WO2005035702A1 - 潤滑油 - Google Patents
潤滑油 Download PDFInfo
- Publication number
- WO2005035702A1 WO2005035702A1 PCT/JP2004/014942 JP2004014942W WO2005035702A1 WO 2005035702 A1 WO2005035702 A1 WO 2005035702A1 JP 2004014942 W JP2004014942 W JP 2004014942W WO 2005035702 A1 WO2005035702 A1 WO 2005035702A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lubricating oil
- ionic liquid
- integer
- same
- oil according
- Prior art date
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
- G04B31/08—Lubrication
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- 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
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/56—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/72—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing sulfur, selenium or tellurium
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/74—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing phosphorus
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
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- 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
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/0803—Inorganic acids or salts thereof used as base material
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/085—Phosphorus oxides, acids or salts
- C10M2201/0853—Phosphorus oxides, acids or salts used as base material
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
- C10M2201/0873—Boron oxides, acids or salts used as base material
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- 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
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- 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
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- C10M2207/285—Esters of aromatic polycarboxylic acids
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- C10M2215/041—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms used as base material
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- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C10M2215/2245—Imidazoles used as base material
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- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/0406—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides used as base material
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Definitions
- the present invention relates to a lubricating oil, and more particularly, to a lubricating oil which has a low viscosity even at a low viscosity, has no danger of ignition, and further has excellent heat resistance. It has no friction characteristics and can be used for a long time under extremely severe conditions such as high temperature and vacuum, and it can be used for internal combustion engines, torque transmission devices, fluid couplings, plain bearings, rolling bearings, oil-impregnated bearings, and fluid bearings.
- the present invention relates to a lubricating oil suitably used for aero-space equipment such as an aircraft, an artificial satellite or the like, a lubricating oil, a lubricating characteristic control method using the lubricating oil, and a lubricating oil control device.
- lubricating oils are required to have low viscosity as much as possible in order to reduce viscous drag, which causes power loss, and have heat resistance and can withstand long-term use. There is a need for lubricating oils to be obtained.
- lubricating oils are generally composed of organic substances mainly composed of hydrocarbons, and lowering the viscosity inevitably increases the vapor pressure, which increases the evaporation loss of the lubricating oil and the risk of ignition.
- lubricating oil used in equipment that handles hot objects such as machinery in a steel mill (eg, hydraulic oil) must have flame retardancy in terms of fire prevention.
- lubricating oil that does not easily evaporate or scatter is required to minimize the effect on peripheral precision equipment. Yes.
- fatty oils, silicone oils, and fluorine-based oils such as perfluoropolyether have been used as lubricating oils that overcome these problems and have low viscosity and low vapor pressure and excellent heat resistance.
- fatty acid esters have poor water resistance due to their easily hydrolyzed ester structure.
- silicone oils and fluorine-based oils which have excellent heat resistance and water resistance, have lubricity compared to conventional hydrocarbon-based lubricants.
- an organic ionic liquid composed of a cation and an ion has a series of ethylmethylimidazolyl salts having different ions, excellent thermal stability and high ion conductivity.
- thermal stability non-volatile, non-flammable
- high ion density high ionic conductivity
- Ionic liquids are connected by strong ionic bonds, unlike molecules that are connected by intermolecular attraction like molecular liquids. It is a stable liquid. Therefore, it is the only lubricating oil that can satisfy the high demands required in the future because it has low evaporability even at low viscosity and excellent heat resistance.
- the physical properties of ionic liquids are largely controlled by the ionic bonds acting between the molecules. Therefore, unlike molecular liquids such as hydrocarbons, it is difficult to predict physical properties from the molecular structure. By changing the structure, it is not easy to control various properties such as viscosity, viscosity index, and pour point. That is, it is difficult to design and synthesize a compound having desired physical properties.
- ionic liquids are originally salts composed of cations and a-ones, they may dissolve in water at an arbitrary ratio depending on the combination of the cations and a-ones constituting the ionic liquid (for example, , Non-Patent Document 2). Therefore, in an environment where there is no moisture, Even ionic liquids that do not cause dissolution or corrosion may absorb moisture in environments where water is likely to be mixed, and may cause decomposition or corrosion. Furthermore, even among ionic liquids having excellent heat resistance, ions having poor oxidizing stability or being easily decomposed by reduction (for example, imidazolyl ion) (for example, see Non-Patent Document 3), ions having high toxicity and environmental load (For example, BF-, CD
- ionic liquids are composed of positively and negatively charged cations and ions, they have electrical characteristics such as orientation with respect to an electric field and formation of an electric double layer on the electrode surface. Also have. These properties of ionic liquids suggest that if an electric field is applied to the lubricating point where the ionic liquid is present, the electrical properties will develop and may have some effect on the friction properties, You.
- Patent Document 1 JP 2003-31270 A
- Patent Document 2 JP-A-5-25488
- Patent Document 3 Japanese Patent Application Laid-Open No. 2000-1694
- Patent Document 4 Japanese Patent Application Laid-Open No. 2000-130687
- Non-patent document 1 "J. Chem. Soc., Chem. Commun.”, 965 (1992)
- Non-patent document 2 “The forefront and future of ionic liquid development", CMC Publishing Co., Ltd.
- Non-patent Reference 3 "M. Ui, Curr. Top. Electrochem.”, 7, 49 (2000) Disclosure of Invention
- the present invention has been made in view of the above circumstances, and has even more excellent heat resistance even with a low viscosity, low vapor pressure and no danger of ignition. It is an object of the present invention to provide a lubricating oil which has comparable friction characteristics and can be used for a long time under extremely severe conditions such as high temperature and vacuum. It is another object of the present invention to provide a lubricating oil in which the physical properties (viscosity index, pour point, etc.) of the lubricating oil are greatly improved, and a lubricating oil having no toxicity and corrosiveness by a simple method. It is another object of the present invention to provide a method for controlling lubricating characteristics when using these lubricating oils, and a device for controlling lubricating oil characteristics using these lubricating oils.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that the above object is achieved by using an ionic liquid composed of a cation and anion as a base oil. I found it.
