	US 11,685,821 B2
	Rubber composition for a tire tread
Tenko Hayashi, Tokyo (JP)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/252,650
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jun. 15, 2018, PCT No. PCT/JP2018/022830 § 371(c)(1), (2) Date Dec. 15, 2020, PCT Pub. No. WO2019/239568, PCT Pub. Date Dec. 19, 2019.
Prior Publication US 2021/0253833 A1, Aug. 19, 2021
Int. Cl. C08L 9/00 (2006.01); B60C 1/00 (2006.01)

CPC C08L 9/00 (2013.01) [B60C 1/0016 (2013.01); C08L 2205/035 (2013.01); C08L 2207/20 (2013.01)]

20 Claims

1. A tire having a tread comprising a rubber composition based on at least:

an elastomer matrix;

a reinforcing filler comprising between 65 and 115 phr of a reinforcing inorganic filler;

more than 30 phr of a plasticizing agent; and

more than 5 phr of crumb rubber particles having a median particle size by volume, which is measured by laser diffraction methods in accordance with ISO standard 13320-1, which satisfy the following relations:

100 μm<D₅₀<1000 μm,

wherein D₅₀is the median particle size by volume corresponding to 50% of a cumulative distribution obtained from a volume particle size distribution.