EP4274879A1 - Composition lubrifiante ayant une stabilité à froid et des propriétés fuel eco améliorées - Google Patents
Composition lubrifiante ayant une stabilité à froid et des propriétés fuel eco amélioréesInfo
- Publication number
- EP4274879A1 EP4274879A1 EP22700059.3A EP22700059A EP4274879A1 EP 4274879 A1 EP4274879 A1 EP 4274879A1 EP 22700059 A EP22700059 A EP 22700059A EP 4274879 A1 EP4274879 A1 EP 4274879A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating composition
- weight
- group
- relative
- meth
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
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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
- 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
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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
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/16—Amides; Imides
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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
- C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M145/10—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
- C10M145/12—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 monocarboxylic
- C10M145/14—Acrylate; Methacrylate
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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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/08—Amides [having hydrocarbon substituents containing less than thirty carbon atoms]
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/086—Imides [having hydrocarbon substituents containing less than thirty carbon atoms]
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
- C10M2215/28—Amides; Imides
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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
- 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
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/06—Groups 3 or 13
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/04—Detergent property or dispersant property
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/54—Fuel economy
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
- C10N2060/14—Chemical after-treatment of the constituents of the lubricating composition by boron or a compound containing boron
Definitions
- Lubricating composition having cold stability and improved fuel eco properties
- the invention relates to the field of lubricating compositions, in particular the fuel economy properties also referred to by the expression fuel economy (FE or fuel eco) and cold stability of the lubricating compositions.
- the invention relates to the combined use of at least one molybdenum friction modifier, at least one boron dispersant and at least one copolymer of the (meth)acrylate type to improve the properties of fuel economy (FE or fuel eco) and cold stability of a lubricating composition also comprising at least one base oil.
- High performance lubricating compositions must therefore possess improved properties, in particular with regard to kinematic viscosity, viscosity index, volatility, dynamic viscosity or cold pour point.
- Thermal stability and resistance to oxidation are also properties to be improved for high performance lubricating compositions.
- An essential requirement of engine lubricating compositions relates to environmental aspects. It has in fact become essential to reduce the consumption of lubricating compositions as well as fuel consumption, in particular with the aim of reducing CO 2 emissions.
- the invention relates first of all to a lubricating composition
- a lubricating composition comprising:
- At least one friction modifier comprising molybdenum such that the amount of molybdenum element in the lubricating composition ranges from 100 ppm to 1500 ppm by weight, relative to the total weight of the lubricating composition,
- boron dispersant such that the amount of boron element in the lubricating composition ranges from 10 ppm to 300 ppm, relative to the total weight of the lubricating composition
- R1 represents a hydrogen atom or a methyl group
- - X1 represents a group chosen from: -O-, -0(A0)m, or -NH-, each group A independently representing a C2-C4 alkylene group and m an integer ranging from 0 to 10,
- R2 is a polybutylene group
- the lubricating composition according to the invention comprises:
- boron dispersants from 0.01% to 10% by weight, relative to the total weight of the lubricating composition, of one or more boron dispersants, such that the amount of boron element in the lubricating composition ranges from 10 ppm to 300 ppm in weight, relative to the total weight of the lubricating composition,
- R3 represents a hydrogen atom or a methyl group
- - X2 represents an -O- or -NH- group
- R4 groups represent, independently, a C2-C4 alkylene group
- R5 represents a C1 -C8 alkyl group
- - q is an integer ranging from 1 to 20.
- the lubricating composition according to the invention comprises:
- the lubricating composition according to the invention has a kinematic viscosity at 100° C., measured according to the ASTM D445 standard, ranging from 3.8 mm 2 /s to 21.9 mm 2 /s.
- the friction modifier comprising molybdenum is an organomolybdenum compound, in particular a compound chosen from a molybdenum dithiocarbamate derivative (MoDTC), a molybdenum dithiophosphate derivative (MoDTP) or a sulfur-free molybdenum complex, preferably a derivative molybdenum dithiocarbamate (MoDTC).
- MoDTC molybdenum dithiocarbamate derivative
- MoDTP molybdenum dithiophosphate derivative
- sulfur-free molybdenum complex preferably a derivative molybdenum dithiocarbamate (MoDTC).
- the borated dispersant is chosen from borated succinimides, preferably from borated polyisobutene succinimides.
- a subject of the invention is also the use, in a lubricating composition comprising a base oil, one or more molybdenum friction modifiers and one or more boron dispersants, of a copolymer comprising repeating units capable of being obtained by polymerization of monomers (a) of formula (I): in which :
- R1 represents a hydrogen atom or a methyl group
- - X1 represents a group chosen from: -O-, -0(A0)m, or -NH-, each group A independently representing a C2-C4 alkylene group and m an integer ranging from 0 to 10,
- R2 is a polybutylene group
- the use of the copolymer according to the invention makes it possible to:
- the present invention relates firstly to a lubricating composition
- a lubricating composition comprising:
- At least one friction modifier comprising molybdenum such that the amount of molybdenum element in the lubricating composition ranges from 100 ppm to 1500 ppm by weight, relative to the total weight of the lubricating composition,
- boron dispersant such that the amount of boron element in the lubricating composition is from 10 ppm to 300 ppm, relative to the total weight of the lubricating composition
- R 1 represents a hydrogen atom or a methyl group
- X 1 represents a group chosen from: -O-, -0(A0) m , or -NH-, each group A independently representing a C2-C4 alkylene group and m an integer ranging from 0 to 10,
- R 2 is a polybutylene group, and p is equal to 0 or 1.
- the lubricating composition according to the invention comprises at least one polymer, in particular a copolymer, comprising repeating units capable of being obtained by polymerization of monomers (a) of formula (I): in which :
- R 1 represents a hydrogen atom or a methyl group
- X 1 represents a group chosen from: -O-, -0(A0) m , or -NH-, each group A independently representing a C2-C4 alkylene group and m an integer ranging from 0 to 10,
- R 2 is a polybutylene group, and p is equal to 0 or 1.
- the term “(meth)acrylate” designates a methacrylate or an acrylate.
- the term “(meth)acrylamide” designates a methacrylamide or an acrylamide.
- R 1 is a methyl group.
- C 2 -C 4 alkylene group mention may in particular be made of an ethylene group, a 1,2- or 1,3-propylene group or else a 1,2, 1,3- or 1,4- butylene.
