US 12,031,036 B2
Rubber composition with reduced odor and good thermal oxidative aging-resistant and anti-fatigue properties
Yang Gao, Shanghai (CN); Jin Zhang, Shanghai (CN); and Zhimin Tang, Shanghai (CN)
Assigned to Sennics Co., Ltd., Shanghai (CN)
Filed by Sennics Co., Ltd., Shanghai (CN)
Filed on Oct. 13, 2021, as Appl. No. 17/500,302.
Claims priority of application No. 202011090561.7 (CN), filed on Oct. 13, 2020.
Prior Publication US 2022/0112361 A1, Apr. 14, 2022
Int. Cl. C08L 9/00 (2006.01); B60C 1/00 (2006.01); C08K 3/04 (2006.01); C08K 5/3437 (2006.01); C08K 13/02 (2006.01); C08L 7/00 (2006.01)
CPC C08L 9/00 (2013.01) [C08K 5/3437 (2013.01); C08K 13/02 (2013.01); C08L 7/00 (2013.01); B60C 1/00 (2013.01); C08K 3/04 (2013.01); C08L 2201/08 (2013.01); C08L 2205/03 (2013.01); C08L 2312/00 (2013.01)] 20 Claims
 
1. A formulation for rubber composition consisting of
100 parts by weight of a diene elastomer,
30 to 70 parts by weight of a reinforcing filler,
0.1 to 8 parts by weight of an antidegradant composition, wherein the antidegradant composition consists of N-(1,3-dimethylbutyl)-N′-phenyl p-phenylenediamine (6PPD) antidegradant and a homopolymer of 1,2-dihydro-2,2,4-trimethylquinoline (S-TMQ), purity of the 6PPD antidegradant is equal to or greater than about 98%, and a total amount of dimers, trimers, and tetramers of 1,2-dihydro-2,2,4-trimethylquinoline in the S-TMQ is equal to or greater than 80%,
1.3 to 1.7 parts by weight of a crosslinker,
0 to 20 parts by weight of an operating oil, wherein the operating oil is one or more selected from the group consisting of naphthenic oil, aromatic oil, processing oil, lubricating oil, petroleum asphalt, and Vaseline,
0 to 5 parts by weight of a fatty oil softener, wherein the fatty oil softener is one or more selected from the group consisting of stearic acid, castor oil, flaxseed oil, rapeseed oil, coconut oil, beewax, carnauba wax, lanolin, tall oil, linoleic acid, palmitic acid, and lauric acid,
0 to 10 parts by weight of an activator, and
0.5 to 1.2 parts by weight of a promoter, wherein a ratio of the crosslinker to the promoter is in a range of 1.08 to 3.4, and
wherein the rubber composition emits no discomforting odors after a prolonged exposure under 80° C.