WO2023162819A1 - Lubricating oil composition for two-wheeled motor vehicles - Google Patents

Lubricating oil composition for two-wheeled motor vehicles Download PDF

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Publication number
WO2023162819A1
WO2023162819A1 PCT/JP2023/005249 JP2023005249W WO2023162819A1 WO 2023162819 A1 WO2023162819 A1 WO 2023162819A1 JP 2023005249 W JP2023005249 W JP 2023005249W WO 2023162819 A1 WO2023162819 A1 WO 2023162819A1
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Prior art keywords
lubricating oil
oil composition
mass
friction
lubricating
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PCT/JP2023/005249
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French (fr)
Japanese (ja)
Inventor
貴登 原山
行敏 藤浪
元治 石川
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出光興産株式会社
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Publication of WO2023162819A1 publication Critical patent/WO2023162819A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • 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
    • C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
    • C10M159/12—Reaction products
    • C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
    • C10M159/22—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing phenol radicals
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives

Definitions

  • the present invention relates to a lubricating oil composition for two-wheeled vehicles.
  • lubricating oils for engines are required to have properties such as wear resistance, cleanliness, heat resistance, oxidation stability, low oil consumption, and low friction loss.
  • the user operates the clutch lever and shift pedal with his hands and feet while driving, and the shift drum, shift fork, shifter gear, and other parts inside the gearbox move to change gears. , the friction characteristics of these parts change depending on the lubricating oil used, and as a result, the feeling (shift feeling) that the user feels may differ.
  • Patent Document 1 discloses a lubricating oil composition containing an imide compound, a metallic detergent, and zinc dithiophosphate as a lubricating oil composition excellent in increasing the friction coefficient of a wet clutch as well as the performance required for an engine system. ing.
  • the lubricating oil composition described in Patent Document 1 has a high friction coefficient from the viewpoint of clutch friction characteristics, it is also necessary to achieve a low friction coefficient under specific conditions from the viewpoint of shift feeling.
  • the user when shifting up, the user first disengages the clutch via the clutch lever and then operates the shift pedal to rotate the shift drum inside the gearbox. The shifter gear moves through the fork and meshes with the dog teeth. Finally, the user releases the clutch lever and engages the clutch to complete the upshift.
  • the shift feeling is bad if they feel the rough feeling caused by the sliding of the parts inside the gearbox. It is said that the shift feeling is good when the feeling of sliding is obtained.
  • the present invention has been made in view of the above problems, and is a two-wheeled vehicle that satisfies the performance required as an engine lubricating oil, maintains a high friction coefficient in a wet clutch, and provides a good shift feeling.
  • the object is to provide a lubricating oil composition for
  • the present inventors have solved the above problems by providing a lubricating oil composition for two-wheeled vehicles containing a base oil and a metal phenate and having a coefficient of friction measured using an MTM tester within a specific range. I found that I could get it, and completed the present invention. That is, the present invention provides the following [1] to [3].
  • ⁇ Test piece disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material ⁇ Operating time: 2 hours ⁇ Load: 30N ⁇ Oil temperature: 80°C ⁇ Speed: 100mm/s ⁇ Slip ratio (SRR): 50% [2] A method of lubricating an engine and a transmission of a two-wheeled vehicle using the lubricating oil composition for a two-wheeled vehicle according to [1] above.
  • a lubricating oil composition for a two-wheeled vehicle that satisfies the performance required as an engine lubricating oil, maintains a high friction coefficient in a wet clutch, and provides good shift feeling. can.
  • the lower and upper limits described stepwise for preferable numerical ranges can be independently combined.
  • preferably 10 to 90, more preferably 30 to 60 combining “preferred lower limit (10)” and “more preferred upper limit (60)” to “10 to 60” can also
  • the numerical values “greater than”, “less than or equal to”, “less than”, and “greater than” regarding the description of numerical ranges are numerical values that can be arbitrarily combined.
  • the content of calcium atoms means the value measured according to JPI-5S-38-03.
  • the lubricating oil composition for a two-wheeled vehicle of the present embodiment contains a base oil (A) and a metal phenate (B), and has a friction coefficient of 0 as measured using an MTM tester under the following conditions. less than .0900.
  • ⁇ Test piece disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
  • ⁇ Operating time 2 hours
  • ⁇ Load 30N
  • ⁇ Oil temperature 80°C
  • Speed 100mm/s ⁇ Slip ratio (SRR): 50%
  • SRR 100mm/s ⁇ Slip ratio
  • the base oil (A) contained in the lubricating oil composition for two-wheeled vehicles of the present embodiment 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; distillates obtained by vacuum distillation of these atmospheric residual oils.
  • a mineral 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;
  • synthetic oils include poly- ⁇ such as ⁇ -olefin homopolymers and ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
  • - Olefins ⁇ -olefin homopolymers and ⁇ -olefin copolymers
  • isoparaffins various esters such as polyol esters and dibasic acid esters
  • various ethers such as polyphenyl ethers
  • polyalkylene glycols GTL base oil obtained by isomerizing (GasToLiquidsWAX)).
  • base oils classified into Groups 2 and 3 of the API (American Petroleum Institute) base oil category are preferable, and base oils classified into Group 3 are more preferable.
  • mineral oil may be used alone or in combination of multiple types, and synthetic oil may be used alone or in combination of multiple types. Furthermore, one or more mineral oils and one or more synthetic oils may be used in combination.
  • the kinematic viscosity and viscosity index of the base oil (A) are not particularly limited, but from the viewpoint of improving the wear resistance of the lubricating oil composition, the kinematic viscosity and viscosity index should be within the following ranges. is preferred.
  • the kinematic viscosity of the base oil (A) at 100° C. is preferably 4.0 mm 2 /s or more, more preferably 4.5 mm 2 /s or more, still more preferably 5.0 mm 2 /s or more. It is preferably 20.0 mm 2 /s or less, more preferably 15.0 mm 2 /s or less, still more preferably 11.0 mm 2 /s or less.
  • the viscosity index of the base oil (A) is preferably 80 or higher, more preferably 90 or higher, still more preferably 100 or higher, and even more preferably 105 or higher.
  • kinematic viscosity and viscosity index mean values measured or calculated according to JIS K 2283:2000.
  • the base oil (A) is a mixed base oil containing two or more base oils, the kinematic viscosity and viscosity index of the mixed base oil should be within the above ranges.
  • the content of the base oil (A) is not particularly limited, but from the viewpoint of improving the wear resistance, based on the total amount (100% by mass) of the lubricating oil composition , preferably 60 to 99% by mass, more preferably 70 to 98% by mass, still more preferably 80 to 97% by mass, particularly preferably 85 to 95% by mass.
  • the lubricating oil composition of the present embodiment can improve shift feeling.
  • the metal atom contained in the metal phenate (B) is preferably a metal atom selected from an alkali metal atom and an alkaline earth metal atom, and more preferably a sodium atom, a calcium atom, a magnesium atom and a barium atom, from the viewpoint of improving cleanliness.
  • a calcium atom and a magnesium atom are more preferred, and a calcium atom is even more preferred.
  • the metal phenate (B) is preferably calcium phenate.
  • the content of the calcium phenate in the metal phenate (B) is preferably 70 to 100% by mass, more preferably 80 to 100% by mass, more preferably 90 to 100% by mass, and even more preferably 95 to 100% by mass.
  • the metal phenate (B) used in this embodiment preferably contains a sulfur atom.
  • the content of sulfur atoms in the metal phenate (B) is preferably from 1.00 to 8.00% by mass, more preferably from 2.00 to 6.00% by mass, and still more preferably from 2.30 to 5.00 mass %, more preferably 2.50 to 4.00 mass %.
  • the content of sulfur atoms in the metal phenate (B) is within the above range, the number of polar groups in the molecular structure increases, making it easier to adsorb to the metal, and as a result, the friction coefficient measured using the MTM test decreases. presumed to decrease.
  • the metal phenate (B) may be a neutral salt, a basic salt, an overbased salt or a mixture thereof, with the overbased salt being particularly preferred.
  • the base number of the neutral salt is preferably 0 to 30 mgKOH/g, more preferably 0 to 25 mgKOH/g, still more preferably 0 to 20 mgKOH/g.
  • the base value of the basic salt or overbased salt is preferably 100 to 600 mgKOH/g, more preferably 120 to 550 mgKOH/g, More preferably 160 to 500 mgKOH/g, still more preferably 200 to 450 mgKOH/g.
  • the term “base number” refers to 7. of JIS K2501 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
  • the content of the metal phenate (B) in terms of metal atoms is not particularly limited. Based on the total amount, preferably 1100 to 4000 mass ppm, more preferably 1100 to 3000 mass ppm, still more preferably 1100 to 2000 mass ppm, still more preferably 1200 to 1500 mass ppm.
  • the content of the metal phenate (B) is preferably adjusted so that the content in terms of metal atoms falls within the above range.
  • the total amount (100% by mass) of the lubricating oil composition for motorcycles is preferably 1.10% by mass or more, more preferably 1.20% by mass or more, and still more preferably is 1.25% by mass or more, particularly preferably 1.30% by mass or more, preferably 2.00% by mass or less, more preferably 1.80% by mass or less, and still more preferably 1.70% by mass or less , more preferably 1.60% by mass or less, particularly preferably 1.50% by mass or less.
  • these upper and lower limits can be arbitrarily combined, specifically, preferably 1.10 to 2.00% by mass, more preferably 1.20 to 1.80% by mass. , more preferably 1.25 to 1.70% by mass, still more preferably 1.30 to 1.60% by mass, and particularly preferably 1.30 to 1.50% by mass.
  • the lubricating oil composition for two-wheeled vehicles of the present embodiment may further contain other metallic detergent (C).
  • the metal atoms contained in other metal-based detergents (C) are preferably metal atoms selected from alkali metal atoms and alkaline earth metal atoms from the viewpoint of improving cleanliness, such as sodium atoms, calcium atoms, magnesium atoms, A barium atom is more preferred, a calcium atom and a magnesium atom are more preferred, and a calcium atom is even more preferred.
  • other metallic detergents (C) metal sulfonates or metal salicylates are preferable, and metal sulfonates are more preferable. That is, the other metallic detergent (C) is preferably calcium sulfonate.
  • the content of calcium sulfonate in the other metallic detergent (C) is preferably 70- 100 mass %, more preferably 80 to 100 mass %, still more preferably 90 to 100 mass %, still more preferably 95 to 100 mass %.
  • Other metallic detergents (C) may be neutral salts, basic salts, overbased salts or mixtures thereof.
  • the base number of the neutral salt is preferably 0 to 30 mgKOH/g, more preferably 0 to 25 mgKOH/g, still more preferably 0 to 20 mgKOH. /g.
  • the base number of the basic salt or overbased salt is preferably 100 to 600 mgKOH/g, more preferably 120 to 550 mgKOH/g, more preferably 160-500 mgKOH/g, and even more preferably 200-450 mgKOH/g.
