TWI634204B - Method for imparting reduced gearbox operating temperatures - Google Patents

Abstract

The present invention relates to an improved industrial gear oil composition that substantially reduces the operating temperature of a gear box using the gear oil composition. The reduced operating temperature provided by the described composition results in improved equipment performance. The invention also relates to a method of manufacturing the described industrial gear oil composition and a method of using the same.

Description

Give a method to reduce the operating temperature of the gearbox

The present invention relates to an improved gear oil composition that substantially reduces the operating temperature of a gear box using the gear oil composition. The reduced operating temperature provided by the described composition results in improved equipment performance. The invention also relates to a method of manufacturing the described gear oil composition and a method of using the same.

Industrial gearboxes experience extreme operating conditions that can cause damage, such as wear on the internal components of the gearbox. This damage will reduce the life of the industrial gearbox, and will lead to high prices for the equipment containing the industrial gearbox and extended maintenance, repair costs, unplanned downtime and similar problems.

There is a continuing need for improved industrial gearbox lubricants that provide better performance and protection for industrial gearboxes, thus extending the effective life of the industrial gearboxes and equipment containing them.

One way to protect the industrial gearbox and extend the life of the fluid that lubricates it is to reduce its operating temperature. It is generally known that prolonged exposure to the high temperatures that industrial gearboxes normally operate will increase the wear of gearbox parts And tearing, eventually causing parts damage. This negative impact of the high operating temperature is the result of multiple forces, including but not limited to the fact that high temperatures can accelerate the failure of the protective additive and increase the oxidation of the base fluid present in the lubricant of the industrial gearbox, thus allowing the gearbox parts to follow Take time to have lower protection. Reducing the operating temperature of industrial gearboxes will result in improved performance over time.

One way to reduce the operating temperature of industrial gearboxes is to use external coolers or add heat sinks. However, this method has limitations and can include the costly and time-consuming modification of existing equipment. There is a need for a method of reducing the operating temperature of industrial gearboxes in existing equipment without requiring this modification.

An alternative to reduce the operating temperature of the gearbox would be to operate the equipment at a lower degree (lower load, lower power, lower speed, etc.). However, this method often results in reduced manufacturing and / or efficiency, which is not an attractive option for equipment operators who are trying to maintain productivity. Instead, there is a need for industrial gearbox lubricants that can reduce the operating temperature of industrial gearboxes without sacrificing the degree of operation (equipment load, power, speed, etc.).

It has now been found that the industrial gearbox lubricant composition of the present invention can provide a reduction in the operating temperature of industrial gearboxes and no other changes to equipment operating conditions.

The present invention provides an industrial gear composition comprising: (a) an oil of lubricating viscosity; (b) an industrial gear lubricant additive package; and (c) a fatty phosphite ester, which is not less than that of the overall composition 1.0 weight The percentage exists. The present invention is not directed to automotive gear compositions and / or lubricants, but focuses on industrial gear oil compositions and / or lubricants that address the unique problems seen in industrial gearbox applications.

The present invention provides the described composition, wherein the component (b), packaged with industrial gear lubricant additives, may include one or more anti-wear additives and / or extreme pressure agents, one or more rust and / or corrosion inhibitors , One or more foam inhibitors, one or more demulsifiers, or any combination thereof. The component (b), which is packaged with additives for industrial gear lubricants, may further include one or more friction modifiers.

The present invention further provides the component (b), an industrial gear lubricant additive package, which further includes: one or more sulfurized olefins or polysulfides; one or more phosphorus amine salts; one or more phosphorothioates, one or more Thiadiazoles, tolyltriazoles, polyethers and / or alkenylamines; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants, cleaning agents, or any of them combination.

The invention provides a concentrate composition and a lubricant composition. The described industrial gear additive concentrate may contain up to 49 weight percent of component (a). The described industrial gear lubricant may contain at least 80 weight percent of component (a). The component (b) may be present at 1 to 5 weight percent of the overall industrial gear lubricant; and the component (c) may be present at 1.0 to 5.0 weight percent of the overall industrial gear lubricant.

The present invention further provides a method for reducing the operating temperature of an industrial gearbox. The steps of the method include: (I) adding fatty phosphite to an industrial gear oil lubricant so that the lubricant contains at least 1.0 weight percent of fatty phosphite ; And (II) When the industrial gear oil is lubricated When the agent is supplied to the industrial gearbox, the industrial gearbox is operated.

The present invention further provides a method of reducing the operating temperature of an industrial gearbox. The steps of the method include: (I) supplying the industrial gearbox with the lubricant composition described herein, and (II) operating the industrial gearbox. In any of these specific examples, the fatty phosphite may be added to the industrial gear oil lubricant before the lubricant system is supplied to the industrial gear box; or after the lubricant system is supplied to the industrial gear box, the At least a portion of the fatty phosphite is added to the industrial gear oil lubricant.

The present invention provides the use of the described fatty phosphites in industrial gear lubricant compositions to reduce the operating temperature of industrial gearboxes using the lubricant compositions. The invention also provides the use of the described industrial gear lubricant composition to reduce the operating temperature of industrial gearboxes using the lubricant composition.

