WO2004096958A1 - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
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- WO2004096958A1 WO2004096958A1 PCT/JP2004/006008 JP2004006008W WO2004096958A1 WO 2004096958 A1 WO2004096958 A1 WO 2004096958A1 JP 2004006008 W JP2004006008 W JP 2004006008W WO 2004096958 A1 WO2004096958 A1 WO 2004096958A1
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- mass
- lubricating oil
- oil composition
- friction coefficient
- earth metal
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Classifications
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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
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/028—Overbased salts thereof
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
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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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/086—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
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
Definitions
- the present invention relates to a lubricating oil composition, and more particularly, to a lubricating oil composition capable of increasing and maintaining the dynamic friction coefficient of a wet clutch, particularly suitable for an automatic transmission or a continuously variable transmission. is there.
- the automatic transmission is composed of a torque converter, a wet clutch, a gear bearing mechanism, and a hydraulic control mechanism for controlling these, and the speed ratio thereof is determined by the number of gear teeth engaged with each other.
- the automatic transmission has several types of gear mechanisms, and a gear for determining a speed change ratio is appropriately selected according to a vehicle speed and a load to obtain a desired speed ratio.
- Automatic transmissions have a large number of wet clutches, some of which are engaged and some of which spin to select gears that determine the transmission ratio.
- the wet clutch that had been engaged up to that point is released and another wet clutch is engaged, causing the wet clutch to have a sufficient dynamic friction coefficient to achieve quick shifting. Need to be high. In order to transmit the engine torque, the engaged wet clutch must not slip until it is released, and the coefficient of static friction must be sufficiently high.
- the size of the wet clutch, the number of sheets, and the pressing hydraulic pressure are determined according to the output of the engine to be combined. If the friction coefficient of the wet clutch is low, it is necessary to increase the clutch size, increase the number of clutches, or increase the pressing oil pressure. Increasing the size of the clutch and increasing the number of sheets lead to an increase in the size of the automatic transmission itself. Excessive load is imposed on the hydraulic pump installed in the machine. Therefore, increasing the friction coefficient of the wet clutch is effective in reducing the size of the transmission and reducing pump loss, and there is a strong demand for the development of lubricating oil that can increase the friction coefficient of the wet clutch. .
- a continuously variable transmission differs from an automatic transmission in that a wet clutch is not used for shifting, but a wet clutch is used to switch between forward and reverse, and a torque converter is combined.
- Most continuously variable transmissions have a built-in lock-up clutch that is effective in improving fuel efficiency. Therefore, in the case of continuously variable transmissions, as with automatic transmissions, the development of lubricating oils that exhibit a stable and high dynamic friction coefficient as well as a high friction coefficient for wet clutches is highly desired.
- an alcohol or a polyol having less than 12 carbon atoms in the molecule is contained, and the metal-based detergent has a metal amount of 100 mass ppm or less.
- Fluids for automatic transmission and wet brakes having a dynamic friction coefficient of at most about 0.135 have been reported (for example, see Patent Document 3 below).
- a lubricating oil composition containing a diol compound having an alkyl group or an alkenyl group having 8 to 30 carbon atoms in order to improve friction characteristics such as a static friction coefficient of a wet clutch and a wet brake has been reported (for example, See Patent Document 4 below.)
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-279286
- Patent Document 2 JP-A-5-148492
- Patent Document 3 JP-A-5-186788
- Patent Document 4 Japanese Patent Application Laid-Open No. 2000-87061
- the compositions disclosed in Patent Documents 2 to 4 obtain a sufficient dynamic friction coefficient.
- a boron-containing ashless dispersant such as alkaline earth metal sulfonate
- the present invention meets these needs, and an object of the present invention is to provide a lubricating oil composition which is excellent in the effect of improving the dynamic friction coefficient of a wet clutch and can maintain a high dynamic friction coefficient.
- a lubricating oil composition containing a specific polyol compound and a specific amount of an ashless dispersant and a metal-based detergent has a synergistic effect on the dynamic friction coefficient of a wet clutch. And found that a high coefficient of dynamic friction could be maintained, and completed the present invention.
