[go: up one dir, main page]

WO2016152229A1 - Composition d'huile lubrifiante pour boîte de vitesses - Google Patents

Composition d'huile lubrifiante pour boîte de vitesses Download PDF

Info

Publication number
WO2016152229A1
WO2016152229A1 PCT/JP2016/051858 JP2016051858W WO2016152229A1 WO 2016152229 A1 WO2016152229 A1 WO 2016152229A1 JP 2016051858 W JP2016051858 W JP 2016051858W WO 2016152229 A1 WO2016152229 A1 WO 2016152229A1
Authority
WO
WIPO (PCT)
Prior art keywords
linear
branched
oil
viscosity
base oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/051858
Other languages
English (en)
Japanese (ja)
Inventor
中村　俊貴
剛 辰巳
洋平 薄田
耕平 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
JX Nippon Oil and Energy Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JX Nippon Oil and Energy Corp filed Critical JX Nippon Oil and Energy Corp
Priority to JP2017507543A priority Critical patent/JPWO2016152229A1/ja
Publication of WO2016152229A1 publication Critical patent/WO2016152229A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/02—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a non-macromolecular organic compound
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • 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
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/36—Esters of polycarboxylic acids
    • 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
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound

Definitions

  • the present invention relates to a lubricating oil composition for a transmission that is excellent in load resistance and metal fatigue resistance despite low viscosity.
  • lubricating oils used in automatic transmissions, manual transmissions, internal combustion engines, etc. have a viscosity temperature to improve various durability such as thermal oxidation stability, wear resistance and fatigue resistance, and to improve fuel economy. Improvements in low-temperature viscosity properties such as improved properties, reduced low-temperature viscosity, improved low-temperature fluidity are required, and in order to improve such performance, antioxidants, detergent dispersants, and abrasion are appropriately applied to base oils.
  • Lubricating oils containing various additives such as an inhibitor, a friction modifier, a seal swelling agent, a viscosity index improver, an antifoaming agent and a colorant are used.
  • Recent transmissions and engines are required to be fuel efficient, lighter, smaller, and have higher output. Furthermore, with transmissions that are combined with higher output, improvements in power transmission capability are being pursued. . For this reason, the lubricant used in these products has a reduced product viscosity and base oil viscosity, maintains high lubrication performance, and prevents wear and fatigue on the surface of bearings, gears, etc., and seizure resistance. Is required.
  • a technique for improving viscosity temperature characteristics by reducing the base oil viscosity and increasing the viscosity index improver is adopted. Since fatigue resistance deteriorates, development of a lubricating oil that can achieve both fuel saving, wear prevention, seizure resistance, and fatigue prevention at a higher level is eagerly desired.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a lubricating oil composition for a transmission that is excellent in load resistance and metal fatigue resistance while reducing viscosity.
  • the present inventors have improved the oxidation stability and copper elution property by using an ester oil having a specific structure as a base oil component, and in addition, further improved metal fatigue resistance.
  • the inventors have found that it can be improved, and have completed the present invention.
  • the present invention relates to (A) a hydrocarbon base oil having a kinematic viscosity at 40 ° C. of 5 to 20 mm 2 / s and (B) a polybasic acid having two or more ester bonds and having no unsaturated carbon bond. 1 type or 2 or more types of ester oil of ester or polyol ester is contained, dynamic viscosity in 40 degreeC is 18 mm ⁇ 2 > / s or less, and the content rate of (B) component is 0.5 on the basis of base oil whole quantity.
  • ⁇ mixed oil is 50% by mass of a lubricating oil composition as a base oil, kinematic viscosity 4 ⁇ 25 mm at 40 °C 2 / s, 100 kinematic viscosity at ° C. is 2.0 ⁇ 5.4 mm 2 / s It is the lubricating oil composition for transmissions characterized by these.
  • the present invention provides an ester oil in which the component (B) is a dibasic acid diester represented by the following formula (1) or a polyol ester represented by the following formulas (2) to (4).
