WO2021200045A1 - Composition d'huile lubrifiante et procédé d'utilisation d'huile lubrifiante - Google Patents

Composition d'huile lubrifiante et procédé d'utilisation d'huile lubrifiante Download PDF

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Publication number
WO2021200045A1
WO2021200045A1 PCT/JP2021/010164 JP2021010164W WO2021200045A1 WO 2021200045 A1 WO2021200045 A1 WO 2021200045A1 JP 2021010164 W JP2021010164 W JP 2021010164W WO 2021200045 A1 WO2021200045 A1 WO 2021200045A1
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Prior art keywords
lubricating oil
oil composition
mass
less
polymer
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PCT/JP2021/010164
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English (en)
Japanese (ja)
Inventor
元治 石川
貴登 原山
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出光興産株式会社
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Priority to CN202180025804.5A priority Critical patent/CN115298291A/zh
Priority to JP2022511776A priority patent/JPWO2021200045A1/ja
Publication of WO2021200045A1 publication Critical patent/WO2021200045A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/16—Amides; Imides
    • 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
    • C10M133/56—Amides; Imides
    • 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 and a method of using the lubricating oil composition.
  • Patent Document 1 contains a predetermined amount of a magnesium detergent and zinc dialkylthiophosphate in a lubricating oil base oil for the purpose of providing a lubricating oil composition capable of reducing friction even when the viscosity is lowered.
  • a lubricating oil composition in which the content of boron is limited to less than 100% by mass is disclosed.
  • the present invention provides a lubricating oil composition containing an imide succinimide and a polymer in a predetermined content, together with a mineral oil that meets specific requirements.
  • Specific aspects of the present invention are as follows [1] to [14].
  • Mineral oil (A) has the following requirements (a1) to (a3) -Requirement (a1): The kinematic viscosity at 100 ° C.
  • Ratio of the content of imide succinimide (B) in terms of nitrogen atom (unit: mass%) to the content of polymer (C) in terms of resin content (unit: mass%) [(B) / (C)] is 0.001 to 5.00, the lubricating oil composition according to the above [1].
  • [3] The lubricating oil composition according to the above [1] or [2], wherein the polymer (C) contains a comb-shaped polymer (C1).
  • the weight average molecular weight (Mw) of the comb polymer (C1) is 200,000 to 1,000,000, and the molecular weight distribution (Mw / Mn) (Mn is the number average molecular weight of the comb polymer (C1)) is 4.0 or less.
  • the lubricating oil composition according to any one of the above [1] to [11] is applied to lubrication of an engine mounted on a hybrid car or an engine mounted on a generator for an electric vehicle. , How to use the lubricating oil composition.
  • the lubricating oil composition of one preferred embodiment of the present invention is excellent in, for example, hydraulic properties, fuel saving properties, and oil consumption suppressing properties, and is particularly mounted on a hybrid car engine or a generator for an electric vehicle. It can be suitably applied to the lubrication of the engine.
  • the kinematic viscosity and the viscosity index mean values measured or calculated in accordance with JIS K2283: 2000.
  • the weight average molecular weight (Mw) and the number average molecular weight (Mn) are values in terms of standard polystyrene measured by a gel permeation chromatography (GPC) method, and are specifically described in Examples. Means the value measured by the method.
  • the upper limit value and the lower limit value can be arbitrarily combined.
  • the numerical range is described as "preferably 30 to 100, more preferably 40 to 80”
  • the range of "30 to 80” and the range of "40 to 100” are also described in the present specification. It is included in the numerical range.
  • the description of "60 to 100” means that the range is "60 or more and 100 or less”.
  • a numerical range of the lower limit value to the upper limit value can be defined by appropriately selecting from each option and arbitrarily combining them.
  • the lubricating oil composition of the present invention contains mineral oil (A), succinimide (B), and polymer (C), but preferably further contains a friction modifier (D). Further, the lubricating oil composition according to one aspect of the present invention may further contain components other than the components (A) to (D), if necessary, as long as the effects of the present invention are not impaired.
  • the total content of the components (A), (B) and (C) is preferably 45% by mass based on the total amount (100% by mass) of the lubricating oil composition. More preferably 55% by mass or more, further preferably 65% by mass or more, still more preferably 75% by mass or more, particularly preferably 85% by mass or more, and further preferably 87% by mass or more, or 90% by mass or more. May be good.
  • the mineral oil (A) used in one embodiment of the present invention includes, for example, atmospheric residual oil obtained by atmospheric distillation of crude oils such as paraffin crude oil, intermediate base crude oil, and naphthenic crude oil; these atmospheric residual oils. Distillate oil obtained by distillation under reduced pressure; the distillate oil is subjected to one or more purification treatments such as solvent removal, solvent extraction, hydrocracking, solvent removal, contact removal, and hydrorefining. Examples thereof include refined oils obtained; mineral oils (GTL) obtained by isomerizing wax (GTL wax (Gas To Liquids WAX)) produced from natural gas by the Fisher-Tropsch method or the like. These mineral oils may be used alone or in combination of two or more.
  • crude oils such as paraffin crude oil, intermediate base crude oil, and naphthenic crude oil
  • Distillate oil obtained by distillation under reduced pressure the distillate oil is subjected to one or more purification treatments such as solvent removal, solvent extraction, hydrocracking, solvent removal, contact removal, and hydrorefining. Examples thereof include
  • the mineral oil (A) used in the present invention satisfies the following requirements (a1) to (a3).
  • -Requirement (a1) The kinematic viscosity at 100 ° C. is less than 3.10 mm 2 / s.
  • -Requirement (a2) The NOACK value is 36.0% by mass or less.
  • the mineral oil (A) used in one aspect of the present invention preferably further satisfies at least one of the following requirements (a4) and (a5) in addition to the above requirements (a1) to (a3), and the following requirement (a4).
  • the kinematic viscosity at 100 ° C. in mineral oil (A) as defined in the above requirement (a1) is less than 3.10 mm 2 / s, preferably 3.05mm less than 2 / s, more preferably 3. 00mm less than 2 / s, more preferably 2.98mm less than 2 / s, even more preferably less than 2.97 mm 2 / s.
  • the kinematic viscosity of the mineral oil (A) at 100 ° C. is appropriately set within a range that satisfies the other requirements described above, but is preferably 2.00 mm 2 / s or more, more preferably 2.10 mm. 2 / s or greater, more preferably 2.20 mm 2 / s or greater, even more preferably 2.30 mm 2 / s or greater, particularly preferably 2.40 mm 2 / s or greater.
  • the kinematic viscosity at 100 ° C. in mineral oil (A) used in one embodiment of the present invention is preferably 2.00 mm 2 / s or more 3.10mm less than 2 / s, more preferably 2.10 mm 2 / s or more 3.
  • the NOACK value of the mineral oil (A) specified in the above requirement (a2) is 36.0% by mass or less, preferably 35.5% by mass or less, more preferably 35.0% by mass or less. It is more preferably 34.5% by mass or less, still more preferably 34.0% by mass or less, and further preferably 33.5% by mass or less, 33.0% by mass or less, 32.5% by mass or less, or 32.0. It may be mass% or less.