Detailed description of the invention

Various features and specific examples of the present invention will be described below by way of non-limiting clarification.

The industrial gear composition of the present invention includes: (a) oil of lubricating viscosity; (b) industrial gear lubricant additive package; and (c) fatty phosphite, which is not less than 1.0 weight percent of the overall composition presence. In some embodiments, the industrial gear lubricant additive package may include demulsifiers, dispersants, and metal deactivators. Contains a minimum of 1.0 weight percent fatty phosphite because it is believed that at least some specific For example, at least this amount of fatty phosphite is required to see the benefits described in the industrial gear oil composition, that is, to reduce the gearbox operating temperature. The extent to which the benefits of the present invention are seen is expected to vary and / or slightly depend on the base fluid used.

Lubricating oil

The oil of lubricating viscosity may be present in the lubricant composition in a major amount; or may be present in the concentrate and / or additive composition in the form of a concentrate.

Suitable oils include natural and synthetic lubricating oils and mixtures thereof. In a fully formulated lubricant, the oil of lubricating viscosity is usually present in a major amount (ie, its amount is greater than 50 weight percent). Typically, the lubricating viscosity oil system is present in an amount of 75 to 98 weight percent, and is often greater than 80 weight percent of the overall composition.

The oil of lubricating viscosity may include natural and synthetic oils, oils from hydrocracking, hydrogenation and hydrofinishing, unrefined, refined and re-refined oils or mixtures thereof. Unrefined oils are obtained directly from natural or synthetic sources and usually have no (or slight) further purification treatment. Refined oils are similar to unrefined oils, except that they have been further processed in one or more purification steps to improve one or more properties. Purification techniques are known in the art and include solvent extraction, secondary distillation, acid or base extraction, filtration, diafiltration and similar methods. Re-refined oil is also known as recycled or reprocessed oil, and it is obtained by methods similar to those used to obtain refined oil. Re-refined oils are often processed by techniques aimed at removing used additives and oil breakdown products.

Natural oils useful as oils of this lubricating viscosity include animals Oils and vegetable oils (for example, castor oil, lard); mineral lubricating oils, such as kerosene (liquid petroleum oils) and paraffin, naphthenic or mixed paraffinic naphthenic types of solvent-treated or acid-treated mineral lubricants And oil from coal or shale; or mixtures thereof.

The synthesis of the lubricating viscosity oil includes hydrocarbon oils, such as polymerized and interpolymerized olefins (for example, polybutenes, polypropylenes, propylene isobutylene copolymers); poly (1-hexene), poly (1-octene) Olefins), poly (1-decenes) and mixtures thereof; alkylbenzenes (eg, dodecylbenzenes, tetradecylbenzenes, dinonylbenzenes, di- (2-ethyl Hexyl) -benzenes); polybenzenes (eg, biphenyls, triphenyls, alkylated polyphenyls); alkylated biphenyl ethers and alkylated biphenyl sulfides and derivatives ; Its analogues and homologues; or mixtures thereof. In some specific examples, the oil-based synthetic oil of lubricating viscosity used in the present invention, which includes polymerized polyisobutylene; and in some specific examples, the oil-based synthetic oil of lubricating viscosity used in the present invention, It includes polymerized polyisobutylene and polyalphaolefin.

Another lubricating viscosity synthetic oil includes polyol esters, dicarboxylic acid esters, and phosphoric acid-containing liquid esters (e.g., phosphoric acid) in addition to the hydrocarbyl-capped polyoxyalkylene polyols as disclosed herein Tricresyl ester, trioctyl phosphate and diethyl ester of decanephosphonic acid), or polymerized tetrahydrofurans. Synthetic conventional oils of lubricating viscosity also include those made by the Fischer-Tropsch reaction, and Fischer-Tropsch hydrocarbons or waxes that can be typically hydroisomerized. In a specific example, the lubricating viscosity oil can be prepared by the Fischer-Tropsch gas-to-liquid synthesis procedure and other gas liquefied oils.

The oil of lubricating viscosity can be further defined as specified in the American Petroleum Institute (API) Base Oil Interchangeability Guidelines. The five base oil groups are as follows: Group I (sulfur content> 0.03 weight percent, and / or <90 weight percent saturation, viscosity index 80-120); Group II (sulfur content 0.03 weight percent, and 90% by weight saturation, viscosity index 80-120); Group III (sulfur content 0.03 weight percent and 90 weight percent saturation, viscosity index 120); Group IV (all polyalphaolefins, or PAOs, such as PAO-2, PAO-4, PAO-5, PAO-6, PAO-7, or PAO-8); and Group V (which includes "" All others "). The lubricating viscosity oil includes API Group I, Group II, Group III, Group IV, Group V oils or mixtures thereof. In a specific example, the lubricating viscosity oil is API Group I, Group II, Group III, Group IV oil, or a mixture thereof. Furthermore, the oil of lubricating viscosity is often API Group II, Group III or Group IV oil or mixtures thereof.

