Lubricating Composition
AssigneeThe Lubrizol Corporation
InventorsDaniel J. Saccomando, Stuart L. Bartley, Shubhamita Basu
Life of this patent
Estimating the term…
Abstract
The invention relates to a lubricating composition containing (a) an oil of lubricating viscosity, and (b) an oil soluble compound with a >N—R—N< group, wherein R may be a hydrocarbylene group. The invention further provides for the use of the lubricating composition for lubricating a limited slip differential.
Claims13
1-15. (canceled)
A lubricating composition comprising an oil of lubricating viscosity and an oil-soluble compound obtained by a process of reacting an N-(2-hydroxyalk(en)yl)alkylenediamine-N,N′,N′-tricarboxylic acid or an N-(alk(en)yl)alkylenediamine-N,N′,N′-tricarboxylic acid or an alkylenediamine-N,N,N′,N′-tetracarboxylic acid with an amine or an alcohol,
- wherein the oil-soluble compound is in the form of a mixture comprising:
- (a) at least 50 mole % to 99.9 mole % of a material represented by the formula:
- and (b) 0.1 mole % to less than 50 mole % of a material represented by the formula:
- wherein
- R2 is a hydrocarbyl group containing 1 to 150 carbon atoms, or an amino-substituted hydrocarbyl group, or an ether-substituted hydrocarbyl group, or a hydroxy-substituted hydrocarbyl group;
- wherein m is 1 to 150;
- and
- R6 is a hydrocarbyl group having 1 to 100 carbon atoms;
- and
- wherein the oil-soluble compound is present in an amount in the range of 0.01 wt % to 5 wt % of the lubricating composition.
Dependencies are inferred from the claim text.