Low viscosity ester lubricant and method for using
AssigneeExxonMobil Research and Engineering Company
InventorsJason Z. Gao, Samuel C. Bainbridge, Dennis A. Gaal, Tomasz M. Young
Life of this patent
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Abstract
According to the present disclosure, there is provided a high-temperature lubricant composition. The composition has an amount of an ester. The ester exhibits a kinematic viscosity at 100° C. of 1 to 4 centistokes and a kinematic viscosity ratio at 150° C./100° C. of 0.6 or higher. The composition is at a temperature of 100° C. to 150° C. There is also another lubricating composition having the ester and a polymeric viscosity modifier. There are also methods for using the lubricating compositions in the crankcase of an engine.
Claims12
A high-temperature lubricant composition, comprising an amount of a monoester of 90 wt % or more of the composition based on the total weight of the composition, wherein the monoester exhibits a kinematic viscosity at 100° C. of 1 to 4 centistokes and a kinematic viscosity ratio at 150° C./100°C. of 0.6 or higher, wherein the composition is at a temperature of 100° C. to 150° C., and
- wherein the monoester is selected from the group consisting of 2-ethylhexyl laurate, isobutyl stearate, isobutyl oleate, ethylhexyl isononanoate, isodecyl pelargonate, isononyl heptanoate, isononyl otanoate, isononyl isononanoate, isodecyl isononanoate, and isodecyl ethylhexanoate.
A lubricant composition, comprising a polymeric viscosity modifier in an amount of 5 wt % to 10 wt % and an amount of a monoester 95 wt % to 90 wt % based on the total weight of the composition, wherein the ester exhibits a kinematic viscosity at 100° C. of 1 to 4 centistokes and a kinematic viscosity ratio at 150° C./100° C. of 0.60 or higher, wherein the amount of the polymeric viscosity modifier and the amount of the monoester are present at 90 wt % or more of the composition based on the total weight of the composition, and
- wherein the monoester is selected from the group consisting of 2-ethylhexyl laurate, isobutyl stearate, isobutyl oleate, ethylhexyl isononanoate, isodecyl pelargonate, isononyl heptanoate, isononyl otanoate, isononyl isononanoate, isodecyl isononanoate, and isodecyl ethylhexanoate.
Dependencies are inferred from the claim text.