WO2006025253A1 - 流体軸受用潤滑油組成物 - Google Patents
流体軸受用潤滑油組成物 Download PDFInfo
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- WO2006025253A1 WO2006025253A1 PCT/JP2005/015425 JP2005015425W WO2006025253A1 WO 2006025253 A1 WO2006025253 A1 WO 2006025253A1 JP 2005015425 W JP2005015425 W JP 2005015425W WO 2006025253 A1 WO2006025253 A1 WO 2006025253A1
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
- C10M107/34—Polyoxyalkylenes
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- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/18—Ethers, e.g. epoxides
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- 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
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
- C10M2207/0406—Ethers; Acetals; Ortho-esters; Ortho-carbonates 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
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
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- 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
- C10M2209/1033—Polyethers, i.e. containing di- or higher polyoxyalkylene groups used as base material
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- 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
- C10M2209/1055—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only used as base material
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- 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
- C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
- C10M2209/1065—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only used as base material
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- 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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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
- C10M2215/082—Amides containing hydroxyl groups; Alkoxylated derivatives
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- 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
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
- C10M2219/106—Thiadiazoles
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/049—Phosphite
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- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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- C10N2040/14—Electric or magnetic purposes
- C10N2040/18—Electric or magnetic purposes in connection with recordings on magnetic tape or disc
Definitions
- the present invention relates to a lubricating oil composition for fluid bearings, and more specifically, has a low viscosity, a high viscosity index, excellent low-temperature fluidity, low evaporation, energy saving, and the like, and high-speed rotation
- the present invention relates to a lubricating oil composition for a fluid bearing suitable for a compact fluid bearing used in the above.
- rotating devices that drive magnetic disks and optical disks such as FD, MO, mini disk, compact disk, DVD, and hard disk.
- rotating devices that drive magnetic disks and optical disks such as FD, MO, mini disk, compact disk, DVD, and hard disk.
- Higher capacity, higher capacity, and higher speed are largely due to improvements in bearings that are indispensable for rotating equipment.
- Fluid bearings consisting of a sleeve and a rotating shaft that face each other via lubricating oil do not have ball bearings, so they are suitable for small size and light weight, as well as excellent quietness and economy.
- Demand for personal computers, audio equipment, visual equipment, mopile communication equipment, power-navigation, etc. will increase!
- Lubricating oils used in such hydrodynamic bearings have low viscosity even in the low temperature range, good low temperature fluidity, low viscosity reduction even in the high temperature range, and low evaporation. Sex is required.
- the lubricating oil for bearings used in automobile equipment is as high as 40 to 80 ° C and can be used without any problem in the temperature range.
- the low temperature fluidity and fluidity of lubricating oil for fluid bearings is good.
- having excellent viscosity characteristics such as low viscosity reduction in the region, low vaporization, energy saving (low power consumption), and heat resistance stability are desired.
- lubricants for hydrodynamic bearings have been used with base oils such as poly-olefin oil (PAO) and dioctyl sebacate (DOS).
- base oils such as poly-olefin oil (PAO) and dioctyl sebacate (DOS).
- PAO poly-olefin oil
- DOS dioctyl sebacate
- a mixture of a polyol ester oil obtained by reacting a fatty acid having 5 to 20 carbon atoms such as nonanoic acid or decanoic acid with a diester oil such as dioctyl adipate or dioctyl sebacate is used as a base oil.
- a fluid bearing lubricant for example, see Patent Document 1
- a fluid bearing lubricating oil using an ester of trimethylolpropane and at least two mixed acids of monovalent fatty acids having 4 to 8 carbon atoms as a base oil is disclosed (for example, see Patent Document 2).
- the fluid bearing lubricating oil using the above-mentioned polyol ester as the base oil does not necessarily sufficiently satisfy the above-mentioned required characteristics. For this reason, it has problems such as the possibility of corroding the metallic material that is hydrolyzed.
- Patent Document 1 JP 2001-279284 A
- Patent Document 2 JP-A-2004-91524
- the present invention has good low-temperature fluidity in addition to basic performance such as lubricity, deterioration stability, sludge generation prevention, wear prevention, and corrosion prevention. Even in high temperatures, there is little decrease in viscosity!
- a lubricating oil composition for a fluid bearing that has excellent viscosity characteristics such as cocoon, low evaporation, energy saving and heat stability, and is suitable for a compact fluid bearing used at high speed rotation. Is intended for
- the present invention has been completed based on strong knowledge.
- the present invention provides:
- a lubricating oil composition for hydrodynamic bearings
- R 1 represents a monovalent hydrocarbon group having 8 to 24 carbon atoms having a side chain
- R 2 represents a monovalent hydrocarbon group having 3 to 10 carbon atoms.