  • the above-mentioned lubricating oil composition for transmissions. (R 1 to R 6 are each independently a saturated hydrocarbon group having 3 to 36 carbon atoms, R 7 and R 8 are each independently an alkyl group having 1 to 3 carbon atoms, and n is an integer of 4 to 8)
  • the present invention is the above-described lubricating oil composition for a transmission, wherein the content of the polymethacrylate viscosity index improver in the composition is 9% by mass or less based on the total amount of the composition.
  • a lubricating oil composition for a transmission which is excellent in load resistance and metal fatigue resistance while improving fuel economy by reducing viscosity.
  • the lubricating base oil according to the present invention comprises (A) a hydrocarbon base oil having a kinematic viscosity at 40 ° C. of 5 to 20 mm 2 / s and (B) a mixed base oil containing a specific ester oil.
  • the kinematic viscosity at 40 ° C. of the hydrocarbon base oil of component (A) is required to be 5 mm 2 / s or more, preferably 7.5 mm 2 / s or more, and more preferably 10 mm 2 / s or more.
  • the kinematic viscosity at 40 ° C. is required to be less 20 mm 2 / s, preferably not more than 17.5 mm 2 / s, more preferably at most 15 mm 2 / s.
  • the kinematic viscosity at 100 ° C. of the hydrocarbon base oil of component (A) is preferably 1.5 mm 2 / s or more, more preferably 1.7 mm 2 / s or more, and further preferably 2.0 mm 2 / s. That's it. Moreover, Preferably it is 4.4 mm ⁇ 2 > / s or less, More preferably, it is 4.2 mm ⁇ 2 > / s or less. If the kinematic viscosity at 100 ° C.
  • Component (A) is more than 4.4 mm 2 / s, worse viscosity temperature characteristics and low temperature viscosity characteristics, in the case of less than 1.5 mm 2 / s, oil film formation at lubricating sites Is insufficient because the metal fatigue resistance and heat resistance are inferior, and the evaporation loss of the lubricating base oil increases.
  • mineral oil base oil and / or hydrocarbon synthetic base oil can be used as the hydrocarbon base oil of component (A).
  • Mineral oil-based base oils and hydrocarbon-based synthetic base oils may be used alone or in combination of two or more.
  • each base oil does not necessarily need to satisfy
  • mineral base oil there are no particular restrictions on the production method of the mineral base oil, and solvent removal, solvent extraction, hydrocracking, solvent removal can be performed on the lubricating oil fraction obtained by atmospheric distillation and vacuum distillation of crude oil. Mention may be made of paraffinic or naphthenic mineral oils obtained by appropriately combining one or more purification means such as wax, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment.
  • the following base oils (1) to (8) are used as raw materials, and the raw oil and / or the lubricating oil fraction recovered from the raw oils are refined by a predetermined refining method and lubricated.
  • recovering an oil fraction can be mentioned.
  • the above-mentioned predetermined purification methods include hydrorefining such as hydrocracking and hydrofinishing; solvent refining such as furfural solvent extraction; dewaxing such as solvent dewaxing and catalytic dewaxing; acid clay and activated clay White clay purification; chemical (acid or alkali) cleaning such as sulfuric acid cleaning and caustic soda cleaning is preferable.
  • hydrorefining such as hydrocracking and hydrofinishing
  • solvent refining such as furfural solvent extraction
  • dewaxing such as solvent dewaxing and catalytic dewaxing
  • chemical (acid or alkali) cleaning such as sulfuric acid cleaning and caustic soda cleaning is preferable.
  • one of these purification methods may be performed alone, or two or more may be combined.
  • the order in particular is not restrict
  • the mineral base oil according to the present invention is obtained by subjecting a base oil selected from the above base oils (1) to (8) or a lubricating oil fraction recovered from the base oil to a predetermined treatment.
  • a base oil selected from the above base oils (1) to (8) or a lubricating oil fraction recovered from the base oil to a predetermined treatment.
  • the following base oil (9) or (10) is particularly preferred.
  • the thermal / oxidative stability and low temperature viscosity characteristics can be further enhanced, and the fatigue prevention performance of the lubricating oil composition is further enhanced. It is particularly preferable to include a contact dewaxing step.
  • a solvent refining treatment and / or a hydrofinishing treatment step may be further provided as necessary.
  • catalytic dewaxing the hydrocracking / isomerization product oil is reacted with hydrogen in the presence of an appropriate dewaxing catalyst under conditions effective to lower the pour point.
