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WO2011161986A1 - Composition d'huile hydraulique - Google Patents

Composition d'huile hydraulique Download PDF

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Publication number
WO2011161986A1
WO2011161986A1 PCT/JP2011/054128 JP2011054128W WO2011161986A1 WO 2011161986 A1 WO2011161986 A1 WO 2011161986A1 JP 2011054128 W JP2011054128 W JP 2011054128W WO 2011161986 A1 WO2011161986 A1 WO 2011161986A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
lubricating
mass
hydraulic fluid
lubricating 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.)
Ceased
Application number
PCT/JP2011/054128
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English (en)
Japanese (ja)
Inventor
一聡 高橋
裕治 設楽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
JX Nippon Oil and Energy Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JX Nippon Oil and Energy Corp filed Critical JX Nippon Oil and Energy Corp
Priority to CN2011800315186A priority Critical patent/CN102959066A/zh
Priority to JP2012521343A priority patent/JP5769707B2/ja
Publication of WO2011161986A1 publication Critical patent/WO2011161986A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/102—Polyesters
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/76—Reduction of noise, shudder, or vibrations
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids

Definitions

  • the present invention relates to a hydraulic fluid composition having a function of suppressing the occurrence of stick-slip at a sliding portion of a hydraulic cylinder and an excellent oil / water separation performance.
  • pressurization energy of the hydraulic pump is used as kinetic energy (work energy)
  • kinetic energy work energy
  • hydraulic systems that can be converted.
  • various members such as metals or metals and resins and rubber materials slide, and are lubricated with hydraulic fluid in order to perform smooth sliding thereof.
  • the sliding speed is extremely slow, the oil film forming capability is insufficient, the oil film breaks, and if the static friction coefficient is significantly larger than the dynamic friction coefficient, stick slip occurs on the sliding surface, and noise and vibration are generated. .
  • This stick slip is likely to occur especially when the sliding speed is 0.01 m / s or less, and among the members, particularly when sliding between metal and rubber material, the adhesion and sliding are repeated between the members. Since this is a forward motion, the increase in the coefficient of friction and the generation of vibration are greater than in sliding between metals.
  • lubricating oil for internal combustion engines uses a metal-based organic compound such as molybdenum to reduce the friction coefficient, but when this is applied to hydraulic fluid, the metal component becomes sludge insoluble in the lubricating oil and the operating part There is a problem in that the service life of the device itself is shortened.
  • the present applicant has proposed a lubricating oil composition for machine tools having a stick-slip resistance containing 0.05 to 10% by mass of a polycarboxylate in a lubricating base oil and also having excellent oil / water separation properties ( Patent Document 1).
  • this lubricating oil has a problem that stick slip generation cannot be sufficiently suppressed in a hydraulic cylinder having a low sliding speed because the friction modifier is relatively weakly adsorbed on the metal surface.
  • the inventors of the present invention have made mineral oil and / or poly- ⁇ -olefin base oil, have a kinematic viscosity at 40 ° C.
  • the problem to be solved by the present invention is to provide a hydraulic fluid composition having high stick-slip generation suppressing performance and excellent oil / water separation performance.
  • a lubricant base oil contains glycerol stearate and a small amount of polyalkylene glycol, thereby suppressing stick-slip suppression performance and oil-water separation performance.
  • the inventors have found that it is possible to achieve both, and have arrived at the present invention.
  • the hydraulic fluid composition of the present invention comprises a polyalkylene glycol having 0.01 to 10% by mass of glycerol stearate and a weight average molecular weight of 5,000 to 20,000 based on the total amount of the lubricating oil. Is contained in an amount of 0.0001 to 0.1% by mass based on the total amount of the lubricating oil, the kinematic viscosity at 40 ° C. is 10 to 600 mm 2 / s, and the viscosity index is 80 or more.
  • glycerol monoisostearate is used as the glycerol stearate
  • an ethylene oxide-propylene oxide copolymer is used as the polyalkylene glycol
  • the polymerization molar ratio of ethylene oxide to propylene oxide (propylene oxide / ethylene oxide) is 0.5 to It is to use 3.5.
  • the hydraulic fluid of the present invention has a remarkable effect of having a high stick-slip generation suppressing performance and an excellent oil / water separation performance.
  • the hydraulic fluid composition of the present invention comprises a lubricating base oil containing specific amounts of glycerol stearate and polyalkylene glycol, and has a kinematic viscosity at 40 ° C. of 10 to 600 mm 2 / s and a viscosity index of 80. That's it.
  • the kinematic viscosity is preferably 10 ⁇ 460mm 2 / s at this 40 ° C., and more preferably 10 ⁇ 320mm 2 / s.
  • a sufficient oil film is not formed.
  • the viscosity index is preferably 90 or more, more preferably 100 or more, and the higher the viscosity index, the more preferable, but generally 250 or less is sufficient. If the viscosity index is less than 80, depending on the operating temperature, the driving ability at the time of start-up decreases.
  • the base oil used in the hydraulic fluid of the present invention is the main component of the lubricating oil. If it is used as a normal lubricating base oil, mineral oil, synthetic oil, or a mixture thereof can be used. Either can be used.
