Lubricating oil additives
AssigneeInfineum International Limited
InventorsPeter J. Dowding, Elin J. Eis
Life of this patent
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Abstract
A metal-containing detergent, suitable for use as a lubricant additive, in the form of a concentrate in oil in which a basic metal-containing material is maintained in dispersion or solution in the oil by a gemini surfactant system comprising, or being derivable or derived from, a double bond-unsaturated carboxylic acid having 8 to 30 carbon atoms, the double bond or bonds of which being functionalized to carry polar groups across or on the double bond or bonds and the carboxylic acid group or groups thereof being functionalized to become an amide or ester group carrying at least one alkyl group having 4 to 20 carbon atoms.
Claims15
A crankcase lubricating oil composition comprising:
- a major amount of an oil of lubricating viscosity;
- and
- a minor amount of a metal-containing detergent, in the form of a concentrate in oil as a dispersion or a solution, comprising a gemini surfactant system derived from a C8-C30 double bond-unsaturated carboxylic acid, which double bond has been functionalized to form at least one polar group and which carboxylic acid has been functionalized to form an amide or ester group having at least one C4-C20 alkyl group.
A method of improved friction reduction performance of a crankcase lubricating oil composition, which method comprises formulating the composition to contain a minor amount of a metal-containing detergent, in the form of a concentrate in oil as a dispersion or a solution, comprising a gemini surfactant system derived from a C8-C30 double bond-unsaturated carboxylic acid, which double bond has been functionalized to form at least one polar group and which carboxylic acid has been functionalized to form an amide or ester group having at least one C4-C20 alkyl group.
Dependencies are inferred from the claim text.