JP6378691B2 - Industrial gear oil that reduces the operating temperature of the gearbox - Google Patents

Description

The present invention relates to an improved gear oil composition that substantially reduces the operating temperature of the gearbox in which the gear oil composition is used. The reduction in operating temperature provided by the described composition results in improved equipment performance. The present invention also relates to methods of making and using the described gear oil compositions.

BACKGROUND OF THE INVENTION Industrial gearboxes experience critical operating conditions that can cause damage, for example, wear of parts inside the gearbox. This damage reduces the life of this industrial gearbox and is expensive, and long-term maintenance, repair costs, unexpected downtime for equipment including this industrial gearbox, and similar issues Can bring

  An improved industrial gearbox that provides better performance in industrial gearboxes and protection of industrial gearboxes, and thus can extend the useful life of the industrial gearboxes and equipment containing them There is a current need for lubricants.

  One means of protecting industrial gearboxes and extending the life of the liquid that lubricates them is to reduce the temperature at which it operates. It is generally known that long-term exposure to high temperatures at which industrial gearboxes normally operate increases wear of gearbox components and eventually leads to component failure. The adverse effects of this high operating temperature are the result of multiple influences, this high temperature accelerates the degradation of protective additives and increases the oxidation of the base liquid present in this industrial gearbox lubricant, This includes, but is not limited to, the fact that over time, this gearbox component may become less protected. Lowering the operating temperature of an industrial gearbox results in improved performance over time.

  One means of reducing the operating temperature of industrial gearboxes is through the use of an external cooler or the addition of radiating fins. However, such approaches are limited and can involve changes to existing equipment that are expensive and time consuming. There is a need for a technique that reduces the operating temperature of industrial gearboxes in existing equipment without requiring such changes.

  An alternative to lowering the gearbox operating temperature would be to operate the equipment at a lower level (lower load, lower power, lower speed, etc.). However, this approach generally results in reduced production and / or efficiency, and this is not an attractive option for equipment managers trying to maintain productivity. Instead, there is a need for an industrial gearbox lubricant that can reduce the operating temperature of an industrial gearbox without sacrificing operational levels (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 without making other changes to the operating conditions of the equipment.

SUMMARY OF THE INVENTION The present invention is an industrial gear composition comprising: (a) an oil of lubricating viscosity; (b) an industrial gear lubricant additive package; (c) 1.0% of the total composition. And an aliphatic phosphite present in a weight percent or more. The present invention is not directed towards automotive gear compositions and / or lubricants, but rather industrial gear oil compositions and / or addresses the unique challenges found in industrial gearbox applications. Focus on lubricants.

  The present invention includes component (b), an industrial gear lubricant additive package, comprising one or more antiwear additives and / or extreme pressure agents, one or more rust and / or corrosion inhibitors, Provided is a composition as described which may comprise the above antifoaming agents, one or more demulsifiers or any combination thereof. Component (b), the industrial gear lubricant additive package, may further comprise one or more friction modifiers.

  The present invention further includes: one or more sulfurized olefins or polysulfides; one or more phosphorus amine salts; one or more thiophosphate esters, one or more thiadiazoles, tolyltriazoles, polyethers and / or alkenylamines; Provided is component (b), an industrial gear lubricant additive package, further comprising an ester copolymer; one or more carboxylic acid esters; one or more succinimide dispersants, surfactants or any combination thereof. .

  The present invention provides concentrated compositions and lubricant compositions. The described industrial gear additive concentrate can contain up to 49% by weight of component (a). The described industrial gear lubricant may comprise at least 80% by weight of component (a). Component (b) may be present at 1-5% by weight of the total industrial gear lubricant; and component (c) is present at 1.0-5.0% by weight of the total industrial gear lubricant. Can do.

  The present invention further provides a method of reducing the operating temperature of an industrial gearbox, the method comprising: (I) an industrial gear oil lubricant with aliphatic phosphite, the lubricant being at least 1.0 weight. And (II) operating the industrial gearbox while supplying the industrial gear oil lubricant to the industrial gearbox; and including.

  The present invention further provides a method of reducing the operating temperature of an industrial gearbox, the method comprising: (I) supplying the industrial gearbox with a lubricant composition as described herein. And (II) operating the industrial gearbox. In any of these embodiments, the aliphatic phosphite may be added to the industrial gear oil lubricant before the lubricant is fed to the industrial gearbox, or where the aliphatic phosphite is here. At least a portion of the fight is added to the industrial gear oil lubricant after the lubricant is supplied to the industrial gearbox.