  • the NOACK value of the mineral oil (A) is appropriately set within a range that satisfies the above-mentioned other requirements for the lower limit, but is preferably 1.0% by mass or more, more preferably 5.0% by mass or more. It is more preferably 10.0% by mass or more, still more preferably 15.0% by mass or more, and particularly preferably 20.0% by mass or more. That is, the NOACK value of the mineral oil (A) used in one aspect of the present invention is preferably 1.0 to 36.0% by mass, more preferably 5.0 to 35.5% by mass, and even more preferably 10.0 to 30.5% by mass. It is 35.0% by mass, more preferably 15.0 to 34.5% by mass, and particularly preferably 20.0 to 34.0% by mass. In this specification, the NOACK value means a value measured at 250 ° C. in accordance with JPI-5S-41-2004.
  • the mineral oil (A) becomes the mineral oil (A) in which the evaporation loss is suppressed even if the viscosity is low, so that the lubricating oil has improved both fuel efficiency and oil consumption suppression. It can be a composition.
  • % C P of the mineral oil (A) as defined in the above requirement (a3) is at 75.0 or more, preferably 77.0 or more, more preferably 78.5 or more, more preferably 80. It is 0 or more, more preferably 82.0 or more, and may be 83.0 or more, 85.0 or more, 87.0 or more, or 90.0 or more.
  • % C P of the mineral oil (A) is for the provision of the upper limit is appropriately set in a range satisfying the other requirements mentioned above, preferably 99.0 or less, more preferably 98.0 or less, more preferably 97.0 or less, even more preferably 96.0 or less, particularly preferably 95.0 or less, and further 94.0 or less, 93.0 or less, 92.0 or less, 91.0 or less, or 90.0. It may be as follows. That,% C P of the mineral oil (A) used in one embodiment of the present invention is preferably 75.0 to 99.0, more preferably 77.0 to 98.0, more preferably 78.5 to 97.0 , More preferably 80.0 to 96.0, and particularly preferably 82.0 to 95.0.
  • the mineral oil (A) used in one aspect of the present invention can be a lubricating oil composition in which evaporation loss is suppressed even if the viscosity is low.
  • % C N of mineral oil (A) as defined in the above requirement (a4) is preferably 3.0 to 25.0 more preferably 4.0 to 22.0, more preferably from 5 It is 0.0 to 20.0, more preferably 6.0 to 19.0, and particularly preferably 6.5 to 18.0.
  • % C N of mineral oil (A) may further 6.8 or more, 7.0 or more, 8.0 or more, 9.0 or more, or may be a 10.0 or more and 17.5 or less, It may be 17.0 or less, 16.0 or less, 15.0 or less, or 14.0 or less.
  • % C P and% C N means a value measured in accordance with ASTM D-3238 ring analysis (n-d-M method).
  • the mineral oil (A) used in one aspect of the present invention can be a lubricating oil composition in which the evaporation loss of the mineral oil (A) is reduced and the oil consumption is suppressed. ..
  • the temperature at which the distillate amount of the light distillate is 10% by volume is preferably 345 ° C. or higher, more preferably 348 ° C. or higher, still more preferably 350 ° C. or higher, still more preferably 352 ° C. or higher. Further, the temperature may be 353 ° C or higher, 355 ° C or higher, 357 ° C or higher, or 360 ° C or higher.
  • the temperature at which the distillate amount of the light distillate is 10% by volume is not particularly limited to an upper limit, but is 600 ° C. or lower, 550 ° C. or lower, 500 ° C. or lower, 430 ° C. or lower, 420 ° C. or lower, or 400 ° C. or lower. It may be.
  • the "temperature at which the amount of the distillate of the light distillate becomes 10% by volume” is based on ASTM D6352, and is light in the process of raising the temperature from room temperature by the gas chromatograph method distillation test. The distillate amount of the distillate is measured, and it means the temperature when the distillate amount reaches 10% by volume.
  • the viscosity index of the mineral oil (A) used in one aspect of the present invention is preferably 70 or more, more preferably 80 or more, still more preferably 90 or more, still more preferably, from the viewpoint of making a lubricating oil composition having a small temperature dependence. Is 100 or more, particularly preferably 110 or more.
  • the aniline point of the mineral oil (A) used in one aspect of the present invention is preferably 100 to 140 ° C, more preferably 108 to 130 ° C, and even more preferably 110 to 125 ° C.
  • the aniline point means a value measured in accordance with JIS K2256 (U-shaped tube method).
  • the flash point of the mineral oil (A) used in one aspect of the present invention is preferably 180 ° C. or higher, more preferably 192 ° C. or higher, further preferably 194 ° C. or higher, and preferably 400 ° C. or lower, more preferably 350 ° C. or higher. ° C. or lower, more preferably 300 ° C. or lower.
  • the flash point means a value measured by the Cleveland opening method (COC) method in accordance with JIS K2265-4.
  • the pour point of the mineral oil (A) used in one embodiment of the present invention is preferably ⁇ 20 ° C. or lower, more preferably ⁇ 30 ° C. or lower, still more preferably less than ⁇ 35 ° C., and even more preferably ⁇ 37.5 ° C. or lower. be.
  • the pour point means a value measured in accordance with JIS K2269: 1987.
  • the mixed mineral oil (A) used in one aspect of the present invention is a mixed mineral oil in which two or more kinds of mineral oils are mixed
  • the mixed mineral oil may satisfy the above requirements (a1) to (a5), and the viscosity index, The aniline point, the ignition point, and the pour point may belong to the above-mentioned preferable range. Further, if each of the mineral oils constituting the mixed mineral oil satisfies the above requirements (a1) to (a5), it can be considered that the mixed mineral oil also satisfies these requirements. The same applies to the viscosity index, aniline point, flash point, and pour point.
  • the mineral oil (A) is a low-viscosity mineral oil ( ⁇ ) having a kinematic viscosity of less than 3.0 mm 2 / s at 100 ° C. and 100 ° C. It may be a mixed mineral oil with a high-viscosity mineral oil ( ⁇ ) having a kinematic viscosity of 3.0 mm 2 / s or more.
  • the blending ratio [( ⁇ ) / ( ⁇ )] of the low-viscosity mineral oil ( ⁇ ) and the high-viscosity mineral oil ( ⁇ ) is the mixed mineral oil ( ⁇ ) and ( ⁇ ).
  • the above requirements (a1) to (a5) may be appropriately set according to the kinematic viscosity.
  • the specific compounding ratio of low-viscosity mineral oil ( ⁇ ) and high-viscosity mineral oil ( ⁇ ) [( ⁇ ) / ( ⁇ )] is preferably 10/90 to 99/1, more preferably 30 in terms of mass ratio. It is / 70 to 95/5, more preferably 50/50 to 90/10, even more preferably 55/45 to 85/15, and particularly preferably 60/40 to 80/20.
  • the content of the mineral oil (A) is preferably 40 to 99.5% by mass, more preferably 50, based on the total amount (100% by mass) of the lubricating oil composition. It is -99.0% by mass, more preferably 60-98.0% by mass, still more preferably 70-96.0% by mass, and particularly preferably 80-95.0% by mass.