  • catalytic dewaxing some of the high-boiling substances in the cracking / isomerization product are converted to low-boiling substances, the low-boiling substances are separated from the heavier base oil fraction, and the base oil fraction is fractionated. Two or more kinds of lubricating base oils are obtained.
  • the low-boiling substances can be separated before obtaining the target lubricating base oil or during fractional distillation.
  • a wax isomerized base oil obtained by isomerizing a wax such as petroleum-based or Fischer-Tropsch synthetic oil can be preferably used.
  • the viscosity index of the mineral base oil is preferably 90 or more, more preferably 100 or more, still more preferably 120 or more, and most preferably 125 or more. Further, it is preferably 160 or less, more preferably 150 or less, further preferably 140 or less, particularly preferably 135 or less, and most preferably 130 or less. When the viscosity index is lower than 90, it is impossible to obtain a viscosity temperature characteristic capable of exhibiting fuel saving performance. On the other hand, if it exceeds 160, normal paraffin increases in the base oil, so that the viscosity at a low temperature increases rapidly and the function as a lubricating oil is lost.
  • the pour point of the mineral oil base oil is preferably ⁇ 25 ° C. or lower, more preferably ⁇ 27.5 ° C. or lower, still more preferably ⁇ 30 ° C. or lower, particularly preferably ⁇ 35 ° C. or lower, most preferably Preferably, it is ⁇ 40 ° C. or lower.
  • the lower limit is not particularly limited, but it is preferably ⁇ 50 ° C. or higher from the viewpoint of lowering the viscosity index and economical efficiency in the dewaxing process if it is too low.
  • any of solvent dewaxing and contact dewaxing steps may be applied.
  • the contact dewaxing step is particularly preferable because the low temperature viscosity characteristics can be further improved.
  • the% C P of the mineral base oil is 85 or more, in that it is possible to further improve the heat and oxidation stability and viscosity temperature characteristics is preferably 90 or more.
  • % C A is preferably 3 or less, more preferably 2 or less, and more preferably 1 or less.
  • % CN is 20 or less, More preferably, it is 15 or less, More preferably, it is 10 or less. Further, it is preferably 2 or more, more preferably 3 or more, further preferably 5 or more, and particularly preferably 7 or more in that the metal fatigue life can be further increased.
  • the flash point of the mineral base oil is preferably 150 ° C. or higher, more preferably 160 ° C. or higher, still more preferably 175 ° C. or higher, and particularly preferably 190 ° C. or higher.
  • the flash point as used in the field of this invention means the flash point measured based on JISK2265 (open type flash point).
  • the aniline point of the mineral oil base oil is not particularly limited, but it is preferably 90 ° C or higher, more preferably 95 ° C or higher in that a lubricating oil composition having excellent low temperature viscosity characteristics and fatigue life can be obtained. More preferably, it is 100 ° C. or higher. Further, the upper limit is not particularly limited, and may exceed 130 ° C. as one aspect of the present invention, but is preferably 130 because it is more excellent in solubility of additives and sludge and more excellent in compatibility with a sealing material. ° C or lower, more preferably 120 ° C or lower.
  • the sulfur content of the mineral oil base oil is not particularly limited, but is preferably 0.1% by mass or less, more preferably 0.05% by mass or less, still more preferably 0.01% by mass or less, and most preferably It is desirable that it is not substantially contained.
  • the nitrogen content of the component (A) is not particularly limited, but is preferably 5 ppm by mass or less, more preferably 3 ppm by mass or less, in that a composition excellent in thermal and oxidation stability can be obtained. Most preferably, it should be substantially free.
  • content of sulfur content and nitrogen content as used in the field of this invention means the value measured based on ASTM D4951.
  • hydrocarbon-based synthetic base oils include polybutene or hydrides thereof; poly- ⁇ -olefins such as 1-octene oligomers, 1-decene oligomers and 1-dodecene oligomers or hydrides thereof; alkylnaphthalenes And an aromatic synthetic oil of alkylbenzene or a mixture thereof.
  • poly- ⁇ -olefins such as 1-octene oligomers, 1-decene oligomers and 1-dodecene oligomers, or hydrides thereof are preferred.
  • the component (B) according to the present invention is a polybasic acid ester or a polyol ester or a mixture thereof, and the polybasic acid ester and the polyol ester contain two or more ester bonds and have an unsaturated carbon bond. There is no ester oil.