- m is an integer ranging from 0 to 4, more preferably from 0 to 2.
- each A can be the same or different, and the fragments (AO) m can be linked randomly or in blocks.
- the group X 1 is a group -O- or -O(A0) m -, more preferably a group -O- or -O(CH 2 CH 2 0)-.
- R 2 is a polybutylene group.
- polybutylene group is meant within the meaning of the invention a group obtained by the elimination of a hydrogen atom from a hydrocarbon polymer containing, as essential structural unit, at least one type 1 monomer, 2 butylene or isobutylene.
- a hydrocarbon polymer suitable for the preparation of a polybutylene group R 2 mention may in particular be made of a copolymer comprising units derived from isobutene and/or from 1,2-butylene or even a polymer obtained by hydrogenation of the terminal double bond of a polybutadiene obtained by the 1,2 addition of buta-1,3-diene monomers.
- the hydrocarbon polymer can be a block polymer or a random polymer.
- the hydrocarbon-based polymer may also contain at least one structural unit distinct from the isobutylene or 1,2-butylene units.
- the hydrocarbon polymer may for example comprise one or more of the following units:
- this double bond can be partially or totally hydrogenated by hydrogenation.
- the isobutylene and 1,2-butylene units represent at least 30% by mole of the total number of structural units constituting the hydrocarbon polymer, preferably at least 40% by mole, preferably at least 50% by mole , preferably at least 60 mol%.
- the total number of butylene units (isobutylene and/or 1,2 butylene), relative to the total number of structural units of the hydrocarbon polymer, can be determined by analyzing the hydrocarbon polymer by 13 C nuclear magnetic resonance spectroscopy and using the following equation:
- the 13 C nuclear magnetic resonance spectrum shows a peak derived from an isobutylene methyl group at 30-32 ppm (integral value A), and a peak derived from a branched methylene group (-CH 2 -CH(CH 2 CH3)-) of 1,2-butylene at 26-27 ppm in integral value (integral value B).
- the total number of isobutylene and 1,2-butylene can be determined at from the integral values of the peaks and an integral value (integral value C) of the peaks of all the carbon atoms of the hydrocarbon polymer.
- the monomers (a) are typically obtained by esterification or amidation of a (co)polymer (Y) containing a hydroxyl group or an amine group.
- (co)polymers (Y) that is to say the (co)polymer containing a hydroxyl group or an amine group
- alkylene oxide (Y1) (co)polymers capable of being obtained by bringing an alkylene oxide into contact, for example ethylene oxide or propylene oxide, with a polymer selected from: (1) a hydrocarbon polymer obtained by the polymerization of an unsaturated aliphatic hydrocarbon; (2) an unsaturated alicyclic hydrocarbon; (3) an unsaturated aromatic hydrocarbon, in particular chosen from C2-C36 olefins; and their derivatives, in the presence of an ionic polymerization catalyst, for example a sodium catalyst.
- a polymer selected from: (1) a hydrocarbon polymer obtained by the polymerization of an unsaturated aliphatic hydrocarbon; (2) an unsaturated alicyclic hydrocarbon; (3) an unsaturated aromatic hydrocarbon, in particular chosen from C2-C36 olefins; and their derivatives, in the presence of an ionic polymerization catalyst, for example a sodium catalyst.
- the products obtained by hydroboration (Y2): (co)polymer capable of being obtained by the hydroboration of hydrocarbon polymers, in particular that described in US 4,316,973.
- Adducts of the maleic anhydride-ene-amine alcohol (Y3) type (co)polymers capable of being obtained by imidation of the product obtained by an Alder-ene reaction between a hydrocarbon polymer having a double bond and the anhydride maleic acid, in the presence of an amino alcohol.
- Products capable of being obtained by hydroformylation and hydrogenation (co)polymer(s) capable of being obtained by hydroformylation of a hydrocarbon polymer having a double bond, followed by a hydrogenation stage. Mention may be made, by way of example, of the products described in JP-A 63-175096.
- Maleic anhydride-ene-ethylenediamine (Y5) adducts (co)polymers capable of being obtained by imidation of a product obtained by an Alder-ene reaction between a hydrocarbon polymer having a double bond and the anhydride maleic, in the presence of ethylenediamine.
- the (co)polymer (Y) is chosen from (co)polymers (Y1), (Y2) and (Y3), more preferably from (co)polymers (Y) and (Y1).
- the number-average molecular weight (Mn) of each of the (co)polymers (Y) is preferably from 1,000 to 25,000 g. mol 1 , more preferably from 2,000 to 20,000 g. mol 1 , particularly preferably from 3000 to 15000 g. mol -1 , more preferably from 4000 to 10,000 g. mol -1 .
- the crystallization temperature of the (co)polymer (Y) is less than or equal to -40° C., more preferably less than or equal to -50° C., in particular less than or equal to -55° C., typically less than or equal to -60 °C.
- the crystallization temperature of the (co)polymer (Y) or of the (co)polymer (A) can be measured using a differential scanning calorimeter of the "Unix® DSC7" type (PerkinElmer). The crystallization temperature is measured during isothermal cooling of a sample (5 mg) of (co)polymer (Y) or (co)polymer (A) from 100°C to -80°C at a rate of 10 °C/min.
- the copolymer also comprises repeating units capable of being obtained by the polymerization of monomers (b) of formula (II): in which :
- R 3 is a hydrogen atom or a methyl group
- - X 2 is a group represented by -O- or -NH-;
- R 4 groups represent, independently, a C2-C4 alkylene group
- R 5 is a C Cs alkyl group
- - q is an integer ranging from 1 to 20.
- R 3 is a methyl group.
- X 2 is a -0- group.
- C 2 -C 4 alkylene groups mention may in particular be made of ethylene, isopropylene, 1,2- or 1,3-propylene, isobutylene and 1,2-, 1 ,3- or 1,4-butylene.
- q is equal to 1 or 2.
- each R 4 can be the same or different, and the fragments (R 4 0) q can be linked randomly or in blocks.
- CrCs alkyl groups mention may in particular be made of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, n-heptyl, isoheptyl, n-hexyl, 2-ethylhexyl , n-pentyl and n-octyl.