- the present invention relates to a lubricant base oil
- a lubricating oil composition comprising:
- the present invention relates to a lubricant base oil
- the method is to increase the dynamic friction coefficient of a wet clutch to 0-145 or more by using a lubricating oil composition containing the same and stably maintain the dynamic friction coefficient.
- a lubricating oil composition containing the same containing the same and stably maintain the dynamic friction coefficient.
- the present invention will be described in detail.
- any mineral oil and / or synthetic oil used as a base oil for ordinary lubricating oils can be used.
- mineral oils include, for example, lubricating oil fractions obtained by distilling crude oil under normal pressure and reduced pressure, and then removing the solvent, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrogenation. Oils of paraffinic type, naphthenic type, etc., and normal paraffins, which are obtained by appropriately combining one or more refining treatments such as refining, washing with sulfuric acid, and clay treatment, can be used.
- the synthetic oil is not particularly limited, but may be polyolefin (for example, 1-octene oligomer, 1-decene oligomer, ethylene-propylene oligomer, etc.) or a hydride thereof, an isobutene oligomer or a hydride thereof, I-soparaffin, alkylbenzene, alkynolenaphthalene, diester (for example, ditridecyl glutarate, di (2-ethylhexyl) diate, disodecyla dipate, ditridecyl adipate, di-2-ethynolehexyl sepacate, etc.), polyol ester (for example, Trimethylolpropane caprylate, trimethylol olepropaneperanoregonate, pentaerythritol tonole 2-ethynolehexanoate, pentaerythritol tolargonate,
- the lubricating base oil in the lubricating oil composition of the present invention is a hydrorefined mineral oil or a hydrocracked mineral oil, a Fischer-Tropsch oil, in that the activity of additives can be further increased and a high dynamic friction coefficient can be maintained.
- GTL gas to liquid
- Iso-paraffinic mineral oil, 1-decene oligomer and / or its hydride etc. obtained by isomerizing wax etc. containing much normal paraffin obtained in the dewaxing process of lubricating oil
- Those containing 50% by mass or more of one or more selected from poly- ⁇ -lefin-based synthetic oils are preferred, and those containing 70% by mass or more are particularly preferred.
- the kinematic viscosity of the lubricating base oil is arbitrary not particularly limited, usually, 1 0 0 ° kinematic viscosity that put in and C, the lower limit is 1 mm 2 / s, preferably 1. 5 mm 2 / s, more preferably 2.5 mm 2 / s, and the upper limit is 2 O mm V s, preferably 8 mm 2 / s, more preferably 5 mm 2 / s.
- the component (A) in the lubricating oil composition of the present invention is a trivalent or higher polyol and / or a condensation compound thereof.
- trivalent or higher polyol examples include a compound represented by the following general formula (1).
- R 1 is a hydrocarbon group, and m represents an integer of 3 or more.
- the number of carbon atoms in the hydrocarbon group is not particularly limited, but R 1 preferably has 2 to 20 carbon atoms from the viewpoint of improving the dynamic friction coefficient of the wet clutch. More preferably, it is from 10 to 10, particularly preferably from 3 to 6.
- m is an integer of 3 or more, but is preferably an integer of 10 or less, more preferably an integer of 6 or less, and an integer of 4 or less from the viewpoint of solubility in a lubricating base oil. It is particularly preferred that
- component (A) in the present invention examples include glycerin, trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, pentitols such as arabitol, hexitols such as sorbitol, and the like. These condensed compounds such as sorbitan and the like can be mentioned.
- condensation includes intramolecular condensation between functional groups in the same molecule, intermolecular condensation between two or more molecules, and self-condensation between the same species of compounds.
- oxygen those containing more than 30 wt% in the molecule (e.g., trimethylol propane: 35.7 mass 0/0, etc.) is preferably one containing more than 40 wt% (e.g. Torimechirorue Tan: 40.0 weight 0/0, Pentaerisuri tall: 47.0 mass 0/0, sorbitan: 48.
- glycerin is particularly desirable in terms of the balance between solubility in lubricating oil and the effect of improving the dynamic friction coefficient.
- the above-mentioned (A) trivalent or higher valent polyol and Z or a condensation compound thereof may be used alone or in combination of two or more.
