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WO2020007945A1 - Composition lubrifiante - Google Patents

Composition lubrifiante Download PDF

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Publication number
WO2020007945A1
WO2020007945A1 PCT/EP2019/067912 EP2019067912W WO2020007945A1 WO 2020007945 A1 WO2020007945 A1 WO 2020007945A1 EP 2019067912 W EP2019067912 W EP 2019067912W WO 2020007945 A1 WO2020007945 A1 WO 2020007945A1
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WO
WIPO (PCT)
Prior art keywords
molybdenum
lubricating composition
composition according
friction
organo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/067912
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English (en)
Inventor
Sean M NGUYEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Shell USA Inc
Original Assignee
Shell Internationale Research Maatschappij BV
Shell Oil Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV, Shell Oil Co filed Critical Shell Internationale Research Maatschappij BV
Publication of WO2020007945A1 publication Critical patent/WO2020007945A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
    • 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
    • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • 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 [having hydrocarbon substituents containing less than thirty carbon atoms]
    • 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
    • C10M2223/045—Metal containing thio derivatives
    • 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
    • C10N2010/12—Groups 6 or 16
    • 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
    • C10N2030/54—Fuel economy
    • 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 to a lubricating oil
  • composition which is suitable for lubricating internal combustion engines and which has improved friction and wear reduction and improved fuel economy.
  • Optimising lubricants through the use of high performance base stocks and novel additives represents a flexible solution to a growing challenge.
  • Friction-reducing additives (which are also known as friction modifiers) are important lubricant components in reducing fuel consumption and various such additives are already known in the art.
  • Friction modifiers can be conveniently divided into two categories, that is to say, metal-containing friction modifiers and ashless (organic) friction modifiers.
  • Organo-molybdenum compounds are amongst the most common metal-containing friction modifiers. Typical organo-molybdenum compounds include molybdenum
  • MoDTC molybdenum dithiophosphates
  • MoDTP molybdenum dithiophosphates
  • molybdenum amines molybdenum alcoholates
  • molybdenum alcohol-amides W09826030, W09931113,
  • W09947629 and WO9966013 describe tri-nuclear molybdenum compounds for use in lubricating oil compositions.
  • the trend towards low-ash lubricating oil compositions has resulted in an increased drive to achieve low friction and improved fuel economy using ashless friction modifiers.
  • Ashless (organic) friction modifiers which have been used in the past typically comprise esters of fatty acids and polyhydric alcohols, fatty acid amides, amines derived from fatty acids and organic dithiocarbamate or dithiophosphate compounds.
  • esters of fatty acids and polyhydric alcohols typically comprise esters of fatty acids and polyhydric alcohols, fatty acid amides, amines derived from fatty acids and organic dithiocarbamate or dithiophosphate compounds.
  • US2016/0251590 discloses the use of fatty amine salts as friction modifiers for lubricants.
  • molybdenum friction modifiers typically outperform ashless friction modifiers in the boundary regime.
  • organo-molybdenum compounds are useful for providing high levels of friction modification, there are also known limitations with these compounds.
  • molybdenum-based friction modifiers can be any suitable friction modifiers.
  • molybdenum-based friction modifiers can be any suitable friction modifiers.
  • the present invention provides a lubricating composition for use in the crankcase of an engine comprising (i) a base oil; (ii) one or more organo-molybdenum compounds at a level sufficient to provide from 50 to 500 ppmw of molybdenum; and (iii) from 0.2 wt% to 5 wt%, by weight of the lubricating
  • composition of one or more fatty diamine salt.
  • Figure 1 shows a plot of the results from the
  • a lubricating oil composition comprising a combination of organo-molybdenum compound and fatty diamine salt friction reducing additives has improved friction and wear reduction and improved fuel economy, while requiring reduced levels of organo-molybdenum compounds .
  • compositions of the present invention is one or more organo-molybdenum compounds at a level sufficient to provide from 50 to 500 ppmw of molybdenum, preferably at a level sufficient to provide from 50 to 300 ppmw of molybdenum.
  • the organo-molybdenum compound for use herein is preferably selected from molybdenum dithiocarbamates (MoDTC) , molybdenum dithiophosphates (MoDTP) , molybdenum amines, molybdenum alcoholates, molybdenum alcohol- amides, and mixtures thereof.
  • MoDTC molybdenum dithiocarbamates
  • MoDTP molybdenum dithiophosphates
  • molybdenum amines molybdenum alcoholates
  • molybdenum alcohol- amides molybdenum alcohol- amides
