Lubricant containing molybdenum compound and secondary diarylamine
AssigneeAfton Chemical Intangibles LLC
InventorsVincent James Gatto, Mark Thomas Devlin
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Abstract
There is disclosed a lubricating oil composition which contains from about 100 to 450 parts per million of molybdenum from a molybdenum compound which is substantially free of active sulfur and about 750 to 5,000 parts per million of a secondary diarylamine. This combination of ingredients provides improved oxidation control and friction modifier performance to the lubricating oil. The composition is particularly suited for use as a crankcase lubricant.
Claims69
A lubricating composition comprising a major amount of lubricating oil, an oil soluble molybdenum compound providing about 100 to 450 parts per million of molybdenum, said molybdenum compound selected from the group consisting of a sulfur and phosphorus free organic amide molybdenum complex and a molybdenum carboxylate wherein the carboxylate anion has from about 4 to 30 carbon atoms and about 750 to 5,000 parts per million of an oil soluble secondary diarylamine.
A method for improving the antioxidancy and friction properties of a lubricant which comprises including in the lubricant, a molybdenum compound which provides about 100 to 450 parts per million of molybdenum said molybdenum compound selected from the group consisting of a sulfur and phosphorus free organic amide molybdenum complex and a molybdenum carboxylate wherein the carboxylate anion has from about 4 to 30 carbon atoms and about 750 to 5,000 parts per million of an oil soluble secondary diarylamine.
A lubricating oil concentrate prepared by dissolving a total of from about 2.5 to 90 parts by weight of an oil soluble molybdenum compound selected from the group consisting of a sulfur and phosphorus free organic amide molybdenum complex and a molybdenum carboxylate derived from an organic carboxylic acid having about 4 to 30 carbon atoms and an oil soluble secondary diarylamine dissolved in 10 to 97.5 parts of a solvent wherein the weight ratio of molybdenum to amine is from about 0.02 to 0.6 parts of molybdenum for each part of amine.
A lubricating oil composition prepared by mixing an oil soluble molybdenum compound selected from the group consisting of a sulfur and phosphorus free organic amide molybdenum complex and a molybdenum carboxylate derived from monocarboxylic acids selected from the group consisting of aliphatic acids having about 4 to 18 carbon atoms, alicyclic acids containing from 4 to 12 carbon atoms and aromatic acids containing from 7 to 14 carbon atoms and an oil soluble secondary diaryl amine in a lubricating oil wherein the concentration of the molybdenum in the oil is from about 100 to 450 parts per million and the concentration of the amine in the oil is from about 750 to 5,000 parts per million based on said composition.
A method for improving the antioxidant and friction properties of a lubricant which comprises adding to the lubricant an oil soluble molybdenum carboxylate derived from an organic carboxylic acid having from about 4 to 30 carbon atoms and wherein said molybdenum carboxylate provides about 100 to 450 parts per million of molybdenum and about 750 to 5,000 parts per million of an oil soluble secondary diarylamine.
A lubricating composition comprising:
- a major amount of lubricating oil,
- at least one oil soluble molybdenum compound that is at least substantially free of phosphorus and at least substantially free of sulfur that becomes more acidic in the lubricating oil upon use, and
- at least one oil soluble secondary diarylamine,
- wherein the ratio of said oil soluble molybdenum compound relative to said oil soluble secondary diarylamine is about 0.02 to 0.6 parts by weight molybdenum per part of said secondary diarylamine, said oil soluble secondary diarylamine is present in an amount of at least about 750 to about 5,000 parts per million of said lubricating composition.
A lubricating composition comprising:
- a major amount of lubricating oil,
- at least one oil soluble molybdenum compound that is at least substantially free of phosphorus and at least substantially free of sulfur that becomes more acidic in the lubricating oil upon use, and
- at least one oil soluble secondary diarylamine,
- wherein the ratio of said oil soluble molybdenum compound relative to said secondary diarylamine is about 0.02 to 0.6 parts by weight molybdenum per part of said secondary diarylamine compound and said oil soluble molybdenum compound is present in an amount of about 100 to 468 parts per million of molybdenum relative to said lubricating composition.
A method for improving the antioxidancy and friction properties of a lubricant which comprises including in the lubricant a molybdenum compound which is at least substantially free of phosphorus and is at least substantially free of sulfur that becomes more acidic in the lubricant upon use, said molybdenum compound providing about 100 to 468 parts per million of molybdenum to the lubricant, and about 750 to 5000 parts per million of an oil soluble secondary diarylamine.
Dependencies are inferred from the claim text.