Long duration fuel economy lubricating composition
AssigneeTotal Marketing Services
InventorsMickael Debord, Catherine Charrin, Julien Guerin
Life of this patent
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Abstract
In the field of lubricating compositions, in particular to the Fuel Economy (FE) properties of lubricating compositions, there is disclosed the combined use of at least one derivative of molybdenum and at least one derivative of boron to maintain the Fuel Economy (FE) properties of a lubricating composition also including at least one base oil. Also disclosed is a use, within a lubricating composition including at least one base oil, of a combination of at least one derivative of molybdenum and at least one derivative of boron, and at least 30 ppm and at most 600 ppm of born boron relative to the weight of the lubricating composition to preserve the Fuel Economy (FE) properties of this lubricating composition.
Claims9
Method for preserving the Fuel Economy (FE) properties of a lubricating composition comprising at least one base oil, comprising the addition to the lubricating composition of at least one derivative of molybdenum and at least one derivative of boron, the final lubricating composition comprising at least 140 ppm and at most 600 ppm of boron relative to the weight of the lubricating composition, and at least 200 ppm and at most 600 ppm of molybdenum relative to the weight of the lubricating composition, and wherein the weight ratio of molybdenum to boron is from 2:1.4 to 5:2;
- wherein the derivative of molybdenum is an organo-molybdenum compound selected from the group consisting of a dithiocarbamate derivative of molybdenum (MoDTC), a dithiophosphate derivative of molybdenum (MoDTP) and a sulfur-free molybdenum complex;
- and
- wherein the boron derivative is selected from the group consisting of the derivatives of boric acid, the derivatives of boronic acid, boronates, borates, borated dispersants, borated detergents, simple orthoborates, borate epoxides and borate esters.
Dependencies are inferred from the claim text.