- the lower limit of the component (A) in the lubricating oil composition of the present invention is 0.001% by mass, preferably 0.01% by mass, particularly preferably 0.1% by mass, based on the total amount of the composition. 0.3% by mass, the upper limit of which is 1% by mass, preferably 0.5% by mass, particularly preferably 0.1% by mass.
- the component (B) in the lubricating oil composition of the present invention is an ashless dispersant.
- Examples of the ashless dispersant include a nitrogen-containing compound having at least one alkyl group or alkenyl group having 40 to 400 carbon atoms in the molecule or a derivative thereof, or an alkenyl succinic acid imidizer. And one or more arbitrarily selected from these.
- the alkyl group or alkenyl group may be linear or branched, but is preferably, specifically, an oligomer of an olefin such as propylene, 1-butene, or isobutylene, or a copolymer of ethylene and propylene. Examples thereof include a branched alkyl group and a branched alkenyl group derived from an oligomer.
- the carbon number of this alkyl group or alkenyl group is 40 to 400, preferably 60 to 350.
- the solubility of the compound in the lubricating base oil decreases, while when the number of carbon atoms in the alkyl group or alkenyl group exceeds 400, the lubricating oil composition It is not preferable because the low-temperature fluidity of the material deteriorates.
- component (B) includes, for example,
- (B-1) succinic acid imide having at least one alkyl or alkenyl group having 40 to 400 carbon atoms in the molecule, or a derivative thereof
- (B-2) an alkyl or alkenyl group having 40 to 400 carbon atoms in the molecule Benzylamine or derivative thereof
- (B-3) a polyamine having at least one alkyl or alkenyl group having 40 to 400 carbon atoms in the molecule, or a derivative thereof
- examples of the succinic acid imid of the above (B-1) include compounds represented by the following general formula (2) or (3).
- .R 31 represents an alkyl group or alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and a represents an integer of 1 to 5, preferably 2 to 4.
- R 32 and R 33 are each independently 40 to 40 carbon atoms 0, preferably an alkyl or alkenyl group of 60 to 3 50, b is 0-4, preferably 1 Indicates an integer of 3.
- the succinic acid imid includes a so-called monotype succinic acid imid represented by the general formula (2) in which succinic anhydride is added to one end of a polyamine by imidation, and succinic anhydride at both ends of the polyamine. Include the so-called bis-type succinic acid imide represented by the general formula (3) in a form in which succinic acid is added. In the composition of the present invention, any of them and a mixture thereof can be used. It is more preferable to contain a mono-type succinic acid imid in that the dynamic friction coefficient can be further improved.
- examples of the benzylamine of the above (B-2) include compounds represented by the following general formula (4).
- R 34 represents an alkyl group or an alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and c represents an integer of 1 to 5, preferably 2 to 4.
- the benzylamine is obtained, for example, by reacting polyolefin (eg, propylene oligomer, polybutene, ethylene- ⁇ -olefin copolymer) with phenol to form an alkylphenol, and then adding formaldehyde and a polyamine (for example, diethylenetriamine, Triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, etc.) by a Mannich reaction.
- polyolefin eg, propylene oligomer, polybutene, ethylene- ⁇ -olefin copolymer
- formaldehyde and a polyamine for example, diethylenetriamine, Triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, etc.
- examples of the polyamine of (III-3) include compounds represented by the following general formula (5).
- R 35 represents an alkyl group or an alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and d represents an integer of 1 to 5, preferably 2 to 4.
- the method for producing this polyamine is not limited at all.
- a polyolefin such as propylene oligomer, polybutene, or ethylene-olefin copolymer
- ammonia ethylenediamine, diethylenetriamine, triethylene
- a polyamine such as tetramine, tetraethylenepentamine and pentaethylenehexamine.
- the nitrogen content of the above nitrogen-containing compound is arbitrary, but from the viewpoints of abrasion resistance, oxidation stability, friction characteristics, and the like, the nitrogen content is usually 0.01 to 10% by mass. Preferably, more preferably, 0.1 to 10% by mass is used.