The present invention provides the use of the described aliphatic phosphites in industrial gear lubricant compositions to reduce the operating temperature of industrial gearboxes in which the lubricant composition is used. The present invention also provides the use of the described industrial gear lubricant composition to reduce the operating temperature of an industrial gearbox in which the lubricant composition is used.
For example, the present invention provides the following items.
(Item 1)
Industrial gear composition:
(A) an oil of lubricating viscosity;
(B) an industrial gear lubricant additive package;
(C) an aliphatic phosphite present in 1.0% or more by weight of the total composition;
A composition comprising
(Item 2)
The composition of item 1, wherein component (b) and component (c) are present in an amount such that the weight ratio of component (b) to component (c) is from 4: 1 to 1: 5.
(Item 3)
Any of the preceding items wherein component (a), the oil of lubricating viscosity comprises a Group I base oil, a Group II base oil, a Group III base oil, a synthetic base oil, any combination thereof A composition according to claim 1.
(Item 4)
Component (b), the industrial gear lubricant additive package, is one or more antiwear additives and / or extreme pressure agents, one or more rust inhibitors and / or corrosion inhibitors, one or more. A composition according to any of the preceding items comprising an antifoaming agent, one or more demulsifiers or any combination thereof.
(Item 5)
Item 5. The composition of item 4, wherein component (b), the industrial gear lubricant additive package, further comprises one or more friction modifiers.
(Item 6)
Component (b), the industrial gear lubricant additive package, includes: one or more sulfurized olefins; one or more polysulfides; one or more phosphorus amine salts; one or more thiophosphate esters, one or more 2. The thiadiazole, tolyltriazole, polyether and / or alkenylamine; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants or any combination thereof. Composition.
(Item 7)
A composition according to any preceding item, wherein component (c), said aliphatic phosphite, comprises an alkenyl phosphite or an ester thereof.
(Item 8)
A composition according to any of the preceding items, wherein the composition is an industrial gear additive concentrate comprising up to 40% by weight of component (a).
(Item 9)
The composition according to any one of items 1 to 7, wherein the composition is an industrial gear lubricant containing at least 80% by weight of component (a).
(Item 10)
Component (b) is present in 1-5% by weight of the total industrial gear lubricant; and
10. A composition according to item 9, wherein component (c) is present in 1.0-10.0% by weight of the total industrial gear lubricant.
(Item 11)
A method of reducing the operating temperature of an industrial gearbox, the method comprising: (I) an industrial gear oil lubricant with an aliphatic phosphite, and the lubricant is at least 1.0 wt% aliphatic. Adding phosphite to include, and (II) operating the industrial gearbox while supplying the industrial gear oil lubricant to the industrial gearbox. Method.
(Item 12)
At least a portion of the aliphatic phosphite is added to the industrial gear oil lubricant before the lubricant is supplied to the industrial gearbox, or at least one of the aliphatic phosphite. 12. The method of item 11, wherein a portion is added to the industrial gear oil lubricant after the lubricant is supplied to the industrial gear box.
(Item 13)
Any of the above items 11 to 12, wherein component (b) and component (c) are present in an amount such that the weight ratio of component (b) to component (c) is from 4: 1 to 1: 5 The method described in 1.
(Item 14)
From component 11, wherein component (a), the oil of lubricating viscosity comprises a Group I base oil, a Group II base oil, a Group III base oil, a synthetic base oil, any combination thereof The method according to any one of 13 to 13.
(Item 15)
Component (b), the industrial gear lubricant additive package, is one or more antiwear additives and / or extreme pressure agents, one or more rust inhibitors and / or corrosion inhibitors, one or more. 15. The method according to any one of items 11 to 14, comprising an antifoaming agent, one or more demulsifiers, or any combination thereof.
(Item 16)
Component (b), the industrial gear lubricant additive package, is: one or more sulfurized olefins; one or more phosphorus amine salts; one or more thiophosphate esters, one or more thiadiazoles, tolyltriazole, poly 15. Any of the preceding items 11 to 14, comprising ether and / or alkenylamine; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants; or any combination thereof. the method of.
(Item 17)
17. The method according to any of items 11 to 16, wherein component (c), the aliphatic phosphite, comprises an alkenyl phosphite or an ester thereof.
(Item 18)
18. A method according to any of items 11 to 17, wherein the composition is an industrial gear additive concentrate comprising up to 40% by weight of component (a).
(Item 19)
19. A method according to any of items 11 to 18, wherein the composition is an industrial gear lubricant comprising at least 80% by weight of component (a).
(Item 20)
Component (b) is present in 1-5% by weight of the total industrial gear lubricant; and
20. A method according to item 19, wherein component (c) is present in 1.0 to 10.0% by weight of the total industrial gear lubricant.

DETAILED DESCRIPTION OF THE INVENTION Various features and embodiments of the present invention are described below by way of non-limiting illustrative methods.

  The industrial gear composition of the present invention is present in: (a) an oil of lubricating viscosity; (b) an industrial gear lubricant additive package; (c) present in 1.0% or more by weight of the total composition. Aliphatic phosphites. In some embodiments, the industrial gear lubricant additive package may include a demulsifier, a dispersant and a metal deactivator. At least 1.0% by weight aliphatic phosphite, which in at least some embodiments, at least this amount of aliphatic phosphite is the stated benefit in this industrial gear oil composition; In other words, it is considered necessary to obtain a reduction in the operating temperature of the gearbox. The extent to which the benefits of the present invention can be expected will vary and / or will depend somewhat on the base liquid used.

Oil of lubricating viscosity The oil of lubricating viscosity may be present in a major amount for the lubricant composition or in a concentrate forming amount for the concentrated and / or additive composition.

  Suitable oils include natural and synthetic lubricating oils and combinations thereof. In fully formulated lubricants, oils of lubricating viscosity are generally present in major amounts (ie, greater than 50% by weight). Typically, the oil of lubricating viscosity is present in an amount of 75-98% by weight of the total composition, and often more than 80% by weight.

  Oils of lubricating viscosity can include natural and synthetic oils, oils derived from hydrocracking, hydrogenation and hydrofinishing, unrefined, refined and rerefined oils or mixtures thereof. Non-refined oils are obtained directly from natural or synthetic sources and are generally not (or rarely) further refined. Refined oils are the same as unrefined oils except that they have been further processed in one or more refining 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, percolation and similar processes. Rerefined oils are also known as reclaimed or reprocessed oils and are obtained by a process similar to that used to obtain refined oils. Rerefined oils are often processed by techniques related to the removal of spent additives and oil breakdown products.

  Natural oils useful as oils of lubricating viscosity include animal and vegetable oils (eg, castor oil, lard oil), mineral lubricants such as paraffinic, naphthenic or mixed paraffinic naphthenic, solvent or acid treated mineral lubricants And oils derived from coal or shale or mixtures thereof.

  Synthetic oils of lubricating viscosity include hydrocarbon oils such as polymerized and interpolymerized olefins (eg, polybutylene, polypropylene, propylene isobutylene copolymers); poly (1-hexene), poly (1-octene), poly (1-decane) ) And mixtures thereof; alkyl-benzenes (eg, dodecylbenzene, tetradecylbenzene, dinonylbenzene, di- (2-ethylhexyl) -benzene); polyphenyls (eg, biphenyl, terphenyl, alkylated polyphenyl); Alkylated biphenyl ethers and alkylated biphenyl sulfides and their derivatives, analogs and homologs or mixtures thereof. In some embodiments, the oil of lubricating viscosity used in the present invention is a synthetic oil comprising polymerized polyisobutylene, and in some embodiments, the oil of lubricating viscosity used in the present invention is: A synthetic oil containing polymerized polyisobutylene and polyalphaolefin.

  Alternative synthetic oils of lubricating viscosity include polyol esters other than polyoxyalkylene polyols capped with hydrocarbyl as disclosed herein, dicarboxylic acid esters, liquid esters of phosphorus-containing acids (eg, tricresyl Phosphate, trioctyl phosphate and diethyl ether of decanophosphonic acid) or polymeric tetrahydrofuran. Conventional synthetic oils of lubricating viscosity also include those produced by the Fischer-Tropsch reaction, and can typically be hydroisomerized Fischer-Tropsch hydrocarbons or waxes. In one embodiment, the oil of lubricating viscosity may be prepared by a Fischer-Tropsch gas liquefaction synthesis procedure and may be other gas liquefied oils.