In certain specific examples, the lubricating oil component of the present invention includes Group II or Group III base oils or combinations thereof. The oil can also come from the hydroisomerization of waxes, such as slack wax or Fischer-Tropsch synthetic wax. This "gas liquefied" oil is typically characteristic of Group III.

The composition of the present invention may include certain amounts of Group I base oils, and even Group IV and Group V base oils. However, in certain embodiments, the lubricating oil component of the present invention includes no more than 20, 10, 5, or even 1 weight percent of Group I base oil. These restrictions can also be applied to Group IV or Group V base oils. In other specific examples, the lubricating oil present in the composition of the present invention is at least 60, 70, 80, 90, or even 98 weight percent of Group II and / or Group III base oils. In some specific In the examples, the lubricating oil present in the composition of the present invention is basically only the Group II and / or Group III base oil, in which a small amount of other types of base oil may be present, but the amount does not significantly impact the overall composition The nature or performance of things.

In certain embodiments, the compositions of the present invention include certain amounts of Group I and / or Group II base oils. In other specific examples, the composition of the present invention is a lubricating composition, wherein the oil of lubricating viscosity is mainly a Group I and / or Group II base oil, or even substantially Group I and / or Group II base Oil, or even the only Group I and / or Group II base oil.

In some specific examples, the present invention provides a group II composition, which is an oil including the lubricating viscosity of group II oil, and if not the only group II oil, it may even be mainly group II oil, while still Provide performance of synthetic oil composition. This is one of the benefits of the present invention.

Oils with various lubricating viscosities as described can be used alone or in combination. The lubricating viscosity oil can be used in the described industrial gear lubricants in the range of about 80 weight percent to about 98 weight percent, or it can be 80, 85, 90, 95, 97 or even 97.5 or 98 weight percent oil or up to 90, 95, 97, 97.5 or even 98 weight percent oil. The lubricating viscosity oil can be used in the described industrial gear additive concentrate as a diluent in the range of about 1 weight percent to about 49 weight percent, or it is a 1, 5, or even 10 weight percent oil, up to 10, 20, 30, 40 or even 45 or 49 weight percent oil.

Industrial gear lubricant additive package

The composition of the present invention includes an industrial gear additive package. In other words, the composition of the present invention is designed as an industrial gear lubricant, or an additive package for manufacturing it. The present invention does not concern the gears of automobiles Lubricant or other lubricating composition.

In some specific examples, the industrial gear lubricant additive package includes demulsifier, dispersant and metal deactivator. Any combination of conventional additive packages designed for industrial gear applications can be used. The present invention inherently assumes that this additive package is substantially free of the fatty phosphite of the present invention, or at least does not include the fatty phosphite type in the amounts specified in detail by the present invention.

Additives that may be present in the industrial gear additive package include foam inhibitors, demulsifiers, pour point depressants, antioxidants, dispersants, metal deactivators (such as copper deactivators), antiwear agents, extreme pressure Agents, viscosity modifiers or some of their mixtures. Each of the additives may be present in the range of 50, 75, 100 or even 150 ppm up to 5, 4, 3, 2 or even 1.5 weight percent, or 75 ppm to 0.5 weight percent, 100 ppm to 0.4 weight percent, or 150 ppm to 0.3 weight percent, where the weight percent value relates to the overall lubricating oil composition. However, it should be noted that certain additives, including viscosity-modifying polymers (which can be regarded as part of the base fluid) can be present in higher amounts, including up to 30, 40 or even 50% by weight, when When considered separately from this basic fluid. The additive can be used alone or in a mixture thereof.

Anti-foaming agents are also known as foaming inhibitors, which are known in the art and include, but are not limited to, organopolysiloxane and non-silicone foaming inhibitors. Examples of the organic polysiloxane include dimethyl polysiloxane and polysiloxane. Examples of the non-silicone foam inhibitor include but are not limited to polyether, polyacrylate and mixtures thereof, and ethyl acrylate, 2-ethylhexyl acrylate And selective vinyl acetate copolymer. In certain embodiments, the anti-foaming agent is polyacrylate. The anti-foaming agent may be present in the composition from 0.001 to 0.012 or 0.004 pbw or even from 0.001 to 0.003 pbw.

The demulsifier is known in the art and includes but is not limited to propylene oxide, ethylene oxide, polyoxyalkylene alcohols, alkylamines, amino alcohols, diamines or polyamines in succession with ethylene oxide Or derivatives of substituted ethylene oxide or mixtures thereof. Examples of the demulsifier include polyethylene glycols, polyethylene oxides, polypropylene oxides, (ethylene oxide-propylene oxide) polymers, and mixtures thereof. In some specific examples, the demulsifier is a polyether. The demulsifier may be present in the composition from 0.002 to 0.2 pbw.

The pour point depressant is known in the art and includes, but is not limited to, maleic anhydride-styrene copolymer esters, polymethacrylates; polyacrylates; polypropylene amides; haloparaffin waxes) condensation products with aromatic compounds; vinyl carboxylate polymers; and terpolymers of dialkyl fumarates, vinyl esters of fatty acids, ethylene-vinyl acetate copolymers, alkylphenol formaldehyde condensation Resins, alkyl vinyl ethers and their mixtures.

