WO2023162819A1 - Composition d'huile lubrifiante pour véhicules à moteur à deux roues - Google Patents

Composition d'huile lubrifiante pour véhicules à moteur à deux roues 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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English (en)
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/fr

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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.

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

Abstract

L'invention concerne une composition d'huile lubrifiante pour véhicules à moteur à deux roues qui comprend une huile de base (A) et un phénate métallique (B) et a un coefficient de frottement, tel que mesuré à l'aide d'une machine d'essai MTM dans les conditions ci-dessous, inférieure à 0,0900. La composition d'huile lubrifiante pour véhicules à moteur à deux roues satisfait les performances requises d'huiles lubrifiantes pour moteurs, conserve un coefficient de frottement élevé dans des embrayages humides, et confère une excellente sensation de changement de rapport.　· Pièces de test : disque de pièce de test standard (AISI 52100) et bille (3/4 pouce) de même matériau. Temps de fonctionnement : 10 minutes · Charge : 30 N · température d'huile : 80 °C · Vitesse : 100 mm/s · rapport glissement-à-roulement (SRR) : 50%
PCT/JP2023/005249 2022-02-28 2023-02-15 Composition d'huile lubrifiante pour véhicules à moteur à deux roues WO2023162819A1 (fr)

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