- the present invention has been completed based on powerful knowledge.
- the present invention provides the following lubricating oil, lubricating characteristic control method and lubricating oil control device.
- Lubricating oil containing an ionic liquid composed of a cation and an ion force as a base oil and having an ionic concentration of ImolZdm 3 or more.
- the lubricating oil as described in 1 above comprising 50-100% by mass of an ionic liquid having a total acid value of 1 mgKOHZg or less as a base oil.
- the ionic liquid has the following general formula
- Z P + is a cation
- a q — is an aon.
- Z or A may be the same or different.
- the base oil contains 50-100% by mass of ionic liquids of the general formula Z + A— (Z + is a cation and A— is an a-one) with a total acid value of lmgKOH / g or less.
- Z + is a cation and A— is an a-one
- the lubricating oil according to the above 4 which is a mixture of two or more ionic liquids. 6.
- the lubrication described in 5 above which is a mixture containing one kind of Z + and two or more kinds of A—, a mixture containing two kinds or more of Z + and one kind of A— or a mixture containing two or more kinds of Z + and two or more kinds of A— oil.
- R 1 — R 12 are a hydrogen atom, a C 11 -C 18 alkyl group and an C 11 -C 18 alkoxyl group which may have an ether bond, 1 — R 12 may be the same or different.
- R 1 — R 12 are a hydrogen atom, a C 11 -C 18 alkyl group and an C 11 -C 18 alkoxyl group which may have an ether bond, 1 — R 12 may be the same or different.
- Y 1 represents a carbon atom or a sulfur atom, and when ⁇ 1 is plural,
- ⁇ may be the same or different. ⁇ 1 one 6 integer, X is 0-13 integer, zeta is Upsilon 1 1 one third integer when carbon atoms, Upsilon 1 is the case of the sulfur atom is an integer of 0 4. ), B (C ⁇ 2 ) ", P (CY 2
- Y 2 is a hydrogen atom or a fluorine atom, when Upsilon 2 is a plurality, they are different from each other the same, even yo. Further, a plurality of (CY 2 ) may be the same or different,
- R "—R 17 is a group selected from a hydrogen atom and (CFH), and R" —R 17 is
- n and X are the same as above.
- the ion (A—) that composes the ionic liquid is PF—, C H OSO—, (C F
- R “—R” is a group selected from a hydrogen atom and (C F ⁇ );
- the ion ( ⁇ —) that composes the ionic liquid is C H OSO—, (C F H) SO
- R 13 — R 17 is a group selected from a hydrogen atom and (CFH);
- n and X are the same as above.
- the ionic liquid has the following general formula
- R 1 — R 5 are a hydrogen atom, an alkyl group having 1-18 carbon atoms and an alkoxyl group having 1-18 carbon atoms which may have an ether bond, 1 — R 5 may be the same or different.
- R 1 — R 12 are a hydrogen atom, a C 11 -C 18 alkyl group and an C 11 -C 18 alkoxyl group which may have an ether bond, 1 — R 12 may be the same or different. Provided that at least one of R 1 —R 12 is — (CH 2) —SO—or
- n is an integer of 0 or more such that the alkyl group has 118 carbon atoms.
- the lubricating oil as described in any one of the above items 1-18 which comprises at least one selected from an antioxidant agent and an extreme pressure agent.
- a lubricating characteristic control device comprising: a pair of electrodes for applying an electric field to the two lubricated members in a non-contact manner or with the two lubricating members sandwiching the contact region.
- the lubricating oil of the present invention uses an ionic liquid as a base oil, so that even if it has a low viscosity, the vapor pressure is low and the danger of ignition is eliminated, the heat resistance is further improved, and the conventional hydrocarbon is used. It has friction characteristics comparable to lubricating oils and can be used for a long time under extremely severe conditions such as high temperature and vacuum. Further, a lubricating oil in which the physical properties (viscosity index, pour point, etc.) of the lubricating oil are greatly improved, and a lubricating oil free from toxicity and corrosion can be obtained by a simple method. Further, a method for controlling lubrication characteristics when using these lubricating oils and a lubricating oil characteristic control device using these lubricating oils are provided.
- the lubricating oil of the present invention is a lubricating oil containing an ionic liquid having a cation and anion force as a base oil and having an ionic concentration of ImolZdm 3 or more measured at 20 ° C.
- ion concentration is required to be at ImolZdm 3 or more , preferably 1. 5molZdm 3 or more, more preferably 2MolZdm 3 or more.
- the ion concentration refers to a value calculated by [density (gZcm 3 ) Z molecular weight MW (gZmol)] ⁇ 1000 in the ionic liquid.
- the lubricating oil of the present invention preferably contains, as a base oil, 50 to 100% by mass of an ionic liquid having a total acid value of 1 mgKOHZg or less.
- an ionic liquid having a total acid value of 1 mgKOHZg or less.
- the ionic liquid the following general formula (Zp + ) (A q —)
- p, q, k and m are preferably 2 or less in the above formula, and p, q, k and m are 1, and a general formula Z + A— (where Z + is a cation, ⁇ Well -. it is on) and more preferably those containing ionic liquids 50- 100 mass 0/0 expressed by.
- the content of the ionic liquid is preferably from 70 to 100% by mass, more preferably from 90 to 100% by mass.
- R 1 — R 12 are a hydrogen atom, a C 11 -C 18 alkyl group and an C 11 -C 18 alkoxyl group which may have an ether bond, 1 — R 12 may be the same or different.
- alkyl group having 1 to 18 carbon atoms which may have an ether bond of R 1 to R 12 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a sec.
