CN103205301B - Gear oil composition and preparation method thereof - Google Patents
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Abstract
The invention provides a gear oil composition and a preparation method thereof. The gear oil composition comprises lubricating oil base oil and a 2, 2, 4-trialkyl-1, 2-bihydroquinoline antioxygen and a metal deactivator. The gear oil composition provided by the invention has excellent oxidation stability and extreme pressure antiwear property, and meanwhile has excellent low temperature mobility, viscosity-temperature characteristics, shearing stability and anti-bubbling property, good comprehensive performance, and is simple in preparation method and wide in application range.
Description
Technical field
The present invention relates to a kind of gear oil composition, more particularly, relate to a kind of have superpower high-temperature oxidation resistant stability and the also gear oil composition of excellence of extreme pressure anti-wear.
Background technology
Along with the factor such as requirement, airflow design of design of gears precision, make the service temperature of gear, bearing load increasing, the tolerance between gear is more and more less, and gear tangential speed is accelerated.Therefore, the trend of gear oil development of new generation is to have more excellent oxidation stability and heat-resistant quality, to guarantee or to extend the drain period of oil product, meanwhile, also will have more excellent extreme pressure anti-wear, better antifriction energy-saving characteristic.
Conventionally the extreme pressure agent of sulfur-bearing, phosphorus, chlorine type and anti-wear agent (EP & AW) can provide good extreme pressure anti-wear to gear oil, and these additives can produce the acidic substance such as sulfuric acid in the time of thermooxidizing, not only accelerate oil oxidation, gone back etching apparatus.Therefore, with other types to compared with the less demanding lubricant of extreme pressure anti-wear, gear oil has harsher requirement to the compatibility synergistic effect of oxidation inhibitor, to guarantee extreme-pressure anti-wear and anti-oxidant dual property, but the gear lubrication oil production using now, often can only meet demand on the one hand, attend to one thing and lose sight of another.Chinese patent application CN200710178191.0 discloses a kind of novel lubricating oil compositions and can be used as industrial gear oil's use, although there is good oxidation stability, but extreme pressure and antiwear behavior is general, (wherein PB is 921N, PD is 2450N), the oil product that can accelerate equally in service of working lost efficacy, gear wear, reduces the life-span.Therefore the gear oil technology that, exploitation has strong anti-oxidation performance more and an extreme pressure and antiwear behavior excellence has become those skilled in the art's Research Challenges and focus.
Summary of the invention
the problem that invention will solve
An outstanding feature of the present invention is to obtain a kind of possess superpower oxidation-resistance and the gear oil composition of extreme pressure and antiwear behavior simultaneously.The present composition selects a kind of novel oxidation inhibitor combination to replace traditional phenol amine type oxidation inhibitor, has obtained superpower antioxidant property; This oxidation inhibitor combination has good compatibleness with the extreme pressure anti-wear additives of sulfur-bearing phosphorus, can guarantee that gear oil composition possesses superelevation antioxidant property and extreme pressure anti-wear; In addition the additive types of composition provided by the present invention is few, adds dosage low, and applied range is extremely beneficial to industry and applies.
for the scheme of dealing with problems
To achieve these goals, the invention provides a kind of gear oil composition, it comprises following component:
A, at least one lubricant base;
B, at least one 2,2,4-trialkyl-1,2-dihydroquinoline kind antioxidant;
C, at least one metal passivator;
D, at least one sulfur-containing extreme-pressure additive;
E, at least one phosphorous anti-wear agent;
F, at least one emulsion splitter;
G, at least one kilfoam.
In gear oil composition of the present invention, described lubricant base comprises mineral oil, vegetable and animals oils, synthetic oil, or their any mixture; Described 2,2,4-trialkyl-1,2-dihydroquinoline kind antioxidant is 2,2,4-trialkyl-1,2-dihydroquinoline monomer, its polymkeric substance, or their any mixture.
In gear oil composition of the present invention, described metal passivator is: benzotriazole or derivatives thereof, benzothiazole or derivatives thereof, thiadiazoles or derivatives thereof, benzoglyoxaline or derivatives thereof, toluene indazole or derivatives thereof, or their any mixture.