  • the term “base number” refers to 7. of JIS K2501 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
  • the content of the other metallic detergent (C) in terms of metal atoms is not particularly limited. Based on the total amount of the oil composition, it is preferably 200 to 8000 mass ppm, more preferably 400 to 5000 mass ppm, still more preferably 600 to 3500 mass ppm, still more preferably 700 to 2500 mass ppm.
  • the content of the other metallic detergent (C) is preferably adjusted so that the content in terms of metal atoms falls within the above range.
  • the total amount (100% by mass) of the lubricating oil composition for two-wheeled vehicles is preferably 0.10% by mass or more, more preferably 0.30% by mass.
  • these upper and lower limits can be arbitrarily combined, specifically, preferably 0.10 to 3.00% by mass, more preferably 0.30 to 2.50% by mass. , more preferably 0.50 to 2.00% by mass, still more preferably 0.60 to 1.40% by mass, and particularly preferably 0.60 to 1.00% by mass.
  • Viscosity index improvers (D) include, for example, non-dispersed poly(meth)acrylates, dispersed poly(meth)acrylates, star-shaped polymers, comb-shaped polymers, olefinic copolymers (e.g., ethylene-propylene copolymers etc.), dispersed olefin copolymers, styrene copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.).
  • non-dispersed poly(meth)acrylates, dispersed poly(meth)acrylates or star polymers are preferred, star polymers being most preferred. These may be used individually by 1 type, and may be used in combination of 2 or more type.
  • the weight average molecular weight (Mw) of the viscosity index improver (D) is preferably 10,000 to 1,500,000, preferably 200,000 to 1,200,000, more preferably 300,000 to 1,000,000. 000,000, but is appropriately set according to the type of polymer. Further, the molecular weight distribution (Mw/Mn) of the viscosity index improver (D) is preferably 8.0 or less, more preferably 5.0 or less, still more preferably 3.0 or less, and even more preferably 1.9. or less, and usually 1.01 or more. In the present specification, the weight average molecular weight (Mw) and number average molecular weight (Mn) of each component are values measured by gel permeation chromatography (GPC) and converted to standard polystyrene.
  • GPC gel permeation chromatography
  • the star polymer may be any polymer having a structure in which three or more chain polymers are bonded at one point.
  • Examples of the chain polymer constituting the star polymer include copolymers of vinyl aromatic monomers and conjugated diene monomers, hydrides thereof, and the like.
  • Examples of the vinyl aromatic monomer include styrene, alkyl-substituted styrene having 8 to 16 carbon atoms, alkoxy-substituted styrene having 8 to 16 carbon atoms, vinylnaphthalene, and alkyl-substituted vinylnaphthalene having 8 to 16 carbon atoms.
  • Conjugated diene monomers include conjugated dienes having 4 to 12 carbon atoms, specifically 1,3-butadiene, isoprene, piperylene, 4-methylpenta-1,3-diene, 3,4-dimethyl-1 ,3-hexadiene, 4,5-diethyl-1,3-octadiene and the like.
  • the content of the viscosity index improver (D) in terms of resin content is preferably 0.01 based on the total amount (100% by mass) of the lubricating oil composition. ⁇ 10 mass%, more preferably 0.05 to 5.0 mass%, still more preferably 0.10 to 2.0 mass%, still more preferably 0.20 to 1.0 mass%.
  • the lubricating oil composition for a two-wheeled vehicle of the present embodiment may contain lubricating oil additives other than the above components within a range that does not impair the effects of the present invention.
  • Other lubricating oil additives include, for example, antiwear agents, ashless dispersants, antioxidants, pour point depressants, metallic friction modifiers, rust inhibitors, metal deactivators, demulsifiers, An antifoaming agent and the like are included. Each of these lubricating oil additives may be used alone or in combination of two or more.
  • antiwear agents include zinc-containing compounds such as zinc dialkyldithiophosphate (ZnDTP) and zinc phosphate; disulfides, sulfurized olefins, sulfurized fats and oils, sulfurized esters, thiocarbonates, thiocarbamates, and polysulfides sulfur-containing compounds such as; phosphites, phosphates, phosphonates, and phosphorous-containing compounds such as amine salts or metal salts thereof; Examples include sulfur- and phosphorus-containing antiwear agents such as esters, amine salts or metal salts thereof. Among these, zinc dialkyldithiophosphate (ZnDTP) is preferred.
  • ZnDTP zinc dialkyldithiophosphate
  • ashless dispersants include succinic acid monoimides such as alkenyl succinic acid monoimides and alkyl succinic acid monoimides; boron-modified succinic acid monoimides; succinic acid bisimides such as alkenyl succinic acid bisimides and alkyl succinic acid bisimides; One or more compounds selected from the group consisting of boron-modified bisimides are included. Among these, one or more selected from the group consisting of succinic acid monoimide (non-boron-modified) and succinic acid bisimide (non-boron-modified) is preferable, and succinic acid bisimide (non-boron-modified) is more preferable.
  • antioxidants examples include amine-based antioxidants, phenol-based antioxidants, molybdenum-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants. Among these, one or more selected from amine-based antioxidants and phenol-based antioxidants are preferred.
  • pour point depressants examples include ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates, and polyalkylstyrenes.
  • metal-based friction modifiers include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid.
  • MoDTC molybdenum dithiocarbamate
  • MoDTP molybdenum dithiophosphate
  • amine salts of molybdic acid examples include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid.
  • rust preventives include fatty acids, alkenylsuccinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, and alkyl polyoxyethylene ethers.
  • metal deactivators examples include benzotriazole-based compounds, tolyltriazole-based compounds, thiadiazole-based compounds, imidazole-based compounds, and pyrimidine-based compounds.
  • demulsifiers include anionic surfactants such as castor oil sulfates and petroleum sulfonates; cationic surfactants such as quaternary ammonium salts and imidazolines; polyoxyalkylene polyglycols and their dicarboxylic acids. esters; alkylene oxide adducts of alkylphenol-formaldehyde polycondensates; and the like.
  • antifoaming agents examples include fluorine antifoaming agents such as silicone antifoaming agents, fluorosilicone oils, and fluoroalkyl ethers, and polyacrylate antifoaming agents.
  • the content of the other lubricating oil additives described above can be adjusted as appropriate within a range that does not impair the effects of the present invention. ), it is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 7% by mass, still more preferably 0.03 to 5% by mass.
  • the total content of component (A), component (B), component (C) and component (D) is the total amount of the lubricating oil composition (100% by mass) basis , preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, particularly preferably 95% by mass or more, and usually 100% by mass It is below.
  • the kinematic viscosity at 100° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 6.0 to 20.0 mm 2 /s, more preferably 7.0 to 18.0 mm 2 /s, still more preferably 8 .0 to 17.0 mm 2 /s.
  • the kinematic viscosity at 40° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 20.0 to 140.0 mm 2 /s, more preferably 40.0 to 100.0 mm 2 /s, and even more preferably is 50.0 to 95.0 mm 2 /s.
  • the viscosity index of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 100 or higher, more preferably 120 or higher, and even more preferably 130 or higher.
  • the coefficient of friction measured using an MTM tester under the conditions described in Examples below should be less than 0.0900, preferably less than 0.0900. 0880 or less, more preferably 0.0870 or less, and still more preferably 0.0860 or less.
  • the lower limit of the coefficient of friction is preferably 0.0600 or more, more preferably 0.0700 or more, still more preferably 0.0800 or more, in consideration of the balance with other properties.
  • the lubricating oil composition for a two-wheeled vehicle of the present embodiment preferably has a performance classification of MA2 as evaluated in accordance with the clutch friction characteristic test of JASO T903:2016.
  • the HTHS viscosity at 150° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 1.5 mPa ⁇ s or more, more preferably 1.7 mPa ⁇ s or more, and even more preferably 2.9 mPa. • s or more. Also, it is preferably less than 4.0 mPa ⁇ s, more preferably less than 3.9 mPa ⁇ s, still more preferably less than 3.5 mPa ⁇ s.
  • a shear rate of 10 6 /s can be measured at a shear rate of 10 6 /s using a TBS high temperature viscometer (Tapered Bearing Simulator Viscometer) according to ASTM D4683.
  • the lubricating oil composition of the present embodiment is provided for a two-wheeled vehicle in which the engine lubricating oil and the power transmission lubricating oil are lubricated with the same oil agent.
  • the present embodiment also provides a lubricating method for lubricating an engine and a transmission of a two-wheeled vehicle using the lubricating oil composition for a two-wheeled vehicle. Furthermore, the present embodiment is a method for producing a lubricating oil composition for a two-wheeled vehicle by mixing a base oil (A) and a metal phenate (B), wherein the lubricating oil composition for a two-wheeled vehicle is tested by an MTM tester. Also provided is a method for producing a lubricating oil composition for a two-wheeled vehicle having a coefficient of friction of less than 0.0900 as measured under the conditions described above.
  • lubricating oil composition for two-wheeled vehicles in the lubricating method or the method for producing a lubricating oil composition for two-wheeled vehicles, preferred aspects of each component, suitable properties of the lubricating oil composition for two-wheeled vehicles, etc. are as described above. is.
  • Examples 1-2, Comparative Examples 1-4 The following base oils and various additives were added in the compounding amounts shown in Table 1 and thoroughly mixed to prepare lubricating oil compositions. The details of the base oils and various additives used in Examples and Comparative Examples are as follows.
  • Component (B) - Overbased Ca phenate 1: calcium phenate, base number 251 mgKOH/g, content of calcium atoms 9.5% by mass, content of sulfur atoms 3.07% by mass.
  • Overbased Ca phenate 2 calcium phenate, base number 250 mgKOH/g, content of calcium atoms 9.25% by mass, content of sulfur atoms 3.46% by mass.
  • Component (C) - Overbased Ca sulfonate 1: calcium sulfonate, base number 251 mgKOH/g, content of calcium atoms 11.9% by mass.
  • Overbased Ca sulfonate 2 calcium sulfonate, base value 307 mgKOH/g, content of calcium atoms 11.6% by mass.
  • Overbased Ca salicylate calcium salicylate, base number 225 mgKOH/g, content of calcium atoms 8.0% by mass.
  • Viscosity index improver Infineum diblock star polymer, weight average molecular weight 780,000.
  • An additive package containing pour point depressants, antifoam agents, dispersants, antioxidants, antiwear agents (zinc dialkyldithiophosphates (ZnDTP)), and metallic detergents.
  • the lubricating oil compositions prepared in Examples 1 and 2 satisfied the high-temperature detergency required as an engine oil lubricating oil, and maintained a high friction coefficient in a wet clutch, while providing good shift feeling. .
  • the lubricating oil compositions prepared in Comparative Examples 1 to 4 had a high metal-to-metal friction coefficient measured using an MTM tester, and the shift feeling evaluated by subjects was insufficient.
  • the lubricating oil compositions prepared in Comparative Examples 1 and 2 had MA clutch friction characteristics.
  • the lubricating oil compositions prepared in Comparative Examples 1 and 4 scored less than 8.0 in the hot tube test, indicating poor high temperature detergency.