  • Polybasic acid ester is an ester of polybasic acid and monohydric alcohol or polyhydric alcohol
  • polyol ester is an ester of polyhydric alcohol and monobasic acid or polybasic acid
  • a saturated alcohol having usually 1 to 36 carbon atoms, preferably 1 to 24, more preferably 1 to 12, and further preferably 1 to 8 carbon atoms is used.
  • Such alcohols may be linear or branched, and specifically include, for example, methanol, ethanol, linear or branched propanol, linear or branched butanol, Linear or branched pentanol, linear or branched hexanol, linear or branched heptanol, linear or branched octanol, linear or branched nonanol , Linear or branched decanol, linear or branched undecanol, linear or branched dodecanol, linear or branched tridecanol, linear or branched tetra Decanol, linear or branched pentadecanol, linear or branched hexadecanol, linear or branched heptadecanol, linear or branched
  • the polyhydric alcohol usually a saturated alcohol having 2 to 10 valences, preferably 2 to 6 valences, is used.
  • the divalent to 10-valent polyhydric alcohol include, for example, ethylene glycol, diethylene glycol, polyethylene glycol (ethylene glycol tri- to 15-mer), propylene glycol, dipropylene glycol, polypropylene glycol (propylene glycol 3- 15-mer), 1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1, Dihydric alcohols such as 3-propanediol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol, neopentylglycol; glycerin, polyglycerin (glycerin (
  • Polyhydric alcohols such as xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, and mixtures thereof And the like.
  • ethylene glycol, propylene glycol, neopentyl glycol, glycerin, trimethylol ethane, trimethylol propane, pentaerythritol, sorbitan, and a mixture thereof are more preferable.
  • neopentyl glycol, trimethylol ethane, trimethylol propane, pentaerythritol, and a mixture thereof are most preferable because higher thermal / oxidative stability can be obtained.
  • a saturated fatty acid having 2 to 24 carbon atoms is usually used, and the fatty acid may be linear or branched.
  • acetic acid, propionic acid linear Linear or branched butanoic acid, linear or branched pentanoic acid, linear or branched hexanoic acid, linear or branched heptanoic acid, linear or branched Octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear Or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecane Acid, linear or branched octadecanoic acid, linear or branched Nonadecan
  • polybasic acids examples include dibasic acids having 2 to 36 carbon atoms and trimellitic acid.
  • the dibasic acid having 2 to 36 carbon atoms may be linear or branched, and specific examples thereof include ethanedioic acid, propanedioic acid, linear or branched butane diacid.
  • the polybasic acid ester of the component (B) may be a complete ester in which all carboxyl groups in the polybasic acid are esterified, or a partial ester in which a part of the carboxyl group is not esterified and remains as a carboxyl group. However, it is preferably a complete ester.
  • the polyol ester may be a complete ester in which all the hydroxyl groups in the polyhydric alcohol are esterified, or a partial ester in which a part of the hydroxyl groups are not esterified and remain as hydroxyl groups, but is preferably a complete ester.
  • the ester oil which is the component (B) used in the present invention may be composed of only one kind of the above-described ester compound, or may be composed of a mixture of two or more kinds.
  • the ester oil according to the present invention is any one selected from the group consisting of a dibasic acid diester represented by the following formula (1) and a polyol ester represented by any of the following formulas (2) to (4): Or it is preferable that it is ester oil which consists of 2 or more types of mixtures.
  • R 1 to R 6 are each independently a saturated hydrocarbon group having 3 to 36 carbon atoms
  • R 7 and R 8 are each independently an alkyl group having 1 to 3 carbon atoms
  • n is An integer of 4 to 8 is shown.
  • Examples of the saturated hydrocarbon group having 3 to 36 carbon atoms include an alkyl group having 3 to 36 carbon atoms, a cycloalkyl group, and an alkylcycloalkyl group.
  • the alkyl group may be linear or branched.
  • Specific examples of the alkyl group having 3 to 36 carbon atoms include n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, linear or branched pentyl group.
  • the dibasic acid diester represented by the general formula (1) and the polyol ester represented by the general formulas (2) to (4) may be used alone or in combination of two or more. When two or more are combined, a mixture of dibasic acid diesters represented by general formula (1) may be used, or a mixture of general formula (1) and polyol esters represented by general formulas (2) to (4) may be used. . Similarly, it may be a mixture of polyol esters represented by general formulas (2) to (4), or a mixture of all of general formulas (1) to (4).
