WO2010079744A1 - Composition lubrifiante - Google Patents

Composition lubrifiante Download PDF

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Publication number
WO2010079744A1
WO2010079744A1 PCT/JP2010/000041 JP2010000041W WO2010079744A1 WO 2010079744 A1 WO2010079744 A1 WO 2010079744A1 JP 2010000041 W JP2010000041 W JP 2010000041W WO 2010079744 A1 WO2010079744 A1 WO 2010079744A1
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WO
WIPO (PCT)
Prior art keywords
oil
lubricating
lubricating oil
trihydroxybenzoic acid
ester
Prior art date
Application number
PCT/JP2010/000041
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English (en)
Japanese (ja)
Inventor
野中鉄也
設楽裕治
開米貴
Original Assignee
株式会社ジャパンエナジー
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Application filed by 株式会社ジャパンエナジー filed Critical 株式会社ジャパンエナジー
Priority to JP2010545744A priority Critical patent/JP5693240B2/ja
Priority to US13/143,755 priority patent/US20110275549A1/en
Priority to CN2010800041571A priority patent/CN102272276A/zh
Publication of WO2010079744A1 publication Critical patent/WO2010079744A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/76—Esters containing free hydroxy or carboxyl groups
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • 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
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • 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
    • C10M2207/28—Esters
    • C10M2207/284—Esters of aromatic monocarboxylic acids
    • 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
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/041—Triaryl phosphates
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • 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
    • 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
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • 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
    • 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
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
    • 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
    • C10N2040/25—Internal-combustion engines