  • the lubricating oil composition of one aspect of the present invention may contain a synthetic oil together with the mineral oil (A) as long as the effects of the present invention are not impaired.
  • the synthetic oil include poly such as an ⁇ -olefin homopolymer or an ⁇ -olefin copolymer (for example, an ⁇ -olefin copolymer having 8 to 14 carbon atoms such as an ethylene- ⁇ -olefin copolymer).
  • Examples thereof include ⁇ -olefins; isoparaffins; polyalkylene glycols; polyol esters, dibasic acid esters, phosphate esters and other ester oils; ether oils such as polyphenyl ethers; alkylbenzene; alkylnaphthalene; and the like. These synthetic oils may be used alone or in combination of two or more.
  • the kinematic viscosity at 100 ° C. of synthetic oils that may be used in one aspect of the present invention may be a comparable mineral oil (A), preferably 2.00 mm 2 / s or more 3.10mm less than 2 / s, more preferably It is 2.10 mm 2 / s or more 3.05mm less than 2 / s, more preferably 2.20 mm 2 / s or more 3.00mm less than 2 / s, even more preferably 2.30 mm 2 / s or more 2.98 mm 2 / Less than s, particularly preferably 2.40 mm 2 / s or more and less than 2.97 mm 2 / s.
  • A comparable mineral oil
  • the viscosity index of the synthetic oil that can be used in one aspect of the present invention is preferably 70 or more, more preferably 80 or more, still more preferably 90 or more, still more preferably 100 or more, and particularly preferably 110 or more.
  • the kinematic viscosity and the viscosity index of the mixed synthetic oil are preferably in the above ranges.
  • the content of the synthetic oil is preferably 0 to 50 parts by mass, more preferably 0 to 50 parts by mass, based on 100 parts by mass of the total amount of the mineral oil (A) contained in the lubricating oil composition. Is 0 to 30 parts by mass, more preferably 0 to 10 parts by mass, still more preferably 0 to 5 parts by mass, and particularly preferably 0 to 1 part by mass.
  • the lubricating oil composition of the present invention contains imide succinimide (B). By containing imide (B) succinimide, it is possible to obtain a lubricating oil composition having excellent fuel efficiency and hydraulic properties.
  • the content of imide (B) succinimide (B) in terms of nitrogen atom is 0.008 to 0.060 mass based on the total amount (100% by mass) of the lubricating oil composition. It is adjusted to%. By adjusting the content of the component (B) in terms of nitrogen atoms to this range in this way, it is possible to obtain a lubricating oil composition having good fuel efficiency while improving the hydraulic characteristics.
  • the content of imide succinate (B) in terms of nitrogen atom is 0.008% by mass or more based on the total amount (100% by mass) of the lubricating oil composition.
  • it is preferably 0.015% by mass or more, more preferably 0.020% by mass or more, still more preferably 0.025% by mass or more, still more.
  • It is preferably 0.030% by mass or more, particularly preferably 0.035% by mass or more, and may be 0.037% by mass or more, 0.040% by mass or more, or 0.042% by mass or more.
  • the content of imide succinate (B) in terms of nitrogen atom is 0.060% by mass or less based on the total amount (100% by mass) of the lubricating oil composition, but the fuel saving property is further improved.
  • a lubricating oil composition preferably 0.057% by mass or less, more preferably 0.055% by mass or less, still more preferably 0.052% by mass or less, still more preferably 0.050% by mass or less.
  • it is 0.048% by mass or less, and further, it may be 0.047% by mass or less, 0.046% by mass or less, or 0.045% by mass or less.
  • the content of imide succinate (B) in terms of nitrogen atom is preferably 0.015 to 0.057% by mass, more preferably 0.%, based on the total amount (100% by mass) of the lubricating oil composition. It is 020 to 0.055% by mass, more preferably 0.025 to 0.052% by mass, still more preferably 0.030 to 0.050% by mass, and particularly preferably 0.035 to 0.048% by mass.
  • the content of a nitrogen atom means a value measured according to JIS K2609.
  • the blending amount (content) of imide succinate (B) may be adjusted so that the content in terms of nitrogen atom belongs to the above range. Based on the total amount (100% by mass) of the lubricating oil composition, it is preferably 0.01 to 15.0% by mass, more preferably 0.1 to 12.0% by mass, and further preferably 0.5 to 10.0. It is mass%, more preferably 1.0 to 7.0 mass%.
  • the succinate imide (B) used in one aspect of the present invention may be monoimide succinate, bisimide succinate, or a combination thereof.
  • the monoimide succinate is preferably monoimide succinate represented by the following general formula (b-1), and the bisimide succinate is preferably bisimide alkenyl succinate represented by the following general formula (b-2).
  • the succinimide (B) may be used alone or in combination of two or more.
  • RA , RA1 and RA2 are independently alkenyls having a weight average molecular weight (Mw) of 500 to 3000 (preferably 1000 to 3000). Is the basis.
  • alkenyl group include a polybutenyl group, a polyisobutenyl group, an ethylene-propylene copolymer and the like, and a polybutenyl group or a polyisobutenyl group is preferable.
  • R B, R B1 and R B2 are each independently an alkylene group having 2 to 5 carbon atoms.
  • RC and RC1 are independent hydrogen atoms, alkyl groups having 1 to 10 carbon atoms, or groups represented by-(AO) n- H (however, A is an independent group having 1 to 10 carbon atoms, respectively). It is an alkylene group of 2 to 4 and n is an integer of 1 to 10).
  • x1 is an integer of 1 to 10, preferably an integer of 2 to 5, and more preferably 3 or 4.
  • x2 is an integer of 0 to 10, preferably an integer of 1 to 5, and more preferably an integer of 2 to 4.
  • the succinimide (B) used in one aspect of the present invention may be a non-modified succinimide or a modified succinimide.
  • the modified succinimide include a boron compound, an alcohol, an aldehyde, a ketone, an alkylphenol, a cyclic carbonate, and an epoxy compound in addition to the non-modified alkenyl succinimide represented by the general formula (b-1) or (b-2). And modified alkenyl succinimide reacted with one or more selected from organic acids and the like.
  • the succinimide (B) used in one aspect of the present invention may contain a non-modified succinimide from the viewpoint of obtaining a lubricating oil composition having better fuel efficiency while further improving hydraulic properties. It is more preferable to contain the non-modified bisimide succinate (B1), and further preferably to contain the non-modified alkenyl succinimide (B11) represented by the general formula (b-2). From the above viewpoint, the content ratio of the component (B1) (or the component (B11)) in the succinimide (B) used in one aspect of the present invention is the total amount of the component (B) contained in the lubricating oil composition. With respect to 100% by mass, preferably 50 to 100% by mass, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, and particularly preferably 95 to 100% by mass. %.
  • the content of boron-modified succinimide is small in the lubricating oil composition of one aspect of the present invention. Is more preferable.
  • the specific content of boron-modified succinate imide is preferably 0 to 30 parts by mass, more preferably 0 to 10 parts by mass with respect to 100 parts by mass of the total amount of the component (B) contained in the lubricating oil composition. It is by mass, more preferably 0 to 5 parts by mass, even more preferably 0 to 1 part by mass, and particularly preferably 0 to 0.1 parts by mass.