In gear oil composition of the present invention, described sulfur-containing extreme-pressure additive is: sulfide isobutene, dibenzyl disulfide, benzyldithio toluene, alkyl polysulfide, sulfuration methyl esters, sulfide fat oil, sulfuration rapeseed oil, sulfuration trimerization methylene acetone, zinc dialkyl dithiophosphate, dialkyl dithio amino formate, zinc dialkyl dithiocarbamate, dibutyl dithiocaarbamate antimony, dibutyl dithiocaarbamate lead, thiadiazoles dimer or derivatives thereof, 124 Triazole sulphur phosphoric acid ester or derivatives thereof, or their any mixture.
In gear oil composition of the present invention, described phosphorous anti-wear agent is: amine salt, sulphur phosphorus nitrogen containing derivative, thiophosphoric acid complex ester amine salt, amine salt of alkyl phosphate, chlorinated phosphate, phosphorous acid ester, single thiophosphate ester, phosphorus-containing carboxylic acid or the phosphorous organic carboxylic ester of phosphoric acid ester, phosphate ester acid, phosphate ester acid, or their any mixture.
In gear oil composition of the present invention, described emulsion splitter is polyoxy alkylidene ether, polyoxy alkylidene fatty acid ester, the condenses of amine and epoxy compounds, sulfonate type emulsion splitter, or their any mixture; Described kilfoam is siloxanes, organosilicon acid esters, polyalkyl acrylate, tensio-active agent, or their any mixture.
In gear oil composition of the present invention, take described gear oil composition gross weight as benchmark, the content of described B component is 0.1-5%, preferably 0.5-2%, more preferably 0.5-1.5%, most preferably 0.5-1%; The content of described C component is 0.01-0.5%, preferably 0.03-0.1%; Described D component and E component content are separately 0.1-5%, preferably 0.2-2.5%; The content of described F component is 0.0001-0.5%, preferably 0.001-0.1%; The content of described G component is 1-1000ppm, preferably 10-100ppm.
In gear oil composition of the present invention, the weight ratio of described B component and C component is 50:1-2:1, preferably 20:1-5:1, more preferably 10:1-5:1.
In gear oil composition of the present invention, described gear oil composition further optionally contains H component: other oxidation inhibitor, anti-wear agent, rust-preventive agent, friction modifiers, dispersion agent, sanitising agent, pour point depressant or their combination except described B, C, D, E, F and G component.
The preparation method of gear oil composition of the present invention comprises: at least one base oil of A component is joined in the container of band stirring, the H component that adds above-mentioned B component, C component, D component, E component, F component, G component again and optionally add is stirred to homogeneous transparent at 20-60 ℃.
the effect of invention
In gear oil composition provided by the present invention, contained B component is a kind of novel ketoamine kind antioxidant, can effectively prevent polymkeric substance depolymerization degraded; The combination of this oxidation inhibitor and metal passivator (C component) composition has good efficient oxidation stability and Synergistic antioxidation, is that traditional phenol amine antioxidants is incomparable; This is combined in sulphur phosphoric in extreme pressure anti-wear additives still can guarantee good resistance of oxidation under disturbing, and has improved Working Life of Lubricating Oil and drain period on largely; In addition, B component used also has corrosion-resisting function, even if do not add anticorrosive agent, also can guarantee that the copper corrosion of gear oil composition of the present invention is in 1 grade.
In the time that in gear oil composition of the present invention, base oil used is polyethers synthetic oil, because polyethers oxidative degradation is performed until low molecule carbonyl or carboxylic compound, at high temperature low molecule carbonyl or carboxylic compound gasification volatilization, do not generate settling and gelatinoid, guarantee the spatter property of oil product and gear and suppressed settling to form ability, therefore also can be prepared into the anti-oxidant gear oil composition of clean, without adding metal detergent.