In addition to some of the above additives, the composition of the present invention may include a rust inhibitor. Suitable rust inhibitors include hydrocarbyl amine salts of dialkyl dithiophosphates; hydrocarbyl amine salts of hydrocarbyl aromatic sulfonic acids, fatty carboxylic acids or their esters; esters of nitrogen-containing carboxylic acids, ammonium sulfonate, imidazoline, mono Thiophosphate, or any combination thereof; or a mixture thereof. Examples of the hydrocarbylamine salt of the dialkyl dithiophosphate of the present invention include, but are not limited to, the above, and diheptyl or dioctyl or dinonyl dithiophosphate with ethylenediamine, morpholine or Primene ^TM 81R Or the reaction product of a mixture thereof. A suitable hydrocarbyl amine salt of the hydrocarbyl aromatic sulfonic acid used in the rust inhibitor package of the present invention is represented by the following formula: Cy is benzene or naphthalene ring. R ¹ is a hydrocarbon group having about 4 to about 30, preferably about 6 to about 25, and more preferably about 8 to about 20 carbon atoms. z is independently 1, 2, 3, or 4, and most preferably, z is 1 or 2. R ² , R ³ and R ⁴ are the same as described above. Examples of the hydrocarbyl amine salt of the hydrocarbyl aromatic sulfonic acid of the present invention include, but are not limited to, the ethylene diamine salt of dinonyl naphthalene sulfonic acid. Examples of suitable fatty carboxylic acids or their esters include glyceryl monooleate and oleic acid. Examples of suitable esters of nitrogen-containing carboxylic acids include oleylsarcosinate. The range of the rust inhibitor may be 0.02 to 0.2, 0.03 to 0.15, 0.04 to 0.12, or 0.05 to 0.1 weight percent of the lubricating oil composition. The rust inhibitor of the present invention can be used alone or as a mixture thereof.

The composition of the present invention may also include a metal deactivator. The metal deactivator is used to neutralize the catalytic effect of the metal to promote oxidation in the lubricating oil. Suitable metal deactivators include, but are not limited to triazoles, tolyltriazoles, thiadiazoles, or combinations thereof, and derivatives thereof. Examples include derivatives of benzotriazoles, benzimidazole, 2-alkyldithiobenzimidazole, 2-alkyldithiobenzothiazole, 2- (N, N'-di Alkyldisulfide-aminomethylacetoyl) benzothiazole, 2,5-bis (alkyl- (Dithio) -1,3,4-thiadiazole, 2,5-bis (N, N′-dialkyldithiodimethanyl) -1,3,4-thiadiazole, 2-alkane Dithio-5-mercaptothiadiazole or mixtures thereof. These additives may be used in the overall composition at 0.01 to 0.25 weight percent. In some specific examples, the metal deactivator is a benzotriazole compound substituted with a hydrocarbyl group. The benzotriazole compound having a hydrocarbyl substituent includes at least one of the following ring positions 1- or 2- or 4- or 5- or 6- or 7-benzotriazole. The hydrocarbon group includes about 1 to about 30, preferably about 1 to about 15, more preferably about 1 to about 7 carbon atoms, and most preferably, the metal deactivator is 5-methylbenzotriazole , Which is used alone or as a mixture thereof. The metal deactivator may be present in the range of 0.001 to 0.5, 0.01 to 0.04 or 0.015 to 0.03 pbw of the lubricating oil composition. The metal deactivator may also be present in the composition at 0.002 or 0.004 to 0.02 pbw. The metal deactivator can be used alone or in a mixture thereof.

Antioxidants may also be present, including (i) alkylated diphenylamine, and (ii) substituted hydrocarbyl monosulfide. In some specific examples, the alkylated diphenylamines of the present invention are bisnonylated diphenylamine and bisoctylated diphenylamine. In some specific examples, the substituted hydrocarbyl monosulfide includes n-dodecyl-2-ethylsulfide, 1- (tertiary dodecylthio) -2-propanol, or a combination thereof . In some specific examples, the substituted hydrocarbyl monosulfide is 1- (tertiary dodecylthio) -2-propanol. The antioxidant package may also include sterically hindered phenols. Examples of suitable hydrocarbon groups for the sterically hindered phenol include, but are not limited to, 2-ethylhexyl or n-butyl ester, dodecyl, or mixtures thereof. Examples of methylene-bridged sterically hindered phenols include, but are not limited to 4,4’-methylene-bis (6-tertiarybutyl-o-cresol), 4,4’-methylene Methyl-bis (2-tertiary pentyl-o-cresol), 2,2'-methylene-bis (4-methyl-6-tertiary butylphenol), 4,4'-methylene Bis- (2,6-di-tertiary butylphenol) or mixtures thereof.

