CN112011386A - Antirust and antiwear additive, and preparation method and application thereof - Google Patents
Antirust and antiwear additive, and preparation method and application thereof Download PDFInfo
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- CN112011386A CN112011386A CN202010994780.1A CN202010994780A CN112011386A CN 112011386 A CN112011386 A CN 112011386A CN 202010994780 A CN202010994780 A CN 202010994780A CN 112011386 A CN112011386 A CN 112011386A
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- Prior art keywords
- antirust
- additive
- rust
- antiwear
- maleic anhydride
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- 239000007866 anti-wear additive Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- -1 fatty acid ester Chemical class 0.000 claims abstract description 17
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 14
- 229930195729 fatty acid Natural products 0.000 claims abstract description 14
- 239000000194 fatty acid Substances 0.000 claims abstract description 14
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003063 flame retardant Substances 0.000 claims abstract description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 9
- MLFIYYDKLNZLAO-UHFFFAOYSA-N 2-aminoethane-1,1-diol Chemical compound NCC(O)O MLFIYYDKLNZLAO-UHFFFAOYSA-N 0.000 claims abstract description 7
- WVRNUXJQQFPNMN-VAWYXSNFSA-N 3-[(e)-dodec-1-enyl]oxolane-2,5-dione Chemical compound CCCCCCCCCC\C=C\C1CC(=O)OC1=O WVRNUXJQQFPNMN-VAWYXSNFSA-N 0.000 claims abstract description 7
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 abstract description 13
- 230000000996 additive effect Effects 0.000 abstract description 11
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 10
- 239000013556 antirust agent Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- FMNZBNCPTJEVDS-KVVVOXFISA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;(z)-octadec-9-enoic acid Chemical compound CCC(CO)(CO)CO.CCCCCCCC\C=C/CCCCCCCC(O)=O FMNZBNCPTJEVDS-KVVVOXFISA-N 0.000 description 5
- 235000019484 Rapeseed oil Nutrition 0.000 description 5
- 239000002199 base oil Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000003042 antagnostic effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 235000019486 Sunflower oil Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
- C10M137/105—Thio derivatives not containing metal
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/6515—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having three nitrogen atoms as the only ring hetero atoms
- C07F9/6518—Five-membered rings
- C07F9/65188—Five-membered rings condensed with carbocyclic rings or carbocyclic ring systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Lubricants (AREA)
Abstract
The invention provides an antirust and antiwear additive, a preparation method and application thereof, and relates to the technical field of lubricating materials. Weighing a proper amount of O, O ' -dioctyl dithiophosphate and maleic anhydride, adding the O, O ' -dioctyl dithiophosphate and maleic anhydride into a single-neck flask, and stirring for 6-10 hours at 90-110 ℃ to obtain a product S- (tetrahydro-2, 5-dioxyfuran-3-yl) -O, O ' -dioctyl dithiophosphate; (b) appropriate amounts of S- (tetrahydro-2, 5-dioxafuran-3-yl) -O, O' -dioctyl dithiophosphate, N- (1-methylene-4 (or 5) methylbenzotriazole) -N, N-dihydroxyethylamine and dodecenyl succinic anhydride are weighed and added into a flask, and the mixture is stirred and reacted for 1 to 2 hours at the temperature of between 80 and 100 ℃. The antirust antiwear additive is added into the fatty acid ester type flame-retardant hydraulic oil, and the addition amount is 0.1-0.5 wt.%. The rust-proof and wear-resistant additive provided by the invention has good wear-resistant, friction-reducing and rust-proof beneficial effects.
Description
Technical Field
The invention relates to the technical field of lubricating materials, in particular to an antirust and antiwear additive, and a preparation method and application thereof.