  • the lubricating oil composition of one aspect of the present invention may contain an ashless dispersant other than the component (B) as long as the effects of the present invention are not impaired.
  • ashless dispersants include benzylamine, succinic acid ester, and modified products such as boron thereof.
  • the content of the other ashless dispersant is preferably 0 with respect to 100 parts by mass of the total amount of the component (B) contained in the lubricating oil composition. It is ⁇ 50 parts by mass, more preferably 0 to 30 parts by mass, further preferably 0 to 10 parts by mass, still more preferably 0 to 5 parts by mass, and particularly preferably 0 to 1 part by mass.
  • the lubricating oil composition of the present invention contains a polymer (C).
  • a lubricating oil composition having improved hydraulic properties and fuel efficiency can be obtained in a well-balanced manner.
  • in the lubricating oil composition of the present invention in terms of the resin content of the polymer (C).
  • the content of the lubricating oil composition is adjusted to 0.40 to 3.00% by mass based on the total amount of the lubricating oil composition.
  • the content of the polymer (C) in terms of resin content is 0.40% by mass or more based on the total amount (100% by mass) of the lubricating oil composition. From the viewpoint of obtaining a lubricating oil composition having improved hydraulic properties and fuel saving in a well-balanced manner, it is preferably 0.45% by mass or more, more preferably 0.48% by mass or more, still more preferably 0.50% by mass. The above is even more preferably 0.52% by mass or more, particularly preferably 0.55% by mass or more, and further 0.57% by mass or more, 0.60% by mass or more, 0.62% by mass or more, 0.
  • the content of the polymer (C) in terms of resin content is 3.00% by mass or less based on the total amount (100% by mass) of the lubricating oil composition, but the balance between hydraulic characteristics and fuel saving is balanced. From the viewpoint of making a lubricating oil composition that can improve the quality and suppress the formation of deposits, it is preferably 2.50% by mass or less, more preferably 2.20% by mass or less, still more preferably 2.00% by mass or less.
  • the content of the polymer (C) in terms of resin content is preferably 0.45 to 2.50% by mass, more preferably 0.48 to 2.50% by mass, based on the total amount (100% by mass) of the lubricating oil composition. It is 2.20% by mass, more preferably 0.50 to 2.00% by mass, still more preferably 0.52 to 1.70% by mass, and particularly preferably 0.55 to 1.55% by mass.
  • the polymer (C) is often marketed in the form of a solution dissolved in a diluted oil.
  • the content of the polymer (C) is the content converted into the resin content constituting the polymer (C) in the solution diluted with the diluted oil, excluding the mass of the diluted oil. ..
  • the content of imide succinate (B) in terms of nitrogen atom (B) from the viewpoint of obtaining a lubricating oil composition in which hydraulic properties and fuel saving properties are both improved.
  • the ratio [(B) / (C)] of the unit: mass%) to the content of the polymer (C) in terms of resin content (unit: mass%) is preferably 0.001 to 5.00. It is preferably 0.005 to 3.00, more preferably 0.010 to 1.00, still more preferably 0.015 to 0.15, and particularly preferably 0.020 to 0.10.
  • the ratio of the content of imide succinate (B) in terms of nitrogen atom (unit: mass%) to the content of polymer (C) in terms of resin content (unit: mass%) [(B) / (C)] may be further set to 0.025 or more, 0.030 or more, 0.035 or more, 0.040 or more, 0.045 or more, 0.050 or more, or 0.055 or more, and 0. It may be 0.095 or less, 0.090 or less, 0.085 or less, 0.080 or less, 0.075 or less, 0.070 or less, or 0.065 or less.
  • Examples of the polymer (C) used in one embodiment of the present invention include non-dispersive polymethacrylate, dispersed polymethacrylate, olefin-based copolymer (for example, ethylene-propylene copolymer, etc.), and dispersed olefin-based copolymer. Examples thereof include coalescing and styrene-based copolymers (for example, styrene-diene copolymers, styrene-isoprene copolymers, etc.). Further, the polymer (C) is not limited to a linear polymer, but may be a branched chain polymer, a comb-shaped polymer, a star-shaped polymer, or the like.
  • polymers (C) may be used alone or in combination of two or more.
  • the polymer (C) used in one aspect of the present invention includes not only a polymer used as a so-called viscosity index improver but also a polymer used as a pour point lowering agent.
  • the weight average molecular weight (Mw) of the polymer (C) used in one embodiment of the present invention is usually 500 to 1,000,000, preferably 1,000 to 1,000,000, and more preferably 3,000 to 1. Although it is 0,000,000, it is appropriately set depending on the type of polymer.
  • the polymer (C) used in one embodiment of the present invention has excellent viscosity characteristics regardless of the temperature region while further improving the hydraulic characteristics, and lubrication capable of exhibiting fuel efficiency independent of the temperature region. From the viewpoint of making an oil composition, it is preferable to contain a comb-shaped polymer (C1).
  • the comb-shaped polymer (C1) has a function as a so-called viscosity index improver.
  • the comb-shaped polymer (C1) used in one embodiment of the present invention may be a polymer having a structure having a large number of three-pronged branch points in the main chain where high molecular weight side chains are present.
  • the content ratio of the comb-shaped polymer component (C1) in the polymer (C) used in one aspect of the present invention is based on 100% by mass of the total amount of the component (C) contained in the lubricating oil composition. It is preferably 50 to 100% by mass, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, and particularly preferably 95 to 100% by mass.
  • the weight average molecular weight (Mw) of the comb-shaped polymer (C1) used in one embodiment of the present invention is preferably 200,000 to 1,000,000, more preferably 300,000 to 900,000, still more preferably 400,000 to 800,000. It is preferably 450,000 to 700,000, particularly preferably 500,000 to 650,000.
  • the molecular weight distribution (Mw / Mn) of the comb polymer (C1) used in one embodiment of the present invention is preferably 4.0 or less, more preferably 3. It is 5.5 or less, more preferably 3.0 or less, still more preferably 2.7 or less, particularly preferably 2.5 or less, and preferably 1.01 or more, more preferably 1.05 or more, still more preferable. Is 1.1 or more, more preferably 1.2 or more, and particularly preferably 1.5 or more.
  • the molecular weight distribution (Mw / Mn) of the comb-shaped polymer (C1) is preferably 1.01 to 4.0, more preferably 1.05 to 3.5, still more preferably 1.1 to 3.0, and more. It is more preferably 1.2 to 2.7, and particularly preferably 1.5 to 2.5.
  • the comb-shaped polymer (C1) used as the component (C) in one aspect of the present invention is preferably a polymer having at least a structural unit (X1) derived from the macromonomer (x1).
  • This structural unit (X1) corresponds to the above-mentioned "high molecular weight side chain".
  • the above-mentioned "macromonomer (x1)” means a high molecular weight monomer having a polymerizable functional group, and is preferably a high molecular weight monomer having a polymerizable functional group at the terminal.
