Additive composition for industrial fluid
AssigneeThe Lubrizol Corporation
InventorBetsy J. Butke
Life of this patent
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Abstract
A lubricating oil composition containing in oxidation inhibitor package, a rust inhibitor and metal deactivator is used in industrial fluids. The oxidation package contains alkylated diphenylamines, substituted hydrocarbyl monosulphides and optionally sterically hindered phenols. The rust inhibitor contains at least 1 of alkylated amine salts of alkylphosphoric acid, dialkyldithiophosphoric acid or hydrocarbyl aryl sulphonic acids. The metal deactivator is 5-methylbenzotriazole.
Claims20
A lubricating oil composition comprising:
- a) an oxidation package comprising:
- (i) an alkylated diphenylamine,
- (ii) a substituted hydrocarbyl monosulphide, and
- (iii) optionally, a sterically hindered phenol;
- b) a rust inhibitor selected from the group comprising hydrocarbyl amine salts of alkylphosphoric acid, hydrocarbyl amine salts of dialkylphosphoric acid, hydrocarbyl amine salts of hydrocarbyl aryl suiphonic acid or mixtures thereof;
- c) a metal deactivator;
- d) optionally other additives;
- and
- e) an oil of lubricating viscosity.
A process to prepare a lubricating oil composition comprising the steps of:
- a) mixing a metal deactivator selected from the group comprising hydrocarbyl substituted benzotriazole, 5-methylbenzotriazole and mixtures thereof, in hydrocarbyl amine salts selected from the group consisting of alkylphosphoric acid. hydrocarbyl amine salts of dialkylphosphoric acid, hydrocarbyl amine salts of hydrocarbyl aryl sulphonic acid or mixtures thereof;
- and
- b) adding and mixing the oxidation package selected from the group comprising an alkylated diphenylamine, a substituted hydrocarbyl monosulphide and mixtures thereof to the resultant mixture sequentially, separately or combinations thereof;
- and
- c) adding and mixing the resultant mixture into the base oil or mixtures thereof.
A process to prepare a concentrate of a lubricating oil composition comprising the steps of:
- a) mixing substantially all of a metal deactivator in hydrocarbyl amine salts selected from the group comprising of alkylphosphoric acid, hydrocarbyl amine salts of dialkylphosphoric acid, hydrocarbyl amine salts of hydrocarbyl aryl sulphonic acid or mixtures thereof to form a mixture;
- and
- b) adding and mixing substantially all of the oxidation package selected from the group comprising an alkylated diphenylamine, a substituted hydrocarbyl monosulphide and mixtures thereof to the resultant mixture sequentially, separately or combinations thereof;
- and
- c) adding with mixing to the resultant mixture a sufficient portion of the base oil or mixtures thereof to form a concentrate of the lubricating oil composition.
A lubricating oil composition for use as an industrial fluid, hydraulic fluid, turbine oil, circulating oil or combinations thereof wherein the lubricating oil composition comprises:
- a) an oxidation package comprising:
- (i) an alkylated diphenylamine,
- (ii) a substituted hydrocarbyl monosulphide,
- (iii) about 0 to about 10 weight percent of a sterically hindered phenol
- b) a rust inhibitor selected from the group comprising hydrocarbyl amine salts of alkylphosphoric acid, hydrocarbyl amine salts of dialkylphosphoric acid, hydrocarbyl amine salts of hydrocarbyl aryl sulphonic acid or mixtures thereof;
- c) a metal deactivator;
- and
- d) an oil of lubricating viscosity.
Dependencies are inferred from the claim text.