- C Cs alkyl groups preference will be given to C 1 -C 6 alkyl groups, more preferably C 1 -C 5 alkyl groups, typically C 4 alkyl groups.
- Examples of monomers (b) include methoxypropyl (meth)acrylate, methoxybutyl (meth)acrylate, methoxyheptyl (meth)acrylate, methoxyhexyl (meth)acrylate, methoxybutyl (meth)acrylate, methoxypentyl, methoxyoctyl (meth)acrylate, ethoxyethyl (meth)acrylate, ethoxypropyl (meth)acrylate, ethoxybutyl (meth)acrylate, ethoxyheptyl (meth)acrylate, ethoxyhexyl (meth)acrylate , ethoxypentyl (meth)acrylate, ethoxyoctyl (meth)acrylate, propoxymethyl (meth)acrylate, propoxyethyl (meth)acrylate, propoxypropyl (meth)acrylate, propoxybutyl (meth)acrylate, propoxyhept
- the monomers (b) are chosen from ethoxyethyl (meth)acrylate and butoxyethyl (meth)acrylate.
- the monomers (b) are distinct from the monomers (a).
- the copolymer of the invention may also comprise, in addition to the units derived from the monomers (a) and (b), additional repeating units capable of being obtained by the polymerization of monomers chosen from:
- monomers (c) mention may in particular be made of: methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate and butyl (meth)acrylate.
- the monomers (C) are chosen from methyl (meth)acrylate and butyl (meth)acrylate, more preferably from butyl (meth)acrylates.
- n-dodecyl (meth)acrylate n-tridecyl (meth)acrylate, n-tetradecyl (meth)acrylate, (meth) n-pentadecyl acrylate, n-hexadecyl (meth)acrylate, n-octadecyl (meth)acrylate, n-icosyl (meth)acrylate, n-tetracosyl (meth)acrylate, n-triacontyl (meth)acrylate and n-hexatriacontyl (meth)acrylate.
- the monomers (d) are chosen from alkyl (meth)acrylates having a linear C12-C28 alkyl group, more preferably from alkyl (meth)acrylates having a linear C12-C22 alkyl group.
- the (co)polymer of the invention may also contain repeating units capable of being obtained by the polymerization of monomers (e) represented by the following formula (NI): in which :
- R 6 is a hydrogen atom or a methyl group
- - X 3 is an -O- or -NH- group
- R 7 groups represent, independently, a C2-C4 alkylene group
- R 8 and R 9 independently represent a linear C4-C24 alkyl group
- - r is an integer ranging from 0 to 20.
- R 6 is a methyl group.
- X 3 is a -0- group.
- C2-C4 alkylene groups mention may in particular be made of ethylene, isopropylene, 1,2- or 1,3-propylene, isobutylene and 1,2-, 1, 3- or 1,4-butylene.
- r is an integer ranging from 0 to 5, more preferably from 0 to 2.
- the R 7 groups can be identical or different, and the (R 7 0)r fragments can be linked randomly or in blocks.
- linear C4-C24 alkyl groups mention may in particular be made of n-butyl, n-heptyl, n-hexyl, n-pentyl, n-octyl, n-nonyl, n-decyl, n- undecyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, n-eicosyl and n-tetracosyl.
- the R 8 and R 9 groups are chosen, independently, from linear C6-C24 alkyl groups, more preferably from linear C6-C20 alkyl groups, typically from linear Cs-Ci 6 alkyl groups. .
- monomers (e) mention may in particular be made of: 2-octyldecyl (meth)acrylate, an ester of ethylene glycol mono-2-octylpentadecyl ether and (meth)acrylic acid, ( 2-octyldodecyl meth)acrylate, 2-n-decyltetradecyl (meth)acrylate, 2-n-dodecylhexadecyl (meth)acrylate, 2-tetradecyloctadecyl (meth)acrylate, 2-dodecylpentadecyl (meth)acrylate , 2-tetradecylheptadecyl (meth)acrylate, 2-hexadecylheptadecyl (meth)acrylate, 2-heptadecylicosyl (meth)acrylate, 2-hexadecyldocosyl (meth)acrylate, 2-eicosy
- the monomers (e) are chosen from alkyl (meth)acrylates in which the alkyl group is chosen from branched C12-C36, more preferably C14-C32, typically C16-C28 alkyl groups.
- Monomers (b) to (e) are obtained by reacting a terminal hydroxyl group or an amine group of a compound comprising a hydrocarbon group with a (meth)acrylic acid, but not by modifying a hydrocarbon polymer.
- monomers (b) through (e) are not polyolefin-based monomers.
- those obtained by the addition of 2 to 20 moles of ethylene oxide, propylene oxide or butylene oxide to C Cs alcohols and those obtained by the addition of 1 to 20 moles of ethylene oxide, propylene oxide or butylene oxide to alcohols containing C10-C50 branched alkyl groups are also not obtained by modification of hydrocarbon polymers.
- these monomers are not polyolefin-based monomers.
- the (co)polymer of the invention comprises, in addition to the units derived from monomers (a) to (e), repeating units obtained by polymerization of monomers chosen from the group consisting of:
- C3-C6 alkenylamines such as for example (meth)allylamine and crotylamine
- C2-C6 aminoalkyl (meth)acrylates such as, for example, aminoethyl (meth)acrylate
- monoalkylaminoalkyl (meth)acrylates in particular those comprising a C2-C6 aminoalkyl group in which a C1-C6 alkyl group is bonded to a nitrogen atom, such as ( N-t-butylaminoethyl meth)acrylate and N-methylaminoethyl (meth)acrylate; C6-C12 dialkenylamines, such as di(meth)allylamine, for example;
- dialkylaminoalkyl (meth)acrylates in particular those comprising a C2-C6 aminoalkyl group in which two C1-C6 alkyl groups are bonded to a nitrogen atom, such as ( N,N-dimethylaminoethyl meth)acrylate and N,N-diethylaminoethyl (meth)acrylate; alicyclic (meth)acrylates comprising a nitrogen atom such as, for example, morpholinoethyl (meth)acrylate; aromatic monomers such as for example N-(N',N'-diphenylaminoethyl)(meth)acrylamide, N,N-dimethylaminostyrene, 4-vinylpyridine, 2-vinylpyridine, N-vinylpyrrole, N-vinylpyrrolidone and N-vinylthiopyrrolidone], and
- the monomers (f) are chosen from monomers (f1) and (f3), more preferably from N-(N',N'-diphenylaminoethyl)(meth)acrylamide, N-(N',N' - dimethylaminoethyl)(meth)acrylamide, N-(N',N'-diethylaminoethyl)(meth)acrylamide, N-(N',N'-dimethylaminopropyl)(meth)acrylamide, (meth)acrylate of N, N-dimethylaminoethyl and N,N-diethylaminoethyl (meth)acrylate.