Definitions

  • the present invention relates to a lubricating oil composition, in particular, a lubricating oil composition used as a lubricating oil for internal combustion engines, a drive system lubricating oil or a working oil.
  • Patent Document 1 a lubricating oil for internal combustion engines in which dimer acid diamide and molybdenum dithiocarbamate (MoDTC) are blended.
  • the pressure energy of hydraulic pumps is converted into kinetic energy (work energy) for systems that require large work energy such as injection molding machines, machine tools, press machines, and forging press machines.
  • the hydraulic system that can be used is widely used. Even in this hydraulic system, energy saving needs are increasing, and energy saving measures are also required for hydraulic fluid that is the pressure medium of the hydraulic system, and low viscosity and high viscosity index are being achieved. As a result of lowering the viscosity, there has been a problem of reduced wear resistance and seizure of the sliding portion. In recent years, the load on the sliding portion has increased due to the downsizing, speeding up, and fuel and energy savings of mechanical systems, and there has been a demand for lubricating oils that are more excellent in lubricity such as wear resistance.
  • the ideal characteristic of the lubricating oil is that there is little friction loss at high speeds and low speeds, and there is little wear such as fretting wear. That is, the lubricating oil is required to reduce friction loss and reduce wear. Therefore, it is desired that the friction loss is small and the wear is small even when the contact surface speed is high, such as when rotating at high speed, or when high torque is applied at low speed.
  • To reduce the friction loss at high speed it is necessary to reduce the viscosity of the lubricating base oil itself.
  • the viscosity of the base oil is lowered, it becomes weak against wear such as fretting, that is, contact between base materials such as sliding metals may occur and wear or seizure may occur.
  • 3,4,5-trihydroxybenzoic acid ester is (1) having a function of reducing friction coefficient and suppressing wear; (2) Because hematite, which is iron red rust, is reduced to hard and strong black rust (magnetite), it has a high anti-rust effect. (3)
  • the 3,4,5-trihydroxybenzoic acid compound itself has low solubility in mineral-based lubricating base oils, so it does not exhibit the above effect as it is, but it can exhibit its effect when used with a cleaning dispersant. , As a result, they have come up with the present invention.
  • the present invention solves various problems in the sliding part which is more severe by the above-mentioned miniaturization, high speed, fuel saving and energy saving, and the problem to be solved by the present invention is to greatly reduce wear. And providing a lubricating oil composition having a low friction coefficient and having a high rust prevention property in lubrication of iron-based sliding parts.
  • the present invention is as follows. (1) To the lubricating base oil, 3,4,5-trihydroxybenzoic acid ester, 0.01 to 10% by mass on the basis of the total amount of the lubricating oil composition, and the detergent dispersant based on the total amount of the lubricating oil composition A lubricating oil composition characterized by adding 0.1 to 20% by mass. (2) 3,4,5-Trihydroxybenzoate is synthesized from 3,4,5-trihydroxybenzoic acid and a linear or branched alcohol having 3 to 12 carbon atoms.
  • the lubricating oil composition according to the above (1) which is an alkyl benzoate.
  • the lubricating oil composition of the present invention comprises a lubricating base oil containing an ester of 3,4,5-trihydroxybenzoic acid and a detergent dispersant, thereby significantly reducing wear and having a low coefficient of friction and stability.
  • the iron-based sliding part has a high antirust effect. Therefore, the lubricating oil composition of the present invention is suitable for long-term use and has a remarkable effect on energy saving due to the low and stable friction coefficient characteristics.
  • the lubricating oil composition of the present invention comprises a lubricating base oil containing 0.01 to 10% by mass of 3,4,5-trihydroxybenzoic acid ester and 0.1 to 20% by mass of a detergent dispersant. is there. Since 3,4,5-trihydroxybenzoic acid ester has low solubility in hydrocarbon base oils other than mineral base oils and base oils having polar groups such as esters and ethers, it itself has lubricating properties. Although it cannot be added to such a concentration that the improvement can be exerted, it can be used at a concentration at which the lubricity is improved by using it together with a cleaning dispersant.
  • a lubricating base oil such as mineral oil, synthetic oil, animal or vegetable oil can be used. Further, two or more of these lubricating base oils can be mixed and used.
  • the physical properties of the lubricating base oil used in the present invention are not particularly limited, but those having a kinematic viscosity of 5 to 1000 mm 2 / s at 40 ° C. are preferred, and energy saving can be achieved by lowering the viscosity. It is about 500 mm 2 / s, more preferably 5 to 100 mm 2 / s. However, it is preferable to use a high viscosity base oil for high load applications.
  • the viscosity index is preferably 90 or more, more preferably 100 to 250.