Gear oil composition provided by the present invention not only has appropriate extreme pressure property, and oxidation stability and also excellence of erosion resistance, has low-temperature fluidity, sticky warm nature, shear stability and anti-bubble concurrently with high level, and over-all properties is good.
Embodiment
The mineral oil of A component of the present invention comprises petroleum base lubricating oil and intermediate base lubricating oil.Suitable having is selected from group I, the II of API (API) classification, the base oil of III, or their mixture.Specifically comprise the lubricating oil distillate being obtained by the air distillation of crude oil; The paraffinic hydrocarbons mineral oil obtaining as the proper combination of the process for refining such as solvent treatment, hydrofining, dewaxing, height hydrofining by suitable application; The refining base oil by isomerization dewaxing (Isodewax) technique; The refining base oil by Mobil wax isomerization process.Become the synthetic GTL(of Fischer-Tropsch method of liquid fuel to derive from the base oil of liquefaction of gases by Natural Gas Conversion).
Be applicable to the IV oil that the synthetic oil of A component of the present invention comprises API classification, as the polymkeric substance of various alkene or its hydride, can use separately a kind of alkene, also can be used in combination two or morely, what be applicable to has a poly-alpha olefins (PAO).Another kind of useful ucon oil includes but not limited to use terminal hydroxyl wherein by the in addition alkylene oxide polymer of modification of for example esterification or etherificate, these oil are illustrated as the polymkeric substance of preparing by the polymerization of oxyethane or propylene oxide, and the alkyl of these polyoxyalkylene polymers and phenyl ether, or their list and polycarboxylate.The useful synthetic oil of another class includes but not limited to the ester of dicarboxylic acid and various alcohol, and specific examples comprises Polycizer W 260, sebacic acid two (2-ethylhexyl) ester, fumaric acid di-n-hexyl ester, sebacic acid dioctyl ester, phthalic acid dioctyl ester, phthalic acid didecyl ester.Another kind of oil comprises silicon-based oil for example poly-alkyl, poly-aryl, poly-alkoxyl group or poly-aryloxy silicone oil and silicic acid ester oil, as tetraethyl orthosilicate, silicic acid four isopropyl esters, polymethyl siloxane etc.Also comprise that alkylbenzene is as dodecylbenzene, Tetradecylbenzene, dinonyl benzene; Polyphenyl is as biphenyl, terphenyl, alkylating polyphenyl etc.; Alkylating phenyl ether and alkylating diphenyl sulfide and their derivative, analogue and homologue.
Group I, II, III, IV and the GTL base oil of above-mentioned API classification mix use with other ethers oil, ester class oil, silica-based wet goods, and weight ratio is 1:99-99:1, preferably 50:50-95:5.
Base oil except group I, II, III, IV and the GTL base oil of API classification can use separately or and other any base oils mixing uses.
Above-described base oil is preferably 2mm according to 40 ℃ of viscosity of GB/T 265 test method measurings
2/ s-2000mm
2/ s, and preferred 40mm
2/ s-1000mm
2/ s.
Described B component is a kind of ketoamine kind antioxidant, very effective to the protection of thermo-oxidative ageing, and the catalyzed oxidation of metal is also had to extremely strong restraining effect, and toxicity is little.B component comprises 2,2,4-trialkyl-1,2-dihydroquinoline monomer, or the polymkeric substance of above monomer, or the mixture of monomer and polymkeric substance, and wherein the structural formula of monomer is:
Wherein, as the R1 of trialkyl part, R2, R3 can be identical or different, they can be independently selected from any alkyl that does not affect this compound antioxygen property, more suitable selection low carbon atom number alkyl, the alkyl of for example C1-C6, the preferably alkyl of C1-C4, as methyl, ethyl, n-propyl, sec.-propyl, butyl and isomer thereof, most preferably R1, R2, R3 is methyl.