- - aromatic monomers containing a hydroxyl group such as p-hydroxystyrene; C2-C6 hydroxyalkyl (meth)acrylates such as for example 2-hydroxyethyl (meth)acrylate and 2- or 3-hydroxypropyl (meth)acrylate; mono- or bis-hydroxyalkyl C1 -C4 substituted (meth)acrylamides such as for example N,N-bis(hydroxymethyl)(meth)acrylamide, N,N-bis(hydroxypropyl)(meth)acrylamide and N, N-bis(2-hydroxybutyl)(meth)acrylamide; vinyl alcohol; C3-C12 alkenols such as for example (meth)allylic alcohol, crotyl alcohol, isocrotyl alcohol, 1-octenol and 1-undecenol; monools or diols of C4-C12 alkenes such as for example 1-butene-3-ol, 2-butene-1-ol and 2-butene-1,
- polyoxyalkylene glycols in which the alkylene group is C2-C4 and the degree of polymerization is from 2 to 50; polyoxyalkylene polyols such as, for example, polyoxyalkylene ethers of polyhydric alcohols comprising from 3 to 8 hydroxyl groups, the alkylene group being C2-C4, and the degree of polymerization ranging from 2 to 100; mono(meth)acrylates of C1-C4 alkyl ethers of polyoxyalkylene glycols or of polyoxyalkylene polyols such as, for example, polyethylene glycol (Mn from 100 to 300 g.mol- 1 ), polypropylene glycol mono(meth)acrylate (Mn: from 130 to 500 g.mol -1 ), methoxy polyethylene glycol mono(meth)acrylate (Mn: from 110 to 310 g.mol -1 ), the product of the addition of lauryl alcohol with oxide of ethylene (2 to 30 moles), and polyoxyethylene mono(meth)acrylate
- the monomers (h) are chosen in particular from the following monomers (h1) and (h2).
- Examples of monomers (h1) (meth)acryloyloxyalkyl C2-C4 phosphate esters such as for example (meth)acryloyloxyethyl phosphate and (meth)acryloyloxyisopropyl phosphate; alkenyl phosphate esters such as for example vinyl phosphate, allyl phosphate, propenyl phosphate, isopropenyl phosphate, butenyl phosphate, pentenyl phosphate, octenyl phosphate, phosphate decenyl and dodecenyl phosphate.
- the term "(meth)acryloyloxy” means acryloyloxy or methacryloyloxy.
- Examples of monomers (h2) (meth)acryloyloxy alkyl C2-C4 phosphonic acids such as for example (meth)acryloyloxyethyl phosphonic acid; alkenyl acids in C2-C12 phosphonics such as for example vinylphosphonic acid, allylphosphonic acid and octenylphosphonic acid.
- the monomers (h) are chosen from monomers (h1), more preferably from (meth)acryloyloxyalkyl C2-C4 phosphate esters, advantageously the monomers (h) are (meth)acryloyloxyethyl phosphate.
- the (co)polymer of the invention comprises, in addition to the units derived from monomers (a) to (h), repeating units obtained by polymerization of monomers (i) comprising at least two unsaturated groups.
- monomer (i) mention may be made of divinylbenzene; C4-C12 alkadienes such as butadiene, isoprene, 1,4-pentadiene, 1,6-heptadiene and 1,7-octadiene; (di)cyclopentadiene; vinylcyclohexene and ethylidenebicycloheptene, limonene, ethylene di(meth)acrylate, polyalkylene oxide glycol di(meth)acrylate, pentaerythritol triallyl ether, trimethylolpropane tri(meth)acrylate, and esters disclosed in WO 01/009242 such as for example a glycolic ester of an unsaturated carboxylic acid having a number average molecular weight (Mn) greater than or equal to 500 g. mol -1 or an ester of an unsaturated alcohol and a carboxylic acid.
- Mn number average molecular weight
- the (co)polymer of the invention may also comprise, in addition to the units derived from monomers (a) to (i), repeating units obtained by polymerization of monomers chosen from:
- Examples of monomer (j) C2-C20 alkenes such as ethylene, propylene, butene, isobutylene, pentene, heptene, diisobutylene, octene, dodecene and octadecene .
- monomers (I) examples include styrene, ⁇ -methylstyrene, vinyltoluene, 2,4-dimethylstyrene, 4-ethylstyrene, 4-isopropylstyrene, 4-butylstyrene, 4-phenylstyrene, 4-cyclohexylstyrene, 4-benzylstyrene, 4-crotylbenzene, indene and 2-vinylnaphthalene.
- C1-C12 alkyl, aryl or alkoxyalkylvinyl ethers methyl vinyl ether, ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether; 2-e
- Examples of monomers containing an epoxy group (n) glycidyl (meth)acrylate and glycidyl (meth)allyl ether.
- Examples of monomers containing a halogen (o) vinyl chloride, vinyl bromide, vinylidene chloride, (meth)allyl chloride and halogenated styrenes such as for example dichlorostyrene.
- alkyl, cycloalkyl or aralkyl esters of unsaturated polycarboxylic acids [C1-C8 alkyl diesters (dimethyl maleate, dimethyl fumarate, diethyl maleate and maleate dioctyl) of unsaturated dicarboxylic acids (such as maleic acid, fumaric acid and itaconic acid)].
- composition of the copolymer can be determined by proton nuclear magnetic resonance spectroscopy ( 1 H NMR) or by gas chromatography coupled with mass spectrometry (GC-MS).
- the monomers (a) represent from 1% to 50% by weight, relative to the total weight of the (co)polymer, more preferably from 5% to 40% by weight, in particular from 8% to 40% by weight, typically 10% to 30% by weight.
- the monomers (b) represent from 1% to 80% by weight, relative to the total weight of the (co)polymer, more preferably from 5% to 60% by weight, in particular from 10% to 35% by weight, typically 10% to 30% by weight.