- R 3 and R 5 each represent a monovalent hydrocarbon group, R 4 represents a divalent hydrocarbon group, and at least one of R 3 , R 4 and R 5 has a side chain, Their total carbon number is 11 to 34.
- the lubricating oil composition for hydrodynamic bearings as described in (2) above which is a dietheric compound represented by (5) an ether compound having 11 to 34 carbon atoms and having at least one ether bond
- R 6 and R 8 are each a monovalent hydrocarbon group, R 7 is a divalent hydrocarbon group, n is an integer of 2 or 3, At least one of R 7 and R 8 has a side chain, and their total carbon number is 11 to 34.
- the lubricating oil composition for fluid bearings according to (2) above which is a tri- or tetraether compound represented by
- the volume resistivity is 1 X 10 10 ⁇ ⁇ cm or less.
- the low temperature fluidity is good, and it has excellent viscosity characteristics such as low viscosity reduction even in a high temperature range, and also has low evaporation, low energy consumption, and low heat resistance. It is possible to provide a lubricating oil composition for a fluid bearing that has qualitative properties and is suitable for a compact fluid bearing used at high speed rotation.
- the lubricating oil composition for hydrodynamic bearings of the present invention contains, as a base oil, an etheric compound having 11 to 34 carbon atoms having at least one ether bond in a ratio of 50 to LOO mass%. Cost.
- ether compound one having 1 to 4 ether bonds is preferred.
- general formula (I) the general formula (I)
- R 1 represents a monovalent hydrocarbon group having 8 to 24 carbon atoms having a side chain
- R 2 represents a monovalent hydrocarbon group having 3 to 10 carbon atoms.
- R 3 and R 5 each represent a monovalent hydrocarbon group, R 4 represents a divalent hydrocarbon group, and at least one of R 3 , R 4 and R 5 has a side chain, Their total carbon number is 11 to 34.
- R 6 and R 8 are each a monovalent hydrocarbon group, R 7 is a divalent hydrocarbon group, and n is 2 or Represents an integer of 3, and at least one of R 6 , R 7 and R 8 has a side chain, and their total carbon number is 11 to 34.
- a tri- or tetraether compound represented by the formula can be used.
- the compound represented by the general formula (III) is preferably a tetraether compound.
- the monovalent hydrocarbon group having a side chain having 8 to 24 carbon atoms represented by R 1 is a linear alkyl group or an alkenyl group.
- the position of the side chain is not particularly limited, and the alkyl group and the alkyl group have a monovalent or divalent aromatic hydrocarbon group or a saturated or unsaturated alicyclic hydrocarbon group. But, okay.
- a straight-chain alkyl group is particularly preferably a group having one or more alkyl groups in the side chain.
- R 1 examples include 2-ethylhexyl group, 2-propylheptyl group, 2-butyloxyl group, 2-pentylnor group, 2-hexyldecyl group, 2-heptylundecyl group, 2 —Otatildodecyl group, 2-nortridecyl group, 2-decyltetradecyl group, 3,5,5-trimethylhexyl group, 3,7-dimethyloctyl group, 3,3-jetylpentyl group, etc. Can do.
- R 2 having 3 to carbon atoms: L0
- An aryl group or an aralkyl group having 7 to 10 carbon atoms can be mentioned.
- R 2 examples include various propyl groups, various butyl groups, various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, various nonyl groups, various decyl groups, aryl groups, propylene.
- Nyl group various butenyl groups, various hexenyl groups, various otaenyl groups, various decel groups, cyclopentyl groups, cyclohexyl groups, cyclopentyl groups, cyclohexenyl groups, phenyl groups, tolyl groups, naphthyl groups , Benzyl group, phenethyl group, and the like.
- various propyl groups various butyl groups, various pentyl groups, various hexyl groups, Alkyl groups such as various heptyl groups, various octyl groups, various nonyl groups, and various decyl groups are preferable.
- the monoether compound represented by the general formula (I) is preferably one having 18 to 32 carbon atoms, more preferably having 20 to 30 carbon atoms, and particularly preferably having 22 to 27 carbon atoms. Better!/,.
- the monoether compound represented by the general formula (I) is prepared by a conventionally known method, for example, the following reaction formula (A) R 1 — OH + R 2 — X ⁇ Ri— O—R 2 ⁇ ⁇ ⁇ (A)
- the hydrocarbyl alcohol having 8 to 24 carbon atoms having a side chain represented by the general formula (IV) is obtained by a conventionally known method, for example, a gel reaction in which a primary alcohol is subjected to a bimolecular condensation reaction at high temperature and high pressure. Alternatively, it can be produced via an oxo synthesis method or an oligomerization reaction of dimer or more of ⁇ -olefin.
- At least one of the monovalent hydrocarbon group represented by R 5 and the divalent hydrocarbon group represented by R 4 has a side chain,
- the total carbon number of R 4 and R 5 is required to be 11 to 34.
