WO2005093024A1 - 無段変速機用潤滑油組成物 - Google Patents
無段変速機用潤滑油組成物 Download PDFInfo
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- WO2005093024A1 WO2005093024A1 PCT/JP2005/005886 JP2005005886W WO2005093024A1 WO 2005093024 A1 WO2005093024 A1 WO 2005093024A1 JP 2005005886 W JP2005005886 W JP 2005005886W WO 2005093024 A1 WO2005093024 A1 WO 2005093024A1
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- lubricating oil
- variable transmission
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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
- 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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- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/04—Well-defined cycloaliphatic compounds
- C10M2203/045—Well-defined cycloaliphatic compounds used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic fractions used as base material
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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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
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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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- 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
- C10M2219/046—Overbasedsulfonic acid salts
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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
- 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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- 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
- 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
- C10M2223/043—Ammonium or amine salts thereof
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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
- 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
- C10M2223/047—Thioderivatives not containing metallic elements
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/045—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for continuous variable transmission [CVT]
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
- C10N2060/14—Chemical after-treatment of the constituents of the lubricating composition by boron or a compound containing boron
Definitions
- the present invention relates to a lubricating oil composition for a continuously variable transmission, and more particularly, to a traction drive type continuously variable transmission as well as a metal belt type continuously variable transmission and a chain type continuously variable transmission.
- the present invention relates to a lubricating oil composition for a continuously variable transmission, which can be used for a transmission.
- CVTs continuously variable transmissions
- metal belt type a chain type
- traction drive type a continuously variable transmissions
- the power that requires a high power transmission capacity depends on the characteristics of the lubricating oil used, specifically, the friction coefficient between metals or the magnitude of the traction coefficient! Therefore, both of these coefficients are large, and the larger the coefficient, the larger the power transmission capacity.
- the lubrication state of the power transmission surface (metal contact surface) of these CVTs is considered to be a mixed lubrication state in which elastohydrodynamic lubrication (EHL) and boundary / extreme pressure lubrication are mixed.
- EHL elastohydrodynamic lubrication
- the chain type CVT is mainly under boundary / extreme pressure lubrication, and the main characteristic is the friction coefficient between metals.
- these CVT lubricating oils have conventionally used paraffinic mineral oils and hydrocarbon compounds such as polyalphaolefin (PAO) as base oils and compounded additives to adjust the friction coefficient between metals. .
- PAO polyalphaolefin
- the conventional traction drive type CVT whose power is transmitted through the EHL oil film, has a traction coefficient as its main characteristic.
- a synthetic naphthenic compound having a high traction coefficient as a base oil is used. Has been used.
- dedicated lubricating oil was used for each type of CVT (for example, see Patent Documents 1 and 2).
- metal belt type CVTs and chain type CVTs have a low traction coefficient. Furthermore, when the power transmission surface wears due to friction, the shape of the friction surface changes, and the As a result of changing the lubrication state of the surfaces and the like, the friction coefficient between metals decreased, and the desired power transmission became impossible, and the CVT function could not be exhibited.
- Patent Document 1 JP-A-9100487
- Patent Document 2 JP 2001-288488 A
- the present invention has been made under such a circumstance, and the power transmission capacity of each type of CVT such as a metal belt type, a chain type, and a traction drive type has been improved, and the power transmission capacity has been improved. It is an object of the present invention to provide a lubricating oil composition for a continuously variable transmission that can maintain the above conditions.
- the present inventors have found that adjusting the cohesive energy density of a base oil to a certain value or more has the effect of increasing and maintaining the intermetallic friction coefficient of an additive. Have a high traction coefficient.
- the present invention has been completed based on powerful knowledge.
- the present invention provides:
- a base oil composed of a hydrocarbon compound having a cohesive energy density of 0.180 GPa or more at 40 ° C and having a kinematic viscosity of 5 to 150 mm 2 / s at 40 ° C,
- the base oil according to the above (1) or (2) which is a base oil containing one or a combination of two or more selected from alkane derivatives each having one or more decalin rings and one or more cyclohexyl rings.
