Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Morton Beltzer

Jacob Joseph Habeeb

Paul Joseph Berlowitz

Jeenok T Kim

Karla Schall Colle

Mark Alan Greaney

Edward Ira Stiefel

Max J Wisotsky

Nicholas Feldman

Catherine L Coyle

Manuel A Francisco

James N Francis

Thomas L Ashcraft

Terence Colclough

John W Frankenfeld

Joseph Vardi

Patrick Edward Godici

Oliver G Lewis

Jerome Panzer

Thomas Lee Ashcraft, Jr

Said Jahanmir

George S Musser

William L Petersen

Raymond C Craig

The present invention resides in a turbo oil composition exhibiting enhanced antioxidancy and resistance to deposit formation, and to a method for achieving that result in turbo oils. The gas turbine lubricating oil of the present invention comprises a major proportion of synthetic polyol ester based base stock including diesters and polyol esters, preferably polyol ester based base stock and a minor proportion of an antioxidant/deposit control additive, specifically a sulfur-containing carboxylic acid (SCCA) derivative. Other conventional additives such as extreme pressure, pour point reduction, oxidative stability, anti-foaming, hydrolytic stability, improved viscosity index performance, anti-wear, and corrosion inhibitor additives and others may also be employed. The use of SCCA derivative produces a turbo oil exhibiting markedly superior oxidation stability and deposit control performance compared to that exhibited by turbo oil without the SCCA derivative.

Sulfur-containing carboxylic acid derivatives to reduce deposit forming

A turbo oil possessing improved rust inhibiting properties is provided by adding to the turbo oil base stock minor amounts of monobasic aminophosphates and dicarboxylic acids. The use of the recited combination produces unexpected superior rust resistance performance as compared to use of the individual components. The turbo oil benefitted by the additive is preferably a polyol ester-based oil.

Rust resistant turbo oils containing monobasic amino phosphates and

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additives of the present invention are thiosemicarbazide and its derivative, and the P-containing component is one or more amine phosphates. The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than that obtained when each additive was used alone at a treat rate higher than or comparable to the total combination additive treat rate, and the lower concentration requirement of the P-based additive allows the turbo oil composition to meet U.S. Navy MIL-L-23699 requirement on the Si seal compatibility.

High load-carrying turbo oils containing amine phosphate and

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is sulfurized fatty acid (SFA), preferably the sulfurized oleic acid (SOA) and the P-containing additive is one or more amine phosphate(s). The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than or equivalent to that obtained when each additive was used alone at a treat rate higher than the total additive combination treat rate, and this lower additive concentration requirement allows the turbo oil composition to meet or exceed U.S. Navy MIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.

High load-carrying turbo oils containing amine phosphate and sulfurized

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is sulfur containing carboxylic acid (SCCA), preferably the C.sub.1 -C.sub.4 thioether carboxylic acid and the P-containing component is one or more amine phosphates. The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than that obtained when each additive was used alone at a comparable treat rate to the total combination additive treat rate, and this lower concentration requirement of each additive allows the turbo oil composition to meet or exceed US Navy MII-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.

High-load carrying turbo oils containing amine phosphate and a sulfur

An aviation turbine oil of reduced deposit forming tendencies and improved anti oxidancy is disclosed which comprises a major portion of a suitable aviation turbine oil base stock and a minor amount of a non-sulfur containing triazine derivative and trithiocyanuric acid, its substituted derivatives and mixture of such trithiocyanuric acid and its derivatives.

Additive combination to reduce deposit forming tendencies and improve

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is thiophene carboxylic acid (TCA) derivatives, preferably TCA per se or thiophene C.sub.1 -C.sub.4 alkanoic acid and the P-containing additive is one or more amine phosphate(s). The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than or equivalent to that obtained when each additive was used alone at a higher treat rate than the total P/S additive combination treat rate, and this lower concentration requirement of the P and S additive allows the turbo oil composition to meet or exceed US Navy MIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.