In certain embodiments, the industrial gear lubricant additive package of the present invention includes a nitrogen-containing dispersant, such as a hydrocarbon-containing nitrogen-containing additive. Suitable nitrogen-containing additives substituted with hydrocarbon groups include ashless dispersants and polymer dispersants. The ashless dispersants are specified as such because when supplied, they do not contain metals, and therefore do not normally contribute to sulfated ash when added to the lubricant. However, once they are added to lubricants that include metal-containing species, they can of course interact with the surrounding metals. The ashless dispersant is characterized by polar groups attached to relatively high molecular weight hydrocarbon chains. Examples of this material include succinimide dispersants, Mannich dispersants and their borated derivatives.

In some embodiments, the industrial gear lubricant additive package of the present invention includes a sulfur-containing compound. Suitable sulfur-containing compounds include sulfurized olefins and polysulfides. The sulfurized olefin or polysulfide can be derived from isobutylene, butene, propylene, ethylene, or some combination thereof. In certain embodiments, the sulfur-containing compound is a sulfurized olefin from any of the natural or synthetic oils described above, or even some combination thereof. For example, the sulfurized olefin can come from vegetable oil.

In some embodiments, the industrial gear additive package includes one or more phosphorus amine salts, but in an amount such that the additive package, or in other embodiments, the produced industrial gear lubricant composition includes no more than 1.0 weight Percentage of this material, or even no more than 0.75 Or 0.6 weight percent. In other specific examples, the industrial gear additive package or the resulting industrial gear lubricant composition is substantially free or even completely free of phosphorus amine salts.

In some specific examples, the component (b), which is packaged with an industrial gear lubricant additive, contains one or more anti-wear additives and / or extreme pressure agents, one or more rust and / or corrosion inhibitors, Multiple foam inhibitors, one or more demulsifiers, or any combination thereof.

In some specific examples, the industrial gear additive package or the resulting industrial gear lubricant composition is substantially free or even completely free of phosphorus amine salts, dispersants, or both.

In some specific examples, the industrial gear additive package or the produced industrial gear lubricant composition includes a demulsifier, a corrosion inhibitor, a friction modifier, or a combination of two or more thereof. In some specific examples, the corrosion inhibitor includes tolyltriazole. In still other specific examples, the industrial gear additive package or the resulting industrial gear lubricant composition includes one or more sulfurized olefins or polysulfides; one or more phosphorus amine salts; one or more phosphorothioates, one or Various thiadiazoles, tolyltriazoles, polyethers and / or alkenylamines; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants, or any combination thereof.

The industrial gear additive package may be present in the overall industrial gear lubricant at 1 to 5 weight percent, or in other specific examples 1, 1.5 or even 2 weight percent up to 2, 3, 4, 5, 7 or even 10 Weight percentage. The amount of the industrial gear additive package that can be present in the industrial gear concentrate composition of the present invention is the A relative amount; where this value considers the absence of oil (ie, it can be taken as the pbw value along with the actual amount of oil present).

Fatty phosphite

The composition of the present invention includes fatty phosphite, which is present in not less than 1.0 weight percent of the overall lubricant composition.

Suitable phosphites include those having at least one hydrocarbon group containing 4 or more, or 8 or more, or 12 or more carbon atoms. A typical range of the number of carbon atoms of the hydrocarbon group includes 8 to 30, or 10 to 24, or 12 to 22, or 14 to 20, or 16 to 18. The phosphite may be a phosphite substituted with a monohydrocarbyl group, a phosphite substituted with a dihydrocarbyl group, or a phosphite substituted with a trihydrocarbyl group. In a specific example, the phosphite is sulfur-free, that is, the phosphite is not sulfur phosphite.

The phosphite having at least one hydrocarbon group containing 4 or more carbon atoms can be represented by the following formula: At least one of R ⁵ , R ⁶ and R ⁷ may be a hydrocarbon group containing at least 4 carbon atoms and other hydrogen or hydrocarbon groups. In a specific example, R ⁵ , R ⁶ and R ^{7 are} all hydrocarbon groups. The hydrocarbon group may be an alkyl group, a cycloalkyl group, an aryl group, an acyclic group, or a mixture thereof. In the formula containing all three groups R ⁵ , R ⁶ and R ⁷ , the compound may be a phosphite substituted with a trihydrocarbyl group, that is, all of R ⁵ , R ⁶ and R ⁷ are hydrocarbon groups.

The alkyl group can be linear or branched, typically linear; and saturated or unsaturated, typically saturated. Examples of alkyl groups for R ⁵ , R ⁶ and R ⁷ include octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecane Group, pentadecyl, hexadecyl, heptadecyl, octadecyl, octadecenyl, nonadecyl, eicosyl or mixtures thereof.

In certain embodiments, the fatty phosphite component of the present invention and / or the composition as a whole is substantially free or even completely free of phosphate esters and / or amine salts thereof.

In some specific examples, the fatty phosphite comprises alkenyl phosphite or an ester thereof, for example, an ester of dimethyl hydrogen phosphite.