  • the content of the ester oil of the component (B) in the mixed base oil according to the present invention is at least 0.5% by mass, preferably 1% by mass or more, more preferably 2% by mass or more, based on the total amount of the base oil composition. More preferably, it is 3% by mass or more, and particularly preferably 5% by mass or more.
  • the upper limit is 50% by mass or less, preferably 40% by mass or less, more preferably 30% by mass or less, further preferably 25% by mass or less, and particularly preferably 20% by mass or less, based on the total amount of the base oil composition. 10 mass% or less is the most preferable. If the content of ester oil is too large, the oxidation stability of the composition tends to deteriorate, such being undesirable. The fatigue life is significantly improved by setting the content of the component (B) ester oil in the above range.
  • the viscosity index of the mixed base oil according to the present invention is not particularly limited, but is preferably 110 or more, and more preferably 120 or more. By setting the viscosity index to 110 or more, it is possible to obtain a composition exhibiting favorable viscosity characteristics from a low temperature to a high temperature.
  • the upper limit is not particularly limited, but is usually 200 or less, and preferably 160 or less. If the viscosity index is too high, the viscosity at low temperatures tends to increase, which is not preferable.
  • Kinematic viscosity at 40 ° C. in the mixed base oil of the invention must be less than or equal 18 mm 2 / s, preferably not more than 16 mm 2 / s, more preferably at most 14 mm 2 / s. By making it 18 mm 2 / s or less, the minimum fuel efficiency can be secured.
  • the lower limit of the kinematic viscosity at 40 ° C. of the mixed base oil is not particularly limited, but is preferably 5.0 mm 2 / s or more, more preferably 7.5 mm 2 / s or more.
  • the mixed base oil according to the present invention may contain a mineral oil base oil and / or a synthetic base oil used for ordinary lubricating oil other than the components (A) and (B).
  • the content of the component (A) and the component (B) is preferably 50% by mass or more, more preferably 70% by mass or more, and further preferably 85% by mass or more, based on the total amount of the lubricating base oil. Yes, particularly preferably 90% by mass or more, and most preferably 95% by mass or more.
  • the transmission lubricating oil composition of the present invention (hereinafter also referred to as the lubricating oil composition of the present invention) has a polymethacrylate viscosity index improver content of 9% by mass or less based on the total amount of the composition. Is preferably 6% by mass or less, more preferably 3% by mass or less, and most preferably substantially not contained. If the content of the polymethacrylate viscosity index improver exceeds 9% by mass, it is not preferable because sufficient shear stability cannot be secured.
  • the lubricating oil composition of the present invention can contain various additives as required as long as the excellent viscosity temperature characteristics and low temperature performance, fatigue resistance and seizure resistance are not impaired.
  • Such an additive is not particularly limited, and any additive conventionally used in the field of lubricating oils can be blended.
  • Specific examples of such lubricating oil additives include ashless dispersants, antioxidants, extreme pressure agents, antiwear agents, friction modifiers, corrosion inhibitors, rust inhibitors, demulsifiers, metal deactivators, Examples include antifoaming agents. These additives may be used individually by 1 type, and may be used in combination of 2 or more type.
  • a nitrogen compound having at least one alkyl group or alkenyl group having 40 to 400 carbon atoms or a derivative thereof, or a boron compound, acylating agent or sulfur compound of alkenyl succinimide is used.
  • examples include modified products.
  • antioxidants examples include ashless antioxidants such as phenols and amines, and metal antioxidants such as copper and molybdenum.
  • friction modifier examples include ashless friction modifiers such as fatty acid esters, aliphatic amines, and fatty acid amides, and metal friction modifiers such as molybdenum dithiocarbamate and molybdenum dithiophosphate.
  • corrosion inhibitor examples include benzotriazole, tolyltriazole, and imidazole compounds.
  • rust preventive examples include petroleum sulfonate, alkylbenzene sulfonate, dinonylnaphthalene sulfonate, alkenyl succinic acid ester, and polyhydric alcohol ester.
