CN1203264A - Gear lubricating oil composition - Google Patents
Gear lubricating oil composition Download PDFInfo
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- CN1203264A CN1203264A CN 97112340 CN97112340A CN1203264A CN 1203264 A CN1203264 A CN 1203264A CN 97112340 CN97112340 CN 97112340 CN 97112340 A CN97112340 A CN 97112340A CN 1203264 A CN1203264 A CN 1203264A
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Abstract
A composite lubricant for gears used in gear-shifting box or rear drive bridge of truck or bus contains mineral oil as basic oil, at least one S-containing extreme-pressure antiwearing agent, at least one P-containing extreme-pressure antiwearing agent, at least one oily agent, at least one cleaning disperser, at least one metal passivating agent and/or antioxidizing agent, at least one pour point depressant and at least one defoamer, and features high quality.
Description
The present invention relates to a kind of gear lubricating oil composition, especially a kind of gear lubricating oil composition that is used for load-carrying vehicle and motorbus manual transmission and rear driving axle belongs to the lubricant technical field.
In recent years, recommended out load-carrying vehicle and motorbus manual transmission dedicated gear fuel oil meter lattice abroad, as API MT-I (or PG-I) specification of the U.S..Before this, the lubricated general API GL-4 of employing or the GL-5 class rear driving axle gear grease of load-carrying vehicle manual transmission gear replace.Power along with the manual transmission transmission constantly increased afterwards, and designed reduced volume gradually, thereby the working temperature of lubricating oil raises.The API GL-4 gear oil that does not have the thermal oxidation stability requirement, or the not so good API GL-5 gear oil of thermal oxidation stability in use generate more oxidation products, and as paint film, sludge deposition influences works better on the parts of manual transmission.Simultaneously, manual transmission extensively adopts synchronizer, and its copper alloy parts have proposed harsher restriction to the corrodibility of gear oil.API MT-I (or PG-1) specification has not only increased the requirement of CRCL-60 thermal oxidation stability, and copper corrosion (ASTM D130) is reduced to maximum value 2A level from the maximum value 3B level of API GL-4 and GL-5 gear oil.Obviously, present API GL-4 and GL-5 backgear oil are difficult to satisfy the requirement of modern manual transmission to lubricating oil.
China's load-carrying vehicle and motorbus almost all are to adopt manual transmission.Up to the present, all use general rear driving axle gear oil APIGL-3 and GL-4 (also claim light, in, the load gear oil) substitute lubricating oil, and do not have the manual transmission special oil.
Therefore, the objective of the invention is: a kind of load-carrying vehicle and motorbus manual transmission lubricating oil composition are provided, can satisfy 85 simultaneously
w/ 90 or 80
w/ 90 manual gear box oils and in the requirement of the super API GL-4 rear driving axle gear oil of wind motor corporation.
The present invention selects meticulously to each component in the lubricating oil composition to achieve these goals.Base oil selective oxidation stability is deep refining mineral oil (mineral oil that comprises solvent treatment and two kinds of explained hereafter of hydrotreatment) preferably.Or synthetic oil, or their mixture.To binder component, except consider they self performance and with conspicuous characteristics and outstanding, simultaneously also thermal oxidation stability and to the adaptability quality of sealing material as one of condition of preferentially selection.Because thermal oxidation stability and extreme pressure, resistance to abrasion, or with other performance, often binder component select and their combination in be conflicting.Be thermal oxidation stability binder component or combination preferably, and extreme pressure, resistance to abrasion, or other performance is relatively poor.Thereby only depend on the selection binder component can't realize above-mentioned purpose fully, and also must be to each binder component in the composition, each performance requriements carries out balance in the specification by satisfy comprehensively.Particularly, select plural different compound, consider just and be convenient to realize above-mentioned " balance " phosphorous extreme pressure, antiwear agents (B).
Gear lubricating oil composition of the present invention, it contains (A) a large amount of mineral oil, or synthetic oil, or their mixture; (B) at least a sulfur-bearing extreme pressure, antiwear agents; (C) at least a phosphorous extreme pressure, antiwear agents; (D) at least a oiliness improver; (E) at least a peace and quiet, dispersion agent; (F) at least a metal passivator, and/or oxidation inhibitor; (G) at least a pour point depressant; (H) at least a kilfoam.