R4 is selected from H, alkyl or alkoxyl group, in the time that R4 is alkyl, the preferably alkyl of C1-C20, as methyl, ethyl, propyl group, butyl, amyl group, hexyl, heptyl, octyl group, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, with and relevant isomer.In the time that R4 is alkoxyl group, the same preferably alkoxyl group of C1-C20, as methoxyl group, oxyethyl group, propoxy-, butoxy, pentyloxy, hexyloxy, heptan oxygen base, octyloxy, the ninth of the ten Heavenly Stems oxygen base, the last of the ten Heavenly stems oxygen base, undecane oxygen base, dodecyloxy, tridecane oxygen base, tetradecyloxyaniline, pentadecane oxygen base, n-Hexadecane oxygen base, heptadecane oxygen base, octadecane oxygen base, nonadecane oxygen base, eicosane oxygen base, with and relevant isomer.
2,2,4-trialkyl-1,2-dihydroquinoline polymer architecture formula is:
N is selected from the integer in 2-1000, preferably 2-10; More common 2,2,4-trialkyl-1,2-dihydroquinoline polymkeric substance comprises dimer, tripolymer, the tetramer, pentamer or the polymer of high-polymerization degree more, or their any mixture.
Described B component mention 2, 2, 4-trialkyl-1, in 2-dihydroquinoline monomer, more suitable has 2, 2, 4-trimethylammonium-1, 2-dihydroquinoline, 2-methyl-2, 4-diethyl-1, 2-dihydroquinoline, 2, 2, 4, 6-tetramethyl--1, 2-dihydroquinoline, 2, 2, 4, 7-tetramethyl--1, 2-dihydroquinoline, 2, 2, 4, 8-tetramethyl--1, 2-dihydroquinoline, 2, 8-dimethyl-2, 4-diethyl-1, 2-dihydroquinoline, 2, 7-dimethyl-2, 4-diethyl-1, 2-dihydroquinoline, 2, 6-dimethyl-2, 4-diethyl-1, 2-dihydroquinoline, 6-dodecyl-2, 2, 4-trimethylammonium-1, 2-dihydroquinoline, 6-oxyethyl group-2, 2, 4-trimethylammonium-1, 2-dihydroquinoline and 6, 6 '-bis-(2, 2, 4-trimethylammonium-1, 2-dihydroquinoline) etc.
The chain reaction of hydro carbons can be caused in metallic surface, the especially Cu of metal ion of trace
2+, Fe
3+, the oxidation of hydro carbons is played to katalysis.When adding metal passivator in lubricating oil, can suppress the katalysis of metal ion to oxidation.Be applicable to C component metals passivator of the present invention and have benzotriazole, tolyl-triazole, 4-alkyl benzotriazole, 5-alkyl benzotriazole, octyl group triazole, decyl triazole, dodecyl triazole, 2-mercaptobenzothiazole, 2,5-dimercapto-1,3,4-thiadiazoles, 2-alkyl dithio-5-sulfydryl-1, two (the alkyl dithio)-1 of 3,4-dithiadiazole and 2,5-, the derivative of 3,4-thiadiazoles, benzoglyoxaline, benzothiazole, toluene indazole and these materials.
These passivators or these two or more passivators of use capable of being combined can be used alone.
Described D component sulfur-containing extreme-pressure additive specifically comprises sulfide isobutene, dibenzyl disulfide, benzyldithio toluene, alkyl polysulfide, sulfuration methyl esters, sulfide fat oil, sulfuration rapeseed oil, sulfuration trimerization methylene acetone, zinc dialkyl dithiophosphate, dialkyl dithio amino formate, zinc dialkyl dithiocarbamate, dibutyl dithiocaarbamate antimony, dibutyl dithiocaarbamate lead, thiadiazoles dimer or derivatives thereof, 124 Triazole sulphur phosphoric acid ester or derivatives thereof, or their any mixture.