- Examples of the monovalent hydrocarbon group represented by R 3 and R 5 include a linear alkyl group or an alkenyl group, or an alkyl group or a alkenyl group in the side chain of these alkyl group or alkenyl group. And a group having at least one cycloalkyl group or aryl group.
- the alkyl group and alkenyl group may have a monovalent or divalent aromatic hydrocarbon group or a saturated or unsaturated alicyclic hydrocarbon group.
- a linear alkyl group or a group having 6 to 12 carbon atoms having one or more alkyl groups in its side chain is particularly preferred.
- R 3 and R 5 may be the same or different from each other, but may be the same because of the ease of producing the diether compound represented by the general formula (II).
- R 3 and R 5 include octyl, nonyl, decyl, dodecyl, 2-ethylhexyl, 2-propylheptyl, 2-butyloctyl, 3, 5, 5— Trimethi Examples include a ruhexyl group and a 3,7-dimethyloctyl group.
- the divalent hydrocarbon group represented by R 4 is a linear alkylene group or alkylene group, or an alkylene group or alkylene group thereof.
- Examples include groups having at least one alkyl group, alkenyl group, cycloalkyl group or aryl group in the side chain of the group.
- the alkylene group and alkene group may have a divalent aromatic hydrocarbon group or a divalent saturated or unsaturated alicyclic hydrocarbon group.
- a linear alkylene group or a group having 2 to 10 carbon atoms having one or more alkyl groups in its side chain is particularly preferable.
- R 4 examples include ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, otatamethylene group, decamethylene group, propylene group, 3-methylpentylene group, 3, 3 Preferred examples include a jetylpentylene group and a 2,2dimethyltrimethylene group.
- the diether compound represented by the general formula (II) is preferably one having 18 to 32 carbon atoms, more preferably having 20 to 30 carbon atoms, and particularly preferably having 22 to 27 carbon atoms! /.
- the diether compound represented by the general formula (II) is a conventionally known method, for example, when R 3 and R 5 are the same, the following reaction formula (B)
- the alcohol having a side chain is a conventionally known method, for example, a gel reaction in which a primary alcohol undergoes a bimolecular condensation reaction at high temperature and high pressure. Or via an oxo synthesis method or an oligomerization reaction of ⁇ -olefin having a dimer or more.
- At least the monovalent hydrocarbon group represented by R 6 and R 8 and the divalent hydrocarbon group represented by R 7 are at least One has side chains, and the total carbon number of R 6 , R 7 and R 8 needs to be 11 to 34.
- Examples of the monovalent hydrocarbon group represented by R 6 and R 8 include a linear alkyl group or an alkenyl group, or an alkyl group or a alkenyl group in the side chain of the alkyl group or the alkenyl group. And a group having at least one cycloalkyl group or aryl group. In the case of having a side chain, the position of the side chain is not particularly limited.
- the alkyl group and alkenyl group may have a monovalent or divalent aromatic hydrocarbon group or a saturated or unsaturated alicyclic hydrocarbon group.
- a linear alkyl group or a group having 6 to 12 carbon atoms having one or more alkyl groups in its side chain is particularly preferred.
- R 6 and R 8 may be the same or different from each other, but are the same for ease of production of the tri- or tetraether compound represented by the general formula (III). It is preferable that
- R 6 and R 8 include octyl group, nonyl group, decyl group, dodecyl group, 2-ethylhexyl group, 2 propylheptyl group, 2 butyloctyl group, 3, 5, 5 to trimethyl.
- a xyl group, a 3,7-dimethyloctyl group, etc. can be mentioned.
- the divalent hydrocarbon group represented by R 7 is a linear alkylene group or alkylene group, or an alkylene group or alkylene group thereof.
- Examples include groups having at least one alkyl group, alkenyl group, cycloalkyl group or aryl group in the side chain of the group.
- the alkylene group and alkene group may have a divalent aromatic hydrocarbon group or a divalent saturated or unsaturated alicyclic hydrocarbon group.
- a linear alkylene group or a group having 2 to 10 carbon atoms having one or more alkyl groups in its side chain is particularly preferable.
- R 7 examples include ethylene group, trimethylene group, 2-methylethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, otatamethylene group, decamethylene group, propylene group, 3-methylpentylene.
- Preferred examples include a len group, a 3,3-jetylpentylene group, and a 2,2-dimethyltrimethylene group.
- the tri- or tetraether compound represented by the general formula (III) is preferably one having 18 to 32 carbon atoms, more preferably having 20 to 30 carbon atoms, and particularly preferably having 22 to 27 carbon atoms. Those are preferred.
- the tri- or tetraether compound represented by the general formula (III) is a conventionally known method, for example, when R 6 and R 8 are the same, the following reaction formula (C)
- a diol having a side chain can be produced by a conventionally known method, for example, by dimerizing propylene oxide.