Abstract

Provided is a lubricating oil composition for two-wheeled motor vehicles which comprises a base oil (A) and a metal phenate (B) and has a coefficient of friction, as measured using an MTM testing machine under the conditions below, of less than 0.0900. The lubricating oil composition for two-wheeled motor vehicles satisfies the performance required of lubricating oils for engines, retains a high coefficient of friction in wet clutches, and imparts an excellent shift feel.　·Test pieces: disk of standard test piece (AISI 52100) and ball (3/4 inch) of same material ·Operation time: 10 minutes ·Load: 30 N ·Oil temperature: 80°C ·Speed: 100 mm/s ·Slide-to-roll ratio (SRR): 50%

Description

二輪自動車用潤滑油組成物Lubricating oil composition for motorcycle
　本発明は、二輪自動車用潤滑油組成物に関する。 The present invention relates to a lubricating oil composition for two-wheeled vehicles.
　二輪自動車等のエンジン用潤滑油と動力伝達用潤滑油とを同一の油剤で潤滑するシステムに対しては、エンジン用潤滑油として要求される性能に加え、動力伝達用潤滑油としての性能も具備する必要がある。
　具体的には、エンジン用潤滑油には、耐摩耗性、清浄性、耐熱性、酸化安定性、オイル消費が少ないこと、低摩擦損失等の各特性が要求されている。一方、マニュアルトランスミッションを搭載した二輪自動車は走行中にユーザーが手足によりクラッチレバーやシフトペダルを操作し、ギアボックス内部のシフトドラム、シフトフォーク、シフターギア等の部品が動くことでシフトチェンジを行うが、使用する潤滑油によってこれらの部品の摩擦特性が変わり、その結果ユーザーが感じる感覚（シフトフィーリング）が異なる事がある。 In addition to the performance required as an engine lubricant, it also has performance as a power transmission lubricant for a system that lubricates the engine lubricating oil and the power transmission lubricating oil with the same oil. There is a need to.
Specifically, lubricating oils for engines are required to have properties such as wear resistance, cleanliness, heat resistance, oxidation stability, low oil consumption, and low friction loss. On the other hand, in a motorcycle equipped with a manual transmission, the user operates the clutch lever and shift pedal with his hands and feet while driving, and the shift drum, shift fork, shifter gear, and other parts inside the gearbox move to change gears. , the friction characteristics of these parts change depending on the lubricating oil used, and as a result, the feeling (shift feeling) that the user feels may differ.
　特許文献１には、エンジンシステムに対する要求性能とともに、湿式クラッチに対する高摩擦係数化に優れた潤滑油組成物として、イミド化合物、金属系清浄剤及びジチオリン酸亜鉛を含有する潤滑油組成物が開示されている。 Patent Document 1 discloses a lubricating oil composition containing an imide compound, a metallic detergent, and zinc dithiophosphate as a lubricating oil composition excellent in increasing the friction coefficient of a wet clutch as well as the performance required for an engine system. ing.
特開２０１９－２０６６４４号公報JP 2019-206644 A
　しかしながら、特許文献１に記載の潤滑油組成物はクラッチ摩擦特性の観点から摩擦係数が高いものであるが、シフトフィーリングの観点では特定の条件における摩擦係数が低いことをも同時に実現する必要があり、さらなる改善が望まれている。
　ここで、例えばシフトアップする際には、まずユーザーはクラッチレバーを介してクラッチを切り、次いでシフトペダルを操作してギアボックス内部のシフトドラムを回転させるが、このシフトドラムの回転に伴い、シフトフォークを介してシフターギアが移動し、シフターギアとドッグ歯が噛み合う。そして、最後にユーザーがクラッチレバーを離してクラッチを締結させることでシフトアップが完了する。この一連の流れにおいてユーザーは、特にシフトペダルを操作する際に、ギアボックス内部の部品同士の摺動によるざらついた感覚を感じるとシフトフィーリングは悪いと感じ、そのような感覚が無く、スムーズに摺動する感覚を得るとシフトフィーリングは良好であると感じるものとされる。 However, although the lubricating oil composition described in Patent Document 1 has a high friction coefficient from the viewpoint of clutch friction characteristics, it is also necessary to achieve a low friction coefficient under specific conditions from the viewpoint of shift feeling. There is a need for further improvement.
Here, for example, when shifting up, the user first disengages the clutch via the clutch lever and then operates the shift pedal to rotate the shift drum inside the gearbox. The shifter gear moves through the fork and meshes with the dog teeth. Finally, the user releases the clutch lever and engages the clutch to complete the upshift. In this series of processes, especially when operating the shift pedal, the user feels that the shift feeling is bad if they feel the rough feeling caused by the sliding of the parts inside the gearbox. It is said that the shift feeling is good when the feeling of sliding is obtained.
　本発明は、上記問題点に鑑みてなされたものであって、エンジン用潤滑油として要求される性能を満たし、湿式クラッチにおける高い摩擦係数を維持しつつも、シフトフィーリングが良好となる二輪自動車用潤滑油組成物を提供することを目的とする。 The present invention has been made in view of the above problems, and is a two-wheeled vehicle that satisfies the performance required as an engine lubricating oil, maintains a high friction coefficient in a wet clutch, and provides a good shift feeling. The object is to provide a lubricating oil composition for
　本発明者らは、基油と金属フェネートとを含有し、かつ、ＭＴＭ試験機を用いて測定された摩擦係数が特定の範囲内にある二輪自動車用潤滑油組成物が、上記課題を解決し得ることを見出し、本発明を完成させた。
　すなわち本発明は、下記［１］～［３］を提供する。
［１］基油（Ａ）と、金属フェネート（Ｂ）とを含有し、かつ、ＭＴＭ試験機を用いて下記の条件にて測定された摩擦係数が０．０９００未満である二輪自動車用潤滑油組成物。
　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
　・運転時間：２時間
　・荷重：３０Ｎ
　・油温：８０℃
　・速度：１００ｍｍ／ｓ
　・すべり率（ＳＲＲ）：５０％
［２］前記［１］に記載の二輪自動車用潤滑油組成物を用いて二輪自動車のエンジン及び変速機を潤滑する潤滑方法。
［３］基油（Ａ）と、金属フェネート（Ｂ）とを混合する二輪自動車用潤滑油組成物の製造方法であって、前記二輪自動車用潤滑油組成物の、ＭＴＭ試験機を用いて下記の条件にて測定された摩擦係数が０．０９００未満である二輪自動車用潤滑油組成物の製造方法。
　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
　・運転時間：２時間
　・荷重：３０Ｎ
　・油温：８０℃
　・速度：１００ｍｍ／ｓ
　・すべり率（ＳＲＲ）：５０％ The present inventors have solved the above problems by providing a lubricating oil composition for two-wheeled vehicles containing a base oil and a metal phenate and having a coefficient of friction measured using an MTM tester within a specific range. I found that I could get it, and completed the present invention.
That is, the present invention provides the following [1] to [3].
[1] A lubricating oil for motorcycles containing a base oil (A) and a metal phenate (B) and having a coefficient of friction of less than 0.0900 as measured using an MTM tester under the following conditions: Composition.
・Test piece: disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
・Operating time: 2 hours ・Load: 30N
・Oil temperature: 80℃
・Speed: 100mm/s
・Slip ratio (SRR): 50%
[2] A method of lubricating an engine and a transmission of a two-wheeled vehicle using the lubricating oil composition for a two-wheeled vehicle according to [1] above.
[3] A method for producing a lubricating oil composition for motorcycles by mixing a base oil (A) and a metal phenate (B), wherein the following A method for producing a lubricating oil composition for a two-wheeled vehicle having a coefficient of friction of less than 0.0900 measured under the conditions of
・Test piece: Disc of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
・Operating time: 2 hours ・Load: 30N
・Oil temperature: 80℃
・Speed: 100mm/s
・Slip ratio (SRR): 50%
　本発明によると、エンジン用潤滑油として要求される性能を満たし、かつ、湿式クラッチにおける高い摩擦係数を維持しつつも、シフトフィーリングが良好となる二輪自動車用潤滑油組成物を提供することができる。 According to the present invention, it is possible to provide a lubricating oil composition for a two-wheeled vehicle that satisfies the performance required as an engine lubricating oil, maintains a high friction coefficient in a wet clutch, and provides good shift feeling. can.
　本明細書において、好ましい数値範囲（例えば、含有量等の範囲）について、段階的に記載された下限値及び上限値は、それぞれ独立して組み合わせることができる。例えば、「好ましくは１０～９０、より好ましくは３０～６０」という記載から、「好ましい下限値（１０）」と「より好ましい上限値（６０）」とを組み合わせて、「１０～６０」とすることもできる。同様に、本明細書中において、数値範囲の記載に関する「以上」、「以下」、「未満」、「超」の数値は任意に組み合わせできる数値である。 In this specification, the lower and upper limits described stepwise for preferable numerical ranges (for example, ranges of contents, etc.) can be independently combined. For example, from the statement "preferably 10 to 90, more preferably 30 to 60", combining "preferred lower limit (10)" and "more preferred upper limit (60)" to "10 to 60" can also Similarly, in this specification, the numerical values "greater than", "less than or equal to", "less than", and "greater than" regarding the description of numerical ranges are numerical values that can be arbitrarily combined.
　本明細書において、カルシウム原子の含有量は、ＪＰＩ－５Ｓ－３８－０３に準拠して測定された値を意味する。 As used herein, the content of calcium atoms means the value measured according to JPI-5S-38-03.
［二輪自動車用潤滑油組成物］
　本実施形態の二輪自動車用潤滑油組成物は、基油（Ａ）と、金属フェネート（Ｂ）とを含有し、かつ、ＭＴＭ試験機を用いて下記の条件にて測定された摩擦係数が０．０９００未満である。
　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
　・運転時間：２時間
　・荷重：３０Ｎ
　・油温：８０℃
　・速度：１００ｍｍ／ｓ
　・すべり率（ＳＲＲ）：５０％
　以下、本実施形態の二輪自動車用潤滑油組成物に含まれる各成分について説明する。 [Lubricating oil composition for motorcycle]
The lubricating oil composition for a two-wheeled vehicle of the present embodiment contains a base oil (A) and a metal phenate (B), and has a friction coefficient of 0 as measured using an MTM tester under the following conditions. less than .0900.
・Test piece: disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
・Operating time: 2 hours ・Load: 30N
・Oil temperature: 80℃
・Speed: 100mm/s
・Slip ratio (SRR): 50%
Each component contained in the lubricating oil composition for a two-wheeled vehicle of the present embodiment will be described below.
＜基油（Ａ）＞
　本実施形態の二輪自動車用潤滑油組成物に含まれる基油（Ａ）としては、鉱油及び合成油から選ばれる１種以上を含有するものであればよい。 <Base oil (A)>