- Examples of the derivative of the nitrogen-containing compound include, for example, monocarboxylic acids having 2 to 30 carbon atoms (such as fatty acids), oxalic acid, phthalic acid, trimellitic acid, A so-called acid in which a part or all of the remaining amino group and / or imino group is neutralized or amidated by reacting a polycarboxylic acid having 2 to 30 carbon atoms such as pyromellitic acid.
- a modified compound a so-called boric acid-modified compound in which boric acid is allowed to act on the above-mentioned nitrogen-containing compound to neutralize or amidate the remaining amino or Z or imino groups
- a sulfur-modified compound obtained by the action of a sulfur compound and a modified compound obtained by combining the above-mentioned nitrogen-containing compound with at least two types of modification selected from acid modification, boric acid modification, phosphoric acid modification, and sulfur modification. .
- the above-mentioned (B) ashless dispersant may be used alone or in combination of two or more.
- boric acid-modified succinic imide may be contained because the kinetic friction coefficient of a wet clutch can be further increased. It is particularly preferable to include a mixture of unmodified succinic acid imid and boric acid-modified succinic acid imid in that a high dynamic friction coefficient can be stably maintained. For the same reason, it is preferable that these succinic acid imides are monotype succinic acid imides.
- the content of the component (B) in the lubricating oil composition of the present invention is 0.1% by mass, preferably 0.05% by mass.
- the upper limit is 1% by mass, preferably 0.4% by mass, particularly preferably 0.2% by mass.
- the boric acid-modified ashless dispersant when used alone or in combination with the unmodified ashless dispersant as the ashless dispersant (B), its content is defined as the amount of boron and the lower limit thereof. Is preferably 0.05% by mass, more preferably 0.01% by mass, even more preferably 0.03% by mass or more, and the upper limit is 0.2% by mass. %, More preferably 0.1% by mass, and most preferably 0.05% by mass.
- the component (C) in the lubricating oil composition of the present invention is a metal-based detergent, and the combination of the component (A) and the component (B) synergistically increases the kinetic friction coefficient of the wet clutch. Can be
- any compound used as a metal-based detergent for a lubricating oil can be used.
- One or two or more metal-based detergents selected from phenates and alkaline earth metal salicylates can be used.
- the alkaline earth metal sulfonate is an alkyl aromatic sulfonic acid obtained by sulfonating an alkyl aromatic compound having a molecular weight of 130 to 150, preferably 400 to 700.
- Potassium earth metal salts, particularly magnesium salts and / or calcium salts, calcium salts are preferably used.
- alkyl aromatic sulfonic acid examples include so-called petroleum sulfonic acid and synthetic sulfonic acid.
- mahoganic acid which is obtained by sulfonating an alkyl aromatic compound of a lubricating oil fraction of a mineral oil, which is by-produced during the production of white oil.
- synthetic sulfonic acid include a / realkyl benzene having a linear or branched alkyl group, which is obtained as a by-product from an alkyl benzene production plant, which is a raw material of a detergent, or obtained by alkylating a polyolefin to benzene.
- a sulfonated product or a sulfonated alkylnaphthalene such as dinonirnaphthalene is used.
- the sulfonating agent used for sulfonating these alkyl aromatic compounds is not particularly limited, but usually, fuming sulfuric acid or sulfuric anhydride is used.
- alkaline earth metal phenates examples include alkyl phenols, alkyl phenol sulfides, alky earth metal salts of the Mannich reaction product of alkynolephenones, particularly magnesium salts and / or calcium salts. Examples represented by (6) to (8) can be given.
- R 5 , R 6 , R 7 , R 8 , R 9 and R 10 may be the same or different and each has 4 to 30 carbon atoms, preferably 6 to 30 carbon atoms. It represents 18 linear or branched alkyl groups, MM 2 and M 3 each independently represent an alkaline earth metal, preferably calcium and / or magnesium, and X represents an integer of 1-2.
- R 5 , R 6 , RR 8 , 19 and 11 ° specifically, butyl, pentyl, hexyl, heptyl, octyl, noel, decyl, Pendecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl, hencicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, Examples include a hexacosyl group, a heptacosyl group, an octakosinole group, a nonacosinole group, and a triacontyl group, which may be linear or branched. These may also be primary alkyl groups, secondary alkyl groups or tertiary alkyl
- alkaline earth metal salicylate examples include alkaline earth metal salts of arylsalicylic acid, particularly magnesium salts and Z or calcium salts, and examples thereof include those represented by the following general formula (9).
