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WO2019073294A1 - Composition d'huile lubrifiante - Google Patents

Composition d'huile lubrifiante Download PDF

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Publication number
WO2019073294A1
WO2019073294A1 PCT/IB2018/001149 IB2018001149W WO2019073294A1 WO 2019073294 A1 WO2019073294 A1 WO 2019073294A1 IB 2018001149 W IB2018001149 W IB 2018001149W WO 2019073294 A1 WO2019073294 A1 WO 2019073294A1
Authority
WO
WIPO (PCT)
Prior art keywords
lubricating oil
oil composition
group
composition according
acid ester
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/IB2018/001149
Other languages
English (en)
Japanese (ja)
Inventor
後藤伶奈
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
ExxonMobil Research and Engineering Co
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
Priority to US16/754,689 priority Critical patent/US20200231894A1/en
Application filed by ExxonMobil Research and Engineering Co filed Critical ExxonMobil Research and Engineering Co
Priority to SG11202002403RA priority patent/SG11202002403RA/en
Priority to EP18814673.2A priority patent/EP3696254A1/fr
Publication of WO2019073294A1 publication Critical patent/WO2019073294A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/12—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing conjugated diene
    • 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
    • C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
    • C—CHEMISTRY; METALLURGY
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/86—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of 30 or more atoms
    • C10M129/88—Hydroxy compounds
    • C10M129/90—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/86—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of 30 or more atoms
    • C10M129/92—Carboxylic acids
    • C10M129/93—Carboxylic acids having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/86—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of 30 or more atoms
    • C10M129/95—Esters
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    • C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
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    • C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
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    • C10M141/12—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
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    • 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
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
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    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • 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
    • C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
    • 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
    • C10N2040/044—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions
    • 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, and more particularly, it is suitable for gears and transmissions for automobiles, which is excellent in metal fatigue life, wear resistance, and electrical insulation even when the viscosity is lowered. It relates to a lubricating oil composition.
  • Lubricant compositions for automobiles are required to be reduced in viscosity in order to save fuel consumption.
  • simply reducing the viscosity of conventional lubricating oil compositions causes metal fatigue and wear on gear tooth surfaces and bearings.
  • various studies have been conducted to reduce the viscosity of automobile lubricating oil compositions.
  • lowering the viscosity adversely affects the ability to form an oil film on the sliding surface and causes deterioration of metal fatigue life, wear resistance, electrical insulation, etc.
  • the lower limit of viscosity is limited in conventional lubricating oil compositions. was there.
  • JP-A 2 0 0 0 5 5 3 4 4 Patent document 1
  • the viscosity is reduced using a hydrogenated saturated polygen having a functional group added thereto
  • the lubrication is The kinematic viscosity at 100 ° C. as an oil composition is about 5 to 14 mm 2 / s. This does not meet the current fuel efficiency requirements.
  • JP-A-11-50639-1 Patent Document 2
  • JP-A-11-105697-8 Patent Document 3
  • lubricating oil compositions containing unsaturated polygens are described, the problem of solving the above problems associated with fuel saving is not mentioned.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2 0 1 0 0 5 0 3 7 4
  • Patent Document 2 Japanese Patent Application Publication No. H11-118.
  • Patent Document 3 Japanese Patent Application Publication No. H11-118.
  • the present invention is a lubricating oil composition having a viscosity lower than that of conventional lubricating oil compositions and to provide a lubricating oil composition excellent in metal fatigue life, wear resistance, and electrical insulation. With the goal.
  • the present inventors have formulated a lubricating oil composition with a specific polygen and a composition that does not contain a viscosity index improver, so that the kinematic viscosity at 100 ° C. is less than 1 to 5 mm 2 Zs. It has been found that it is possible to provide a composition having the following properties and maintain excellent metal fatigue life, wear resistance, and electrical insulation.
  • the present invention provides (A) a lubricating oil base oil, and (B) a polydiene having a number average molecular weight of 500 to 3000 and having a functional group at at least one end as a whole lubricating oil composition. It is characterized in that it is contained in an amount of 0.6 to 4.0% by mass with respect to the mass of the composition, contains no viscosity index improver, and has a kinematic viscosity at 100 ° C. of less than 1 to 5 mm 2 / s. It relates to a lubricating oil composition.
  • a lubricating oil composition satisfying at least one of the following (1) to (11) is provided.