- the above-mentioned monoether compound, diether compound, triether compound is used as the base oil so as to satisfy the desired characteristics required for the lubricating oil composition described below.
- Middle strength of compound and tetraether compound It is recommended to select one or more compounds as appropriate.
- the total content is selected in the range of 50 to L00% by mass.
- the total content of the monoether compound, diether compound, triether compound and tetraether compound selected compound is 50% by mass or more, a lubricating oil composition satisfying desired required characteristics is obtained for fluid bearings. be able to.
- the preferred content is 70 to: L00% by mass, more preferably 80 to: L00% by mass, and still more preferably 90 to: L00% by mass.
- other base oils are optionally added in an amount of 50% by mass or less, preferably 30% by mass or less, more preferably 20% by mass or less, as long as the effects of the present invention are not impaired. More preferably, it can be contained in a proportion of 10% by mass or less.
- Examples of other base oils include mineral oils, polyhydroolefin oils, and ester oils such as diesters and polyol esters.
- the lubricating oil composition of the present invention has a kinematic viscosity at a temperature of 100 ° C of 2.2 mm 2 Zs or more.
- the kinematic viscosity is 2.2 mm 2 Zs or more, it has good bearing rigidity even when used at high temperatures, can sufficiently support the rotating sleeve body, and has good durability.
- the upper limit of kinematic viscosity at 100 ° C is usually about 3.5 mm 2 Zs.
- the kinematic viscosity at a temperature of 20 ° C. is preferably 140 mm 2 Zs or less. If the kinematic viscosity is 140 mm 2 Zs or less, the lubricating performance can be sufficiently exhibited even in a low temperature environment. Furthermore, the lubricating oil composition of the present invention preferably has a viscosity index of 100 or more. When the viscosity index is 100 or more, it operates well even in a high temperature range and a low temperature range where the viscosity change due to temperature is small.
- the viscosity index is more preferably 120 or more, and particularly preferably 125 or more.
- the kinematic viscosity and the viscosity index are values measured according to JIS K2283. Furthermore, the pour point measured according to JIS K2265 is preferably 140 ° C or less.
- the lubricating oil composition of the present invention preferably has an evaporation loss of 1.5% by mass or less after heat treatment at 120 ° C. for 24 hours.
- the lubricating performance can be stably exhibited for a long time.
- the evaporation loss is more preferably 1.0% by mass or less.
- the evaporation loss is a value measured according to the thermal stability test of JIS C201.
- the lubricating oil composition of the present invention has various additives such as, for example, within a range where the effects of the present invention are not impaired.
- Antioxidants, lubricity improvers, conductive additives, antifungal agents, metal deactivators, antifoaming agents, viscosity index improvers, and the like can be included as desired.
- antioxidants examples include amine-based antioxidants, phenol-based anti-oxidants, and sulfur-based anti-oxidants.
- amine antioxidants include monoalkyl diphenylamines such as monooctyldiphenylamine and monoanoldiphenylamine, 4,4-1, dibutyldiphenylamine, 4,4'-dipentyl.
- Dialkyldiphenylamines such as diphenylamine, 4,4'-dihexyldiphenylamine, 4,4'-diheptyldiphenylamine, 4,4'-dioctyldiphenylamine, 4,4'-diino-diphenylamine, tetra Polyalkyldiphenylamines such as butyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetranonyldiphenylamine, ⁇ -naphthylamine, phenyl- ⁇ ⁇ -naphthylamine, butylphenol- ⁇ -naphth
- phenolic antioxidants examples include 2,6-di-tert-butyl-4-methylphenol, 2,6-ditert-butyl-4-ethylphenol, octadecyl-3- (3,5-ditert-butyl-4-hydroxyphenol) propionate.
- Monophenols such as 4,4'-methylenebis (2,6 di-tert-butylphenol), bisphenols such as 2,2,1-methylenebis (4-ethyl-6-tertbutylphenol), etc. .
- Sulfuric acid compounds include phenothiazine, pentaerythritol-tetrakis (3-laurylthiopropionate), bis (3,5-ditert-butyl-4-hydroxybenzyl) sulfide, thiojetylene bis ( 3- (3,5-di-tert-butyl-4-hydroxyphenyl)) propionate, 2,6-di-tert-butyl-4 (4,6 bis (octylthio) —1, 3, 5 triazine-2-methylamino) phenol Can be mentioned.
- the antioxidants may be used singly or in combination of two or more.
- phenol-based and Z- or amine-based antioxidation agents are suitable.
- the preferred blending amount of these anti-oxidation agents is in the range of 0.01 to 10% by mass, particularly preferably in the range of 0.03 to 5% by mass based on the total amount of the composition.
- lubricating oil improver an oily agent or a friction modifier can be used.
