CN103343035A - Hydraulic oil composition and method for preparing same - Google Patents
Hydraulic oil composition and method for preparing same Download PDFInfo
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- CN103343035A CN103343035A CN2013103172908A CN201310317290A CN103343035A CN 103343035 A CN103343035 A CN 103343035A CN 2013103172908 A CN2013103172908 A CN 2013103172908A CN 201310317290 A CN201310317290 A CN 201310317290A CN 103343035 A CN103343035 A CN 103343035A
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Abstract
The invention provides a hydraulic oil composition. The hydraulic oil composition comprises the following components in parts by weight: 60-85 parts of a base oil, 5-30 parts of a viscosity index improver, 1-10 parts of an oiliness agent, 0.5-5 parts of an extreme-pressure antiwear agent, 0.1-0.5 part of an antioxidant and 0.1-3 parts of a corrosion inhibitor. The hydraulic oil composition is prepared by blending the base oil, the viscosity index improver, the oiliness agent, the extreme-pressure antiwear agent, the antioxidant and the corrosion inhibitor, thus the viscosity, the wear resistance, the oxidation resistance and the corrosion resistance needed by a hydraulic system of the hydraulic oil composition can be guaranteed. In addition, the hydraulic oil composition has extremely good annealing detergency, thus even if the hydraulic system leaks the hydraulic oil, nearly no oil stain can be left on the surface of a rolled product, the generation of annealing oil spots can be avoided or reduced, and the service life of the rolling oil can be prolonged.
Description
Technical field
The present invention relates to the hydraulic efficiency oil technical field, relate in particular to a kind of hydraulic fluid compositions and preparation method thereof.
Background technology
Hydraulic efficiency oil is the pressure medium that utilizes the hydraulic efficiency system use of liquid pressure energy, in hydraulic efficiency system, play effects such as transmission ofenergy, system are lubricated, anticorrosion, antirust, cooling, because the working pressure of vane pump, ram pump constantly rises and to the wearing and tearing of friction pair, for hydraulic efficiency oil various demands have been proposed, especially the hydraulic efficiency system to milling train has requirements at the higher level with oil in aluminium foil or copper strips are rolling, as: pollution-free to ROLLING OIL, can prolong the life cycle of ROLLING OIL; Can reduce the product rejection rate that causes because of workpiece dyeing; Has wear resistance preferably; Have excellent antioxygen, corrosion-resistant energy, not corroding metal; Modest viscosity can overcome the leakage of pump and hydraulic efficiency system, and simultaneously higher viscosity index makes the oil product can excess dilution when high temperature.
It still is not enough that hydraulic efficiency oil satisfies above-mentioned requirement, and common hydraulic efficiency oil can leak in the ROLLING OIL, thereby pollutes ROLLING OIL, and annealing back oil stain can remain in product surface, forms oil mark, and then influences quality product.Therefore, providing a kind of hydraulic efficiency oil with excellent annealing cleanness is the important measures that guarantee product quality.
The existing multiple annealing cleanness hydraulic efficiency oil product that has, as import MOBIL H15 hydraulic efficiency oil and import ESSO 32# hydraulic efficiency oil, but carbon residue and ash content index are higher in its concrete application, and annealing cleanness is poor, and its application is affected.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of hydraulic fluid compositions and preparation method thereof, hydraulic fluid compositions provided by the invention has fabulous annealing cleanness and viscosity, resistance to wears, anti-oxidant, corrosion resistance is unaffected.
The invention provides a kind of hydraulic fluid compositions, comprising:
Preferably, described base oil is mineral oil.
Preferably, described mineral oil is the low sulfur and low aromatics mineral oil of the full hydrogenation deep refining of high pressure.
Preferably, described viscosity index improver is the polyisobutene base polymer.
Preferably, described oiliness improver is selected from one or more in lipid acid, fatty acid ester, organophosphate and the phosphorous acid ester.
Preferably, described extreme pressure anti-wear additives is selected from one or more in phosphoric acid ester and the phosphorous acid ester.
Preferably, described oxidation inhibitor is selected from one or more in phenolic compound or the aminated compounds.
Preferably, described corrosion inhibitor is selected from one or more in lipid acid, derivative of fatty acid and the phosphate compounds.
The present invention also provides a kind of preparation method of hydraulic fluid compositions, may further comprise the steps:
Viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor, corrosion inhibitor and base oil mixing, heating, stirring are obtained hydraulic fluid compositions.
Preferably, described Heating temperature is 50 ℃～80 ℃.
