US 12,215,294 B2
Lubricant composition
Michael D. Hoey, Maplewood, NJ (US); David Chasan, Teaneck, NJ (US); Jeffrey Schoonmaker, Wallkill, NY (US); and Ryan Fenton, Norwalk, CT (US)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Filed by BASF SE, Ludwigshafen (DE)
Filed on Mar. 20, 2019, as Appl. No. 16/359,124.
Claims priority of provisional application 62/645,272, filed on Mar. 20, 2018.
Prior Publication US 2019/0292480 A1, Sep. 26, 2019
Int. Cl. C10M 141/08 (2006.01); C10M 125/22 (2006.01); C10M 133/12 (2006.01); C10M 135/24 (2006.01); C10M 137/10 (2006.01); C10M 151/04 (2006.01); C10M 101/02 (2006.01); C10N 10/04 (2006.01); C10N 10/12 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 40/00 (2006.01); C10N 40/02 (2006.01); C10N 60/10 (2006.01)
CPC C10M 141/08 (2013.01) [C10M 125/22 (2013.01); C10M 133/12 (2013.01); C10M 135/24 (2013.01); C10M 137/10 (2013.01); C10M 151/04 (2013.01); C10M 101/02 (2013.01); C10N 2010/04 (2013.01); C10N 2010/12 (2013.01); C10N 2030/10 (2013.01); C10N 2030/12 (2013.01); C10N 2040/02 (2013.01); C10N 2040/135 (2020.05); C10N 2060/10 (2013.01)] 18 Claims
 
1. A lubricant composition comprising
a base oil,
about 0.2 wt % to about 0.8 wt % of one or more N-α-naphthyl-N-phenylamine antioxidants and one or more diphenylamine antioxidants, in total, based on the total weight of the lubricant composition, wherein the one or more N-α-naphthyl-N-phenylamine antioxidants are of formula

OG Complex Work Unit Chemistry
wherein
R is C1-C18 alkyl, C2-C18 alkenyl, C2-C18 alkynyl, —C(O) C1-C18 alkyl or —C(O)aryl;
R1, R2, R3 and R4 are each independently H, C1-C18 alkyl, C1-C18 alkoxy, C1-C18 alkylamino, C1-C18 dialkylamino, C1-C18 alkylthio, C2-C18 alkenyl, C2-C18 alkynyl or C7-C21 aralkyl with the proviso that when R is C3 alkenyl, R2 or R3 is not hydrogen; and
one or more sulfur-containing additives comprising one or more di-tert-alkyl polysulfides in an effective amount to provide a sulfur concentration, in total, ranging from about 50 ppm to about 1000 ppm by weight, based on the total weight of the lubricant composition.