The phosphorous anti-wear agent of described E component is selected from amine salt, sulphur phosphorus nitrogen containing derivative, thiophosphoric acid complex ester amine salt, amine salt of alkyl phosphate, chlorinated phosphate, phosphorous acid ester, single thiophosphate ester, phosphorus-containing carboxylic acid and the phosphorous organic carboxylic ester of phosphoric acid ester, phosphate ester acid, phosphate ester acid.That can mention has one or more in tritolyl phosphate, phosphoramidate, acid di-n-butyl phosphite, iso-octyl acid phosphoric acid ester stearylamine salt, phosphorous acid di-n-octyl, phosphorous acid diisobutyl ester, Tributyl phosphate ester, trioctylphosphine phosphoric acid ester, tributyl thiophosphatephosphorothioate, trioctylphosphine thiophosphatephosphorothioate, triphenyl-thiophosphate, trimethylphenyl thiophosphatephosphorothioate etc.
These phosphorous anti-wear agents or these two or more phosphorous anti-wear agents of use capable of being combined can be used alone.
Described emulsion splitter (F component) is specifiable polyoxy alkylidene ether, polyoxy alkylidene fatty acid ester, or the condenses of amine and epoxy compounds, or sulfonate type emulsion splitter, for example polyoxyethylene polyoxypropylene propylene glycol, polyoxyethylene polyoxypropylene quadrol, polyoxyethylene polyoxypropylene ethyl phosphonic acid ester, Sodium dodecylbenzene sulfonate etc.
These emulsion splitters or these two or more emulsion splitters of use capable of being combined can be used alone.
Described kilfoam (G component) can be selected from siloxanes, organosilicon acid esters, polyalkyl acrylate, tensio-active agent etc.Can mention: dimethyl polysiloxane, fluorosilicone, diethyl silicon ester, polymethylmethacrylate, PFPE etc.
These kilfoams or these two or more kilfoams of use capable of being combined can be used alone.
Take gear oil composition gross weight of the present invention as benchmark, described B component concentration is 0.1-5%, preferably 0.5-2%, more preferably 0.5-1.5%, most preferably 0.5-1%; The content of described C component in gear oil composition is 0.01-0.5%, preferably 0.03%-0.1%, and wherein B component and metal passivator (C component) have anti-oxidant synergy, and two components by weight are 50:1-2:1, preferably 20:1-5:1, more preferably 10:1-5:1; Described D component sulfur-containing extreme-pressure additive and the phosphorous anti-wear agent of E component content are separately 0.1-5%, preferably 0.2-2.5%; The content of described F component emulsion splitter can be 0.0001-0.5%, preferably 0.001-0.1%; The content of described G component kilfoam can be 1-1000ppm, preferably 10-100ppm; All the other content are base oil.
Gear oil composition of the present invention can also contain H component: the conventional additive of gear oil such as other oxidation inhibitor except described B, C, D, E, F, G component, anti-wear agent, rust-preventive agent, friction modifiers, dispersion agent, sanitising agent, pour point depressant, all these additives can use the blend according to conventional methods of commercially available material.Generally, the add-on of these other oxidation inhibitor, anti-wear agent, friction modifiers is 0.01-1.5%, and rust-preventive agent add-on is 0.01-3%, and the add-on of dispersion agent, sanitising agent is 0.01-5%, and the add-on of pour point depressant is 0.01-0.5%.
The preparation method of gear oil composition provided by the invention comprises: one or more base oils are joined in the container of band stirring, the H component that adds above-mentioned B component, C component, D component, E component, F component, G component again and optionally add is stirred to homogeneous transparent at 20-60 ℃.
Below provide embodiments of the invention.It should be noted that, these embodiment are only illustrative, the invention is not restricted to these embodiment." part " using in embodiment represents weight part.
< embodiment >
Embodiment 1
By the 100 parts of insoluble polyethers base oil of water Emkarox VG222(Croda Company, Inc, lower same) join in the stainless steel mediation still of belt stirrer, maintain still temperature at 40 ℃, again successively by the Naugalube TMQ(2 of 0.6 part, 2, 4-trimethylammonium-1, 2-dihydroquinoline kind antioxidant, Uniroyal Chemical Company, Inc. lower same), metal passivator 124 Triazole analog derivative T551(Jinzhou Kangtai Lube Additive Co., Ltd. of 0.08 part, lower same), 1 part of anti-wear agent phosphoric acid nonyl ester amine salt mixture Irgalube349 (Ciba Specialty Chemicals Inc), 0.5 part of amino monothioester T323 of extreme pressure agent (Jinzhou Tian Bu lubricating oil additive company limited), 0.002 part of T901 methyl-silicone oil (Jinzhou Kangtai Lube Additive Co., Ltd., lower same), 0.003 part of emulsion splitter propylene oxide/epoxyethane block copolymer
5957(Lubrizol Petroleum Chemical Company, lower with) join and be in harmonious proportion in still, start and be stirred to mixture and all dissolve, homogeneous transparent, obtains finished product gear oil A.