Background
The hydraulic oil is used as an important component of a hydraulic system, plays roles in energy transfer, system lubrication, corrosion prevention, rust prevention, cooling and the like in the hydraulic system, and is also one of important oil products with the largest industrial lubricating oil consumption. The fatty acid ester type flame-retardant hydraulic oil is safe, low-toxicity and biodegradable green environment-friendly hydraulic oil and comprises two types: one type is natural esters based on glycerol, such as rapeseed oil, olive oil, sunflower oil, soybean oil, etc.; the second type is a synthetic ester based on animal and vegetable fatty acids, mainly polyol esters, such as trimethylolpropane oleate, pentaerythritol oleate, etc. The fatty acid ester type flame-retardant hydraulic oil has excellent lubricating property and anti-shearing stability, high ignition point and good compatibility with hydraulic system materials, so the fatty acid ester type flame-retardant hydraulic oil is widely applied to the industries of aviation, electric power, ferrous metallurgy and the like.
With the development of mechanical equipment hydraulic systems towards high pressure, high precision, miniaturization and long oil change period, the loading pressure, the rotating speed of a pump/motor and the working temperature of the hydraulic system are greatly improved, and new challenges are provided for the wear resistance of hydraulic oil. Under higher pressure and temperature, the lubricating requirement of hydraulic equipment is difficult to meet by only depending on base oil, and a chemical reaction film with stronger performance is formed on the surface of a metal part by virtue of an anti-wear additive to realize good lubrication of the hydraulic equipment under the boundary lubricating condition. In addition, because the fatty acid ester type flame-retardant hydraulic oil has strong molecular polarity, in order to make the additive molecules more easily adsorbed on the metal surface, a high-activity (extreme pressure) antiwear agent is usually required to be added to enhance the antiwear performance, and the high-activity antiwear agent easily causes the corrosion and other adverse effects of hydraulic equipment parts, so that (extreme pressure) antiwear agents and antirust agents are added to the formulations of the fatty acid ester type flame-retardant hydraulic oil in patents CN101812349B, CN101812352B, CN101831346B, CN104263480B, CN104403727B and the like. Both the antiwear agent and the antirust agent are high-polarity additives, and need to reach a certain adsorption amount on the metal surface to realize the self functional action, and the antiwear agent and the antirust agent are easy to compete and adsorb on the metal surface, so that adverse effects are generated between the antiwear agent and the antirust agent, the performance index of a product can be improved only by increasing the dosage, and the cost is increased. In the prior art, the fatty acid ester type flame-retardant hydraulic oil has large dosage of an antiwear agent and an antirust agent, unobvious antiwear performance and lacks of a targeted antirust antiwear additive.
Disclosure of Invention
The invention provides an antirust and antiwear additive, a preparation method and application thereof, wherein the additive has the functions of antiwear, antifriction and antirust, prevents water, oxygen and metal surfaces from rusting, is particularly suitable for fatty acid ester type flame-retardant hydraulic oil, and solves the technical problem of large dosage caused by mutual antagonism of an antiwear agent and an antirust agent in fatty acid ester type flame-retardant hydraulic oil in the prior art.
The invention is realized by the following steps: the chemical structural formula of the antirust antiwear additive is shown as a formula (1).
A preparation method of an antirust and antiwear additive comprises the following steps:
(1) weighing appropriate amounts of O, O '-dioctyl dithiophosphate and maleic anhydride (adding into a single-neck flask, stirring for 6-10 hours at 90-110 ℃ to obtain a product S- (tetrahydro-2, 5-dioxyfuran-3-yl) -O, O' -dioctyl dithiophosphate;
(2) weighing a proper amount of the product obtained in the step (1), N- (1-methylene-4 (or 5) methyl benzotriazole) -N, N-dihydroxyethylamine and dodecenyl succinic anhydride, adding into a flask, and stirring and reacting for 1-2 hours at 80-100 ℃.
It is further preferred that in step (1), the molar ratio of O, O' -dioctyldithiophosphate to maleic anhydride is 1: 1.
Further preferably, in the step (2), the molar ratio of S- (tetrahydro-2, 5-dioxafuran-3 yl) -O, O' -dioctyl dithiophosphate, N- (1-methylene-4 (or 5) methylbenzotriazole) -N, N-dihydroxyethylamine and dodecenyl succinic anhydride is 1:1: 1.