  Oils of lubricating viscosity may be further defined as specified in the American Petroleum Institute (API) Base Oil Interchangeability Guidelines (Base Oil Interchangeability Guidelines). The five base oil groups are as follows: Group I (sulfur content> 0.03% by weight, and / or <90% by weight saturation, viscosity index 80-120); Group II (sulfur content ≦ 0. 03 wt% and ≧ 90 wt% saturation, viscosity index 80-120); Group III (sulfur content ≦ 0.03% wt and ≧ 90 wt% saturation, viscosity index ≧ 120); Group IV (all poly Alpha olefins or PAOs such as PAO-2, PAO-4, PAO-5, PAO-6, PAO-7 or PAO-8); and Group V (this includes "all others"). The oil of lubricating viscosity comprises an API Group I, Group II, Group III, Group IV, Group V oil or mixtures thereof. In one embodiment, the oil of lubricating viscosity is an API Group I, Group II, Group III, Group IV oil or mixtures thereof. Alternatively, the oil of lubricating viscosity is often an API Group II, Group III or Group IV oil or a mixture thereof.

  In some embodiments, the lubricating oil composition of the present invention comprises a Group II or Group III base oil or a combination thereof. This oil may also be derived from the hydroisomerization of waxes, for example, slack waxes or Fischer-Tropsch synthesized waxes. Such “gas liquefied” oils are typically characterized as Group III.

  The compositions of the present invention may contain some amount of Group I base oils, and even Group IV and Group V base oils. However, in some embodiments, the lubricating oil component of the present invention comprises no more than 20 wt%, no more than 10 wt%, no more than 5 wt%, or even no more than 1 wt% Group I base oil. These limits may also apply to Group IV or Group V base oils. In another embodiment, the lubricating oil present in the composition of the present invention comprises at least 60 wt%, at least 70 wt%, at least 80 wt%, at least 90 wt% or even at least 98 wt% Group II and / or Contains Group III base oils. In some embodiments, the lubricating oil present in the composition of the present invention is essentially only Group II and / or Group III base oils, where small amounts of other types of base oils are present. However, it is not an amount that significantly affects the overall properties or performance of the composition.

  In some embodiments, the compositions of the present invention comprise some amount of Group I and / or Group II base oil. In another embodiment, the composition of the present invention is such that the oil of lubricating viscosity is primarily a Group I and / or Group II base oil, or more essentially a Group I and / or Group II base oil. Or more exclusively a lubricating composition that is a Group I and / or Group II base oil.

  In some embodiments, the present invention provides a Group II composition, i.e., the oil of lubricating viscosity comprises a Group II oil and is primarily, if not exclusively, a Group II oil. While still providing the performance of synthetic oil compositions. This is one of the advantages of the present invention.

  The various lubricating viscosity oils described may be used alone or in combination. The oil of lubricating viscosity is in the range of about 80% to about 98% by weight, or from 80% oil, from 85% oil, from 90% oil, from 95% oil, From 97 wt% oil or even from 97.5 wt% oil or from 98 wt% oil, or up to 90 wt% oil, up to 95 wt% oil, up to 97 wt% oil, up to 97.5 wt% Up to% oil or even up to 98% oil by weight can be used in the industrial gear lubricants described. Oils of lubricating viscosity are in the range of about 1% to about 49% by weight, or from 1% oil to 5% oil to 10% oil to 10% oil, 20% Dilute in the industrial gear additive concentrates described up to wt% oil, up to 30 wt% oil, up to 40 wt% oil or even up to 45 wt% oil or up to 49 wt% oil Can be used as an agent.

Industrial Gear Lubricant Additive Package The composition of the present invention comprises an industrial gear additive package. In other words, the composition of the present invention is designed to be an industrial gear lubricant or additive package for making it. The present invention is not related to automotive gear lubricants or other lubricating compositions.

  In some embodiments, an industrial gear lubricant additive package includes a demulsifier, a dispersant, and a metal deactivator. Any combination of conventional additive packages designed for industrial gear applications can be used. The invention inherently has such additive packages essentially free of the aliphatic phosphites of the present invention, or at least including the specified amounts of aliphatic phosphites of the type specified by the present invention. Assume that there is no.

  Additives that may be present in industrial gear additive packages include anti-foaming agents, demulsifiers, pour point depressants, antioxidants, dispersants, metal deactivators (eg, copper deactivators), Antiwear agents, extreme pressure agents, viscosity modifiers, or some mixtures thereof. These additives may be from 50 ppm by weight, from 75 ppm by weight, from 100 ppm by weight, or even from 150 ppm by weight, up to 5 wt%, up to 4 wt%, up to 3 wt%, up to 2 wt% or even 1. May be present up to 5 wt%, or in the range of 75 wt% to 0.5 wt%, 100 wtppm to 0.4 wt%, or 150 wtppm to 0.3 wt%, respectively, where these wt% Values are for the entire lubricating oil composition. However, some additives (including viscosity modifying polymers and may alternatively be considered as part of the base liquid) can be up to 30% by weight, up to 40% by weight or even 50% when considered separately from this base liquid. Note that higher amounts, including up to%, may be present. These additives may be used alone or as a mixture thereof.

  Antifoaming agents (also known as antifoaming agents) are known in the art and include, but are not limited to, organic silicones and non-silicone antifoaming agents. Examples of organosilicones include dimethyl silicone and polysiloxane. Examples of non-silicon antifoaming agents include, but are not limited to, polyethers, polyacrylates and mixtures thereof, and copolymers of ethyl acrylate, 2-ethylhexyl acrylate and optionally vinyl acetate. In some embodiments, the antifoaming agent is a polyacrylate. Antifoaming agents may be present in the composition at 0.001 to 0.012 pbw or ˜0.004 pbw or even 0.001 to 0.003 pbw.

  Demulsifiers are known in the art and are derivatives of propylene oxide, ethylene oxide, polyoxyalkylene alcohols, alkylamines, aminoalcohols, diamines or polyamines that are reacted sequentially with ethylene oxide or substituted ethylene oxide, or Including, but not limited to, mixtures thereof. Examples of demulsifiers include polyethylene glycol, polyethylene oxide, polypropylene oxide, (ethylene oxide-propylene oxide) polymers and mixtures thereof. In some embodiments, the demulsifier is a polyether. Demulsifiers may be present in the composition at 0.002 to 0.2 pbw.

