US 12,234,422 B2
Lubricants having improved oxidation and deposit control performance
Lisa I. Yeh, Marlton, NJ (US); Camden N. Henderson, Winder, GA (US); and Percy R. Kanga, Cherry Hill, NJ (US)
Assigned to Exxon Mobil Technology and Engineering Company, Spring, TX (US)
Appl. No. 17/924,616
Filed by EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY, Annandale, NJ (US)
PCT Filed May 17, 2021, PCT No. PCT/US2021/032673
§ 371(c)(1), (2) Date Nov. 10, 2022,
PCT Pub. No. WO2021/252142, PCT Pub. Date Dec. 16, 2021.
Claims priority of provisional application 63/036,513, filed on Jun. 9, 2020.
Prior Publication US 2023/0348807 A1, Nov. 2, 2023
Int. Cl. C10M 101/02 (2006.01); C10M 169/04 (2006.01); C10N 20/02 (2006.01); C10N 30/02 (2006.01); C10N 30/10 (2006.01); C10N 40/04 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01)
CPC C10M 101/02 (2013.01) [C10M 169/04 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/1025 (2013.01); C10M 2203/1045 (2013.01); C10N 2020/02 (2013.01); C10N 2030/02 (2013.01); C10N 2030/10 (2013.01); C10N 2040/04 (2013.01); C10N 2040/25 (2013.01); C10N 2070/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method comprising:
blending a Group II base stock having
a T10 distillation point of at least 482° C.,
a viscosity index in a range of 95-119,
a kinematic viscosity at 40° C. in a range of 320 cSt to 550 cSt,
a kinematic viscosity at 100° C. in a range of 24 cSt to 41 cSt,
greater than or equal to about 90 wt. % saturates,
less than or equal to about 10 wt. % aromatics, and
a sum of terminal/pendant propyl groups and terminal/pendant ethyl groups of at least 1.7 per 100 carbon atoms,
with at least one additional base stock comprising a Group I base stock and one or more additives to form a lubricating fluid,
wherein the lubricating fluid has a saturates content of at least 70 wt. % and less than 90 wt % and an oxidation performance indicated by a kinematic viscosity at 100° C. (KV100) increase measured according to ASTM D5704 of 30% or less, or
an oxidation performance indicated by a kinematic viscosity at 100° C. (KV100) increase measured according to ASTM D2893 of 6% or less.