WO2023189697A1 - Composition lubrifiante - Google Patents

Composition lubrifiante Download PDF

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Publication number
WO2023189697A1
WO2023189697A1 PCT/JP2023/010506 JP2023010506W WO2023189697A1 WO 2023189697 A1 WO2023189697 A1 WO 2023189697A1 JP 2023010506 W JP2023010506 W JP 2023010506W WO 2023189697 A1 WO2023189697 A1 WO 2023189697A1
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Prior art keywords
mass
group
lubricating oil
oil composition
component
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PCT/JP2023/010506
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English (en)
Japanese (ja)
Inventor
啓司 大木
潤 山下
Original Assignee
出光興産株式会社
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Publication of WO2023189697A1 publication Critical patent/WO2023189697A1/fr

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Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04Hydroxy compounds
    • C10M129/10Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/06Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/16Amides; Imides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M135/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/12Thio-acids; Thiocyanates; Derivatives thereof
    • C10M135/14Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
    • C10M135/18Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M137/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04Phosphate esters
    • C10M137/10Thio derivatives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M139/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating 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
    • C10M169/04Mixtures of base-materials and additives

Definitions

  • the present invention relates to a lubricating oil composition, an internal combustion engine filled with the lubricating oil composition, and a method of using the lubricating oil composition.
  • Patent Document 1 discloses that a 100N hydrotreated mineral oil contains a hindered amine compound, an amine antioxidant, a metal detergent, and an organic zinc dithiophosphate, and the hindered amine compound and the amine antioxidant are mixed in a predetermined ratio.
  • a lubricating oil composition for an internal combustion engine of a hybrid vehicle comprising:
  • a lubricating oil composition that has an improved effect of suppressing copper elution and can be suitably used in an internal combustion engine of a hybrid system having an internal combustion engine and an electric motor as power sources.
  • a lubricating oil composition containing a hindered amine compound and an organic zinc dithiophosphate having at least one primary alkyl group together with a base oil I found a solution.
  • the present invention discloses the following aspects.
  • An internal combustion engine installed in a hybrid system filled with the lubricating oil composition according to [1] above.
  • a method for lubricating an internal combustion engine in which the lubricating oil composition according to [1] above is applied to an internal combustion engine installed in a hybrid system.
  • the lubricating oil composition of a preferred embodiment of the present invention has an excellent effect of suppressing copper elution and can maintain good long-drain properties over a long period of time. Furthermore, the lubricating oil composition according to a more preferred embodiment of the present invention has an effect of suppressing copper elution and is excellent in high-temperature cleanliness. Since it has such characteristics, the lubricating oil composition of one embodiment of the present invention can be suitably used for lubricating an internal combustion engine of a hybrid system.
  • the performance showing the effect of suppressing copper elution may be expressed as copper elution resistance.
  • the upper and lower limits can be arbitrarily combined.
  • a numerical range is described as "preferably 30 to 100, more preferably 40 to 80"
  • the range of "30 to 80” and the range of "40 to 100” are also described in this specification. Included in the specified numerical range.
  • the description "60 to 100” means a range of "60 or more (60 or more than 60) and 100 or less (100 or less than 100)". do.
  • the numerical range from the lower limit value to the upper limit value can be defined by appropriately selecting from each option and combining them arbitrarily.
  • a plurality of the various requirements described as preferred embodiments described herein can be combined.
  • kinematic viscosity and viscosity index mean values measured and calculated in accordance with JIS K2283:2000.
  • the contents of alkali metals, alkaline earth metals, zinc atoms (Zn), molybdenum atoms (Mo), phosphorus atoms (P) and boron atoms (B) were measured in accordance with JPI-5S-38-92. means value.
  • the nitrogen atom (N) content means a value measured in accordance with JIS K2609:1998.
  • the base number is specified in 7. of JIS K2501 "Petroleum products and lubricating oils - Neutralization number test method". It means the base number measured by the hydrochloric acid method according to .
  • composition of lubricating oil composition contains a base oil (A), a hindered amine compound (B), and an organic zinc dithiophosphate (C) having at least one primary alkyl group.
  • the internal combustion engine of a hybrid vehicle is equipped with an electric motor as well as an internal combustion engine. Compared to the internal combustion engine of a conventional vehicle, the internal combustion engine of a hybrid vehicle is stopped for a longer period of time even when the vehicle is in use, and condensation can form inside the crankcase. Easy to occur. Therefore, lubricating oil compositions used in hybrid systems such as hybrid vehicles are likely to contain moisture, and this moisture tends to cause a decline in long-drain properties. Incidentally, alloys containing copper are sometimes used in various members constituting internal combustion engines. According to studies conducted by the present inventors, it has been found that when copper from alloys constituting various members is eluted into a lubricating oil composition, corrosive wear may occur.
  • the lubricating oil composition of one embodiment of the present invention may further contain molybdenum dithiocarbamate (D).
  • the lubricating oil composition of one embodiment of the present invention may further contain an antioxidant (E) that does not fall under component (B).
  • the lubricating oil composition of one embodiment of the present invention may further contain an imide compound (F).
  • the lubricating oil composition of one embodiment of the present invention may further contain a metal-based detergent (G).
  • the lubricating oil composition of one embodiment of the present invention may further contain other lubricating oil additives other than the above-mentioned components (B) to (G) within a range that does not impair the effects of the present invention.
  • the total content of components (A), (B), and (C) is preferably 50% by mass based on the total amount (100% by mass) of the lubricating oil composition. More preferably 60% by mass or more, still more preferably 65% by mass or more, even more preferably 70% by mass or more, particularly preferably 75% by mass or more, and 100% by mass or less, 99.99% by mass or less , 99.90% by mass or less, 99.50% by mass or less, 99.0% by mass or less, 98.0% by mass or less, 97.0% by mass or less, 95.0% by mass or less, 92.0% by mass or less, Alternatively, it may be 91.0% by mass or less.
  • the total content of components (A), (B), (C), (D), (E), (F), and (G) is Based on the total amount (100% by mass) of the product, preferably 60% by mass or more, more preferably 65% by mass or more, even more preferably 70% by mass or more, even more preferably 75% by mass or more, particularly preferably 80% by mass or more.
  • the content may also be 100% by mass or less, 99.99% by mass or less, 99.90% by mass or less, 99.50% by mass or less, or 99.0% by mass or less.
  • the base oil used as component (A) may be one or more selected from mineral oils and synthetic oils.
  • Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; and distillate oils obtained by vacuum distillation of these atmospheric residual oils. Refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining; and the like.
  • Synthetic oils include, for example, polyolefins such as ⁇ -olefin homopolymers or ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
  • ⁇ -olefins polyolefins
  • isoparaffins polyalkylene glycols
  • ester oils such as polyol esters, dibasic acid esters, and phosphoric acid esters
  • ether oils such as polyphenyl ethers; alkylbenzenes; alkylnaphthalenes
  • Examples include synthetic oil (GTL) obtained by isomerizing manufactured wax (GTL wax (Gas To Liquids WAX)).
  • Component (A) used in one embodiment of the present invention is preferably one or more selected from mineral oils and synthetic oils classified into Group II and Group III of the API (American Petroleum Institute) base oil category.