The base oil (A) contained in the lubricating oil composition for two-wheeled vehicles of the present embodiment may be one or more selected from mineral oils and synthetic oils.
　鉱油としては、例えば、パラフィン系原油、中間基系原油、ナフテン系原油等の原油を常圧蒸留して得られる常圧残油；これらの常圧残油を減圧蒸留して得られる留出油；当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、水素化精製等の精製処理を１つ以上施して得られる鉱油等が挙げられる。 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; distillates obtained by vacuum distillation of these atmospheric residual oils. a mineral 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;
　合成油としては、例えば、α－オレフィン単独重合体、α－オレフィン共重合体（例えば、エチレン－α－オレフィン共重合体等の炭素数８～１４のα－オレフィン共重合体）等のポリα－オレフィン；イソパラフィン；ポリオールエステル、二塩基酸エステル等の各種エステル；ポリフェニルエーテル等の各種エーテル；ポリアルキレングリコール；アルキルベンゼン；アルキルナフタレン；天然ガスからフィッシャー・トロプシュ法等により製造されるワックス（ＧＴＬワックス（GasToLiquidsWAX））を異性化することで得られるＧＴＬ基油等が挙げられる。 Examples of synthetic oils include poly-α such as α-olefin homopolymers and α-olefin copolymers (for example, α-olefin copolymers having 8 to 14 carbon atoms such as ethylene-α-olefin copolymers). - Olefins; isoparaffins; various esters such as polyol esters and dibasic acid esters; various ethers such as polyphenyl ethers; polyalkylene glycols; GTL base oil obtained by isomerizing (GasToLiquidsWAX)).
　本実施形態で用いる基油としては、ＡＰＩ（米国石油協会）の基油カテゴリーのグループ２及び３に分類される基油が好ましく、グループ３に分類される基油がより好ましい。 As the base oil used in the present embodiment, base oils classified into Groups 2 and 3 of the API (American Petroleum Institute) base oil category are preferable, and base oils classified into Group 3 are more preferable.
　基油（Ａ）は、鉱油を単独で又は複数種を組み合わせて用いてもよく、合成油を単独で又は複数種組み合わせて用いてもよい。さらには、１種以上の鉱油と１種以上の合成油とを組み合わせて用いてもよい。 For the base oil (A), mineral oil may be used alone or in combination of multiple types, and synthetic oil may be used alone or in combination of multiple types. Furthermore, one or more mineral oils and one or more synthetic oils may be used in combination.
　基油（Ａ）の動粘度及び粘度指数については特に制限はないが、潤滑油組成物の耐摩耗性をより良好なものとする観点から、動粘度及び粘度指数は、以下の範囲とすることが好ましい。
　基油（Ａ）の１００℃における動粘度としては、好ましくは４．０ｍｍ２／ｓ以上であり、より好ましくは４．５ｍｍ２／ｓ以上であり、更に好ましくは５．０ｍｍ２／ｓ以上であり、また、好ましくは２０．０ｍｍ２／ｓ以下であり、より好ましくは１５．０ｍｍ２／ｓ以下であり、更に好ましくは１１．０ｍｍ２／ｓ以下である。また、これらの上限値と下限値とは任意に組み合わせることができ、具体的には、好ましくは４．０～２０．０ｍｍ２／ｓ、より好ましくは４．５～１５．０ｍｍ２／ｓ、更に好ましくは５．０～１１．０ｍｍ２／ｓである。
　基油（Ａ）の粘度指数としては、好ましくは８０以上、より好ましくは９０以上、更に好ましくは１００以上、より更に好ましくは１０５以上である。
　なお、本明細書において、動粘度及び粘度指数は、ＪＩＳ　Ｋ　２２８３：２０００に準拠して測定又は算出された値を意味する。
　また、基油（Ａ）が、２種以上の基油を含有する混合基油である場合、当該混合基油の動粘度及び粘度指数が上記範囲内であればよい。 The kinematic viscosity and viscosity index of the base oil (A) are not particularly limited, but from the viewpoint of improving the wear resistance of the lubricating oil composition, the kinematic viscosity and viscosity index should be within the following ranges. is preferred.
The kinematic viscosity of the base oil (A) at 100° C. is preferably 4.0 mm 2 /s or more, more preferably 4.5 mm 2 /s or more, still more preferably 5.0 mm 2 /s or more. It is preferably 20.0 mm 2 /s or less, more preferably 15.0 mm 2 /s or less, still more preferably 11.0 mm 2 /s or less. In addition, these upper and lower limits can be arbitrarily combined. More preferably, it is 5.0 to 11.0 mm 2 /s.
The viscosity index of the base oil (A) is preferably 80 or higher, more preferably 90 or higher, still more preferably 100 or higher, and even more preferably 105 or higher.
In this specification, kinematic viscosity and viscosity index mean values measured or calculated according to JIS K 2283:2000.
Moreover, when the base oil (A) is a mixed base oil containing two or more base oils, the kinematic viscosity and viscosity index of the mixed base oil should be within the above ranges.
　本実施形態の潤滑油組成物において、基油（Ａ）の含有量は特に限定されないが、耐摩耗性をより良好なものとする観点から、潤滑油組成物の全量（１００質量％）基準で、好ましくは６０～９９質量％、より好ましくは７０～９８質量％、更に好ましくは８０～９７質量％、特に好ましくは８５～９５質量％である。 In the lubricating oil composition of the present embodiment, the content of the base oil (A) is not particularly limited, but from the viewpoint of improving the wear resistance, based on the total amount (100% by mass) of the lubricating oil composition , preferably 60 to 99% by mass, more preferably 70 to 98% by mass, still more preferably 80 to 97% by mass, particularly preferably 85 to 95% by mass.
＜金属フェネート（Ｂ）＞
　本実施形態の潤滑油組成物は、金属フェネート（Ｂ）を含有することで、シフトフィーリングを良好とすることができる。 <Metal phenate (B)>
By containing the metal phenate (B), the lubricating oil composition of the present embodiment can improve shift feeling.
　金属フェネート（Ｂ）に含まれる金属原子としては、清浄性向上の観点から、アルカリ金属原子及びアルカリ土類金属原子から選ばれる金属原子が好ましく、ナトリウム原子、カルシウム原子、マグネシウム原子、バリウム原子がより好ましく、カルシウム原子、マグネシウム原子が更に好ましく、カルシウム原子がより更に好ましい。つまり、金属フェネート（Ｂ）は、カルシウムフェネートであることが好ましい。
　金属フェネート（Ｂ）中のカルシウムフェネートの含有量は、潤滑油組成物中に含まれる金属フェネート（Ｂ）の全量（１００質量％）に対して、好ましくは７０～１００質量％、より好ましくは８０～１００質量％、更に好ましくは９０～１００質量％、より更に好ましくは９５～１００質量％である。 The metal atom contained in the metal phenate (B) is preferably a metal atom selected from an alkali metal atom and an alkaline earth metal atom, and more preferably a sodium atom, a calcium atom, a magnesium atom and a barium atom, from the viewpoint of improving cleanliness. A calcium atom and a magnesium atom are more preferred, and a calcium atom is even more preferred. That is, the metal phenate (B) is preferably calcium phenate.
The content of the calcium phenate in the metal phenate (B) is preferably 70 to 100% by mass, more preferably 80 to 100% by mass, more preferably 90 to 100% by mass, and even more preferably 95 to 100% by mass.
　本実施態様において用いる金属フェネート（Ｂ）は、硫黄原子を含有するものが好ましい。金属フェネート（Ｂ）中における硫黄原子の含有量は、好ましくは１．００～８．００質量％であり、より好ましくは２．００～６．００質量％であり、さらに好ましくは２．３０～５．００質量％、よりさらに好ましくは、２．５０～４．００質量%である。金属フェネート（Ｂ）における硫黄原子の含有量が上記範囲内であると、分子構造中に極性基が多くなり、金属への吸着がしやすくなり、そのためＭＴＭ試験を用いて測定される摩擦係数が低下するものと推察される。 The metal phenate (B) used in this embodiment preferably contains a sulfur atom. The content of sulfur atoms in the metal phenate (B) is preferably from 1.00 to 8.00% by mass, more preferably from 2.00 to 6.00% by mass, and still more preferably from 2.30 to 5.00 mass %, more preferably 2.50 to 4.00 mass %. When the content of sulfur atoms in the metal phenate (B) is within the above range, the number of polar groups in the molecular structure increases, making it easier to adsorb to the metal, and as a result, the friction coefficient measured using the MTM test decreases. presumed to decrease.
　金属フェネート（Ｂ）は、中性塩、塩基性塩、過塩基性塩又はこれらの混合物のいずれであってもよく、過塩基性塩が特に好ましい。
　金属フェネート（Ｂ）が中性塩である場合、当該中性塩の塩基価としては、好ましくは０～３０ｍｇＫＯＨ／ｇ、より好ましくは０～２５ｍｇＫＯＨ／ｇ、更に好ましくは０～２０ｍｇＫＯＨ／ｇである。
　金属フェネート（Ｂ）が塩基性塩又は過塩基性塩である場合、当該塩基性塩又は過塩基性塩の塩基価としては、好ましくは１００～６００ｍｇＫＯＨ／ｇ、より好ましくは１２０～５５０ｍｇＫＯＨ／ｇ、更に好ましくは１６０～５００ｍｇＫＯＨ／ｇ、より更に好ましくは２００～４５０ｍｇＫＯＨ／ｇである。
　なお、本明細書において、「塩基価」とは、ＪＩＳ　Ｋ２５０１「石油製品および潤滑油－中和価試験方法」の７．に準拠して測定される過塩素酸法による塩基価を意味する。 The metal phenate (B) may be a neutral salt, a basic salt, an overbased salt or a mixture thereof, with the overbased salt being particularly preferred.
When the metal phenate (B) is a neutral salt, the base number of the neutral salt is preferably 0 to 30 mgKOH/g, more preferably 0 to 25 mgKOH/g, still more preferably 0 to 20 mgKOH/g. .
When the metal phenate (B) is a basic salt or overbased salt, the base value of the basic salt or overbased salt is preferably 100 to 600 mgKOH/g, more preferably 120 to 550 mgKOH/g, More preferably 160 to 500 mgKOH/g, still more preferably 200 to 450 mgKOH/g.
As used herein, the term “base number” refers to 7. of JIS K2501 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
　本実施形態の二輪自動車用潤滑油組成物において、金属フェネート（Ｂ）の金属原子換算での含有量は特に限定されないが、シフトフィーリングをより良好なものとする観点から、潤滑油組成物の全量基準で、好ましくは１１００～４０００質量ｐｐｍ、より好ましくは１１００～３０００質量ｐｐｍ、更に好ましくは１１００～２０００質量ｐｐｍ、より更に好ましくは１２００～１５００質量ｐｐｍである。 In the lubricating oil composition for a two-wheeled vehicle of the present embodiment, the content of the metal phenate (B) in terms of metal atoms is not particularly limited. Based on the total amount, preferably 1100 to 4000 mass ppm, more preferably 1100 to 3000 mass ppm, still more preferably 1100 to 2000 mass ppm, still more preferably 1200 to 1500 mass ppm.
　本実施形態の二輪自動車用潤滑油組成物において、金属フェネート（Ｂ）の含有量は、金属原子換算での含有量が上記範囲に属するように調整されることが好ましく、具体的には、シフトフィーリングをより良好なものとする観点から、二輪自動車用潤滑油組成物の全量（１００質量％）基準で、好ましくは１．１０質量％以上、より好ましくは１．２０質量％以上、更に好ましくは１．２５質量％以上、特に好ましくは１．３０質量％以上であり、また、好ましくは２．００質量％以下、より好ましくは１．８０質量％以下、更に好ましくは１．７０質量％以下、より更に好ましくは１．６０質量％以下、特に好ましくは１．５０質量％以下である。また、これらの上限値及び下限値は任意に組み合わせることができ、具体的には、好ましくは１．１０～２．００質量％であり、より好ましくは１．２０～１．８０質量％であり、更に好ましくは１．２５～１．７０質量％であり、より更に好ましくは１．３０～１．６０質量％であり、特に好ましくは１．３０～１．５０質量％である。 In the lubricating oil composition for a two-wheeled vehicle of the present embodiment, the content of the metal phenate (B) is preferably adjusted so that the content in terms of metal atoms falls within the above range. From the viewpoint of improving the feeling, the total amount (100% by mass) of the lubricating oil composition for motorcycles is preferably 1.10% by mass or more, more preferably 1.20% by mass or more, and still more preferably is 1.25% by mass or more, particularly preferably 1.30% by mass or more, preferably 2.00% by mass or less, more preferably 1.80% by mass or less, and still more preferably 1.70% by mass or less , more preferably 1.60% by mass or less, particularly preferably 1.50% by mass or less. In addition, these upper and lower limits can be arbitrarily combined, specifically, preferably 1.10 to 2.00% by mass, more preferably 1.20 to 1.80% by mass. , more preferably 1.25 to 1.70% by mass, still more preferably 1.30 to 1.60% by mass, and particularly preferably 1.30 to 1.50% by mass.