  • the content of the constituent unit (X1) is preferably 0.5 to 20 mol based on the total amount (100 mol%) of the constituent units of the comb polymer (C1). %, More preferably 0.7 to 10 mol%, still more preferably 0.9 to 5 mol%.
  • the number average molecular weight (Mn) of the macromonomer (x1) is preferably 300 or more, more preferably 400 or more, still more preferably 500 or more, and preferably 20,000 or less, more preferably 10,000 or less. , More preferably 5,000 or less. That is, the number average molecular weight (Mn) of the macromonomer (x1) is preferably 300 to 20,000, more preferably 400 to 10,000, and even more preferably 500 to 5,000.
  • the weight average molecular weight (Mw) of the macromonomer (x1) is preferably 1,000 or more, more preferably 2,000 or more, still more preferably 4,000 or more, and preferably 50,000 or less. , More preferably 25,000 or less, still more preferably 10,000 or less. That is, the weight average molecular weight (Mw) of the macromonomer (x1) is preferably 1,000 to 50,000, more preferably 2000 to 25,000, and even more preferably 4,000 to 10,000.
  • the macromonomer (x1) may have, for example, one or more repeating units represented by the following general formulas (i) to (iii) in addition to the above-mentioned polymerizable functional group.
  • R b1 is a linear or branched alkylene group having 1 to 10 carbon atoms.
  • R b2 is a linear or branched alkylene group having 2 to 4 carbon atoms.
  • R b3 is a hydrogen atom or a methyl group.
  • R b4 is a linear or branched alkyl group having 1 to 10 carbon atoms.
  • the macromonomer (x1) is preferably a polymer having a repeating unit represented by the general formula (i), and R b1 in the general formula (i) is 1,2. More preferably, it is a polymer having a repeating unit (X1-1) which is at least one of a-butylene group and a 1,4-butylene group.
  • the content of the repeating unit (X1-1) is preferably 1 to 100 mol%, more preferably 20 to 95 mol%, still more preferably, based on the total amount (100 mol%) of the constituent units of the macromonomer (x1). Is 40 to 90 mol%, more preferably 50 to 80 mol%.
  • the macromonomer (x1) is a copolymer having two or more repeating units selected from the general formulas (i) to (iii)
  • the form of copolymerization is a block copolymer. It may be a random copolymer or a random copolymer.
  • the comb-shaped polymer (C1) used in one embodiment of the present invention may be a homopolymer consisting of only a structural unit (X1) derived from one type of macromonomer (x1), or is derived from two or more types of macromonomers (x1). It may be a copolymer having a structural unit (X1). Further, the comb-shaped polymer (C1) used in one embodiment of the present invention contains a structural unit (X1) derived from a macromonomer (x1) and a structural unit (X2) derived from a monomer other than the macromonomer (x1). It may be a copolymer having.
  • a side chain containing a structural unit (X1) derived from a macromonomer (x1) is used as opposed to a main chain containing a structural unit (X2) derived from a monomer (x2).
  • a copolymer having the above is preferable.
  • Examples of the monomer (x2) include alkyl (meth) acrylate, nitrogen atom-containing vinyl monomer, hydroxyl group-containing vinyl monomer, phosphorus atom-containing monomer, aliphatic hydrocarbon-based vinyl monomer, and alicyclic type.
  • Hydrocarbon-based vinyl monomers, vinyl esters, vinyl ethers, vinyl ketones, epoxy group-containing vinyl monomers, halogen element-containing vinyl monomers, unsaturated polycarboxylic acid esters, (di) alkyl fumarate, ( D) Alkyl maleate, aromatic hydrocarbon-based vinyl monomer and the like can be mentioned.
  • the monomer (x2) a monomer other than the phosphorus atom-containing monomer and the aromatic hydrocarbon-based vinyl monomer is preferable, and the monomer represented by the following general formula (a1), alkyl (meth). ) It is more preferable to contain at least one selected from acrylate and a hydroxyl group-containing vinyl monomer, and further preferably to contain at least a hydroxyl group-containing vinyl monomer (x2-d).
  • R b11 is a hydrogen atom or a methyl group.
  • R b12 is a single bond, linear or branched alkylene group having 1 to 10 carbon atoms, -O-, or -NH-.
  • R b13 is a linear or branched alkylene group having 2 to 4 carbon atoms.
  • n represents an integer of 1 or more (preferably an integer of 1 to 20, more preferably an integer of 1 to 5).
  • the plurality of R b13s may be the same or different, and the (R b13 O) n portion may be a random bond or a block bond.
  • R b14 is a linear or branched alkyl group having 1 to 60 carbon atoms (preferably 10 to 50, more preferably 20 to 40).
  • the SSI (shear stability index) of the comb polymer (C1) used in one aspect of the present invention is preferably 100 or less, more preferably 80 or less, still more preferably 70 or less, still more preferably 60 or less, and particularly preferably. It is 50 or less.
  • the SSI of the comb polymer (C1) is usually 0.1 or more, although there is no particular limitation on the lower limit.
  • the SSI shear stability index
  • SSI (%) (Kv 0 -Kv 1 ) / (Kv 0- Kv oil ) x 100
  • Kv 0 is the value of the kinematic viscosity of the sample oil obtained by diluting the polymer component with mineral oil at 100 ° C.
  • Kv 1 is the value of the sample oil obtained by diluting the polymer component with mineral oil. It is a value of kinematic viscosity at 100 ° C. after irradiation with ultrasonic waves for 30 minutes according to the output method according to the procedure of 5S-29-06.
  • Kv oil is a value of the kinematic viscosity of the mineral oil used when diluting the polymer component at 100 ° C.
  • the SSI value of the comb polymer (C1) changes depending on the structure of the comb polymer. Specifically, there is a tendency shown below, and the SSI value of the comb polymer (C1) can be easily adjusted by considering these matters.
  • the following items are merely examples and can be adjusted by considering items other than these items.
  • -The side chain of the comb-shaped polymer is composed of macromonomer (x1), and the content of the structural unit (X1) derived from the macromonomer (x1) is 0.5 based on the total amount (100 mol%) of the structural unit.
  • Comb-shaped polymers having a molar% or more tend to have a low SSI value.
  • the larger the molecular weight of the macromonomer (x1) constituting the side chain of the comb-shaped polymer the lower the SSI value tends to be.
  • the lubricating oil composition according to one aspect of the present invention preferably further contains a friction modifier (D) from the viewpoint of further improving fuel efficiency.
  • friction modifiers (D) may be used alone or in combination of two or more.
  • the friction modifier (D) used in one embodiment of the present invention preferably contains at least one selected from molybdenum dithiocarbamate (MoDTC) and molybdenum dithiophosphate (MoDTP), and molybdenum dithiocarbamate (MoDTC). It is more preferable to include.
  • the content of the friction modifier (D) in terms of molybdenum atom is preferably 0.010% by mass based on the total amount (100% by mass) of the lubricating oil composition.
  • the above is more preferably 0.050% by mass or more, further preferably 0.080% by mass or more, still more preferably 0.090% by mass or more, and preferably 0.200% by mass or less, more preferably 0. .180% by mass or less, more preferably 0.160% by mass or less, still more preferably 0.140% by mass or less.