- Lubricating oil composition for a step transmission is a base oil containing one or a combination of two or more selected from alkane derivatives each having one or more decalin rings and one or more cyclohexyl rings.
- r represents 0 or 1
- A is a hydroxyl group
- A is a hydrogen atom or a hydroxyl group
- R 7 and R 8 are each a hydrogen atom or one
- Allyl least one of R 7 tR S is a hydrocarbon group containing an Chio ether bond.
- the lubricating oil composition for a continuously variable transmission according to any one of the above (1) to (3), which is an acidic phosphate or phosphite represented by
- the phosphoric ester of (C) and its amine salt are a phosphoric ester having an alkyl group having 3 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, and amine salts thereof.
- the overbased calcium sulfonate of (C) has a base number of 50 to 700 mg KOHZg, wherein the lubricating oil composition for a continuously variable transmission according to any one of (1) to (5),
- the lubricating oil composition for a continuously variable transmission according to any one of (1) to (6), further comprising (D) a sulfur-based antiwear agent.
- the friction coefficient at the contact surface such as a metal belt type CVT, a chain type CVT, and a traction drive type CVT is high, and the wear resistance is excellent.
- a CVT is a lubricating oil composition for a continuously variable transmission that has a large power transmission capacity and enhances its durability.
- the lubricating oil composition for a continuously variable transmission according to the present invention is a lubricating oil composition for a universal continuously variable transmission applicable to various types of CVTs.
- the base oil used as the component (A) of the present invention has a cohesive energy density at 40 ° C (hereinafter may be abbreviated as "CED") of at least 180 GPa, preferably at least 200 GPa. It is a base oil composed of a hydride compound. CED force at 40 ° C O. If it is 180 GPa or more, the base oil itself has a high traction coefficient. As a result, the power transmission capacity of the transmission can be increased and its sustainability can be increased.
- CED cohesive energy density at 40 ° C
- d is the density at 40 ° C (g / cm 3 )
- MW is the molecular weight (g / mol)
- T is the absolute temperature (K)
- the kinematic viscosity at 40 ° C. of the base oil as the component (A) of the present invention is 5 to 150 mm 2 / s, preferably 8 to 50 mm 2 / s. If the kinematic viscosity at 40 ° C is 5 mm 2 / s or more, wear of various mechanical elements such as CVT and gears and bearings constituting the CVT unit can be suppressed, and the kinematic viscosity at 40 ° C is 150 mm 2 / s. If it is less than or equal to s, there is no danger that the cold startability will deteriorate.
- base oil which is the component (A) of the present invention
- various kinds of base oils can be used without particular limitation as long as the above conditions are satisfied, and preferred are synthetic alicyclic (cyclic saturated) hydrocarbons.
- synthetic alicyclic hydrocarbon compound used herein means a naphthene compound or a condensed ring compound, and examples thereof include the following.
- Alkane derivatives having at least one decalin ring and at least one cyclohexyl ring
- R 1 and!? 2 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- R 3 represents a methylene group, an ethylene group or a trimethylene group which may be substituted by a methyl group in a side chain.
- N is 0 or 1
- p and q are each an integer of 1 to 3
- p + q is 4 or more. It is an integer below.
- R 1 and R 2 are each a hydrogen atom or an alkyl group having 1 to 3 carbon atoms (methyl group, ethyl group, ⁇ -propyl group, i— R 3 represents a methylene group, an ethylene group, a trimethylene group, or those in which a methyl group is substituted on these side chains (for example, an ethylidene group, a methylethylene group, etc.), and p and q each represent It is an integer of 1 to 3, and p + q is an integer of 4 or less.
- Such a compound can be obtained by various methods, and its production method is not particularly limited. However, usually, it is necessary to dimerize norbornanes and Z or norbornenes and further hydrogenate them. Thus, it can be manufactured.