The application of the antirust and antiwear additive, wherein when the antirust and antiwear additive is applied to the fatty acid ester type flame-retardant hydraulic oil, the addition amount is 0.1-0.5 wt.%.
The invention has the beneficial effects that: the antirust antiwear additive provided by the invention has two functional groups of antirust and antiwear, and can generate an effect by adsorbing on the surface of metal, so that the antagonistic effect caused by competitive adsorption of an antirust agent and an antiwear agent is avoided. The antirust antiwear additive has good solubility in fatty acid ester base oil, and has the performances of wear resistance, friction reduction and rust prevention, and meanwhile, the antirust antiwear additive has the advantages of simple preparation process, high product yield, good atom economy and no byproduct generation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
17.73g (0.05mol) of O, O '-dioctyl dithiophosphate and 4.9g (0.05mol) of maleic anhydride are weighed into a 100ml single-neck flask, stirred and reacted for 10h at 90 ℃ to obtain S- (tetrahydro-2, 5-dioxyfuran-3-yl) -O, O' -dioctyl dithiophosphate, then 13.32g (0.05mol) of dodecenyl succinic anhydride and 12.50g (0.05mol) of N- (1-methylene-4 (or 5) methylbenzotriazole) -N, N-dihydroxyethylamine are respectively added, and stirred and reacted for 2h at 80 ℃ to obtain the additive of the invention.
Example 2
35.46g (0.1mol) of O, O '-dioctyldithiophosphate and 9.8g (0.1mol) of maleic anhydride were weighed out and added to a 100ml single-neck flask, and stirred at 110 ℃ for 6 hours to give S- (tetrahydro-2, 5-dioxafuran-3 yl) -O, O' -dioctyldithiophosphate, followed by 26.64g (0.1mol) of dodecenylsuccinic anhydride and 25.00g (0.1mol) of N- (1-methylene-4 (or 5) methylbenzotriazole) -N, N-dihydroxyethylamine, and stirred at 100 ℃ for 1 hour to give the additive of the present invention.
To better illustrate the use effect of the additive of the present invention, the additive prepared in example 1 of the present invention and Basf 349 (amine phosphate salt) were added to rapeseed oil and trimethylolpropane oleate, respectively, and dissolved with sufficient stirring, and depending on the addition amount, the samples to which the additive of the present invention was added were taken as example 3 and example 4, respectively, the samples to which no additive was added were taken as comparative example 1 and comparative example 2, and the samples to which Basf 349 was added were taken as comparative example 3 and comparative example 4, and the specific addition amounts are shown in table 1.
Table 1 compositions of examples 3 to 4 and comparative examples 1 to 4
| Item | Base oil | Additives of the invention | Basf349 |
| Example 3 | Rapeseed oil | 0.1wt.％ | Is free of |
| Example 4 | Trimethylolpropane oleate | 0.5wt.％ | Is free of |
| Comparative example 1 | Rapeseed oil | Is free of | Is free of |
| Comparative example 2 | Trimethylolpropane oleate | Is free of | Is free of |
| Comparative example 3 | Rapeseed oil | Is free of | 0.1wt.％ |
| Comparative example 4 | Trimethylolpropane oleate | Is free of | 0.5wt.％ |
The samples of example 3, example 4 and comparative examples 1 to 4 were evaluated for lubricating properties and rust properties by the GB/T11143A method. The test results are shown in Table 2.
Table 2 evaluation results of lubricating and rust inhibitive performance of examples 3 to 4 and comparative examples 1 to 4
As can be seen from Table 2, compared with the blank sample and the sample added with Basf 349, the base oil added with the additive of the invention has smaller wear-scar diameter, lower friction coefficient and better antirust performance, which indicates that the additive prepared by the invention is an antirust and antiwear additive with excellent performance.