  • demulsifier examples include polyalkylene glycol nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, or polyoxyethylene alkyl naphthyl ether.
  • metal deactivator examples include imidazoline, pyrimidine derivatives, benzotriazole or derivatives thereof, 2- (alkyldithio) benzimidazole, ⁇ - (o-carboxybenzylthio) propiononitrile.
  • antifoaming agents examples include silicone oils having a kinematic viscosity at 25 ° C. of less than 0.1 to 100 mm 2 / s, alkenyl succinic acid derivatives, esters of polyhydroxy aliphatic alcohols and long chain fatty acids, methyl salicylates and o -Hydroxybenzyl alcohol and the like.
  • the content is preferably 0.001 to 20% by mass based on the total amount of the composition.
  • the kinematic viscosity at 40 ° C. of the lubricating oil composition of the present invention needs to be 4 mm 2 / s or more, preferably 7.5 mm 2 / s or more, and more preferably 10 mm 2 / s or more.
  • the kinematic viscosity at 40 ° C. is required to be less 25 mm 2 / s, preferably not more than 20mm 2 / s, 16mm 2 / s or less is more preferable.
  • the kinematic viscosity at 40 ° C. of the lubricating oil composition is required to be less 25 mm 2 / s, preferably not more than 20mm 2 / s, 16mm 2 / s or less is more preferable.
  • Kinematic viscosity at 100 ° C. of the lubricating oil composition of the present invention is required to be 2.0 mm 2 / s or more, preferably at least 2.5 mm 2 / s, more preferably not less than 3.0 mm 2 / s .
  • the kinematic viscosity at 100 ° C. is required to be less 5.4 mm 2 / s, preferably not more than 5.0 mm 2 / s, more preferably at most 4.5 mm 2 / s.
  • a lubricating oil composition having excellent low-temperature viscosity characteristics can be obtained.
  • the low-temperature viscosity characteristics are determined by measuring the Brookfield viscosity (BF viscosity) at ⁇ 40 ° C. of the lubricating oil composition according to ASTM D 2983. It means that the smaller the value of the BF viscosity, the better the low temperature fluidity.
  • the BF viscosity at ⁇ 40 ° C. of the lubricating oil composition of the present invention is preferably 23,000 mPa ⁇ s or less, more preferably 14,000 mPa ⁇ s or less, and even more preferably 10,000 mPa ⁇ s or less.
  • it is preferably 1,000 mPa ⁇ s or more, more preferably 1,500 mPa ⁇ s or more, and even more preferably 2,000 mPa ⁇ s or more. If it is less than 1,000 mPa ⁇ s, seal leakage at low temperatures increases, and there is a fear that hydraulic pressure cannot be secured.
  • Lubricating oil compositions having the compositions shown in Table 1 were prepared. The proportion (mass%) of the base oil is based on the total amount of the base oil, and the added amount (mass%) of each additive is based on the total amount of the composition. The properties of each lubricating oil composition were evaluated by the following test and listed in Table 1.
  • the lubricating stability of the lubricating oil composition of the present invention is preferably 1.5% or less, more preferably 1.2% or less, and particularly preferably 0.9%. It is as follows.
  • Base oil A-1 Mineral oil base oil (40 ° C. kinematic viscosity 7.5 mm 2 / s, 100 ° C. kinematic viscosity 2.3 mm 2 / s)
  • Base oil A-2 Mineral oil base oil (40 ° C. kinematic viscosity 19.9 mm 2 / s, 100 ° C. kinematic viscosity 4.3 mm 2 / s)
  • Base Oil A-3 mineral base oil (40 ° C.
  • Base oil A-4 poly- ⁇ -orphine oil (40 ° C. kinematic viscosity 5.0 mm 2 / s, 100 ° C. kinematic viscosity 1.7 mm 2 / s)
  • Base oil B-1 dibasic acid diester having the structure represented by the general formula (1); diester of azelaic acid and saturated alcohol having 8 carbon atoms in total, 40 ° C. kinematic viscosity 11.0 mm 2 / s, 100 °C kinematic viscosity 3.1 mm 2 / s, viscosity index 146)
  • Base oil B-2 polyol ester having a structure represented by the general formula (2); diester of neopentyl glycol and a saturated fatty acid having a total carbon number of 8 (40 ° C. kinematic viscosity 7.5 mm 2 / s, 100 ° C.
  • Base oil B-3 polyol ester having a structure represented by the general formula (3); triester of trimethylolpropane and saturated fatty acid having a total carbon number of 8 to 10 (kinematic viscosity at 40 ° C. 19.7 mm 2 / s) , 100 ° C. kinematic viscosity 4.4 mm 2 / s) (4)
  • Base oil B-4 Monoester containing an unsaturated hydrocarbon group; Monoester of oleic acid and saturated alcohol having a total carbon number of 8 (40 ° C. kinematic viscosity 8.5 mm 2 / s, 100 ° C.
  • Base oil B-5 polyol ester in which R 3 and R 4 are unsaturated hydrocarbon groups in the structure represented by the general formula (2); diester of neopentyl glycol and oleic acid (kinematic viscosity at 40 ° C. (24.2 mm 2 / s, 100 ° C. kinematic viscosity 5.9 mm 2 / s)

