Multi-function additive for lubricating oils
First Claim
1. A lubricating composition comprising:
- a major amount of an oil of lubricating viscosity; and
, a minor amount of an additive having the formula Mo4 S4 L6 wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has a sufficient number of carbon atoms to render the additive soluble in the oil.
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Abstract
A lubricating oil composition is provided which comprises a major amount of an oil of lubricating viscosity and a minor amount of an additive having the formula Mo4 S4 L6 in which L is a ligand selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and in which the ligands, L, have organo groups having a sufficient number of carbon atoms to render the additive soluble in the oil. In general, the organo groups of the ligands, L, will be the same, although they may be different and they preferably are selected from alkyl, aryl, substituted aryl and ether groups. For example, when L is a dialkyldithiocarbamate or a dialkyldithiophosphate, the alkyl groups will have from about 1 to 30 carbon atoms.
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Citations
16 Claims
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1. A lubricating composition comprising:
- a major amount of an oil of lubricating viscosity; and
, a minor amount of an additive having the formula Mo4 S4 L6 wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has a sufficient number of carbon atoms to render the additive soluble in the oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a major amount of an oil of lubricating viscosity; and
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9. A lubricating composition comprising:
- a major amount of an oil selected from natural and synthetic oils having viscosities in the range of from about 5 to about 26 centistokes at 100°
C., and from about 0.01 to about 10 weight percent of an additive having the formula Mo4 S4 L6, wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has from about 1 to about 30 carbon atoms and when the ligand, L, is a dithiocarbamate having alkyl organo groups, the alkyl groups have greater than about 4 carbon atoms. - View Dependent Claims (10, 11, 12, 13, 14)
- a major amount of an oil selected from natural and synthetic oils having viscosities in the range of from about 5 to about 26 centistokes at 100°
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15. An additive concentrate for blending with lubricating oils to provide a lubricating composition having antiwear, antioxidant and friction reducing properties comprising:
- a hydrocarbon diluent and from about 1 to about 90 weight percent of an additive, based on the weight of diluent, the additive having the formula Mo4 S4 L6 wherein L is an organo group selected from dithiocarbamates, dithiophosphates, dithiophosphinates, thioxanthates, and mixtures thereof and wherein the organo group has from about 1 to about 30 carbon atoms and when the organo group is a dithiocarbamate having alkyl organo groups, the alkyl groups have greater than about 4 carbon atoms.
- View Dependent Claims (16)
Specification