Compared with prior art, the invention provides a kind of hydraulic fluid compositions, comprising: base oil 60～85 mass parts; Viscosity index improver 5～30 mass parts; Oiliness improver 1～10 mass parts; Extreme pressure anti-wear additives 0.5～5 mass parts; Oxidation inhibitor 0.1～0.5 mass parts; Corrosion inhibitor 0.1～3 mass parts.Hydraulic fluid compositions provided by the invention is to be formed by base oil, viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor and corrosion inhibitor allotment, can guarantee the required viscosity of hydraulic efficiency system, resistance to wear, anti-oxidant and corrosion resistance, has fabulous annealing cleanness again, even make hydraulic efficiency system leak, the residual spot hardly on the surface of milling material, can avoid or reduce the generation of annealing oil mark, prolong the work-ing life of ROLLING OIL.Experimental result shows that the kinematic viscosity that hydraulic fluid compositions provided by the invention is 40 ℃ is 31.79mm
2/ s, 100 ℃ kinematic viscosity is 8.083mm
2/ s, viscosity index is 245, and acid number is 0.01mgKOH/g, and 100 ℃, 1h corrodibility is 1b, and moisture determination is vestige, no carbon residue, ash content is 0.001%, does not have mechanical impurity, 60 ℃, the 70h volume change is 0.44%.
Description of drawings
The carbon residue test result figure of the hydraulic efficiency oil that Fig. 1 prepares for the embodiment of the invention and comparative example.
Embodiment
The invention provides a kind of hydraulic fluid compositions, comprising:
In the present invention, described base oil is preferably mineral oil, can be the oil of paraffinic oils or naphthenic oil, routine paraffin wax or other this compounds, they obtain by refining crude stream fluid, more preferably pass through the low sulfur and low aromatics mineral oil of the full hydrogenation deep refining of high pressure, include but not limited in II class, III class and the IV class base oil one or more.Described II class base oil is preferably selected from a kind of among 60N, 70N and the 100N; Described III class base oil is preferably selected from a kind of among 70N and the 100N; Described IV class base oil is preferably selected from a kind of among PAO2, PAO4, the PAO5.In the present invention, described viscosity index improver is preferably ethylene-propylene copolymer, polyisobutene, styrene-butadiene copolymer, polymethacrylate, most preferably is the polyisobutene base polymer; The number-average molecular weight of described polyisobutene polymkeric substance is preferably 350～100000 dalton, more preferably 350～3500 dalton.
In the present invention, described oiliness improver is preferably selected from one or more in lipid acid, fatty acid ester, organophosphate and the phosphorous acid ester, more preferably be selected from fatty acid ester, organophosphate and the phosphorous acid ester one or more, include but not limited to palmitinic acid, oleic acid, oleic acid three hydroxyl esters, animal-plant oil, butyl stearate, n butyl oleate, acid lauryl phosphate and acid phosphoric acid oleoyl ester.
In the present invention, described extreme pressure anti-wear additives is preferably selected from one or more in phosphoric acid ester and the phosphorous acid ester, includes but not limited to tritolyl phosphate, triphenylphosphate, triethyl phosphate, tributyl phosphate and di-n-butyl phosphite.
In the present invention, described oxidation inhibitor is selected from one or more in phenolic compound or the aminated compounds; Wherein, phenolic compound includes but not limited to 2,6 ditertiary butyl p cresol, 4,4-methylene-bis (2,6-di-t-butyl) phenol, 2,2-thiobis (4-methyl 6 tertiary butyls) phenol, 2,2-methylene-bis (4-methyl 6 tertiary butyls) phenol; Described aminated compounds includes but not limited to pentanoic and Ursol D.
In the present invention, described corrosion inhibitor is preferably selected from one or more in 124 Triazole and derivative, lipid acid, derivative of fatty acid and the phosphate compounds, more preferably is selected from 124 Triazole and derivative thereof, the derivative of fatty acid one or more; Include but not limited to 124 Triazole and derivative thereof, alkenyl succinic acid, sorbitan monooleate, 2-aminoethyl 17 alkenyl imidazoline succinates, N-oleoyl sarcosine, 2-aminoethyl 17 alkenyl imidazolines, alkyl acid phosphoric acid ester 2-three aminoethyls 17 alkenyl imidazoline salt.
Hydraulic fluid compositions provided by the invention is to be formed by base oil, viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor and corrosion inhibitor allotment, can guarantee the required viscosity of hydraulic efficiency system, resistance to wear, anti-oxidant and corrosion resistance, has fabulous annealing cleanness again, even make hydraulic efficiency system leak, the residual spot hardly on the surface of milling material, can avoid or reduce the generation of annealing oil mark, prolong the work-ing life of ROLLING OIL.
