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US 4,466,901 AGranted
Molybdenum-containing friction modifying additive for lubricating oils
AssigneeStandard Oil Company (Indiana)
InventorsMack W. Hunt, Charles T. West
Life of this patent
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Abstract
Lubricating oil composition comprising the reaction product of a phenolic compound, a molybdenum, an amine and sulfur or a sulfur-yielding compound. Preferably, molybdenum oxide, an alkyl-substituted phenol having an alkyl side chain of at least 9 carbon atoms, an amine having at least one aliphatic hydrocarbon-based radical or aliphatic-substituted aromatic radical and elemental sulfur are reacted to produce the reaction product of the invention.
Claims7
An approved lubricating oil composition comprising a lubricating oil and a material consisting essentially of the reaction product of:
- (a) a phenolic compound comprising an alkyl-substituted phenol with the alkyl side chain having at least nine carbon atoms;
- (b) a molybdenum compound;
- (c) an amine compound comprising a mono- or polyamine having at least one aliphatic hydrocarbon based radical or an aromatic or aliphatic-substituted aromatic radical;
- and
- (d) sulfur or a sulfur-yielding compound, said sulfur and said maine compound being present in amounts that will provide a sulfur/amine molar ratio that is within the range of 1:1 to 60:1, said reaction product being prepared by adding the reactants in any order at room temperature to form a reaction mixture, heating subsequently said mixture to an elevated temperature and holding said mixture at said elevated temperature for a period of time, said temperature and said time being sufficient to cause the formation of said reaction product.
2 more elements
Dependencies are inferred from the claim text.