Comparative example 1
The stainless steel that the 100 parts of insoluble polyethers base oil of water Emkarox VG222 is joined to belt stirrer is in harmonious proportion in still, maintain still temperature at 40 ℃, more successively by the butyl octyl pentanoic of 0.6 part, the 124 Triazole analog derivative T551 of 0.08 part, 1 part of anti-wear agent Irgalube349,0.5 part of amino monothioester T323 of extreme pressure agent, 0.002 part of T901,0.003 part
5957 join and are in harmonious proportion in still, start to be stirred to mixture and all to dissolve, and homogeneous transparent, obtains finished product gear oil B.
Comparative example 2
The stainless steel that the 100 parts of insoluble polyethers base oil of water Emkarox VG222 is joined to belt stirrer is in harmonious proportion in still, maintain still temperature at 40 ℃, more successively by the Naugalube TMQ of 0.6 part, 1 part of anti-wear agent Irgalube349,0.5 part of amino monothioester T323 of extreme pressure agent, 0.002 part of T901,0.003 part
5957 join and are in harmonious proportion in still, start to be stirred to mixture and all to dissolve, and homogeneous transparent, obtains finished product gear oil C.
Embodiment 2
By the 100 parts of insoluble polyethers base oil of water Emkarox VG222(Croda Company, Inc, lower same) join in the stainless steel mediation still of belt stirrer, maintain still temperature at 40 ℃, again successively by the Naugalube TMQ of 0.8 part, the metal passivator T551 of 0.1 part, 1 part of anti-wear agent tritolyl phosphate, 0.4 part of extreme pressure agent vanlube972(2,5-dimercapto-1,3, the mixture of 4-Thiadizole dimer and butoxytriglycol, R.T.Vanderbilt Holding Company, Inc), 0.003 part of T901,0.005 part of emulsion splitter
5957 join and are in harmonious proportion in still, start to be stirred to mixture and all to dissolve, and homogeneous transparent, obtains finished product gear oil D.
Gear oil composition A, the B, C and the D that obtain, result verification is in table 1 after tested.
Table 1
Table 1 data results shows, 2,2,4-trialkyl-1,2-dihydroquinoline kind antioxidant and metal passivator have certain Synergistic antioxidation, add gear oil composition A and the D of this two component to add 2,2 than only simultaneously, 4-trialkyl-1, the gear oil composition C of 2-dihydroquinoline kind antioxidant has more excellent oxidation-resistance.In addition, the gear oil composition B that adds traditional amine antioxidants is suitable with D with composition A at aspects such as extreme pressure anti-wear, anti-bubble, demulsification resistance, erosion resistances, but antioxidant property a little less than.
Embodiment 3
Except extreme pressure agent is changed to sulfide isobutene, all the other obtain finished product gear oil E entirely with embodiment 2.This oil product antioxidant property adopts means of differential scanning calorimetry (DSC) test evaluation, test conditions: the heavy 2.00mg of test sample, and oxygen flow is 100ml/min, in dynamic testing, temperature rise rate is 5 ℃/min.In static oxidation test, temperature is 200 ℃.Oxidation test test result is in table 2.
Table 2
Can be drawn by table, gear oil composition of the present invention has outstanding high temperature antioxidant.