- oily agent examples include aliphatic saturated and unsaturated monocarboxylic acids such as stearic acid and oleic acid, polymerized fatty acids such as dimer acid and hydrogenated dimer acid, hydroxy fatty acids such as ricinoleic acid and 12-hydroxystearic acid, Aliphatic saturated and unsaturated monoalcohols such as lauryl alcohol and oleyl alcohol, aliphatic saturated and unsaturated monoamines such as stearylamine and oleylamine, aliphatic saturated and unsaturated monocarboxylic acids such as lauric acid amide and oleic acid amide Examples include amides.
- a preferable blending amount of these oil-based agents is in the range of 0.01 to L0% by mass based on the total amount of the composition, and a range of 0.1 to 5% by mass is particularly preferable.
- friction modifiers those generally used as extreme pressure agents can be used, and in particular, phosphate esters, amine salts of phosphate esters, and sulfur-based extreme pressure agents. I can get lost.
- phosphate esters examples include phosphate esters, acid phosphate esters, phosphite esters, and acid phosphite esters represented by the following general formulas (X) to (XIV).
- ⁇ R 11 is an alkyl group having 4 30 carbon atoms
- Aruke - group is an alkyl ⁇ aryl group and ⁇ reel alkyl group
- R 9 R U is either the same or different May be.
- phosphate esters include triaryl phosphates, trialkyl phosphates, trial quinolaleolinole phosphates, triaryl alkyl phosphates, trianolenokenino phosphates, and examples include triphenyl phosphate, tricresyl phosphate, benzyl Diphenylenophosphate, ethinoresinenophosphate, tributynophosphate, eth Noresbutinorephosphate, Cresinorephie-Norephosphate, Dicresinorefe-Norephosphate, Echinenolefeninoresifeninorephosphate, Jetinorefeninorefeninorefoate, Propinorefenore-Norefosephenophosphate Tritino fenenole phosphate, Tripropino fenenore phosphate, Butino fenenore diphenol phosphate, Di
- Examples of the acidic phosphate ester include 2-ethylhexyl acid phosphate, ethyl acid phosphate, butyl acid phosphate, oleyl acid phosphate, tetracosyl acid phosphate, isodecyl acid phosphate, lauryl acid phosphate, Examples include tridecyl acid phosphate, stearyl acid phosphate, and isostearyl acid phosphate.
- phosphites examples include triethyl phosphite, tributyl phosphite, triphenyl phosphite, tricresyl phosphite, tri (norphenyl) phosphite, tri (2-ethylhexyl) phosphite. , Tridecyl phosphite, trilauryl phosphite, triisooctyl phosphite, diphenylisodecyl phosphite, tristearyl phosphite, trioleyl phosphite and the like.
- Examples of the acidic phosphite include dibutyl hydrogen phosphite, dilauryl hydrogen phosphite, dioleyl hydrogen phosphite, distearyl hydride mouth phosphite, diphenyl hydrogen phosphite and the like. it can. Of the above phosphoric acid esters, tricresyl phosphite and triphenyl phosphate are preferred.
- amines that form amine salts with these include, for example, the general formula (XV) R 12 -NH ⁇ ⁇ ⁇ ⁇ (XV)
- R 12 represents an alkyl or alkyl group having 3 to 30 carbon atoms, an aryl or alkyl group having 6 to 30 carbon atoms, or a hydroxyalkyl group having 2 to 30 carbon atoms.
- P represents 1, 2 or 3. Also, if R 12 is plural, R 12 may be the same or different.
- the alkyl group or alkenyl group having 3 to 30 carbon atoms of R 12 in the general formula (XV) may be any of a straight chain, a branched chain, and a cyclic group.
- Examples of mono-substituted amines include butylamine, pentylamine, hexylamine, cyclohexylamine, octylamine, laurylamine, stearylamine, oleylamine, benzylamine, and examples of disubstituted amines include dibutylamine.
- the sulfur-based extreme pressure agent may be any one having a sulfur atom in the molecule and capable of exhibiting extreme pressure properties and excellent friction characteristics by being dissolved or uniformly dispersed in a lubricating base oil. .
- sulfurized fats and oils examples include sulfurized fats and oils, sulfurized fatty acids, sulfurized esters, sulfurized olefins, dihydrocarbyl polysulfides, thiadiazole compounds, thiophosphoric acid esters (thiophosphite, thiophosphate), alkylthio-powered rubamoyl compounds, And o-carbamate compounds, thioterpene compounds, dialkylthiodipropionate compounds, and the like.
- sulfurized fats and oils are obtained by reacting sulfur and sulfur-containing compounds with fats and oils (lard oil, whale oil, vegetable oil, fish oil, etc.), and the sulfur content is not particularly limited.
