The Lubrizol Corporation

James N. Vinci

Robert E. Quinn

James N Vinci

Curtis R Scharf

Stephen A DiBiase

Patricia R Todd

Paul E Adams

Craig D Tipton

James H Bush

Charles P Bryant

Robert E Quinn

Carmen V Luciani

Roger L Sowerby

James J Schwind

Syed Q Rizvi

David Price

Edward J Konzman

William R Sweet

Gary W Wiggins

Shubhamita Basu

Kent B Grover

Michael E Huston

Charla A Ramsey

Robert W Cain

Michael S Wragg

Denise R Vermilya

Thomas G Hach

S Q Rizvi

Edward S Akucewich

The present invention relates to lubricating compositions and particularly gear oil compositions that include a specific class of substituted triazoles, where the substituted triazole includes at least one hydrocarbyl group linked to one of the nitrogen atoms in the triazole ring. Such compositions provide surprisingly good seal compatibility compared to compositions with other triazoles and/or alternative additives.

Lubricants with improved seal compatibility

The present invention relates to industrial gear lubricating compositions that include a specific class of substituted triazoles, where the substituted triazole includes at least one hydrocarbyl group linked to one of the nitrogen atoms in the triazole ring. Such compositions provide surprisingly good seal compatibility compared to compositions with other triazoles and/or alternative additives.

The present technology includes an extreme pressure additive package formulated with a biodegradable sulfur component, which additive package can achieve suitable extreme pressure performance when formulated into a fully formulated industrial gear oil lubricant.

Industrial gear lubricant additive package with biodegradable sulfur component

The present invention relates to a lubricating composition containing (a) an ester-containing viscosity index improver; and (b) a polyoxyalkylene polyol. The invention further provides a method for lubricating a mechanical device with the lubricating composition.

Lubricant compositions

The invention relates to a lubricating composition comprising: (a) at least one sulfur-free hydrocarbyl phosphoric acid ester or salt, (b) at least one sulfur-containing hydrocarbyl phosphoric acid or salt, (c) an organic polysulfide, (d) at least one dispersant, and (e) at least one triazole metal deactivator. The composition may also include a thiadiazole derivative. This additive combination provides good antiwear and thermal stability properties, even under severe thermal conditions. These compositions also have good demulsibility properties. The above combination of additives provides the antiwear and extreme-pressure protection necessary for automotive and industrial gear applications. These additives additionally provide this protection without adversely effecting demulsibility properties of the lubricant.

Lubricating compositions with good thermal stability and demulsibility properties

This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and (A) a di or trihydrocarbyl phosphite, (B) at least one reaction product of a di or trihydrocarbyl phosphite and sulfur or a source of sulfur; at least one di or trihydrocarbyl monothiophosphate; or salt thereof, and (C) a salt of a hydrocarbyl phosphoric acid ester. In one embodiment, the lubricant composition contains less than 0.1% phosphorus or less than about 0.75% borated dispersant. This combination of phosphorus compounds provides antiwear and thermal stability to lubricants, even at low phosphorus levels. The lubricating compositions containing the combination of the phosphorus compounds has low corrosivity to copper and low odor as well.

Mixed phosphorus compounds and lubricants containing the same

A method and compositions for reducing friction between relatively slideable components is described comprising applying to a slideably engaging surface of the slideable components a lubricating amount of at least one Newtonian, or non-Newtonian, metal overbased salt of a carboxylic acid wherein the metal is selected from the group consisting of lithium, calcium, sodium, barium, magnesium, and mixtures thereof, and the carboxylic acid comprises at least one linear unsaturated hydrocarbon group containing from about 8 to about 50 carbon atoms. The types of slideable components contemplated include flat bearings, rotating bearings, lead screws and nuts, gears, hydraulic systems, and pneumatic devices. The inventors have discovered that applying a metal overbased salt of the aforesaid carboxylic acids results in a remarkable reduction in static and dynamic coefficients of friction and provides anti-wear protection of an extreme pressure agent without requiring auxiliary friction-modifying agents or auxiliary extreme pressure agents.

Methods for reducing friction between relatively slideable components

Functional fluids comprising an oil of lubricating viscosity, the reaction product of an amine and a sulfonic acid, and at least one sulfur-containing compound of the structure

Metal free hydraulic fluid with amine salt

This invention relates to improved grease compositions comprising a major amount of an oil based simple metal soap thickened base grease and a minor amount of at least one phosphorus and boron containing composition, said phosphorus and boron containing composition prepared by reacting a combination of (A) at least one boron compound and (B) at least one phospholipid. In one embodiment, the phosphorus and boron containing composition is present in amounts sufficient to improve the extreme pressure, antiwear and lubricity properties of the base grease. In another embodiment the phosphorus and boron containing composition is present in amounts sufficient to increase the dropping point of the base grease, as determined by ASTM procedure D-2265, by at least 20.degree. C.

Grease compositions

Gelled overbased materials are prepared by mixing an overbased composition of a metal salt of an organic acid material containing at least 8 carbon atoms, a metal salt of an organic acid material containing fewer than 6 carbon atoms, and a metal carbonate in an oleophilic medium, with an alcohol or an alcohol-water mixture, and heating the mixture.

Mixed carboxylate overbased gels

Improved grease compositions comprise a major amount of an oil based metal soap thickened base grease selected from the group consisting of complex and failed complex greases, at least one sulfur and phosphorus containing composition alone or together with an overbased metal salt of an organic acid and a hydrocarbyl phosphite, in amounts sufficient to increase the dropping point of the base grease, as measured by ASTM Procedure D-2265 by at least 15.degree. C., the phosphorus and sulfur compound being described in detail herein.

Nitrogen containing carboxylic compounds useful in reducing hydrogen sulfide are described herein. The compositions of the invention also desirably contain an alkali or alkaline earth metal containing compound.

Compositions containing active sulfur

A lubricating composition is described which comprises a mixture of (A) a major amount of an oil of lubricating viscosity, (B) a dispersant effective amount of at least one ashless dispersant, and (C) a minor, effective amount of at least one demulsifier characterized by the formula ##STR1## wherein R is a hydrocarbyl group, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each independently H or hydrocarbyl groups, and X is O or NR' wherein R' is hydrogen or a hydrocarbyl group. In one embodiment, the ashless dispersant is a carboxylic dispersant, and the demulsifier is a derivative of imidazoline. The lubricating compositions of the invention are characterized as having improved dispersancy, demulsibility, rust-inhibition and anti-wear properties.

Lubricant and functional fluid compositions exhibiting improved

Improved grease compositions comprise a major amount of an oil based simple metal soap thickened base grease, an overbased metal salt of an organic acid, at least one sulfur and phosphorus containing composition and a hydrocarbyl phosphite, together in amounts sufficient to increase the dropping point of the base grease, as measured by ASTM Procedure D-2265 by at least 50.degree. C., the phosphorus and sulfur compound being described in detail herein.

A method for reducing friction between railroad wheel and railway track is disclosed comprising applying to the railway track a composition comprising an overbased non-Newtonian colloidal disperse system comprising: (1) solid metal-containing colloidal particles predispersed in (2) a disperse medium of at least one inert organic liquid and (3) at least one member selected from the class consisting of organic compounds which are substantially soluble in the disperse medium, the molecules of said organic compound being characterized by polar substituents and hydrophobic portions.

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Mayfield Heights, OH, United States of America

James N Vinci