	US 12,319,092 B2
	Plasticizer system and rubber composition for pneumatic tire
Nihat Ali Isitman, Hudson, OH (US); and Matthew Adam Goldberg, Munroe Falls, OH (US)
Assigned to THE GOODYEAR TIRE & RUBBER COMPANY, Akron, OH (US)
Filed by The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed on May 19, 2021, as Appl. No. 17/324,476.
Prior Publication US 2022/0371365 A1, Nov. 24, 2022
Int. Cl. B60C 1/00 (2006.01); C08K 5/00 (2006.01); C08L 9/06 (2006.01); C08L 25/08 (2006.01); C08L 91/00 (2006.01); C08L 99/00 (2006.01)

CPC B60C 1/0016 (2013.01) [C08K 5/0016 (2013.01); C08L 9/06 (2013.01); C08L 25/08 (2013.01); C08L 91/00 (2013.01); C08L 99/00 (2013.01); C08L 2205/02 (2013.01); C08L 2205/035 (2013.01)]

8 Claims

1. A pneumatic tire having a tread of a rubber composition comprising, based on 100 parts by weight of elastomer (phr):

(A) conjugated diene-based elastomer comprised of:

(1) between 30 phr and 45 phr of a solution polymerized styrene-butadiene rubber (SSBR)

(2) from about 35 to about 50 phr of cis polybutadiene; and

(3) from about 15 to about 35 phr of cis 1,4-polyisoprene rubber; and

(B) a plasticizer system comprised of:

(1) from about 4 to about 8 phr of a plasticizing oil not derived from petroleum, the plasticizing oil being an extender oil included in the SSBR, and

(2) from about 10 to about 20 phr of a hydrocarbon plasticizing resin selected from a group consisting of styrene/α-methyl styrene resin and a polyterpene resin.