- sulfurized lard sulfurized rapeseed oil
- sulfurized castor oil sulfurized soybean oil
- sulfurized rice bran oil sulfurized rice bran oil
- sulfur fatty acid examples include sulfur oleate
- sulfur ester examples include methyl sulfate oleate and sulfur gluten free fatty acid octyl.
- R 13 represents a C 2-15 alkyl group
- R 14 represents a C 2-15 alkyl group or a alk group
- q represents an integer of 1-8.
- This compound is obtained by reacting olefins having 2 to 15 carbon atoms or dimers or tetramers thereof with a sulfurizing agent such as sulfur, chlorosulfur yellow, etc., and examples of the olefin include propylene, isobutene, diisobutene. Etc. are preferable.
- R 15 and R 16 are each an alkyl group having 1 to 20 carbon atoms or a cyclic alkyl group, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, or 7 to 20 carbon atoms. And they may be the same or different from each other, r represents an integer of 1 to 8.
- R 15 and R 16 are alkyl groups, they are called alkyl sulfides.
- R 15 and R 16 are methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, 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, furyl groups, naphthyl groups, tolyl groups, xylyl groups Group, benzyl group, phenethyl group, etc.
- the above general formula (XVII) R 15 and R 16 are methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, Various pent
- dihydrocarbyl polysulfide examples include dibenzyl polysulfide, various dinor polysulfides, various didodecyl polysulfides, various dibutyl polysulfides, various dioctyl polysulfides, diphenyl polysulfide, dicyclohexyl polysulfide, and the like. Can do.
- R 17 and R 18 each represent a hydrogen atom and a hydrocarbon group having 120 carbon atoms, and f and g each represents an integer of 0 8.
- 1, 3, 4 thiazonozore, 1, 2, 4 thiadiazonole compound, 1,4,5-thiadiazole and the like are preferably used.
- thiadiazole compounds examples include 2,5 bis (n xyldithio) 1,3,4-thiadiazole, 2,5 bis (n-octyldithio) 1,3,4-thiadiazole, 2,5 bis (n-no- 1,3,4-thiadiazole, 2,5 bis (1,1,3,3-tetramethylbutyldithio) 1,3,4-thiadiazole, 3,5 bis (n xyldithio) 1,2,4 -Thiadiazole, 3,5 bis (n-octyldithio) 1,2,4-thiadiazole, 3,5 bis (n-nordithio) 1,2,4-thiadiazole, 3,5 bis (1, 1, 3, 3 —Tetramethylbutyldithio) 1, 2, 4-thiadiazole, 4 , 5 bis (n-hexyldithio) 1, 2, 3 thiadiazole, 4, 5 bis (n-octyldithio) 1, 2, 3 thiadiazole,
- thiolic acid esters examples include alkyl trithiophosphite, aryl or alkyl arylthiophosphate, zinc dilauryl dithiophosphate, and lauryl trithiophosphite and triphenylthiophosphate are particularly preferred! /.
- alkylthio-powered rubermoire compound examples include, for example, the following general formula (XIX) [0039] [Chemical Formula 3]
- R 19 to R 22 each represent an alkyl group having 1 to 20 carbon atoms, and h represents an integer of 1 to 8.
- alkylthio-powered rubermoyl compounds include bis (dimethylthio-powered rubermoyl) monosulfide, bis (dibutylthio-powered rubermoyl) monosulfide, bis (dimethylthio-powered rubermoyl) disulfide, bis (dibutylthio-powered rubermoyl) disulfide, and bis (diamilthio-powered rubermoyl).
- Disulfide, bis (dioctylthio-rubamoyl) disulfide and the like can be preferably mentioned.
- thiocarbamate compound for example, a zinc dialkyldithiocarbamate
- thioterpene compound for example, a reaction product of phosphorus pentasulfide and pinene
- dialkylthiodipropionate is used as the compound.
- dilaurylthiodipropionate, distearylthiodipropionate and the like can be mentioned.
- thiadiazole compounds and benzyl sulfide are preferred from the viewpoints of extreme pressure properties, friction characteristics, thermal acid stability, and the like.
- a preferable blending amount of these friction modifiers is in a range of 0.01 to: LO mass% based on the total amount of the composition, and a range of 0.05 to 5 mass% is particularly preferable.
- the lubricating oil composition of the present invention is substantially in the absence of metal particles or metal oxide particles.
- the volume resistivity is preferably 1 ⁇ 10 10 ⁇ ′cm or less.
- volume resistivity is less than 1 X 1 ⁇ 10 ⁇ 'cm, lubricating oil compositions have good antistatic properties.
- the lower limit of the volume resistivity is not particularly limited, but is usually about 1 ⁇ 10 7 ⁇ ′cm.
- the volume resistivity is a value measured according to JIS C2102.
- the lubricating oil composition of the present invention in order to make the volume resistivity below 1 X 1 ⁇ 10 ⁇ 'cm, can contain a conductive additive.