＜その他の金属系清浄剤（Ｃ）＞
　本実施形態の二輪自動車用潤滑油組成物は、さらにその他の金属系清浄剤（Ｃ）を含有してもよい。 <Other metallic detergents (C)>
The lubricating oil composition for two-wheeled vehicles of the present embodiment may further contain other metallic detergent (C).
　その他の金属系清浄剤（Ｃ）に含まれる金属原子としては、清浄性向上の観点から、アルカリ金属原子及びアルカリ土類金属原子から選ばれる金属原子が好ましく、ナトリウム原子、カルシウム原子、マグネシウム原子、バリウム原子がより好ましく、カルシウム原子、マグネシウム原子が更に好ましく、カルシウム原子がより更に好ましい。また、その他の金属系清浄剤（Ｃ）としては、金属スルホネート又は金属サリチレートが好ましく、金属スルホネートがより好ましい。つまり、その他の金属系清浄剤（Ｃ）は、カルシウムスルホネートであることが好ましい。
　その他の金属系清浄剤（Ｃ）中のカルシウムスルホネートの含有量は、潤滑油組成物中に含まれるその他の金属系清浄剤（Ｃ）の全量（１００質量％）に対して、好ましくは７０～１００質量％、より好ましくは８０～１００質量％、更に好ましくは９０～１００質量％、より更に好ましくは９５～１００質量％である。 The metal atoms contained in other metal-based detergents (C) are preferably metal atoms selected from alkali metal atoms and alkaline earth metal atoms from the viewpoint of improving cleanliness, such as sodium atoms, calcium atoms, magnesium atoms, A barium atom is more preferred, a calcium atom and a magnesium atom are more preferred, and a calcium atom is even more preferred. Moreover, as other metallic detergents (C), metal sulfonates or metal salicylates are preferable, and metal sulfonates are more preferable. That is, the other metallic detergent (C) is preferably calcium sulfonate.
The content of calcium sulfonate in the other metallic detergent (C) is preferably 70- 100 mass %, more preferably 80 to 100 mass %, still more preferably 90 to 100 mass %, still more preferably 95 to 100 mass %.
　その他の金属系清浄剤（Ｃ）は、中性塩、塩基性塩、過塩基性塩又はこれらの混合物のいずれであってもよい。
　その他の金属系清浄剤（Ｃ）が中性塩である場合、当該中性塩の塩基価としては、好ましくは０～３０ｍｇＫＯＨ／ｇ、より好ましくは０～２５ｍｇＫＯＨ／ｇ、更に好ましくは０～２０ｍｇＫＯＨ／ｇである。
　その他の金属系清浄剤（Ｃ）が塩基性塩又は過塩基性塩である場合、当該塩基性塩又は過塩基性塩の塩基価としては、好ましくは１００～６００ｍｇＫＯＨ／ｇ、より好ましくは１２０～５５０ｍｇＫＯＨ／ｇ、更に好ましくは１６０～５００ｍｇＫＯＨ／ｇ、より更に好ましくは２００～４５０ｍｇＫＯＨ／ｇである。
　なお、本明細書において、「塩基価」とは、ＪＩＳ　Ｋ２５０１「石油製品および潤滑油－中和価試験方法」の７．に準拠して測定される過塩素酸法による塩基価を意味する。 Other metallic detergents (C) may be neutral salts, basic salts, overbased salts or mixtures thereof.
When the other metallic detergent (C) is a neutral salt, the base number of the neutral salt is preferably 0 to 30 mgKOH/g, more preferably 0 to 25 mgKOH/g, still more preferably 0 to 20 mgKOH. /g.
When the other metallic detergent (C) is a basic salt or overbased salt, the base number of the basic salt or overbased salt is preferably 100 to 600 mgKOH/g, more preferably 120 to 550 mgKOH/g, more preferably 160-500 mgKOH/g, and even more preferably 200-450 mgKOH/g.
As used herein, the term “base number” refers to 7. of JIS K2501 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
　本実施形態の二輪自動車用潤滑油組成物において、その他の金属系清浄剤（Ｃ）の金属原子換算での含有量は特に限定されないが、高温清浄性をより良好なものとする観点から、潤滑油組成物の全量基準で、好ましくは２００～８０００質量ｐｐｍ、より好ましくは４００～５０００質量ｐｐｍ、更に好ましくは６００～３５００質量ｐｐｍ、より更に好ましくは７００～２５００質量ｐｐｍである。 In the lubricating oil composition for motorcycles of the present embodiment, the content of the other metallic detergent (C) in terms of metal atoms is not particularly limited. Based on the total amount of the oil composition, it is preferably 200 to 8000 mass ppm, more preferably 400 to 5000 mass ppm, still more preferably 600 to 3500 mass ppm, still more preferably 700 to 2500 mass ppm.
　本実施形態の二輪自動車用潤滑油組成物において、その他の金属系清浄剤（Ｃ）の含有量は、金属原子換算での含有量が上記範囲に属するように調整されることが好ましく、具体的には、シフトフィーリングをより良好なものとする観点から、二輪自動車用潤滑油組成物の全量（１００質量％）基準で、好ましくは０．１０質量％以上、より好ましくは０．３０質量％以上、更に好ましくは０．５０質量％以上、特に好ましくは０．６０質量％以上であり、また、好ましくは３．００質量％以下、より好ましくは２．５０質量％以下、更に好ましくは２．００質量％以下、より更に好ましくは１．４０質量％以下、特に好ましくは１．００質量％以下である。また、これらの上限値及び下限値は任意に組み合わせることができ、具体的には、好ましくは０．１０～３．００質量％であり、より好ましくは０．３０～２．５０質量％であり、更に好ましくは０．５０～２．００質量％であり、より更に好ましく０．６０～１．４０質量％であり、特に好ましくは０．６０～１．００質量％である。 In the lubricating oil composition for motorcycles of the present embodiment, the content of the other metallic detergent (C) is preferably adjusted so that the content in terms of metal atoms falls within the above range. From the viewpoint of improving the shift feeling, the total amount (100% by mass) of the lubricating oil composition for two-wheeled vehicles is preferably 0.10% by mass or more, more preferably 0.30% by mass. Above, more preferably 0.50% by mass or more, particularly preferably 0.60% by mass or more, preferably 3.00% by mass or less, more preferably 2.50% by mass or less, still more preferably 2. 00% by mass or less, more preferably 1.40% by mass or less, and particularly preferably 1.00% by mass or less. In addition, these upper and lower limits can be arbitrarily combined, specifically, preferably 0.10 to 3.00% by mass, more preferably 0.30 to 2.50% by mass. , more preferably 0.50 to 2.00% by mass, still more preferably 0.60 to 1.40% by mass, and particularly preferably 0.60 to 1.00% by mass.
＜粘度指数向上剤（Ｄ）＞
　本実施形態の二輪自動車用潤滑油組成物は、さらに粘度指数向上剤（Ｄ）を含有していてもよい。
　粘度指数向上剤（Ｄ）としては、例えば、非分散型ポリ（メタ）アクリレート、分散型ポリ（メタ）アクリレート、星形ポリマー、櫛形ポリマー、オレフィン系共重合体（例えば、エチレン－プロピレン共重合体等）、分散型オレフィン系共重合体、スチレン系共重合体（例えば、スチレン－ジエン共重合体、スチレン－イソプレン共重合体等）等の重合体が挙げられる。これらの中でも、非分散型ポリ（メタ）アクリレート、分散型ポリ（メタ）アクリレート又は星形ポリマーが好ましく、星形ポリマーが最も好ましい。
　これらは、１種を単独で用いてもよく、二種以上を組み合わせて用いてもよい。 <Viscosity index improver (D)>
The lubricating oil composition for motorcycles of the present embodiment may further contain a viscosity index improver (D).
Viscosity index improvers (D) include, for example, non-dispersed poly(meth)acrylates, dispersed poly(meth)acrylates, star-shaped polymers, comb-shaped polymers, olefinic copolymers (e.g., ethylene-propylene copolymers etc.), dispersed olefin copolymers, styrene copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.). Among these, non-dispersed poly(meth)acrylates, dispersed poly(meth)acrylates or star polymers are preferred, star polymers being most preferred.
These may be used individually by 1 type, and may be used in combination of 2 or more type.
　粘度指数向上剤（Ｄ）の重量平均分子量（Ｍｗ）としては、好ましくは１０，０００～１，５００，０００、好ましくは２００，０００～１，２００，０００、より好ましくは３００，０００～１，０００，０００であるが、重合体の種類に応じて適宜設定される。
　また、粘度指数向上剤（Ｄ）の分子量分布（Ｍｗ／Ｍｎ）としては、好ましくは８．０以下、より好ましくは５．０以下、更に好ましくは３．０以下、より更に好ましくは１．９以下であり、また、通常１．０１以上である。
　尚、本明細書において、各成分の重量平均分子量（Ｍｗ）及び数平均分子量（Ｍｎ）とは、ゲルパーミエーションクロマトグラフィー（ＧＰＣ）法で測定される標準ポリスチレン換算の値である。 The weight average molecular weight (Mw) of the viscosity index improver (D) is preferably 10,000 to 1,500,000, preferably 200,000 to 1,200,000, more preferably 300,000 to 1,000,000. 000,000, but is appropriately set according to the type of polymer.
Further, the molecular weight distribution (Mw/Mn) of the viscosity index improver (D) is preferably 8.0 or less, more preferably 5.0 or less, still more preferably 3.0 or less, and even more preferably 1.9. or less, and usually 1.01 or more.
In the present specification, the weight average molecular weight (Mw) and number average molecular weight (Mn) of each component are values measured by gel permeation chromatography (GPC) and converted to standard polystyrene.
　上記星形ポリマーとしては、１点で３本以上の鎖状高分子が結合している構造を有する重合体であればよい。
　また、星形ポリマーを構成する鎖状高分子としては、例えば、ビニル芳香族モノマーと共役ジエンモノマーとの共重合体やその水素化物等が挙げられる。
　ビニル芳香族モノマーとしては、例えば、スチレン、炭素数８～１６のアルキル置換スチレン、炭素数８～１６のアルコキシ置換スチレン、ビニルナフタレン、炭素数８～１６のアルキル置換ビニルナフタレン等が挙げられる。
　共役ジエンモノマーとしては、炭素数４～１２の共役ジエンが挙げられ、具体的には、１，３－ブタジエン、イソプレン、ピペリレン、４－メチルペンタ－１，３－ジエン、３，４－ジメチル－１，３－ヘキサジエン、４，５－ジエチル－１，３－オクタジエン等が挙げられる。 The star polymer may be any polymer having a structure in which three or more chain polymers are bonded at one point.
Examples of the chain polymer constituting the star polymer include copolymers of vinyl aromatic monomers and conjugated diene monomers, hydrides thereof, and the like.
Examples of the vinyl aromatic monomer include styrene, alkyl-substituted styrene having 8 to 16 carbon atoms, alkoxy-substituted styrene having 8 to 16 carbon atoms, vinylnaphthalene, and alkyl-substituted vinylnaphthalene having 8 to 16 carbon atoms.
Conjugated diene monomers include conjugated dienes having 4 to 12 carbon atoms, specifically 1,3-butadiene, isoprene, piperylene, 4-methylpenta-1,3-diene, 3,4-dimethyl-1 ,3-hexadiene, 4,5-diethyl-1,3-octadiene and the like.
　本実施形態の二輪自動車用潤滑油組成物において、粘度指数向上剤（Ｄ）の樹脂分換算での含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１～１０質量％、より好ましくは０．０５～５．０質量％、更に好ましくは０．１０～２．０質量％、より更に好ましくは０．２０～１．０質量％である。 In the lubricating oil composition for motorcycles of the present embodiment, the content of the viscosity index improver (D) in terms of resin content is preferably 0.01 based on the total amount (100% by mass) of the lubricating oil composition. ~10 mass%, more preferably 0.05 to 5.0 mass%, still more preferably 0.10 to 2.0 mass%, still more preferably 0.20 to 1.0 mass%.