  • the kinematic viscosity at 40°C of component (A) used in one aspect of the present invention is preferably 3.0 to 120 mm 2 /s, more preferably 3.5 to 100 mm 2 /s, and still more preferably 4.0 to 70 mm. 2 /s, more preferably 4.5 to 50 mm 2 /s, particularly preferably 5.0 to 30 mm 2 /s.
  • the viscosity index of component (A) used in one aspect of the present invention is preferably 70 or more, more preferably 90 or more, even more preferably 100 or more, even more preferably 110 or more, particularly preferably 120 or more.
  • the kinematic viscosity and viscosity index of the mixed oil are within the above ranges.
  • the content of component (A) is preferably 40% by mass or more, more preferably 50% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. , more preferably 60% by mass or more, even more preferably 65% by mass or more, particularly preferably 70% by mass or more, furthermore, it may be 75% by mass or more, or 80% by mass or more, and 99.4% by mass % or less, 99.0 mass% or less, 97.0 mass% or less, 95.0 mass% or less, 92.0 mass% or less, or 90.0 mass% or less.
  • the lubricating oil composition of one embodiment of the present invention contains a hindered amine compound as component (B). By containing component (B), a lubricating oil composition with improved long drain properties can be obtained.
  • Component (B) used in one aspect of the present invention may be used alone or in combination of two or more.
  • the hindered amine compound used as component (B) may be any compound containing a structure represented by the following formula (b-0).
  • *1 and *2 indicate bonding positions with other atoms.
  • Component (B) used in one embodiment of the present invention is 1 selected from a compound (B1) represented by the following general formula (b-1) and a compound (B2) represented by the following general formula (b-2). It is preferable to include more than one species.
  • R b1 is each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.
  • R b2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 18 ring carbon atoms, an aryl group having 6 to 18 ring carbon atoms, or a hydroxyl group.
  • R b3 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms).
  • Z is an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group having 3 to 18 ring carbon atoms, an arylene group having 6 to 18 ring carbon atoms, an oxygen atom, or a sulfur atom. , or a group represented by -O-CO-(CH 2 ) n -CO-O- (n is an integer of 1 to 20).
  • Examples of the alkyl group that can be selected as R b1 include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group). , isobutyl group), pentyl group, hexyl group, 2-ethylhexyl group, heptyl group, octyl group, nonyl group, decyl group, etc.
  • the alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group.
  • the number of carbon atoms in the alkyl group that can be selected as R b1 is preferably 1 to 10, more preferably 1 to 6, and still more preferably 1 to 3.
  • Examples of the alkoxy group that can be selected as R b1 include methoxy group, ethoxy group, propoxy group (n-propoxy group, isopropoxy group), butoxy group (n-butoxy group, s-butoxy group, t-butoxy group). group, isobutoxy group), pentyloxy group, hexyloxy group, 2-ethylhexyloxy group, heptyloxy group, octyloxy group, nonyloxy group, decyloxy group, -(CH 2 ) n - (n is 1 -20 integers), etc.
  • the alkoxy group may be a straight-chain alkoxy group or a branched-chain alkoxy group.
  • the number of carbon atoms in the alkoxy group that can be selected as R b1 is preferably 1 to 10, more preferably 1 to 6, and still more preferably 1 to 3.
  • Examples of the alkyl group that can be selected as R b2 include, in addition to the above-mentioned alkyl groups having 1 to 10 carbon atoms that can be selected as R b1 , for example, undecyl group, dodecyl group, tridecyl, tetradecyl group, hexadecyl group, octadecyl group. Examples include groups.
  • the alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group.
  • the number of carbon atoms in the alkyl group that can be selected as R b2 is preferably 1 to 20, more preferably 3 to 18, still more preferably 6 to 16, even more preferably 8 to 14.
  • Examples of the cycloalkyl group that can be selected as R b2 include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, and an adamantyl group.
  • the number of ring carbon atoms in the cycloalkyl group that can be selected as R b2 is preferably 3 to 18, more preferably 5 to 15, and still more preferably 6 to 12.
  • Examples of the aryl group that can be selected as R b2 include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, a phenylnaphthyl group, and the like.
  • the number of ring carbon atoms in the aryl group that can be selected as R b2 is preferably 6 to 18, more preferably 6 to 15, and still more preferably 6 to 12.
  • alkylene group that can be selected as Z examples include methylene group, 1,1-ethylene group, 1,2-ethylene group, 1,3-propylene, 1,2-propylene, 2,2-propylene, etc.
  • Examples of the cycloalkylene group that can be selected as Z include a cyclopropylene group, a cyclobutylene group, a cyclopentylene group, a cyclohexylene group, a cycloheptylene group, a cyclooctylene group, and an adamantylene group.
  • Examples of the arylene group that can be selected as Z include a phenylene group, a naphthylene group, an anthrylene group, a phenanthrylene group, a biphenylene group, and a terphenylene group.
  • Component (B) used in one embodiment of the present invention is selected from a compound (B11) represented by the following general formula (b-11) and a compound (B21) represented by the following general formula (b-21). It is more preferable to include more than one species.
  • R b1 is each independently a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. Specific examples of the alkyl group that can be selected as R b1 and the preferred range of the number of carbon atoms are as described above.
  • R b3 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.
  • n is an integer of 1 to 20.
  • the hydrocarbon group that can be selected as R b3 includes a ring-forming carbon group optionally substituted with an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, and an alkyl group having 1 to 10 carbon atoms.
  • Examples include a cycloalkyl group having 3 to 18 carbon atoms, an aryl group having 6 to 18 ring carbon atoms which may be substituted with an alkyl group having 1 to 10 carbon atoms, and an arylalkyl group having 7 to 19 carbon atoms.
  • the alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group.
  • the alkenyl group may be a straight chain alkenyl group or a branched chain alkenyl group.
  • Examples of the alkyl group, cycloalkyl group, and aryl group that can be selected as R b3 include the same groups as the alkyl group, cycloalkyl group, and aryl group that can be selected as R b2 .
  • Examples of the alkenyl group that can be selected as R b3 include ethenyl group (vinyl group), propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, dodecenyl group.
  • R b3 examples include phenylmethyl group, phenylethyl group, naphthylmethyl group, naphthylethyl group, and the like.
  • R b3 is preferably an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 2 to 20 carbon atoms, and more preferably an alkyl group having 1 to 20 carbon atoms.
  • the number of carbon atoms in the alkyl group that can be selected as R b3 is preferably 3 to 20, more preferably 4 to 18, still more preferably 6 to 16, even more preferably 8 to 14.
  • the alkenyl group that can be selected as R b3 preferably has 2 to 20 carbon atoms, more preferably 3 to 18 carbon atoms, and still more preferably 6 to 16 carbon atoms.
  • the component (B) used in one aspect of the present invention may contain at least the compound (B1) represented by the general formula (b-1) from the viewpoint of providing a lubricating oil composition with improved high-temperature cleanliness.
  • it preferably contains at least the compound (B11) represented by the general formula (b-11).
  • the content ratio of component (B1) or (B11) in component (B) is the total amount (100% by mass) of component (B) contained in the lubricating oil composition.
  • a lubricating oil composition with improved high-temperature cleanliness on a standard basis preferably 40 to 100% by mass or more, more preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and even more preferably The content is 70 to 100% by weight, more preferably 80 to 100% by weight, even more preferably 90 to 100% by weight, particularly preferably 95 to 100% by weight.