The fatty phosphite may be present in the overall industrial gear lubricant at 1.0 to 10.0 weight percent, or in other specific examples 1, 1.5 or even 2 weight percent up to 1.5, 1.9, 2, 3, 4, 5, 7 or even 10 weight percent. The amount of industrial gear additive package that may be present in the industrial gear concentrate composition of the present invention is the amount corresponding to the above weight percentage; where this value is considered to be free of oil (ie, it can be taken together with the actual amount of oil present As pbw value).

In some specific examples, the ratio of the industrial gear additive package component (component (b)) to the fatty phosphite component (component (a)), based on the weight of oil-free, is 1: 0.5 to 1: 1.5. In still further specific examples, the ratio of this component (b) :( c) is 1: 0.5 to 1: 1.5, or 1: 0.6 to 1: 1.2, or 1: 0.7 to 1: 1.1, or 1: 0.8 To 1: 1.0.

Industrial applications

As mentioned above, the present invention includes industrial gear lubricants and industrial gear additive concentrates that can be used to make industrial gear lubricants both.

In the industrial gear lubricant of the present invention: the component (a), the oil of lubricating viscosity, can be 80, 85, 90, 95, 97 or even 97.5 or 98 weight percent of the oil up to 90, 95, 97, 97.5 or even 98 weight percent present; this component (b), packaged with industrial gear lubricant additives, can be present at 1, 1.5 or even 2 weight percent up to 2, 3, 4, 5, 7 or even 10 weight percent; and This component (c), fatty phosphite, may be present at 1, 1.5 or even 2 weight percent up to 1.5, 1.9, 2, 3, 4, 5, 7, or even 10 weight percent.

In the industrial gear additive concentrate of the present invention: the component (a), the oil of lubricating viscosity, can be 1, 5, or even 10 weight percent of the oil up to 10, 20, 30, 40 or even 45 or 49 weight Percentage present; the component (b), packaged with industrial gear lubricant additives, can be present at 20, 25, 25.5, 27.5, 30, 35, 45 or even 45 weight percent up to 45, 47.5 or even 49.5 weight percent; and the Component (c), fatty phosphite, may be present at 25.5, 27.5, 30, 35, 45 or even 45 weight percent up to 45, 47.5 or even 49.5 weight percent.

In some specific examples, the ratio of the industrial gear additive packaging component (component (b)) to the fatty phosphite component (component (a)), based on the weight of the oil, is 1: 0.5 to 1: 1.5. In still further specific examples, the ratio of the components (b) :( c) is 4: 1 to 1: 5, or 2: 1 to 1: 5, or 1: 1 to 1: 5, or 1: 0.5 To 1: 1.5, or 1: 0.6 to 1: 1.2, or 1: 0.7 to 1: 1.1, or 1: 0.8 to 1: 1.0. These ratios can be applied to the industrial gear lubricant of the present invention and / or Or to the industrial gear additive concentrate of the present invention.

The present invention includes a method for manufacturing the above-mentioned industrial gear lubricant and / or industrial gear additive concentrate. Such methods include mixing the described components together. It is believed that no particular order or method of addition will significantly affect the results.

The invention also includes a method for reducing the operating temperature of industrial gearboxes. The method includes the following steps: (I) adding fat phosphite to the industrial gear oil lubricant, so that the lubricant contains at least 1.0 weight percent of fat phosphite, and (II) when the industrial gear oil lubricant is supplied to When operating the industrial gearbox, operate the industrial gearbox.

The method may also include adding one of the industrial gear lubricants described herein to the industrial gear box and then operating the industrial gear box, which will produce a lower operating temperature in the industrial gear box compared to the industrial gear The operating temperature that the tank will experience when operating with a similar industrial gear lubricant that does not contain the specified fat phosphite.

In these methods, in some specific examples, at least a portion (if not all) of the fatty phosphite is added to the industrial gear oil lubricant before the lubricant system is supplied to the industrial gear box. In other specific examples, after the lubricant system is supplied to the industrial gearbox, at least a portion (if not all) of the fatty phosphite is added to the industrial gear oil lubricant.

In certain embodiments, the composition of the present invention is essentially free or even completely free: a copolymer containing units derived from two or more methacrylates. More specifically, in certain embodiments, the composition of the present invention is substantially free or even completely free: copolymers containing units derived from: (a) 9 to 25 carbons in the ester group Atomic methacrylate; and (b) Methacrylate containing 7 to 12 carbon atoms in the ester group, the ester group having a 2- (C _1-4 alkyl) -substituent; and selection (C) at least one monomer selected from the group consisting of: methacrylates containing 2 to 8 carbon atoms in the ester group atoms and their systems and methacrylates (a) and (b) Different, vinyl aromatic compounds, and nitrogen-containing vinyl monomers, which are limited to not more than 60% by weight of the ester in the ester group containing not more than 11 carbon atoms.

