Lubricating compositions
OwnerSteve Harris, Jan Bockinventors
Life of this patent
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Abstract
A lubricating oil composition, comprising as an ester additive component, one or more esters of glycerol and a carboxylic acid such as oleic acid having a defined proportion of monoester, diester and/or triester and an oil-soluble molybdenum compound, which may a trinuclear molybdenum compound.
Claims18
A composition comprising:
- (A) oil of lubricating viscosity;
- (B) as an ester additive component, one or more esters of glycerol and a carboxylic acid containing 12 to 30 carbon atoms and 0 to 3 carbon-carbon double bonds wherein less than 50% by mass of the component is one or more monoesters;
- and
- (C) as a further additive component, an oil-soluble molybdenum compound.
A lubricating oil concentrate comprising:
- (A) oil of lubricating viscosity;
- (B) as an ester additive component, one or more esters of glycerol and a carboxylic acid containing 12 to 30 carbon atoms and 0 to 3 carbon-carbon double bonds wherein less than 50% by mass of the component is one or more monoesters;
- and
- (C) as a further additive component, an oil-soluble molybdenum compound.
A method of enhancing the friction-modification properties of a lubricating oil composition in the lubrication of an internal combustion engine at operating temperatures in excess of 90° C., comprising formulating said lubricating oil composition with a combination of:
- (B) as an ester additive component, one or more esters of glycerol and a carboxylic acid containing 12 to 30 carbon atoms and 0 to 3 carbon-carbon double bonds wherein less than 50% by mass of the component is one or more monoesters;
- and
- (C) as a further additive component, an oil-soluble molybdenum compound.
A composition comprising:
- (A) oil of lubricating viscosity;
- (B) as an ester additive component, one or more esters of glycerol and a carboxylic acid containing 12 to 30 carbon atoms and 0 to 3 carbon-carbon double bonds wherein less than 55% by mass of the component is one or more monoesters;
- and
- (C) as a further additive component, an oil-soluble tri-nuclear molybdenum compound.
A method of enhancing the friction-modification properties of a lubricating oil composition in the lubrication of an internal combustion engine at operating temperatures in excess of 90° C., comprising formulating said lubricating oil composition with a combination of:
- (B) as an ester additive component, one or more esters of glycerol and a carboxylic acid containing 12 to 30 carbon atoms and 0 to 3 carbon-carbon double bonds wherein less than 55% by mass of the component is one or more monoesters;
- and
- (C) as a further additive component, an oil-soluble tri-nuclear molybdenum compound.
Dependencies are inferred from the claim text.