CN112480998A - Gearbox oil composition - Google Patents
Gearbox oil composition Download PDFInfo
- Publication number
- CN112480998A CN112480998A CN201910866023.3A CN201910866023A CN112480998A CN 112480998 A CN112480998 A CN 112480998A CN 201910866023 A CN201910866023 A CN 201910866023A CN 112480998 A CN112480998 A CN 112480998A
- Authority
- CN
- China
- Prior art keywords
- oil composition
- transmission oil
- transmission
- weight
- base oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 45
- 239000003921 oil Substances 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 48
- 239000002199 base oil Substances 0.000 claims abstract description 31
- 239000000654 additive Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- 239000011575 calcium Substances 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- 229920013639 polyalphaolefin Polymers 0.000 claims description 15
- 239000003607 modifier Substances 0.000 claims description 8
- 101150092791 PAO4 gene Proteins 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- GJJSDZSDOYNJSW-UHFFFAOYSA-N lanthanum(3+);borate Chemical compound [La+3].[O-]B([O-])[O-] GJJSDZSDOYNJSW-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 2
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/042—Mixtures of base-materials and additives the additives being compounds of unknown or incompletely defined constitution only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic fractions used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
Abstract
The invention discloses a transmission oil composition, which comprises base oil and a multifunctional composite additive, wherein the multifunctional composite additive comprises the following components in percentage by weight: 4.9-5.2% of calcium, 1.4-1.55% of phosphorus and 0.33-0.45% of nitrogen. The transmission oil composition provided by the invention has extremely excellent low-temperature starting performance; the raw materials are reasonable in compatibility, the preparation method is simple, the application range is wide, and the raw materials are easy to obtain. The performance of the transmission oil composition of the invention obviously exceeds that of similar products at home and abroad, and the transmission oil composition is suitable for power gear shifting transmission systems and hydraulic systems of industrial equipment, engineering mechanical equipment and the like in various extremely cold regions.
Description
Technical Field
The invention relates to a transmission oil composition, in particular to a composition for transmission lubrication of an engineering mechanical power gear shifting transmission in an extremely cold region.
Background
In extremely cold regions, the power gear shifting gearbox of the engineering machinery can meet the requirement of frequent start and stop of equipment in an extremely low temperature state (about 50 ℃), can automatically increase torque at low speed and improve the starting performance of a vehicle. Meanwhile, the gearbox can freely change torque in the vehicle starting stage and the stable running stage, and the output power of the engine can be fully utilized.
Because of the characteristics of the engineering machinery power gear shifting gearbox in extremely cold regions, the current domestic hydraulic transmission oil products have insufficient low-temperature performance and lack of additives for improving friction characteristics in oil formulations, and when the oil products are used on low-temperature and heavy-load engineering machinery equipment, the phenomena of difficulty in starting and slipping of friction plates can occur, so that the equipment cannot run, and the friction plates and other transmission devices are seriously damaged.
With the development of industries such as engineering construction and mining in extremely cold regions (in arctic circles) in recent years, the demand for special engineering machinery in the extremely cold regions is large, so that the demand for gearbox oil with effective low-temperature starting performance and good friction performance is gradually increased, and the normal operation of the engineering machinery in the extremely cold environment can be met.
Disclosure of Invention
The inventor of the invention surprisingly finds that the multifunctional composite additive is added into the base oil, and the prepared oil has excellent abrasion resistance and rust resistance, and also has outstanding friction performance, so that the friction plate can be effectively prevented from slipping, and the service life of a machine part can be prolonged. Accordingly, the present invention provides, in a first aspect, a transmission oil composition comprising: base oil and multifunctional complex additives; the multifunctional composite additive comprises the following components in percentage by weight: 4.9-5.2% of calcium, 1.4-1.55% of phosphorus and 0.33-0.45% of nitrogen.
In the transmission oil composition provided by the invention, the weight percentage of the multifunctional compound additive is preferably at least 5%, and more preferably 6.5-7.0%.
Furthermore, the main effective components of the multifunctional composite additive are calcium, phosphorus and nitrogen.