The MVI mineral oil that said (A) is deep refining, or HVI mineral oil, or synthetic oil (PAO), or their mixture.Its content 70-98% (weight) in said composition, suitable content is 90-98% (weight).
Said (B) is suitably olefine sulfide, the Auglamol33 product that can produce from Lubrizol company, or obtain in other analogous products.Its content 0.1～10% (weight) in said composition, suitable content is 1-8% (weight).
Said (C) is phosphorous acid ester and derivative thereof, or multiple ester of sulphur phosphoric acid and derivative thereof, or phosphoric acid ester and amine salt derivative thereof, or thiophosphatephosphorothioate and amine salt derivative thereof, or zinc dialkyl dithiophosphate and derivative thereof, or the mixture of their arbitrary combination.Be suitably acid phosphorous acid dodecyl ester, or the multiple ester amine salt of sulphur phosphoric acid (can be from the T307 product of Nanjing Ai Di minister industrial corporation production, or obtain in other analogous products), or tritolyl phosphate (the T306 product that can produce from Peng Pu chemical plant, Shanghai, or obtain in other analogous products), or boronation thiophosphatephosphorothioate amine salt (can be pressed the product that Chinese patent .96103373.8 produces from Lanzhou oil-refining chemical head factory, or obtain in other like product), or tributyl thiophosphate, or iso-octyl acid phosphoric acid ester stearylamine salt (the T308 product that the chemical plant of can setting a prairie fire from Lanzhou produces, or obtain in other analogous products), or the subsalt of dioctyl zinc dithiophosphate (can be from the LAN203 of Lanzhou oil-refining chemical head factory production, or obtain in other analogous products), or their mixture.The content 0.05～5% (weight) of component (C) in said composition, suitable content is 0.1-5% (weight).
Said (D) is suitably oleic acid glycol ester (can be from the LAN403 product of Lanzhou oil-refining chemical head factory production, or obtain in other analogous products), or 124 Triazole stearylamine salt (can be from the Nanjing T406 product produced of three friendly Fine Chemical Works, or obtain in other analogous products), or sulfuration oleum gossypii seminis (can produce T404 from Shanghai Shanghai Gaoqiao petro-chemical corporation obtains), or their mixture.Its content 0.01～5% (weight) in said composition, suitable content is 0.05-5% (weight).
Said (E) is suitably two succimides (can be from the LAN152 product of Lanzhou oil-refining chemical head factory production, or obtain in other analogous products), or organic sulfonic acid calcium (the T102 product that can produce from Shanghai Gaoqiao petro-chemical corporation, or obtain in other analogous products), or their mixture.It is content 0.01～5% (weight) in said composition, and suitable content is 0.05-5% (weight).
Said (F) is suitably thiadiazoles derivative, (the LAN561 product that can produce from Lanzhou oil-refining chemical head factory, or obtain in other analogous products), or the dinonyldiphenylamine compounds, or their mixture.Its content 0.001～3% (weight) in said composition, suitable content 0.01-3% (weight).
Said (G) is suitably the alkylnaphthalene class (can be from the T801 product of Dalian Petrochemical Industry Company's production, or obtain in other analogous products), or polymethacrylate (can be from the T602 product of Shanghai Gaoqiao petro-chemical corporation production, or obtain in other analogous products), or the poly-alpha olefins class (can be from the LAH803A.LAN803B product of Lanzhou oil-refining chemical head factory production, or obtain in other analogous products), or their mixture.Its content 0.01～5% (weight) in said composition, suitable content is 0.1-5% (weight).
Said (H) is suitably poly-methyl-silicone oil compounds (can produce from the T901 that resin factory in Shanghai produces and obtain).Its content 1～100mg/kg or ppm in said composition, suitable content is 5-50mg/kg or ppm.