  • the pour point is preferably ⁇ 5 ° C. or lower, more preferably ⁇ 10 ° C. or lower.
  • the viscosity index is preferably 80 or more, and more preferably 100 or more.
  • the lubricating base oil is a main component that accounts for 80% or more, and in some cases 90% or more of the hydraulic fluid, it is preferable that the lubricating base oil has physical properties close to those of the desired lubricating oil.
  • the flash point is 250 ° C. or higher, the hydraulic fluid is not a hazardous material but a flammable liquid and is easy to handle under the Fire Service Act.
  • the lubricating base oil that is the main component of the lubricating oil also preferably has a flash point of 250 ° C. or higher. In the case of a mixture of a plurality of lubricating base oils, as long as the mixture satisfies the above physical properties, it can be used even if the individual base oils before mixing are out of the physical property range.
  • Examples of the mineral oil-based lubricating base oil include lubricating oil fractions obtained by purifying distillate obtained by subjecting crude oil to atmospheric distillation or further distillation under reduced pressure by various purification processes.
  • the refining process includes hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, sulfuric acid washing, clay treatment, etc., and these can be combined and processed in an appropriate order to obtain the base oil of the present invention.
  • a mixture of refined oils having different properties, obtained by different crude oils or distillate oils by different process combinations and sequences, is also useful. Any method can be preferably used by adjusting the properties of the obtained base oil so as to satisfy the aforementioned viscosity, flash point, pour point and viscosity index.
  • the synthetic base oil it is preferable to use a base material having excellent hydrolysis stability.
  • polyolefins such as poly- ⁇ -olefin, polybutene and copolymers of two or more kinds of olefins, polyester, Examples thereof include alkylene glycol, alkylbenzene, and alkylnaphthalene.
  • poly- ⁇ -olefins are preferable in terms of availability, cost, viscosity characteristics, oxidation stability, and compatibility with system components.
  • the poly- ⁇ -olefin is more preferably a polymer such as 1-dodecene or 1-decene in terms of cost.
  • the exemplified synthetic oils can be used alone or in admixture of two or more. Furthermore, it can also be used by mixing with the mineral oil.
  • the individual base oils before mixing have such physical properties. Can be used even if out of range. Accordingly, the individual synthetic base oils do not necessarily satisfy the above physical properties, but are preferably within the above physical properties.
  • the glycerol stearate of the present invention includes glycerol isostearate. That is, it is an ester of glycerol (glycerin) and stearic acid or isostearic acid. These esters include mono-, di- and triesters, and di- and triesters include complex esters of stearic acid and isostearic acid. In the present invention, any of these or a mixture of a plurality of these can be used. In this glycerol stearate, the oily effect of the lipophilic group due to the fact that the lubricating coating can be chemically ordered is improved because the carbon chain is saturated. In the present invention, it is preferable to use glycerol monoisostearate which has a branched chain and thus improves the solubility in base oil.
  • the content of the glycerol stearate is 0.01 to 10% by mass, preferably 0.02 to 1% by mass, based on the total amount of the lubricating oil.
  • the content is less than 0.01% by mass, a sufficient stick-slip suppressing effect cannot be obtained.
  • the content exceeds 10% by mass, not only the effect is saturated, but also problems such as precipitation occur.
  • the polyalkylene glycol of the present invention includes any one of two or more ring-opening polymers or copolymers of alkylene oxides having 2 to 4 carbon atoms, specifically, ethylene oxide, propylene oxide, butylene oxide and isobutylene oxide.
  • ethylene oxide-propylene oxide copolymers are preferable, and those having a polymerization molar ratio of ethylene oxide to propylene oxide (propylene oxide / ethylene oxide) of 0.5 to 3.5 are more preferable, and 1.0 to 3.0 is particularly preferred.
  • the polyalkylene glycol has a weight average molecular weight (MW) of 5,000 to 20,000, preferably 6,000 to 15,000, more preferably 8,000 to 12,000. . When the weight average molecular weight (MW) is outside the range of 5,000 to 20,000, the demulsibility performance is not sufficiently secured, and the oil / water separation performance at the time of mixing with water is insufficient.
  • the content of the polyalkylene glycol is 0.0001 to 0.1% by mass based on the total amount of the lubricating oil, but preferably 0.001 to 0.05% by mass. If the content is less than 0.0001% by mass, sufficient oil / water separation performance cannot be obtained, and if it exceeds 0.1% by mass, the oil / water separation performance is deteriorated.
  • a viscosity index improver In the lubricating oil of the present invention, a viscosity index improver, a pour point depressant, an antioxidant, a rust inhibitor, an antiwear agent, an extreme pressure agent, an antifoaming agent, a metal deactivator, and the like can be appropriately blended. it can.
  • the viscosity index improver is preferably added because it can save energy by increasing the viscosity index of the lubricating oil.
  • a PMA polymer, an olefin polymer, or an ethylene- ⁇ -olefin polymer can be used. The addition amount is preferably 0.1 to 10% by mass.
  • the pour point depressant is preferably a polymer having a molecular weight of 400,000 to 600,000 which is effective when added in a small amount, particularly a PMA polymer or polybutene, and its addition amount is preferably in the range of 0.05 to 0.5% by mass, A range of 0.05 to 0.3% by mass is more preferable.