  • the functional group in the component (B) is selected from a carboxyl group, an ester group, an anhydrous carboxyl group, a hydroxyl group, a glycidyl group, and an amino group.
  • the functional group is a hydroxyl group.
  • the (C) phosphorus-based antiwear agent is zinc dialkyl dithiophosphate.
  • the above-mentioned (C) phosphorus-based extreme pressure agent is a phosphoric acid ester, a phosphorous acid ester, a thiophosphoric acid ester, a titanium acid phosphoric acid ester, an acidic phosphoric acid ester, an acidic phosphoric acid ester, a acidic phosphoric acid ester It is at least one selected from the group consisting of an ester, an acid phosphite and an amine salt thereof.
  • the lubricant base oil has a kinematic viscosity at 100 ° C. to 4 mm 2 Zs.
  • the present invention can provide a lubricating oil composition which has a lower viscosity than before and which has excellent metal fatigue life, wear resistance, and electrical insulation.
  • the lubricating oil composition of the present invention is suitable as an automotive gear oil, an automotive transmission oil, and a hybrid-automotive transmission oil.
  • the lubricating oil composition of the present invention is characterized by containing no viscosity index improver.
  • lubricating oil compositions generally contain a viscosity index improver to improve viscosity characteristics.
  • a viscosity index improver to improve viscosity characteristics.
  • polymethacrylates, polyisoptylenes and hydrogenated products thereof, styrene-hydrogen-hydrogenated copolymers, styrene-anhydride-maleic acid ester copolymers, polyalkylstyrenes and the like are used.
  • the inclusion of these viscosity index improvers increases the kinematic viscosity of the lubricating oil composition and limits the reduction of viscosity.
  • the present invention provides a lubricating oil composition having a kinematic viscosity at 100 ° C. of less than 1 to 5 mm 2 / s, aiming to further reduce the viscosity of the lubricating oil composition by not containing the viscosity index improver. Made it possible to
  • the lubricating oil composition of the present invention has a kinematic viscosity at 100 ° C. of 1 mm 2 / s or more and 5 mm 2 or less. More preferably, it is 1.5 mm 2 Zs or more and 4.5 mm 2 / s or less, and most preferably 1.5 mm 2 / s or more and 4.0 mm 2 / s or less.
  • the lubricant base oil in the present invention may be a conventionally known lubricant base oil, and there are mineral oil, synthetic oil, or a mixture of these oils.
  • the kinematic viscosity of the lubricating base oil is not limited, but preferably has a kinematic viscosity at 100 ° C. to 4 mm 2 / s.
  • a mineral oil base oil lubricating oil distillate obtained by atmospheric distillation and vacuum distillation of crude oil The components are refined by appropriately combining solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, hydrorefining, sulfuric acid washing, refining treatment such as white soil treatment, etc., paraffinic, naphthenic, etc.
  • examples thereof include lubricating base oils, and lubricating base oils obtained by isomerizing and dewaxing waxes obtained by solvent dewaxing.
  • the dynamic viscosity of the mineral base oil is not particularly limited, but in order to obtain a lubricating oil composition having a low viscosity, it is preferably 1 to 4 mm 2 Z s.
  • Examples of synthetic base oils include: poly ⁇ - ⁇ -refin, ⁇ - ⁇ -refin copolymer, iso-paraffin, alkylbenzene, alkyl naphthalene, monoester, diester, polyol ester, polyoxyalkylene glycol, dialkydiphenol Ru-Tel, Poly-Her-Tel and GTL base oils can be used.
  • the kinematic viscosity of the synthetic base oil is not particularly limited, but in order to obtain a lubricating oil composition having a low viscosity, the kinematic viscosity at 100 ° C. is 1 to 4 mms. preferable.
  • the lubricant base oil may be used alone or in combination of two or more. When two or more are used, use of two or more mineral base oils, use of two or more synthetic base oils, and use of one or more mineral base oils and one or more synthetic base oils is possible.
  • the whole of the lubricating base oil has a kinematic viscosity at 100 ° C of 1 to 4 mm 2 Zs, preferably 1.5 to 5 It is preferred to have 3.5 mm 2 / s, in particular 2 to 3 m 2 / s.
  • the component (B) is one in which at least one end of the molecular chain of polygen is modified by introduction of a functional group (hereinafter sometimes referred to as terminal modified polygen).
  • the polygen is obtained by (co) polymerizing monomer gen, and the saturated polygen is obtained by hydrogenating the carbon-carbon double bond of the polygen obtained as described above. It is a hydride.
  • the lubricating oil composition of the present invention is characterized by containing the terminally modified polygen.
  • the terminal modified polygen may be a terminal modified unsaturated polygen or a terminal modified saturated polygen. It may be. From the viewpoint of solubility in lubricating oil base oils, it is preferable to use terminally modified saturated polygons.
  • the polygen having a functional group is adsorbed on the sliding surface to partially increase the viscosity of the composition to increase the oil film thickness of the lubricating oil composition.
  • the number average molecular weight of the terminal denatured saturated polygen is 500 to 300. More preferably, it is 600-250, and most preferably 800-200. If the number average molecular weight is less than the above lower limit, there is a problem that the metal fatigue resistance is deteriorated, and if the number average molecular weight exceeds the above upper limit, the thickening effect becomes large and the fuel economy is impaired. Yes, not preferable.
  • the number average molecular weight is the value of polystyrene as a standard substance by gel permeation chromatography (GPC).
  • Examples of the monomer include hydrocarbons having at least two unsaturated bonds of 4 to 0 carbon atoms.