  • the pour point which is a low temperature characteristic, is preferably ⁇ 10 ° C. or lower, more preferably ⁇ 15 ° C. or lower.
  • the flash point is preferably 70 ° C. or higher, and more preferably 150 ° C. or higher.
  • the lubricating base oil is preferably blended in an amount of 70 to 99 mass%, more preferably 80 to 98 mass%, based on the total amount of the lubricating oil composition.
  • Mineral oil-based lubricating base oils include hydrocracking, solvent extraction, hydrorefining, and solvent removal of lubricating oil fractions obtained by atmospheric distillation of crude oil or vacuum distillation of atmospheric distillation residues.
  • a refined lubricating base oil obtained by appropriately combining lubricating oil refining means such as wax, hydrodewaxing, and clay treatment can be suitably used.
  • Mineral-based lubricating base oils made from such a relatively high boiling fraction of petroleum are generally inexpensive and are widely used in various lubricating oils and greases. Therefore, in the present invention, it is economical and preferable to use this mineral oil base oil alone.
  • examples of the synthetic oil base oil include poly- ⁇ -olefin (PAO), alkylbenzene, alkylnaphthalene, ester, ether, glycol, silicone oil, and fluorinated oil. Of these, PAO and esters are preferably used. PAO is chemically inert, has excellent viscosity characteristics, and is commercially available with a wide range of viscosities.
  • Esters are also commercially available as compounds with various molecular structures, each having unique characteristics and higher flash point than hydrocarbon base oils of the same viscosity.
  • the ester can be obtained by a dehydration condensation polymerization reaction between an alcohol and a fatty acid. Esters are suitable as lubricating base oils.
  • Animal and vegetable oil-based lubricating base oils include milk fat, beef tallow, lard (pig tallow), sheep fat, beef leg oil, whale oil coconut oil, bonito oil, herring oil, coconut oil, and soybean oil, rapeseed oil, Sunflower oil, safflower oil, peanut oil, corn oil, cottonseed oil, rice bran oil, kapok oil, sesame oil, olive oil, linseed oil, castor oil, cacao butter, sha fat, palm oil, palm kernel oil, coconut oil, hemp seed oil, Rice oil and tea seed oil are preferred, but not limited thereto.
  • these base oils such as mineral oils, synthetic oils and animal and vegetable oils can be appropriately combined and blended at an appropriate ratio so as to satisfy various performances required for each application.
  • a plurality of lubricating base oils of mineral oil type, synthetic oil type and animal and vegetable oil type may be used.
  • 3,4,5-trihydroxybenzoic acid ester has high solubility in lubricating base oils having polar groups such as synthetic esters, ethers, or animal and plant systems, when these base oils are used, The amount of the cleaning dispersant added can be reduced.
  • the lubricating base oils having these polar groups generally have low hydrolysis resistance, and from the economical aspect, the lubricating base oils having polar groups with respect to 100 parts by weight of the mineral-based lubricating base oil
  • the mixing ratio is preferably 50 parts by mass or less, more preferably 5 to 30 parts by mass, based on the lubricating base oil.
  • 3,4,5-trihydroxybenzoic acid ester In the present invention, 3,4,5-trihydroxybenzoic acid ester is added.
  • the ester is synthesized from 3,4,5-trihydroxybenzoic acid and a linear or branched alcohol having 3 to 12 carbon atoms.
  • the 3,4,5-trihydroxybenzoic acid alkyl esters are preferred.
  • the alkyl esters of 3,4,5-trihydroxybenzoic acid propyl ester, butyl ester, hexyl ester, octyl ester, decyl ester and dodecyl ester are preferable, and propyl ester of 3,4,5-trihydroxybenzoic acid is particularly preferable.
  • 3,4,5-Trihydroxybenzoic acid octyl ester is preferred from the standpoint of the balance between solubility in base oil and improvement in lubricity.
  • the alkyl group may be linear or branched.
  • the 3,4,5-trihydroxybenzoic acid ester is added in an amount of 0.01 to 10% by mass, preferably 0.1 to 5% by mass, based on the total amount of the lubricating oil composition. If the amount is less than 0.01% by mass, the reduction in wear, the reduction in the friction coefficient, and the rust prevention effect cannot be sufficiently achieved. Can not be expected, it is not economical.
  • detergent dispersant examples include metal detergents such as alkaline earth metal sulfonates, alkaline earth metal phenates, and alkaline earth metal salicylates, or polyalkenyl succinimides, polyalkenyl succinates and their respective boric acid modifications. And phosphonate types, or ashless dispersants such as benzylamines, boron-containing benzylamines, monovalent or divalent carboxylic acid amides represented by fatty acids or succinic acid are suitable.
  • metal detergents such as alkaline earth metal sulfonates, alkaline earth metal phenates, and alkaline earth metal salicylates
  • polyalkenyl succinimides polyalkenyl succinates and their respective boric acid modifications.
  • phosphonate types, or ashless dispersants such as benzylamines, boron-containing benzylamines, monovalent or divalent carboxylic acid amides represented by fatty acids or succinic acid are
  • Alkaline earth metal sulfonate is an alkaline earth metal salt of a product obtained by sulfonating an alkyl aromatic compound using fuming sulfuric acid or sulfuric acid