  • antioxidant a phenolic antioxidant, an amine antioxidant, and the like that are generally used for lubricating oils can be appropriately blended.
  • rust preventive agent generally known additives such as metal salts such as Ca and Ba (such as sulfonates), nonionic compounds (such as sorbitan esters and nonylphenyl ethers), and succinic acid partial esters are appropriately used. Can be blended.
  • antiwear / extreme pressure agents include sulfur (zirconium disulfide, sulfurized olefin, etc.), phosphorus (tricresyl phosphate, dialkyldithiothiophosphate, etc.), organometallic (zinc dialkyldithiophosphate, etc.) Etc.
  • antifoaming agent examples include silicone-based and PMA polymer-based materials
  • metal deactivator examples include benzotriazole and thiadiazole.
  • a lubricating base oil mineral oils and synthetic oils having the properties shown in Table 1 and subjected to solvent dewaxing after hydrorefining (poly- ⁇ -olefins: mixtures of INEOS DURASYN 168 and 180, fatty acid esters: Croda EMKARATE 1700) was used.
  • Glycerol monoisostearate is used as the glycerol stearate.
  • friction modifiers such as polycarbonate (Rhein Chemie RC8100), sulfurized ester (Dainippon Ink and Chemicals, Dailube FS-150), molybdenum dithiocarbamate (ADEKA Sakura Rube 165), etc. was used.
  • a predetermined amount of the lubricating base oil and additives shown in Table 2 were weighed in a stainless steel container and heated to 60 ° C. to uniformly dissolve the additives.
  • 0.5% by mass of an antioxidant and 0.5% by mass of an antiwear agent are added to the base oil as basic additives. Were blended to give basic performance (antioxidation, etc.) as a lubricating oil.
  • the kinematic viscosity and the viscosity index are 40 ° C. and 100 ° C. according to JIS K2283
  • the oxidation stability is a rotary cylinder type oxidation stability test according to JIS K 2514 ( RBOT)
  • the demulsibility was measured at 54 ° C. according to JIS K2520.
  • the friction test was done with the following method.
  • Friction test LMW-1 testing machine using block (nitrile rubber) / ring (SUJ-2) as sliding material, load 44N, temperature 70 ° C, sliding speed 5 minutes each, 0.01m / s , 0.1 m / s, 0.6 m / s, and 1 m / s. The coefficient of friction at each speed was used as data. In addition, if chatter or abnormal vibration is observed during the friction test, it is determined that stick-slip is present when the friction coefficient partially increases or decreases when the change in friction coefficient over time is observed on the recording chart. did. These results are shown in Table 2.
  • Comparative Example 2 has high stick-slip suppression performance, but compared with Examples 1-4 in terms of oil-water separation performance. And low.
  • the stickiness lip suppression performance was inferior to that of Examples 1 to 4.
  • Comparative Example 6 has poor oxidation stability as compared with the Examples, and there is a concern that troubles may occur at an early stage in the hydraulic system due to sludge generation due to oxidation degradation during long-term use.
  • Comparative Examples 7 and 8 polyalkylene glycol having a weight average molecular weight of 25,000 or 2,000 was added, but sufficient anti-emulsification performance was not ensured, and oil / water separation performance at the time of water mixing was insufficient. Yes. Further, in Comparative Example 9, when the addition amount of polyalkylene glycol was increased to 0.5%, the oil / water separation property was deteriorated.
  • glycerol stearate as a friction modifier according to the present invention in combination with polyalkylene glycol having a specific weight average molecular weight, stick-slip suppression performance, oxidation stability performance, Separation performance can be provided.
  • stick-slip suppression performance oxidation stability performance
  • Separation performance can be provided.
  • the hydraulic fluid composition of the present invention is a hydraulic system capable of converting pressure energy of a hydraulic pump into kinetic energy (work energy), for example, industrial equipment such as an injection molding machine, a machine tool, a press machine, and a forging press machine. It can be used as hydraulic fluid for hydraulic equipment and devices such as machines, construction machines, machine tools, vehicles, ships and aircraft.
  • the hydraulic fluid composition of the present invention is excellent in stick-slip generation suppressing performance and oil-water separation performance, it can be used for sliding parts of hydraulic cylinders such as forklifts and construction machines used outdoors or arm cylinders of various dampers. Useful for lubrication of sliding parts.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne une huile hydraulique qui non seulement présente une capacité de réguler la survenance d'importants broutages, mais est aussi dotée d'une excellente capacité de séparation huile et eau. Plus précisément, l'invention concerne une huile hydraulique qui comprend, dans une huile de base lubrifiante : un glycérol stéarate, de préférence un glycérol mono-isostéarate, à raison de 0,01 à au plus 10% en masse de la masse totale d'huile lubrifiante, et un polyalkylène glycol de poids moléculaire moyen en masse de 5000 à 20000, à raison de 0,0001 à 0,1% en masse de la masse totale d'huile lubrifiante. L'huile hydraulique présente une viscosité cinétique à 40°C de 10 à 600mm2/s, et un indice de viscosité d'au moins 80.
PCT/JP2011/054128 2010-06-25 2011-02-24 Composition d'huile hydraulique Ceased WO2011161986A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800315186A CN102959066A (zh) 2010-06-25 2011-02-24 液压工作油组合物
JP2012521343A JP5769707B2 (ja) 2010-06-25 2011-02-24 油圧作動油組成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-145377 2010-06-25
JP2010145377 2010-06-25

