US 12,466,940 B2
Rubber composition for tyres with low rolling resistance and good winter properties
Anup Mondal, Enschede (NL); Tharik Mohamed, Enschede (NL); and Louis Reuvekamp, Enschede (NL)
Assigned to Apollo Tyres Global R&D B.V., Enschede (NL)
Appl. No. 17/767,217
Filed by Apollo Tyres Global R&D B.V., Enschede (NL)
PCT Filed Oct. 7, 2020, PCT No. PCT/EP2020/078155
§ 371(c)(1), (2) Date Apr. 7, 2022,
PCT Pub. No. WO2021/069514, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. LU101429 (LU), filed on Oct. 8, 2019.
Prior Publication US 2022/0372254 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01); C08L 9/00 (2006.01)
CPC C08L 9/06 (2013.01) [B60C 1/0016 (2013.01); C08L 9/00 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2312/08 (2013.01)] 10 Claims
 
1. A cross-linkable rubber composition, the cross-linkable rubber composition comprising, per hundred parts by weight of rubber (phr):
≥10 phr to ≤40 phr of a first rubber, the first rubber being a solution polymerized styrene-butadiene rubber (SSBR) comprising an alkoxysilane group and a primary amino group;
≥20 phr to ≤40 phr of a second rubber, the second rubber being a butadiene rubber (BR) with a cis group content, as determined by infrared spectroscopy (IR), of ≥90%;
≥15 phr to ≤30 phr of a third rubber, the third rubber being a solution polymerized styrene-butadiene rubber (SSBR) having a glass transition temperature Tg of ≥−120° C. to ≤−40° C., the glass transition temperature Tg being measured by differential scanning calorimetry (DSC) according to ISO 22768; and
≥10 phr to ≤20 phr of a fourth rubber, the fourth rubber being a natural rubber; and a coupling agent, a filler, and a resin,
wherein the composition comprises ≥1 phr to ≤20 phr of at least two coupling agents wherein one of the coupling agents is or comprises a mercapto based silane and wherein the ratio of the mercapto based silane to the second coupling agent is in a range of ≥2:1 to ≤10:1.