  • R is a C 2 to Cio straight chain or branched hydrocarbyl, preferably C 2 to Cio straight chain
  • hydrocarbyl even more preferably C 2 to C 6 straight chain hydrocarbyl, for example n-C 4 .
  • Another essential component of the lubricating compositions of the present invention is one or more fatty diamine salt.
  • Said fatty diamine salt is present from 0.2 wt% to 5 wt%, by weight of the lubricating composition, preferably, from 0.3 wt% to 3 wt% by weight of the lubricating composition, more preferably from 0.3 wt% to 2.0 wt% by weight of the lubricating composition.
  • fatty diamine relates to diamines of the formula II.
  • R 1 is a straight or branched, saturated or unsaturated C8-22 hydrocarbyl.
  • R 1 groups include, but are not limited to, coco alkyl, oleyl and tallow alkyl, rapeseed alkyl, soya alkyl, hexadecyl, tetradecyl, and mixtures thereof, and other fatty hydrocarbyl groups of vegetable or animal origin.
  • R 2 groups include, but are not limited to, ethylene, propylene, butylene, pentylene and
  • R 2 is propylene, i.e. x is 3.
  • the fatty diamine salt is a carboxylate salt, i.e. the carboxylic acid salt of a fatty diamine.
  • the carboxylate salt of a fatty diamine is typically a dicarboxylate salt.
  • carboxylic acids contemplated for use in the present invention includes, but are not limited to carboxylic acids of the formula R 3 —COOH, where R 3 is a linear, branched or cyclic Cl-6 hydrocarbyl group, preferably a linear or branched Cl-5 alkyl group.
  • R 3 is a linear, branched or cyclic Cl-6 hydrocarbyl group, preferably a linear or branched Cl-5 alkyl group.
  • carboxylates i.e. acetates and propionates
  • the total amount of base oil incorporated in the lubricating oil composition of the present invention is preferably present in an amount in the range of from 60 to 92 wt%, more preferably in an amount in the range of from 75 to 90 wt% and most preferably in an amount in the range of from 75 to 88 wt%, with respect to the total weight of the lubricating oil composition.
  • base oil used in the present invention there are no particular limitations regarding the base oil used in the present invention, and various conventional known mineral oils and synthetic oils may be conveniently used.
  • the base oil used in the present invention may conveniently comprise mixtures of one or more mineral oils and/or one or more synthetic oils.
  • Mineral oils include liquid petroleum oils and solvent-treated or acid-treated mineral lubricating oils of the paraffinic, naphthenic, or mixed
  • paraffinic/naphthenic type which may be further refined by hydrofinishing processes and/or dewaxing.
  • Naphthenic base oils have low viscosity index (VI) (generally 40-80) and a low pour point.
  • Such base oils are produced from feed stocks rich in naphthenes and low in wax content and are used mainly for lubricants in which colour and colour stability are important, and VI and oxidation stability are of secondary importance.
  • Paraffinic base oils have higher VI (generally >95) and a high pour point. Said base oils are produced from feed stocks rich in paraffins, and are used for
  • Fischer-Tropsch derived base oils may be
  • the base oil in the lubricating oil composition of the present invention for example, the Fischer-Tropsch derived base oils disclosed in EP0776959, EP0668342, W09721788, W00015736, W00014188, W00014187, 00014183, W00014179, W00008115, W09941332, EP1029029, WO0118156 and WO0157166.
  • Synthetic processes enable molecules to be built from simpler substances or to have their structures modified to give the precise properties required.
  • hydrocarbon base oils sold by the Royal Dutch/Shell Group of Companies under the designation "XHVI” (trade mark) may be conveniently used.
  • the base oil comprises mineral oils and/or synthetic oils which contain more than 80% wt of saturates, preferably more than 90 wt%, as measured according to ASTM D2007.
  • the base oil contains less than 1.0 wt%, preferably less than 0.1 wt% of sulphur, calculated as elemental sulphur and measured according to ASTM D2622, ASTM D4294, ASTM D4927 or ASTM D3120.
  • the viscosity index of the base oil is more than 80, more preferably more than 120, as measured according to ASTM D2270.
  • the lubricating oil composition has a kinematic viscosity in the range of from 2 to 80 mm 2 /s at 100 °C, more preferably of from 3 to 70 m 2 /s, most preferably of from 4 to 50 mm 2 /s.
  • the total amount of phosphorus in the lubricating oil composition of the present invention is preferably in the range of from 0.04 to 0.12 wt%, more preferably in the range of from 0.04 to 0.09 wt% and most preferably in the range of from 0.045 to 0.08 wt%, based on total weight of the lubricating oil composition.
  • the lubricating oil composition of the present invention preferably has a sulphated ash content of not greater than 2.0 wt%, more preferably not greater than 1.0 wt% and most preferably not greater than 0.8 wt%, based on the total weight of the lubricating oil
  • the lubricating oil composition of the present invention preferably has a sulphur content of not greater than 1.2 wt%, more preferably not greater than 0.8 wt% and most preferably not greater than 0.2 wt%, based on the total weight of the lubricating oil composition.