- R 11 represents a linear alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms
- M 4 represents an alkaline earth metal, preferably calcium and Z or magnesium. Show.
- R 11 examples include butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, and hexadecyl.
- alkaline earth metal sulfonate, alkaline earth metal phenate and alkali earth metal salicylate examples include the above-mentioned alkyl aromatic sulfonic acid, alkyl phenol, alkyl phenol sulfide, and alkylphenol mann-reactant. , Or arylalkyl salicylic acid, etc., directly with an alkaline earth metal base such as magnesium or Z or calcium alkaline earth metal oxides or hydroxides, or once with sodium salt or potassium salt.
- Salt Alkaline earth metal salicylate, neutral alkaline earth metal sulfonate, neutral Obtained by heating the alkaline earth metal phenate and neutral alkaline earth metal salicylate and excess alkaline earth metal salt and alkaline earth metal base in the presence of water Presence of basic alkaline earth metal sulfonate, basic alkaline earth metal phenate and basic alkaline earth metal salicylate ⁇ , carbon dioxide and boron compounds such as boric acid, boric acid and borate Overbased obtained by reacting neutral alkaline earth metal sulfonate, neutral alkaline earth metal phenate and neutral alkaline earth metal salicylate with alkaline earth metal base (Ultra basic) alkaline earth metal sulfonates, overbased (ultra basic) alkaline
- the metal-based detergent according to the present invention includes the above-mentioned neutral alkaline earth metal salts, basic Alkaline earth metal salts, overbased (ultrabasic) alkaline earth metal salts and mixtures thereof can be used.
- Metal-based detergents are usually commercially available in a diluted state with a light lubricating base oil or the like, and are available. Generally, the metal content is 1.0 to 20% by mass. More preferably, it is used in an amount of 2.0 to 16% by mass.
- the total base number of the metal-based detergent used in the present invention is arbitrary.In general, a total base number of 10 to 500 mgKOH / g can be used, but the kinetic friction coefficient of the wet clutch can be further improved, and the In terms of being able to maintain, it is desirable to use 150 to 40 OmgKOHZg, more preferably 250 to 35 OmgKOHZg.
- the total base number referred to here is the total base number by the perchloric acid method measured in accordance with 7. Means value.
- the component (C) can be used singly or in combination of two or more, but in that the dynamic friction coefficient of the wet clutch can be further increased, It is particularly preferred to use alkaline earth metal sulfonates.
- the content of the component (C) in the lubricating oil composition of the present invention is defined as the amount of alkali metal or alkaline earth metal based on the total amount of the composition, and the lower limit is 0.011% by mass, preferably The upper limit is 0.5% by mass, preferably 0.35% by mass, and most preferably 0.14% by mass. If the content of the component (C) is less than the lower limit, the effect of improving the dynamic friction coefficient is insufficient. If the content exceeds the upper limit, the dynamic friction coefficient is maintained due to clogging of the wet clutch. It is not preferable because performance degradation is a concern.
- the dynamic friction coefficient is further increased and the maintainability thereof is excellent, so that the boron content ⁇ caused by the component ( ⁇ ) and the alkali metal or alkaline earth metal caused by the component (C) are used.
- the mass ratio ( ⁇ / ⁇ ) to ⁇ is preferably 2.8 or more, more preferably 3 or more, even more preferably 3.5 or more, and 10 or less. And more preferably 8 or less.
- the lubricating oil composition of the present invention preferably further comprises (D) a friction modifier. No.
- any compound usually used as a friction modifier for lubricating oils can be used, and an alkyl group or alkenyl having 6 to 30 carbon atoms can be used.
- Examples of the amine compound include linear or branched, preferably linear, aliphatic monoamines having 6 to 30 carbon atoms, linear or branched, preferably linear, aliphatic polyamines, or these. Examples thereof include an alkylene oxide adduct of an aliphatic amine.