  • hydrocarbons having at least two unsaturated bonds of 4 to 0 carbon atoms.
  • preferred monomer is a conjugated gene, and more preferred are 1,3-butadiene and isoprene.
  • the structure of a polygen obtained by polymerizing such a monomer may be, for example, in the case of polyvinyl butadiene, one obtained by 1, 2-addition or one obtained by 1, 4 addition. . Also, both may be mixed.
  • the saturated polydiene in the present invention may be a copolymer of a monomer and another monomer in addition to the above monomer.
  • Such monomer and co-weight for example, vinyl aromatic hydrocarbon is preferable, and styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, divinylbenzene, t-butylstyrene and the like can be mentioned.
  • the component (B) is one in which at least one end of the molecular chain of polygen is modified by the introduction of a functional group. It may be one in which a functional group is introduced only at one end of the polygen molecular chain or one in which a functional group is introduced at both ends of the polygen molecular chain. Furthermore, when the polygen molecular chain has a branch, a functional group may be introduced at the branched end. From the viewpoint of extending the metal fatigue life and promoting the maintenance action, it is preferable that functional groups be introduced at least at both ends.
  • the functional group in the present invention includes a functional group containing at least one type of hetero atom selected from the group consisting of oxygen, iodine, nitrogen and phosphorus.
  • a functional group containing at least one type of hetero atom selected from the group consisting of oxygen, iodine, nitrogen and phosphorus As preferable functional groups, there can be mentioned a carboxyl group, an ester group, an anhydrous carboxyl group, a hydroxyl group, a glycidyl group, a urethane group, an amino group and the like. Among them, from the viewpoint of improvement of metal fatigue life, particularly preferred is a carboxyl group, a hydroxyl group, a glycidyl group or an amino group, and a hydroxyl group is most preferable.
  • the number of functional groups is, on average, 1 to 10, and preferably 1.5 or more per molecule of polygen. If the number of functional groups reaches 1 on average, the ability to form an oil film can not be sufficiently exhibited, and the metal fatigue life becomes extremely short. On the other hand, if the average number exceeds 10, the problem of solubility decrease may occur.
  • a saturated polygen is a hydrogenated carbon-carbon double bond in the main chain of the polygen.
  • the degree of hydrogenation can be determined at the level of iodine or bromine number.
  • the iodine number is preferably 100 or less, or the bromine number is preferably 63 or less, and at least one of them may be added.
  • the iodine value is particularly preferably 80 or less, more preferably 20 or less. If the degree of hydrogenation is small, there is a disadvantage that the solubility in a less polar base oil is poor.
  • Hydrogenation is selective at double bonds in the polygen main chain Preferably, hydrogenation of functional groups is avoided.
  • the chemical value of fluorine and the value of bromine can be measured in accordance with ASTM D 1 5.9 and JIS K 2 0 5 respectively.
  • examples of the terminally modified saturated polygen include a compound represented by the following formula (1).
  • X is a monovalent functional group
  • ⁇ is a hydrogen atom or a monovalent functional group.
  • ⁇ is a hydrogen atom, it becomes a polygen having a functional group introduced at one end, and when ⁇ is a monovalent functional group, it becomes a polygen having a functional group introduced at both ends.
  • the monovalent functional group is as described above, and preferred examples thereof include a carboxyl group, a hydroxyl group, a carboxyl anhydride group, an ester group, an amino group, and a glycidyl group.
  • R ' is a monovalent hydrocarbon group having from 6 to 6 carbon atoms.
  • n is an integer of 0 or 1 to 100, preferably 10 to 60.
  • the above terminal modified saturated polygen can be selected and obtained from the market.
  • the blending amount of the component (B) in the lubricating oil composition of the present invention is 0.6 to 4.0% by mass, preferably 0.8 to 3.8 wt%, based on the total mass of the lubricating oil composition. %, More preferably 1.6 to 3.6% by mass. If the blending amount of the component (B) is less than the above lower limit, the effect of improving the metal fatigue life becomes insufficient. Further, even if the above upper limit is exceeded, the improvement effect of the metal fatigue life is hardly further increased, and on the contrary, the viscosity may be increased to cause adverse effects, which is not preferable.
  • C Phosphorus-based antiwear agent or phosphorus-based extreme pressure agent
  • the lubricating oil composition of the present invention preferably contains at least one selected from phosphorus-based antiwear agents and phosphorus-based extreme pressure agents (hereinafter sometimes referred to as phosphorus-based additives).
  • the amount of the component (C) is preferably such that the total content of phosphorus atoms with respect to the total mass of the lubricating oil composition is 50 to 500 mass ppm, more preferably 80 to 450 mass p
  • the amount may be pm, more preferably 100 to 400 mass ppm, and particularly preferably 120 to 400 mass ppm.
  • the phosphorus-based anti-wear agent may be any conventionally known compound known as an anti-wear agent for lubricating oil compositions, and is not particularly limited.
  • dialkyl dithi zinc phosphate Z n DTP (also referred to as ZDDP)
  • Z n DTP is represented by the following formula (2).
  • R 2 and R 3 are each independently a hydrogen atom or a monovalent hydrocarbon group having 1 to 26 carbon atoms.
