US 12,492,300 B2
Rubber composition
Patricia Lagarde, Clermont-Ferrand (FR); and Aline Riou, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/629,601
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jul. 21, 2020, PCT No. PCT/FR2020/051312
§ 371(c)(1), (2) Date Jan. 24, 2022,
PCT Pub. No. WO2021/019150, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1908496 (FR), filed on Jul. 26, 2019.
Prior Publication US 2022/0282070 A1, Sep. 8, 2022
Int. Cl. C08L 7/02 (2006.01); B60C 1/00 (2006.01); C08J 3/22 (2006.01); C08K 3/04 (2006.01); C08K 3/06 (2006.01); C08K 3/36 (2006.01); C08K 5/01 (2006.01); C08K 5/098 (2006.01)
CPC C08L 7/02 (2013.01) [B60C 1/00 (2013.01); C08J 3/22 (2013.01); C08K 3/04 (2013.01); C08K 3/06 (2013.01); C08K 3/36 (2013.01); C08K 5/01 (2013.01); C08K 5/098 (2013.01); B60C 2001/0066 (2013.01); C08K 2201/006 (2013.01)] 10 Claims
 
1. A rubber composition based on:
an elastomeric matrix consisting of one or more diene elastomers each selected from the group consisting of natural rubber, synthetic polyisoprenes, and mixtures thereof;
at least one reinforcing filler predominantly comprising carbon black and at least one reinforcing inorganic filler;
at least one plasticizing resin having a glass transition temperature of greater than or equal to 20° C.;
at least one cobalt salt; and
at least one vulcanization system,
wherein the rubber composition exhibits a Z score for dispersion of the at least one reinforcing filler in the elastomeric matrix of greater than or equal to 85,
wherein the rubber composition is obtained from a masterbatch of the elastomeric matrix and of the carbon black,
wherein the carbon black exhibits a BET specific surface of greater than 60 m2/g,
wherein the reinforcing inorganic filler comprises a silica,
wherein a content of the reinforcing inorganic filler is between from 2 to 40 phr,
wherein a content of the plasticizing resin is from 3 to 10 phr, and
wherein a content of the cobalt salt is from 0.1 to 6 phr.