Landscapes

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

Abstract

L'invention concerne une composition d'huile lubrifiante comprenant à titre d'huile de base une huile mixte contenant (A) une huile de base de type hydrocarbures ayant une viscosité cinétique à 40 °C de 5 à 20 mm2/s et (B) un ou plusieurs types d'huiles esters constituées soit d'un ester d'acide polybasique exempt de liaison carbone insaturée, soit d'un ester de polyol contenant deux liaisons ester ou plus, ayant une viscosité cinétique à 40 °C de 18 mm2/s ou moins, et un taux de teneur en composant (B) de 0,5 à 50 % en poids en termes de quantité totale d'huile de base à titre de composition d'huile lubrifiante pour une boîte de vitesses permettant de réaliser à la fois une économie de carburant et d'offrir une durabilité de l'unité qui permet d'élever l'indice de viscosité même par ajout d'une petite quantité d'additif améliorant l'indice de viscosité, ladite composition d'huile lubrifiante pour transmission étant caractérisée par une viscosité cinétique à 40 °C de 4 à 25 mm2/s et une viscosité cinétique à 100 °C de 2,0 à 5,4 mm2/s.
PCT/JP2016/051858 2015-03-20 2016-01-22 Composition d'huile lubrifiante pour boîte de vitesses Ceased WO2016152229A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017507543A JPWO2016152229A1 (ja) 2015-03-20 2016-01-22 変速機用潤滑油組成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-057940 2015-03-20
JP2015057940 2015-03-20