  Pour point depressants are known in the art and are polymethacrylates, maleic anhydride-ester copolymers of styrene; polyacrylates; polyacrylamides; condensation products of haloparaffin waxes and aromatics; vinyl carboxylates Polymers; and vinyl esters of fatty acids, copolymers of ethylene-vinyl acetate, alkylphenol formaldehyde polymerized resins, alkyl vinyl ethers, terpolymers of dialkyl fumarate and mixtures thereof, but are not limited to these.

の式によって表され、ここにおいてＣｙはベンゼンまたはナフタレン環である。Ｒ^１は、約４個から約３０個まで、好ましくは約６個から約２５個まで、より好ましくは約８個から約２０個までの炭素原子を有するヒドロカルビル基である。ｚは独立して１、２、３または４であり、そして最も好ましくは、ｚは１または２である。Ｒ^２、Ｒ^３およびＲ^４は上述のものと同じである。本発明のヒドロカルビルアレーンスルホン酸のヒドロカルビルアミン塩の例として、ジノニルナフタレンスルホン酸のエチレンジアミン塩が挙げられるがこれに限定されない。適切な脂肪族カルボン酸またはそれらのエステルの例としてモノオレイン酸グリセロールおよびオレイン酸が挙げられる。適切な窒素含有カルボン酸のエステルの例としてオレイルサルコシンが挙げられる。この錆防止剤は、この潤滑油組成物の０．０２〜０．２重量％、０．０３〜０．１５重量％、０．０４〜０．１２重量％または０．０５〜０．１重量％の範囲で存在し得る。本発明の錆防止剤は単独で使用されてもよいし、またはそれらの混合物で使用されてもよい。 In addition to some of the above-mentioned additives, the composition of the present invention may also contain a rust inhibitor. Suitable rust inhibitors include hydrocarbyl amine salts of dialkyldithiophosphoric acids, hydrocarbyl arene sulfonic acids, hydrocarbyl amine salts of aliphatic carboxylic acids, or esters thereof, esters of nitrogen-containing carboxylic acids, ammonium sulfonates, imidazolines, mono-thiophosphorus Acid salts or esters, or any combination thereof; or mixtures thereof. Examples of hydrocarbylamine salts of dialkyldithiophosphoric acids according to the invention include those mentioned above as well as reaction products of diheptyl or dioctyl or dinonyldithiophosphoric acid with ethylenediamine, morpholine or Primene® 81R (single or plural). Or a mixture thereof, but is not limited thereto. Suitable hydrocarbyl arene sulfonic acid hydrocarbyl amine salts for use in the rust inhibitor package of the present invention are:

Where Cy is a benzene or naphthalene ring. R ¹ is a hydrocarbyl group having from about 4 to about 30, preferably from about 6 to about 25, more preferably from 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 hydrocarbyl amine salts of hydrocarbyl arene sulfonic acids of the present invention include, but are not limited to, ethylenediamine salts of dinonyl naphthalene sulfonic acids. Examples of suitable aliphatic carboxylic acids or their esters include glycerol monooleate and oleic acid. An example of a suitable ester of a nitrogen-containing carboxylic acid is oleyl sarcosine. The rust inhibitor is 0.02 to 0.2%, 0.03 to 0.15%, 0.04 to 0.12% or 0.05 to 0.1% by weight of the lubricating oil composition. % May be present. The rust inhibitor of the present invention may be used alone or in a mixture thereof.

  The composition of the present invention may also contain a metal deactivator. Metal deactivators are used to counteract the catalytic effects of metals that promote oxidation in lubricating oils. Suitable metal deactivators include, but are not limited to, triazole, tolyltriazole, thiadiazole or combinations thereof, and derivatives thereof. Examples include benzotriazoles other than those mentioned above, benzimidazole, 2-alkyldithiobenzimidazole, 2-alkyldithiobenzothiazole, 2- (N, N′-dialkyldithio-carbamoyl) benzothiazole, 2,5-bis ( Alkyl-dithio) -1,3,4-thiadiazole, 2,5-bis (N, N′-dialkyldithiocarbamoyl) -1,3,4-thiadiazole, derivatives of 2-alkyldithio-5-mercaptothiadiazole or the like Of the mixture. These additives may be used at 0.01 to 0.25% by weight in the total composition. In some embodiments, the metal deactivator is a hydrocarbyl substituted benzotriazole compound. Benzotriazole compounds having hydrocarbyl substitution include at least one of the following ring positions, 1- or 2- or 4- or 5- or 6- or 7-benzotriazole. The hydrocarbyl group contains from about 1 to about 30, preferably from about 1 to about 15, more preferably from about 1 to about 7 carbon atoms, and most preferably the metal deactivator. Is 5-methylbenzotriazole used alone or a combination thereof. The metal deactivator may be present in the range of 0.001 to 0.5 pbw, 0.01 to 0.04 pbw or 0.015 to 0.03 pbw of the lubricating oil composition. Metal deactivators can also be present in the composition at 0.002- or 0.004-0.02 pbw. This metal deactivator may be used alone or in a mixture thereof.

  Antioxidants can also be present, for example (i) alkylated diphenylamines and (ii) substituted hydrocarbyl monosulfides. In some embodiments, the alkylated diphenylamines of the present invention are bis-nonylated diphenylamine and bis-octylated diphenylamine. In some embodiments, the substituted hydrocarbyl monosulfide includes n-dodecyl-2-hydroxyethyl sulfide, 1- (tert-dodecylthio) -2-propanol, or combinations thereof. In some embodiments, the substituted hydrocarbyl monosulfide is 1- (tert-dodecylthio) -2-propanol. The antioxidant package can also include sterically hindered phenols. Examples of suitable hydrocarbyl groups for this 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 4,4′-methylene-bis (6-tert-butyl o-cresol), 4,4′-methylene-bis (2-tert-amyl-o-cresol), 2, Examples include, but are not limited to, 2'-methylene-bis (4-methyl-6-tert-butylphenol), 4,4'-methylene-bis (2,6-di-tertbutylphenol) or mixtures thereof.

