EP2844724B1 - Composition lubrifiante pour moteur - Google Patents

Composition lubrifiante pour moteur Download PDF

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Publication number
EP2844724B1
EP2844724B1 EP13721663.6A EP13721663A EP2844724B1 EP 2844724 B1 EP2844724 B1 EP 2844724B1 EP 13721663 A EP13721663 A EP 13721663A EP 2844724 B1 EP2844724 B1 EP 2844724B1
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EP
European Patent Office
Prior art keywords
mass
polyalkylene glycol
ranging
lubricant composition
carbon atoms
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EP13721663.6A
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German (de)
English (en)
French (fr)
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EP2844724A1 (fr
Inventor
Julien Guerin
Nicolas Obrecht
Nadjet Khelidj
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TotalEnergies Marketing Services SA
Dow Global Technologies LLC
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Total Marketing Services SA
Dow Global Technologies LLC
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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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • 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
    • C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
    • 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/32—Polyoxyalkylenes of alkylene oxides containing 4 or more 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/34—Polyoxyalkylenes of two or more specified different types
    • 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • 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
    • C10M157/00—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions 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
    • 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
    • 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
    • C10M2205/022—Ethene
    • 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
    • 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
    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
    • 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
    • C10M2207/26—Overbased carboxylic acid salts
    • C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
    • 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
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • 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
    • C10M2215/28—Amides; Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; 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
    • C10N2030/04—Detergent property or dispersant property
    • 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
    • C10N2040/252—Diesel engines
    • 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
    • C10N2040/252—Diesel engines
    • C10N2040/253—Small diesel engines
    • 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
    • C10N2040/255—Gasoline engines

Definitions

  • the present invention relates to lubricating compositions for engines, in particular for gasoline vehicle or diesel vehicle engines, the use of which simultaneously makes it possible to obtain satisfactory engine cleanliness and a reduction in the fuel consumption of said vehicles.
  • An objective of the present invention is the use of novel additive compounds in a lubricating composition making it possible to formulate a lubricating composition which has good properties in terms of engine cleanliness.
  • This objective is achieved by using at least one polyalkylene glycol, obtained by polymerization or copolymerization of alkylene oxides comprising from 3 to 8 carbon atoms, including at least one butylene oxide in a lubricating composition.
  • the applicant company has observed that the use of these polyalkylene glycols as an additive advantageously makes it possible to obtain a lubricating composition exhibiting good properties with regard to engine cleanliness.
  • Another objective of the present invention is the formulation of a lubricating composition simultaneously exhibiting good engine cleanliness properties and good Fuel Eco properties.
  • a lubricating composition for an engine in particular a gasoline engine or a diesel engine, comprising a specific combination.
  • a polyalkylene glycol obtained by polymerization or copolymerization of alkylene oxides including at least one butylene oxide and at least one polymer improving the viscosity index.
  • this document does not describe a lubricating composition
  • a lubricating composition comprising at least one polyalkylene glycol which is a copolymer of butylene oxide and of propylene oxide in which the mass ratio of butylene oxide to propylene oxide is selected from the range of values of the present invention.
  • this document does not describe the use of a particular polyalkylene glycol for improving engine cleanliness, without increasing the consumption of gasoline or diesel fuel.
  • EP0438709 describes an engine oil comprising at least one base oil, at least one viscosity index improving polymer and at least one product resulting from the reaction of alkylphenols or bisphenol A with at least one butylene oxide or one oxide of butylene / propylene to improve the cleanliness of the pistons of automotive engines.
  • this document does not describe the lubricating compositions according to the invention. It also does not describe the use of polyalkylene glycols as defined. according to the invention in a lubricating composition for improving engine cleanliness and reducing fuel consumption.
  • the amount of polyalkylene glycol in the lubricating composition must be limited between 1 and 30% by mass, relative to the total mass of the lubricating composition, terminal 30 % being excluded.
  • the polyalkylene glycol has a molar mass measured according to the ASTM D4274 standard ranging from 500 to 750 grams per mole.
  • the polyalkylene glycol has a kinematic viscosity at 100 ° C. measured according to the ASTM D445 standard of 1 to 12 cSt, preferably 3 to 7 cSt, more preferably of 3.5 to 6.5 cSt.