The present invention also provides a kind of preparation method of hydraulic fluid compositions, may further comprise the steps:
Viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor, corrosion inhibitor and base oil mixing, heating, stirring are obtained hydraulic fluid compositions.
The present invention is preferred to add base oil in the compounding kettle earlier, adds viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor, corrosion inhibitor again, and the present invention is for reinforced mode and unrestricted.
In the present invention, the temperature of described heating is preferably 50 ℃～80 ℃, more preferably 55 ℃～75 ℃.The present invention is for described mixing, stirring and unrestricted, and mixing well known to those skilled in the art, stirring get final product.
In the present invention, described base oil is preferably mineral oil, can be the oil of paraffinic oils or naphthenic oil, routine paraffin wax or other this compounds, they obtain by refining crude stream fluid, more preferably pass through the low sulfur and low aromatics mineral oil of the full hydrogenation deep refining of high pressure, include but not limited in II class, III class and the IV class base oil one or more.Described II class base oil is preferably selected from a kind of among 60N, 70N and the 100N; Described III class base oil is preferably selected from a kind of among 70N and the 100N; Described IV class base oil is preferably selected from a kind of among PAO2, PAO4, the PAO5.
In the present invention, described viscosity index improver is preferably ethylene-propylene copolymer, polyisobutene, styrene-butadiene copolymer, polymethacrylate, most preferably is the polyisobutene base polymer; The number-average molecular weight of described polyisobutene polymkeric substance is preferably 350～100000 dalton, more preferably 350～3500 dalton.
In the present invention, described oiliness improver is preferably selected from one or more in lipid acid, fatty acid ester, organophosphate and the phosphorous acid ester, more preferably be selected from fatty acid ester, organophosphate and the phosphorous acid ester one or more, include but not limited to palmitinic acid, oleic acid, oleic acid three hydroxyl esters, animal-plant oil, butyl stearate, n butyl oleate, acid lauryl phosphate and acid phosphoric acid oleoyl ester.
In the present invention, described extreme pressure anti-wear additives is preferably selected from one or more in phosphoric acid ester and the phosphorous acid ester, includes but not limited to tritolyl phosphate, triphenylphosphate, triethyl phosphate, tributyl phosphate and di-n-butyl phosphite.
In the present invention, described oxidation inhibitor is selected from one or more in phenolic compound or the aminated compounds; Wherein, phenolic compound includes but not limited to 2,6 ditertiary butyl p cresol, 4,4-methylene-bis (2,6-di-t-butyl) phenol, 2,2-thiobis (4-methyl 6 tertiary butyls) phenol, 2,2-methylene-bis (4-methyl 6 tertiary butyls) phenol; Described aminated compounds includes but not limited to pentanoic and Ursol D; In the present invention, described corrosion inhibitor is preferably selected from one or more in 124 Triazole and derivative, lipid acid, derivative of fatty acid and the phosphate compounds, more preferably is selected from 124 Triazole and derivative thereof, the derivative of fatty acid one or more; Include but not limited to 124 Triazole and derivative thereof, alkenyl succinic acid, sorbitan monooleate, 2-aminoethyl 17 alkenyl imidazoline succinates, N-oleoyl sarcosine, 2-aminoethyl 17 alkenyl imidazolines, alkyl acid phosphoric acid ester 2-three aminoethyls 17 alkenyl imidazoline salt.
After preparing hydraulic fluid compositions, the present invention preferably carries out the hydraulic fluid compositions for preparing the mensuration of kinematic viscosity according to GB/T265, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, according to GB/T1690 carry out material adaptability, volume change is measured.
The present invention is preferred to be measured the carbon residue of the hydraulic fluid compositions for preparing in accordance with the following methods:
The hydraulic efficiency oil that the embodiment of the invention and comparative example are provided has carried out the residue test comparison, method is with reference to the measuring method (GB/T17144) of carbon residue, copper sheet is put into the test carbon residue in vitro, the oil sample that adds 2g, according to the testing method test of carbon residue, tested the back and observed tinsel and test tube situation.
In order to further specify the present invention, below in conjunction with embodiment hydraulic fluid compositions provided by the invention and preparation method thereof is described in detail.
Embodiment 1
70g poly alpha olefine synthetic oil PAO2 is added in the compounding kettle, add 10g polyisobutene (number-average molecular weight is 1300 dalton), 8g butyl stearate, 4g tritolyl phosphate, 0.4g pentanoic, 2g2-aminoethyl 17 alkenyl imidazoline succinates again, mix, be warming up to 50 ℃ and stir, obtain hydraulic fluid compositions.