- Examples of the fatty acid ester include esters of a linear or branched, preferably linear, fatty acid having 7 to 31 carbon atoms and an aliphatic monohydric alcohol or an aliphatic polyhydric alcohol.
- Examples of the fatty acid amide include an amide of a linear or branched, preferably linear, fatty acid having 7 to 31 carbon atoms and an aliphatic monoamine or aliphatic polyamine.
- Examples of the fatty acid include linear or branched, preferably linear, fatty acids having 7 to 31 carbon atoms.
- fatty acid metal salts include straight-chain or branched, preferably straight-chain fatty acids having 7 to 31 carbon atoms, such as alkaline earth metal salts (magnesium salts, calcium salts, etc.) and zinc salts.
- alkaline earth metal salts magnesium salts, calcium salts, etc.
- zinc salts such as alkaline earth metal salts (magnesium salts, calcium salts, etc.) and zinc salts.
- one or two or more compounds arbitrarily selected from these friction modifiers can be contained in an arbitrary amount.
- the content is determined by the composition It is desirably 0.01 to 5.0% by mass, preferably 0.03 to 3.0% by mass, based on the total amount of the substance.
- the lubricating oil composition of the present invention may further contain a known additive used for lubricating oil, for example, a viscosity index improver, an extreme pressure agent or an antiwear agent, an antioxidant, and an alcohol other than the component (A).
- a viscosity index improver for example, an extreme pressure agent or an antiwear agent, an antioxidant, and an alcohol other than the component (A).
- Types, corrosion inhibitors, antioxidants, demulsifiers, metal deactivators, defoamers and the like can be used.
- the viscosity index improver include a so-called non-polymer such as a copolymer of one or more monomers selected from various methacrylates or a hydrogenated product thereof.
- examples thereof include a dispersion-type viscosity index improver and a so-called dispersion-type viscosity index improver obtained by copolymerizing various methacrylates containing a nitrogen compound.
- examples of other viscosity index improvers include non-dispersed and dispersed ethylene-olefin copolymers.
- ⁇ -olefin examples include propylene, 1-butene, 1-pentene, etc.
- hydride thereof polyisobutylene or its hydrogenated product, hydrogenated styrene-copolymer, styrene-copolymer of maleic anhydride
- coalescence and alkyl styrene examples include propylene, 1-butene, 1-pentene, etc.
- the molecular weight of these viscosity index improvers must be selected in consideration of shear stability.
- the number average molecular weight of the viscosity index improver is, for example, in the case of dispersible and non-dispersible polymethacrylates, from 50,000 to 150,000, preferably from 5,000 to 5,000.
- 50,000 to 150,000 preferably from 5,000 to 5,000.
- 35,000 is polyisobutylene or a hydride thereof
- 800 to 50,000, preferably 1,000 to 4,000 is ethylene- ⁇ .
- the copolymer is preferably from 800 to 150,000, preferably from 3,000 to 12,200.
- polymethacrylate particularly dispersed polymethacrylate, from the viewpoint that the dynamic friction coefficient of the wet clutch can be further improved.
- one or two or more compounds arbitrarily selected from these viscosity index improvers can be contained in any amount, but usually, the content is It is desirable that the content is 0.1 to 40.0% by mass based on the total amount of the composition.
- the extreme pressure agent or the antiwear agent include a phosphorus-containing compound, a sulfur-containing compound, a phosphorus-monosulfur-containing compound, a boron-containing compound, and the like.
- Phosphorus-containing compounds include phosphoric acid monoesters, phosphoric acid diesters, phosphoric acid triesters, phosphorous acid monoesters, phosphorous acid diesters, phosphorous acid triesters, and those esters and amines Or salts with metals such as alkanolamines and zinc.
- sulfur-containing compound disulfides, sulfurized olefins, sulfurized oils and fats, dithiocarbamates and the like can be used.
- the phosphorus-sulfur-containing compound thiophosphates, thiophosphites, and salts of these esters with metals such as amines, alkanolamines, and zinc can be used.
- the boron-containing compound include boric acid, boric acid monoester, boric acid diester, boric acid triester, and polyamine condensates, polyol condensates, phosphite adducts, and dehydration reaction products with mercapto alcohols And the like.