  In some embodiments, the industrial gear lubricant additive package of the present invention includes a nitrogen-containing dispersant, such as a hydrocarbyl substituted nitrogen-containing additive. Suitable hydrocarbyl substituted nitrogen-containing additives include ashless dispersants and polymeric dispersants. Ashless dispersants are so named because they do not contain metal at the time of supply and, therefore, usually do not contribute to sulfated ash when added to a lubricant. However, of course, once they are added to lubricants containing metal-containing species, they can interact with surrounding metals. Ashless dispersants are characterized by polar groups attached to relatively high molecular weight hydrocarbon chains. Examples of such materials 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. These sulfurized olefins or polysulfides can be derived from isobutylene, butylene, propylene, ethylene, or some combination thereof. In some embodiments, the sulfur-containing compound is a sulfurized olefin derived from any of the natural or synthetic oils described above, or even some combination thereof. For example, the sulfurized olefin can be derived from vegetable oil.

  In some embodiments, the industrial gear additive package includes one or more phosphorus amine salts, which may be the additive package (or, in another embodiment, the resulting industrial gear). In such an amount that the lubricant composition) comprises no more than 1.0%, or even no more than 0.75% or no more than 0.6% by weight of such materials. In another embodiment, the industrial gear additive package, or resulting industrial gear lubricant composition, is essentially free or even completely free of phosphorus amine salts.

  In some embodiments, component (b), an industrial gear lubricant additive package, includes one or more antiwear additives and / or extreme pressure agents, one or more rust inhibitors and / or corrosion. An inhibitor, one or more antifoaming agents, one or more demulsifiers or any combination thereof.

  In some embodiments, the industrial gear additive package, or resulting industrial gear lubricant composition, is essentially free or even completely free of phosphorus amine salts, dispersants, or both. Absent.

  In some embodiments, the industrial gear additive package, or resulting industrial gear lubricant composition, includes a demulsifier, a corrosion inhibitor, a friction modifier, or a combination of two or more thereof. In some embodiments, the corrosion inhibitor includes tolyltriazole. In yet another embodiment, the industrial gear additive package, or resulting industrial gear lubricant composition, comprises one or more sulfurized olefins or polysulfides; one or more phosphorusamine salts; A thiophosphate ester, one or more thiadiazoles, tolyltriazole, polyether and / or alkenylamine; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants or any combination thereof. Including.

  The industrial gear additive package may be 1-5% by weight of the total industrial gear lubricant, or in another embodiment from 1%, 1.5% or even 2% by weight, It can be present up to 2%, up to 3%, up to 4%, up to 5%, up to 7% or even up to 10%. The amount of industrial gear additive package that may be present in the industrial gear concentrate composition of the present invention is an amount corresponding to the above weight percent; where these values are considered without the oil present. (Ie, together with the actual amount of oil present, they can be treated as pbw values).

Aliphatic phosphite The composition of the present invention comprises an aliphatic phosphite present at 1.0% or more by weight of the total lubricant composition.

  Suitable phosphites include those having at least one hydrocarbyl group having 4 or more, or 8 or more, or 12 or more carbon atoms. Typical ranges for the number of carbon atoms on the hydrocarbyl group include 8-30 or 10-24 or 12-22 or 14-20 or 16-18. The phosphite can be a mono-hydrocarbyl substituted phosphite, a di-hydrocarbyl substituted phosphite or a tri-hydrocarbyl substituted phosphite. In one embodiment, the phosphite does not contain sulfur, i.e. the phosphite is not a thiophosphite.

の式によって表され得、ここにおいて、Ｒ^５、Ｒ^６およびＲ^７の少なくとも１つは、少なくとも４個の炭素原子を含むヒドロカルビル基であってもよく、そしてその他は水素またはヒドロカルビル基であってよい。１つの実施形態において、Ｒ^５、Ｒ^６およびＲ^７は全てヒドロカルビル基である。このヒドロカルビル基は、アルキル、シクロアルキル、アリール、非環状またはそれらの混合物であり得る。３つ全ての基Ｒ^５、Ｒ^６およびＲ^７を有する式において、この化合物はトリ−ヒドロカルビル置換ホスファイトであり得、すなわち、Ｒ^５、Ｒ^６およびＲ^７は全てヒドロカルビル基である。 Phosphites having at least one hydrocarbyl group having 4 or more carbon atoms are:

Wherein at least one of R ⁵ , R ⁶ and R ⁷ may be a hydrocarbyl group containing at least 4 carbon atoms, and the others are hydrogen or hydrocarbyl groups Good. In one embodiment, R ⁵ , R ⁶ and R ⁷ are all hydrocarbyl groups. The hydrocarbyl group can be alkyl, cycloalkyl, aryl, acyclic or mixtures thereof. In formulas with all three groups R ⁵ , R ⁶ and R ⁷ , the compound can be a tri-hydrocarbyl substituted phosphite, ie R ⁵ , R ⁶ and R ⁷ are all hydrocarbyl groups.

The alkyl group may be linear or branched, typically linear, and may be unsaturated or saturated, typically Can be saturated. Examples of alkyl groups for R ⁵ , R ⁶ and R ⁷ include octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, octadecenyl, nonadecyl, eicosyl or A mixture is mentioned.

  In some embodiments, the entire aliphatic phosphite component and / or composition of the present invention is essentially free or even completely free of phosphate esters and / or their amine salts.

  In some embodiments, the aliphatic phosphite comprises an alkenyl phosphite or an ester thereof, such as an ester of dimethyl hydrogen phosphite.

  Aliphatic phosphites are from 1.0 to 10.0% by weight of the total industrial gear lubricant, or in another embodiment from 1%, 1.5% or even 2% by weight. Up to 1.5% by weight, up to 1.9% by weight, up to 2% by weight, up to 3% by weight, up to 4% by weight, up to 5% by weight, up to 7% by weight or even up to 10% by weight. The amount of industrial gear additive package that may be present in the industrial gear concentrate composition of the present invention is an amount corresponding to the above weight percent; where these values are considered without the oil present ( That is, when combined with the actual amount of oil present, they can be treated as pbw values).

  In some embodiments, the ratio of the industrial gear additive package component (component (b)) to the aliphatic phosphite component (component (a)) is 1: 0. 5 to 1: 1.5. In still further embodiments, the ratio (b) :( c) of this component 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 noted above, the present invention includes both industrial gear lubricants and industrial gear additive concentrates that can be used to make industrial gear lubricants.