The preparation method of said gear oil lubrication oil compositions carries out in two steps: the first step is that (B) to (F) component is mixed into recombiner in the said lubricating oil composition.Promptly the thinning oil of first aequum in proportion adds in the blending kettle of belt stirrer; Secondly oiliness improver of aequum (D) and detergent-dispersant additive (E) add in the thinning oil in proportion, and mixture under agitation is warming up to 60～70 ℃, stir 2～4 hours then to dissolving fully; Mixture is reduced to 30～50 ℃ at last, add the sulfur-bearing extreme pressure of aequum in proportion again, antiwear agents (B), phosphorous extreme pressure, antiwear agents (C) and metal passivator, and/or oxidation inhibitor (F), and stirred 4～6 hours down at 30～50 ℃, all dissolve to mixture, obtain recombiner; Second step was that the base oil of aequum (A) is in proportion added blending kettle, under agitation be warming up to 50～60 ℃, the poly-methyl-silicone oil (H) and the pour point depressant (G) that will disperse, be diluted to 1000 times then with colloidal mill add base oil respectively, stir 2～4 hours down at 50～60 ℃.Down add the recombiner for preparing, and stirred 2～4 hours at 50～60 ℃ at last, until whole dissolvings.
In order to screen binder component and lubricating oil composition, the present invention adopts the test of baking oven oxidation test simulation CRCL-60 gear stand thermal oxidation stability in the laboratory.Test conditions: the 250ml beaker is put in 100 gram formation testings, and immerses No. 45 steel test pieces of polishing in oil.Then beaker is placed baking oven, 150 ℃ of following constant temperature oxidations 192 hours.After the off-test, take out the steel test piece and clean, steel test piece surface color is changed estimate.0 grade is nondiscoloration; 1 grade is variable color slightly; 2 grades is local pale; 3 grades is most of pale; 4 grades is ash, blue, yellow, or canescence; 5 grades are local grey black, and peel off.To cup bottom sediment amount not have, less, medium, multilist shows.
To the formation testing extreme pressure, resistance to abrasion adopts four ball extreme pressure test (GB/T 3142 methods) evaluation.
Whether meet the tentative specification that is equivalent to API MT-1 (or PG-1) in order to estimate lubricating oil composition, need to press API MT-I specification, carry out copper corrosion (GB/T5096 or ASTMD130), FZG gear machine test (SH/T0306 or ASTM D5182), the stable test of CRCL-60 thermooxidizing (SH/T 0520 or FTM2504), the sealing material compatibility test, wheel box round-robin test (east wind company method).With the APIMT-I difference be, the sealing material adaptability in the tentative specification, the wheel box round-robin test is to adopt Chinese Dong Feng Auto Corporation method.Also appended low speed, high moment of torsion back axle gear stand test (EQC-120-90 method) in addition, and the formation testing temperature is elevated to 135 ℃ from original 115 ℃.
Effect of the present invention further specifies by the following examples.But should be understood that the following examples do not limit the scope of the invention.Any change that does not exceed design of the present invention and scope, all within the scope of the present invention.No specified otherwise, used temperature is degree centigrade among the present invention, used percentage ratio (%) is weight percentage.
Embodiment 1:
Additive therefor composition (L) comprising among the present invention:
64.1% olefine sulfide, 25.6%LAN203 dioctyl zinc dithiophosphate subsalt and tritolyl phosphate are with 1: 1 mixture, 5.1%T102 organic sulfonic acid calcium, 2.6%LAN561 thiadiazoles.And compositions of additives (M) is except that containing T306 tritolyl phosphate phosphor-included additive component, all the other all same compositions of additives (L).With compositions of additives (L) and (M) add respectively and contained in the 85w/90 base oil (seeing Table 1) of pour point depressant and kilfoam, add-on is 3.75%.Gained lubricating oil composition (I) and performance (II) are listed in table 2.
100 ℃ of kinematic viscosity of table 1 85w/90 base oil character project, mm
2/ s 19.37-12 ℃ apparent viscosity, mpa.s 117400 pour points, ℃-18 flash-points (opening), ℃ 245
Annotate: the T901 that is added with 0.5%LAN803B and 10mg/kg
Table 2. extreme pressure. (121 ℃ of resistance to abrasion and thermal oxidation stability project team compound (I) composition (II) copper corrosions, 3 hours), level 1A 1A four ball extreme pressure test, the PB value, N 882 784 baking oven oxidation tests
100 ℃ of viscosity increase, and % 18.9 58.1
The no steel disc evaluation of greasy filth amount, level 15
Test-results shows that lubricating oil composition (II) only contains a kind of phosphorous extreme pressure, and antiwear agents, not only thermal oxidation stability variation, and extreme pressure, wear resistance are also not as composition (I).