- the compounding amount is 0.01 to 2% by mass, preferably 0.1 to: L mass based on the total amount of the composition. / 0 .
- any one generally used in lubricating oils such as a funinol-based compound and a amine-based compound, can be used.
- alkylphenols such as 2,6-di-tert-butyl-4-methylphenol and bisphenols such as methylene-1,4,4-bisphenol (2,6-di-tert-butynole 4-methylphenol)
- Naphthylamines such as ⁇ -naphthylamine, dialkyldiphenylamines, zinc dialkyldithiophosphates such as zinc di-2-ethylhexyldithiophosphate, (3,5-di-tert-butylyl) 4-Hydroxyphenyl) fatty acid (propionic acid, etc.) or (3-methyl-5-tert-butyl-1-hydroxy-1-phenyl) fatty acid (propionic acid, etc.) and a monohydric or polyhydric alcohol such as methanol, octanol , Octa de cannonole, 1, 6 — hexanedionole, Neopentinore glyconore, Chi
- One or more antioxidants arbitrarily selected from these can be contained in any amount, but usually the content is from 0 to 0 1 to 0 based on the total amount of the composition. Desirably, it is 5.0% by mass.
- Examples of the alcohol other than the component (A) include monohydric or dihydric, preferably dihydric aliphatic alcohols having 2 to 30 carbon atoms, and specifically, for example, ethylene glycolone, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,4-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1,2-hexanediol Diols such as 2-heptanediol, 1,2-octanediol, 1,2-decanediol, 1,2-dodecanediol, 1,2-tetradecanediol, 1,2-hexadecanediol, and 1,2-octadecanediol And the like.
- ethylene glycolone 1,2-propylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,4-butylene glycol, 1,2-
- the compounding amount is 0.001-1% by mass based on the total amount of the composition. It is.
- corrosion inhibitor examples include benzotriazole, tolyltriazole, thiadiazole and imidazole compounds.
- Examples of the protective agent include petroleum sulfonate, alkylbenzene sulfonate, dinoninolephthalene / lefonate, alkenyl succinate, and polyhydric alcohol ester.
- demulsifier examples include polyalkylene glycol-based nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene phenol phenol / polyether, and polyoxyethylene alkyl naphthyl ether.
- metal deactivator examples include imidazoline, pyrimidine derivatives, alkylthiazazole, mercaptobenzothiazole, benzotriazole or derivatives thereof,
- 1,3,4-thiadiazole polysulfide 1,3,4-thiadiazolyl-1,2,5-bisdialkyldithiocarbamate, 2- (alkyldithio) benzimidazole, and ⁇ - ( ⁇ -carboxybenzylthio) propionnitrile And the like.
- antifoaming agent examples include silicone, fluorosilicone, and fluoroalkyl ether.
- the content is 0.01 to 5 mass% for the corrosion inhibitor, the antioxidant, and the demulsifier based on the total amount of the lubricating oil composition. %, For metal deactivators, 0.005 to 1% by mass, and for defoamers and colorants, generally 0 to 0.001 to 1% by mass.
- the lubricating oil composition of the present invention having the above-described configuration is excellent in the effect of improving the dynamic friction coefficient of the wet clutch and maintaining the same. Therefore, the composition of the present invention is very effective for reducing the size of a transmission and reducing pump loss, and can be expected to contribute to improving the fuel efficiency of automobiles.
- Various lubricating base oils and additives shown in Table 1 were blended to prepare a lubricating oil composition according to the present invention (Examples 1-2) and a comparative lubricating oil composition (Comparative Examples 1-3). did. The amount of each additive is based on the total amount of the composition.
- the friction characteristics test of the wet clutch was performed using a SAE No. 2 testing machine in accordance with J ASO M348-95 “Test Method for Oil Friction Characteristics of Automatic Transmissions”. This test consists of a dynamic friction test and a static friction test.In the dynamic friction test, after rotating the clutch at 3600 rpm and an inertial mass of 0.343 kgm without load, the clutch is pressed by applying pressure and the rotation is stopped. Let it. The friction coefficient was calculated from the torque generated when the relative rotational speed of the clutch was 1800 rpm, and this was arranged as the dynamic friction coefficient. In the test, the dynamic friction test and the static friction test were repeated, and the dynamic friction coefficient improvement performance and the stability of the friction coefficient of each composition were evaluated at 500 cycles and 3000 cycles of the dynamic friction coefficient.