- amine derivatives succinic acid derivatives, poly (oxyalkylene) glycols or partial esters of polyhydric alcohols, which are non-metallic antistatic agents, are preferred.
- the content is preferably 0.01 to 10% by mass based on the total amount of the composition.
- poly (oxyethylene) alkylamine of the following formula (wherein R 23 is an alkyl group having 1 to 18 carbon atoms),
- a force such as a reaction condensate using a polyethyleneimine such as tetraethylenepentamine (TEPE) and a fatty acid is preferable.
- TEPE tetraethylenepentamine
- a reaction condensate of TEPE and stearic acid is preferable.
- preferred examples of the succinic acid derivative include polybutenyl succinimide, and the poly (oxyalkylene) glycol is a compound represented by the following general formula (XX). Or a mixture of these.
- R 25 and R 29 each independently represent hydrogen, an alkyl group having 1 to 24 carbon atoms, a phenyl group, or an alkylaryl group having 7 to 24 carbon atoms
- R 26 , R 27 and R 28 each independently represents an alkylene group having 2 to 18 carbon atoms
- d, e and f each independently represents a number of 0 to 50, and the sum of d to f is 9 to 50.
- R 26 — 0), (R 27 — O) and (R 28 — O) may be the same or different for each structural unit.
- poly (oxyethylene) alkyl ether examples include poly (oxyethylene) alkyl ether
- Etc. are more preferable.
- sorbitan fatty acid esters represented by the following formulas such as sorbitan monooleate and sorbitan diolate
- R 33 is an alkyl group having 1 to 18 carbon atoms, n and m are each a number of 1 to 10),
- Glycerin fatty acid ester represented by the following formula such as glycerol monooleate and glycerol dioleate Stealth
- R 34 is an alkyl group having 1 to 18 carbon atoms, n and m are each a number of 1 to 10),
- partial ester compounds of polyhydric alcohols such as neopentyl glycol, trimethylolpropane, pentaerythritol and fatty acids having 1 to 24 carbon atoms.
- fungicide examples include, for example, alkyl or alk-succinic acid derivatives, sorbitan monooleate, glycerol Polyalcohol partial esters such as monoeleate and pentaerythritol monooleate, amines such as rosinamine and N oleylsarcosine, and dialkyl phosphiteamine salts can be used.
- the preferred blending amount of these fungicides is in the range of 0.01 to 5% by mass, particularly preferably in the range of 0.05 to 2% by mass, based on the total amount of the composition.
- metal deactivator for example, benzotriazole-based, thiadiazole-based, gallic acid ester-based compounds, and the like can be used.
- a preferable blending amount of these metal deactivators is 0.01 to 0.4% by mass based on the total amount of the composition, and a range of 0.01 to 0.2% by mass is particularly preferable.
- liquid silicone is suitable, and for example, methylsilicone, fluorosilicone, and polyacrylate can be used.
- a preferable blending amount of these antifoaming agents is 0.0005-0.01% by mass based on the total amount of the composition.
- viscosity index improvers examples include olefin copolymers such as polyalkylmetatalylate, polyalkylstyrene, polybutene, ethylene-propylene copolymer, styrene-gen copolymer, and styrene-maleic anhydride ester copolymer. It is. A preferable blending amount of these viscosity index improvers is 0.1 to 15% by mass based on the total amount of the composition, and a range of 0.5 to 7% by mass is particularly preferable.
- the lubricating oil composition for hydrodynamic bearings of the present invention is suitably used for hydrodynamic bearings used in rotating devices that drive magnetic disks and optical disks, such as FD, MO, minidisks, compact disks, DVDs, and hard disks.
- the copper catalyst is C1100P, a material specified by JIS H3100, with a size of 13 X 51 X lm m.
- the glass bottle rotation method is performed by rotating at 5 rpm in the direction of turning upside down once during one rotation. It was.
- reaction mixture was transferred to a separatory funnel, the aqueous phase was filtered off, and the remaining organic phase was washed 5 times with 500 ml of water.
- 2-Hexyldecyl decyl ether was separated from the organic phase by distillation under reduced pressure.
- branched eicosanol obtained from dicene dicene and 2-hexyldecanol obtained by gel reaction
- 2-octyldodecanol obtained by gel reaction
- 2-octyldodecanol obtained by a similar reaction.
- Production Example 2 Obtained 2-Hexyldecyl Noryl Ether, 2-Otyldodecyl Pentyl Ether, 2-Otyldodecyl Hexyl Ether
- reaction mixture was transferred to a separatory funnel, the aqueous phase was filtered off, and the remaining organic phase was washed 5 times with 500 ml of water.
- reaction mixture was transferred to a separatory funnel, the aqueous phase was filtered off, and the remaining organic phase was washed 5 times with 200 ml of water.