Publications (1)

Publication Number Publication Date
WO2011161986A1 true WO2011161986A1 (fr) 2011-12-29

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JP (1) JP5769707B2 (fr)
CN (1) CN102959066A (fr)
WO (1) WO2011161986A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011080587A (ja) * 2009-09-08 2011-04-21 Cosmo Oil Lubricants Co Ltd 作動油の省電力効果評価装置及びこれを用いた省電力効果評価方法
CN103525517A (zh) * 2013-09-29 2014-01-22 深圳市奥科宝特种油剂有限公司 冷锻压油及其用途
JP2014141576A (ja) * 2013-01-23 2014-08-07 Cosmo Oil Lubricants Co Ltd 油圧作動油組成物
CN104962365A (zh) * 2015-07-20 2015-10-07 广西大学 钨铼合金棒材旋锻润滑剂组合物
CN104962352A (zh) * 2015-06-10 2015-10-07 柳州科尔特锻造机械有限公司 一种轮毂锻压用油的加工方法
CN104962350A (zh) * 2015-06-10 2015-10-07 柳州科尔特锻造机械有限公司 一种轮毂锻压用油的配方
CN106085579A (zh) * 2016-06-22 2016-11-09 上海尤希路化学工业有限公司 高脱模性低残留可循环使用轮毂锻造用润滑剂
CN119060774A (zh) * 2024-11-04 2024-12-03 烟台德高能源科技有限公司 一种具有优异表面性能的环保型锯切液及其制备方法

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CN106085579A (zh) * 2016-06-22 2016-11-09 上海尤希路化学工业有限公司 高脱模性低残留可循环使用轮毂锻造用润滑剂
CN119060774A (zh) * 2024-11-04 2024-12-03 烟台德高能源科技有限公司 一种具有优异表面性能的环保型锯切液及其制备方法

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