The invention has the beneficial effects that: the antirust antiwear additive provided by the invention has two functional groups of antirust and antiwear, and can generate an effect by adsorbing on the surface of metal, so that the antagonistic effect caused by competitive adsorption of an antirust agent and an antiwear agent is avoided. The antirust antiwear additive has good solubility in fatty acid ester base oil, and has the performances of wear resistance, friction reduction and rust prevention, and meanwhile, the antirust antiwear additive has the advantages of simple preparation process, high product yield, good atom economy and no byproduct generation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An antirust and antiwear additive is characterized in that the chemical structural formula of the antirust and antiwear additive is shown as a formula (1).
2. The method for preparing the rust-proof and anti-wear additive according to claim 1, comprising the steps of:
(1) weighing a proper amount of O, O ' -dioctyl dithiophosphate and maleic anhydride, adding the O, O ' -dioctyl dithiophosphate and maleic anhydride into a single-neck flask, and stirring for 6-10 hours at 90-110 ℃ to obtain a product S- (tetrahydro-2, 5-dioxyfuran-3-yl) -O, O ' -dioctyl dithiophosphate;
(2) weighing a proper amount of the product obtained in the step (1), N- (1-methylene-4 (or 5) methyl benzotriazole) -N, N-dihydroxyethylamine and dodecenyl succinic anhydride, adding into a flask, and stirring and reacting for 1-2 hours at 80-100 ℃.
3. The method according to claim 2, wherein in the step (1), the molar ratio of O, O' -dioctyldithiophosphate to maleic anhydride is 1: 1.
4. The process according to claim 2, wherein in the step (2), the molar ratio of S- (tetrahydro-2, 5-dioxafuran-3-yl) -O, O' -dioctyldithiophosphate, N- (1-methylene-4 (or 5) methylbenzotriazole) -N, N-dihydroxyethylamine and dodecenylsuccinic anhydride is 1:1: 1.
5. The use of the rust-inhibiting anti-wear additive according to claim 1, wherein the rust-inhibiting anti-wear additive is added in an amount of 0.1 wt.% to 0.5 wt.% when the rust-inhibiting anti-wear additive is applied to the fatty acid ester type flame-retardant hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994780.1A CN112011386A (en) | 2020-09-21 | 2020-09-21 | Antirust and antiwear additive, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994780.1A CN112011386A (en) | 2020-09-21 | 2020-09-21 | Antirust and antiwear additive, and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN112011386A true CN112011386A (en) | 2020-12-01 |
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| CN202010994780.1A Pending CN112011386A (en) | 2020-09-21 | 2020-09-21 | Antirust and antiwear additive, and preparation method and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084517A (en) * | 1992-09-23 | 1994-03-30 | 中国科学院兰州化学物理研究所 | S-(1-benzotriazolyl-methyl) O, O '-dialkyl dithiophosphate |
| CA3053515A1 (en) * | 2017-02-20 | 2018-08-23 | Dover Chemical Corporation | Polymeric poly-phosphorus lubricant additives for metal working |
| CN108884407A (en) * | 2016-03-31 | 2018-11-23 | 出光兴产株式会社 | Lubricating oil composition and precision speed reducer using same |
| CN109679710A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Hydraulic fluid compositions and preparation method thereof |
| CN109679721A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Industrial lubrication fluid composition and preparation method thereof |
-
2020
- 2020-09-21 CN CN202010994780.1A patent/CN112011386A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084517A (en) * | 1992-09-23 | 1994-03-30 | 中国科学院兰州化学物理研究所 | S-(1-benzotriazolyl-methyl) O, O '-dialkyl dithiophosphate |
| CN108884407A (en) * | 2016-03-31 | 2018-11-23 | 出光兴产株式会社 | Lubricating oil composition and precision speed reducer using same |
| CA3053515A1 (en) * | 2017-02-20 | 2018-08-23 | Dover Chemical Corporation | Polymeric poly-phosphorus lubricant additives for metal working |
| CN109679710A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Hydraulic fluid compositions and preparation method thereof |
| CN109679721A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Industrial lubrication fluid composition and preparation method thereof |
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