- the monomers (a) and (b) together represent at least 10% by weight of the total weight of the (co)polymer, more preferably from 15% to 90% by weight, in particular from 20% to 80% by weight, typically 20% to 50% by weight.
- the monomers (c) represent from 1% to 80% by weight, relative to the total weight of the (co)polymer, more preferably from 20% to 70% by weight, in particular from 30% to 65% by weight.
- the monomers (d) represent from 1% to 40% by weight, relative to the total weight of the (co)polymer, more preferably from 1% to 35% by weight, in particular from 2% to 30% by weight.
- the monomers (e) represent from 0% to 40% by weight, relative to the total weight of the (co)polymer, more preferably from 1% to 30% by weight, in particular from 1% to 25% by weight.
- the monomers (f), (h) and (h) each represent from 0% to 15% by weight, relative to the total weight of the (co)polymer, more preferably from 1% to 12% by weight, in particular from 2% to 10% by weight.
- the monomers (i) represent from 0.01 ppm to 200 ppm by weight, relative to the total weight of the (co)polymer, more preferably from 0.005 ppm to 50 ppm by weight, in particular from 0.1 ppm to 20 ppm by weight.
- the monomers (j) to (p) each represent from 0 ppm to 10% by weight, relative to the total weight of the (co)polymer, more preferably from 1% to 7% by weight, in particular from 2% to 5% by weight.
- the copolymer has a weight average molecular weight (Mw) of 5000 g. mol -1 to 2,000,000 g. mol -1 , more preferably 150,000 g. mol -1 to 1,000,0000 g. mol -1 , in particular from 230,000 g.moM to 1,000,000 g. mol -1 , in particular 300,000 g. mol -1 at 800,000 g. mol -1 .
- Mw weight average molecular weight
- the weight average molar mass can be determined by steric exclusion chromatography with poly(methyl methacrylate) (PMMA) standards.
- the (co)polymer preferably has a crystallization temperature of less than or equal to -30°C, more preferably less than or equal to -40°C, in particular less than or equal to -50°C, typically less than or equal to -60 °C.
- copolymer implemented according to the invention can be synthesized according to any method well known to those skilled in the art or can be found commercially.
- Specific examples include a method in which the monomers are subjected to solution polymerization in a solvent in the presence of a polymerization catalyst.
- solvent include toluene, xylene, C9-C10 alkylbenzenes, methyl ethyl ketone and mineral oils.
- polymerization catalysts examples include azo catalysts (such as 2,2'-azobis(2-methylbutyronitrile) and 2,2'-azobis(2,4-dimethylvaleronitrile)), peroxide catalysts (such as benzoyl peroxide, cumyl peroxide and lauryl peroxide) and redox catalysts (such as mixtures of benzoyl peroxide and tertiary amines).
- azo catalysts such as 2,2'-azobis(2-methylbutyronitrile) and 2,2'-azobis(2,4-dimethylvaleronitrile)
- peroxide catalysts such as benzoyl peroxide, cumyl peroxide and lauryl peroxide
- redox catalysts such as mixtures of benzoyl peroxide and tertiary amines.
- a known chain transfer agent such as C2-C20 alkyl mercaptans
- the polymerization temperature is preferably 25°C to 140°C, more preferably 50°C to 120°C.
- the (co)polymer of the invention can also be obtained by bulk, emulsion or suspension polymerization
- the (co)polymer when it is a copolymer, it can be one of the following types: a random addition polymer, an alternative copolymer, a graft copolymer and a block copolymer.
- the copolymer of the invention is used in the lubricating composition, preferably in an amount ranging from 0.1% to 10% by weight of dry matter, more preferably from 0.5% to 5% by weight of dry matter. dry, even more preferably from 0.8% to 3% by weight of dry matter, relative to the total weight of the lubricating composition.
- the lubricating composition according to the invention comprises one or more friction modifiers comprising molybdenum, such that the amount of molybdenum in the lubricating composition ranges from 100 ppm to 1500 ppm by weight, preferably from 300 ppm to 1000 ppm by weight, more preferably from 500 ppm to 1000 ppm by weight, relative to the total weight of the lubricating composition.
- the quantity of molybdenum element, in particular of MoDTC compounds, of the lubricating composition according to the invention can be measured according to standard ASTM D5185.
- the lubricating composition comprises from 0.01% to 10% by weight, preferably from 0.1% to 5% by weight, more preferably from 0.5% to 3% by weight, of modifier (s) molybdenum friction, based on the total weight of the lubricating composition.
- the friction modifier(s) comprising molybdenum are chosen from organomolybdenum compounds, in particular chosen from molybdenum dithiocarbamate derivatives (MoDTC), molybdenum dithiophosphate derivatives (MoDTP) or sulfur-free molybdenum complexes, preferably still among molybdenum dithiocarbamate derivatives (MoDTC).
- Molybdenum dithiocarbamate compounds are complexes formed from a metal nucleus bonded to one or more ligands independently chosen from alkyl dithiocarbamate groups.
- the MoDTC compound of the compositions according to the invention may comprise from 1% to 40%, preferably from 2% to 30%, more preferably from 3% to 28%, even more preferably from 4% to 15% by mass of molybdenum, relative to the total mass of the MoDTC compound.
- the MoDTC compound used according to the invention can be chosen from compounds whose core comprises two molybdenum atoms (dimeric MoDTC) and compounds whose core comprises three molybdenum atoms (trimeric MoDTC).
- Trimeric MoDTC compounds generally have the formula Mo3S k L n in which:
- ⁇ k represents an integer at least equal to 4, preferably ranging from 4 to 10, advantageously from 4 to 7;
- ⁇ n represents an integer ranging from 1 to 4.
- ⁇ L represents an alkyl dithiocarbamate group comprising from 1 to 100 carbon atoms, preferably from 1 to 40 carbon atoms, advantageously from 3 to 20 carbon atoms.
- trimeric MoDTC compounds mention may be made of the compounds and their methods of preparation described in patent application WO-98-26030.
- the MoDTC compound used in the lubricating composition according to the invention is a dimeric MoDTC compound.
- dimeric MoDTC compounds mention may be made of the compounds and their methods of preparation described in patent application EP-0757093.