  • the lubricating oil composition of the present invention may further comprise additional additives such as anti-oxidants, anti-wear additives, detergents, dispersants, additional friction modifiers, viscosity index improvers, pour point depressants, corrosion
  • Antioxidants that may be conveniently used include those selected from the group of aminic antioxidants and/or phenolic antioxidants.
  • said antioxidants are present in an amount in the range of from 0.1 to 5.0 wt%, more preferably in an amount in the range of from 0.3 to 3.0 wt%, and most preferably in an amount in the range of from 0.5 to 1.5 wt%, based on the total weight of the lubricating oil composition.
  • alkylated diphenylamines phenyl-a-naphthylamines, phenyl-p-naphthylamines and alkylated a-naphthylamines .
  • Preferred aminic antioxidants include
  • dialkyldiphenylamines such as p, p ' -dioctyl-diphenylamine, p, p ' -di-a-methylbenzyl-diphenylamine and N-p-butylphenyl- N-p ' -octylphenylamine, monoalkyldiphenylamines such as ono-t-butyldiphenylamine and mono-octyldiphenylamine, bis (dialkylphenyl) amines such as di-(2,4- diethylphenyl) amine and di (2-ethyl-4-nonylphenyl) amine, alkylphenyl-l-naphthylamines such as octylphenyl-1- naphthylamine and n-t-dodecylphenyl-l-naphthylamine, 1- naphthylamine, arylna
  • phenylenediamines such as N, N ' -diisopropyl-p- phenylenediamine and N, N ' -diphenyl-p-phenylenediamine, and phenothiazines such as phenothiazine and 3,7- dioctylphenothiazine .
  • Preferred aminic antioxidants include those available under the following trade designations: “Sonoflex OD-3” (ex. Seiko Kagaku Co.), “Irganox L-57” (ex. Ciba).
  • phenolic antioxidants which may be conveniently used include C7-C9 branched alkyl esters of 3, 5-bis (1, 1-dimethyl-ethyl) -4-hydroxy-benzenepropanoic acid, 2-t-butylphenol, 2-t-butyl-4-methylphenol, 2-t- butyl-5-methylphenol, 2, 4-di-t-butylphenol, 2,4-dimethyl- 6-t-butylphenol, 2-t-butyl-4-methoxyphenol, 3-t-butyl-4- methoxyphenol, 2, 5-di-t-butylhydroquinone, 2 , 6-di-t-butyl- 4-alkylphenols such as 2, 6-di-t-butylphenol, 2,6-di-t- butyl-4-methylphenol and 2, 6-di-t-butyl-4-ethylphenol,
  • 2.6-di-t-butyl-4-alkoxyphenols such as 2 , 6-di-t-butyl-4- methoxyphenol and 2, 6-di-t ⁇ butyl-4-ethoxyphenol, 3,5-di-t- butyl-4-hydroxybenzylmercaptooctylacetate, alkyl-3- (3,5- di-t-butyl-4-hydroxyphenyl) propionates such as n- octadecyl-3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate, n- butyl-3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate and 2'- ethylhexyl-3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate,
  • 2,2' -methylene- bis (4-alkyl-6-t-butylphenol) such as 2 , 2 ' -methylenebis ( 4- methyl-6-t-butylphenol, and 2, 2-methylenebis (4-ethyl-6-t- butylphenol) , bisphenols such as 4 , 4 ' -butylidenebis ( 3- methyl-6-t-butylphenol, 4,4' -methylenebis (2, 6-di-t- butylphenol) , , 4 ' -bis (2, 6-di-t-butylphenol) , 2,2-(di-p- hydroxyphenyl) propane, 2, 2-bis (3, 5-di-t-butyl-4- hydroxyphenyl) propane, 4,4' -cyclohexylidenebis (2, 6-t- butylphenol) , hexamethyleneglycol-bis [3-
  • Preferred phenolic antioxidants include those
  • the lubricating oil composition of the present invention may comprise mixtures of one or more phenolic antioxidants with one or more aminic antioxidants.
  • the lubricating oil composition may comprise a single zinc dithiophosphate or a combination of two or more zinc dithiophosphates as anti-wear additives, the or each zinc dithiophosphate being selected from zinc dialkyl-, diaryl- or alkylaryl- dithiophosphates .
  • Zinc dithiophosphate is a well known additive in the art and may be conveniently represented by general formula III;
  • R 4 to R 7 may be the same or different and are each a primary alkyl group containing from 1 to 20 carbon atoms preferably from 3 to 12 carbon atoms, a secondary alkyl group containing from 3 to 20 carbon atoms, preferably from 3 to 12 carbon atoms, an aryl group or an aryl group substituted with an alkyl group, said alkyl substituent containing from 1 to 20 carbon atoms
  • Zinc dithiophosphate compounds in which R 4 to R 7 are all different from each other can be used alone or in admixture with zinc dithiophosphate compounds in which R 4 to R 7 are all the same.
  • the or each zinc dithiophosphate used in the present invention is a zinc dialkyl dithiophosphate.
  • Examples of suitable zinc dithiophosphates which are commercially available include those available ex.
  • dithiophosphates such as those available ex. Lubrizol Corporation under the trade designations “Lz 1370” and “Lz 1373” and that available ex. Chevron Oronite under the trade designation "OLOA 260”.
  • the lubricating oil composition according to the present invention may generally comprise in the range of from 0.4 to 1.2 wt% of zinc dithiophosphate, based on the total weight of the lubricating oil composition. Additional or alternative anti-wear additives may be conveniently used in the composition of the present invention .
  • lubricating oil of the present invention include one or more salicylate and/or phenate and/or sulphonate
  • metal organic and inorganic base salts which are used as detergents can contribute to the sulphated ash content of a lubricating oil composition, in a preferred embodiment of the present invention, the amounts of such additives are minimised.
  • salicylate detergents can be used.
  • the lubricating oil is a lubricating oil