＜他の潤滑油用添加剤＞
　本実施形態の二輪自動車用潤滑油組成物は、本発明の効果を損なわない範囲で、上記成分以外の他の潤滑油用添加剤を含有してもよい。
　他の潤滑油用添加剤としては、例えば、耐摩耗剤、無灰系分散剤、酸化防止剤、流動点降下剤、金属系摩擦調整剤、防錆剤、金属不活性化剤、抗乳化剤、消泡剤等が挙げられる。
　これらの各潤滑油用添加剤は、単独で用いてもよく、２種以上を併用してもよい。 <Other lubricating oil additives>
The lubricating oil composition for a two-wheeled vehicle of the present embodiment may contain lubricating oil additives other than the above components within a range that does not impair the effects of the present invention.
Other lubricating oil additives include, for example, antiwear agents, ashless dispersants, antioxidants, pour point depressants, metallic friction modifiers, rust inhibitors, metal deactivators, demulsifiers, An antifoaming agent and the like are included.
Each of these lubricating oil additives may be used alone or in combination of two or more.
　耐摩耗剤としては、例えば、ジアルキルジチオリン酸亜鉛（ＺｎＤＴＰ）、リン酸亜鉛等の亜鉛含有化合物；ジスルフィド類、硫化オレフィン類、硫化油脂類、硫化エステル類、チオカーボネート類、チオカーバメート類、ポリサルファイド類等の硫黄含有化合物；亜リン酸エステル類、リン酸エステル類、ホスホン酸エステル類、及びこれらのアミン塩又は金属塩等のリン含有化合物；チオ亜リン酸エステル類、チオリン酸エステル類、チオホスホン酸エステル類、及びこれらのアミン塩又は金属塩等の硫黄及びリン含有耐摩耗剤などが挙げられる。
　これらの中でも、ジアルキルジチオリン酸亜鉛（ＺｎＤＴＰ）が好ましい。 Examples of antiwear agents include zinc-containing compounds such as zinc dialkyldithiophosphate (ZnDTP) and zinc phosphate; disulfides, sulfurized olefins, sulfurized fats and oils, sulfurized esters, thiocarbonates, thiocarbamates, and polysulfides sulfur-containing compounds such as; phosphites, phosphates, phosphonates, and phosphorous-containing compounds such as amine salts or metal salts thereof; Examples include sulfur- and phosphorus-containing antiwear agents such as esters, amine salts or metal salts thereof.
Among these, zinc dialkyldithiophosphate (ZnDTP) is preferred.
　無灰系分散剤としては、例えば、アルケニルコハク酸モノイミド及びアルキルコハク酸モノイミド等のコハク酸モノイミド；コハク酸モノイミドのホウ素変性体；アルケニルコハク酸ビスイミド及びアルキルコハク酸ビスイミド等のコハク酸ビスイミド；コハク酸ビスイミドのホウ素変性体からなる群から選択される１種以上の化合物が挙げられる。
　これらの中でも、コハク酸モノイミド（非ホウ素変性体）及びコハク酸ビスイミド（非ホウ素変性体）からなる群から選択される１種以上が好ましく、コハク酸ビスイミド（非ホウ素変性体）がより好ましい。 Examples of ashless dispersants include succinic acid monoimides such as alkenyl succinic acid monoimides and alkyl succinic acid monoimides; boron-modified succinic acid monoimides; succinic acid bisimides such as alkenyl succinic acid bisimides and alkyl succinic acid bisimides; One or more compounds selected from the group consisting of boron-modified bisimides are included.
Among these, one or more selected from the group consisting of succinic acid monoimide (non-boron-modified) and succinic acid bisimide (non-boron-modified) is preferable, and succinic acid bisimide (non-boron-modified) is more preferable.
　酸化防止剤としては、例えば、アミン系酸化防止剤、フェノール系酸化防止剤、モリブデン系酸化防止剤、硫黄系酸化防止剤、リン系酸化防止剤等が挙げられる。これらの中でも、アミン系酸化防止剤及びフェノール系酸化防止剤から選ばれる１種以上が好ましい。 Examples of antioxidants include amine-based antioxidants, phenol-based antioxidants, molybdenum-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants. Among these, one or more selected from amine-based antioxidants and phenol-based antioxidants are preferred.
　流動点降下剤としては、例えば、エチレン－酢酸ビニル共重合体、塩素化パラフィンとナフタレンとの縮合物、塩素化パラフィンとフェノールとの縮合物、ポリメタクリレート、ポリアルキルスチレン等が挙げられる。 Examples of pour point depressants include ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates, and polyalkylstyrenes.
　金属系摩擦調整剤としては、例えば、ジチオカルバミン酸モリブデン（ＭｏＤＴＣ）、ジチオリン酸モリブデン（ＭｏＤＴＰ）、モリブテン酸のアミン塩等のモリブデン系摩擦調整剤等が挙げられる。 Examples of metal-based friction modifiers include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid.
　防錆剤としては、例えば、脂肪酸、アルケニルコハク酸ハーフエステル、脂肪酸セッケン、アルキルスルホン酸塩、多価アルコール脂肪酸エステル、脂肪酸アミン、酸化パラフィン、アルキルポリオキシエチレンエーテル等が挙げられる。 Examples of rust preventives include fatty acids, alkenylsuccinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, and alkyl polyoxyethylene ethers.
　金属不活性化剤としては、例えば、ベンゾトリアゾール系化合物、トリルトリアゾール系化合物、チアジアゾール系化合物、イミダゾール系化合物、ピリミジン系化合物等が挙げられる。 Examples of metal deactivators include benzotriazole-based compounds, tolyltriazole-based compounds, thiadiazole-based compounds, imidazole-based compounds, and pyrimidine-based compounds.
　抗乳化剤としては、例えば、ひまし油の硫酸エステル塩、石油スルフォン酸塩等のアニオン性界面活性剤；第四級アンモニウム塩、イミダゾリン類等のカチオン性界面活性剤；ポリオキシアルキレンポリグリコール及びそのジカルボン酸のエステル；アルキルフェノール－ホルムアルデヒド重縮合物のアルキレンオキシド付加物；等が挙げられる。 Examples of demulsifiers include anionic surfactants such as castor oil sulfates and petroleum sulfonates; cationic surfactants such as quaternary ammonium salts and imidazolines; polyoxyalkylene polyglycols and their dicarboxylic acids. esters; alkylene oxide adducts of alkylphenol-formaldehyde polycondensates; and the like.
　消泡剤としては、例えば、シリコーン系消泡剤、フルオロシリコーン油、及びフルオロアルキルエーテル等のフッ素系消泡剤、ポリアクリレート系消泡剤等が挙げられる。 Examples of antifoaming agents include fluorine antifoaming agents such as silicone antifoaming agents, fluorosilicone oils, and fluoroalkyl ethers, and polyacrylate antifoaming agents.
　上記した他の潤滑油用添加剤の含有量は、本発明の効果を損なわない範囲内で、適宜調整することができるが、その各々について、二輪自動車用潤滑油組成物の全量（１００質量％）基準で、通常０．００１～１５質量％、好ましくは０．００５～１０質量％、より好ましくは０．０１～７質量％、更に好ましくは０．０３～５質量％である。 The content of the other lubricating oil additives described above can be adjusted as appropriate within a range that does not impair the effects of the present invention. ), it is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 7% by mass, still more preferably 0.03 to 5% by mass.
　本実施形態の二輪自動車用潤滑油組成物において、成分（Ａ）、成分（Ｂ）、成分（Ｃ）及び成分（Ｄ）の合計含有量は、潤滑油組成物の全量（１００質量％）基準で、好ましくは６０質量％以上、より好ましくは７０質量％以上、更に好ましくは８０質量％以上、より更に好ましくは９０質量％以上、特に好ましくは９５質量％以上であり、また、通常１００質量％以下である。 In the lubricating oil composition for two-wheeled vehicles of the present embodiment, the total content of component (A), component (B), component (C) and component (D) is the total amount of the lubricating oil composition (100% by mass) basis , preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, particularly preferably 95% by mass or more, and usually 100% by mass It is below.
［二輪自動車用潤滑油組成物の各種性状］
　本実施形態の二輪自動車用潤滑油組成物の１００℃における動粘度は、好ましくは６．０～２０．０ｍｍ２／ｓ、より好ましくは７．０～１８．０ｍｍ２／ｓ、更に好ましくは８．０～１７．０ｍｍ２／ｓである。
　また、本実施形態の二輪自動車用潤滑油組成物の４０℃における動粘度は、好ましくは２０．０～１４０．０ｍｍ２／ｓ、より好ましくは４０．０～１００．０ｍｍ２／ｓ、更に好ましくは５０．０～９５．０ｍｍ２／ｓである。
　本実施形態の二輪自動車用潤滑油組成物の粘度指数は、好ましくは１００以上、より好ましくは１２０以上、更に好ましくは１３０以上である。 [Various properties of the lubricating oil composition for two-wheeled vehicles]
The kinematic viscosity at 100° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 6.0 to 20.0 mm 2 /s, more preferably 7.0 to 18.0 mm 2 /s, still more preferably 8 .0 to 17.0 mm 2 /s.
In addition, the kinematic viscosity at 40° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 20.0 to 140.0 mm 2 /s, more preferably 40.0 to 100.0 mm 2 /s, and even more preferably is 50.0 to 95.0 mm 2 /s.
The viscosity index of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 100 or higher, more preferably 120 or higher, and even more preferably 130 or higher.
　本実施形態の二輪自動車用潤滑油組成物において、ＭＴＭ試験機を用いて後述の実施例に記載の条件に基づき測定した摩擦係数は、０．０９００未満であることを要し、好ましくは０．０８８０以下、より好ましくは０．０８７０以下、更に好ましくは０．０８６０以下である。上記摩擦係数の下限値としては、他の特性とのバランスを考慮して、好ましくは０．０６００以上、より好ましくは０．０７００以上、更に好ましくは０．０８００以上である。
　また、本実施形態の二輪自動車用潤滑油組成物は、ＪＡＳＯ　Ｔ９０３：２０１６のクラッチ摩擦特性試験に準拠して評価された性能分類がＭＡ２であることが好ましい。 In the lubricating oil composition for a two-wheeled vehicle of the present embodiment, the coefficient of friction measured using an MTM tester under the conditions described in Examples below should be less than 0.0900, preferably less than 0.0900. 0880 or less, more preferably 0.0870 or less, and still more preferably 0.0860 or less. The lower limit of the coefficient of friction is preferably 0.0600 or more, more preferably 0.0700 or more, still more preferably 0.0800 or more, in consideration of the balance with other properties.
Moreover, the lubricating oil composition for a two-wheeled vehicle of the present embodiment preferably has a performance classification of MA2 as evaluated in accordance with the clutch friction characteristic test of JASO T903:2016.
［ＨＴＨＳ粘度］
　本実施形態の二輪自動車用潤滑油組成物の１５０℃におけるＨＴＨＳ粘度は、好ましくは１．５ｍＰａ・ｓ以上であり、より好ましくは１．７ｍＰａ・ｓ以上であり、よりさらに好ましくは、２．９ｍＰａ・ｓ以上である。また、好ましくは４．０ｍＰａ・ｓ未満であり、より好ましくは３．９ｍＰａ・ｓ未満であり、さらに好ましくは３．５ｍＰａ・ｓ未満である。
　本実施形態の二輪自動車用潤滑油組成物の１５０℃におけるＨＴＨＳ粘度は、ＡＳＴＭ　Ｄ４６８３に準拠し、ＴＢＳ高温粘度計（Ｔａｐｅｒｅｄ　Ｂｅａｒｉｎｇ　Ｓｉｍｕｌａｔｏｒ　Ｖｉｓｃｏｍｅｔｅｒ）を用いて、せん断速度１０６／ｓにて測定できる。 [HTHS viscosity]
The HTHS viscosity at 150° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment is preferably 1.5 mPa·s or more, more preferably 1.7 mPa·s or more, and even more preferably 2.9 mPa. • s or more. Also, it is preferably less than 4.0 mPa·s, more preferably less than 3.9 mPa·s, still more preferably less than 3.5 mPa·s.
The HTHS viscosity at 150° C. of the lubricating oil composition for two-wheeled vehicles of the present embodiment can be measured at a shear rate of 10 6 /s using a TBS high temperature viscometer (Tapered Bearing Simulator Viscometer) according to ASTM D4683.
