int. Cl. B60C 1/00 (2006.01); B60C 11/00 (2006.01); B60C 11/03 (2006.01); B60C 11/13 (2006.01); C08K 3/36 (2006.01); C08L 9/06 (2006.01); C08L 21/00 (2006.01)

CPC B60C 1/0016 (2013.01) [B60C 11/00 (2013.01); B60C 11/13 (2013.01); C08K 3/36 (2013.01); C08L 9/06 (2013.01); C08L 21/00 (2013.01); B60C 2011/0353 (2013.01); B60C 2011/0355 (2013.01); B60C 2200/04 (2013.01); C08K 2201/006 (2013.01); Y02T 10/86 (2013.01)]

12 Claims

1. A tire, comprising a tread,

the tread comprising:

a rubber component comprising styrene-butadiene rubber (SBR) and polybutadiene rubber (BR);

a silica having a nitrogen adsorption specific surface area of 200 m²/g or more; and

a softener comprising:

at least one selected from the group consisting of rosin-based resins, coumarone-indene resins, alpha-methylstyrene-based resins, p-t-butylphenol acetylene resins, acrylic resins, C5 resins, and C9 resins, and

oil in an amount of 28 to 40 parts by mass per 100 parts by mass of the rubber component,

the tread satisfying the following relationship (A):

0.25≤total silica content (parts by mass)/(total softener content (parts by mass)×main groove depth (mm))≤0.60,

wherein the total amount of softener is from 30 to 45 parts by mass per 100 parts by mass of the rubber component,

the main groove depth is from 5.3 to 7.5 mm, and

the tread does not include terpene resin.