- alkyl group having 1 to 18 carbon atoms which may have an ether bond of R 1 to R 12 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a sec.
- Examples include butyl group, tert-butyl group, various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, and 2-methoxyethyl groups.
- Examples of the C11-C18 alkoxy group include methoxy, ethoxy, n -propoxy, isopropoxy, n -butoxy, isobutoxy, sec butoxy, tert-butoxy, various pentoxy groups, various heptoxy groups, Various otatoxy groups and the like can be mentioned.
- the present invention Is preferably an alkyl group having 1 to 10 carbon atoms,
- Examples of the above-mentioned on (A—) include BF—, PF—, C H OSO—, (C F H)
- Y 1 represents a carbon atom or a sulfur atom, and when ⁇ 1 is plural, they may be the same or different. In addition, plural F ⁇ ) may be the same or different.
- Y 2 represents a hydrogen atom or a fluorine atom, and when there are a plurality of Y 2 , they may be the same or different! In addition, a plurality of (CY 2 ) may be the same or different.
- m is 0—
- R "—R 17 is a group selected from a hydrogen atom and (CFH), and R" —R 17 is
- n and X are the same as above.
- the iron represented by the following formula is preferred.
- these aions those containing a fluorine atom are particularly preferred.
- Y 1 represents a carbon atom or a sulfur atom, and when a plurality of Y 1 are present, they may be the same or different.
- n is an integer from 1 to 6
- X is an integer from 0 to 13
- z is an integer from 1 to 3 when Y 1 is a carbon atom, and an integer from 0 to 4 when Y 1 is a sulfur atom.
- Examples of the ionic liquid represented by the general formula (ZP + ) ( Aq ") used as a base oil include, for example,
- M is a cation selected from H +, Li +, Na +, K +, Pb +, and Cs +, and n is an integer of 0 to 18.
- ionic liquid represented by the general formula Z + A— used as the base oil examples include 1-butyl-3-methylimidazolyltetrafluoroborate, 1-butyl-3-methylimidazo Liumhexafluoroborate, 1-hexyl 3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolimb bis (trifluoromethanesulfol) imide, alkylpyridi-dimethyltetrafluoroborate , Alkylpyridin-dimethylhexafluorophosphate, alkylpyridin-dimethylbis (trifluoromethanesulfonyl) imide, anolequinoleammonium-tetrafluoronoroborate, anolequinoleammonium-dimethylhexafluorophenol phosphate, alkylammonium- To emmbis (trifluoromethanesulfonyl) imide, N, N-
- alkylpyridin-dimethylhexafluorophosphate alkylpyridiniumbis (trifluoromethanesulfonyl) imide
- alkylammonium-hexafluorophosphate alkylammonium-dimethylbis (trifluoromethanesulfonyl) ) Imide
- N, N-Gethyl-N-methyl (2-methoxyethyl) ammona-hexafluorophosphate and N, N-Gethyl-N-methyl (2-methoxyethyl) ammo-dimethylbis (trifluoromethanesulfonyl) imide Preferred,.
- a lubricating oil having significantly improved physical properties can be obtained.
- the mixing ratio can be set arbitrarily, but the mixing amount of each ionic liquid is preferably 10% by mass or more based on the mixture from the viewpoint of obtaining the effect of the mixing.
- the mixture include a mixture containing one type of Z + and two or more types of A—, a mixture containing two or more types of Z + and one type of A—, and a mixture containing two or more types of Z + and two or more types of A—.
- R 1 - IT is a hydrogen atom
- an alkoxyl group functionalization are also selected Al kill group and a carbon number 1 one 18 of ether bonds having optionally a C 1 one may be 18, R 1 — R 5 may be the same or different.
- Ionicity not containing cations imidazolym ions
- a lubricating oil having no toxicity and no corrosiveness can be obtained.
- ionic liquids include alkyl pyridi-dimethylhexafluorophosphate, alkylpyridi-dimethyl bis (trifluoromethanesulfonyl) imide, alkylammonium hexafluorophosphate, Ammonium bis (trifluoromethanesulfonyl) imide, N, N-Jetyl-N-methyl (2-methoxyethyl) ammo-hexafluorophorophosphate and N, N-Jetyl-N-methyl (2-methoxyethyl) ammo- Dembis (trifluoromethanesulfol) imide and the like.
- alkyl pyridi-dimethyl bis (trifluoromethanesulfonyl) imide alkylammonium-dimethylbis (trifluoromethanesulfol-yl) imide and N, N-Jetyl-N-methyl (2-methoxyethyl) ammonium-dimethylbis (trifluoromethyl) Preferred is methanesulfonyl) imide.
- an ionic liquid composed of a zwitterionic type (Zwitterionic type) in which cations and aions are fixed by covalent bonds and having a total acid value of 1 mgKOHZg or less is also used as the base oil.
- Zwitterionic type a zwitterionic type in which cations and aions are fixed by covalent bonds and having a total acid value of 1 mgKOHZg or less.
- the content of the ionic liquid in the lubricating oil of the present invention is 50 to 100% by mass, preferably 70 to 100% by mass, more preferably 90 to 100% by mass.
- This ionic liquid has, for example, the following general formula
- R 1 — R 12 represent a hydrogen atom or a C 18-18 carbon atom which may have an ether bond.
- a alkyl group and an alkoxyl group having 118 carbon atoms are also selected groups, and R 1 to R 12 may be the same or different.
- at least one of R 1 — R 12 is (CH) —SO— or
- n is an integer of 0 or more such that the alkyl group has 118 carbon atoms.
- Specific examples include 1-methyl-1,3 imidazolidum N-butanesulfonate and N, N-ethyl-N-methylammonium-N-butanesulfonate.