  • alkaline earth metal phenate is alkylphenol sulfide or alkylphenol sulfide and formaldehyde.
  • the alkaline earth metal salt of the Mannich reaction product of alkylphenol obtained by the reaction, and the alkaline earth metal salicylate are alkaline earth metal salts of alkylsalicylic acid. Examples of the alkaline earth metal that forms a salt include calcium, barium, and magnesium, with calcium being particularly preferred.
  • an ashless detergent obtained by the reaction of polybutenyl succinate polyamine by maleating a polybutene having a molecular weight of 1,000 to several thousand is particularly suitable.
  • the detergent dispersant is added in an amount of 0.1 to 20% by mass based on the total amount of the lubricating oil composition, and it is particularly preferable to add 1 to 10% by mass. If the amount is less than 0.1% by mass, the effect cannot be sufficiently exerted, and even if it is added in excess of 20% by mass, the effect cannot be expected for an increase in the amount added, and this is not economical.
  • Friction modifiers include organic molybdenum compounds such as molybdenum dithiocarbamate and molybdenum dithiophosphate, and nitrogenous compounds such as aliphatic amines, aliphatic amides, aliphatic imides and alcohols, esters, phosphate ester amine salts, and phosphite amines.
  • Deactivate metals such as salts, phosphate esters and zinc dialkyldithiophosphates as antiwear agents, sulfurized olefins and sulfurized fats and oils as extreme pressure agents, amine and phenolic antioxidants as antioxidants
  • the agent include benzotriazole
  • examples of the rust inhibitor include alkenyl succinic acid ester and partial ester
  • examples of the antifoaming agent include a silicone compound and an ester-based antifoaming agent.
  • a lubricating oil for an internal combustion engine, a drive system lubricating oil, and a working oil are suitable.
  • A 3,4,5-trihydroxybenzoic acid ester
  • A1 3,4,5-trihydroxybenzoic acid propyl (n-propyl) ester [manufactured by Iwate Chemical Co., Ltd.]
  • A2) 3,4,5-Trihydroxybenzoic acid octyl (n-octyl) ester [Wako Pure Chemical Industries, Ltd.]
  • B Lubricating base oil (B1) Paraffinic mineral oil (40 ° C. kinematic viscosity: 32 mm 2 / s, viscosity index: 106, pour point: ⁇ 15 ° C., flash point: 230 ° C.) (B2) Polyol ester oil (40 ° C. kinematic viscosity: 10 mm 2 / s, viscosity index: 95, pour point: ⁇ 50 ° C., flash point: 190 ° C.) (B3) Polyalphaolefin (PAO, 40 ° C. kinematic viscosity: 400 mm 2 / s, viscosity index: 150, pour point: ⁇ 35 ° C., flash point: 280 ° C.)
  • Paraffinic mineral oil 40 ° C. kinematic viscosity: 32 mm 2 / s, viscosity index: 106, pour point: ⁇ 15 ° C., flash point: 230 ° C
  • C detergent dispersant (C1) neutral calcium sulfonate (C2) polybutenyl succinimide (D) other additives (D1) antioxidant: di-t.-butyl-p.-cresol ( DBPC) (D2) Antiwear agent: tricresyl phosphate (TCP) (D3) Friction modifier: Molybdenum dithiocarbamate (MoDTC)
  • Each of the lubricant compositions of Examples 1 to 7 and Comparative Examples 1 to 4 thus obtained was evaluated for appearance and lubrication performance (friction coefficient, wear depth) as a general lubricant composition.
  • the measurement and evaluation were performed by the following method. ⁇ appearance ⁇ After blending at the blending ratio shown in Table 1 and cooling to room temperature, the finished composition was visually observed. The case where a precipitate or a precipitate was generated was rejected, and the case where a uniform liquid was obtained was determined as acceptable.
  • Abrasion resistance test The wear resistance of the lubricating oil compositions of Examples 1 to 7 and Comparative Examples 1 to 4 was measured using a ball / disk type reciprocating friction tester.
  • the test conditions were such that the oil film was not easily formed and the sliding speed was low (1 cm / s), high load (2200 gf), the amplitude was 20 mm, and the test was started at room temperature, so that the strict lubrication conditions were achieved. Friction was performed. Incidentally, bearing carbon steel (SUJ-2) was used as a test piece for the ball and the disk. The friction coefficient after 2 hours and the disc wear depth after the test were measured with a stylus type surface roughness meter.
  • SUJ-2 bearing carbon steel
  • the lubricating oil compositions of Examples 1 to 7 all became uniform liquids.
  • the friction coefficient in the friction test of these examples is 0.05 to 0.07 and is low and stable. Further, the disc wear depth after the friction test is 0.04 to 0.06 ⁇ m, which is a level with almost no wear.
  • Comparative Example 1 in which propyl 3,4,5-trihydroxybenzoate was added but no detergent dispersant was added, the composition was turbid and propyl 3,4,5-trihydroxybenzoate was It can be seen that it is not uniformly dissolved or dispersed. For this reason, the friction coefficient is high and the disk wear depth is also large.
  • the lubricating oil composition of the present invention has a characteristic that the wear is remarkably reduced and the coefficient of friction is low and stable, and also has a high rust prevention effect in the iron-based sliding part. It is useful as a lubricating oil for some parts, particularly as a lubricating oil for internal combustion engines, a drive system lubricating oil or a working oil.