［潤滑油組成物の用途］
　本実施形態の潤滑油組成物は、エンジン用潤滑油と動力伝達用潤滑油とを同一の油剤で潤滑する二輪自動車に供される。 [Use of lubricating oil composition]
The lubricating oil composition of the present embodiment is provided for a two-wheeled vehicle in which the engine lubricating oil and the power transmission lubricating oil are lubricated with the same oil agent.
　また、本実施形態は、上記二輪自動車用潤滑油組成物を用いて二輪自動車のエンジン及び変速機を潤滑する潤滑方法をも提供する。
　さらに、本実施形態は、基油（Ａ）と、金属フェネート（Ｂ）とを混合する二輪自動車用潤滑油組成物の製造方法であって、前記二輪自動車用潤滑油組成物の、ＭＴＭ試験機を用いて前述の条件にて測定された摩擦係数が０．０９００未満である二輪自動車用潤滑油組成物の製造方法をも提供する。 The present embodiment also provides a lubricating method for lubricating an engine and a transmission of a two-wheeled vehicle using the lubricating oil composition for a two-wheeled vehicle.
Furthermore, the present embodiment is a method for producing a lubricating oil composition for a two-wheeled vehicle by mixing a base oil (A) and a metal phenate (B), wherein the lubricating oil composition for a two-wheeled vehicle is tested by an MTM tester. Also provided is a method for producing a lubricating oil composition for a two-wheeled vehicle having a coefficient of friction of less than 0.0900 as measured under the conditions described above.
　なお、上記潤滑方法や二輪自動車用潤滑油組成物の製造方法における二輪自動車用潤滑油組成物について、各成分の好適な態様、二輪自動車用潤滑油組成物の好適な性状等は、上述のとおりである。 Regarding the lubricating oil composition for two-wheeled vehicles in the lubricating method or the method for producing a lubricating oil composition for two-wheeled vehicles, preferred aspects of each component, suitable properties of the lubricating oil composition for two-wheeled vehicles, etc. are as described above. is.
　次に、本発明を実施例により更に詳細に説明するが、本発明はこれらの例によって何ら限定されるものではない。なお、実施例及び比較例で用いた各成分及び得られた潤滑油組成物の各種性状は、下記方法によって測定した。 Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited by these examples. Each component used in Examples and Comparative Examples and various properties of the obtained lubricating oil composition were measured by the following methods.
＜動粘度、粘度指数＞
　ＪＩＳ　Ｋ　２２８３：２０００に準拠して測定又は算出した。
＜ＨＴＨＳ粘度＞
　潤滑油組成物のＨＴＨＳ粘度を、ＡＳＴＭ　Ｄ４６８３に準拠し、ＴＢＳ高温粘度計（Ｔａｐｅｒｅｄ　Ｂｅａｒｉｎｇ　Ｓｉｍｕｌａｔｏｒ　Ｖｉｓｃｏｍｅｔｅｒ）を用いて、１５０℃の温度条件下、せん断速度１０６／ｓにて測定した。
＜カルシウム原子の含有量＞
　ＪＰＩ－５Ｓ－３８－０３に準拠して測定した。
＜塩基価（過塩素酸法）＞
　ＪＩＳ　Ｋ　２５０１に準拠して測定した。 <Kinematic viscosity, viscosity index>
It was measured or calculated according to JIS K 2283:2000.
<HTHS viscosity>
The HTHS viscosity of the lubricating oil composition was measured according to ASTM D4683 using a TBS high temperature viscometer (Tapered Bearing Simulator Viscometer) at a temperature of 150° C. and a shear rate of 10 6 /s.
<Content of calcium atoms>
Measured according to JPI-5S-38-03.
<Base value (perchloric acid method)>
Measured according to JIS K 2501.
実施例１～２、比較例１～４
　以下に示す基油及び各種添加剤を、表１に示す配合量にて添加して、十分に混合して潤滑油組成物をそれぞれ調製した。
　実施例及び比較例で用いた基油及び各種添加剤の詳細は、以下に示すとおりである。 Examples 1-2, Comparative Examples 1-4
The following base oils and various additives were added in the compounding amounts shown in Table 1 and thoroughly mixed to prepare lubricating oil compositions.
The details of the base oils and various additives used in Examples and Comparative Examples are as follows.
（成分（Ａ））
・基油：ＡＰＩ基油カテゴリーでグループ３に分類される、水素化精製処理が施された鉱油（４０℃動粘度＝３５．３８ｍｍ２／ｓ、１００℃動粘度＝６．３８１ｍｍ２／ｓ、粘度指数＝１３３）。 (Component (A))
・Base oil: Hydrorefined mineral oil classified into Group 3 in the API base oil category (40°C kinematic viscosity = 35.38 mm 2 /s, 100°C kinematic viscosity = 6.381 mm 2 /s, Viscosity index = 133).
（成分（Ｂ））
・過塩基性Ｃａフェネート１：カルシウムフェネート、塩基価２５１ｍｇＫＯＨ／ｇ、カルシウム原子の含有量９．５質量％、硫黄原子の含有量３．０７質量％。
・過塩基性Ｃａフェネート２：カルシウムフェネート、塩基価２５０ｍｇＫＯＨ／ｇ、カルシウム原子の含有量９．２５質量％、硫黄原子の含有量３．４６質量％。 (Component (B))
- Overbased Ca phenate 1: calcium phenate, base number 251 mgKOH/g, content of calcium atoms 9.5% by mass, content of sulfur atoms 3.07% by mass.
- Overbased Ca phenate 2: calcium phenate, base number 250 mgKOH/g, content of calcium atoms 9.25% by mass, content of sulfur atoms 3.46% by mass.
（成分（Ｃ））
・過塩基性Ｃａスルホネート１：カルシウムスルホネート、塩基価２５１ｍｇＫＯＨ／ｇ、カルシウム原子の含有量１１．９質量％。
・過塩基性Ｃａスルホネート２：カルシウムスルホネート、塩基価３０７ｍｇＫＯＨ／ｇ、カルシウム原子の含有量１１．６質量％。
・過塩基性Ｃａサリチレート：カルシウムサリチレート、塩基価２２５ｍｇＫＯＨ／ｇ、カルシウム原子の含有量８．０質量％。 (Component (C))
- Overbased Ca sulfonate 1: calcium sulfonate, base number 251 mgKOH/g, content of calcium atoms 11.9% by mass.
- Overbased Ca sulfonate 2: calcium sulfonate, base value 307 mgKOH/g, content of calcium atoms 11.6% by mass.
- Overbased Ca salicylate: calcium salicylate, base number 225 mgKOH/g, content of calcium atoms 8.0% by mass.
（成分（Ｄ））
・粘度指数向上剤：Ｉｎｆｉｎｅｕｍ社製ｄｉｂｌｏｃｋ　ｓｔａｒポリマー、重量平均分子量７８０，０００。 (Component (D))
• Viscosity index improver: Infineum diblock star polymer, weight average molecular weight 780,000.
（その他添加剤）
　流動点降下剤、消泡剤、分散剤、酸化防止剤、耐摩耗剤（ジアルキルジチオリン酸亜鉛（ＺｎＤＴＰ））、及び金属系清浄剤を含有する添加剤パッケージ。 (Other additives)
An additive package containing pour point depressants, antifoam agents, dispersants, antioxidants, antiwear agents (zinc dialkyldithiophosphates (ZnDTP)), and metallic detergents.
　また、調製した潤滑油組成物について、以下の試験を行った。これらの結果を表１に示す。 In addition, the following tests were conducted on the prepared lubricating oil composition. These results are shown in Table 1.
［金属間摩擦係数］
　ＭＴＭ（Mini　Traction　Machine）試験機を用い、下記の条件にて摩擦係数を測定した。摩擦係数の値は、摩擦係数０．０９００未満であると、良好であると判断した。
　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
　・運転時間：２時間
　・荷重：３０Ｎ
　・油温：８０℃
　・速度：１００ｍｍ／ｓ
　・すべり率（ＳＲＲ）：５０％ [Coefficient of friction between metals]
Using an MTM (Mini Traction Machine) tester, the coefficient of friction was measured under the following conditions. A coefficient of friction value of less than 0.0900 was judged to be good.
・Test piece: disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
・Operating time: 2 hours ・Load: 30N
・Oil temperature: 80℃
・Speed: 100mm/s
・Slip ratio (SRR): 50%
［クラッチ摩擦特性］
　ＪＡＳＯ　Ｔ９０３：２０１６に記載のクラッチ摩擦特性評価試験方法に準拠して、下記の試験条件により、潤滑油組成物のクラッチ摩擦特性のグレードを分類した。「ＭＡ」、「ＭＡ１」及び「ＭＡ２」はクラッチ摩擦特性が良好なグレードであることを示し、「ＭＡ２」はクラッチ摩擦特性が最良なグレードであることを示す
＜試験条件＞
・試験機：ＳＡＥ　Ｎｏ．２試験機（オートマックス株式会社製）
・動摩擦試験：ＪＡＳＯ　Ｍ３４８の３．３．１準拠・静摩擦試験：ＪＡＳＯ　Ｍ３４８の３．３．２準拠
・試験サイクル：１，０００回・評価法：ＪＡＳＯ　Ｔ９０３：２０１６に準拠して、ＭＢ、ＭＡ、ＭＡ１及びＭＡ２のグレードに分類。潤滑油組成物がＪＡＳＯ　Ｔ９０３：２０１６に規定する物理化学性状を満たさないものは「規格外」とした。 [Clutch friction characteristics]
Based on the clutch friction property evaluation test method described in JASO T903:2016, the grades of the clutch friction property of the lubricating oil composition were classified according to the following test conditions. "MA", "MA1" and "MA2" indicate the grade with good clutch friction characteristics, and "MA2" indicates the grade with the best clutch friction characteristics <Test conditions>
・Testing machine: SAE No. 2 testing machine (manufactured by Automax Co., Ltd.)
・Dynamic friction test: compliant with JASO M348 3.3.1 ・Static friction test: compliant with JASO M348 3.3.2 ・Test cycle: 1,000 times ・Evaluation method: MB, MA in accordance with JASO T903:2016 , MA1 and MA2 grades. Lubricating oil compositions that did not satisfy the physicochemical properties specified in JASO T903:2016 were rated as "out of specification".
［ホットチューブ試験］
　試験油（調製した潤滑油組成物）に対し、ＪＰＩ－５Ｓ－５５－９９に準拠し、試験温度２９０℃、試験時間１６時間で、ホットチューブ試験を実施した。
　試験後の評点はＪＰＩ－５Ｓ－５５－９９に準拠してテストチューブに付着したラッカーを０点（黒色）～１０点（無色）の２１段階にて評価した。
　評点は、数字が大きいほど堆積物が少なく清浄性が良好であることを示す。
　本実施例では、評点８．０点以上である潤滑油組成物を合格とした。 [Hot tube test]
A hot tube test was performed on the test oil (prepared lubricating oil composition) according to JPI-5S-55-99 at a test temperature of 290° C. for a test time of 16 hours.
After the test, the lacquer adhering to the test tube was evaluated according to JPI-5S-55-99 on a 21-point scale from 0 (black) to 10 (colorless).
A higher score indicates less deposits and better cleanliness.
In this example, lubricating oil compositions with a score of 8.0 or higher were considered acceptable.
［シフトフィーリング］
　被験者４名による走行試験を実施し、シフトペダル操作性について評点法による評価を行った。また、走行試験中の引っ掛かりの発生頻度を測定し、評価を行った。
（走行条件）
　一般コンクリート舗装道路を、３０～６０ｋｍ／ｈの速度で走行し、その間にシフトポジションを段階的に変更した。エンジン回転数は４，０００～６，５００ｒｐｍとなるように設定した。
（評点）
　所定の基準油を基準の０．０点とし、シフトペダルの操作性が良好である場合にはプラス、シフトペダルの操作性が悪い場合にはマイナスとして、＋２．０～－２．０の間の評点を付した。 [Shift feeling]
A running test was conducted by four test subjects, and shift pedal operability was evaluated by a scoring method. In addition, the frequency of occurrence of sticking during the running test was measured and evaluated.
(running conditions)
A general concrete paved road was run at a speed of 30 to 60 km/h, during which the shift position was changed in stages. The engine speed was set to 4,000 to 6,500 rpm.
(Rating)
With a predetermined reference oil as a reference point of 0.0, plus when the operability of the shift pedal is good, minus when the operability of the shift pedal is poor, between +2.0 and -2.0 was given a rating of
Figure JPOXMLDOC01-appb-T000001
 