- Dimeric MoDTC compounds are generally of formula (A): (A) in which:
- R 1 , R 2 , R 3 and R 4 identical or different, independently represent a hydrocarbon group chosen from alkyl, alkenyl, aryl, cycloalkyl and cycloalkenyl groups;
- ⁇ X 1 , X 2 , X 3 and X 4 identical or different, independently represent an oxygen atom or a sulfur atom.
- R 1 , R 2 , R 3 and R 4 which are identical or different, independently represent an alkyl group comprising from 4 to 18 carbon atoms or an alkenyl group comprising from 2 to 24 carbon atoms.
- X 1 , X 2 , X 3 and X 4 can be identical and represent a sulfur atom or else be identical and represent an oxygen atom. Also advantageously, X 1 and X 2 can represent a sulfur atom and X 3 and X 4 can represent an oxygen atom. Also advantageously, X 1 and X 2 can represent an oxygen atom and X 3 and X 4 can represent a sulfur atom.
- the MoDTC compound of formula (A) can also be chosen from at least one symmetrical MoDTC compound, at least one asymmetrical MoDTC compound and combinations thereof.
- symmetrical MoDTC compound is meant a MoDTC compound of formula (A) in which the R 1 , R 2 , R 3 and R 4 groups are identical.
- asymmetric MoDTC compound is meant a MoDTC compound of formula (A) in which the R 1 and R 2 groups are identical, the R 3 and R 4 groups are identical and the R 1 and R 2 groups are different from the R 3 groups. and R 4 .
- the lubricating composition according to the invention may comprise a mixture of at least one symmetrical MoDTC compound and at least one asymmetric MoDTC compound.
- R 1 and R 2 which are identical, then represent an alkyl group comprising from 5 to 15 carbon atoms and R 3 and R 4 , which are identical to and different from R 1 and R 2 , represent an alkyl group comprising from 5 to 15 carbon atoms.
- R 1 and R 2 which are identical, represent an alkyl group comprising from 6 to 10 carbon atoms and R 3 and R 4 represent an alkyl group comprising from 10 to 15 carbon atoms.
- R 1 and R 2 which are identical, can represent an alkyl group comprising from 10 to 15 carbon atoms and R 3 and R 4 can represent an alkyl group comprising from 6 to 10 carbon atoms. Also, R 1 and R 2 , R 3 and R 4 , which are identical, can represent an alkyl group comprising from 5 to 15 carbon atoms, preferably from 8 to 13 carbon atoms.
- the MoDTC compound is chosen from the compounds of formula (A) in which:
- ⁇ X 1 and X 2 represent an oxygen atom
- ⁇ X 3 and X 4 represent a sulfur atom
- R 1 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms
- R 2 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms
- ⁇ R 3 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms
- R 4 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms.
- the MoDTC compound can be chosen from the compounds of formula (A1) in which R 1 , R 2 , R 3 and R 4 are as defined for formula (A).
- the MoDTC compound is a mixture:
- the ratio (S/O) of the number of sulfur atoms to the number of oxygen atoms of the MoDTC compound can generally vary from (1/3) to (3/1).
- MoDTC compounds mention may be made of the Molyvan L®, Molyvan 807® or Molyvan 822® products marketed by the company R. T Vanderbilt Company or the Sakuralube 200®, Sakuralube 165®, Sakuralube 525® or Sakuralube 600® products. marketed by the company Adeka.
- the lubricating composition used according to the invention can also be implemented with an organomolybdenum compound chosen from the MoDTC compounds described in patent application WO-2012-141855.
- the MoDTP compound is chosen from the compounds of formula
- R 5 , R 6 , R 7 and R 8 which are identical or different, independently represent a hydrocarbon group chosen from alkyl, alkenyl, aryl, cycloalkyl or cycloalkenyl groups.
- MoDTP compounds As examples of MoDTP compounds, mention may be made of the Molyvan L® product marketed by the company R.T Vanderbilt Company or the Sakura-lube 300® or Sakura-lube 310G® products marketed by the company Adeka.
- the invention can also be implemented with a complex organomolybdenum compound free of sulfur and phosphorus.
- This organomolybdenum complex free of sulfur and phosphorus can be prepared using amide-type ligands, mainly prepared by reacting a source of molybdenum, for example molybdenum trioxide, and an amine derivative and acids fat comprising for example from 4 to 28 carbon atoms, preferably from 8 to 18 carbon atoms. Examples of fatty acids are derived from vegetable or animal oils.
- This organomolybdenum complex can be prepared according to the methods described in patents US-4889647, EP-0546357, US-5412130, EP-1770153. A preferred organomolybdenum complex is obtained by reaction
- a source of molybdenum chosen from molybdenum trioxide or molybdates, preferably ammonium molybdate, in an amount sufficient to provide from 0.1 to 30%, preferably from 2 to 8.5%, in mass of molybdenum relative to the mass of complex.
- the organomolybdenum complex comprises at least one compound of formula (D) or of formula (E) or their mixture: in which :
- ⁇ L 1 and L 2 identical or different, independently represent O or NH
- ⁇ Q 1 and Q 2 identical or different, independently represent a linear or branched, saturated or unsaturated alkyl group, comprising from 3 to 30 carbon atoms, preferably from 3 to 20 carbon atoms, advantageously from 7 to 17 carbon atoms .
- This organomolybdenum complex can be prepared by reaction:
- the organomolybdenum complex comprises at least one compound of formula (D1) or of formula (D2) or their mixture: in which Q 1 independently represents a linear or branched, saturated or unsaturated alkyl group, comprising from 3 to 30 carbon atoms, preferentially from 3 to 20 carbon atoms, advantageously from 7 to 17 carbon atoms.
- the lubricating composition according to the invention further comprises one or more boron dispersant(s), such that the amount of boron element in the lubricating composition ranges from 10 to 300 ppm by weight, preferably from 20 to 300 ppm by weight, relative to the total weight of the lubricating composition.
- the amount of boron element in the lubricating composition according to the invention can be measured according to standard ASTM D 5185.
- the lubricating composition comprises from 0.01% to 10% by weight, preferably from 0.01% to 5% by weight, of borated dispersan(s), relative to the total weight of the lubricating composition.
- the borated dispersant(s) are chosen from borated succinimides, typically from borated polyisobutene succinimides.