  • a monovalent hydrocarbon group a primary (primary) or secondary (secondary) alkyl group having 1 to 26 carbon atoms; an alkenyl group having 2 to 26 carbon atoms; a cycloalkyl group having 6 to 26 carbon atoms; It is a hydrocarbon group containing an aryl bond, an ether bond, an alcohol group or a carboxyl group, or an alkyl group having 6 to 26 atoms, an alkylaryl group or an arylalkyl group; More preferably, R 2 and R 3 are, independently of one another, a primary or secondary alkyl group having 2 to 12 carbon atoms, a cycloalkyl group having 8 to 8 carbon atoms, or 8 to 18 carbon atoms.
  • the primary alkyl group preferably has 3 to 12 carbon atoms, and more preferably 4 to 10 carbon atoms.
  • the secondary alkyl group preferably has 3 to 12 carbon atoms, and more preferably 3 to 10 carbon atoms.
  • zinc sorbate zinc borate Z n DTC
  • One kind of dialkyl dithiocyanate zinc phosphate (Pri one Z n DTP) having a primary alkyl group and zinc dialkyl dithiophosphate (S ec-Z n DTP) having a secondary alkyl group are used alone. Or two or more of these may be used in combination.
  • the mixing ratio in the case of using in combination is not particularly limited.
  • the amount of the phosphorus based anti-wear agent should be such that the total amount of phosphorus atoms with respect to the total weight of the lubricating oil composition satisfies the above range. Just do it. Specifically, it is an amount such that the amount of phosphorus derived from the phosphorus anti-wear agent is 50 to 500 mass ppm with respect to the total mass of the lubricating oil composition, and preferably 80 to 40 mass ppm. The amount is more preferably 100 to 400 ppm by mass, particularly preferably 1 to 400 ppm by mass.
  • the metal fatigue life of the lubricating oil composition can be prevented by blending the phosphorus anti-wear agent in an amount such that the amount of phosphorus in the composition falls within the above range, and the wear resistance and electrical insulation are secured. can do.
  • the phosphorus-based extreme pressure agent may be any conventionally known compound known as an extreme pressure agent for lubricating oil compositions, and is not particularly limited.
  • phosphoric acid, phosphorous acid, phosphonic acid, phosphoric ester, phosphorous ester, thiophosphoric acid ester, phosphoric acid ester, acidic phosphoric acid ester, acidic phosphorous acid ester, phosphonic acid ester It is preferable that it is at least one selected from the group consisting of thioacid phosphate, acid acid phosphite, and amine salts thereof.
  • the phosphorus-based extreme pressure agent may have sulfur.
  • the phosphorus-sulfur based extreme pressure agent such as thiophosphoric acid ester is included in the phosphorus-based extreme pressure agent, and is not included in the sulfur-based extreme pressure agent described later.
  • the phosphorus-based extreme pressure agent does not include zinc dititanium phosphate.
  • the phosphorus-based extreme pressure agent in the present invention does not have a metal element.
  • a is 0, 1, 2 or 3.
  • R 4 independently of one another is a monovalent hydrocarbon group having 4 to 30 carbon atoms.
  • b is 0, 1 or 2;
  • R 4 independently of one another is a monovalent hydrocarbon group of 4 to 30 carbon atoms.
  • the phosphoric acid ester and the acidic phosphoric acid ester are preferably, but not limited to, phosphoric acid monoalkyl ester, phosphoric acid dialkyl ester, and phosphoric acid trialkyl ester.
  • the phosphite ester and the acid phosphite ester are preferably, but not limited to, monophosphite esters and phosphite dialkyl esters.
  • the above-mentioned phosphoric acid, phosphorous acid, phosphonic acid, phosphoric acid ester, phosphoric acid ester, phosphorous acid ester, phosphoric acid ester, acidic phosphoric acid ester or acidic phosphorous acid ester Also included are compounds in which some oxygen atoms are substituted by sulfur atoms, such as thiophosphates, thiophosphites, acidic thiophosphates, and acidic thiophosphites.
  • monoethyl citrate diacetyl phosphate, trioctyl phosphate, monooctyl phosphite, dinitro phosphite, monohydroxy dithiophosphate, dioctyl thiophosphate, Trioctyl phosphate, potassium monophosphite, dioctyl thiophosphite, monododecyl phosphate, didodecyl phosphate, tridodecyl phosphate, monododecyl phosphite, didodecyl phosphite, butyl phosphate Ester, Acidic phosphoric acid hexyl ester, Acidic phosphoric acid octyl ester, Acidic phosphoric acid dodecyl ester, Acidic phosphorous acid butyl ester, Acidic phosphorous acid hexyl ester, Acidic phosphorous acid oct
  • alkylamine salts and alkenylamine salts of those which are partial esters of the above-mentioned compounds can also be suitably used. That is, although an amine salt of an acidic phosphoric acid ester and an amine salt of an acidic phosphorous acid ester can be used, it is not limited thereto.
  • the phosphorus-based extreme pressure agent may be blended in an amount such that the total content of phosphorus atoms with respect to the total mass of the lubricating oil composition satisfies the above-mentioned range.
  • the amount of phosphorus atom derived from the phosphorus-based extreme pressure agent relative to the total mass of the lubricating oil composition is 50 to 500 mass ppm, preferably 80 to 40 mass ppm. More preferably, it is an amount to be 100 to 400 mass pm, particularly preferably, an amount to be 120 to 400 mass ppm.
  • the lubricating oil composition of the present invention may optionally further comprise a sulfur-based extreme pressure agent.
  • the sulfur-based extreme pressure agent may be any known one, but is preferably at least one selected from a sulfide compound represented by sulfurized olefin and a sulfurized ester represented by sulfurized oil and fat. Particularly preferred is sulfurized lefin.
  • the sulfur-based extreme pressure agent is represented, for example, by the following general formula (3).
  • R 5 and R 6 are each independently a monovalent substituent containing at least one element of carbon, hydrogen, oxygen, and sulfur.
