Lubricating oils and greases
AssigneeEquus UK Topco Ltd
InventorsClaire Anne Ward, Alexei Nikolaevich Kurchan
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Abstract
A lubricating oil composition comprises an amide and at least one additive. A lubricating grease composition comprises a liquid amide, a thickener comprising a metal soap, and at least one additive. The amide in each composition is the reaction product of a secondary, branched amine and a carboxylic acid. The carboxylic acid may be a monocarboxylic acid or a dicarboxylic acid, including dimer acid. The amide is hydrolytically stable, and may be used to increase the hydrolytic stability of the lubricant oil or grease composition. Alternatively, the amide may be used to increase the additive solubility or detergency of the lubricant oil or grease composition.
Claims15
A lubricating grease composition comprising:
- a) a base oil comprising an amide which is a liquid at room temperature and which is the reaction product of a secondary, branched amine and a carboxylic acid, wherein the liquid amide is an amide of Formula (Ia) or (Ib):
- wherein:
- R1 and R2are independently selected from the group consisting of C3 to C18 linear or branched, saturated or unsaturated, hydrocarbyl groups,
- R3 is selected from the group consisting of C3 to C50 linear or branched, saturated or unsaturated hydrocarbyl groups,
- R4 is selected from the group consisting of C1 to C50 linear or branched, saturated or unsaturated hydrocarbylene groups,
- n is 0 or 1,
- at least one of R1 and R2 is branched, and
- 2 wt % to 20 wt % of the grease composition is the amide of Formula (Ia) and/or Formula (Ib), wherein the base oil further comprises an oil that is different from the amide of Formula (Ia) or (Ib) and that is 60 wt % to 90 wt % of the grease composition, wherein the amide of Formula (Ia) or (Ib) is/are the only amide component of the grease composition;
- b) a thickener comprising a metal soap(s);
- and
- c) optionally at least one additive.
The grease composition according to claim I, wherein the carboxylic acid is a monocarboxylic acid and the amine is a monoamine.
A method of increasing the additive solubility or detergency of a grease composition which comprises adding to the grease composition:
- a) an amide which is a liquid at room temperature and which is the reaction product of a secondary, branched amine and a carboxylic acid, wherein the liquid amide is an amide of Formula (Ia) or (Ib):
- wherein:
- R1 and R2 are independently selected from the group consisting of C3 to C18 linear or branched, saturated or unsaturated, hydrocarbyl groups,
- R3 is selected from the group consisting of C3 to C50 linear or branched, saturated or unsaturated hydrocarbyl groups,
- R4 is selected from the group consisting of C1 to C50 linear or branched, saturated or unsaturated hydrocarbylene groups,
- n is 0 or 1,
- at least one of R1 and R2 is branched;
- b) a thickener comprising a metal soap;
- and
- c) optionally at least one additive;
- to form a modified grease composition, wherein the 2 wt % to 20 wt % of the modified grease composition is the amide of Formula (Ia) and/or Formula (lb) wherein the modified grease composition comprises an oil that is different from the amide of Formula (Ia) or (Ib) and that is 60 wt % to 90 wt % of the modified grease composition, and wherein the amide of Formula (Ia) or (Ib) is/are the only amide component of the modified grease composition.
A lubricating grease composition comprising:
- a) a base oil comprising an amide which is a liquid at room temperature and which is the reaction product of a secondary, branched amine and a carboxylic acid, wherein the liquid amide is an amide of Formula (Ia) or (Ib):
- wherein:
- R1 and R2 are independently selected from the group consisting of an isopropyl group and a C3 to C18 branched, saturated or unsaturated, hydrocarbyl groups,
- R3 is selected from the group consisting of C3 to C23 linear or branched, saturated or unsaturated hydrocarbyl groups,
- R4 is selected from the group consisting of C1 to C12 linear or branched, saturated or unsaturated hydrocarbylene groups,
- n is 0 or 1, and
- 2 wt % to 20 wt % of the grease composition is the amide of Formula (Ia) and/or Formula (Ib), wherein the base oil further comprises an oil that is different from the amide of Formula (Ia) or (Ib) and that is 60 wt % to 90 wt % of the grease composition, wherein the amide of Formula (Ia) or (Ib) is/are the only amide component of the grease composition;
- b) a thickener comprising a metal soap(s);
- and
- c) 0.2 wt % to 2 wt % based on the total weight of the grease composition of at least one additive that is a molybdenum dialkyldithiocarbamate.
Dependencies are inferred from the claim text.