Embodiment 2
Additive therefor composition of the present invention (N) comprising: 61.5% olefine sulfide, multiple ester amine salt of 25.6% sulphur phosphoric acid and boronation thiophosphatephosphorothioate amine salt were with 1: 1 mixture, 2.6%T406 124 Triazole stearylamine salt, 7.7%T102 organic sulfonic acid calcium, 2.6%LAN561 thiadiazoles.Compositions of additives (P) comprising: 66.6% olefine sulfide, multiple ester amine salt of 27.8%T307 sulphur phosphoric acid and boronation thiophosphatephosphorothioate amine salt are with 1: 1 mixture, 2.8%T406 124 Triazole stearylamine salt, 2.8%LAN561.Two compositions (N) and (P) add with 3.75% and 3.74% respectively and contained in the 85w/90 base oil (seeing Table 1) of pour point depressant and kilfoam, lubricating oil composition that obtains (III) and performance (IV) are listed in table 3.
Table 3. extreme pressure. (121 ℃ of resistance to abrasion and thermal oxidation stability project team compound (III) composition (IV) copper corrosions, 3 hours), level 2A 2A four ball extreme pressure test, the PB value, N 833 1176 baking oven oxidation tests
The greasy filth amount is many less
Steel disc is estimated, level 15
Test-results shows that composition (IV) does not contain organic calcium sulphonate, extreme pressure, and resistance to abrasion obviously has improvement than composition (III), but thermal oxidation stability is also obviously than latter variation.
Embodiment 3
Additive therefor composition of the present invention (Q) comprising: 65.8% olefine sulfide, 26.3%LAN203 (dioctyl zinc dithiophosphate subsalt) and the mixture of acid phosphorous acid dodecyl ester with 1: 1,2.6%T406 124 Triazole stearylamine salt, 5.3%LAN152 (two succimide).It adds with 3.66% and has contained in the 85w/90 base oil (seeing Table 1) of pour point depressant and kilfoam.The assessment of performance of gained lubricating oil composition (V) the results are shown in table 4 and 5.
(121 ℃ of the external reference oil * copper corrosions of table 4.FZG and imitative L-60 bench testing project team's compound (V), 3 hours), the test of level 1A 1AFZG gear machine, the failure level increases greater than 100 ℃ of viscosity of 11 imitative L-60 oxidation stability tests greater than 11, % 18.4 59.2 pentane insolubles, % 0.564 0.612 toluene insolubles, % 0.371 0.507
Annotate: * 85w/90 base oil adds 3.66% external GL-5 recombiner.
Table 4 is the result show, the copper corrosion of composition (V) is suitable with the reference oil performance with the FZG test, but imitative L-60 oxidation stability is better than the latter.
The test of table 5 east wind back axle gear stand harshnessization
| Formation testing | Pinion(gear) surface luster wearing and tearing scratch | The master wheel surface | Copper spare surface | Anti-long-pending thing |
| The GL-4 reference oil | Dark do not have | No scratch | Black | Paint film is arranged |
| External reference oil * | Light is slight serious | Scratch is arranged | Black | Do not have |
| Composition (V) | Light is more serious | Scratch is arranged | Nondiscoloration | Do not have |
Annotate: * 35w/90 base oil adds 3.66% external GL-5 recombiner
As shown in Table 5, composition (V) is with abroad reference oil is all because of wearing and tearing, and scratch is seriously and not by the test of east wind back axle gear stand harshnessization.But aspect the settling of surface corrosion of copper spare and generation, composition (V) is obviously than good by the GL-4 reference oil of east wind back axle gear stand test.
Claims (17)
1, a kind of gear lubricating oil composition is characterized in that it contains:
(A) a large amount of mineral oil and/or synthetic oil and a spot of
(B) at least a sulfur-bearing extreme pressure, antiwear agents;
(C) at least a phosphorous extreme pressure, antiwear agents;
(D) at least a oiliness improver;
(E) at least a detergent-dispersant additive;
(F) at least a metal passivator, and/or oxidation inhibitor;
(G) at least a pour point depressant;
(H) at least a kilfoam.
2, lubricating oil composition according to claim 1 is characterized in that said (A) is medium viscosity index M VI mineral oil, or high viscosity index (HVI) HVI mineral oil, or synthetic oil (PAO), or their mixture.
3, lubricating oil composition according to claim 1 is characterized in that said composition contains the mineral oil of 70-98% (weight), and/or synthetic oil (A).