  • the content of component (B) is determined based on the total amount (100% by mass) of the lubricating oil composition, which provides a lubricating oil composition with better long drain properties.
  • the content of component (B) is determined based on the total amount (100% by mass) of the lubricating oil composition, which provides a lubricating oil composition with better long drain properties.
  • a product preferably 0.60% by mass or more, more preferably 0.65% by mass or more, more preferably 0.70% by mass or more, more preferably 0.85% by mass or more, and more preferably 1. 00% by mass or more, more preferably 1.20% by mass or more, even more preferably 1.40% by mass or more, still more preferably 1.70% by mass or more, even more preferably 2.00% by mass or more, even more preferably 2.00% by mass or more.
  • the content is 10% by mass or more, even more preferably 2.20% by mass or more, even more preferably 2.50% by mass or more, particularly preferably 2.55% by mass or more, and also maintains high temperature cleanliness better.
  • a lubricating oil composition preferably 10.0% by mass or less, more preferably 9.5% by mass or less, more preferably 9.0% by mass or less, still more preferably 8.5% by mass or less, and Preferably 8.0% by mass or less, even more preferably 7.5% by mass or less, particularly preferably 7.0% by mass or less, further preferably 6.5% by mass or less, 6.0% by mass or less, 5.
  • the content of component (B) in terms of nitrogen atoms is based on the total amount (100% by mass) of the lubricating oil composition, and the lubricating oil composition has better long drain properties.
  • the content is .070% by mass or more, more preferably 0.080% by mass or more, even more preferably 0.090% by mass or more, particularly preferably 0.100% by mass or more, and also maintains high temperature cleanliness better.
  • a lubricating oil composition preferably 0.60% by mass or less, more preferably 0.50% by mass or less, more preferably 0.45% by mass or less, still more preferably 0.42% by mass or less, and Preferably it is 0.40% by mass or less, even more preferably 0.37% by mass or less, particularly preferably 0.35% by mass or less, further preferably 0.32% by mass or less, 0.30% by mass or less, 0. It may be 27% by mass or less, 0.25% by mass or less, 0.22% by mass or less, or 0.20% by mass or less.
  • the lubricating oil composition of one embodiment of the present invention contains organic zinc dithiophosphate (hereinafter also referred to as "ZnDTP") having at least one primary alkyl group as component (C). By containing component (C), a lubricating oil composition with improved copper elution resistance can be obtained.
  • component (C) may be used alone or in combination of two or more.
  • Component (C) used in one embodiment of the present invention may be ZnDTP having at least one primary alkyl group, and ZnDTP having an alkyl group other than the primary alkyl group or a hydrocarbon group other than the alkyl group. It may be.
  • the component (C) used in one embodiment of the present invention contains a compound (C1) represented by the following general formula (c-1). It is preferable.
  • R c1 to R c4 are each independently a primary alkyl group.
  • component (C1) in which all of the substituents R c1 to R c4 are primary alkyl groups a lubricating oil composition with improved copper elution resistance can be obtained.
  • the content ratio of component (C1) in component (C) used in one aspect of the present invention is preferably based on the total amount (100% by mass) of component (C) contained in the lubricating oil composition. 60 to 100% by mass, more preferably 70 to 100% by mass, more preferably 80 to 100% by mass, even more preferably 85 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass. %.
  • the number of carbon atoms in the primary alkyl group that can be selected as R c1 to R c4 is preferably 1 to 7, more preferably 2 to 7, from the viewpoint of providing a lubricating oil composition with improved copper elution resistance. , more preferably 3 to 7, even more preferably 4 to 7.
  • Examples of the primary alkyl group that can be selected as R c1 to R c4 include groups represented by the following general formula (ci).
  • R c is a hydrogen atom or an alkyl group, and the alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group.
  • the number of carbon atoms in the alkyl group that can be selected as R c is preferably 1 to 6, more preferably 2 to 6, and still more preferably 3 to 5.
  • Examples of the alkyl group that can be selected as R c include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group).
  • isobutyl group isobutyl group
  • pentyl group n-pentyl group, 1-methylbutyl group, 2-methylbutyl group, 3-methylbutyl group, 1-ethylpropyl group, 1,1-dimethylpropyl group, 1,2-dimethylpropyl group, 2,2-dimethylpropyl group
  • hexyl group n-hexyl group, 2-methylpentyl group, 3-methylpentyl group, 2,2-dimethylbutyl group, 2,3-dimethylbutyl group
  • the content of component (C) is based on the total amount (100% by mass) of the lubricating oil composition, and the lubricating oil composition has improved copper elution resistance.
  • the lubricating oil composition has improved copper elution resistance.
  • % or more even more preferably 0.70% by mass or more, even more preferably 0.80% by mass or more, particularly preferably 0.90% by mass or more, and also has good high temperature detergency.
  • 3.0% by mass or less preferably 7.0% by mass or less, more preferably 6.0% by mass or less, more preferably 5.0% by mass or less, still more preferably 4.0% by mass or less, even more preferably 3.0% by mass or less. It is 0% by mass or less, particularly preferably 2.0% by mass or less.
  • the content of component (C) in terms of zinc atoms is based on the total amount (100% by mass) of the lubricating oil composition, which further improves copper elution resistance.
  • a lubricating oil composition preferably 0.005% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, especially It is preferably 0.07% by mass or more, and from the viewpoint of providing a lubricating oil composition with good high-temperature cleanability, it is preferably 0.70% by mass or less, more preferably 0.50% by mass or less, and even more preferably is 0.30% by mass or less, even more preferably 0.20% by mass or less, particularly preferably 0.15% by mass or less.
  • component (B) and component (C) are combined to further improve high-temperature cleanliness and to provide a lubricating oil composition with further improved copper elution resistance.
  • the content ratio [(B)/(C)] is a mass ratio, preferably 0.5 or more, more preferably 0.7 or more, more preferably 1.0 or more, still more preferably 1.2 or more, and Preferably 1.5 or more, even more preferably 1.7 or more, even more preferably 2.0 or more, particularly preferably 2.2 or more, and preferably 10.0 or less, more preferably 8.00 or less, more preferably 7.00 or less, more preferably 6.00 or less, still more preferably 5.50 or less, even more preferably 5.00 or less, even more preferably 4.50 or less, even more preferably 4.00 It is particularly preferably 3.50 or less.
  • the lubricating oil composition of one embodiment of the present invention may contain zinc organic dithiophosphate, which does not fall under component (C), to the extent that the effects of the present invention are not impaired.
  • the organic zinc dithiophosphate that does not fall under component (C) is ZnDTP that does not have a primary alkyl group, and includes, for example, ZnDTP in which all substituents are secondary alkyl groups.
  • the content of organic zinc dithiophosphate, which does not fall under component (C), be as small as possible, and it is more preferable that it be substantially absent. preferable.
  • the phrase "does not substantially contain zinc organic dithiophosphate, which does not fall under component (C)" is a provision that negates the mode of blending and containing the organic zinc dithiophosphate for a predetermined purpose. However, this provision does not negate an embodiment in which the organic zinc dithiophosphate is mixed or present unintentionally or unavoidably.