- the total acid value of the ionic liquid needs to be 1 mgKOH / g or less, preferably 0.5 mgKOHZg or less, more preferably 0.3 mgKOHZg or less, from the viewpoint of preventing corrosion of the lubricating oil material. It is.
- Kinematic viscosity at 40 ° C in the ionic liquid, evaporation loss, and from the viewpoint of suppressing the power loss due to viscosity resistance 1-1, more preferably 000 mm 2 Zs is preferably tool 2-320 mm 2 Zs, more preferably 5—100mm 2 Zs.
- the ionic liquid has a pour point of preferably ⁇ 10 ° C. or lower, more preferably 20 ° C. or lower, and still more preferably ⁇ 30 ° C. or lower, from the viewpoint of suppressing an increase in viscous resistance at low temperatures. .
- the flash point of the ionic liquid is preferably at least 200 ° C, more preferably at least 250 ° C, even more preferably at least 300 ° C, from the viewpoint of reducing the amount of evaporation of the base oil.
- the viscosity index of the ionic liquid is preferably 80 or more, more preferably 100 or more, and even more preferably 120 or more, from the viewpoint that the change in viscosity with respect to temperature does not become too large.
- the lubricating oil of the present invention may be used in combination with additives within a range not impairing the effects of the present invention.
- the additives include an antioxidant, an oil agent, an extreme pressure agent, and a cleaning dispersant. , A viscosity index improver, an antioxidant, a metal deactivator and an antifoaming agent. These can be used alone or in combination of two or more.
- antioxidant there can be used an amine antioxidant, a phenolic antioxidant and a sulfur antioxidant used in conventional hydrocarbon-based lubricating oils. These antioxidants can be used alone or in combination of two or more.
- amine-based antioxidant include, for example, monoalkyldiphenylamine compounds such as monooctyldiphenylamine and mononordiphenylamine, 4,4,1-dibutyldiphenylamine, and 4,4′-amine.
- Dialkyldiphenamines such as dipentyldiphenylamine, 4,4 'dihexyldiphenylamine, 4,4'diheptyldiphenylamine, 4,4'dioctyldiphenylamine, 4,4'-dino-didiphenylamine Ruamin compounds, tetrabutyl Jifueniruamin, hexyl diphenyl ⁇ Min to tetra, tetra octyl diphenyl ⁇ Min, Tetorano - Rujifue - polyalkyl di Hue such Ruamin - Ruamin compound, a naphthoquinone Chiruamin, phenylene Lou ⁇ - Nafuchiruamin, Buchirufue Two-way ⁇ -naphthylamine, menthyl-two-way ⁇ -naphthylamine, hexylfe Examples include naphthyl
- phenolic antioxidant examples include monophenolic compounds such as 2,6-di-tert-butyl-4-methylphenol and 2,6-di-tert-butyl-4-ethylphenol, and 4,4′-methylenebis (2, Diphenyl compounds such as 6-di-tert-butylphenol) and 2,2'-methylenebis (4-ethyl-6-tert-butylphenol).
- sulfur-based antioxidant examples include, for example, 2,6-di-tert-butyl-4 (4,6bis (otatylthio) -1,3,5-triazine-2-ylamino) phenol, phosphorus pentasulfide and pinene
- sulfur-based antioxidant examples include, for example, 2,6-di-tert-butyl-4 (4,6bis (otatylthio) -1,3,5-triazine-2-ylamino) phenol, phosphorus pentasulfide and pinene
- examples thereof include thioterpene compounds such as reaction products, and dialkylthiodipropionates such as dilauryl thiodipropionate and distearyl thiodipropionate.
- the compounding amount of these anti-oxidizing agents is usually about 0.01 to 10% by mass, preferably 0.03 to 5% by mass, based on the total amount of the lubricating oil.
- oil agent examples include aliphatic alcohols, fatty acid compounds such as fatty acids and fatty acid metal salts, ester compounds such as polyol esters, sorbitan esters and glycerides, and amine compounds such as aliphatic amines.
- aliphatic alcohol has the following general formula (I)
- R 18 represents an alkyl group, an alkyl group, an alkyl aryl group or an aryl alkyl group having 8 to 30 carbon atoms, preferably 12 to 24 carbon atoms.
- the alkyl group having 8 to 30 carbon atoms include various octyl groups, various nor groups, various decyl groups, various decyl groups, various stearyl groups, various lauryl groups, and various palmityl groups.
- Examples of the alkenyl group having 8 to 30 carbon atoms include an octadecenyl group such as an otathenyl group, a nonenyl group, a decenyl group, and an oleyl group.
- Examples of the alkylaryl group having 8 to 30 carbon atoms include various dimethylphenyl groups, various getylphenyl groups, various dipropylphenyl groups, various methylnaphthyl groups, various ethylethylphthyl groups, and the like.
- Examples of the arylalkyl group having 8 to 30 carbon atoms include a phenethyl group and a naphthylmethyl group. Of these, a stearyl group and an oleyl group are preferred.
- Fatty acid conjugates include the following general formula (II)
- R 19 has a carbon number of 8 30, preferably an alkyl group having a carbon number of 12 24, Aruke -.
- Group, an alkyl ⁇ aryl group and ⁇ reel alkyl force chosen group X 1 is H, K, Na, Mg, Ca, Al, Zn, Fe, Cu and Ag.
- alkyl group, alkyl group, alkylaryl group, and arylalkyl group having 8 to 30 carbon atoms of R 19 include the same as described above, and a steryl group and an oleyl group are preferable.
- X 1 is preferably H, K, Al, or ⁇ .
- ⁇ is an integer of 1 to 3.
- polyol ester examples include polyhydric alcohols such as neopentyl glycol, trimethylolpropane, and pentaerythritol, and the following general formula (III)
- R 2Q represents an alkyl group, an alkyl group, an alkyl aryl group or an aryl alkyl group having 8 to 30 carbon atoms, preferably 8 to 24 carbon atoms.