The hydraulic fluid compositions that embodiment 1 is prepared carries out the mensuration of kinematic viscosity according to GB/T265, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, carry out material adaptability according to GB/T1690, volume change is measured, the results are shown in Table 1, the hydraulic fluid compositions performance measurement result that table 1 provides for the embodiment of the invention and comparative example.
85g II class base oil 60N is added in the compounding kettle, add 20g polyisobutene (number-average molecular weight is 600 dalton), 4g oleic acid, 1g di-n-butyl phosphite, 0.2g2.6-ditertbutylparacresol, 1g 124 Triazole again, mix, be warming up to 80 ℃ and stir, obtain hydraulic fluid compositions.
The hydraulic fluid compositions that embodiment 2 is prepared carries out the mensuration of kinematic viscosity according to GB/T265, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, carry out material adaptability according to GB/T1690, volume change is measured, the results are shown in Table 1, the hydraulic fluid compositions performance measurement result that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 1
Import ESSO32# oil is carried out the mensuration of kinematic viscosity according to GB/T265, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, carry out material adaptability according to GB/T1690, volume change is measured, the results are shown in Table 1, the hydraulic fluid compositions performance measurement result that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 2
The nothing that large ship new special oily development corporation, Ltd. in development area, Shijiazhuang produces is steeped oil carries out kinematic viscosity according to GB/T265 mensuration, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, carry out material adaptability according to GB/T1690, volume change is measured, the results are shown in Table 1, the hydraulic fluid compositions performance measurement result that table 1 provides for the embodiment of the invention and comparative example.
Comparative example 3
Import MOBIL H15 oil is carried out the mensuration of kinematic viscosity according to GB/T265, carry out the mensuration of viscosity index according to GB/T2541, carry out the mensuration of acid number according to GB/T7304, carry out the mensuration of corrosive nature according to GB/T5096, carry out the mensuration of moisture according to GB/T260, carry out the mensuration of carbon residue according to GB/T17144, carry out the mensuration of ash content according to GB/T508, carry out the mensuration of mechanical impurity according to GB/T511, carry out material adaptability according to GB/T1690, volume change is measured, the results are shown in Table 1, the hydraulic fluid compositions performance measurement result that table 1 provides for the embodiment of the invention and comparative example.
The hydraulic fluid compositions performance measurement result that table 1 embodiment of the invention and comparative example provide
As shown in Table 1, the hydraulic efficiency oil excellence that provides than comparative example of carbon residue, ash content, the sealing material adaptability of the hydraulic fluid compositions that provides of the embodiment of the invention.
The hydraulic efficiency oil that the embodiment of the invention and comparative example are provided has carried out the residue test comparison, method is with reference to the measuring method (GB/T17144) of carbon residue, copper sheet is put into the test carbon residue in vitro, the oil sample that adds 2g, testing method test according to carbon residue, test the back and observed tinsel and test tube situation, the results are shown in Figure the carbon residue test result figure of the hydraulic efficiency oil that 1, Fig. 1 prepares for the embodiment of the invention and comparative example; The hydraulic efficiency oil for preparing for embodiment 1 in the test tube 1 wherein, the hydraulic efficiency oil that test tube 2 prepares for embodiment 2, the MOBIL H15 that test tube 3 provides for comparative example 3, the ESSO32# oil that test tube 4 provides for comparative example 1, the Shijiazhuang that test tube 5 provides for comparative example 2 does not have stain oil, and as seen from Figure 1, the hydraulic efficiency oil residue that the embodiment of the invention prepares is less, the copper sheet light discolouration, tube wall is clean.Simultaneously carbon residue weight is tested, test result sees Table 2, the nothing stain hydraulic efficiency oil carbon residue test result that table 2 provides for the embodiment of the invention and Comparative Examples.
The nothing stain hydraulic efficiency oil carbon residue test result that table 2 embodiment of the invention and Comparative Examples provide
As shown in Table 2, the residue of the hydraulic fluid compositions that the embodiment of the invention provides is low, and annealing cleanness is good.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a hydraulic fluid compositions is characterized in that, comprising:
2. hydraulic fluid compositions according to claim 1 is characterized in that, described base oil is mineral oil.
3. hydraulic fluid compositions according to claim 2 is characterized in that, described mineral oil is the low sulfur and low aromatics mineral oil of the full hydrogenation deep refining of high pressure.
4. hydraulic fluid compositions according to claim 1 is characterized in that, described viscosity index improver is the polyisobutene base polymer.