  In the industrial gear lubricant of the present invention: component (a), oil of lubricating viscosity, from 80% oil, from 85% oil, from 90% oil, from 95% oil. From 97% oil or from further 97.5% oil or from 98% oil to 90%, 95%, 97%, 97.5% or even 98% Component (b), an industrial gear lubricant additive package, may be present from 1% to 1.5% or even from 2% to 2% by weight, 3% by weight. Up to 4% by weight, up to 5% by weight, up to 7% by weight or even up to 10% by weight; and component (c), aliphatic phosphite, from 1% to 1.5% by weight Or even from 2% to 1.5% by weight, 1.9 Until the amount%, up to 2 wt%, up to 3 wt%, up to 4% by weight, up to 5 wt%, may be present in up to or even 10 wt% to 7 wt%.

  In the industrial gear additive concentrate of the present invention: component (a), oil of lubricating viscosity, from 1 wt% oil to 5 wt% oil to 10 wt% oil to 10 wt% , Up to 20%, up to 30%, up to 40% or even up to 45% or up to 49% by weight; component (b), industrial gear lubricant additive package, %, 25%, 25.5%, 27.5%, 30%, 35%, 45% or even 45% to 45%, Component (c), aliphatic phosphite, from 25.5 wt% to 27.5 wt%, from 30 wt% to 35 wt%, or even up to 49.5 wt% % By weight, 45% by weight or more 45 wt%, up to 45 wt%, may be present in up to or even 49.5 wt% to 47.5 wt%.

  In some embodiments, the ratio of the industrial gear additive package component (component (b)) to the aliphatic phosphite component (component (a)) is 1: 0. 5 to 1: 1.5. In still further embodiments, the ratio (b) :( c) of this component 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 may be applied to the industrial gear lubricant of the present invention and / or to the industrial gear additive concentrate of the present invention.

  The present invention includes a method of making the industrial gear lubricant and / or industrial gear additive concentrate described above. Such a method involves mixing together the components described. The particular order or means of addition is not considered to significantly affect the results.

  The present invention also includes a method for reducing the operating temperature of an industrial gearbox. The method includes: (I) adding an aliphatic phosphite to an industrial gear oil lubricant such that the lubricant contains at least 1.0% by weight aliphatic phosphite; Operating the industrial gearbox while supplying gear oil lubricant to the industrial gearbox.

  The method can also include the addition of one of the industrial gear lubricants described herein to an industrial gearbox, and subsequently operating the industrial gearbox, This means that when operated with a similar industrial gear lubricant that does not contain the specified aliphatic phosphite, the lower operating temperature compared to the operating temperature experienced by this industrial gearbox. In this industrial gearbox.

  In these methods, in some embodiments, at least some if not all of the aliphatic phosphite is added to the industrial gear oil lubricant before the lubricant is supplied to the industrial gearbox. Added. In another embodiment, at least some if not all of the aliphatic phosphite is added to the industrial gear oil lubricant after the lubricant is supplied to the industrial gearbox. .

In some embodiments, the compositions of the present invention are essentially free or even completely free of copolymers comprising units derived from two or more methacrylate esters. More specifically, in some embodiments, the composition of the present invention is essentially free or even completely free of: a copolymer comprising units derived from: a) a methacrylic acid ester containing 9 to 25 carbon atoms in its ester group and (b) a methacrylic acid ester containing 7 to 12 carbon atoms in its ester group, A methacrylic acid ester wherein the ester group has a 2- (C _1-4 alkyl) -substituent, and optionally (c) 2 to 8 carbon atoms in the atom of the ester group; and At least one selected from the group consisting of methacrylic acid esters different from methacrylic acid esters (a) and (b), vinyl aromatic compounds and nitrogen-containing vinyl monomers Provided that no more than 60% by weight of the monomer contains no more than 11 carbon atoms in the ester group.

  In some embodiments, the composition of the present invention is a nitrogen-containing ester derived from a carboxy-containing interpolymer having a reduced specific viscosity (RSV) of about 0.05 to about 2, wherein the interpolymer is Essentially free or even completely free of nitrogen-containing esters derived from at least two monomers. More specifically, in some embodiments, the compositions of the present invention are essentially free or even completely free of the following: reduced specific viscosity (from about 0.05 to about 2) A nitrogen-containing ester derived from a carboxy-containing interpolymer having RSV), wherein the interpolymer is derived from at least two types of monomers, and (i) one of the monomers is from 2 to about 30 carbons At least one of an aliphatic olefin and a vinyl aromatic monomer containing an atom, and (ii) the other of the monomer is at least one α, β-unsaturated acylating agent, and the ester is a polymer thereof A nitrogen-containing ester, characterized by the presence of each of the following groups derived from the carboxy group of the interpolymer in the sex structure: Tell: (A) from about 20 to about 70 mole percent of ester groups containing from about 13 to about 19 carbon atoms, based on moles of carboxy groups in the interpolymer; (B) in the interpolymer From about 80 to about 30 mole percent, based on the moles of carboxy groups, of ester groups containing from about 8 to about 12 carbon atoms, optionally; (C) of the carboxy groups in the interpolymer Ester groups containing from 2 to 7 carbon atoms, up to about 20 mol%, based on moles; wherein from about 93 to about 97% of the carboxy groups derived from the carboxy-containing interpolymer are ester groups The remaining carboxy groups contain residual carboxylic acid or anhydride groups, which then (D) have on average from 1 to about 1.1 primary or secondary amino groups. A carboxylic acid or acid anhydride group that has been reacted with at least one amino compound to convert from about 5 to less than 50% of the carboxylic acid or acid anhydride group to a carbonyl-amino group Is maintained as (E) residual carboxylic acid or anhydride group.

  The invention is further illustrated by the following examples that illustrate particularly advantageous embodiments. While these examples are provided to illustrate the present invention, they are not intended to limit the invention.