Claims (10)
1. a gear oil composition, it comprises following component:
A, at least one lubricant base;
B, at least one 2,2,4-trialkyl-1,2-dihydroquinoline kind antioxidant;
C, at least one metal passivator;
D, at least one sulfur-containing extreme-pressure additive;
E, at least one phosphorous anti-wear agent;
F, at least one emulsion splitter;
G, at least one kilfoam,
Take described gear oil composition gross weight as benchmark, the content of described B component is 0.5-1.5%; The content of described C component is 0.03-0.1%; Described D component and E component content are separately 0.1-5%; The content of described F component is 0.0001-0.5%; The content of described G component is 1-1000ppm,
Described 2,2,4-trialkyl-1,2-dihydroquinoline kind antioxidant is 2,2,4-trialkyl-1,2-dihydroquinoline monomer, its polymkeric substance, or their any mixture,
Described metal passivator is: benzotriazole, tolyl-triazole, 4-alkyl benzotriazole, 5-alkyl benzotriazole, octyl group triazole, decyl triazole, dodecyl triazole, 2-mercaptobenzothiazole, 2,5-dimercapto-1,3,4-thiadiazoles, 2-alkyl dithio-5-sulfydryl-1,3,4-dithiadiazole and 2, two (the alkyl dithio)-1 of 5-, one in 3,4-thiadiazoles, benzoglyoxaline, benzothiazole, toluene indazole or two or more
The weight ratio of described B component and C component is 50:1-2:1.
2. gear oil composition according to claim 1, is characterized in that described lubricant base comprises mineral oil, vegetable and animals oils, synthetic oil, or their any mixture.
3. gear oil composition according to claim 1 and 2, it is characterized in that described sulfur-containing extreme-pressure additive is: sulfide isobutene, dibenzyl disulfide, benzyldithio toluene, alkyl polysulfide, sulfuration methyl esters, sulfide fat oil, sulfuration rapeseed oil, sulfuration trimerization methylene acetone, zinc dialkyl dithiophosphate, dialkyl dithio amino formate, zinc dialkyl dithiocarbamate, dibutyl dithiocaarbamate antimony, dibutyl dithiocaarbamate lead, thiadiazoles dimer or derivatives thereof, 124 Triazole sulphur phosphoric acid ester or derivatives thereof, or their any mixture.
4. gear oil composition according to claim 1 and 2, it is characterized in that described phosphorous anti-wear agent is: amine salt, sulphur phosphorus nitrogen containing derivative, thiophosphoric acid complex ester amine salt, amine salt of alkyl phosphate, chlorinated phosphate, phosphorous acid ester, single thiophosphate ester, phosphorus-containing carboxylic acid or the phosphorous organic carboxylic ester of phosphoric acid ester, phosphate ester acid, phosphate ester acid, or their any mixture.
5. gear oil composition according to claim 1 and 2, is characterized in that described emulsion splitter is polyoxy alkylidene ether, polyoxy alkylidene fatty acid ester, the condenses of amine and epoxy compounds, sulfonate type emulsion splitter, or their any mixture; Described kilfoam is siloxanes, organosilicon acid esters, polyalkyl acrylate, tensio-active agent, or their any mixture.
6. gear oil composition according to claim 1 and 2, is characterized in that, take described gear oil composition gross weight as benchmark, the content of described B component is 0.5-1%; Described D component and E component content are separately 0.2-2.5%; The content of described F component is 0.001-0.1%; The content of described G component is 10-100ppm.
7. gear oil composition according to claim 1 and 2, the weight ratio that it is characterized in that described B component and C component is 20:1-5:1.
8. gear oil composition according to claim 7, the weight ratio that it is characterized in that described B component and C component is 10:1-5:1.
9. gear oil composition according to claim 1 and 2, is characterized in that described gear oil composition further optionally contains H component: other oxidation inhibitor, anti-wear agent, rust-preventive agent, friction modifiers, dispersion agent, sanitising agent, pour point depressant or their combination except described B, C, D, E, F and G component.
10. according to the preparation method of the gear oil composition described in claim 1-9 any one, comprise: at least one base oil of A component is joined in the container of band stirring, the H component that adds above-mentioned B component, C component, D component, E component, F component, G component again and optionally add is stirred to homogeneous transparent at 20-60 ℃.
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