In some specific examples, the composition of the present invention is substantially free or even completely free: derived from nitrogen-containing carboxyl-containing interpolymers having a reduced specific viscosity (RSV) of about 0.05 to about 2 Ester, the interpolymer system is derived from at least two monomers. More specifically, in some specific examples, the composition of the present invention is substantially free or even completely free: nitrogen-containing derived from carboxyl-containing interpolymers having a reduced specific viscosity (RSV) of about 0.05 to about 2 Ester, the interpolymer is derived from at least two monomers, (i) one of the monomers is at least one of aliphatic olefins and vinyl aromatic monomers containing 2 to about 30 carbon atoms; and (ii) The other of these monomers is at least one α, β-unsaturated acetylating agent. The ester is characterized by the presence of each of the following groups in its polymer structure, which is derived from the interpolymer Carboxyl group: (A) about 20 to about 70 mole% of ester groups containing about 13 to about 19 carbon atoms, based on the mole of carboxyl group in the interpolymer; (B) selectivity of about 80 Up to about 30 mol% ester groups containing about 8 to about 12 carbon atoms, based on the mol of carboxyl groups in the interpolymer; (C) up to about 20 mol% containing 2 to 7 carbons The ester group of the atom, based on the mole of the carboxyl group in the interpolymer; which is derived from About 93 to about 97% of the carboxyl groups of the carboxyl-containing interpolymer are ester groups, and the difference of the carboxyl groups includes the remaining carboxylic acid or anhydride groups, which then (D) has an average of 1 to about 1.1 first order with at least one Or an amine compound of a secondary amine group to convert about 5 up to less than 50% of the carboxylic acid or anhydride group to a carbonyl-amine group, where the unreacted carboxylic acid or anhydride group remains as ( E) The remaining carboxylic acid or anhydride groups.

Examples

The present invention will be further clarified by the following examples which provide particularly excellent concrete examples. Although these examples are provided to illustrate the invention, they are not intended to limit it.

Example Group A

A group of examples of industrial gear lubricants prepared with Group II base oil. Each example is wrapped with the same base oil and the same industrial gear lubricant additive. Then, certain embodiments include supplemental additives to evaluate the effect that the supplement has on the operating temperature seen when the industrial gearbox is operated with the prepared industrial gear lubricant. These examples are always listed in the following table. Different amounts of different supplementary additives used in the examples reflect different levels of phosphorus for each material. The amount is adjusted so that the same amount of phosphorus is delivered when changing from one supplemental additive to another.

1- All the examples in this group use Group II ISO 150 base oil, which is a mixture of 600N RLOP base oil and polyisobutylene.

2- All the examples in this group are wrapped with the same industrial gear oil additives, which include sulfurized olefins, thiophosphates, thiadiazoles, tolyltriazoles, polyethers, alkenylamines, ester copolymers, carboxylic acids Ester and succinimide dispersant.

3-C18 phosphite is a phosphite having a C18 alkyl group substituted with a dialkyl group.

4-C16-18 phosphite is a phosphite having a C16-18 alkyl group substituted with a dialkyl group.

5-C16-18 phosphonate is a phosphonate having a C16-18 alkyl group substituted with a dialkyl group.

The 6-phosphate amine salt is an amine salt of C18 alkyl phosphate.

7- Each example was tested by an internally developed program, in which the "C" gear was assembled in the test fixture, lubricated with the example industrial gear lubricant, operated for a test period, and then loaded at 300 Newton meters Test at 1750 rpm for two hours. The temperature of the gearbox is monitored and the recorded value is a stable temperature during the test period. Compared to the baseline, a lower temperature indicates a reduced gearbox operating temperature. These results have been standardized for Zhou Wen.

The results show that the industrial gear lubricant of the present invention provides reduced operating temperature in industrial gear boxes. The data show that this benefit is obtained and reduced by the use of multiple fatty phosphites depending on the underlying medium used.

Example Group B

Additional sets of industrial gear lubricant examples were prepared with various other base oils. These examples are always listed in the following table.

1-Examples B-1, B-2, B-3, B-4, and B-5 used synthetic ISO 150 base oil, which is a mixture of PAOs.

2- Examples B-6 and B-7 used synthetic ISO 150 base oil, which is a mixture of PAOs and alkyl ester copolymers.

3- Examples B-8 and B-9 use a synthetic ISO 320 base oil, which is a mixture of PAOs and alkyl ester copolymers.

4- All the examples in this group, except for B-8 and B-9, are wrapped with the same industrial gear oil additives as the users in Example Group A. Examples B-8 and B-9 used different industrial gear oil additive packages, which included the same components as the package used in Example Group A, but in different amounts.

5-C18 phosphite is a phosphite having a C18 alkyl group substituted with a dialkyl group.

6-C16-18 phosphite is a phosphite with a C16-18 alkyl group substituted by a dialkyl group.

7- Each example was tested by an internally developed program, in which the "C" gear was assembled in the test fixture, lubricated with the example industrial gear lubricant, operated for a test period, and then loaded at 300 Newton meters Test at 1750 rpm for two hours. The temperature of the gearbox is monitored and the recorded value is the stable temperature during the test period. Compared to the baseline, a lower temperature indicates a reduced gearbox operating temperature.

