Antiwear additives
AssigneeMobil Oil Corporation
InventorsAndrew G. Horodysky, Shi-Ming Wu
Life of this patent
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Abstract
A multifunctional antiwear and antioxidant lubricant additive is the reaction product of a diacyl halide, a source of phosphorus or a source of phosphorus and an aryl amine. The diacyl halide is derived from a hydrocarbon-substituted succinic anhydride, suitably dodecenyl succinic anhydride, an alkoxylated amine and an inorganic acid halide, suitably thionyl chloride. A suitable source of phosphorus is dibutyl phosphite or bis(nonylphenyl)phosphite. A suitable aryl amine is N-octylphenyl-1-naphthylamine.
Claims25
A lubricant composition comprising a major proportion of lubricant and a minor multifunctional antioxidant and antiwear amount of an additive product comprising the reaction product of a hydrocarbon-substituted diacyl halide, derived from a hydrocarbon-substituted succinic ester-carboxylic acid and a halogenating agent, a source of phosphorus or a source of phosphorus and an aryl or alkaryl amine, the hydrocarbon group of the hydrocarbon-substituted succinic ester-acid contains from about 1 to about 300 carbon atoms.
A process for making a product of reaction suitable for use as a lubricant additive comprising (1) reacting a hydrocarbon-substituted succinic anhydride with an alkoxylated amine which is free of an active amino-hydrogen to produce a hydrocarbon-substituted ester-carboxylic acid;
- (2) reacting the hydrocarbon-substituted ester-carboxylic acid with an inorganic acid halide to produce a diacyl halide;
- and (3) reacting the diacyl halide with a source of phosphorus or a source of phosphorus and an aryl amine or an alkaryl amine.
A method of reducing wear between relatively moving surfaces comprising contacting the relatively moving surfaces with a reaction product of a hydrocarbon-substituted diacyl halide, derived from a hydrocarbon-substituted succinic ester-carboxylic acid and a halogenating agent, a source of phosphorus or a source of phosphorus and an aryl or alkaryl amine, the hydrocarbon group of the hydrocarbon-substituted succinic ester-acid contains from about 1 to about 300 carbon atoms.
A lubricating additive product prepared by a process comprising (1) reacting a hydrocarbon-substituted succinic anhydride with an alkoxylated amine which is free of an active amino-hydrogen to produce a hydrocarbon-substituted ester-carboxylic acid;
- (2) reacting the hydrocarbon-substituted ester-carboxylic acid with an inorganic acid halide to produce a diacyl halide;
- and (3) reacting the diacyl halide with a source of phosphorus or a source of phosphorus and an aryl amine or alkaryl amine.
Dependencies are inferred from the claim text.