- the lubricating composition according to the invention comprises one or more base oils.
- This base oil can be chosen from many oils.
- the base oil of the lubricating composition according to the invention may in particular be chosen from oils of mineral or synthetic origin belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) ( Table A) or mixtures thereof.
- Table 1
- the mineral base oils useful 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, desalphatation, solvent dewaxing, hydrotreating, hydrocracking, hydroisomerization and hydrofinishing. Blends of synthetic and mineral oils can also be used.
- lubricating bases there is generally no limitation as to the use of different lubricating bases to produce the lubricating compositions according to the invention, except that they must have properties, in particular of viscosity, viscosity index, sulfur content , resistance to oxidation, suitable for use in engines.
- the base oils of the lubricating compositions used according to the invention can also be chosen from synthetic oils, such as certain esters of carboxylic acids and alcohols, polyalkylene glycols (PAG), as well as from polyalphaolefins.
- synthetic oils such as certain esters of carboxylic acids and alcohols, polyalkylene glycols (PAG), as well as from polyalphaolefins.
- the lubricating composition according to the invention comprises at least one Group II oil and/or at least one Group III oil.
- the base oil or oils represent at least 50% by weight, preferably at least 60% by weight, more preferably at least 70% by weight, even more preferably at least 75% by weight, of the total weight of the lubricating composition.
- the lubricating composition comprises from 50% to 99.89% by weight, preferably from 70% to 99.5% by weight, more preferably from 80% to 99% by weight of oil basestock(s), preferably including at least one Group II oil and/or at at least one Group III oil and/or at least one Group IV oil and/or at least one Group V oil.
- the lubricating composition also comprises one or more other additives.
- the other preferred additives for the lubricating composition according to the invention are chosen from detergent additives, anti-wear additives, friction modifier additives with the exception of molybdenum-based friction modifiers, extreme pressure additives, dispersants other than the boron dispersants defined above, pour point improvers, viscosity index improvers, anti-foaming agents, thickeners and mixtures thereof.
- the additives chosen from detergent additives, anti-wear additives, friction modifier additives with the exception of molybdenum-based friction modifiers, extreme pressure additives, dispersants other than boron dispersants defined above, pour point improvers, viscosity index improvers, anti-foaming agents, thickeners and mixtures thereof constitute up to 20% by weight, preferably from 0, 1% to 15% by weight, more preferably 1% to 10% by weight, of the total weight of the lubricating composition.
- the lubricating composition further comprises at least one detergent.
- Detergent additives generally make it possible to reduce the formation of deposits on the surface of metal parts by dissolving the secondary products of oxidation and combustion.
- the detergent additives which can be used in the lubricating composition according to the invention are generally known to those skilled in the art.
- Detergent additives can be anionic compounds comprising a long lipophilic hydrocarbon chain and a hydrophilic head.
- the associated cation can be a metal cation of an alkali or alkaline earth metal.
- the detergent additives are preferably chosen from alkali metal or alkaline-earth metal salts of carboxylic acids, sulfonates, salicylates, naphthenates, as well as phenate salts.
- the alkali and alkaline-earth metals are preferably calcium, magnesium, sodium or barium. These metal salts generally comprise the metal in stoichiometric quantity or else in excess, therefore in quantity greater than the stoichiometric quantity. These are then overbased detergent additives; the excess metal providing the overbased character to the detergent additive is then generally in the form an oil-insoluble metal salt, for example a carbonate, a hydroxide, an oxalate, an acetate, a glutamate, preferably a carbonate.
- an oil-insoluble metal salt for example a carbonate, a hydroxide, an oxalate, an acetate, a glutamate, preferably a carbonate.
- the lubricating composition comprising at least one detergent chosen from detergents based on calcium, detergents based on magnesium, and their mixture.
- the lubricating composition according to the invention comprises at least one calcium-based detergent and at least one magnesium-based detergent.
- the lubricating composition according to the invention may comprise from 2 to 4% by weight of detergent additive(s) relative to the total mass of the lubricating composition.
- the lubricating composition according to the invention may also additionally comprise at least one non-boronated dispersing agent.
- the non-boronated dispersing agent can be chosen from Mannich bases, succinimides and their derivatives.
- the non-boronated dispersant(s) can be chosen from non-boronated polyisobutene succinimide, and mixtures thereof.
- the lubricating composition according to the invention may comprise from 0.2% to 10% by mass of non-boronated dispersing agent, relative to the total mass of the lubricating composition.
- the lubricating composition used according to the invention may comprise at least one pour point improving additive or PPD agent (for pour point depressant or pour point reducing agent).
- PPD agent for pour point depressant or pour point reducing agent
- the pour point reducing agents generally improve the cold behavior of the lubricating composition used according to the invention.
- pour point reducing agents mention may be made of polyalkyl methacrylates (different from the copolymer of the invention), polyacrylates (different from the copolymer of the invention), polyarylamides, polyalkylphenols, polyalkylnaphthalenes, alkylated polystyrenes.
- the lubricating composition according to the invention may also comprise at least one anti-wear additive, at least one extreme pressure additive or mixtures thereof.
- the lubricating composition used according to the invention comprises at least one anti-wear additive.
- Anti-wear additives and extreme pressure additives protect friction surfaces by forming a protective film adsorbed on these surfaces.
- the anti-wear additives are chosen from phospho-sulphur additives such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically zinc dialkyldithiophosphates or ZnDTP.
- the preferred compounds are of formula Zn((SP(S)(OR a )(OR b ))2, in which R a and R b , which are identical or different, independently represent an alkyl group, preferably an alkyl group comprising from 1 to 18 carbon atoms.
- Amine phosphates are also anti-wear additives which can be used in the lubricating composition used according to the invention.However, the phosphorus provided by these additives can act as a poison for the catalytic systems of automobiles because these Additives generate ash These effects can be minimized by partially replacing the amine phosphates with additives that do not provide phosphorus, such as, for example, polysulphides, in particular sulphur-containing olefins.
- the lubricating composition according to the invention may comprise from 0.01 to 6% by mass, preferentially from 0.05 to 4% by mass, more preferentially from 0.1 to 2% by mass relative to the mass total of lubricating composition, anti-wear additives and extreme pressure additives.