  • the lubricating composition comprises from 2 to 20% by mass of polyalkylene glycol, relative to the total mass of the lubricating composition, preferably from 3 to 15%, even more preferably from 5 to 12%, even more preferably from 6 to 10%.
  • the polymer improving the viscosity index is chosen from the group consisting of olefin copolymers, copolymers of ethylene and of alpha-olefin, copolymers of styrene and of olefin, polyacrylates taken alone or as a mixture. .
  • the lubricating composition comprises from 1 to 15% by mass of polymer improving the viscosity index, relative to the total mass of the lubricating composition, preferably from 2 to 10%, more preferably from 3 to 8%.
  • the lubricating composition further comprises at least one additive chosen from antiwear additives, detergents, dispersants, antioxidants, friction modifiers taken alone or as a mixture.
  • the invention also relates to the use of a lubricating composition as defined above for lubricating an engine of light or heavy-duty vehicles, preferably light gasoline or diesel vehicles.
  • the invention also relates to the use of at least one polyalkylene glycol as described above in a lubricating composition for improving engine cleanliness, without increasing the consumption of gasoline or diesel fuel, preferably for improving engine cleanliness by reducing gasoline or diesel fuel consumption.
  • this use aims to improve the cleanliness of the engine, in particular the cleanliness of the pistons.
  • Another subject of the invention is a method of lubricating at least one mechanical part of an engine, said method comprising at least one step in which said mechanical part is brought into contact with at least one lubricating composition as defined herein. -above.
  • the term “improvement in engine cleanliness” is understood to mean: reduction of the formation of deposits, in particular the formation of deposits at high temperature such as varnishes, lacquers or carbon or coke deposits which form on hot surfaces of engine parts such as piston grooves, turbo shafts.
  • the molecules of the lubricating compositions can oxidize on contact with the hot surfaces of the engine and generate the formation of insoluble products forming deposits. These deposits will clog the engine and cause problems of wear, seizure, gumming of the segments, turbo rotation problems for example.
  • detergent type additives are used to improve engine cleanliness.
  • the applicant company proposes to use another type of additive to improve engine cleanliness.
  • the lubricating composition according to the invention makes it possible to solve the problems of engine cleanliness, in particular this formation of deposits.
  • polyalkylene glycols of the compositions according to the invention have properties suitable for use in an engine oil. These are polymers or copolymers (random or block) of alkylene oxides, which can be prepared according to the known methods described in the application. WO 2009/134716 , page 2 line 26 to page 4 line 12, for example by attacking an alcohol initiator on the epoxy bond of an alkylene oxide and propagating the reaction.
  • At least one of the alkylene oxides entering into the structure of these PAGs is a butylene oxide, said butylene oxide being 1,2-butylene oxide or 2,3-butylene oxide, preferably 1,2-butylene oxide.
  • the PAGs obtained, in part or in whole, from ethylene oxide do not exhibit sufficient lipophilicity to be used in engine oil formulas. In particular, they cannot be used in combination with other mineral, synthetic or natural base oils.
  • alkylene oxides comprising more than 8 carbon atoms is also not desired because, to produce bases having the molar mass and therefore the target viscometer grade for engine applications, there will then be a number of reduced monomers (low n in formula (A) above), with long R 2x-1 and R 2x side chains. This is detrimental to the overall linear character of the PAG molecule and leads to viscosity indices (VI) which are too low for application in engine oil.
  • the viscosity index VI (measured according to the NFT 60136 standard) of the PAGs according to the invention is greater than or equal to 100, preferably greater than or equal to 120.
  • the PAGs according to the invention are obtained. from alkylene oxides comprising at least one butylene oxide.
  • the copolymers of butylene oxide (BO) and of propylene oxide (PO) are particularly preferred, since they exhibit both the good tribological and rheological properties of the PAGs containing ethylene oxide units and / or polypropylene, and good solubility in conventional mineral, synthetic, and natural bases, and other oily compounds.
  • PAGs are prepared by reacting one or more alcohols with a mixture of butylene oxide and propylene oxide.
  • PAGs prepared with a mixture where this ratio is from 3: 1 to 1: 1 are particularly well miscible and soluble in base oils, including synthetic oils of group IV (polyalphaolefins).