１−このセットにおける全ての実施例はグループＩＩのＩＳＯ １５０基油を使用しており、これは６００Ｎ ＲＬＯＰ基油とポリイソブチレンとの混合物である。
２−このセットにおける全ての実施例は、硫化オレフィン、チオホスフェートエステル、チアジアゾール、トリルトリアゾール、ポリエーテル、アルケニルアミン、エステルコポリマー、カルボン酸エステルおよびスクシンイミド分散剤を含む同じ工業用のギアオイル添加剤パッケージを使用している。
３−Ｃ１８ホスファイトは、Ｃ１８アルキル基を有するジ−アルキル置換ホスファイトである。
４−Ｃ１６〜１８ホスファイトは、Ｃ１６〜１８アルキル基を有するジ−アルキル置換ホスファイトである。
５−Ｃ１６〜１８ホスホネートは、Ｃ１６〜１８アルキル基を有するジ−アルキル置換ホスホネートである。
６−ｐｈｏｓ酸アミン塩は、Ｃ１８アルキルリン酸のアミン塩である。
７−それぞれの実施例は、内部で開発された手順によって試験され、この手順において、「Ｃ」型のギアは試験装置の中に取り付けられ、これら実施例の工業用のギア潤滑剤で潤滑され、慣らし期間を通して動作させられ、そしてその後３００Ｎｍの負荷の下で１７５０ｒｐｍで２時間試験される。ギアボックスの温度がモニタリングされ、そして報告される値は、温度が試験期間の間中安定化されていたところである。ベースラインと比較してより低い温度は、ギアボックスの動作温度の低下を示す。これらの結果は周囲温度に対して正規化されている。 Example set A
An example set of industrial gear lubricants is prepared in a Group II base oil. Each example uses the same base oil and the same industrial gear lubricant additive package. In order to evaluate the effect of the adjuvant on the operating temperature seen when an industrial gearbox is operated with a prepared gear lubricant, some examples use auxiliary additives. Including. These examples are summarized in the following table. The different amounts of the different auxiliary additives used in these examples reflect the different phosphorus levels of the respective materials. The amount was adjusted to deliver the same amount of phosphorus when changing from one auxiliary additive to another.

1- All examples in this set use Group II ISO 150 base oil, which is a mixture of 600N RLOP base oil and polyisobutylene.
2- All examples in this set include the same industrial gear oil additive package containing sulfurized olefins, thiophosphate esters, thiadiazoles, tolyltriazoles, polyethers, alkenylamines, ester copolymers, carboxylic acid esters and succinimide dispersants. I use it.
3-C18 phosphite is a di-alkyl substituted phosphite having a C18 alkyl group.
4-C16-18 phosphite is a di-alkyl substituted phosphite having a C16-18 alkyl group.
5-C16-18 phosphonate is a di-alkyl substituted phosphonate having a C16-18 alkyl group.
6-phos acid amine salt is an amine salt of C18 alkyl phosphoric acid.
7-Each example is tested by an internally developed procedure, in which a "C" type gear is installed in the test equipment and lubricated with the industrial gear lubricant of these examples. , Run through the break-in period, and then tested for 2 hours at 1750 rpm under a load of 300 Nm. The gearbox temperature is monitored and the reported value is where the temperature has stabilized during the test period. A lower temperature compared to the baseline indicates a reduction in gearbox operating temperature. These results are normalized to ambient temperature.

  The results show that the industrial gear lubricant of the present invention provides a reduction in operating temperature in industrial gearboxes. The data shows that this benefit is obtained using multiple aliphatic phosphites and the level of degradation depends on the underlying medium used.

１−実施例Ｂ−１、Ｂ−２、Ｂ−３、Ｂ−４およびＢ−５には、ＰＡＯの混合物である合成ＩＳＯ １５０基油を使用する。
２−実施例Ｂ−６およびＢ−７には、ＰＡＯおよびアルキルエステルコポリマーの混合物である合成ＩＳＯ １５０基油を使用する。
３−実施例Ｂ−８およびＢ−９には、ＰＡＯおよびアルキルエステルコポリマーの混合物である合成ＩＳＯ ３２０基油を使用する。
４−Ｂ−８およびＢ−９以外の、このセットにおける全ての実施例には、実施例セットＡにおいて使用されるものと同じ工業用のギアオイル添加剤パッケージを使用する。実施例Ｂ−８およびＢ−９には、異なる工業用のギアオイル添加剤パッケージを使用し、これは実施例セットＡにおいて使用されるパッケージと同じ成分を含むが、量において異なる。
５−Ｃ１８ホスファイトは、Ｃ１８アルキル基を有するジ−アルキル置換ホスファイトである。
６−Ｃ１６〜１８ホスファイトは、Ｃ１６〜１８アルキル基を有するジ−アルキル置換ホスファイトである。
７−それぞれの実施例は、内部で開発された手順によって試験され、この手順において、「Ｃ」型のギアは試験装置の中に取り付けられ、これら実施例の工業用のギア潤滑剤で潤滑され、慣らし期間を通して動作させられ、そしてその後３００Ｎｍの負荷の下で１７５０ｒｐｍで２時間試験される。ギアボックスの温度がモニタリングされ、そして報告される値は、温度が試験期間の間中安定化されていたところである。ベースラインと比較してより低い温度は、ギアボックスの動作温度の低下を示す。 Example set B
Further sets of examples of industrial gear lubricants are prepared in a variety of different base oils. These examples are summarized in the following table.

1- Examples B-1, B-2, B-3, B-4 and B-5 use a synthetic ISO 150 base oil which is a mixture of PAOs.
2—Examples B-6 and B-7 use a synthetic ISO 150 base oil that is a mixture of PAO and alkyl ester copolymer.
3—Examples B-8 and B-9 use a synthetic ISO 320 base oil that is a mixture of PAO and alkyl ester copolymer.
All the examples in this set, except 4-B-8 and B-9, use the same industrial gear oil additive package as used in Example Set A. Examples B-8 and B-9 use different industrial gear oil additive packages that contain the same ingredients as the package used in Example Set A, but differ in quantity.
5-C18 phosphite is a di-alkyl substituted phosphite having a C18 alkyl group.
6-C16-18 phosphite is a di-alkyl substituted phosphite having a C16-18 alkyl group.
7-Each example is tested by an internally developed procedure, in which a "C" type gear is installed in the test equipment and lubricated with the industrial gear lubricant of these examples. , Run through the break-in period, and then tested for 2 hours at 1750 rpm under a load of 300 Nm. The gearbox temperature is monitored and the reported value is where the temperature has stabilized during the test period. A lower temperature compared to the baseline indicates a reduction in gearbox operating temperature.

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

  Each document mentioned above is incorporated herein by reference. Unless otherwise indicated in the examples or otherwise, all numerical quantities in this specification specifying amounts, reaction conditions, molecular weight, number of carbon atoms, etc. Should be understood as being modified by: Unless otherwise indicated, all percentages and stated values are based on weight. Unless otherwise indicated, all molecular weights are number average molecular weights. Unless otherwise indicated, each chemical or composition referred to herein is generally understood to be present in isomers, by-products, derivatives, and commercial grades. Of such materials are to be construed as being commercially available grade materials. However, unless indicated otherwise, the amount of each chemical component is presented excluding any solvent or diluent, which can typically be present in commercially available materials. It is to be understood that the upper and lower amount, range, and ratio limits set forth herein may be independently combined. Similarly, the ranges and amounts for each element of the invention can be used in ranges and amounts for any other element. As used herein, the expression “consisting essentially of” is recognized to include substances that do not significantly affect properties to the basic and novel characteristics of the composition under consideration. All embodiments of the present invention described herein include open and inclusive views (ie, using the word “comprising”) as well as closed and exclusive views (ie, “ Can be considered and read from both perspectives (using the word “consisting of”).