  • a saturated or unsaturated hydrocarbon group having a linear or branched structure having 1 to 40 carbon atoms can be mentioned.
  • the hydrocarbon group may be aliphatic, aromatic or araliphatic and may have oxygen and / or sulfur atoms.
  • R 5 and R 6 may be combined. When there is one bond, for example, it is represented by the following general formula (4).
  • X is an integer of 1 or more, preferably
  • Sulfide orephine is obtained by sulfurizing olefins, and is generically referred to as sulfide compound including those obtained by sulfurizing hydrocarbon-based raw materials other than refined olefins.
  • sulfurized sulfins include those obtained by sulfidation of glycated levines such as polyisoptylenes and terpenes with sulfur or other sulfurizing agents.
  • Examples of sulfide compounds other than sulfided lefin include diisobutyl disulfide, dihydroxybutyl disulfide, ditert-butylpolysulfide, diisoptylpolysulfide, dihexylpolysulfide, di-tert-polysulfide and the like.
  • Sulfurized oil and fat is a reaction product of oil and fat and sulfur, and used as fat and oil is animal and vegetable fats and oils such as lard, beef tallow, soy sauce, palm oil, coconut oil, rapeseed oil, etc. It is obtained by The reaction product is not a single substance species but a mixture of various substances, and the chemical structure itself is not always clear.
  • the sulfurized ester contains sulfur and other sulfurized ester compounds obtained by the reaction of various organic acids (saturated fatty acids, unsaturated fatty acids, dicarboxylic acids, aromatic carboxylic acids, etc.) with various alcohols, in addition to the above-mentioned sulfurized fats and oils. Those obtained by sulfiding with an agent are mentioned. Like sulfurized fats and oils, the chemical structure itself is not always clear
  • the amount of the sulfur-based extreme pressure agent of the present invention is not limited, but it is preferably 0. 0 in the lubricating oil composition.
  • the content is preferably from 0 to 5% by mass, more preferably from 0.1 to 3% by mass, and still more preferably from 0, 2 to 2% by mass.
  • the lubricant composition of the present invention may further contain an ashless dispersant.
  • the ashless dispersant may be a conventionally known one and is not particularly limited. For example, a nitrogen-containing compound having at least one alkyl or alkenyl group having a linear or branched structure or having a carbon number of 40 to 400 and having at least one alkenyl group in the molecule, or a succinic acid imide and the like The modified product etc. are mentioned.
  • the ashless dispersant may be used alone or in combination of two or more. Borated ashless dispersants can also be used.
  • the borated ashless dispersant is a borated version of any ashless dispersant used in lubricating oils. The boration is generally carried out by reacting the amide compound with boric acid to neutralize part or all of the remaining amino and / or imino groups.
  • the carbon number of the above-mentioned alkyl group or alkenyl group is preferably 40 to 40, and more preferably 60 to 30.
  • the carbon number of the above-mentioned alkyl group or alkenyl group is preferably 40 to 40, and more preferably 60 to 30.
  • the solubility of the compound in a lubricant base oil tends to decrease.
  • the carbon number of the alkyl group and the alkenyl group exceeds the above upper limit value, the low temperature fluidity of the lubricating oil composition tends to be deteriorated.
  • the alkyl group and the alkenyl group may have a linear structure or a branched structure.
  • Preferred embodiments include, for example, oligomers of purified lefin such as propylene, 1-butene and isobutene, branched alkyl groups or branched alkenyl groups derived from co-oligomers of ethylene and propylene, and the like.
  • the above-mentioned succinic acid imide is a reaction product of a so-called mono-type succinic acid imid which is a reaction product of one end of a polyamine and succinic anhydride, and a so-called reaction product of both ends of a polyamine and succinic anhydride.
  • the lubricating oil composition of the present invention may contain either one or both of mono-type and bis-type.
  • the mono-type succinic acid imide compound can be represented, for example, by the following formula (5).
  • the bis type succinic acid imide compound can be represented, for example, by the following formula (6).
  • R 7 is, independently of each other, an alkyl group having 4 to 40 carbon atoms or Is an alkenyl group, m 'is an integer of -20, and is an integer of 0-20.
  • bis-type succinic acid imide compounds are preferred.
  • the succinic acid imide compound may be a combination of monotype and bistype, a combination of two or more monotypes, or a combination of two or more bistypes.
  • the modified product of succinic acid imid is, for example, one modified with succinic acid imidized with a boron compound (hereinafter sometimes referred to as borated succinic acid imid).
  • a boron compound means to borate.
  • the borated succinic acid imides may be used alone or in combination of two or more. When used together, it may be a combination of two or more of borated succinic acid imid. In addition, both monotype and bistype may be included, or monotype and soil combination or combination of bistypes may be used. Borated succinate and non-borated succinate may be used in combination.
  • JP-B 4 2 8 013 and JP-A 4 2 0 8 14 5 and JP-A 5 1 5 2 3 8 examples thereof include the methods disclosed in JP-A-1 and JP-A-51-140 08.
  • organic solvents such as alcohols, hexane and xylene, light lubricating oil base oils etc., polyamines and succinic anhydrides (derivatives), boric acid, boric acid esters, and boron compounds such as boric acid saltscan be obtained by mixing and heat treating under appropriate conditions.
  • the content of boron contained in the borated succinic acid imide obtained in this manner can be usually from 0.4 to 4% by mass.