  • the content of the friction modifier (D) in terms of molybdenum atom is preferably 0.010 to 0.200% by mass, more preferably 0.%, based on the total amount (100% by mass) of the lubricating oil composition. It is 050 to 0.180% by mass, more preferably 0.080 to 0.160% by mass, and even more preferably 0.090 to 0.140% by mass.
  • the content of molybdenum atom means a value measured according to JPI-5S-38-2003.
  • the lubricating oil composition of one aspect of the present invention may further contain additives for lubricating oil other than the components (B) to (D), if necessary, as long as the effects of the present invention are not impaired.
  • additives for lubricating oil include an abrasion resistant agent, an extreme pressure agent, a metal-based cleaning agent, an antioxidant, a metal inactivating agent, a rust preventive agent, a defoaming agent and the like.
  • additives for lubricating oil may be used alone or in combination of two or more.
  • each of these additives for lubricating oil can be appropriately adjusted within a range that does not impair the effects of the present invention, but each addition is based on the total amount (100% by mass) of the lubricating oil composition. Independently for each agent, it is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, and more preferably 0.01 to 5% by mass.
  • a commercially available additive package containing a plurality of additives conforming to the API / ILSAC SN / GF-5 standard or the like may be used.
  • a compound having a plurality of functions as the above-mentioned additives for example, a compound having a function as an abrasion resistant agent and an extreme pressure agent may be used.
  • abrasion resistant agent examples include zinc dialkyldithiophosphate (ZnDTP), zinc phosphate, zinc dithiocarbamate, molybdenum dithiocarbamate, molybdenum dithiophosphate, disulfides, olefin sulfides, fats and oils sulfide.
  • Sulfur-containing compounds such as sulfide esters, thiocarbonates, thiocarbamates, polysulfides; phosphorus-containing compounds such as phosphite esters, phosphoric acid esters, phosphonic acid esters, and amine salts or metal salts thereof; Examples thereof include thioaroic acid esters, thiophosphate esters, thiophosphonic acid esters, and sulfur and phosphorus-containing abrasion resistant agents such as amine salts or metal salts thereof.
  • zinc dialkyldithiophosphate (ZnDTP) is preferable.
  • Examples of the extreme pressure agent used in one aspect of the present invention include sulfur-based extreme pressure agents such as sulfides, sulfoxides, sulfones, and thiophosphinates, halogen-based extreme pressure agents such as chlorinated hydrocarbons, and organic metals. Examples include system extreme pressure agents. Further, among the above-mentioned wear resistant agents, a compound having a function as an extreme pressure agent can also be used.
  • Metal-based cleaning agent examples of the metal-based cleaning agent used in one embodiment of the present invention include organic acid metal salt compounds containing metal atoms selected from alkali metals and alkaline earth metals, and specific examples thereof include alkali metals and alkaline earth. Examples thereof include metal salicylates, metal phenates, and metal sulfonates containing metal atoms selected from similar metals. As the metal atom contained in the metal-based cleaning agent, sodium, calcium, magnesium, or barium is preferable, and calcium is more preferable, from the viewpoint of improving the cleanliness at high temperature.
  • the metal sulfonate is preferably a compound represented by the following general formula (1)
  • the metal salicylate is preferably a compound represented by the following general formula (2)
  • the metal phenate is generally described below.
  • the compound represented by the formula (3) is preferable.
  • M is a metal atom selected from alkali metals and alkaline earth metals, and sodium, calcium, magnesium, or barium is preferable, and calcium is more preferable.
  • M' is an alkaline earth metal, preferably calcium, magnesium, or barium, and more preferably calcium.
  • y is an integer of 0 or more, preferably an integer of 0 to 3.
  • p is a valence of M and is 1 or 2.
  • R is a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms.
  • Examples of the hydrocarbon group that can be selected as R include an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 18 ring-forming carbon atoms, and 6 to 18 ring-forming carbon atoms. Examples thereof include an aryl group of 7 to 18, an alkylaryl group having 7 to 18 carbon atoms, and an arylalkyl group having 7 to 18 carbon atoms.
  • the metal-based cleaning agent may be any of a neutral salt, a basic salt, a hyperbasic salt, and a mixture thereof.
  • the total base value of the metal-based cleaning agent is preferably 0 to 600 mgKOH / g.
  • the total base value of the metal-based cleaning agent is preferably 10 to 600 mgKOH / g, more preferably. Is 20-500 mgKOH / g.
  • base value refers to JIS K2501 "Petroleum products and lubricating oil-neutralization value test method”. It means the base value by the perchloric acid method measured according to.
  • antioxidant used in one aspect of the present invention, any known antioxidant that has been conventionally used as an antioxidant for lubricating oils can be appropriately selected and used.
  • amine examples thereof include based antioxidants, phenolic antioxidants, molybdenum-based antioxidants, sulfur-based antioxidants, phosphorus-based antioxidants and the like.
  • amine-based antioxidant examples include diphenylamine and diphenylamine-based antioxidants such as alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms; ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, and alkyl having 3 to 20 carbon atoms.
  • examples include naphthylamine-based antioxidants having a group such as substituted phenyl- ⁇ -naphthylamine; and the like.
  • phenolic antioxidant examples include 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, and the like.
  • Monophenolic antioxidants such as isooctyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate and octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate Agents; diphenolic antioxidants such as 4,4'-methylenebis (2,6-di-tert-butylphenol), 2,2'-methylenebis (4-ethyl-6-tert-butylphenol); hinderedphenols Antioxidants; etc.
  • Examples of the molybdenum-based antioxidant include a molybdenum amine complex formed by reacting molybdenum trioxide and / or molybdic acid with an amine compound.
  • Examples of the sulfur-based antioxidant include dilauryl-3,3'-thiodipropionate and the like.
  • Examples of the phosphorus-based antioxidant include phosphite and the like.
  • Metal inactivating agent examples include benzotriazole-based compounds, tolyltriazole-based compounds, thiadiazole-based compounds, imidazole-based compounds, pyrimidine-based compounds and the like.
  • rust preventive agent examples include fatty acids, alkenyl succinic acid half esters, fatty acid stakes, alkyl sulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, oxidized paraffins, alkyl polyoxyethylene ethers and the like. Can be mentioned.
  • Examples of the defoaming agent used in one aspect of the present invention include silicone oil, fluorosilicone oil, fluoroalkyl ether and the like.
  • the method for producing the lubricating oil composition according to one aspect of the present invention is not particularly limited, but from the viewpoint of productivity, mineral oil (A), imide succinate (B) and polymer (C), and if necessary. Therefore, it is preferable that the method comprises a step of blending a synthetic oil, an ashless dispersant other than imide (B) succinate, and the above-mentioned other additives for lubricating oil.
  • the resin component such as the polymer (C) is preferably in the form of a solution dissolved in the diluted oil, and the solution is preferably blended with the mineral oil (A).
  • Kinematic viscosity at 100 ° C. for one embodiment of the lubricating oil composition of the present invention is preferably less than 5.1 mm 2 / s, more preferably 3.0 ⁇ 5.0mm 2 / s, more preferably from 3.2 to 4 It is 8.8 mm 2 / s, more preferably 3.5 to 4.6 mm 2 / s, and particularly preferably 3.7 to 4.5 mm 2 / s.