- R 4 , R 5 and!? 6 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and more preferably, R 4 , R 5 and R 6 each represent a hydrogen atom or a methyl group. Is shown. M is 1 or 2.
- norbornanes include alknornorbornane, methylene norbornane, ethylidene norbornane, isopropylidene norbornane, isopropylidene norbornane, 3-methyl-2-methylene norbornane, and butyl norbornane, isopropyl norbornane, and the like. Examples include alkylidene norbornane such as 3-dimethyl-2-methylene norbornane. Preferred norbornenes are represented by the general formula
- norbornenes include norbornene, alkyl norbornene such as methyl norbornene, ethyl norbornene, isopropyl norbornene, dimethyl norbornene, alkanol norbornene such as butyl norbornene, isopropyl norbornene, and methylene norbornene. , Ethylidene norbornene, isopropylidene norbornene and the like.
- Preferred specific examples of these (i) and (ii) include 2-methyl 3-methyl 2-[(3-methylbicyclo [2.2.1] hept-2-yl) methyl] bicyclo [2.2 . 1] heptane.
- alkane derivative (m) having two or more cyclohexane rings examples include: Examples include 2,4-dicyclohexyl-2-methylpentane and 2,4-dicyclohexylpentane.
- alkane derivative having at least one decalin ring and at least one cyclohexyl ring in (iv) include, for example, 1-cyclohexyl-1-decalyl ethane.
- the traction coefficient is also high.
- the CED at 40 ° C and the traction coefficient at 100 ° C are as shown in Table 1.
- CED is a value obtained by the above equation (1), and the traction coefficient is measured by an experimental method (Experiment III) in an embodiment described later.
- Base oil example 4 Base oil l (75RJlW) + polyalphaolefin (25 lean 3 ⁇ 4>)
- Base oil example 5 1-Cyclohexyl-11-decalylethane
- Base oil example 6 Base oil «5 (75
- the base oil as the component (A) of the present invention only the above-mentioned synthetic alicyclic (cyclic saturated) hydrocarbon compound may be used, or a mineral oil or a chain hydrocarbon compound may be mixed therewith.
- mineral oils include noffine mineral oils and naphthenic mineral oils
- chain hydrocarbon compounds include, for example, polyalphaolefin.
- the mixing ratio of these mineral oils and chain hydrocarbon compounds is not particularly limited as long as the CED of the base oil at 40 ° C is 0.180 GPa or more, but is usually 50% by volume or less based on the base oil. It is preferable to mix in the range.
- the base oil as the component (A) includes one or more selected component (B) and / or component (C) described below.
- the component (B) in the present invention is a phosphate having a hydrocarbon group containing a thioether bond.
- This phosphate ester is not particularly limited, for example, the compound represented by the general formula (II)
- hydrocarbon group having 18 to 18 carbon atoms examples include a linear or branched alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 18 carbon atoms, and a linear or branched alkyl group having 2 to 18 carbon atoms.
- alkyl group having 1 to 18 carbon atoms examples include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, Examples include hexyl, octyl, 2-ethylhexyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl and the like.
- Examples of the cycloalkyl group having 3 to 18 carbon atoms include a cyclopentyl group, a cyclohexyl group, a methylcyclohexyl group, and a cyclooctyl group.
- Examples of the alkenyl group having 2 to 18 carbon atoms include an aryl group, a propenyl group, a butenyl group, an otathenyl group, a decenyl group and an oleyl group.
- Examples of the aryl group having 6 to 18 carbon atoms include phenyl, tolyl, xylyl, and naphthyl groups.
- Examples of the aralkyl group having 7 to 18 carbon atoms include benzyl, phenethyl, and naphthyl. And a methyl group.
- hydrocarbon groups having 1 to 18 carbon atoms one or more thioether bonds are contained.