  • a boron-modified compound of an alkenyl succinic acid imid compound (borated succinic acid imid) is preferable because it is excellent in heat resistance, antioxidative property and antiwear property.
  • the content of boron contained in the borated ashless dispersant is not particularly limited. Usually, it is from 0 to 3% by weight based on the weight of the ashless dispersant. In one aspect of the present invention, the boron content in the ashless dispersant is preferably 0.2% by mass or more, more preferably 0.4% by mass or more, and preferably 2.5% by mass. % Or less, more preferably 2.3% by mass or less, still more preferably 2.0% by mass or less Good.
  • the borated ashless dispersant is preferably a borated succinic acid, particularly borated pisuccinic acid.
  • the borated ashless dispersant has a boron-nitrogen mass ratio (BZN ratio) of 0.1 or more, preferably 0.2 or more, preferably less than 1.0, more preferably 0. Those having 8 or less are preferred.
  • the content of the ashless dispersant may be adjusted as appropriate, but it is preferably, for example, 0.01 to 20 mass% with respect to the total mass of the lubricating oil composition, and more preferably 0. It is 1 to 10% by mass. If the content of the ashless dispersant is less than the above lower limit, the sludge dispersibility may be insufficient. In addition, if the content exceeds the above upper limit value, there is a possibility that the specific rubber material is deteriorated or the low temperature fluidity is deteriorated.
  • the lubricating oil composition of the present invention is not limited as long as the effects of the present invention are not impaired.
  • viscosity index improvers for example, polymethacrylates, polyisobutylenes and hydrogenated compounds thereof, styrene monohydrogenated copolymers, styrenes
  • the other additives include metal detergents, friction modifiers, oiling agents, rust inhibitors, antioxidants, corrosion inhibitors, metal deactivators, pour point depressants, antifoaming agents, coloring agents, And package additives for automatic transmission oils. It is also possible to add various lubricating oil / N ° cage additives containing at least one of these.
  • the lubricating oil composition according to the present invention can be used as an automotive lubricating oil composition which is required to have a particularly low viscosity, and can be suitably used as an automotive gear oil and an automotive transmission oil.
  • the lubricating oil composition of the present invention can also have a good friction reduction effect. Therefore, it can be suitably used not only as automatic transmission lubricating oil, but also as transmission oil for which high friction reduction characteristics are required, such as transmission oil for hybrid vehicles having no clutch.
  • the method of using the lubricating oil composition of the present invention may be in accordance with conventionally known methods, and is optimized according to the required performance. Example
  • the base oils and additives used are as follows.
  • Zinc dialkyl dithiophosphate antioxidant, secondary alkyl, 2-ethyl
  • Porimetakurire one Bok weight average molecular weight 50, 000, Polymer one amount: 50 mass 0/0
  • a lubricating oil composition was prepared by mixing the components described above in the compositions and amounts described in Table 1.
  • the amount of phosphorus-based extreme pressure agent is the mass p p m of phosphorus relative to the total weight of the lubricating oil composition.
  • the amounts of polybutene, sulfur-based extreme pressure agent, dispersant, viscosity index improver and other additives are each in mass% relative to the total amount of the lubricating oil composition.
  • the amount of base oil is the balance with the total amount 100 of the lubricating oil composition.
  • Each lubricating oil composition was evaluated according to the following.
  • the unit test was performed using a bearing diameter of 1 2 mm, an outer diameter of 28.5 mm, and a 2 1 mm diameter, 2 mm thrust bearing, and the additional slus ⁇ load of 1 0.5 N and rotation speed of 3000 r pm
  • the oil temperature was set to 120 ° C, and the number of cycles until metal fatigue occurred was measured.
  • the lubricating oil composition of the present invention is excellent in metal fatigue and wear resistance and has good electrical insulation (volume resistivity) at a kinematic viscosity of less than 5 mm 2 Zs at 100 ° C. Can.
  • the solubility of the terminally modified polygen compound used in the lubricating base oil was also good.
  • Comparative Example 1 when the addition amount of the predetermined polygen compound is not sufficient, the metal fatigue is inferior. As shown in Comparative Example 3, use of a polygen compound which has not been subjected to terminal modification is inferior in terms of metal fatigue and wear resistance. Thus, the lubricating oil compositions of Comparative Examples 1 and 3 are poor in any of metal fatigue properties, wear resistance, and electrical insulation properties. Furthermore, the lubricating oil composition of Comparative Example 2 has a problem in solubility. Furthermore, as shown in Comparative Example 4, the lubricating oil composition containing the viscosity index improver had a kinematic viscosity at 100 ° C. of more than 5 mm 2 / s. In the case of the lubricating oil composition of Comparative Example 4, the reduction in viscosity, which is the objective of the present invention, could not be achieved, so measurement of other physical property values was not performed.
  • the lubricating oil composition of the present invention is excellent in metal fatigue properties, wear resistance and electrical insulation properties despite its low viscosity, and is particularly suitable as transmission oil and gear oil, and is particularly suitable for hybrids. It is suitable as an automotive transmission fluid.