- Aruke - is a group, the alkyl ⁇ aryl group and ⁇ reel alkyl group, the same groups as those described above, Okuchiru group is particularly preferred.
- the sorbitan ester has the following general formula (IV) [0044] [Formula 14]
- R 21 — R 25 represents a group in which H, OH and CH OCOR 26 are also selected.
- R 26 has 9 carbon atoms
- [0045] is represented by Examples of the alkyl group having a carbon number of 9 one 30 R 26, various nonyl groups, various decyl groups, various Undeshiru groups, various stearyl group, various lauryl group, various palmityl groups.
- Examples of the alkoxy group having 930 carbon atoms include a nonyl group, a decyl group, and an octadecenyl group.
- Preferred fatty acids include lauric, stearic, palmitic and oleic acids.
- R 27 represents an alkyl group or an alkyl group having 8-30 carbon atoms, preferably 12-24 carbon atoms.
- the one represented by Examples of the alkyl group and the alkyl group having 8 to 30 carbon atoms for R 27 include the same as those described above.
- Preferred fatty acids include lauric, stearic, palmitic and oleic acids.
- R 28 represents an alkyl group or an alkenyl group having 3 to 30 carbon atoms, preferably 8 to 24 carbon atoms, or an aryl group or an aryl alkyl group having 6 to 30 carbon atoms, preferably 6 to 15 carbon atoms.
- the alkyl group and the alkyl group may be linear, branched or cyclic.
- Examples of the alkyl group and alkyl group having 3 to 30 carbon atoms and the aryl group and aryl alkyl having 6 to 30 carbon atoms are the same as those described above.
- Examples of the hydroxyalkyl group having 2 to 30 carbon atoms include a hydroxyethyl group and a hydroxypropyl group.
- the amount of these oil agents is usually about 0.1 to 30% by mass, and preferably 0.5 to 10% by mass, based on the total amount of the lubricating oil, from the viewpoint of the effect of blending.
- extreme pressure agents include sulfur extreme pressure agents, phosphorus extreme pressure agents, extreme pressure agents containing sulfur and metals, and extreme pressure agents containing phosphorus and metals. These extreme pressure agents can be used alone or in combination of two or more. Any extreme pressure agent may be used as long as it contains a sulfur atom and a Z or phosphorus atom in the molecule and can exhibit load resistance / abrasion resistance.
- extreme pressure agents containing sulfur in the molecule include, for example, sulfurized fats and oils, sulfurized fatty acids, sulfurized esters, olefins, dihydrocarbyl polysulfides, thiadiazole compounds, alkylthiocarbamoyl compounds, triazine compounds, thioterpene compounds, and dialkylthiodiamines.
- sulfurized fats and oils sulfurized fatty acids, sulfurized esters, olefins, dihydrocarbyl polysulfides, thiadiazole compounds, alkylthiocarbamoyl compounds, triazine compounds, thioterpene compounds, and dialkylthiodiamines.
- Propionate dani, etc. can be mentioned.
- Sulfurized fats and oils are obtained by reacting sulfur or sulfur-containing compounds with fats and oils (such as lard oil, whale oil, vegetable oil, fish oil, etc.).
- the sulfur content is not particularly limited, but is generally 5-30% by mass. Those are preferred. Specific examples thereof include lard sulfide, sultan rape oil, castor oil, sulphide soybean oil, sulcus rice bran oil and the like.
- sulfurized fatty acids include sulfuric acid oleic acid and the like, and examples of sulfuric acid esters include methyl sulfuric acid methyl oleate and fatty acid octyl fatty acid.
- the sulfated olefin includes, for example, the following general formula (VII)
- R 29 represents an alkenyl group having 2 to 15 carbon atoms, preferably 418 carbon atoms
- R 3Q represents an alkyl group or an alkyl group having 215 carbon atoms, preferably 418 carbon atoms.
- A is an integer of 1 to 8, preferably 1 to 3.
- This compound is obtained by reacting a C 2-15 carbon olefin or a 2-4 tetramer thereof with a sulfurizing agent such as sulfur or sulfur chloride.
- a sulfurizing agent such as sulfur or sulfur chloride.
- olefins having 2 to 15 carbon atoms propylene, isobutene, diisobutene and the like are preferable.
- dihydrocarbyl polysulfide the following general formula (VIII)
- R 31 and R 32 each represent an alkyl group or a cyclic alkyl group having 1120 carbon atoms, preferably 4-18 carbon atoms, an aryl group having 6-20 carbon atoms, preferably 6-15 carbon atoms, Represents an alkylaryl group having 7 to 20, preferably 7 to 15 carbon atoms or an arylalkyl group having 7 to 20 carbon atoms, preferably 7 to 15 carbon atoms, which may be the same or different from each other! / B represents an integer of 2-8, preferably 2-4.
- R 31 and R 32 are alkyl groups, they are referred to as alkyl sulfides.
- R 31 and R 32 represent a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n -butyl group, an isobutyl group, a sec -butyl group, a tert-butyl group, Various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, various nonyl groups, various decyl groups, various dodecyl groups, cyclohexyl groups, cyclooctyl groups, phenyl groups, naphthyl groups, tolyl groups, xylyl groups Benzyl group, phenethyl group and the like.
- dihydrocarbyl polysulfide examples include dibenzyl polysulfide, various dinol polysulfides, various didodecyl polysulfides, various dibutyl polysulfides, various dioctyl polysulfides, diphenyl polysulfide, dicyclohexyl polysulfide, and the like. Can be.
- R 33 -R 36 each represent a hydrogen atom, a hydrocarbon group having 112, preferably 41- 13 carbon atoms, and c-f each represent 0-8, preferably 1-4. Indicates an integer.
- 1,3,4-thiadiazole, 1,2,4-thiadiazole compound represented by Asiazole and the like are preferably used.