High load-carrying turbo oils containing amine phosphate and thiophene

An aviation turbo oil having improved load carrying ability (extreme pressure capacity) comprising a major portion of a base oil stock and a minor portion of a mercaptobenzoic acid or mixture of mercaptobenzoic acids.

Aviation turbine oils of improved load carrying capacity containing

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is 2-alkylthio-1,3,4-thiadiazole-5 alkanoic acid (ATAA) obtained by reacting 2,5-dimercapto-1,3,4-thiadiazole (DMTD) with alkyl bromide and subsequently reacting the intermediate with haloalkanoic acid. The P-containing additive is one or more amine phosphate(s). The turbo oil composition consisting of the dual P/S additives of the present invention achieves a superior load-carrying capacity over that obtained when each additive was used alone at individual treat rates higher than the total additive combination treatrate, and also meets or exceeds US Navy MIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.

Crankcase lubricant compositions for use in automobile or truck engines comprise a major amount of a lubricating oil, added copper present in oil-soluble form and an oil-soluble diamine sulphide. The specified additives provide a highly effective antioxidant system, which may be used, for example, in lubricating oils which are substantially free of phosphorus.

Lubricating compositions

Adducts of benzotriazole or substituted benzotriazole with formaldehyde or with thiadiazole or substituted thiadiazole are useful as ashless anti-wear/anti-friction/anti-oxidant additives for lubricants. Formulated lubricants containing such adducts exhibit compound levels of anti-wear, anti-friction and oxidation stability performance.

Ashless benzotriazole-thiadiazol compounds as anti-oxidant, anti-wear

The addition of trithiocyanuric acid to a lubricating oil basestock provides a lubricating oil composition showing improved antiwear, friction reducing and/or extreme pressure properties.

Lubricating oil compositions containing trithiocyanuric acid

A lubricating oil composition having improved antiwear, antioxidancy and fuel economy properties which comprises a lubricating oil basestock and an alkoxylated amine salt of a dihydrocarbyldithiophosphoric acid of the formula ##STR1## where R.sup.1 and R.sup.2 are each independently hydrocarbyl groups having from to 30 carbon atoms, R.sup.3 is a hydrocarbyl group of 2 to 22 carbon atoms, x and y are each independently integers from 1 to 15 with the proviso that the sum of x+y is from 2 to 20.

Lubricant composition containing alkoxylated amine salt of a

A composition of matter having utility in lubricant formulations, said composition being the reaction product of adenine, alkoxylated amine and dihydrocarbyldithiophosphoric acid and having the general formula (I): ##STR1## where R is hydrogen or a hydrocarbyl group of from 1 to 20 carbon atoms, R.sup.1 is a hydrocarbyl group of 2 to 22 carbon atoms, R.sup.2 and R.sup.3 are each independently hydrocarbyl groups having from 3 to 30 carbon atoms, x and y are each independently integers of from 1 to 15 with the proviso that the sum of x+y is from 2 to 20, and a, b and c are independent numbers from 1.0 to 3.0 wherein the ratios between a:b, a:c and b:c range from 1.0:3.0 to 3.0:1.0.

Ashless lube additives containing complexes of alkoxylated amines,

A lubricating oil composition having improved antiwear and fuel economy properties which comprises a lubricating oil basestock and an alkoxylated amine salt of a dihydrocarbyldithiobenzoic acid of the formula ##STR1## where R.sup.1 is a hydrocarbyl group having from 2 to 22 carbon atoms, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently hydrogen, a hydrocarbyl group containing from 1 to 24 carbon atoms or a hydroxy group with the proviso that at least one of R.sup.2 to R.sup.5 is a hydrocarbyl group, and x and y are each independently integers of from 1 to 15 with the proviso that the sum of x+y is from 2 to 20.

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Westfield, NJ, United States of America

Morton Beltzer