  • the content of organic zinc dithiophosphate, which does not fall under component (C), is preferably 0.001 mass% based on the total amount (100% by mass) of the lubricating oil composition. %, more preferably less than 0.0001% by weight, even more preferably less than 0.00001% by weight.
  • the content of organic zinc dithiophosphate, which does not fall under component (C) is as follows: Preferably less than 10 parts by weight, more preferably less than 5 parts by weight, more preferably less than 1 part by weight, even more preferably less than 0.1 parts by weight, even more preferably less than 0.01 parts by weight, even more preferably 0.001 parts by weight. It is less than 0.0001 parts by weight, particularly preferably less than 0.0001 parts by weight.
  • the lubricating oil composition of one embodiment of the present invention may contain molybdenum dithiocarbamate as component (D). By containing component (D), a lubricating oil composition with improved copper elution resistance can be obtained. In one embodiment of the present invention, component (D) may be used alone or in combination of two or more.
  • Component (D) used in one embodiment of the present invention includes dinuclear molybdenum dithiocarbamate containing two molybdenum atoms in one molecule, and trinuclear molybdenum dithiocarbamate containing three molybdenum atoms in one molecule. and dinuclear molybdenum dithiocarbamate is preferred.
  • Component (D) used in one embodiment of the present invention is 1 selected from a compound (D1) represented by the following general formula (d-1) and a compound (D2) represented by the following general formula (d-2). It is preferable to include more than one species.
  • R d1 to R d4 each independently represent a hydrocarbon group, and may be the same or different from each other.
  • X 1 to X 8 each independently represent an oxygen atom or a sulfur atom, and may be the same or different. However, at least one of X 1 to X 8 in formula (d-1) is a sulfur atom. In one embodiment of the present invention, it is preferable that X 1 and X 2 in formula (d-1) are oxygen atoms, and X 3 to X 8 are sulfur atoms. Further, it is preferable that X 1 to X 4 in formula (d-2) are oxygen atoms.
  • the molar ratio of sulfur atoms to oxygen atoms in X 1 to X 8 [sulfur atoms/oxygen atoms] is preferably 1/4 to 4. /1, more preferably 1/3 to 3/1.
  • the hydrocarbon groups that can be selected as R d1 to R d4 include, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, Alkyl groups such as hexyl group, heptyl group, octyl group, isooctyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group; octenyl alkenyl groups such as nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecen
  • the number of carbon atoms in the hydrocarbon group which can be selected as R d1 to R d4 , is preferably 1 to 20, more preferably 3 to 18, from the viewpoint of providing a lubricating oil composition with improved copper elution resistance. More preferably 5 to 16, even more preferably 8 to 14, particularly preferably 8 or 13.
  • R d1 to R d1 in the above general formulas (d-1) and (d-2) are used as component (D) in one embodiment of the present invention.
  • R d4 is an alkyl group
  • the molar ratio [( ⁇ )/( ⁇ )] of 11 to 20, more preferably 11 to 16, even more preferably 12 to 14) to the alkyl group ( ⁇ ) is preferably 1/7 to 7/1, more preferably 1/7 to 7/1.
  • the content of component (D) is based on the total amount (100% by mass) of the lubricating oil composition, and the lubricating oil composition has improved copper elution resistance. From the viewpoint of mass% or more, and 5.0 mass% or less, 4.0 mass% or less, 3.0 mass% or less, 2.0 mass% or less, 1.5 mass% or less, or 1.0 mass% or less You can also use it as
  • the content of component (D) in terms of molybdenum atoms is based on the total amount (100% by mass) of the lubricating oil composition, which further improves copper elution resistance.
  • a lubricating oil composition preferably 0.01% by mass or more, more preferably 0.02% by mass or more, still more preferably 0.03% by mass or more, even more preferably 0.04% by mass or more, especially It is preferably 0.05% by mass or more, and can also be 0.70% by mass or less, 0.50% by mass or less, 0.30% by mass or less, 0.20% by mass or less, or 0.10% by mass or less. good.
  • the lubricating oil composition of one embodiment of the present invention may contain molybdenum dithiophosphate to the extent that the effects of the present invention are not impaired.
  • molybdenum dithiophosphate include compounds represented by the following general formula (d'-i) and compounds represented by the following general formula (d'-ii).
  • R d11 to R d14 each independently represent a hydrocarbon group, and may be the same or different from each other.
  • X 11 to X 18 each independently represent an oxygen atom or a sulfur atom, and may be the same or different. However, at least two of X 11 to X 18 in formula (d'-i) are sulfur atoms.
  • the content of molybdenum dithiophosphate is small, and it is more preferable that it is substantially not contained.
  • "not substantially containing molybdenum dithiophosphate” is a provision that negates the mode of blending and containing molybdenum dithiophosphate for a predetermined purpose; However, the provision does not negate an embodiment in which the molybdenum dithiophosphate is mixed or present.
  • the content of molybdenum dithiophosphate is preferably less than 0.001% by mass, more preferably 0.0001% by mass, based on the total amount (100% by mass) of the lubricating oil composition. It is less than 0.00001% by weight, more preferably less than 0.00001% by weight.
  • the content of molybdenum dithiophosphate is preferably less than 10 parts by mass, more preferably less than 10 parts by mass of the total amount of component (C) contained in the lubricating oil composition. is less than 5 parts by weight, more preferably less than 1 part by weight, even more preferably less than 0.1 part by weight, even more preferably less than 0.01 part by weight, even more preferably less than 0.001 part by weight, particularly preferably 0. It is less than 0,001 parts by mass.
  • the lubricating oil composition of one embodiment of the present invention contains an antioxidant that does not fall under component (B) as component (E) from the viewpoint of providing a lubricating oil composition with further improved high-temperature cleanliness. Good too.
  • the component (E) used in one embodiment of the present invention include amine antioxidants other than hindered amine compounds, phenolic antioxidants, sulfur antioxidants, phosphorus antioxidants, and the like. In one embodiment of the present invention, component (E) may be used alone or in combination of two or more.
  • Component (E) used in one aspect of the present invention preferably contains one or more selected from amine antioxidants (E1) and phenolic antioxidants (E2) that do not fall under component (B), It is more preferable to include both component (E1) and component (E2).
  • the total content of components (E1) and (E2) in component (E) used in one aspect of the present invention is preferably based on the total amount (100% by mass) of component (E) contained in the lubricating oil composition. is 60 to 100% by mass, more preferably 70 to 100% by mass, more preferably 80 to 100% by mass, even more preferably 85 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass. Mass%.
  • component (E) used in one embodiment of the present invention contains both components (E1) and (E2)
  • the content ratio of component (E1) and component (E2) [(E1)/(E2)] is a mass ratio, preferably 0.10 to 5.0, more preferably 0.30 to 4.5, more preferably 0.50 to 4.0, even more preferably 0.75 to 3.5, More preferably 1.0 to 3.0, particularly preferably 1.2 to 2.7.
  • the component (E1) used in one embodiment of the present invention includes, for example, diphenylamine-based oxidized diphenylamine such as diphenylamine, alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms (preferably 6 to 16 carbon atoms, and more preferably 8 to 12 carbon atoms). Inhibitor; naphthylamine-based antioxidant such as ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, substituted phenyl- ⁇ -naphthylamine having an alkyl group having 3 to 20 carbon atoms (preferably 6 to 16, more preferably 8 to 12). ; etc.