- hydrocarbon groups are hexylthiomethyl, hexylthioethyl, octylthiomethyl, octylthioethyl, dodecylthiomethyl, dodecylthioethyl, hexadecylthiomethyl, and hexylthiomethyl.
- R 7 and R 8 may be the same or different, but at least one of R 7 and R 8 is a hydrocarbon group containing a thioether bond.
- examples of the acidic phosphoric acid ester include a compound represented by the general formula (IIa):
- Examples of the acidic phosphoric acid ester represented by the general formula (IIa) include: Mono- or di- (hexyl thioethyl) hydrogen phosphate, mono- or di- (octyl thioethyl) hydrate mouth gen phosphate, mono- or di- (dodecyl thioethyl) hydrogen phosphate, mono- or di- (hexadecylthio) (Ethyl) hydrogen phosphate and the like.
- the phosphite is represented by the general formula (II-b) or the general formula (IIc)
- Examples of the acidic phosphite represented by the general formula (IIb) or (IIc) include mono- or di (hexylthioethyl) hydrogen phosphite, mono- or di- (octylthioethyl) ) Hydrogen phosphite, mono- or di- (dodecylthio) (Ethyl) hydrogen phosphite, mono- or di- (hexadecylthioethyl) hydrido gen phosphite, and the like.
- the phosphate ester having a hydrocarbon group containing a thioether bond of the component (B) may be used alone or in combination of two or more.
- the component (B) improves wear resistance at the time of metal-to-metal contact and at the same time acts to increase the friction coefficient between metals.
- the amount of the component (B) in the present invention is preferably 50 to 600 ppm by mass, more preferably 100 to 400 ppm by mass, in terms of the phosphorus content, based on the composition.
- the blending amount of the component (B) is 50 to 600 ppm by mass in terms of the phosphorus content, abrasion resistance can be ensured, and there is no risk of impairing oxidation stability.
- the component (C) of the present invention is one or a mixture of two or more selected from a phosphate ester, an amine salt thereof, and an overbased calcium sulfonate.
- orthophosphoric ester in this case, orthophosphoric ester, phosphite, acidic phosphoric ester, acidic phosphite, and amine salts thereof can be used without particular limitation.
- the phosphate corresponding to the component (B) is excluded.
- examples of the orthophosphate and the phosphite include tributyl phosphate and phosphite, trihexyl phosphate and phosphite, tri-2-ethylhexyl phosphate and phosphite, tridecyl.
- C1-C30 alkyl groups such as phosphates and phosphites, trilauryl phosphates and phosphites, trimyristyl phosphates and phosphites, tripalmityl phosphates and phosphites, tristearyl phosphates and phosphites, trioleyl phosphates and phosphites Or an aryl group having 6 to 30 carbon atoms, such as a phosphoric acid ester and a phosphite having an alkyl group, trifluorophosphate and phosphite, tricresyl phosphate and phosphite. Phosphoric acid esters and phosphorous acid esters.
- acid phosphates and acid phosphites are mono- or di-butyl hydrogen phosphate and phosphite, mono- or di-pentyl hydrogen phosphate and phosphite, mono- or di-2-ethylhexylhydrogen.
- An alkyl or alkenyl group having 1 to 30 carbon atoms such as lauryl hydrogen phosphate and phosphite, mono- or distearyl hydrogen phosphate and phosphite, mono- or dioleyl hydrogen phosphate and phosphite.
- C6 to C30 aryl groups such as acidic phosphates and phosphites, mono- or diphenyl hydrogen phosphate and phosphite, mono- or dicresyl hydrogen phosphate and phosphite. And acidic phosphites.
- the amine salt of the phosphate ester of the present invention is an amine salt with the above phosphate ester, and the amines forming the amine salt include, for example, a compound represented by the general formula (III):
- R 9 represents an alkyl group or alkenyl group having 3 to 30 carbon atoms, an aryl group or aralkyl group having 6 to 30 carbon atoms, or a hydroxyalkyl group having 2 to 30 carbon atoms; Represents 1, 2 or 3.