- Table 1 shows the characteristics of various lubricant base oils such as kinematic viscosity, viscosity index, pour point, and evaporation loss.
- N102TPG Tri (1,2-propylene glycol) didecyl ether
- NPG— C8 diester of neopentyl glycol and octanoic acid
- Comparative Example 1 the kinematic viscosity at ⁇ 20 ° C. is extremely high. In Comparative Example 2, the evaporation loss is large. Further, as shown in Table 2, the comparative example is inferior in hydrolyzability to the comparative example as compared to the example. Furthermore, as shown in Table 3, the volume resistivity of Example 16 is low.
- the lubricating oil composition for hydrodynamic bearings of the present invention comprises a compound selected from a specific monoether compound, diether compound, triether compound and tetraether compound as a base oil. It has low viscosity, high viscosity index, excellent low temperature fluidity, low evaporation and energy saving, and is suitable for compact fluid bearings used at high speed rotation.
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Abstract
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2005
- 2005-08-25 CN CNA2005800284835A patent/CN101006164A/zh active Pending
- 2005-08-25 WO PCT/JP2005/015425 patent/WO2006025253A1/ja active Application Filing
- 2005-08-25 US US11/574,321 patent/US20070281873A1/en not_active Abandoned
- 2005-08-25 JP JP2006531975A patent/JPWO2006025253A1/ja active Pending
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JP2002348586A (ja) * | 2001-05-23 | 2002-12-04 | Citizen Watch Co Ltd | 潤滑油組成物およびそれを用いた精密部品および軸受け |
WO2004058928A1 (ja) * | 2002-12-24 | 2004-07-15 | Idemitsu Kosan Co., Ltd. | 潤滑油基油及び潤滑油組成物 |
WO2004090082A1 (ja) * | 2003-04-02 | 2004-10-21 | Idemitsu Kosan Co., Ltd. | 導電性潤滑油組成物 |
JP2005232434A (ja) * | 2004-01-21 | 2005-09-02 | New Japan Chem Co Ltd | 軸受用潤滑油 |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007204451A (ja) * | 2006-02-03 | 2007-08-16 | Idemitsu Kosan Co Ltd | ポリエーテル化合物及びそれを含む潤滑油用基油と潤滑油組成物 |
JP2013534218A (ja) * | 2010-08-05 | 2013-09-02 | コグニス・アイピー・マネージメント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 化粧品調製物 |
US9365789B2 (en) | 2012-12-27 | 2016-06-14 | Idemitsu Kosan Co., Ltd. | Dialkyl ether, and lubricant base oil and lubricating oil composition containing the same |
JP5677631B2 (ja) * | 2012-12-27 | 2015-02-25 | 出光興産株式会社 | ジアルキルエーテル、並びにそれを含む潤滑油基油及び潤滑油組成物 |
JPWO2014104174A1 (ja) * | 2012-12-27 | 2017-01-12 | 出光興産株式会社 | ジアルキルエーテル、並びにそれを含む潤滑油基油及び潤滑油組成物 |
WO2015098760A1 (ja) * | 2013-12-27 | 2015-07-02 | 出光興産株式会社 | ジアルキルエーテルを含む潤滑油基油 |
JP2015124341A (ja) * | 2013-12-27 | 2015-07-06 | 出光興産株式会社 | ジアルキルエーテルを含む潤滑油基油 |
US9920274B2 (en) | 2015-02-09 | 2018-03-20 | Moresco Corporation | Lubricant composition, use thereof and aliphatic ether compound |
JP2018517749A (ja) * | 2015-06-18 | 2018-07-05 | カストロール リミテッド | エーテル化合物ならびに関連の組成物および方法 |
JP2021020920A (ja) * | 2015-06-18 | 2021-02-18 | カストロール リミテッド | エーテル化合物ならびに関連の組成物および方法 |
JP2020502339A (ja) * | 2016-12-16 | 2020-01-23 | カストロール リミテッド | エーテルベースの潤滑剤組成物、製法および使用 |
JP2020502338A (ja) * | 2016-12-16 | 2020-01-23 | カストロール リミテッド | エーテルベースの潤滑剤組成物、方法および使用 |
JP7090085B2 (ja) | 2016-12-16 | 2022-06-23 | カストロール リミテッド | エーテルベースの潤滑剤組成物、製法および使用 |
JP7107938B2 (ja) | 2016-12-16 | 2022-07-27 | カストロール リミテッド | エーテル系の潤滑剤組成物、方法および使用 |
WO2023038045A1 (ja) * | 2021-09-10 | 2023-03-16 | Jnc株式会社 | 潤滑油基油およびポリエーテル化合物 |
Also Published As
Publication number | Publication date |
---|---|
US20070281873A1 (en) | 2007-12-06 |
CN101006164A (zh) | 2007-07-25 |
JPWO2006025253A1 (ja) | 2008-05-08 |
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