In the multifunctional additive complex of the present invention, calcium, phosphorus and nitrogen can be provided by element sources known in the art.
In some embodiments of the present invention, the physical properties of the multifunctional complex additive are as follows: density 1030kg/m at 15 DEG C3Viscosity at 100 ℃ of 18mm2/s。
In some embodiments of the invention, the multifunctional additive package is H8888Z from Yafuton.
In the transmission oil composition provided by the invention, the base oil preferably has a kinematic viscosity of 3.3-3.8 mm at 40 DEG C2(ii) a mixed base oil per second.
In some embodiments of the invention, the base oil is comprised of a naphthenic oil and a PAO polyalphaolefin base oil, wherein the naphthenic oil is preferably NS3 manufactured by ninos corporation; the PAO polyalphaolefin base oil is preferably PAO4 manufactured by Mobil corporation. Further, the weight ratio of the naphthenic oil to the PAO poly-alpha-olefin base oil in the base oil is (65-75): 25-35.
In the transmission oil compositions provided herein, the base oil is typically present in an amount of 65 to 80 weight percent, and in some embodiments 70 to 75 weight percent.
In order to further improve the viscosity index, the transmission oil composition further comprises a viscosity index improver. In particular, it has been found that when a modified PMA viscosity index improver is used, it is also better able to reduce the low temperature kinematic viscosity of the oil. And surprisingly, the improved PMA viscosity index improver and the multifunctional composite additive are used together, so that the smooth starting of the gearbox in a low-temperature environment of about-50 ℃ can be met, and the working condition in an extremely cold environment can be met.
Preferably, the improved PMA viscosity index improver is VX7-310 produced by winning companies.
In the transmission oil composition provided by the invention, the weight percentage content of the improved PMA viscosity index improver is preferably at least 18%, and more preferably 20-24%.
Further, the transmission oil composition provided by the invention also contains a friction modifier, and particularly preferably nanometer lanthanum borate. Researches show that the friction modifier is used for blending lubricating oil, and the friction performance of the product can be better improved.
In the transmission oil composition provided by the invention, the weight percentage of the friction modifier is preferably at least 0.1%, and more preferably 0.1-0.15%.
In some embodiments of the invention, the nano lanthanum borate is produced by Qingdao Liyu oil additives, Inc.
As a preferable scheme of the invention, the transmission oil composition consists of the following components in percentage by weight:
wherein, the multifunctional composite additive is more preferably H8888Z produced by Yafuton company;
the improved PMA viscosity index improver is more preferably VX7-310 produced by winning companies;
the friction modifier is more preferably nano lanthanum borate (manufactured by Qingdao Liyu oil additives Co., Ltd.);
the mixed base oil comprises naphthenic base oil NS3 (produced by Nintensi corporation) and PAO poly-alpha olefin base oil PAO4 (produced by Mobil corporation) according to the weight ratio of (65-75): (25-35).
As a more preferable aspect of the present invention, the transmission oil composition is composed of the following components in percentage by weight:
the mixed base oil consists of NS3 and PAO4 in a weight ratio of (65-75) to (25-35).
The invention also provides a transmission containing the transmission oil composition.
The invention also provides a preparation method of the transmission oil composition, which can adopt a conventional lubricating oil blending method, for example, the transmission oil composition is prepared by adding the components into a blending container according to the proportion and stirring for 2-3 hours at 50-55 ℃.
Compared with the prior art, the transmission oil composition provided by the invention has extremely excellent low-temperature starting performance. The product of the invention has reasonable raw material compatibility, simple preparation method, wide application range and easily obtained raw materials.
The performance of the transmission oil composition of the invention obviously exceeds that of similar products at home and abroad, and the transmission oil composition is suitable for power gear shifting transmission systems and hydraulic systems of industrial equipment, engineering mechanical equipment and the like in various extremely cold regions.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.
Unless otherwise specified, the multifunctional additive package H8888Z, hereinafter used, was manufactured by Yafuton corporation; the viscosity index improver VX7-310 is produced by winning and creating companies; the friction modifier nano lanthanum borate is produced by Qingdao Liyu oil additive Co.Ltd; the base oil NS3 was produced by Nines corporation, and the base oil PAO4 was produced by Mobil corporation.
