Trinuclear molybdenum multifunctional additive for lubricating oils
First Claim
1. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount of at least one trinuclear molybdenum compound sufficient to provide said lubricating oil composition with at least 1 ppm of molybdenum.
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Abstract
A lubricating oil composition is provided comprising a major amount of an oil of lubricating viscosity and a minor amount of at least one trinuclear molybdenum compound. Preferably, the trinuclear molybdenum compound is selected from those compounds having the formula Mo3SkL4Qz and mixtures thereof in which L is a ligand having organo groups with a sufficient number of carbon atoms to render the compound soluble in the oil, k varies from 4 through 7, Q is selected from the group of compounds having lone pair electrons including water, amines, alcohols, phosphines, and ethers, and z ranges from 0 to 5. In general, the organo groups of the mono-anionic ligands 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.
78 Citations
31 Claims
- 1. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount of at least one trinuclear molybdenum compound sufficient to provide said lubricating oil composition with at least 1 ppm of molybdenum.
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21. An additive concentrate for blending with lubricating oils comprising an oleagenous carrier and from about 1 to about 200,000 ppm by weight of the molybdenum of a trinuclear molybdenum compound based on the weight of the concentrate.
- 22. A method for preparing an oil soluble trinuclear thiomolybdenum compound comprising combining a liquid containing a molybdenum source, a ligand source, and a sulfur source other than the molybdenum source in order to form an oil soluble trinuclear thiomolybdenum compound.
- 27. A method for preparing a lubricating oil composition comprising combining an oil of lubricating viscosity and an amount of a trinuclear molybdenum compound sufficient to provide said lubricating oil composition with at least about 1 ppm of molybdenum.
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29. A compound having the formula Mo3SkLnQz wherein the L are independently selected ligands, n varies from 1 to 4, k varies from 4 through 7, Q is selected from the group of neutral electron donating compounds, and z ranges from 0 to 5, wherein the compound has a core selected from the group of cores having the structures
and ligands selected from the group of ligands having the formulas wherein X, X1, X2, and Y oxygen or sulfur and wherein R1, R2, and R are independently selected the group of hydrogen and organo groups, wherein at least 21 carbon atoms are present among all the ligands'"'"' organo groups.
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30. A lubricating composition comprising a major amount of an oil of lubricating viscosity and a minor amount of a compound having the formula Mo3SkLnQz wherein the L are independently selected ligands, n varies from 1 to 4, k varies from 4 through 7, Q is selected from the group of neutral electron donating compounds, and z ranges from 0 to 5, wherein the compound has a core selected from the group of cores having the structures
and ligands selected from the group of ligands having the formulas wherein X, X1, X2, and Y oxygen or sulfur and wherein R1, R2, and R are independently selected the group of hydrogen and organo groups.
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31. A method for lubricating an internal combustion engine, comprising:
- adding to an oil of lubricating viscosity a compound containing at least one trinuclear molybdenum core in an amount sufficient to provide said oil with at least 1 ppm of molybdenum, and treating moving parts of the internal combustion engine with said oil.
Specification