  • composition of the present invention may comprise one or more salicylate detergents.
  • said detergents are preferably used in amounts in the range of 0.05 to 20.0 wt%, more preferably from 1.0 to 10.0 wt% and most preferably in the range of from 2.0 to 5.0 wt%, based on the total weight of the lubricating oil composition.
  • said detergents independently, have a TEN (total base number) value in the range of from 10 to 500 mg.KOH/g, more preferably in the range of from 30 to 350 mg.KOH/g and most preferably in the range of from 50 to 300 mg.KOH/g, as measured by ISO 3771.
  • TEN total base number
  • the lubricating oil compositions of the present invention may additionally contain an ash-free dispersant which is preferably admixed in an amount in the range of from 5 to 15 wt%, based on the total weight of the lubricating oil composition.
  • ash-free dispersants examples include the polyalkenyl succinimides and polyalkenyl succininic acid esters disclosed in JP1367796, JP1667140, JP1302811 and JP1743435.
  • Preferred dispersants include borated succinimides .
  • viscosity index improvers which may be conveniently used in the lubricating oil composition of the present invention include the styrene-butadiene copolymers, styrene-isoprene stellate copolymers and the polymethacrylate copolymer and ethylene-propylene
  • Such viscosity index improvers may be conveniently employed in an amount in the range of from 1 to 20 wt%, based on the total weight of the lubricating oil composition.
  • Polymethacrylates may be conveniently employed in the lubricating oil compositions of the present invention as effective pour point depressants.
  • polycyclohexane and polyacrylates may be conveniently used in the lubricating oil composition of the present
  • seal fix or seal compatibility agents include, for example,
  • inventions may be conveniently prepared using conventional formulation techniques by admixing base oil with the organo-molybdenum compound and fatty diamine salt friction reducing additive together with and one or more other optional additives at a temperature of 60°C.
  • a method of lubricating an internal combustion engine comprising applying a lubricating oil composition as hereinbefore described thereto.
  • the present invention further provides the use of a lubricating composition as described herein for reducing friction .
  • the present invention further provides the use of a lubricating composition as described herein for reducing wear.
  • the present invention further provides the use of a lubricating composition as described herein for improving fuel economy.
  • a lubricating composition was formulated using conventional lubricant blending procedures ("Baseline Oil A”) having the composition set out in Table 1 below.
  • Fischer-Tropsch derived base oils having a kinematic viscosity at 100°C (ASTM D445) of approximately 4 cSt and 3 cSt, respectively, which may be conveniently prepared by the process described in W002070631.
  • polyisobutylene succinimide dispersant zinc alkyl dithiophosphate , overbased calcium alkyl salicylate detergent, borated dispersant and diphenylamine
  • Baseline Oil A had a kVIOO (as measured according to ASTM D445) of 8.02 mm 2 /s, a kV40 (as measured according to ASTM D445) of 35.18 mm 2 /s, a CCS at -35°C (as measured according to ASTM D5293) of 4330 mPa.s, and an HTHS (as measured according to ASTM D4741) of 2.74 mPa.s.
  • Baseline Oil A were FM165, a molybdenum
  • dialkylthiocarbamate commercially available from Adeka
  • a fatty diamine friction reducing additive Duomeen TDO commercially available from AkzoNobel
  • other amine friction modifiers e.g. Ethomeen, a fatty monoamine salt, commercially available from AkzoNobel
  • MTM Mini-Traction Machine
  • the MTM Test was described by R.I. Taylor, E.
  • Friction coefficients were measured with the Mini- Traction Machine using the 'ball-on-disc' configuration.
  • the ball specimen was a polished steel ball bearing, 19.05 mm in diameter.
  • the disc specimen was secured concentrically on a motor driven shaft.
  • the disc specimen was secured concentrically on another motor driven shaft.
  • the ball was loaded against the disc to create a point contact area with minimum spin and skew components. At the point of contact, a slide to roll ratio of 100% was maintained by adjusting the surface speed of the ball and disc .
  • Friction coefficients of the relevant Test Oils were measured and the results are detailed in Table 2 below.
  • the boundary friction coefficient is the averaged value at the low speeds from 0.05 m/s to 0.05 m/s
  • the mixed friction coefficient is the averaged value at the higher speeds from 1.0 m/s to 2.6 m/s .
  • Figure 1 shows a plot of friction coefficient
  • Lubrication regimes fall into four main categories: (1) Hydrodynamic, where the surfaces are completely separated by a fluid film, (2) Elastohydrodynamic, where the surfaces are separated by a very thin fluid film (3) Mixed, where the surfaces are partially separated with some asperity contact and (4) Boundary, where the
  • Molybdenum containing friction modifiers are:
  • organo-molybdenum compound at a lower level (90ppm, 0.2wt%) is combined with 0.5 wt% of a diamine salt, significant synergistic improvements in both boundary friction and mixed friction are seen.