4, lubricating oil composition according to claim 1 is characterized in that said (B) is suitably the olefine sulfide compounds.
5, lubricating oil composition according to claim 1 is characterized in that it is 1-8% (weight) that said composition contains the suitable content of (B) component 0.1～10% (weight).
6, lubricating oil composition according to claim 1 is characterized in that said (C) is phosphorous acid ester and derivative thereof, or multiple ester of sulphur phosphoric acid and derivative thereof, or phosphoric acid ester and amine salt derivative thereof, or phosphorothioate ester and amine salt derivative thereof; Or zinc dialkyl dithiophosphate and derivative thereof, or the mixture of their arbitrary combination, be suitably acid phosphorous acid dodecyl ester, or the multiple ester amine salt of sulphur phosphoric acid, or tritolyl phosphate, or boronation thiophosphatephosphorothioate amine salt, or tributyl thiophosphate, or iso-octyl acid phosphoric acid ester stearylamine salt, or the subsalt of dioctyl zinc dithiophosphate, or the mixture of their arbitrary combination.
7, lubricating oil composition according to claim 1 is characterized in that said composition contains (C) component 0.05～5% (weight), and suitable content is 0.1-5% (weight).
8, lubricating oil composition according to claim 1 is characterized in that said (D) is suitably oleic acid glycol ester, or 124 Triazole stearylamine salt, or sulfuration oleum gossypii seminis, or the mixture of their arbitrary combination.
9, lubricating oil composition according to claim 1 is characterized in that said composition contains (D) component 0.01～5% (weight), and suitable content is 0.05-5% (weight)
10, lubricating oil composition according to claim 1 is characterized in that said (E) is suitably two succimides, or organic sulfonic acid calcium (base number 20～300mgKOH/g), or their mixture.
11, lubricating oil composition according to claim 1 is characterized in that said composition contains (E) component 0.01～5% (weight), and suitable content is 0.05-5%.
12, lubricating oil composition according to claim 1 is characterized in that said (F) is suitably thiadiazoles derivative, or the dinonyldiphenylamine compounds, or their mixture.
13, lubricating oil composition according to claim 1 is characterized in that said composition contains (F) component 0.001～3% (weight), and suitable content is 0.01-3% (weight)
14, lubricating oil composition according to claim 1 is characterized in that said (G) is suitably the alkylnaphthalene class, or polymethacrylate, or the poly-alpha olefins class, or their mixture.
15, lubricating oil composition according to claim 1 is characterized in that said composition contains (G) component 0.01～5% (weight), and suitable content is 0.1-5% (weight).
16, lubricating oil composition according to claim 1 is characterized in that said (H) is suitably poly-methyl-silicone oil compounds.
17, lubricating oil composition according to claim 1 is characterized in that said composition contains (H) component 1～100mg/kg or ppm, and suitable content is 5～50mg/kg or ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112340A CN1058520C (en) | 1997-06-23 | 1997-06-23 | Gear lubricating oil composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112340A CN1058520C (en) | 1997-06-23 | 1997-06-23 | Gear lubricating oil composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1203264A true CN1203264A (en) | 1998-12-30 |
| CN1058520C CN1058520C (en) | 2000-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112340A Expired - Lifetime CN1058520C (en) | 1997-06-23 | 1997-06-23 | Gear lubricating oil composition |
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| CN (1) | CN1058520C (en) |
Cited By (17)
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| CN1120882C (en) * | 2000-09-23 | 2003-09-10 | 中国科学院兰州化学物理研究所 | Composite additive of lubricating oil for industrial gear turbine |
| CN101298578B (en) * | 2007-04-30 | 2010-09-08 | 中国石油天然气股份有限公司 | Sedan hand gearshift case gear lubricating oil composition |