  • the PAGs of the compositions according to the invention are prepared from alcohol comprising from 8 to 12 carbon atoms. 2-ethylhexanol and dodecanol, alone or as a mixture, and in particular dodecanol, are particularly preferred, since the PAGs prepared from these alcohols have very low tensile coefficients.
  • the AGPs according to the invention are such that their carbon to oxygen molar ratio is greater than 3: 1, preferably ranging from 3: 1 to 6: 1. This gives said PAG properties of polarity and viscosity index which are particularly suitable for use in engine oil.
  • the molar mass, measured according to the ASTM D2502 standard, of the AGPs according to the invention has a value preferably ranging from 300 to 1000 grams per mole (g / mol), preferably ranging from 350 to 600 g / mol (this is why they contain a limited number of alkylene oxide units n as described above in formula (A)).
  • the molar mass, measured according to the ASTM D4274 standard, of the AGPs according to the invention has a value preferably ranging from 300 to 1000 grams per mole (g / mol), preferably ranging from 500 to 750 g / mol.
  • KV100 kinematic viscosities at 100 ° C
  • the KV100 of the compositions is measured according to the ASTM D445 standard.
  • the use of light PAGs (KV100 approximately from 2 to 6.5 cSt) is preferably chosen to be able to more easily formulate multigrade oils of 5W or 0W cold grade according to the SAEJ300 classification, because the heavier PAGs have cold properties. (High CCS) that do not easily achieve these grades.
  • a lubricating composition for an engine in particular for a gasoline engine or for a diesel engine, comprising at least one base oil, at least one polymer improving the viscosity index as defined above and at least a polyalkylene glycol as defined above, the amount of polyalkylene glycol being from 1 to 28% by mass, relative to the total mass of lubricating composition.
  • An amount less than 1% by mass is insufficient to obtain a significant effect in terms of fuel savings and engine cleanliness.
  • an amount greater than or equal to 30% does not make it possible to obtain a significant effect in terms of engine cleanliness and fuel savings. From 30% by mass, the “Fuel-Eco” effects are less marked, or even degraded.
  • the lubricating compositions according to the invention comprise from 2 to 20% by mass of the polyalkylene glycols described above, relative to the total mass of lubricating composition, more preferably from 3 to 15%, even more preferably from 5 to 12%, even more preferably from 6 to 10%, with an optimum of around 8% by mass in terms of Fuel Eco properties and engine cleanliness.
  • the polymers used in the compositions according to the present invention are polymers which improve the viscosity index. These polymers are polymers well known to those skilled in the art and are chosen from the group consisting of copolymers of ethylene and of alpha-olefin, polyacrylates such as polymethacrylates, olefin copolymers (OCP), copolymers of ethylene propylene and a diene (Ethylene Propylene Diene Monomers (EPDM)), polybutenes, copolymers of styrene and olefin, hydrogenated or not, copolymers of styrene and acrylate.
  • polyacrylates such as polymethacrylates
  • OCP olefin copolymers
  • EPDM Ethylene Propylene Diene Monomers
  • the olefin copolymers are preferably copolymers of ethylene and propylene.
  • the quantity by weight of ethylene, relative to the total weight of copolymer varies from 20 to 80%, preferably from 30 to 70%, preferably around 50%.
  • the polyacrylates are preferably polymethacrylates, linear or comb, functionalized or non-functionalized.
  • functionalized polymethacrylates one also speaks of dispersing polymethacrylates, also denoted PAMAd, which are polymethacrylates grafted or functionalized for example by units of vinyl pyrrolidone type.
  • copolymers of styrene and of olefin are preferably copolymers of styrene and of butadiene or copolymers of styrene and of isoprene, hydrogenated or not, preferably hydrogenated, linear or star-shaped.
  • copolymers of hydrogenated styrene and isoprene are used.
  • copolymers of hydrogenated styrene and isoprene are used in admixture with polymethacrylates (PMA).
  • PMA polymethacrylates
  • the mass ratio between the copolymer of styrene and of hydrogenated isoprene and the polymethacrylate varies from 3: 1 to 1: 3, preferably is equal to 1: 1.