  • the kinematic viscosity of the lubricating oil composition of one aspect of the present invention at 40 ° C. is preferably 5.0 to 60.0 mm 2 / s, more preferably 6.0 to 50.0 mm 2 / s, still more preferably 7. It is 0 to 40.0 mm 2 / s, more preferably 8.0 to 30.0 mm 2 / s, and particularly preferably 10.0 to 25.0 mm 2 / s.
  • the viscosity index of the lubricating oil composition according to one aspect of the present invention is preferably 100 or more, more preferably 120 or more, still more preferably 140 or more, still more preferably 160 or more, and particularly preferably 180 or more.
  • the lubricating oil composition according to one aspect of the present invention can maintain a constant viscosity so that excellent hydraulic properties can be exhibited in a temperature range under a wide high temperature range.
  • the kinematic viscosity of the lubricating oil composition of one aspect of the present invention at 140 ° C. is preferably 2.45 mm 2 / s or more, more preferably 2.46 to 4.40 m 2 / s, still more preferably 2.48. ⁇ 4.20m 2 / s, even more preferably 2.50 ⁇ 4.00m 2 / s, particularly preferably 2.55 ⁇ 3.80m 2 / s.
  • the lubricating oil composition has excellent hydraulic characteristics when the engine is used.
  • Kinematic viscosity at 110 ° C. for one embodiment of the lubricating oil composition of the present invention is preferably 2.8 ⁇ 5.0mm 2 / s, more preferably 3.0 ⁇ 4.8mm 2 / s, more preferably 3. 2 ⁇ 4.6mm 2 / s, even more preferably 3.3 ⁇ 4.5mm 2 / s, particularly preferably 3.5 ⁇ 4.4mm 2 / s.
  • Kinematic viscosity at 120 ° C. for one embodiment of the lubricating oil composition of the present invention is preferably 2.7 ⁇ 4.8mm 2 / s, more preferably 2.9 ⁇ 4.6mm 2 / s, more preferably 3. It is 0 to 4.4 mm 2 / s, more preferably 3.1 to 4.2 mm 2 / s, and particularly preferably 3.2 to 4.0 mm 2 / s.
  • Kinematic viscosity at 130 ° C. for one embodiment of the lubricating oil composition of the present invention is preferably 2.5 ⁇ 4.6 mm 2 / s, more preferably 2.6 ⁇ 4.5 mm 2 / s, more preferably 2. 7 ⁇ 4.3mm 2 / s, even more preferably 2.75 ⁇ 4.1mm 2 / s, particularly preferably 2.8 ⁇ 3.9mm 2 / s.
  • the kinematic viscosity of the lubricating oil composition of one aspect of the present invention at 150 ° C. is preferably 2.00 to 4.00 mm 2 / s, more preferably 2.05 to 3.80 mm 2 / s, and even more preferably 2. It is 10 to 3.60 mm 2 / s, more preferably 2.15 to 3.40 mm 2 / s, and particularly preferably 2.20 to 3.20 mm 2 / s.
  • the lubricating oil composition according to one aspect of the present invention can exhibit excellent fuel efficiency in a temperature range under a wide high temperature range.
  • fuel efficiency in a low temperature region can be evaluated by the HTHS viscosity at 80 ° C.
  • the HTHS viscosity of the lubricating oil composition according to one aspect of the present invention at 80 ° C. is preferably 4.40 mPa ⁇ s or less, more preferably 2.40 to 4.35 mPa ⁇ s, still more preferably 2.50. It is ⁇ 4.32 mPa ⁇ s, more preferably 2.60 ⁇ 4.30 mPa ⁇ s.
  • the HTHS viscosity of the lubricating oil composition of one aspect of the present invention at 100 ° C. is preferably 2.00 to 4.00 mPa ⁇ s, more preferably 2.10 to 3.90 mPa ⁇ s, and even more preferably 2.20 to 2.20 mPa ⁇ s. It is 3.80 mPa ⁇ s, more preferably 2.40 to 3.60 mPa ⁇ s.
  • the HTHS viscosity of the lubricating oil composition of one aspect of the present invention at 150 ° C. is preferably 1.40 mPa ⁇ s or more, more preferably 1.45 to 3.80 mPa ⁇ s, still more preferably 1.50 to 3.60 mPa. ⁇ S, even more preferably 1.55 to 3.40 mPa ⁇ s.
  • HTHS viscosity at each temperature, conforming to ASTM D 4741, at each measurement temperature means a value of the viscosity measured after shear at a shear rate of 10 6 / s.
  • the SAE viscosity grade of the lubricating oil composition according to one aspect of the present invention is preferably 0W-4 or 0W-8, and more preferably 0W-4.
  • various performances can be sufficiently exhibited when applied to lubrication of an engine mounted on a hybrid car or a generator, for example.
  • the NOACK value of the lubricating oil composition according to one aspect of the present invention is preferably 32% by mass or less, more preferably 31% by mass or less, still more preferably 30.5% by mass or less.
  • NOACK value is 32% by mass or less, it can be said that the lubricating oil composition is excellent in oil consumption suppressing property because oil consumption due to evaporation is suppressed.
  • the content of molybdenum atom is preferably 0.010% by mass or more, more preferably 0.050% by mass, based on the total amount (100% by mass) of the lubricating oil composition.
  • the content of the molybdenum atom is preferably 0.010 to 0.200% by mass, more preferably 0.050 to 0.180% by mass, based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 0.080 to 0.160% by mass, and even more preferably 0.090 to 0.140% by mass.
  • the lubricating oil composition according to one aspect of the present invention is excellent in characteristics such as hydraulic properties, fuel efficiency, and oil consumption suppression properties. Therefore, the lubricating oil composition of one aspect of the present invention can be suitably applied to the engine for lubrication, and in particular, by lubricating the engine mounted on the engine mounted on the hybrid car or the generator mounted on the electric vehicle. It can be suitably applied, and can be more preferably applied to lubrication of an engine mounted on a range extender for an electric vehicle.
  • the present invention describes the engine according to the following [1] and [2], and the lubrication according to the following [3] and [4].
  • Methods of using the oil composition may also be provided.
  • a method for using a lubricating oil composition wherein the lubricating oil composition according to one aspect of the present invention is applied to lubricate an engine mounted on an engine of a hybrid car or a generator for an electric vehicle.
  • a method for using a lubricating oil composition which applies the above-mentioned lubricating oil composition of one aspect of the present invention to lubricate an engine mounted on a range extender for an electric vehicle.
  • the fuel for the engines [1] to [4] above is not particularly limited, and examples thereof include gas, gasoline, and biomethanol.
  • a parallel type (parallel type) engine in which both an internal combustion engine and an electric motor are used as drive sources of the vehicle and a split type (power split type) engine.
  • the hybrid car may be an electrified vehicle or the like (for example, a full hybrid vehicle such as a plug-in hybrid vehicle) equipped with an internal combustion engine capable of self-propelling only by an electric motor, and the electric motor (alternator or the like) may be an internal combustion engine. It may be a mild hybrid vehicle or the like used as a driving assistance for the vehicle.