- Specific examples of such thiadiazole compounds include 2,5 bis (n-hexyldithio) -1,3,4-thiadiazole, 2,5 bis (n-octyldithio) 1,3,4-thiadiazole, 2 2,5-bis (n-nordithio) -1,3,4-thiadiazole, 2,5 bis (1,1,3,3-tetramethylbutyldithio) -1,3,4-thiadiazole, 3, 5 bis (n-hexyldithio) -1,2,4-thiadiazole, 3,5-bis (n-octyldithio) -1,2,4-thiadiazole, 3,5 bis (n-nordithio) -1,
- Preferable examples include 2,4-thiadiazole and 3,5-bis (1,1,3,3-tetramethylbutyldi
- alkylthiol-rubamoyli conjugate examples include, for example, the following general formula (XI)
- —R 4U represents an alkyl group having 1120 carbon atoms, preferably 418 carbon atoms, and g represents an integer of 118, preferably 113).
- alkylthiolrubamoyl compounds include bis (dimethylthiolrubamoyl) monosulfide, bis (dibutylthiolrubamoyl) monosulfide, bis (dimethylthiolrubumoyl) disulfide, bis (dibutylthiolrubamoyl) disulfide, and bis (diamilthiol) ylsulfide.
- Preferable examples thereof include rubamoyl) disulphide and bis (dioctylthio) lubamoyl) disulphide.
- extreme pressure agents containing sulfur, phosphorus and metals include zinc dialkylthio-potassium rubamate (Zn-DTC), molybdenum dialkylthio-potassium molybdate (Mo-DTC), lead dialkylthiocarnomate, and dialkylthiocarnomate.
- Zn-DTC zinc dialkylthio-potassium rubamate
- Mo-DTC molybdenum dialkylthio-potassium molybdate
- lead dialkylthiocarnomate and dialkylthiocarnomate.
- Tin zinc dialkyldithiophosphate
- Mo-DTP molybdenum dialkyldithiophosphate
- sodium sulfonate calcium sulfonate and the like.
- Phosphate esters include phosphoric acid esters, acidic phosphoric acid esters, phosphites, and acidic phosphites represented by the following general formulas ( ⁇ ) to (XVI). [0055] [Formula 18]
- R 44. 0 (X ,,,)
- R 41 —R 51 are an alkyl group, an alkenyl group, an alkylaryl group having 430 carbon atoms, preferably 418 carbon atoms. And R 41 to R 51 may be the same or different and may be! /,.
- Examples of the phosphoric acid ester include triaryl phosphate, trialkyl phosphate, trialk quinole realinole phosphate, triaryl alkyl phosphate, and trianolekeninole phosphate.
- triphenyl phosphate triaryl phosphate Cresyl phosphate, benzinoresife-norephosphate, etinoresife-norephosphate, tribubutinolesphosphate, etinoresifebutinolesphosphate, berrynoresiefe phosphate, dicresinofefe phosphate, etinolefefenofefe phosphate , Getinolefeninolepheninole phosphate, propinolephene-norezife-nolephosphate, dipropinolephene-norefe-norephosphate, trietinolefeninolephosphate , Triprop
- Examples of the acidic phosphate include 2-ethylhexyl acid phosphate, ethyl acid phosphate, butyl acid phosphate, oleyl acid phosphate, tetracosyl acid phosphate, isodecyl acid phosphate, and lauryl acid phosphate.
- Examples include sulfate, tridecyl acid phosphate, stearyl acid phosphate, isostearyl acid phosphate, and the like.
- phosphite examples include triethyl phosphite, tributyl phosphite, triphenyl phosphite, tricresyl phosphite, tri (norphenyl) phosphite, tri (
- 2-ethylhexyl) phosphite tridecyl phosphite, trilauryl phosphite, triisooctyl phosphite, diphenyl isodecyl phosphite, tristearyl phosphite, trioleyl phosphite, etc. .
- acidic phosphite examples include dibutyl hydrogen phosphite, diaryl hydrogen phosphite, dioleyl hydrogen phosphite, distearyl hydride mouth phosphite, and diphenyl hydrogen phosphite.
- amines which form an amine salt with these include, for example, those represented by the general formula (XVII)
- R 52 is an alkyl group or alkenyl group having 3-30 carbon atoms, preferably 418 carbon atoms, an aryl group or an arylalkyl group having 6-30 carbon atoms, preferably 6-15 carbon atoms) or the number of carbon atoms 2 30, preferably an hydroxyalkyl group having a carbon number of 2-18, h is 1, 2 or 3. also, if R 52 is plural, R 52 are either the same or different Good.
- the alkyl group or the alkyl group having 3 to 30 carbon atoms may be linear, branched, or cyclic.
- Examples of the mono-substituted amine include butylamine, pentylamine, hexylamine, cyclohexylamine, octylamine, laurylamine, stearylamine, oleylamine, benzylamine and the like.
- Disubstituted amines include dibutylamine, dipentylamine, dihexylamine, dicyclohexylamine, dioctylamine, dilaurylamine, distearylamine, dioleylamine, dibenzylamine, stearyl 'monoethanolamine, decyl' monoethanolamine, hexyl'monopropanol.
- Tri-substituted amines include tributylamine, tripentylamine, and trihexylamine. Lamine, tricyclohexylamine, trioctylamine, trilaurylamine, tristearyllamine, trioleylamine, tribenzylamine, dioleyl'monoethanolamine, dilauryl.monopropanolamine, dioctyl.monoethanolamine.
- the amount of these extreme pressure agents is usually about 0.01 to 30% by mass, and more preferably 0.01 to 10% by mass, based on the total amount of the composition, from the viewpoint of the effect of blending and economy.
- detergent and dispersant examples include metal sulfonates, metal salicylates, metal finates, and succinimides.