5. hydraulic fluid compositions according to claim 1 is characterized in that, described oiliness improver is selected from one or more in lipid acid, fatty acid ester, organophosphate and the phosphorous acid ester.
6. hydraulic fluid compositions according to claim 1 is characterized in that, described extreme pressure anti-wear additives is selected from one or more in phosphoric acid ester and the phosphorous acid ester.
7. hydraulic fluid compositions according to claim 1 is characterized in that, described oxidation inhibitor is selected from one or more in phenolic compound or the aminated compounds.
8. hydraulic fluid compositions according to claim 1 is characterized in that, described corrosion inhibitor is selected from one or more in lipid acid, derivative of fatty acid and the phosphate compounds.
9. the preparation method of a hydraulic fluid compositions is characterized in that, may further comprise the steps:
Viscosity index improver, oiliness improver, extreme pressure anti-wear additives, oxidation inhibitor, corrosion inhibitor and base oil mixing, heating, stirring are obtained hydraulic fluid compositions.
10. preparation method according to claim 9 is characterized in that, described Heating temperature is 50 ℃～80 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695113A (en) * | 2013-12-14 | 2014-04-02 | 广西大学 | Lubricant for drawing lead and alloy thereof |
| CN104560262A (en) * | 2014-12-23 | 2015-04-29 | 江西科技学院 | Production method of hydraulic transmission oil |
| CN104987942A (en) * | 2015-07-16 | 2015-10-21 | 中国石油化工股份有限公司 | Hydraulic oil |
| CN106590849A (en) * | 2015-10-19 | 2017-04-26 | 中国石油化工股份有限公司 | Hydraulic oil composition and production method therefor |
| CN107937099A (en) * | 2017-11-29 | 2018-04-20 | 浙江实美润滑科技有限公司 | A kind of dedicated antiwear hydraulic oil of injection molding machine and preparation method |
| CN109054937A (en) * | 2018-06-06 | 2018-12-21 | 江苏中海重型机床有限公司 | A kind of antirust is without stain hydraulic fluid |
| CN112375610A (en) * | 2020-11-12 | 2021-02-19 | 中国石油化工股份有限公司 | Special non-stain hydraulic oil composition for rolling copper strips, preparation method and application thereof |
| CN113355149A (en) * | 2021-06-21 | 2021-09-07 | 江苏万标检测有限公司 | Preparation method of anti-wear hydraulic oil |
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| CN102757842A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Ashless low-temperature hydraulic oil |
| CN103087807A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | High-detergency hydraulic oil composition |
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| CN102757842A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Ashless low-temperature hydraulic oil |
| CN103087807A (en) * | 2011-11-04 | 2013-05-08 | 中国石油化工股份有限公司 | High-detergency hydraulic oil composition |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695113A (en) * | 2013-12-14 | 2014-04-02 | 广西大学 | Lubricant for drawing lead and alloy thereof |
| CN103695113B (en) * | 2013-12-14 | 2015-04-29 | 广西大学 | Lubricant for drawing lead and alloy thereof |
| CN104560262A (en) * | 2014-12-23 | 2015-04-29 | 江西科技学院 | Production method of hydraulic transmission oil |
| CN104987942A (en) * | 2015-07-16 | 2015-10-21 | 中国石油化工股份有限公司 | Hydraulic oil |
| CN104987942B (en) * | 2015-07-16 | 2017-12-01 | 中国石油化工股份有限公司 | A kind of hydraulic oil |
| CN106590849A (en) * | 2015-10-19 | 2017-04-26 | 中国石油化工股份有限公司 | Hydraulic oil composition and production method therefor |
| CN106590849B (en) * | 2015-10-19 | 2019-08-16 | 中国石油化工股份有限公司 | Hydraulic fluid compositions and its manufacturing method |
| CN107937099A (en) * | 2017-11-29 | 2018-04-20 | 浙江实美润滑科技有限公司 | A kind of dedicated antiwear hydraulic oil of injection molding machine and preparation method |
| CN109054937A (en) * | 2018-06-06 | 2018-12-21 | 江苏中海重型机床有限公司 | A kind of antirust is without stain hydraulic fluid |
| CN112375610A (en) * | 2020-11-12 | 2021-02-19 | 中国石油化工股份有限公司 | Special non-stain hydraulic oil composition for rolling copper strips, preparation method and application thereof |
| CN113355149A (en) * | 2021-06-21 | 2021-09-07 | 江苏万标检测有限公司 | Preparation method of anti-wear hydraulic oil |
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