  • diphenylamine-based oxidized diphenylamine such as diphenylamine, alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms (preferably 6 to 16 carbon atoms, and more preferably 8 to 12 carbon atoms).
  • Inhibitor nap
  • Examples of the component (E2) used in one embodiment of the present invention include 2,6-di-t-butylphenol, 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butylphenol, and 2,6-di-t-butylphenol.
  • the content of component (E) is preferably 0.01% by mass or more, more preferably 0.01% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. 05% by mass or more, more preferably 0.10% by mass or more, even more preferably 0.30% by mass or more, even more preferably 0.50% by mass or more, even more preferably 0.70% by mass or more, particularly preferably 1 .00 mass% or more, and 10.0 mass% or less, 8.0 mass% or less, 6.0 mass% or less, 5.0 mass% or less, 4.0 mass% or less, 3.0 mass% It may be less than or equal to 2.0% by mass.
  • the ratio [(E)/(B)] between component (E) and component (B) is preferably 0.10 or more, more preferably 0. .20 or more, more preferably 0.30 or more, even more preferably 0.40 or more, particularly preferably 0.45 or more, and preferably 6.0 or less, more preferably 5.0 or less, even more preferably is 4.0 or less, more preferably 3.0 or less, particularly preferably 2.0 or less.
  • the content of component (E1) is preferably 0.01% by mass or more, more preferably 0.01% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. 05% by mass or more, more preferably 0.10% by mass or more, even more preferably 0.20% by mass or more, even more preferably 0.30% by mass or more, even more preferably 0.50% by mass or more, particularly preferably 0
  • the content may be .70% by mass or more, and may also be 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, or 1.5% by mass or less.
  • the ratio [(E1)/(B)] between component (E1) and component (B) is preferably 0.05 or more, more preferably 0. .10 or more, more preferably 0.20 or more, even more preferably 0.25 or more, particularly preferably 0.30 or more, and preferably 5.0 or less, more preferably 4.0 or less, even more preferably is 3.0 or less, more preferably 2.0 or less, particularly preferably 1.0 or less.
  • the content of component (E2) is preferably 0.01% by mass or more, more preferably 0.01% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. 05% by mass or more, more preferably 0.10% by mass or more, even more preferably 0.20% by mass or more, even more preferably 0.30% by mass or more, particularly preferably 0.40% by mass or more, and It may be 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, or 1.0% by mass or less.
  • the ratio [(E2)/(B)] between component (E2) and component (B) is preferably 0.01 or more, more preferably 0. .05 or more, more preferably 0.10 or more, even more preferably 0.12 or more, particularly preferably 0.15 or more, and preferably 3.0 or less, more preferably 2.0 or less, even more preferably is 1.0 or less, more preferably 0.70 or less, particularly preferably 0.50 or less.
  • the lubricating oil composition of one embodiment of the present invention may contain an imide compound as component (F). By containing component (F), a lubricating oil composition that can suppress sludge precipitation can be obtained.
  • component (F) may be used alone or in combination of two or more.
  • imide compound means a compound having an imide structure represented by the following formula (f-0), and includes a chain compound having the imide structure and a cyclic compound having the imide structure. Also included. (In the above formula, * indicates the bonding position.)
  • Component (F) used in one embodiment of the present invention is a modified imide compound reacted with one or more selected from boron compounds, alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, organic acids, etc. Alternatively, it may be a non-modified imide compound.
  • Component (F) used in one embodiment of the present invention preferably contains one or more selected from alkenyl succinimides and modified products thereof, including non-boron-modified alkenyl succinimides (F1) and boron-modified alkenyl succinimides. It is more preferable to contain one or more selected from (F2), and even more preferable to contain both components (F1) and (F2).
  • the total content of components (F1) and (F2) in component (F) used in one aspect of the present invention is preferably based on the total amount (100% by mass) of component (F) contained in the lubricating oil composition. is 60 to 100% by mass, more preferably 70 to 100% by mass, more preferably 80 to 100% by mass, even more preferably 85 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass. Mass%.
  • Examples of the non-boron-modified alkenylsuccinimide (F1) include alkenylsuccinic acid bisimide (F11) represented by the following general formula (f-1) and alkenylsuccinic acid monoimide (F11) represented by the following general formula (f-2).
  • One or more types selected from F12) are preferred.
  • R f1 , R f2 and R f3 are each independently an alkenyl group having a mass average molecular weight (Mw) of 500 to 3000 (preferably 900 to 2500). It is.
  • alkenyl group that can be selected as R f1 , R f2 and R f3 include a polybutenyl group, a polyisobutenyl group, an ethylene-propylene copolymer, and among these, a polybutenyl group or a polyisobutenyl group is preferred.
  • a f1 , A f2 and A f3 are each independently an alkylene group having 2 to 5 carbon atoms.
  • z1 is an integer of 0 to 10, preferably an integer of 1 to 4, more preferably 2 or 3.
  • z2 is an integer of 1 to 10, preferably an integer of 2 to 5, more preferably 3 or 4.
  • Examples of the boron-modified alkenylsuccinimide (F2) used in one embodiment of the present invention include a boron-modified alkenylsuccinimide bisimide represented by the above general formula (f-1), and the following general formula (f- Examples include boron-modified alkenylsuccinic acid monoimide represented by 2).
  • the ratio [B/N] of boron atoms and nitrogen atoms constituting component (F2) is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.3. Above, it is even more preferably 0.5 or more, particularly preferably 0.7 or more.
  • the content ratio [(F1)/(F2)] of component (F1) and component (F2) is preferably 0 in terms of mass ratio. .10 or more, more preferably 0.50 or more, even more preferably 0.70 or more, even more preferably 1.00 or more, particularly preferably 1.20 or more, and preferably less than 5.00, more preferably is less than 4.00, more preferably less than 3.00, even more preferably less than 2.50, particularly preferably less than 2.00.
  • the content ratio [B/N] of boron atoms derived from component (F2) to nitrogen atoms derived from component (F) is preferably 0.01 or more, more preferably 0.05 or more, still more preferably 0.10 or more, even more preferably 0.20 or more, particularly preferably 0.30 or more, and preferably 0.90 or more, It is preferably 0.80 or less, more preferably 0.70 or less, even more preferably 0.60 or less, particularly preferably 0.55 or less.
  • the content of component (F) is preferably 0.50% by mass or more, more preferably 1.5% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition.
  • 0% by mass or more more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, particularly preferably 4.0% by mass or more, and preferably 12.0% by mass or less, more preferably
  • it is 10.0% by mass or less, more preferably 9.0% by mass or less, even more preferably 8.5% by mass or less, particularly preferably 8.0% by mass or less.
  • the content of component (F) in terms of nitrogen atoms is preferably 0.010 to 0.200 based on the total amount (100% by mass) of the lubricating oil composition. % by mass, more preferably 0.020-0.170% by mass, even more preferably 0.030-0.130% by mass, even more preferably 0.040-0.100% by mass, particularly preferably 0.050-0.050% by mass. It is 0.090% by mass.
  • the content of component (F1) is preferably 0.10% by mass or more, more preferably 0.10% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition.