- the amount of these detergents and dispersants is usually about 0.1 to 30% by mass, and preferably 0.5 to 10% by mass, based on the total amount of the composition, from the viewpoint of the effect of blending.
- the compounding amount of these viscosity index improvers is usually about 0.5 to 35% by mass, preferably 1 to 15% by mass, based on the total amount of the lubricating oil, from the viewpoint of the compounding effect.
- antioxidants examples include metal sulfonates and succinic esters.
- the amount of these antioxidants is usually about 0.01 to 10% by mass, preferably 0.05 to 5% by mass, based on the total amount of the lubricating oil, from the viewpoint of the effect of the mixture.
- metal deactivator examples include benzotriazole and thiadiazole.
- the preferable compounding amount of these metal deactivators is usually about 0.01 to 10% by mass, and preferably 0.01 to 1% by mass, based on the total amount of the lubricating oil, from the viewpoint of the compounding effect.
- the antifoaming agent examples include methyl silicone oil, fluorosilicone oil, polyatalylate and the like. The amount of these defoamers is based on the total amount of In general, it is about 0.0005-0.01 mass%.
- base oils can be used in combination with the lubricating oil of the present invention as long as the object of the present invention is not impaired.
- a mineral oil or a synthetic oil can be appropriately selected.
- the mineral oil include distillates obtained by distilling a paraffinic base oil, an intermediate base oil or a naphthenic crude oil under normal pressure, or distilling an atmospheric distillation residue under reduced pressure, and distillates of these distillates.
- Refined oil obtained by refining the oil according to a conventional method specifically, a solvent refined oil, a hydrogenated refined oil, a dewaxed oil, a clay treated oil, and the like.
- Examples of synthetic oils include low-molecular-weight polybutene, low-molecular-weight polypropylene, ⁇ -olefin oligomers having 8 to 14 carbon atoms, hydrogenated products thereof, and polyol esters (for example, fatty acid esters of trimethylolpropane and pentaerythritol). Fatty acid esters, etc.), dibasic acid esters, aromatic polypropylene carboxylic acid esters (eg, trimellitate ester, pyromellitic acid ester, etc.), ester compounds such as phosphoric acid esters, and alkylaromatic compounds such as alkylbenzene and alkylnaphthalene.
- polyol esters for example, fatty acid esters of trimethylolpropane and pentaerythritol.
- Fatty acid esters, etc. dibasic acid esters, aromatic polypropylene carboxylic acid esters (eg, trimellitate ester, pyromellitic acid
- Examples include compounds, silicone oil, polyphenols, alkyl-substituted diphenyl ethers, polyether ethers, phosphazene compounds, and fluorinated oils (eg, fluorocarbon, perfluoropolyether, etc.).
- the amount of water admixed is preferably 3000 mass ppm or less based on the lubricating oil, more preferably 500 mass ⁇ pm or less, and particularly preferably 100 mass ppm or less. It is preferable to use a water-insoluble ionic liquid in order to make the water content of the lubricating oil 500 ppm by mass.
- the cationic surface is positively adsorbed on the friction surface, and the lubricating protective film is formed.
- the lubricating protective film With this lubricating protective film, lubricating oil characteristics such as friction characteristics can be controlled.
- the method of applying the electric field is as follows. (1) Fill the frictional points of the two lubricating materials sliding with each other with lubricating oil, and place the electrode in non-contact with the lubricating material across the frictional points.
- the applied voltage is usually about 0.1 to 5 x 10 6 mV, preferably 0.1 to 5 x 10 3 mV, more preferably 0.1 to 10 OmV from the viewpoint of safety, economy and applied effect. is there.
- the applied voltage may be DC or AC.
- a lubrication characteristic control device that controls lubrication characteristics in a contact region between two lubricated materials.
- This lubricating characteristic control device uses the lubricating oil of the present invention as a lubricating oil to be present in a contact area between two lubricated materials, and a pair of electrodes for applying an electric field to the lubricating oil sandwiches the contact area. It has a configuration in which the two lubricated materials are brought into non-contact or in contact with each other.
- the electric field path pattern is changed to that of one electrode. Make it to reach the other electrode through the contact area. Or, ensure that such a route pattern is dominant over other route patterns. Also, when the two lubricating materials are made of a conductive material, the electric field path pattern passes through one lubricating material, the contact area, and the other lubricating material sequentially from one electrode to the other electrode. To reach. Or ensure that such a route pattern is dominant over other route patterns.
- the lubrication characteristic control device of the present invention when a lubricating oil is filled in a contact region between two lubricated materials and an electric field is applied by a pair of electrodes, one lubricated material, a contact region, A path pattern that sequentially passes through the other lubricated material and reaches the other electrode is formed along with the other path patterns, and the magnitude of the voltage changes the internal shear stress of the lubricating oil in the lubrication region, resulting in a lubrication corresponding to a change in viscosity. A characteristic change is seen.
- Viscosity index It was measured in accordance with the “Kinematic viscosity test method for petroleum products” specified in JIS K2283.
- the temperature was raised at a rate of 10 ° CZmin, and the temperature at which the initial mass was reduced by 5% was measured. It can be said that the higher the 5% mass reduction temperature, the better the evaporation resistance and heat resistance.
- a 99.9% pure iron plate cut into strips was immersed in a 10 ml sample, left at 100 ° C for 3 hours, then the appearance of the iron plate was observed, and the mass before and after immersion was measured. The difference was determined.
- a friction test was performed with a ball-on-disk using a pin disk tester of CSEM.
- the test conditions were room temperature, a load of 20 N, a sliding speed of 0.5 mZs, and a test time of 30 minutes.
- the test piece used was SUJ-2 for both the ball and the disk.
- the average friction coefficient) and the wear scar diameter of the ball were determined. Was. It can be said that the smaller the average friction coefficient) and the diameter of the wear scar on the ball, the better the wear characteristics.