Publications (1)

Publication Number Publication Date
WO2016152229A1 true WO2016152229A1 (fr) 2016-09-29

Family

ID=56978353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/051858 Ceased WO2016152229A1 (fr) 2015-03-20 2016-01-22 Composition d'huile lubrifiante pour boîte de vitesses

Country Status (2)

Country Link
JP (1) JPWO2016152229A1 (fr)
WO (1) WO2016152229A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210355404A1 (en) * 2018-10-25 2021-11-18 Idemitsu Kosan Co.,Ltd. Lubricating oil base oil, lubricating oil composition, and method for using lubricating oil composition
WO2025204999A1 (fr) * 2024-03-28 2025-10-02 出光興産株式会社 Huile de base lubrifiante

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975997A (ja) * 1982-09-20 1984-04-28 ストウフア−・ケミカル・カンパニ− トランスミツシヨン用合成潤滑剤組成物
JP2001509534A (ja) * 1997-07-07 2001-07-24 エクソンモービル・ケミカル・パテンツ・インク 改良された粘度特性を有する自動変速機液組成物
JP2004010894A (ja) * 2002-06-05 2004-01-15 Infineum Internatl Ltd エネルギー保存型動力伝達装置用流体
JP2009544767A (ja) * 2006-07-21 2009-12-17 エクソンモービル リサーチ アンド エンジニアリング カンパニー 重荷重ギヤ装置の潤滑方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975997A (ja) * 1982-09-20 1984-04-28 ストウフア−・ケミカル・カンパニ− トランスミツシヨン用合成潤滑剤組成物
JP2001509534A (ja) * 1997-07-07 2001-07-24 エクソンモービル・ケミカル・パテンツ・インク 改良された粘度特性を有する自動変速機液組成物
JP2004010894A (ja) * 2002-06-05 2004-01-15 Infineum Internatl Ltd エネルギー保存型動力伝達装置用流体
JP2009544767A (ja) * 2006-07-21 2009-12-17 エクソンモービル リサーチ アンド エンジニアリング カンパニー 重荷重ギヤ装置の潤滑方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210355404A1 (en) * 2018-10-25 2021-11-18 Idemitsu Kosan Co.,Ltd. Lubricating oil base oil, lubricating oil composition, and method for using lubricating oil composition
WO2025204999A1 (fr) * 2024-03-28 2025-10-02 出光興産株式会社 Huile de base lubrifiante

Also Published As

Publication number Publication date
JPWO2016152229A1 (ja) 2018-01-11

Similar Documents

Publication Publication Date Title
JP5288861B2 (ja) 潤滑油組成物
JP5647389B2 (ja) 自動車用変速機油組成物
JP6219799B2 (ja) ハイブリッド車又は電気自動車の減速機用潤滑油組成物
JP5988891B2 (ja) 変速機用潤滑油組成物
JP5819384B2 (ja) 自動車用変速機油組成物
JP5389048B2 (ja) 難燃性油圧作動油組成物
JP6247600B2 (ja) 変速機用潤滑油組成物
JP5184068B2 (ja) 難燃性油圧作動油組成物
JP6951272B2 (ja) 潤滑油用添加剤組成物及び潤滑油組成物
WO2020132068A1 (fr) Fluides caloporteurs à faible viscosité ayant un point d'éclair croissant et une conductivité thermique croissante
JP2018111779A (ja) 駆動伝達装置用潤滑油組成物
JP6373857B2 (ja) 潤滑油組成物
WO2016152229A1 (fr) Composition d'huile lubrifiante pour boîte de vitesses
JP6309017B2 (ja) ギヤ用潤滑油組成物
JP2010280825A (ja) 潤滑油組成物
JP7045878B2 (ja) 油圧作動油組成物
WO2024181435A1 (fr) Composition d'huile lubrifiante
JPWO2018030475A1 (ja) 潤滑油組成物

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16768132

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017507543

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16768132

Country of ref document: EP

Kind code of ref document: A1