  • the content of component (F1) in terms of nitrogen atoms is preferably 0.005 to 0.150 based on the total amount (100% by mass) of the lubricating oil composition. mass%, more preferably 0.010 to 0.120 mass%, still more preferably 0.015 to 0.100 mass%, even more preferably 0.020 to 0.080 mass%, particularly preferably 0.025 to 0.025 mass% It is 0.070% by mass.
  • the content of component (F2) is preferably 0.10% by mass or more, more preferably 0.10% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. 30% by mass or more, more preferably 0.50% by mass or more, even more preferably 1.0% by mass or more, particularly preferably 1.5% by mass or more, and preferably 8.0% by mass or less, more preferably Preferably it is 7.0% by mass or less, more preferably 6.0% by mass or less, even more preferably 5.0% by mass or less, particularly preferably 4.0% by mass or less.
  • the content of component (F2) in terms of boron atoms is preferably 0.001 to 0.100 based on the total amount (100% by mass) of the lubricating oil composition. % by mass, more preferably 0.005-0.090% by mass, even more preferably 0.010-0.080% by mass, even more preferably 0.015-0.070% by mass, particularly preferably 0.020-0.020% by mass. It is 0.060% by mass.
  • the lubricating oil composition of one embodiment of the present invention may contain a metal detergent as component (G). By containing component (G), a lubricating oil composition with better high-temperature cleanliness can be obtained. In one embodiment of the present invention, component (G) may be used alone or in combination of two or more.
  • Component (G) used in one embodiment of the present invention includes metal salts such as metal sulfonates, metal salicylates, and metal phenates.
  • the metal atoms constituting the metal salt are preferably metal atoms selected from alkali metals and alkaline earth metals, more preferably sodium, calcium, magnesium, or barium, and still more preferably calcium.
  • Component (G) used in one aspect of the present invention preferably contains one or more selected from calcium sulfonate, calcium salicylate, and calcium phenate, and more preferably contains calcium salicylate.
  • the content of calcium salicylate is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, even more preferably 70% by mass, based on the total amount (100% by mass) of the metal detergent contained in the lubricating oil composition. ⁇ 100% by weight, more preferably 80 ⁇ 100% by weight.
  • the base number of the metal detergent is preferably 0 to 600 mgKOH/g.
  • the component (G) used in one embodiment of the present invention may be a neutral metal-based detergent or an overbased metal-based detergent.
  • a neutral metallic detergent means a metallic detergent with a base number of 0 to 100 mgKOH/g or more
  • an overbased metallic detergent refers to a detergent with a base number of more than 100 mgKOH/g. means a metal-based cleaning agent.
  • the content of component (G) is preferably 0.10% by mass or more, more preferably 0.10% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. 30% by mass or more, more preferably 0.50% by mass or more, more preferably 0.70% by mass or more, even more preferably 1.00% by mass or more, even more preferably 1.20% by mass or more, even more preferably 1.
  • 50% by mass or more even more preferably 1.70% by mass or more, particularly preferably 1.90% by mass or more, and preferably 10.0% by mass or less, more preferably 8.0% by mass or less, and more Preferably it is 7.0% by mass or less, more preferably 6.0% by mass or less, even more preferably 5.0% by mass or less, particularly preferably 4.0% by mass or less.
  • the content of component (G) in terms of calcium atoms is preferably 50 mass ppm or more, more preferably is 100 mass ppm or more, more preferably 150 mass ppm or more, more preferably 200 mass ppm or more, even more preferably 250 mass ppm or more, still more preferably 300 mass ppm or more, still more preferably 350 mass ppm or more, even more preferably 400 mass ppm or more, particularly preferably 450 mass ppm or more, and preferably 3000 mass ppm or less, more preferably 2500 mass ppm or less, more preferably 2000 mass ppm or less, still more preferably 1500 mass ppm or less, and even more Preferably it is 1000 mass ppm or less, particularly preferably 800 mass ppm or less.
  • the lubricating oil composition of one embodiment of the present invention may further contain lubricating oil additives other than components (B) to (G), as necessary, within a range that does not impair the effects of the present invention.
  • lubricating oil additives include pour point depressants, viscosity index improvers, friction modifiers, antiwear agents, extreme pressure agents, metal deactivators, oil agents, rust preventives, and antifoaming agents. agents, etc. These lubricating oil additives may be used alone or in combination of two or more.
  • each of these lubricating oil additives can be adjusted as appropriate within a range that does not impair the effects of the present invention, but the content of each additive is based on the total amount (100% by mass) of the lubricating oil composition.
  • the amount for each agent is usually 0.001 to 15% by weight, preferably 0.005 to 10% by weight, and more preferably 0.01 to 5% by weight.
  • the lubricating oil composition of one aspect of the present invention may further contain a pour point depressant.
  • the pour point depressants may be used alone or in combination of two or more.
  • Examples of pour point depressants used in one embodiment of the present invention include ethylene-vinyl acetate copolymers, condensates of chlorinated paraffins and naphthalene, condensates of chlorinated paraffins and phenols, polymethacrylates, and polyalkylstyrenes. etc.
  • the mass average molecular weight (Mw) of the pour point depressant used in one aspect of the present invention is 5,000 or more, 7,000 or more, 10,000 or more, 15,000 or more, 20,000 or more, 25,000 or more, 30,000 or more, 35,000 or more, 40,000 or more, 45,000 or more, 50,000 or more, 55,000 or more, or 60,000 or more, and 150,000 or less, 120,000 or less , 100,000 or less, 90,000 or less, or 80,000 or less.
  • the lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver.
  • the viscosity index improvers may be used alone or in combination of two or more.
  • Examples of the viscosity index improver used in one embodiment of the present invention include non-dispersed polymethacrylate, dispersed polymethacrylate, olefin copolymer (e.g., ethylene-propylene copolymer, etc.), and dispersed olefin copolymer.
  • the weight average molecular weight (Mw) of the viscosity index improver used in one aspect of the present invention may be 5,000 or more, 7,000 or more, 10,000 or more, 15,000 or more, or 20,000 or more; , 1,000,000 or less, 700,000 or less, 500,000 or less, 300,000 or less, 200,000 or less, 100,000 or less, or 50,000 or less.
  • the lubricating oil composition of one embodiment of the present invention may further contain a friction modifier or an antiwear agent.
  • the friction modifier or anti-wear agent may be used alone or in combination of two or more.
  • Examples of friction modifiers and antiwear agents used in one embodiment of the present invention include sulfur-based compounds such as sulfurized olefins, dialkyl polysulfides, diarylalkyl polysulfides, and diaryl polysulfides; Phosphorous compounds such as acid esters, thiophosphoric acid esters, phosphite esters, alkyl hydrogen phosphites, phosphoric acid ester amine salts, phosphite ester amine salts; fatty acid esters, fatty acid amides, fatty acids, aliphatic alcohols, aliphatic ethers , urea compounds, hydrazide compounds, and other ashless friction modifiers.
  • the lubricating oil composition of one embodiment of the present invention may further contain an extreme pressure agent.
  • the extreme pressure agent may be used alone or in combination of two or more.
  • Examples of the extreme pressure agent used in one embodiment of the present invention include sulfur-based compounds such as sulfurized olefins, dialkyl polysulfides, diarylalkyl polysulfides, and diaryl polysulfides, phosphoric acid esters, thiophosphoric acid esters, phosphorous esters, and alkyl hydrogen phosphites. , phosphoric acid ester amine salts, phosphorous acid ester amine salts, and the like.