- the test conditions were 75 ° C, load 20N, frequency 1mm, sliding distance 5mm, and the test piece used was SUJ-2 for both ball and disk.
- the applied voltage is lOOmV Yes, the test piece used was SUJ-2 for both the pole and the disc.
- the applied voltage was 100 mV, and the average friction coefficient 5 minutes and 15 minutes after the start of the test was determined.
- the densities and molecular weights MW of the ionic liquids 1 to 4 were measured, and the respective ion concentrations were calculated from [density (g / cm 3 ) Z molecular weight MW (gZmol)] ⁇ 1000.
- ionic liquid :! Density of ⁇ 4, molecular weight MW, ionic liquid 1 is 1. 197.97 g Zmol, ionic liquid 2 is 1.453 g / cm 3 , 416.36 g /, mol, ionic liquid 3 is 1. 426. 40 g / mol, 'ion'
- Lubricating oils were prepared from the components shown in Table 1 and measured for the above characteristics. Table 1 shows the results.
- Ionic liquid 1 1-Ethyl-3-methylimidazolium tetrafluoroborate
- Ionic liquid 2 Butylpyridinium bis (trifluoromethanesulfonyl) imide
- Ionic liquid 3 N, N-Jetyl-N —Methyl (2-methoxyethyl) ammonium
- Ionic liquid 4 1-butyl-3-methylimidazolymtetrafluoroborate
- Poly ⁇ -olefin oligomer of 1-decene
- Polyol ester ester of trimethylolpropane with fatty acid having 8 or 10 carbon atoms
- Aromatic ester trinormaloctyl trimellitate
- Perfluoropolyether Solvat Solexis, Fomblin M03
- TCP Triclezinole phosphate DBDS: dipentzinoresinolified
- Toxicity Toxic substances that have a LD50 (rat, oral) of 30 to 300 mgZkg are classified as toxic substances in the Poisonous and Deleterious Substances Handling Law.
- the lubricating oils of Examples 1 to 5 have a flash point of 300 ° C or more despite having a low viscosity, and 5% by differential thermal analysis. It can be seen that the mass loss temperature is high and low vaporization and heat resistance are excellent. Further examples :! It can be seen that the lubricating oils of Nos. 5 to 5 are small in both the coefficient of friction and the diameter of the wear scar S and have excellent friction characteristics.
- ionic liquids having a total acid value exceeding lmgKOHZg as in Comparative Examples 1 and 7 are excellent in heat resistance and abrasion resistance, but are highly corrosive and are not suitable as lubricating oils for metal products. I can see that.
- Lubricating oils were prepared from the components shown in Table 2 and measured for the above characteristics. Table 2 shows the results.
- Ionic liquid 5 N, N-Jetyl-N-methyl (2-methoxyethyl) ammonium tetrato
- Ionic liquid 6 butylpyridinium bis (trifluoromethanesulfonyl) imide amine-based antioxidant: 4,4_dibutyldiphenylamine
- Lubricating oils were prepared from the components shown in Table 3 and measured for the above characteristics. Table 3 shows the results.
- Ionic liquid 3 N, N-Jetyl-1-N-methyl (2-methoxyethanol) ammonium bis (trifluoromethanesulfonyl) imide
- Amine antioxidant 4, 4-dibutyldiphenylamine
- TCP Triclezinole phosphate
- the lubricating oil of the present invention can be used for an internal combustion engine, a torque transmission device, a slide bearing, a rolling bearing, an oil-impregnated bearing, a fluid bearing, a compression device, a chain, a gear, a hydraulic and a vacuum pump, a clock component, a hard disk, a refrigerator, Suitable for rolling, drawing, rolling, forging, heat treatment, heat transfer, washing, shock absorbers, protection, brakes, sealing devices, aerospace equipment such as aircraft and satellites, etc. used.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP04792211A EP1672051B1 (en) | 2003-10-10 | 2004-10-08 | Use of an ionic liquid as a base oil of a lubricating oil composition |
JP2005514617A JP4982083B2 (ja) | 2003-10-10 | 2004-10-08 | 潤滑油 |
US10/570,666 US8318644B2 (en) | 2003-10-10 | 2004-10-08 | Lubricating oil |
KR1020067006746A KR101133867B1 (ko) | 2003-10-10 | 2004-10-08 | 윤활유 |
AT04792211T ATE542878T1 (de) | 2003-10-10 | 2004-10-08 | Verwendung einer ionischen flüssigkeit als basisöl einer schmierstoffzusammensetzung |
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JP2003352264 | 2003-10-10 | ||
JP2003-352264 | 2003-10-10 | ||
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JP2004125491 | 2004-04-21 | ||
JP2004129813 | 2004-04-26 | ||
JP2004-129813 | 2004-04-26 | ||
JP2004-229457 | 2004-08-05 | ||
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US (1) | US8318644B2 (ja) |
EP (1) | EP1672051B1 (ja) |
JP (1) | JP4982083B2 (ja) |
KR (1) | KR101133867B1 (ja) |
AT (1) | ATE542878T1 (ja) |
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- 2004-10-08 KR KR1020067006746A patent/KR101133867B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
KR101133867B1 (ko) | 2012-04-06 |
EP1672051A8 (en) | 2006-10-11 |
KR20060126950A (ko) | 2006-12-11 |
US8318644B2 (en) | 2012-11-27 |
ATE542878T1 (de) | 2012-02-15 |
EP1672051A1 (en) | 2006-06-21 |
EP1672051B1 (en) | 2012-01-25 |
US20070027038A1 (en) | 2007-02-01 |
JPWO2005035702A1 (ja) | 2007-11-22 |
EP1672051A4 (en) | 2008-06-04 |
JP4982083B2 (ja) | 2012-07-25 |
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