The results show that the industrial gear lubricant of the present invention provides reduced operating temperature in industrial gear boxes. The data shows that this benefit is obtained through multiple base oils and different industrial gear additive packages.

Each document indicated above is incorporated by reference. except It is indicated in the examples that other or other aspects indicate that all numerical amounts of the amounts, reaction conditions, molecular weights, number of carbon atoms, etc. specified in this description are understood as modified by the wording "about". Unless otherwise indicated, all percentages and formulation values are based on weight. Unless otherwise indicated, all molecular weights are coefficient-average molecular weights. Unless otherwise indicated, each chemical or composition indicated herein should be interpreted as a commercial grade material, which may include isomers, by-products, derivatives, and other such materials that are normally understood to exist in a commercial grade. However, unless otherwise indicated, the amount of each chemical component is shown to exclude any solvent or diluent that may be conventionally present in commercial materials. It is to be understood that the upper and lower volume, range and ratio limits set forth herein can be combined independently. Similarly, the range and amount of each element of the present invention can be used with the range or amount of any other element. As used in this article, the word "consisting essentially of" permits the inclusion of substances that do not materially affect the basic and novel characteristics of the composition under consideration. All specific examples of the invention described herein consider both open and embedded perspectives (ie, use "including" text) and closed and exclusive perspectives (ie, use "consisting of" text) and Can be read from here.

As used herein, the term "hydrocarbyl substituent" or "hydrocarbyl group" is used in its ordinary sense, which is well known to those skilled in the art. In particular, it refers to a group that has carbon atoms directly attached to the remainder of the molecule and has significant hydrocarbon properties. Examples of the hydrocarbon group include: (i) hydrocarbon substituents, that is, aliphatic (eg, alkyl or alkenyl), alicyclic (eg, cycloalkyl, cycloalkenyl) substituents, and aromatic Aromatic substituents and cyclic substitutions of aliphatic, aliphatic and cycloaliphatic substitutions Group, wherein the ring system is completed by another part of the molecule (for example, two substituents together form a ring); (ii) substituted hydrocarbon substituents, that is, substituents containing a non-hydrocarbon group, wherein the non-hydrocarbon group In the context of the present invention, the group does not change the significant hydrocarbon nature of the substituent (for example, halo (especially chlorine and fluorine), hydroxyl, alkoxy, mercapto, alkylmercapto, nitro, nitroso and nitroso碸 基); (iii) Hetero substituents, that is to say, in the context of the present invention, in other aspects, the ring or chain composed of carbon atoms includes non-carbon substituents, and has significant hydrocarbon characteristics, and includes Substituents such as pyridyl, furyl, thienyl and imidazolyl. The hetero atoms include sulfur, oxygen and nitrogen. Generally speaking, there will be no more than two or no more than one non-hydrocarbon substituent for every ten carbon atoms in the hydrocarbon group; furthermore, there may be no non-hydrocarbon substituent in the hydrocarbon group.

It is known that some of the above materials can interact in the final formulation, so that the components of the final formulation can be different from those of the initial addition. For example, metal ions (eg, of detergents) can drift to other acidic or anionic positions of other molecules. The products thus formed include products formed after using the composition of the present invention for its intended use, which cannot be easily described. However, all such modifications and reaction products are included within the scope of the present invention; the present invention includes compositions prepared by mixing the above components.

Claims (5)

A method for reducing the operating temperature of an industrial gearbox. The steps of the method include: (I) adding an industrial gear lubricant additive package and fat phosphite to an industrial gear oil lubricant so that the lubricant contains at least 1.0 weight percent fat Phosphite; and (II) when the industrial gear oil lubricant is supplied to the industrial gear box, the industrial gear box is operated; wherein the fatty phosphite contains at least one phosphite substituted with a dihydrocarbyl group, the hydrocarbyl group having 16 to 18 carbon atoms; and wherein the industrial gear lubricant additive is packaged with the fatty phosphite in such an amount that its weight ratio is 4: 1 to 1: 5. A method as claimed in item 1 of the patent scope, wherein at least a part of the fatty phosphite is added to the industrial gear oil lubricant before the lubricant is supplied to the industrial gearbox; or wherein the lubricant is supplied in the lubricant system After reaching the industrial gearbox, at least a portion of the fatty phosphite is added to the industrial gear oil lubricant. The method as claimed in item 1 or 2 of the patent application, wherein the industrial gear oil lubricant contains component (a) oil of lubricating viscosity, and the oil of lubricating viscosity includes group I base oil, group II base oil, group III base oil, synthetic base oil, or any combination thereof. For example, the method of claim 1 or 2, wherein the industrial gear lubricant additive package contains one or more anti-wear additives and / or extreme pressure agents, one or more rust and / or corrosion inhibitors, one or more Foam inhibitor, one or more demulsifiers, or any combination thereof. For example, the method of claim 1 or 2, wherein the industrial gear lubricant additive package contains: one or more sulfurized olefins; one or more phosphorus amine salts; one or more phosphorothioates, one or more thiols Diazoles, tolyltriazoles, polyethers and / or alkenylamines; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants; or any combination thereof .