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

Abstract

La composition lubrifiante ci-décrite réduit fortement l'abrasion et présente un faible coefficient de frottement et une grande résistance à la corrosion lors de la lubrification d'un élément de glissement à base de fer. Cette composition comprend une huile lubrifiante de base, un ester d'acide 3,4,5-trihydroxybenzoïque dans une quantité de 0,01 à 10 % en masse par rapport à la quantité totale de la composition lubrifiante, et un dispersant détergent dans une quantité de 0,1 à 20 % en masse par rapport à la quantité totale de la composition lubrifiante.
PCT/JP2010/000041 2009-01-09 2010-01-06 Composition lubrifiante WO2010079744A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2010545744A JP5693240B2 (ja) 2009-01-09 2010-01-06 潤滑油組成物
US13/143,755 US20110275549A1 (en) 2009-01-09 2010-01-06 Lubricating oil composition
CN2010800041571A CN102272276A (zh) 2009-01-09 2010-01-06 润滑油组合物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009003317 2009-01-09
JP2009-003317 2009-01-09

Publications (1)

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WO2010079744A1 true WO2010079744A1 (fr) 2010-07-15

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US (1) US20110275549A1 (fr)
JP (1) JP5693240B2 (fr)
CN (1) CN102272276A (fr)
WO (1) WO2010079744A1 (fr)

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* Cited by examiner, † Cited by third party
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EP2527420A1 (fr) * 2010-01-18 2012-11-28 JX Nippon Oil & Energy Corporation Composition d'huile de graissage
JP2017008229A (ja) * 2015-06-24 2017-01-12 竹本油脂株式会社 摺動面用潤滑油組成物
WO2018186283A1 (fr) * 2017-04-05 2018-10-11 Ｊｘｔｇエネルギー株式会社 Dispositif hydraulique et composition d'huile hydraulique
EP2721128B1 (fr) * 2011-06-15 2019-08-07 The Lubrizol Corporation Composition lubrifiante contenant un ester d'un acide carboxylique aromatique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6405216B2 (ja) * 2014-12-09 2018-10-17 シェルルブリカンツジャパン株式会社 すべり案内面用潤滑油組成物
CN106381189B (zh) * 2016-08-18 2019-03-12 宝鸡文理学院 基于没食子酸的合成酯类化合物的润滑油基础油及其应用
CN108277066A (zh) * 2018-02-28 2018-07-13 河南道骐汽车科技有限公司 一种长寿命环保型高压无灰抗磨液压油
WO2019240965A1 (fr) * 2018-06-11 2019-12-19 Exxonmobil Research And Engineering Company Compositions anti-usure sans zinc, compositions d'huile hydraulique, et leurs procédés d'utilisation
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CN110776972B (zh) * 2019-11-08 2021-10-26 宝鸡文理学院 一种基于绿色可再生资源的合成酯类润滑油基础油

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