| CN1962836B (en) * | 2005-11-08 | 2010-10-06 | 中国石油化工股份有限公司 | Open type gear oil composition |
| CN101298574B (en) * | 2007-04-30 | 2010-12-15 | 中国石油天然气股份有限公司 | Universal industrial gear oil additive composition |
| CN101993763A (en) * | 2009-08-26 | 2011-03-30 | 比亚迪股份有限公司 | Gear oil composition for automobile |
| CN102046763A (en) * | 2008-05-29 | 2011-05-04 | 雪佛龙美国公司 | Gear oil compositions, methods of making and using thereof |
| CN102191117A (en) * | 2010-03-10 | 2011-09-21 | 中国石油天然气股份有限公司 | Tractor five-purpose lubricating oil composition |
| CN102277226A (en) * | 2011-07-22 | 2011-12-14 | 江苏龙蟠石化有限公司 | Hydrodynamic drive lubricating oil composite for engineering plant |
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| CN102639685A (en) * | 2009-11-19 | 2012-08-15 | 株式会社捷太格特 | Lubricant oil, friction member, and gear-type differential having limited slip function |
| CN102676282A (en) * | 2012-03-22 | 2012-09-19 | 上海东昊油品有限公司 | Special oil for automatic gearbox of AMT (automatic manual transmission) |
| CN102766507A (en) * | 2011-05-06 | 2012-11-07 | 中国石油天然气股份有限公司 | Lubricant composition for double-clutch gearbox |
| CN103484224A (en) * | 2013-10-15 | 2014-01-01 | 中国石油化工股份有限公司 | Gear oil composition and preparation method thereof |
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| US4752416A (en) * | 1986-12-11 | 1988-06-21 | The Lubrizol Corporation | Phosphite ester compositions, and lubricants and functional fluids containing same |
| US4832867A (en) * | 1987-10-22 | 1989-05-23 | Idemitsu Kosan Co., Ltd. | Lubricating oil composition |
| CN1020044C (en) * | 1990-06-20 | 1993-03-10 | 中国石油化工总公司石油化工科学研究院 | EP oil composition for industrial gears |
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| CN1120882C (en) * | 2000-09-23 | 2003-09-10 | 中国科学院兰州化学物理研究所 | Composite additive of lubricating oil for industrial gear turbine |
| CN1962836B (en) * | 2005-11-08 | 2010-10-06 | 中国石油化工股份有限公司 | Open type gear oil composition |
| CN101298576B (en) * | 2007-04-30 | 2012-05-09 | 中国石油天然气股份有限公司 | Gear lubricating oil additive composition |
| CN101298578B (en) * | 2007-04-30 | 2010-09-08 | 中国石油天然气股份有限公司 | Sedan hand gearshift case gear lubricating oil composition |
| CN101298574B (en) * | 2007-04-30 | 2010-12-15 | 中国石油天然气股份有限公司 | Universal industrial gear oil additive composition |
| CN102046763A (en) * | 2008-05-29 | 2011-05-04 | 雪佛龙美国公司 | Gear oil compositions, methods of making and using thereof |
| CN101993763A (en) * | 2009-08-26 | 2011-03-30 | 比亚迪股份有限公司 | Gear oil composition for automobile |
| CN101993763B (en) * | 2009-08-26 | 2013-05-08 | 比亚迪股份有限公司 | Gear oil composition for automobile |
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| CN102191117B (en) * | 2010-03-10 | 2013-04-24 | 中国石油天然气股份有限公司 | Tractor five-purpose lubricating oil composition |
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| CN102766507B (en) * | 2011-05-06 | 2014-08-06 | 中国石油天然气股份有限公司 | Lubricant composition for double-clutch gearbox |
| CN102766507A (en) * | 2011-05-06 | 2012-11-07 | 中国石油天然气股份有限公司 | Lubricant composition for double-clutch gearbox |
| CN102277226A (en) * | 2011-07-22 | 2011-12-14 | 江苏龙蟠石化有限公司 | Hydrodynamic drive lubricating oil composite for engineering plant |
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| CN104017635A (en) * | 2013-02-28 | 2014-09-03 | 美蓓亚株式会社 | Resin gear device with resin lubricating grease composition |
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| CN103484224B (en) * | 2013-10-15 | 2016-08-24 | 中国石油化工股份有限公司 | A kind of gear oil composition and preparation method thereof |
| CN107686764A (en) * | 2016-08-05 | 2018-02-13 | 姚文钊 | A kind of multifunctional industrial gear lubricating oil composition |
| CN107400553A (en) * | 2017-08-24 | 2017-11-28 | 马鞍山中粮生物化学有限公司 | A kind of pressure-resistant gear box oil and preparation method thereof |
| CN116286146A (en) * | 2023-02-09 | 2023-06-23 | 中国科学院上海高等研究院 | Vehicle gear oil composite additive, preparation method and application thereof |
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| CN1058520C (en) | 2000-11-15 |
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