  • the lubricating oil composition of one embodiment of the present invention may further contain a metal deactivator.
  • the metal deactivators may be used alone or in combination of two or more. Examples of the metal deactivator used in one embodiment of the present invention include benzotriazole, triazole derivatives, benzotriazole derivatives, thiadiazole derivatives, and the like.
  • the lubricating oil composition of one embodiment of the present invention may further contain an oily agent.
  • the oily agents may be used alone or in combination of two or more.
  • Examples of the oily agent used in one embodiment of the present invention include aliphatic saturated and unsaturated monocarboxylic acids such as stearic acid and oleic acid, polymerized fatty acids such as dimer acid and hydrogenated dimer acid, ricinoleic acid, and 12-hydroxystearin.
  • Hydroxy fatty acids such as acids; aliphatic saturated and unsaturated monoalcohols such as lauryl alcohol and oleyl alcohol; aliphatic saturated and unsaturated monoamines such as stearylamine and oleylamine; aliphatic saturated and unsaturated monoamines such as lauric acid amide and oleic acid amide.
  • Examples include saturated monocarboxylic acid amides.
  • the lubricating oil composition of one embodiment of the present invention may further contain a rust inhibitor.
  • the rust inhibitors may be used alone or in combination of two or more.
  • Examples of the rust preventive agent used in one embodiment of the present invention include fatty acids, alkenyl succinic acid half esters, fatty acid soaps, alkyl sulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, oxidized paraffins, alkyl polyoxyethylene ethers, and the like. Can be mentioned.
  • the lubricating oil composition of one embodiment of the present invention may further contain an antifoaming agent.
  • Antifoaming agents may be used alone or in combination of two or more. Examples of the antifoaming agent used in one embodiment of the present invention include alkyl silicone antifoaming agents, fluorosilicone antifoaming agents, fluoroalkyl ether antifoaming agents, and the like.
  • the method for producing the lubricating oil composition of one embodiment of the present invention is not particularly limited, but from the viewpoint of productivity, the base oil (A) may be added to the above-mentioned components (B) and (C) as necessary.
  • the method includes a step of blending components (D) to (G) and other lubricating oil additives.
  • the kinematic viscosity at 40°C of the lubricating oil composition of one embodiment of the present invention is preferably 10 to 120 mm 2 /s, more preferably 15 to 100 mm 2 /s, even more preferably 20 to 80 mm 2 /s, even more preferably is 25 to 70 mm 2 /s, particularly preferably 27 to 60 mm 2 /s.
  • the kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 2.5 to 20.0 mm 2 /s, more preferably 4.0 to 18.0 mm 2 /s, and still more preferably 5.0 mm 2 /s. 0 to 15.0 mm 2 /s, more preferably 6.0 to 12.0 mm 2 /s, particularly preferably 7.0 to 10.0 mm 2 /s.
  • the viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 80 or more, more preferably 100 or more, more preferably 120 or more, even more preferably 150 or more, even more preferably 170 or more, and particularly preferably 200 or more. It is.
  • the content of calcium atoms is preferably 50 mass ppm or more, more preferably 100 mass ppm or more, and more preferably 50 mass ppm or more, based on the total amount (100 mass %) of the lubricating oil composition.
  • the content of zinc atoms is preferably 50 mass ppm or more, more preferably 100 mass ppm or more, and further Preferably 300 mass ppm or more, even more preferably 500 mass ppm or more, particularly preferably 700 mass ppm or more, and preferably 7000 mass ppm or less, more preferably 5000 mass ppm or less, still more preferably 3000 mass ppm or less. , even more preferably 2000 mass ppm or less, particularly preferably 1500 mass ppm or less.
  • the content of molybdenum atoms is preferably 100 mass ppm or more, more preferably 200 mass ppm or more, and further Preferably 300 mass ppm or more, even more preferably 400 mass ppm or more, particularly preferably 500 mass ppm or more, and preferably 7000 mass ppm or less, more preferably 5000 mass ppm or less, still more preferably 3000 mass ppm or less. , more preferably 2000 mass ppm or less, particularly preferably 1000 mass ppm or less.
  • the content of phosphorus atoms is preferably 50 mass ppm or more, more preferably 100 mass ppm or more, and further Preferably 200 mass ppm or more, even more preferably 300 mass ppm or more, particularly preferably 400 mass ppm or more, and preferably 1000 mass ppm or less, more preferably 950 mass ppm or less, still more preferably 900 mass ppm or less. , even more preferably 850 mass ppm or less, particularly preferably 750 mass ppm or less.
  • the content of boron atoms is preferably 10 mass ppm or more, more preferably 50 mass ppm or more, and further Preferably 100 mass ppm or more, even more preferably 150 mass ppm or more, particularly preferably 200 mass ppm or more, and preferably 1000 mass ppm or less, more preferably 900 mass ppm or less, still more preferably 800 mass ppm or less. , more preferably 700 mass ppm or less, particularly preferably 600 mass ppm or less.
  • the nitrogen atom content is preferably 100 mass ppm or more, more preferably 500 mass ppm or more, and further Preferably 1000 mass ppm or more, even more preferably 1500 mass ppm or more, particularly preferably 1800 mass ppm or more, and preferably 8000 mass ppm or less, more preferably 6000 mass ppm or less, still more preferably 5000 mass ppm or less. , more preferably 4000 mass ppm or less, particularly preferably 3000 mass ppm or less.
  • the amount of copper eluted is preferably less than 250 mass ppm, more preferably 220 mass ppm, when the lubricating oil composition of one embodiment of the present invention is subjected to a copper leaching resistance test described in the Examples below.
  • ppm by weight more preferably less than 200 ppm by weight, even more preferably less than 185 ppm by weight, even more preferably less than 170 ppm by weight, even more preferably less than 120 ppm by weight, particularly preferably less than 100 ppm by weight.
  • the lubricating oil composition of one embodiment of the present invention is subjected to the hot tube test described in the Examples below, and the merit score is preferably 7.0 or higher, more preferably 7. .5 or more, more preferably 8.0 or more, even more preferably 8.5 or more, particularly preferably 9.0 or more.
  • the lubricating oil composition of one embodiment of the present invention has excellent copper elution resistance and can maintain good long drain properties over a long period of time. Therefore, the lubricating oil composition of one embodiment of the present invention can be applied to various devices that can exhibit the above characteristics, and can be suitably used for lubrication between various parts in an internal combustion engine, and in particular, can be applied to various devices that can exhibit the above characteristics. It can be suitably used for lubrication between various parts in an internal combustion engine of a hybrid system having an electric motor as a power source.
  • the present invention can also provide the following [I] and [II].
  • the hybrid system described in [I] and [II] above is a mechanism having an internal combustion engine and an electric motor as power sources.
  • Examples of the hybrid system described in [I] and [II] above include a hybrid automobile, a hybrid two-wheeled vehicle, a hybrid railway, a hybrid ship, and the like.
  • the internal combustion engine of [I] above is filled with the lubricating oil composition of one embodiment of the present invention described above, and is a device that is installed in a hybrid system together with an electric motor.
  • the method for lubricating an internal combustion engine in [II] above specifies that the lubricating oil composition of one embodiment of the present invention described above is applied to an internal combustion engine installed in a hybrid system. The composition may also be applied to electric motors.