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  • 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 ayant une viscosité inférieure à celle de l'état de la technique, et ayant d'excellentes propriétés de durée de vie du point de vue fatigue du métal, de résistance à l'abrasion et d'isolation électrique. La présente composition d'huile lubrifiante est caractérisée en ce qu'elle comprend : (A) une huile à base d'huile lubrifiante ; et (B) un polydiène ayant un poids moléculaire moyen en nombre de 500 à 3 000, et un groupe fonctionnel au niveau d'au moins une terminaison, en une quantité de 0,6 à 4,0 % en masse de la masse totale de la composition d'huile lubrifiante. La composition d'huile lubrifiante est en outre caractérisée en ce qu'elle ne comprend pas d'améliorant d'indice de viscosité, et en ce qu'elle a une viscosité cinématique inférieure à 1-5 mm2Zs à 100 °C.
PCT/IB2018/001149 2017-10-12 2018-10-12 Composition d'huile lubrifiante Ceased WO2019073294A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/754,689 US20200231894A1 (en) 2017-10-12 2017-10-12 Lubricating Oil Composition
SG11202002403RA SG11202002403RA (en) 2017-10-12 2018-10-12 Lubricating oil composition
EP18814673.2A EP3696254A1 (fr) 2017-10-12 2018-10-12 Composition d'huile lubrifiante

