Lubricating oils and greases
AssigneesCroda International PLC, Croda, Inc.
InventorsClaire Anne Ward, Alexei Nikolaevich Kurchan
Life of this patent
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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.
Claims16
A lubricating grease composition comprising:
- a) a base oil comprising a liquid amide which is the reaction product of a secondary, branched amine and a carboxylic acid;
- b) a thickener comprising a metal soap(s);
- and
- c) optionally at least one additive.
A method of increasing the additive solubility or detergency of a grease composition which comprises adding to the grease composition:
- a) a liquid amide which is the reaction product of a secondary, branched amine and a carboxylic acid;
- b) a thickener comprising a metal soap;
- and
- c) optionally at least one additive.
A method of producing a hydrolytically stable grease composition comprising:
- reacting a secondary, branched amine and a carboxylic acid to form a liquid amide;
- and
- adding a thickener comprising a metal soap and optionally at least one additive to the amide.
Dependencies are inferred from the claim text.