  • a lubricating oil composition containing a base oil (A), a hindered amine compound (B), and an organic zinc dithiophosphate (C) having at least one primary alkyl group.
  • component (C) contains a compound (C1) represented by the following general formula (c-1).
  • R c1 to R c4 are each independently a primary alkyl group.
  • the content of component (C) is 0.01 to 7.0% by mass based on the total amount of the lubricating oil composition, according to any one of [1] to [3] above.
  • the content of component (B) is 0.60 to 10.0% by mass based on the total amount of the lubricating oil composition, according to any one of [1] to [4] above.
  • the lubricating oil composition according to any one of the above.
  • Component (B) contains one or more selected from the compound (B1) represented by the following general formula (b-1) and the compound (B2) represented by the following general formula (b-2) , the lubricating oil composition according to any one of [1] to [6] above.
  • R b1 is each independently a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.
  • R b2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 18 ring carbon atoms, an aryl group having 6 to 18 ring carbon atoms, a hydroxyl group, an amino group, or -O-CO- A group represented by R b3 (R b3 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms).
  • Z is an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group having 3 to 18 ring carbon atoms, an arylene group having 6 to 18 ring carbon atoms, an oxygen atom, a sulfur atom, or -O-CO-(CH 2 ) n is a group represented by -CO-O- (n is an integer from 1 to 20).
  • D molybdenum dithiocarbamate
  • antioxidant (E) that does not fall under component (B)
  • component (E) contains one or more selected from amine antioxidants (E1) and phenolic antioxidants (E2), which do not fall under component (B).
  • component (F) contains one or more selected from non-boron modified alkenyl succinimide (F1) and boron modified alkenyl succinimide (F2). oil composition.
  • Component (F) contains component (F1) and component (F2), The lubricating oil composition according to [10] above, wherein the content ratio [(F1)/(F2)] of component (F1) and component (F2) is less than 5.00 in mass ratio.
  • the lubricating oil composition according to any one of [1] to [11] above which is used for lubricating an internal combustion engine of a hybrid system.
  • An internal combustion engine installed in a hybrid system filled with the lubricating oil composition according to any one of [1] to [12] above.
  • a method for lubricating an internal combustion engine in which the lubricating oil composition according to any one of [1] to [12] above is applied to an internal combustion engine installed in a hybrid system.
  • Copper elution resistance test Add 100 mL of the prepared lubricating oil composition as a test oil to a glass test tube (diameter 40 mm x length 300 mm), and then add a polished copper plate (25 mm x 25 mm x 1 mm). , immersed in test oil. After leaving the copper plate immersed in the test oil at an oil temperature of 140°C for 62 hours while blowing 2000 volume ppm of NOx gas into the total amount of supplied gas at a flow rate of 12 L/h, the JPI-5S was tested. -38-2003, the amount of copper eluted in the test oil (unit: mass ppm) was measured.
  • ⁇ Test container internal volume 500mL ⁇ Amount of lubricating oil composition used: 300mL ⁇ NOx gas amount: 2,000 volume ppm based on the total amount of gas supplied - Amount of pure water added: 5% by volume added to the total amount of lubricating oil composition every 24 hours - Stirring speed: 800 r/min ⁇ Test temperature (cycle): (1) 60°C for 4 hours, (2) 95°C for 2 hours, (3) 120°C for 12 hours, and (4) 60°C for 6 hours (1) to (4) ) as one cycle, and the cycle was repeated.
  • a hot tube test in accordance with JPI-5S-55-99 was conducted at a test temperature of 240° C. using the deteriorated oil prepared as described above.
  • the degree of discoloration of the glass tube after the test was evaluated on a 21-point scale ranging from 0 (black) to 10 (colorless) (merit score) in 0.5 increments. It can be said that the higher the rating, the more excellent the lubricating oil composition is in high-temperature cleanliness. In this example, when the rating was 7.0 or higher, it was determined that the lubricating oil composition had good high-temperature detergency.
  • the lubricating oil compositions prepared in Examples 1 to 7 contain components (A) to (C), so they have excellent copper elution resistance and maintain good long-drain properties for a long period of time. It is thought that it can be maintained for a long time. Furthermore, the lubricating oil compositions prepared in Examples 1 to 7 also showed excellent high-temperature cleanability. On the other hand, the lubricating oil compositions prepared in Comparative Examples 1 and 2 contain secondary zinc dialkyldithiophosphate instead of primary zinc dialkyldithiophosphate, but the amount of copper eluted exceeds 250 mass ppm. This resulted in a problem with copper elution resistance.

Abstract

L'invention concerne une composition lubrifiante comprenant une huile de base (A), un composé amine encombrée (B) et un dithiophosphate de zinc organique (C) ayant au moins un groupe alkyle primaire.
PCT/JP2023/010506 2022-03-31 2023-03-17 Composition lubrifiante WO2023189697A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP2004051758A (ja) * 2002-07-19 2004-02-19 Asahi Denka Kogyo Kk 硫黄含量の高い鉱油を基油とする潤滑油組成物
JP2009149892A (ja) * 2007-12-20 2009-07-09 Chevron Oronite Co Llc テトラアルキル−ナフタレン−1,8−ジアミン酸化防止剤を含む潤滑油組成物
JP2016501282A (ja) * 2012-11-16 2016-01-18 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se エポキシ化合物含有潤滑油組成物
JP2016180069A (ja) * 2015-03-24 2016-10-13 出光興産株式会社 ハイブリッド自動車の内燃機関用潤滑油組成物
JP2019089938A (ja) * 2017-11-14 2019-06-13 出光興産株式会社 潤滑油組成物
WO2020085228A1 (fr) * 2018-10-22 2020-04-30 出光興産株式会社 Composition lubrifiante et son procédé de production
JP2021054878A (ja) * 2019-09-26 2021-04-08 Eneos株式会社 内燃機関用潤滑油組成物

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004051758A (ja) * 2002-07-19 2004-02-19 Asahi Denka Kogyo Kk 硫黄含量の高い鉱油を基油とする潤滑油組成物
JP2009149892A (ja) * 2007-12-20 2009-07-09 Chevron Oronite Co Llc テトラアルキル−ナフタレン−1,8−ジアミン酸化防止剤を含む潤滑油組成物
JP2016501282A (ja) * 2012-11-16 2016-01-18 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se エポキシ化合物含有潤滑油組成物
JP2016501284A (ja) * 2012-11-16 2016-01-18 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se フルオロポリマーシール適合性向上のためのエポキシ化合物含有潤滑油組成物
JP2016501283A (ja) * 2012-11-16 2016-01-18 ビーエーエスエフ ソシエタス・ヨーロピアBasf Se フルオロポリマーシール適合性向上のためのエポキシ化合物含有潤滑油組成物
JP2016180069A (ja) * 2015-03-24 2016-10-13 出光興産株式会社 ハイブリッド自動車の内燃機関用潤滑油組成物
JP2019089938A (ja) * 2017-11-14 2019-06-13 出光興産株式会社 潤滑油組成物
WO2020085228A1 (fr) * 2018-10-22 2020-04-30 出光興産株式会社 Composition lubrifiante et son procédé de production
JP2021054878A (ja) * 2019-09-26 2021-04-08 Eneos株式会社 内燃機関用潤滑油組成物

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