Grease compositions
AssigneeExxonMobil Technology and Engineering Company
InventorsChristopher J. FOWLER, Patrick L. YODER
Life of this patent
Estimating the term…
Abstract
Grease compositions may be made from an oil basestock. For example, a grease composition may include: an oil basestock having: a kinematic viscosity (ASTM D445, 40° C.) of from 320 cSt to 520 cSt, a kinematic viscosity (ASTM D445, 100° C.) of from 22 cSt to 36 cSt, a viscosity index (ASTM D2270) of from 80 to 119, a pour point (ASTM D97) of −6° C. or less, and a saturate content (ASTM D7419) of 90 wt % or greater; and from 0.5 wt % to 15 wt % of a thickener, by total weight of the grease composition.
Claims20
A grease composition comprising:
- an oil basestock having:
- a kinematic viscosity (ASTM D445, 40° C.) of from 320 cSt to 520 cSt,
- a kinematic viscosity (ASTM D445, 100° C.) of from 22 cSt to 36 cSt,
- a viscosity index (ASTM D2270) of from 80 to 119,
- a pour point (ASTM D97) of −6° C. or less, and
- a saturate content (ASTM D7419) of 90 wt % or greater;
- and
- from 0.5 wt % to 15 wt % of a thickener, by total weight of the grease composition.
A grease composition comprising:
- an oil basestock having:
- a kinematic viscosity (ASTM D445, 40° C.) of from 460 cSt to 520 cSt,
- a kinematic viscosity (ASTM D445, 100° C.) of from 32 cSt to 36 cSt,
- a viscosity index (ASTM D2270) of from 80 to 119,
- a pour point (ASTM D97) of −15° C. or less, and
- a saturate content (ASTM D7419) of 98 wt % or greater;
- and
- from 6 wt % to 10 wt % of a thickener, by total weight of the grease composition, wherein the thickener comprises a metal soap, and wherein a metal of the metal soap comprises:
- lithium, calcium, barium, sodium, aluminum, or any combination thereof.
A method comprising:
- heating an oil basestock, wherein the oil basestock has:
- a kinematic viscosity (ASTM D445, 40° C.) of from 320 cSt to 520 cSt,
- a kinematic viscosity (ASTM D445, 100° C.) of from 22 cSt to 36 cSt,
- a viscosity index (ASTM D2270) of from 80 to 119,
- a pour point (ASTM D97) of −6° C. or less, and
- a saturate content (ASTM D7419) of 90 wt % or greater;
- and
- mixing the oil basestock with a thickener and heating the mixture under pressure to form a grease;
- adding additional oil basestock to the grease to achieve the desired consistency;
- and
- cooling the grease.
Dependencies are inferred from the claim text.