- R 9 represents an alkyl group or alkenyl group having 3 to 30 carbon atoms, an aryl group or aralkyl group having 6 to 30 carbon atoms, or a hydroxyalkyl group having 2 to 30 carbon atoms; Represents 1, 2 or 3.
- a plurality of Rs may be the same or different.
- the alkyl group or alkyl group having 3 to 30 carbon atoms in R in the general formula (III) may be linear, branched, or cyclic.
- examples of the monosubstituted amine include butylamine, pentylamine, hexylamine, cyclohexylamine, octylamine, laurylamine, stearylamine, oleylamine, benzylamine, and the like.
- disubstituted amine examples include: Dibutylamine, dipentylamine, dihexylamine, dicyclohexylamine, dioctylamine, dilaurylamine, distearylamine, dioleylamine, dibenzylamine, stearyl 'monoethanolamine, decyl' monoethanolamine, hexyl'monopropanolamine, benzyl “Monoethanolamine, Albert” Monoethanolamine, Tolyl Monopropanolamine.
- trisubstituted amines examples include tributylamine, tripentylamine, trihexylamine, tricyclohexylamine, trioctylamine, and trioctylamine.
- the number of carbon atoms of 3 is high in that the object of the present invention is to improve the abrasion resistance at the time of metal-to-metal contact and at the same time to have a high effect of increasing the friction coefficient between metals.
- Phosphates having an alkyl group of 12 to 12 carbon atoms or aryl groups of 6 to 12 carbon atoms and amine salts thereof are preferable, and among them, tricresyl phosphate, mono- or di-ethyl hexyl hydrogen phosphate is preferable.
- Preferred are mono- or di-2-ethylhexylhydrido gen phosphite, dimethyl acid phosphate laurylamine, and the like.
- phosphate esters and their amine salts may be used alone or in combination of two or more.
- the compounding amount is usually from 50 to 1500 mass ppm in terms of phosphorus content based on the composition, and preferably from 80 to: LOOO mass ppm. If the phosphoric acid ester and their amine salts are 50 to 1500 ppm by mass in terms of phosphorus content, good abrasion resistance and the like can be maintained.
- the overbased calcium sulfonate which is one of the components (C) in the present invention those having a base number in the range of 50 to 700 mg KOHZg are preferred, and particularly those having a base number of 200 to 600 mg KOHZg. Things are preferred,.
- An overbased calcium sulfonate having a base number of 50 to 700 mg KOHZg sufficiently exerts the effect of improving abrasion resistance during metal-to-metal contact.
- the amount of the above-mentioned overbased calcium sulfonate is preferably 100 to 2000 mass ppm in terms of calcium content based on the usual composition, and more preferably 200 to 1500 mass ppm. Is more preferable.
- the compounding amount of the perbasic calcium sulfonate as the component (C) is from 100 to 2,000 ppm by mass in terms of the calcium content, the abrasion resistance during metal-to-metal contact is exhibited well.
- an antiwear agent which is the component (D)
- an antiwear agent which is the component (D)
- the durability of the lubricating oil composition for CVT is further improved.
- antiwear agents include sulphide oils and fats, which are sulphides of animal and vegetable oils and synthetic oils, sulphide olefins, polysulphides, sulphide mineral oils, thiophosphoric acids, thiocarbamic acids, thioterpenes, dialkyl thiodiprosides. Pionates and the like can be mentioned.
- sulphide fats and oils include sulfurized lard, sulphide rapeseed oil, sulphide castor oil, sulphide soybean oil, sulphide rice bran oil, and disulfide sulphide fatty acids such as sulphide oleic acid. And sulfuric acid esters such as methyl sulfuric acid methyl oleate.
- olefin sulfide include those obtained by reacting an olefin having 3 to 20 carbon atoms or its dimer to tetramer with a sulfurizing agent, specifically, sulfur, sulfur chloride, or another sulfur halide.
