US 12,421,376 B2
Rubber composition for a large-sized tire
Jean-Luc Cabioch, Clermont-Ferrand (FR); and Anthony Monod, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/765,085
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Sep. 29, 2020, PCT No. PCT/FR2020/051699
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/064317, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 1910790 (FR), filed on Sep. 30, 2019.
Prior Publication US 2022/0403144 A1, Dec. 22, 2022
Int. Cl. C08L 9/06 (2006.01)
CPC C08L 9/06 (2013.01) [C08L 2205/025 (2013.01); C08L 2205/035 (2013.01)] 20 Claims
 
1. A tire provided with a tread, of which a mean volumetric void ratio over the entire tread is greater than 10%, the tire comprising a composition based on at least one diene elastomer, on a vulcanization system, and from 0.10 to 1 phr of at least one organic polysulfide,
wherein the at least one organic polysulfide is an aromatic polysulfide corresponding to general formula (I):

OG Complex Work Unit Chemistry
in which:
R3 to R11, which may be identical or different, represent a hydrogen atom, an —OH or —O−M+ radical, or a saturated or unsaturated carbon-based chain containing from 1 to 20 carbon atoms, or a group —OR12, with R12 being an alkyl, arylalkyl, acyl, carboalkoxy, alkyl ether, silyl, or alkylsilyl radical, comprising from 1 to 20 carbon atoms,
M represents an alkali or alkaline-earth metal,
n and n′, which may be identical or different, each represent an integer greater than or equal to 1 and less than or equal to 8,
p is an integer from 0 to 50, and
A is a nitrogen atom, a single bond, or a saturated or unsaturated carbon-based chain of 1 to 20 carbon atoms.