Figure JPOXMLDOC01-appb-T000001
 
　実施例１及び２で調製した潤滑油組成物は、エンジン油潤滑油として要求される高温清浄性を満たし、かつ、湿式クラッチにおける高い摩擦係数を維持しつつも、シフトフィーリングが良好であった。
　これに対し、比較例１～４で調製した潤滑油組成物は、ＭＴＭ試験機を用いて測定された金属間摩擦係数が高く、また被験者の評価によるシフトフィーリングが不十分なものであった。さらに、比較例１及び２で調製した潤滑油組成物は、クラッチ摩擦特性がＭＡであった。加えて、比較例１及び４で調製した潤滑油組成物は、ホットチューブ試験における評点が８．０未満であり、高温清浄性に劣るものであった。

  The lubricating oil compositions prepared in Examples 1 and 2 satisfied the high-temperature detergency required as an engine oil lubricating oil, and maintained a high friction coefficient in a wet clutch, while providing good shift feeling. .
On the other hand, the lubricating oil compositions prepared in Comparative Examples 1 to 4 had a high metal-to-metal friction coefficient measured using an MTM tester, and the shift feeling evaluated by subjects was insufficient. . Furthermore, the lubricating oil compositions prepared in Comparative Examples 1 and 2 had MA clutch friction characteristics. In addition, the lubricating oil compositions prepared in Comparative Examples 1 and 4 scored less than 8.0 in the hot tube test, indicating poor high temperature detergency.

Claims (8)

  1. 　基油（Ａ）と、金属フェネート（Ｂ）とを含有し、かつ、ＭＴＭ試験機を用いて下記の条件にて測定された摩擦係数が０．０９００未満である二輪自動車用潤滑油組成物。
    　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
    　・運転時間：２時間
    　・荷重：３０Ｎ
    　・油温：８０℃
    　・速度：１００ｍｍ／ｓ
    　・すべり率（ＳＲＲ）：５０％     A lubricating oil composition for motorcycles containing a base oil (A) and a metal phenate (B) and having a coefficient of friction of less than 0.0900 as measured using an MTM tester under the following conditions.
    ・Test piece: disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
    ・Operating time: 2 hours ・Load: 30N
    ・Oil temperature: 80℃
    ・Speed: 100mm/s
    ・Slip ratio (SRR): 50%
  2. 　前記金属フェネート（Ｂ）中における硫黄原子の含有量が、１．００～８．００質量％である請求項１に記載の二輪自動車用潤滑油組成物。 The lubricating oil composition for a two-wheeled vehicle according to claim 1, wherein the content of sulfur atoms in the metal phenate (B) is 1.00 to 8.00% by mass.
  3. 　前記金属フェネート（Ｂ）が、過塩基性カルシウムフェネートである請求項１又は２に記載の二輪自動車用潤滑油組成物。 The lubricating oil composition for two-wheeled vehicles according to claim 1 or 2, wherein the metal phenate (B) is an overbased calcium phenate.
  4. 　前記金属フェネート（Ｂ）の含有量が前記潤滑油組成物全量基準で１．１０質量％以上２．００質量％以下である請求項１～３のいずれか１項に記載の二輪自動車用潤滑油組成物。 The lubricating oil for motorcycles according to any one of claims 1 to 3, wherein the content of the metal phenate (B) is 1.10% by mass or more and 2.00% by mass or less based on the total amount of the lubricating oil composition. Composition.
  5. 　さらに、粘度指数向上剤（Ｄ）を含有する請求項１～４のいずれか１項に記載の二輪自動車用潤滑油組成物。 The lubricating oil composition for two-wheeled vehicles according to any one of claims 1 to 4, further comprising a viscosity index improver (D).
  6. 　ＪＡＳＯ　Ｔ９０３：２０１６のクラッチ摩擦特性試験に準拠して評価された性能分類がＭＡ２である請求項１～５のいずれか１項に記載の二輪自動車用潤滑油組成物。 The lubricating oil composition for two-wheeled vehicles according to any one of claims 1 to 5, which has a performance classification of MA2 evaluated in accordance with the clutch friction characteristic test of JASO T903:2016.
  7. 　請求項１～６のいずれか１項に記載の二輪自動車用潤滑油組成物を用いて二輪自動車のエンジン及び変速機を潤滑する潤滑方法。 A lubricating method for lubricating an engine and a transmission of a two-wheeled vehicle using the lubricating oil composition for two-wheeled vehicles according to any one of claims 1 to 6.
  8. 　基油（Ａ）と、金属フェネート（Ｂ）とを混合する二輪自動車用潤滑油組成物の製造方法であって、前記二輪自動車用潤滑油組成物の、ＭＴＭ試験機を用いて下記の条件にて測定された摩擦係数が０．０９００未満である二輪自動車用潤滑油組成物の製造方法。
    　・試験片：標準テストピース（ＡＩＳＩ　５２１００）のディスク及び同材質のボール（３／４インチ）
    　・運転時間：２時間
    　・荷重：３０Ｎ
    　・油温：８０℃
    　・速度：１００ｍｍ／ｓ
    　・すべり率（ＳＲＲ）：５０％     A method for producing a lubricating oil composition for a two-wheeled vehicle by mixing a base oil (A) and a metal phenate (B), wherein the lubricating oil composition for a two-wheeled vehicle is tested under the following conditions using an MTM tester. A method for producing a lubricating oil composition for a two-wheeled vehicle having a coefficient of friction of less than 0.0900 as measured by
    ・Test piece: disk of standard test piece (AISI 52100) and ball (3/4 inch) of the same material
    ・Operating time: 2 hours ・Load: 30N
    ・Oil temperature: 80℃
    ・Speed: 100mm/s
    ・Slip ratio (SRR): 50%
PCT/JP2023/005249 2022-02-28 2023-02-15 Lubricating oil composition for two-wheeled motor vehicles WO2023162819A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003041283A (en) * 2001-07-31 2003-02-13 Nippon Oil Corp Lubricating oil composition
WO2009118984A1 (en) * 2008-03-27 2009-10-01 新日本石油株式会社 Lubricating oil composition
JP2012131986A (en) * 2010-11-29 2012-07-12 Chevron Japan Ltd Lubricating oil composition for lubricating automotive engine
JP2013185087A (en) * 2012-03-08 2013-09-19 Chevron Japan Ltd Lubricant composition for automobile engine lubrication
WO2014189057A1 (en) * 2013-05-20 2014-11-27 出光興産株式会社 Lubricant composition
WO2018105496A1 (en) * 2016-12-05 2018-06-14 出光興産株式会社 Lubricant oil composition and method for manufacturing same
WO2019230689A1 (en) * 2018-05-29 2019-12-05 出光興産株式会社 Lubricating oil composition and production method therefor
JP2020500959A (en) * 2016-11-30 2020-01-16 シェブロンジャパン株式会社 Motorcycle lubricating oil composition

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003041283A (en) * 2001-07-31 2003-02-13 Nippon Oil Corp Lubricating oil composition
WO2009118984A1 (en) * 2008-03-27 2009-10-01 新日本石油株式会社 Lubricating oil composition
JP2012131986A (en) * 2010-11-29 2012-07-12 Chevron Japan Ltd Lubricating oil composition for lubricating automotive engine
JP2013185087A (en) * 2012-03-08 2013-09-19 Chevron Japan Ltd Lubricant composition for automobile engine lubrication
WO2014189057A1 (en) * 2013-05-20 2014-11-27 出光興産株式会社 Lubricant composition
JP2020500959A (en) * 2016-11-30 2020-01-16 シェブロンジャパン株式会社 Motorcycle lubricating oil composition
WO2018105496A1 (en) * 2016-12-05 2018-06-14 出光興産株式会社 Lubricant oil composition and method for manufacturing same
WO2019230689A1 (en) * 2018-05-29 2019-12-05 出光興産株式会社 Lubricating oil composition and production method therefor

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