US 12,187,895 B2
Rubber composition and a tire
Jerome Joel Daniel Delville, Rehon (FR); Carlo Kanz, Mamer (LU); Pascal Patrick Steiner, Vichten (LU); and Marie-Laure Stephanie Milan, Strassen (LU)
Assigned to THE GOODYEAR TIRE & RUBBER COMPANY, Akron, OH (US)
Filed by The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed on Jun. 17, 2022, as Appl. No. 17/807,493.
Claims priority of provisional application 63/237,316, filed on Aug. 26, 2021.
Prior Publication US 2023/0082511 A1, Mar. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01)
CPC C08L 9/06 (2013.01) [B60C 1/0016 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01)] 18 Claims
 
1. A rubber composition comprising:
70 phr to 95 phr of styrene butadiene rubber comprising at least 5 phr of a first styrene butadiene rubber having a glass transition temperature determined as a peak midpoint by differential scanning calorimeter (DSC) at a temperature rate of increase of 10° C. per minute according to ASTM D3418 within a range of −49° C. to −15° C. and at least 45 phr of a second styrene butadiene rubber having a glass transition temperature within a range of −50° C. to −75° C., wherein the rubber composition comprises more of the second styrene butadiene rubber than of the first styrene butadiene rubber;
5 phr to 30 phr of at least one member selected from the group consisting of natural rubber and synthetic polyisoprene rubber;
more than 150 but less than 200 phr of filler including both silica and coupling agent; and
at least 55 phr of at least one hydrocarbon resin comprising at least one terpene resin which has a glass transition temperature of at least 30° C.; and,
optionally 1 phr to 4 phr of oil.