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017198410A JP2019073570A (ja) 2017-10-12 2017-10-12 潤滑油組成物
JP2017-198410 2017-10-12

Publications (1)

Publication Number Publication Date
WO2019073294A1 true WO2019073294A1 (fr) 2019-04-18

Family

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PCT/IB2018/001149 Ceased WO2019073294A1 (fr) 2017-10-12 2018-10-12 Composition d'huile lubrifiante

Country Status (5)

Country Link
US (1) US20200231894A1 (fr)
EP (1) EP3696254A1 (fr)
JP (1) JP2019073570A (fr)
SG (1) SG11202002403RA (fr)
WO (1) WO2019073294A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7616881B2 (ja) * 2020-12-25 2025-01-17 三和油化工業株式会社 潤滑油用添加剤及びそれを含む潤滑油組成物
JP2023008046A (ja) * 2021-07-05 2023-01-19 出光興産株式会社 潤滑油組成物

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030930A (en) * 1992-12-17 2000-02-29 Exxon Chemical Patents Inc Polymers derived from ethylene and 1-butene for use in the preparation of lubricant disperant additives
WO2008146837A1 (fr) * 2007-05-29 2008-12-04 Ntn Corporation Palier prélubrifié par lubrifiant solide en mousse et procédé de production de celui-ci
JP2010059374A (ja) * 2008-09-06 2010-03-18 Tonengeneral Sekiyu Kk 潤滑油組成物

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0631380B2 (ja) * 1985-10-03 1994-04-27 株式会社松村石油研究所 歯切切削油組成物
US7307048B2 (en) * 2001-05-28 2007-12-11 Nissan Motor Co., Ltd. Transmission oil composition for automobile
JP5988891B2 (ja) * 2013-02-19 2016-09-07 Ｊｘエネルギー株式会社 変速機用潤滑油組成物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030930A (en) * 1992-12-17 2000-02-29 Exxon Chemical Patents Inc Polymers derived from ethylene and 1-butene for use in the preparation of lubricant disperant additives
WO2008146837A1 (fr) * 2007-05-29 2008-12-04 Ntn Corporation Palier prélubrifié par lubrifiant solide en mousse et procédé de production de celui-ci
JP2010059374A (ja) * 2008-09-06 2010-03-18 Tonengeneral Sekiyu Kk 潤滑油組成物

Also Published As

Publication number Publication date
EP3696254A1 (fr) 2020-08-19
SG11202002403RA (en) 2020-04-29
JP2019073570A (ja) 2019-05-16
US20200231894A1 (en) 2020-07-23

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