  • an engine used only for the drive source of the vehicle and used for power generation of the electric motor can be specifically mentioned.
  • an engine mounted on a range extender for an electric vehicle which assists the power generation of the electric motor of the electric vehicle.
  • the range extender in the above [2] and [4] means that the power supply is supplied when the remaining capacity of the battery is low, or when accelerating or heating operation which requires a relatively large amount of power. It refers to a mechanism that uses the engine to generate electricity when necessary, while stopping the engine when there is no need for electricity generation.
  • the lubricating oil composition of the present invention can be suitably applied to lubrication of an engine mounted on a hybrid car engine or a generator for an electric vehicle, and is particularly used for an engine mounted on a range extender for an electric vehicle. Is preferable.
  • the engine mounted on the range extender does not require as much output as a conventional gasoline engine, and repeats operation and stop in a short time.
  • the lubricating oil composition of one aspect of the present invention is excellent in characteristics such as hydraulic properties, fuel efficiency, and oil consumption suppressing property even if the viscosity is low. Therefore, it can be suitably applied to the above aspects [2] and [4].
  • the values of Kv 0 , Kv 1 , and Kv oil in the calculation formula (1) were measured and calculated from the calculation formula (1).
  • Examples 1-2, Comparative Examples 1-4 Mineral oil, succinimide, polymer and various additives were blended in the blending amounts shown in Table 2 to prepare lubricating oil compositions.
  • the polymer compounding amounts shown in Table 2 are the compounding amounts in terms of active ingredients (solid content conversion) excluding the mass of the diluted oil.
  • "property of the mineral oil” in Table 2 indicates the properties of the mixed mineral oil.
  • the details of the mineral oil, succinimide, polymer and various additives used in the preparation of each lubricating oil composition are as follows.
  • ⁇ Imide succinimide> -Non-denatured bisimide succinate: Non-denatured bisimide succinate, nitrogen atom (N) content 1.2% by mass.
  • the kinematic viscosity at each temperature the viscosity index, the HTHS viscosity at 80 ° C., 100 ° C., and 150 ° C., and the NOACK value were measured according to the above-mentioned method. These results are shown in Table 2.
  • the following motoring torque test was further conducted to calculate the drive torque improvement rate, which was used as one of the indexes for evaluation of fuel efficiency.
  • -Drive torque improvement rate (%) ([Measured value of torque measured using the lubricating oil composition of Comparative Example 1]-[Measured value of torque measured using the target lubricating oil composition]) / [ Measured value of torque measured using the lubricating oil composition of Comparative Example 1] ⁇ 100
  • the drive torque improvement calculated from the above formula is used. The rate will be positive.
  • the drive torque improvement rate calculated from the above formula becomes negative.
  • the lubricating oil composition to be measured has high fuel efficiency.
  • the value of the drive torque improvement rate is "0.50% or more”
  • it is determined that the lubricating oil composition has high fuel efficiency, but more preferably 0.55% or more, still more preferable. Is 0.60% or more, more preferably 0.70% or more.
  • the lubricating oil composition has a kinematic viscosity at 140 ° C. of 2.45 mm 2 / s or more, and has a viscosity sufficient to maintain the oil pressure in a temperature environment when the engine is used.
  • F Since the kinematic viscosity of the lubricating oil composition at 140 ° C. is less than 2.45 mm 2 / s and the viscosity in the temperature environment when the engine is used is low, the oil pressure may not be sufficiently maintained.
  • A The drive torque improvement rate at rotation speeds of 1500 rpm, 2000 rpm, and 2500 rpm at an oil temperature of 80 ° C. is 0.5% or more at all rotation speeds, and the HTHS viscosity at 80 ° C. is 4.40 mPa. It is less than or equal to s.
  • F The drive torque improvement rate at rotation speeds of 1500 rpm, 2000 rpm, and 2500 rpm at an oil temperature of 80 ° C. is less than 0.5% at at least one rotation speed, and / or the HTHS viscosity at 80 ° C. is 4.40 mPa. It is over s.
  • ⁇ Evaluation criteria for oil consumption suppression> -A It can be said that the lubricating oil composition has a NOACK value of 32% by mass or less and suppresses oil consumption due to evaporation.
  • -F The NOACK value is more than 32% by mass, the loss due to evaporation is large, and the oil consumption is not sufficiently suppressed.
  • the lubricating oil compositions prepared in Examples 1 and 2 are excellent in all of the characteristics of hydraulic characteristics, fuel efficiency, and oil consumption suppression, and the balance of these characteristics is good. rice field.
  • the lubricating oil compositions prepared in Comparative Examples 1 to 4 are inferior in at least one of hydraulic properties, fuel saving properties, and oil consumption suppressing properties, resulting in room for improvement in the balance of these properties. ..

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  • Lubricants (AREA)

Abstract

L'invention concerne une composition d'huile lubrifiante contenant : une huile minérale (A) ; du succinimide (B) ; et un polymère (C). L'huile minérale (A) satisfait les exigences de (a1) à (a3). Exigence (a1) : la viscosité cinématique à 100 °C est inférieure à 3,10 mm 2/s. Exigence (a2) : la valeur NOACK est de 36,0 % en masse ou moins. Exigence (a3) : la valeur CP, telle que mesurée conformément à ASTM D3238, est de 75,0 ou plus. La teneur du succinimide (B) est de 0,008 à 0,060 % en masse d'atome nitrogène par rapport à la quantité totale de la composition d'huile lubrifiante. La teneur du polymère (C) est de 0,40 à 3,0 % en masse de résine par rapport à la quantité totale de la composition d'huile lubrifiante.
PCT/JP2021/010164 2020-03-31 2021-03-12 Composition d'huile lubrifiante et procédé d'utilisation d'huile lubrifiante WO2021200045A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012233116A (ja) * 2011-05-06 2012-11-29 Jx Nippon Oil & Energy Corp 潤滑油組成物
WO2016159006A1 (fr) * 2015-03-31 2016-10-06 Ｊｘエネルギー株式会社 Composition d'huile lubrifiante
WO2019221296A1 (fr) * 2018-05-18 2019-11-21 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour moteurs à combustion interne
WO2020213644A1 (fr) * 2019-04-16 2020-10-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante de transmission
JP2021054878A (ja) * 2019-09-26 2021-04-08 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6420964B2 (ja) * 2014-03-31 2018-11-07 出光興産株式会社 内燃機関用潤滑油組成物
JP6572900B2 (ja) * 2014-09-19 2019-09-11 出光興産株式会社 潤滑油組成物、及び当該潤滑油組成物の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012233116A (ja) * 2011-05-06 2012-11-29 Jx Nippon Oil & Energy Corp 潤滑油組成物
WO2016159006A1 (fr) * 2015-03-31 2016-10-06 Ｊｘエネルギー株式会社 Composition d'huile lubrifiante
WO2019221296A1 (fr) * 2018-05-18 2019-11-21 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour moteurs à combustion interne
WO2020213644A1 (fr) * 2019-04-16 2020-10-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante de transmission
JP2021054878A (ja) * 2019-09-26 2021-04-08 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物

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