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US 9,719,046 B2Granted
Lubricating grease composition
AssigneeChevron U.S.A. Inc.
InventorsSamil Beret, Gian Lawrence Fagan
Life of this patent
Estimating the term…
Abstract
A lubricating grease composition for extra heavy duty extreme pressure applications comprises a major amount of a synthetic base oil a lithium complex thickener, at least one extreme pressure agent; and at least 5 wt. % of molybdenum disulfide, based on a total weight of the lubricating grease composition.
Claims20
A lubricating grease composition comprising:
- a) a major amount of a synthetic base oil having a kinematic viscosity at 40° C. from 150 mm2/s to 250 mm2/s;
- b) a lithium complex thickener;
- c) 2.5 to 5 wt. % of at least one extreme pressure agent, based on a total weight of the lubricating grease composition;
- and
- d) 5 to 20 wt. % of molybdenum disulfide, based on the total weight of the lubricating grease composition;
- wherein the at least one extreme pressure agent is selected from the group consisting of sulfurized animal or vegetable fats or oils;
- sulfurized animal or vegetable fatty acid esters;
- sulfurized olefins;
- dihydrocarbyl polysulfides;
- sulfurized Diels-Alder adducts;
- sulfurized dicyclopentadiene;
- sulfurized or co-sulfurized mixtures of fatty acid esters and mono-unsaturated olefins;
- co-sulfurized blends of fatty acids, fatty acid esters and alpha-olefins;
- functionally-substituted dihydrocarbyl polysulfides;
- thio-aldehydes;
- thio-ketones;
- epithio compounds;
- sulfur-containing acetal derivatives;
- co-sulfurized blends of terpene and acyclic olefins and polysulfide olefin products;
- and mixtures thereof,
- wherein the grease composition exhibits pumpability at −22° F.
18 more elements
A method of making a lubricating grease composition consisting essentially of:
- a) a major amount of a synthetic base oil;
- b) a lithium complex thickener;
- c) 2.5 to 5 wt. % of at least one extreme pressure agent, based on a total weight of the lubricating grease composition;
- and
- d) 5 to 20 wt. % of molybdenum disulfide, based on a total weight of the lubricating grease composition;
- wherein the at least one extreme pressure agent is selected from the group consisting of sulfurized animal or vegetable fats or oils;
- sulfurized animal or vegetable fatty acid esters;
- sulfurized olefins;
- dihydrocarbyl polysulfides;
- sulfurized Diels-Alder adducts;
- sulfurized dicyclopentadiene;
- sulfurized or co-sulfurized mixtures of fatty acid esters and mono unsaturated olefins;
- co-sulfurized blends of fatty acids, fatty acid esters and alpha-olefins;
- functionally-substituted dihydrocarbyl polysulfides;
- thio-aldehydes;
- thio-ketones;
- epithio compounds;
- sulfur-containing acetal derivatives;
- co-sulfurized blends of terpene and acyclic olefins and polysulfide olefin products;
- and mixtures thereof,
- said method comprising:
- blending the synthetic base oil, lithium complex thickener, at least one extreme pressure agent, and molybdenum disulfide to for a lubricating grease composition;
- and isolating the lubricating grease composition.
20 more elements
A method comprising lubricating bearings, surfaces and other components with a lubricating grease composition which consists essentially of:
- a) a major amount of a synthetic base oil;
- b) a lithium complex thickener;
- c) 2.5 wt. to 5 wt. % of at least one extreme pressure agent, based on a total weight of the lubricating grease composition;
- and
- d) 5 to 20 wt. % of molybdenum disulfide, based on a total weight of the lubricating grease composition;
- wherein the at least one extreme pressure agent is selected from the group consisting of sulfurized animal or vegetable fats or oils;
- sulfurized animal or vegetable fatty acid esters;
- sulfurized olefins;
- dihydrocarbyl polysulfides;
- sulfurized Diels-Alder adducts;
- sulfurized dicyclopentadiene;
- sulfurized or co-sulfurized mixtures of fatty acid esters and mono-unsaturated olefins;
- co-sulfurized blends of fatty acids, fatty acid esters and alpha-olefins;
- functionally-substituted dihydrocarbyl polysulfides;
- thio-aldehydes;
- thio-ketones;
- epithio compounds;
- sulfur-containing acetal derivatives;
- co-sulfurized blends of terpene and acyclic olefins and polysulfide olefin products;
- and mixtures thereof.
17 more elements
A lubricating grease composition consisting essentially of:
- a) a major amount of a synthetic base oil having a kinematic viscosity at 40° C. from 150 mm2/s to 250 mm2/s;
- b) a lithium complex thickener;
- c) 2.5 to 5 wt. % of at least one extreme pressure agent, based on a total weight of the lubricating grease composition;
- and
- d) 5 to 20 wt. % of molybdenum disulfide, based on the total weight of the lubricating grease composition;
- wherein the at least one extreme pressure agent is selected from the group consisting of sulfurized animal or vegetable fats or oils;
- sulfurized animal or vegetable fatty acid esters;
- sulfurized olefins;
- dihydrocarbyl polysulfides;
- sulfurized Diels-Alder adducts;
- sulfurized dicyclopentadiene;
- sulfurized or co-sulfurized mixtures of fatty acid esters and mono-unsaturated olefins;
- co-sulfurized blends of fatty acids, fatty acid esters and alpha-olefins;
- functionally-substituted dihydrocarbyl polysulfides;
- thio-aldehydes;
- thio-ketones;
- epithio compounds;
- sulfur-containing acetal derivatives;
- co-sulfurized blends of terpene and acyclic olefins and polysulfide olefin products;
- and mixtures thereof.
17 more elements
Dependencies are inferred from the claim text.