  • the lubricating compositions according to the invention comprise from 1 to 15% by mass of polymer improving the viscosity index, or mixture of polymers improving the viscosity index, relative to the total mass of lubricating composition, preferably from 2 to 10%, more preferably from 3 to 8%.
  • the lubricating compositions according to the present invention can comprise, in combination with the PAGs described above, one or more base oils, which can be oils of mineral or synthetic origin of groups I to V according to the classes defined in the classification. API (or their equivalents according to the ATIEL classification) as summarized below, alone or in mixture.
  • the base oil (s) used in the lubricating compositions according to the invention can be chosen from oils of synthetic origin from group VI according to the ATIEL classification.
  • Saturated content Sulfur content Viscosity index Group I Mineral oils ⁇ 90% > 0.03% 80 ⁇ VI ⁇ 120 Group II Hydrocracked oils ⁇ 90% ⁇ 0.03% 80 ⁇ VI ⁇ 120 Group III Hydrocracked or hydroisomerized oils ⁇ 90% ⁇ 0.03% ⁇ 120 Group IV Polyalphaolefins (PAO) Group V Esters and other bases not included in groups I to IV Group VI * (PIO) Internal polyolefins (in Anglo-Saxon term Poly Internai Olefins) * for ATIEL classification only
  • oils can be oils of vegetable, animal or mineral origin.
  • the mineral base oils of the compositions according to the invention include all types of bases obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, deasphalting, solvent dewaxing, hydrotreatment, hydrocracking and hydroisomerization, hydrofinishing.
  • the base oils of the compositions according to the present invention can also be synthetic oils, such as certain esters of carboxylic acids and alcohols, GTL bases which can be obtained by hydroisomerization of a Fisher-Tropsch wax, or polyalphaolefins.
  • the polyalphaolefins used as base oils are for example obtained from monomers having from 4 to 32 carbon atoms (for example octene, decene), and have a viscosity at 100 ° C of between 1.5 and 15 cSt. Their weight average molecular mass is typically between 250 and 3000.
  • the lubricating compositions according to the present invention have a kinematic viscosity at 100 ° C of between 5.6 and 16.3 cSt measured by standard ASTM D445, (grade SAE 20, 30 and 40), preferably between 9, 3 and 12.5 cSt (grade 30).
  • the compositions according to the present invention are multigrade oils, of grade 5W or 0W according to the SAEJ300 classification.
  • compositions according to the present invention also preferably have a viscosity index (VI) greater than 130, preferably greater than 150, preferably greater than 160 (measured according to the ASTM D2270 standard).
  • VI viscosity index
  • the lubricating compositions according to the invention comprise from 40 to 80% by mass of base oil, relative to the total mass of lubricating composition, preferably from 50 to 75% by mass, more preferably from 60 to 70%.
  • the lubricating compositions according to the invention can also contain all types of additives suitable for their use, in particular as engine oil, preferably motor oil.
  • Another subject of the invention is a method of lubricating at least one mechanical part of an engine comprising at least one step in which said mechanical part is brought into contact with at least one lubricating composition as defined above.
  • These parts are in particular the pistons.
  • the method according to the invention makes it possible to simultaneously obtain satisfactory engine cleanliness and a reduction in the fuel consumption of said vehicles.
  • the “Fuel Eco” gain of the lubricating compositions T 1 , L 1 and L 2 is then measured on a DW10C engine test.
  • the conditions for this test are as follows: Different engine speed and load conditions are scanned during which specific fuel consumption is measured. The speed range extends from 1000 to 2400 rpm. The engine load range extends from 16 to 190 Nm The engine oil and coolant are stabilized at different temperatures (45 ° C, 60 ° C and 75 ° C) to ensure good repeatability of the engine. measured. For each point, we compare the specific fuel consumption between the lubricant to be tested and a 5W-30 reference oil. A weighted average makes it possible to express as a percentage the overall gain provided by the test lubricant compared to the reference. The gains in fuel consumption of the lubricating compositions T 1 , L 1 and L 2 are given in Table II, expressed as a percentage relative to a reference oil of grade 5W-30.