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

Abstract

L'invention concerne une composition lubrifiante destinée à être utilisée dans le carter d'un moteur. Ladite composition comprend (i) une huile de base; (ii) un ou plusieurs composés organo-molybdène à un niveau suffisant pour fournir de 50 à 500 ppm en poids de molybdène; et (iii) de 0,2 % à 5 % en poids, dans le poids de la composition lubrifiante, d'un ou plusieurs sels de diamine grasse. La composition lubrifiante apporte des améliorations en termes de réduction du frottement et de l'usure, en plus d'une meilleure performance en termes d'économie de carburant.
PCT/EP2019/067912 2018-07-05 2019-07-03 Composition lubrifiante Ceased WO2020007945A1 (fr)

Applications Claiming Priority (2)

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US201862694246P 2018-07-05 2018-07-05
US62/694,246 2018-07-05

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WO2020007945A1 true WO2020007945A1 (fr) 2020-01-09

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Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4581039A (en) * 1983-09-23 1986-04-08 Mobil Oil Corporation Diamine carboxylates and lubricant and fuel compositions containing same
EP0668342A1 (fr) 1994-02-08 1995-08-23 Shell Internationale Researchmaatschappij B.V. Procédé de préparation d'une huile lubrifiante de base
EP0776959A2 (fr) 1995-11-28 1997-06-04 Shell Internationale Researchmaatschappij B.V. Procédé pour la production d'huiles lubrifiantes
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