  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. Specifically, this refers to a group having a carbon atom bonded directly to the rest of the molecule and having predominantly hydrocarbon character. Examples of hydrocarbyl groups include: (i) hydrocarbon substituents, ie, aliphatic (eg, alkyl or alkenyl), alicyclic (eg, cycloalkyl, cycloalkenyl) substituents, and aromatics Aromatic, aliphatic and alicyclic substituted aromatic substituents, and cyclic substituents in which the ring is completed through another part of the molecule (eg, two substituents together (Ii) a substituted hydrocarbon substituent, ie, a substituent containing a non-hydrocarbon group that does not change the main hydrocarbon nature of the substituent in the context of the present invention (eg, Halo (especially chloro and fluoro), hydroxy, alkoxy, mercapto, alkyl mercapto, nitro, nitroso and sulfoxy); (iii) hetero substituents, That is, having the main hydrocarbon character, but in the context of the present invention includes anything other than carbon in the ring or chain (other parts of the ring or chain are composed of carbon atoms) and pyridyl Substituents, including substituents such as, furyl, thienyl and imidazolyl. Heteroatoms include sulfur, oxygen and nitrogen. Generally, there are no more than 2 or 1 non-hydrocarbon substituents for every 10 carbon atoms in the hydrocarbyl group; or there may be no non-hydrocarbon substituents in the hydrocarbyl group .

  It is known that some of the materials described above can interact in the final formulation, so that the components of the final formulation can be different from those added initially. For example, a metal ion (eg, of a surfactant) can move to another acidic or anionic location of another molecule. Products so formed (including products formed when the composition of the invention is utilized in its intended use) may be easily described. Nevertheless, all such modifications and reaction products are included within the scope of the present invention; the present invention encompasses compositions prepared by admixing the components described above.

Claims (18)

An industrial gear composition for reducing the operating temperature of a gearbox in which the composition is used, the composition comprising:
(A) an oil of lubricating viscosity;
(B) an industrial gear lubricant additive package;
(C) a di-hydrocarbyl substituted aliphatic phosphite present in 2.0% or more by weight of the total composition, wherein the hydrocarbyl group has 16 to 18 carbon atoms When,
Only containing the composition does not contain an olefin oligomer, composition.   The composition of claim 1, wherein component (b) and component (c) are present in an amount such that the weight ratio of component (b) to component (c) is from 4: 1 to 1: 5.   The component (a), the oil of lubricating viscosity, comprises a Group I base oil, a Group II base oil, a Group III base oil, a synthetic base oil, any combination thereof, or 2. The composition according to 2.   Component (b), the industrial gear lubricant additive package, is one or more antiwear additives and / or extreme pressure agents, one or more rust inhibitors and / or corrosion inhibitors, one or more. The composition according to any one of claims 1 to 3, comprising an antifoaming agent, one or more demulsifiers or any combination thereof.   5. The composition of claim 4, wherein component (b), the industrial gear lubricant additive package, further comprises one or more friction modifiers.   Component (b), the industrial gear lubricant additive package, includes: one or more sulfurized olefins; one or more polysulfides; one or more phosphorus amine salts; one or more thiophosphate esters, one or more The thiadiazole, tolyltriazole, polyether and / or alkenylamine; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants or any combination thereof. Composition.   7. A composition according to any one of the preceding claims, wherein the composition is an industrial gear additive concentrate comprising up to 40% by weight of component (a).   7. A composition according to any preceding claim, wherein the composition is an industrial gear lubricant comprising at least 80% by weight of component (a). Component (b) is present at 1-5% by weight of the total industrial gear lubricant; and Component (c) is at 2.0-3.0% by weight of the total industrial gear lubricant. 9. A composition according to claim 8 present. A method of reducing the operating temperature of an industrial gearbox, the method comprising: (I) an industrial gear oil lubricant with aliphatic phosphite, and the lubricant is at least 2.0 wt. Adding a di-hydrocarbyl substituted aliphatic phosphite having a hydrocarbyl group of 18 carbon atoms, wherein the industrial gear oil lubricant does not contain an olefin oligomer ; and (II) the industrial Operating the industrial gear box while supplying the industrial gear oil lubricant to the industrial gear box.   At least a portion of the aliphatic phosphite is added to the industrial gear oil lubricant before the lubricant is supplied to the industrial gearbox, or at least one of the aliphatic phosphite. 11. The method of claim 10, wherein a portion is added to the industrial gear oil lubricant after the lubricant is supplied to the industrial gear box.   12. A component according to any of claims 10 to 11, wherein component (b) and component (c) are present in an amount such that the weight ratio of component (b) to component (c) is from 4: 1 to 1: 5. The method described in 1.   The component (a), the oil of lubricating viscosity, comprises a Group I base oil, a Group II base oil, a Group III base oil, a synthetic base oil, any combination thereof. The method according to any one of 12 to 12.   Component (b), the industrial gear lubricant additive package, is one or more antiwear additives and / or extreme pressure agents, one or more rust inhibitors and / or corrosion inhibitors, one or more. 14. A method according to any of claims 10 to 13 comprising an antifoaming agent, one or more demulsifiers or any combination thereof.   Component (b), the industrial gear lubricant additive package, is: one or more sulfurized olefins; one or more phosphorus amine salts; one or more thiophosphate esters, one or more thiadiazoles, tolyltriazole, poly 14. The ether and / or alkenylamine; one or more ester copolymers; one or more carboxylic acid esters; one or more succinimide dispersants; or any combination thereof. the method of.   The process according to any of claims 10 to 15, wherein the composition is an industrial gear additive concentrate comprising up to 40% by weight of component (a).   The method according to any of claims 10 to 16, wherein the composition is an industrial gear lubricant comprising at least 80% by weight of component (a). Component (b) is present at 1-5% by weight of the total industrial gear lubricant; and Component (c) is 1.0-10.0% by weight of the total industrial gear lubricant. 18. A method according to claim 17 present.