- the olefin is preferably, for example, propylene, isobutene, disobutene and the like.
- the polysulfide is represented by the general formula (IV)
- R 1Q and R 11 each represent an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, or 7 carbon atoms.
- X is a dihydrocarbyl polysulfide represented by a real number (specifically, a rational number) of 2 to 8, which may be the same or different from each other.
- R 1Q and R 11 in the general formula (IV) include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a t-butyl group.
- Preferred examples of the polysulfide include dibenzyl polysulfide, di-t-polypolysulfide, didodecyl polysulfide, and the like.
- dithiophosphoric acids include, for example, zinc dialkyldithiophosphate and molybdenum dialkyldithiophosphate
- thiocarbamic acids include, for example, zinc dialkyldithiocarnomate and molybdenum dialkyldithiocarnomate.
- Dialkylthiodiprobione such as the reaction product of phosphorus pentasulfide and pinene
- the salts include dilaurylthiodipropionate, distearylthiodipropionate, and the like.
- lard sulfide zinc dialkyldithiophosphate, dilaurylthiodipropionate and isobutene sulfide are preferred, and zinc dialkyldithiophosphate is particularly preferred.
- the sulfur-based antiwear agent may be used alone or in combination of two or more.
- the amount of the thiophosphoric acid and thiocarbamic acid is usually preferably 0.2 to 2.0% by mass, more preferably 0.5 to 1.0% by mass, based on the composition.
- the sulfur content is preferably 100 to 5000 ppm by mass, more preferably 400 to 3000 ppm by mass, based on the composition.
- the CVT of the present invention is achieved by mixing the above component (B) and / or component (C) with the base oil as the component (A).
- a more preferred embodiment is a composition containing both the component (B) and the component (C).
- the friction coefficient appearing on the power transmission surface of the CVT can be expressed by the following equation (2).
- the total friction coefficient includes the intermetallic friction coefficient and the EHL.
- the size of the oil film traction coefficient t has an effect.
- the inventors have found that by using a base oil having a high cohesive energy density (CED), the traction coefficient is high, and the friction coefficient between metals contained in the following components (B);
- CED cohesive energy density
- component (A) which is a base oil with a high traction coefficient
- component (A) which is a base oil with a high traction coefficient
- (B) has the following friction coefficient between metals.
- the following components with enhanced wear resistance suppress wear of the power transmission surface and maintain the initial surface shape, such as surface roughness, so that the friction coefficient between metals and traction The coefficient and other factors do not change, and as a result, the decrease in the total friction coefficient is suppressed. From these facts, it is presumed that the power transmission capacity can be increased and the force can be prevented from decreasing.
- additives can be further blended within a range not contrary to the object of the present invention.
- additives include detergents and dispersants such as succinimides and boron succinimides, antioxidants such as phenols and amines, and corrosion inhibitors such as benzotriazoles and thiazoles.
- the amounts of these additives may be appropriately selected according to the purpose, but usually, the additives are blended so that the total of these additives is 20% by mass or less based on the composition.
- Example 1 Using the base oils and additives shown in Table 2, as shown in Table 3, the lubricating oil composition for CVT of the present invention (Example 1) and the lubricating oil composition for CVT for comparison (Comparative Examples 1-3) was prepared, and the total friction coefficient was measured by the method of Experiment I, and the traction coefficient was measured by the method of Experiment III. Table 3 shows the measurement results.
- the lubricating oil composition for CVT of the present invention (Examples 2 to 4) and the lubricating oil composition for CVT for comparison (Comparative Example 4) 1313) were prepared, and the total friction coefficient, wear width, and traction coefficient were measured by the methods of Experiment I, Experiment II, and Experiment III described above. Table 4 shows the measurement results.