- the lubricating oil compositions of Examples 1 and 2 according to the present invention have a high 500-cycle dynamic friction coefficient of 0.145 or more, and have a high boron content (B) due to the component (B).
- composition of the present invention synergistically improves and maintains the dynamic friction coefficient by the combined use of the component (A), the component (B) and the component (C).
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Abstract
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JP2003125887A JP2004331721A (ja) | 2003-04-30 | 2003-04-30 | 潤滑油組成物 |
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JP5188019B2 (ja) * | 2005-11-02 | 2013-04-24 | Jx日鉱日石エネルギー株式会社 | 潤滑油組成物 |
WO2007052833A1 (ja) * | 2005-11-02 | 2007-05-10 | Nippon Oil Corporation | 潤滑油組成物 |
JP5207599B2 (ja) | 2006-06-08 | 2013-06-12 | Jx日鉱日石エネルギー株式会社 | 潤滑油組成物 |
CA2671911C (en) * | 2006-12-18 | 2015-04-21 | The Lubrizol Corporation | Functional fluid comprising a detergent and friction modifier |
JP5473236B2 (ja) * | 2008-03-10 | 2014-04-16 | Jx日鉱日石エネルギー株式会社 | 潤滑油組成物 |
JP5542322B2 (ja) * | 2008-11-20 | 2014-07-09 | コスモ石油ルブリカンツ株式会社 | 農業機械用潤滑油組成物 |
US8778853B2 (en) * | 2011-11-11 | 2014-07-15 | Chevron Oronite Company Llc. | Glycerol-containing functional fluid |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05105895A (ja) * | 1991-06-28 | 1993-04-27 | Nippon Cooper Kk | 湿式クラツチ用又は湿式ブレーキ用潤滑油組成物 |
JPH05148492A (ja) * | 1991-11-27 | 1993-06-15 | Nippon Oil Co Ltd | 自動変速機油組成物 |
JPH05186788A (ja) * | 1991-06-03 | 1993-07-27 | Ethyl Petroleum Additives Inc | 自動トランスミツシヨン用および湿式ブレーキ用流体並びにそれらのための添加剤パツケージ |
WO1994004637A1 (en) * | 1992-08-18 | 1994-03-03 | Ethyl Japan Corporation | Lubricating oil composition for wet clutch or wet brake |
JP2001214186A (ja) * | 2000-01-31 | 2001-08-07 | Asahi Denka Kogyo Kk | 潤滑性組成物 |
JP2001279286A (ja) * | 2000-03-29 | 2001-10-10 | Nippon Mitsubishi Oil Corp | 潤滑油組成物 |
-
2003
- 2003-04-30 JP JP2003125887A patent/JP2004331721A/ja active Pending
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2004
- 2004-04-26 WO PCT/JP2004/006008 patent/WO2004096958A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05186788A (ja) * | 1991-06-03 | 1993-07-27 | Ethyl Petroleum Additives Inc | 自動トランスミツシヨン用および湿式ブレーキ用流体並びにそれらのための添加剤パツケージ |
JPH05105895A (ja) * | 1991-06-28 | 1993-04-27 | Nippon Cooper Kk | 湿式クラツチ用又は湿式ブレーキ用潤滑油組成物 |
JPH05148492A (ja) * | 1991-11-27 | 1993-06-15 | Nippon Oil Co Ltd | 自動変速機油組成物 |
WO1994004637A1 (en) * | 1992-08-18 | 1994-03-03 | Ethyl Japan Corporation | Lubricating oil composition for wet clutch or wet brake |
JP2001214186A (ja) * | 2000-01-31 | 2001-08-07 | Asahi Denka Kogyo Kk | 潤滑性組成物 |
JP2001279286A (ja) * | 2000-03-29 | 2001-10-10 | Nippon Mitsubishi Oil Corp | 潤滑油組成物 |
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