	US 12,319,795 B2
	Rubber compositions prepared with a polar polysulfide crosslinking agent
Erin Sheepwash, Cuyahoga Falls, OH (US); and Rita E. Cook, Akron, OH (US)
Assigned to Bridgestone Corporation, Chuo-ku (JP)
Appl. No. 17/758,154
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Dec. 30, 2020, PCT No. PCT/US2020/067460 § 371(c)(1), (2) Date Jun. 29, 2022, PCT Pub. No. WO2021/138417, PCT Pub. Date Jul. 8, 2021.
Claims priority of provisional application 62/954,995, filed on Dec. 30, 2019.
Prior Publication US 2023/0030838 A1, Feb. 2, 2023
Int. Cl. C08J 3/24 (2006.01); B60C 1/00 (2006.01); C08K 3/36 (2006.01)

CPC C08J 3/243 (2013.01) [B60C 1/0016 (2013.01); C08K 3/36 (2013.01); C08J 2309/06 (2013.01)]

21 Claims

1. A vulcanizate prepared by a method comprising:

a. combining an elastomer, a filler and a polysulfide crosslinking agent comprising a polar group to form a masterbatch, and

b. adding a curative to the masterbatch to form a vulcanizable composition.