The detection method of the oxidation resistance is SH/T0103; the method for detecting the pour point is GB/T3535.
Examples
Examples 1-3 of transmission oil compositions were formulated according to the following table 1 and the results of performance testing are shown in table 2. The preparation process comprises the following steps: the components are added into a blending container according to the mixture ratio and stirred for 2 to 3 hours at the temperature of 55 ℃.
TABLE 1
Note: the mixture ratio of NS3 and PAO4 is adjusted to make the mixed base oil reach the required kinematic viscosity.
TABLE 2
| Example 1 | Example 2 | Example 3 | |
| Viscosity (40 ℃ C.), mm2/s | 31.1 | 32.3 | 30.8 |
| Viscosity index | 308 | 312 | 301 |
| Is resistant to oxidationChemical property (rotating oxygen bomb) | 210 | 218 | 206 |
| Pour point | -60 | -57 | -60 |
Wherein, the detection method of the oxidation resistance is SH/T0103; the method for detecting the pour point is GB/T3535.
The results in table 2 show that the transmission oil composition can be effectively started under the extremely cold working condition of the arctic circle, the power transmission efficiency is improved, higher viscosity can be kept under the high-temperature condition, and the lubrication protection of equipment is facilitated.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A transmission oil composition comprising a base oil and a multifunctional complex additive; the multifunctional composite additive comprises the following components in percentage by weight: 4.9-5.2% of calcium, 1.4-1.55% of phosphorus and 0.33-0.45% of nitrogen.
2. The transmission oil composition of claim 1, wherein the multifunctional additive package has a density of 1030kg/m at 15 ℃3Viscosity at 100 ℃ of 18mm2/s；
Preferably, the multifunctional composite additive is jafton H8888Z.
3. The transmission oil composition according to claim 1 or 2, wherein the multifunctional complex additive is present in the transmission oil composition in an amount of at least 5% by weight, preferably 6.5 to 7.0% by weight.
4. The transmission oil composition according to any one of claims 1 to 3, wherein the base oil has a kinematic viscosity at 40 ℃ of 3.3 to 3.8mm2A mixed base oil/s; and/or the presence of a gas in the gas,
the base oil consists of naphthenic base oil and PAO poly-alpha-olefin base oil; wherein the naphthenic base oil is preferably NS3, and the PAO polyalphaolefin base oil is preferably PAO 4; further preferably, the weight ratio of the naphthenic base oil to the PAO polyalphaolefin base oil in the base oil is (65-75): 25-35.
5. A transmission oil composition according to any one of claims 1 to 4, wherein the base oil is present in the transmission oil composition in an amount of 65 to 80% by weight, preferably 70 to 75% by weight.
6. The transmission oil composition according to any one of claims 1 to 5, further comprising a viscosity index improver;
preferably, the viscosity index improver is a modified PMA viscosity index improver, more preferably a winning company VX 7-310; and/or the viscosity index improver accounts for at least 18 percent by weight of the transmission oil composition, and preferably 20-24 percent by weight of the transmission oil composition.
7. The transmission oil composition according to any one of claims 1 to 6, further comprising a friction modifier;
preferably, the friction modifier is nano lanthanum borate; and/or the friction modifier is at least 0.1 wt% of the transmission oil composition, and more preferably 0.1-0.15 wt%.
8. The transmission oil composition according to any one of claims 1 to 7, characterized by consisting of the following components in weight percent:
preferably, the transmission oil composition consists of the following components in percentage by weight:
the mixed base oil consists of NS3 and PAO4 in a weight ratio of (65-75) to (25-35).
