| abstract |
Disclosed is a metal-containing detergent suitable for use as a lubricant additive in the form of a concentrate in oil wherein the basic metal-containing material is maintained as a dispersion or solution in said oil by a gemini surfactant system, said gemini surfactant system comprising , A double bond-unsaturated carboxylic acid having 8 to 30 carbon atoms, or derived from or derived therefrom, wherein the double bond (s) of the double bond-unsaturated carboxylic acid is functionalized to form the double The carboxylic acid group (s) of the double bond-unsaturated carboxylic acid is functionalized across the bond (s) or on the double bond (s) and has 4 to 20 carbon atoms Lt; RTI ID = 0.0 > alkyl < / RTI > |