- the power transmission capacity of a metal belt type CVT, a chain type CVT, a traction drive type CVT, etc. is large and the durability thereof is improved. It can be used as a lubricating oil composition for general purpose CVTs.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/594,764 US20070155632A1 (en) | 2004-03-29 | 2005-03-29 | Lubricating oil composition for continuously variable transmission |
EP05721627.7A EP1736530B1 (en) | 2004-03-29 | 2005-03-29 | Lubricating oil composition for continuously variable transmission |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-097176 | 2004-03-29 | ||
JP2004097176A JP4700288B2 (ja) | 2004-03-29 | 2004-03-29 | 無段変速機用潤滑油組成物 |
Publications (1)
Publication Number | Publication Date |
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WO2005093024A1 true WO2005093024A1 (ja) | 2005-10-06 |
Family
ID=35056180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/005886 WO2005093024A1 (ja) | 2004-03-29 | 2005-03-29 | 無段変速機用潤滑油組成物 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070155632A1 (ja) |
EP (1) | EP1736530B1 (ja) |
JP (1) | JP4700288B2 (ja) |
WO (1) | WO2005093024A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2314664A1 (en) * | 2006-04-07 | 2011-04-27 | Chevron U.S.A. Inc. | Gear lubricant with a base oil having a low traction coefficient |
WO2014156307A1 (ja) * | 2013-03-29 | 2014-10-02 | Jx日鉱日石エネルギー株式会社 | 自動変速機用潤滑油組成物 |
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DE60043448D1 (de) * | 2000-12-28 | 2010-01-14 | Doornes Transmissie Bv | Metallisches Druckband und Ölspezifikation |
JP5374026B2 (ja) | 2007-03-14 | 2013-12-25 | 出光興産株式会社 | 無段変速機用潤滑油組成物 |
EP2145941A4 (en) * | 2007-04-26 | 2011-07-13 | Idemitsu Kosan Co | LUBRICANT COMPOSITION |
JP5225696B2 (ja) * | 2008-01-18 | 2013-07-03 | 出光興産株式会社 | 潤滑油組成物および無段変速機 |
JP5395453B2 (ja) * | 2009-02-16 | 2014-01-22 | Jx日鉱日石エネルギー株式会社 | 無段変速機油組成物 |
JP6035175B2 (ja) * | 2013-03-15 | 2016-11-30 | 出光興産株式会社 | 潤滑油組成物 |
US20160122678A1 (en) * | 2013-05-30 | 2016-05-05 | The Lubrizol Corporation | Vibration resistant industrial gear oils |
CN106661493B (zh) | 2015-02-09 | 2020-11-13 | 株式会社Moresco | 润滑剂组合物及其利用、以及脂肪族醚化合物 |
CA3083952C (en) | 2017-12-11 | 2022-10-04 | Valvoline Licensing And Intellectual Property Llc | Scalable synthesis of hydrogenated alpha styrene dimer |
JP7242186B2 (ja) * | 2018-01-29 | 2023-03-20 | 出光興産株式会社 | 潤滑油組成物、潤滑油組成物の製造方法及び無段変速機 |
JP2020066682A (ja) * | 2018-10-25 | 2020-04-30 | 出光興産株式会社 | 潤滑油基油、潤滑油組成物、及び潤滑油組成物の使用方法 |
US10894930B2 (en) | 2019-03-13 | 2021-01-19 | Valvoline Licensing And Intellectual Property Llc | Traction fluid with improved low temperature properties |
JP7159097B2 (ja) * | 2019-03-28 | 2022-10-24 | Eneos株式会社 | 潤滑油組成物 |
WO2020203525A1 (ja) * | 2019-03-29 | 2020-10-08 | 出光興産株式会社 | 潤滑油組成物 |
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Also Published As
Publication number | Publication date |
---|---|
JP2005281474A (ja) | 2005-10-13 |
EP1736530A4 (en) | 2009-07-08 |
EP1736530A1 (en) | 2006-12-27 |
JP4700288B2 (ja) | 2011-06-15 |
US20070155632A1 (en) | 2007-07-05 |
EP1736530B1 (en) | 2016-02-03 |
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