9. A transmission comprising a transmission oil composition as claimed in any one of claims 1 to 8.
10. The method for preparing the transmission oil composition according to any one of claims 1 to 8, wherein the method comprises adding the components in a blending container according to the ratio, and stirring for 2 to 3 hours at a temperature of 50 to 55 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910866023.3A CN112480998A (en) | 2019-09-12 | 2019-09-12 | Gearbox oil composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910866023.3A CN112480998A (en) | 2019-09-12 | 2019-09-12 | Gearbox oil composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112480998A true CN112480998A (en) | 2021-03-12 |
Family
ID=74920882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910866023.3A Pending CN112480998A (en) | 2019-09-12 | 2019-09-12 | Gearbox oil composition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112480998A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250579A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | ATF-III automatic transmission fluid composition |
| CN106085561A (en) * | 2016-06-07 | 2016-11-09 | 江苏金迪润滑油有限公司 | A kind of low temperature resistant high wearproof lubricant of mineral oil base |
| CN107841368A (en) * | 2016-09-19 | 2018-03-27 | 中国石油化工股份有限公司 | A kind of Powershift transmission fluid composition |
-
2019
- 2019-09-12 CN CN201910866023.3A patent/CN112480998A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250579A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | ATF-III automatic transmission fluid composition |
| CN106085561A (en) * | 2016-06-07 | 2016-11-09 | 江苏金迪润滑油有限公司 | A kind of low temperature resistant high wearproof lubricant of mineral oil base |
| CN107841368A (en) * | 2016-09-19 | 2018-03-27 | 中国石油化工股份有限公司 | A kind of Powershift transmission fluid composition |
Non-Patent Citations (3)
| Title |
|---|
| 北京联合润华科技公司: "《车用润滑油宝典》", 31 March 2003, 中国石化出版社, pages: 92 * |
| 程西云等: "纳米硼酸镧添加剂的摩擦学性能研究", 《机械科学与技术》, vol. 20, no. 03, 30 May 2001 (2001-05-30), pages 438 - 439 * |
| 董浚修: "《润滑原理及润滑油 （第二版）》", 30 September 1998, 中国石化出版社, pages: 155 - 157 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102031185B (en) | Anti micro-pitting industrial gear oil composition | |
| CN103497818A (en) | Lubricating oil compound and preparation method thereof | |
| CN111019743A (en) | Coal-based total-synthesis low-temperature hydraulic oil and preparation method thereof | |
| CN105670755B (en) | Manual transmission oil | |
| JP6284865B2 (en) | Lubricating oil composition for transmission | |
| CN102827677A (en) | Ashless lubricating grease composition and preparation method thereof | |
| CN113930270A (en) | Lubricating oil composition for improving low-temperature fluidity and preparation method and application thereof | |
| CN103642563B (en) | A kind of energy-saving complete synthesis automatic transmission transmission fluid and synthetic method thereof | |
| JP2728736B2 (en) | Urea grease composition | |
| CN104388164A (en) | Gear lubricating oil containing boron and nitrogen compounds | |
| CN112480998A (en) | Gearbox oil composition | |
| JPS58103594A (en) | Sulfur-containing lubricating oil employed in freon gas atmosphere | |
| CN104388163A (en) | Automobile gear lubricating oil containing borate | |
| CN104312679A (en) | Low-noise lubricating grease and preparation method thereof | |
| CN104250579B (en) | A kind of ATF-III automatic drive liquid composition | |
| CN107841368B (en) | Oil composition for power gear shifting transmission | |
| CN111621355B (en) | Lubricant composition for gear oil | |
| CN109504515B (en) | Energy-saving environment-friendly agricultural machine oil and preparation method thereof | |
| CN106929130A (en) | A kind of engine oil composition, engine oil and preparation method thereof | |
| CN112143552A (en) | Oil-gas lubricating oil composition and preparation method thereof | |
| CN112646649A (en) | Low-temperature-resistant long-life hydraulic transmission oil composition and preparation method and application thereof | |
| CN113930275A (en) | Lubricating oil for oil-cooled motor hybrid power reduction gearbox and application thereof | |
| CN111635808B (en) | Gear oil and preparation method thereof | |
| CN103642575B (en) | Lubricant and preparation method thereof | |
| CN105441164A (en) | Chain lubricating oil and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210312 |
|
| RJ01 | Rejection of invention patent application after publication |