  • the cleanliness of the engine is also measured by means of the Panel Coking Test (PCT) laboratory test, the experimental conditions of which are below:
  • PCT Panel Coking Test
  • the lubricant to be tested flows over an inclined metal plate heated to 288 ° C with a flow rate of 1 ml / min.
  • the volume of oil of 100 mL circulates in a closed circuit on this plate by means of a pump for a test period of 24 hours.
  • the plate is rinsed with a solvent and the varnishes and carbon deposits deposited on the casting. are rated using a Coordinating Research Council (CRC) rating method.
  • CRC Coordinating Research Council
  • the cleanliness of the engine is also measured by means of the TDi engine test according to the CEC L-78-99 method, which measures in particular the cleanliness of the pistons.
  • a control composition T 2 and compositions C 1 to C 4 are prepared from the same constituents as above, but with another polyalkylene glycol: a PAG BO / PO having a 50/50 mass ratio, of KV100 equal to 4 cSt (measured according to standard ASTM D445) and of molar mass equal to 505 g / mol (measured according to standard ASTM D4274).
  • a PAG BO / PO having a 50/50 mass ratio, of KV100 equal to 4 cSt (measured according to standard ASTM D445) and of molar mass equal to 505 g / mol (measured according to standard ASTM D4274).
  • the “Fuel Eco” gain of the lubricating compositions T 2 , C 1 to C 4 is then measured on a DW10C driven engine test.
  • the conditions for this test are as follows: The engine is driven by means of a generator making it possible to impose a speed of rotation between 750 and 3000 revolutions / min while a torque sensor makes it possible to measure the frictional torque generated by the movement of parts in the engine. Engine oil and coolant are stabilized at different temperatures (35 ° C, 50 ° C, 80 ° C and 115 ° C) to ensure good repeatability of the measurement. The frictional torque induced by the test lubricant is compared for each speed and temperature to the torque induced by the reference grade 5W-30 lubricant.
  • the final result obtained by the test lubricant is obtained by the average of the gains on each operating point expressed in relation to the reference lubricant.
  • a gain positive means that the engine rubs less and that the lubricant used will reduce fuel consumption.
  • Table III T 2 C 1 C 2 C 3 C 4 Mixture of group III base oils 83.1 78.9 74.9 67.9 52.8 Additive package 10.9 10.9 10.9 10.9 MoDTC 0.5 0.5 0.5 0.5 0.5 SIH 2.8 2.9 2.9 2.9 2.9 PAMA 2.7 2.8 2.8 2.8 2.9 2.9 PAG PO / BO - 4 8 15 30 Total 100 100 100 100 100 100 100 100 KV100 (1) 9.96 9.86 9.85 9.95 9.79 KV40 (1) 50.43 51.50 51.31 51.46 49.84 Viscosity index (VI) (2) 189 181 181 184 187 HTHS (3 3.09 2.98 3.03 3.06 3.07 Average FE gain 2.2 2.4 3.1 2.1 1.9 (1) ISO 3104 (2) ISO 2909

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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)
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FR1254152A FR2990215B1 (fr) 2012-05-04 2012-05-04 Composition lubrifiante pour moteur
PCT/EP2013/059254 WO2013164449A1 (fr) 2012-05-04 2013-05-03 Composition lubrifiante pour moteur

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FR3030570B1 (fr) * 2014-12-23 2018-08-31 Total Marketing Services Composition lubrifiante a materiau a changement de phase
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RU2638542C2 (ru) 2017-12-14
US20150119303A1 (en) 2015-04-30
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MX2014013432A (es) 2015-04-14
US9957462B2 (en) 2018-05-01
FR2990215A1 (fr) 2013-11-08
IN2014DN09778A (ru) 2015-07-31
JP2015516006A (ja) 2015-06-04
KR20150020534A (ko) 2015-02-26
AR092003A1 (es) 2015-03-18
KR102081255B1 (ko) 2020-02-25
WO2013164449A1 (fr) 2013-11-07
CN104364357A (zh) 2015-02-18
RU2014147246A (ru) 2016-06-27
FR2990215B1 (fr) 2015-05-01
CA2871094A1 (fr) 2013-11-07
MX358777B (es) 2018-09-04
EP2844724A1 (fr) 2015-03-11
JP6306570B2 (ja) 2018-04-04

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