- the lubricating composition according to the invention may comprise at least one friction modifier additive different from the molybdenum friction modifier defined in the present invention.
- the friction modifier additive can be selected from a compound providing metallic elements and an ash-free compound.
- the compounds providing metallic elements mention may be made of complexes of transition metals such as Sb, Sn, Fe, Cu, Zn, the ligands of which may be hydrocarbon compounds comprising oxygen, nitrogen, sulfur or of phosphorus.
- the ash-free friction modifier additives are generally of organic origin and can be chosen from fatty acid and polyol monoesters, alkoxylated amines, alkoxylated fatty amines, fatty epoxides, borate fatty epoxides; fatty amines or fatty acid glycerol esters.
- the fatty compounds comprise at least one hydrocarbon group comprising from 10 to 24 carbon atoms.
- the lubricating composition according to the invention may comprise from 0.01% to 2% by mass or from 0.01% to 5% by mass, preferably from 0.1% to 1.5% by mass or from 0.1% to 2% by mass relative to the total mass of the lubricating composition, of friction modifier additive.
- the lubricating composition according to the invention may comprise at least one antioxidant additive.
- the antioxidant additive generally makes it possible to delay the degradation of the lubricating composition in service. This degradation can in particular result in the formation of deposits, in the presence of sludge or in an increase in the viscosity of the lubricating composition.
- Antioxidant additives act in particular as free radical inhibitors or hydroperoxide destroyers.
- antioxidant additives of the phenolic type antioxidant additives of the amine type, phosphosulfur antioxidant additives.
- Some of these antioxidant additives, for example phosphosulfur antioxidant additives can be ash generators.
- the phenolic antioxidant additives may be ash-free or may be in the form of neutral or basic metal salts.
- the antioxidant additives may in particular be chosen from sterically hindered phenols, sterically hindered phenol esters and sterically hindered phenols comprising a thioether bridge, diphenylamines, diphenylamines substituted with at least one C1-C12 alkyl group, N,N '-dialkyl-aryl-diamines and mixtures thereof.
- the sterically hindered phenols are chosen from compounds comprising a phenol group of which at least one carbon vicinal to the carbon bearing the alcohol function is substituted by at least one Ci-C10 alkyl group, preferably an alkyl group C 1 -C 6 , preferably a C 4 alkyl group, preferably by the ter-butyl group.
- Amino compounds are another class of antioxidant additives that can be used, possibly in combination with phenolic antioxidant additives.
- amino compounds are aromatic amines, for example aromatic amines of formula NR c R d R e in which R c represents an aliphatic group or an optionally substituted aromatic group, R d represents an optionally substituted aromatic group, R e represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R f S(0) z R 9 in which R f represents an alkylene group or an alkenylene group, R 9 represents an alkyl group, a alkenyl group or an aryl group and z represents 0, 1 or 2.
- Sulfurized alkyl phenols or their alkali metal and alkaline earth metal salts can also be used as antioxidant additives.
- antioxidant additives are that of copper compounds, for example copper thio- or dithio-phosphates, salts of copper and of carboxylic acids, dithiocarbamates, sulphonates, phenates, copper acetylacetonates. Copper I and II salts, succinic acid or anhydride salts can also be used.
- the lubricating composition used according to the invention may contain all types of antioxidant additives known to those skilled in the art.
- the lubricating composition comprises at least one ash-free antioxidant additive. So also advantageous, the lubricating composition used according to the invention comprises from 0.5 to 2% by weight relative to the total mass of the composition, of at least one antioxidant additive.
- the lubricating composition can also comprise at least one polymer improving the viscosity index different from the copolymer defined in the present invention.
- polymers improving the viscosity index include polymer esters, homopolymers or copolymers, hydrogenated or non-hydrogenated, of styrene, butadiene and isoprene, polymethacrylates (PMA).
- the lubricating composition according to the invention may comprise from 0.1 to 15% by mass relative to the total mass of the lubricating composition of a polymer improving the viscosity index different from the copolymer defined herein. invention.
- the lubricating composition according to the invention has a kinematic viscosity at 100° C. ranging from 3.8 mm 2 /s to 21.9 mm 2 /s. Kinematic viscosity can be measured according to ASTM D445.
- the invention also relates to the use, in a lubricating composition comprising a base oil, one or more molybdenum friction modifiers and one or more boron dispersants, of a copolymer as defined above for improving the cold stability of said lubricating composition.
- the lubricating composition comprising the base oil, the molybdenum friction modifier(s), the boron dispersant(s) and the copolymer of the invention has improved cold stability compared to the composition free of the copolymer.
- cold stability is meant within the meaning of the invention the ability of a lubricating composition to retain its physical homogeneity during prolonged storage, in particular of several weeks, at a low temperature, in particular at a temperature of 0°C.
- a composition having good cold stability does not present problems of sedimentation or of formation of deposits during prolonged storage at low temperature.
- the cold stability of a lubricating composition can typically be evaluated in the following way:
- 50 mL of the lubricating composition to be tested are poured into a test tube before being placed in a refrigerated enclosure.
- the lubricating composition is cloudy due to the formation of a large amount of deposits.
- the copolymer is as defined previously in the context of the lubricating composition according to the invention.
- the molybdenum friction modifier(s) are as defined above in the context of the lubricating composition according to the invention.
- the boron dispersant(s) are as defined above in the context of the lubricating composition according to the invention.
- the base oil or oils are as defined above.
- the lubricating composition is as defined above, after addition of the copolymer.
- the copolymer is used at a rate of 0.1 to 10% by weight of dry matter, preferably from 0.5 to 5% by weight of dry matter, more preferably from 0.8 to 3% by weight of dry matter, relative to the total weight of the lubricating composition (after addition of the copolymer).
- the invention also relates to the use of the lubricating composition according to the invention for lubricating the parts of an engine such as a motor vehicle engine.
- the invention also relates to a method for lubricating at least one part of an engine, preferably of a vehicle engine, comprising bringing at least one part of the engine into contact with the lubricating composition according to the invention. .
- the invention also relates to a method for reducing the friction occurring inside an engine, said method comprising the use of a combination of a copolymer as defined above, a friction modifier molybdenum and a boron dispersant in a lubricating composition comprising a base oil.
- the invention also relates to a method making it possible to improve the fuel economy (FE or fuel eco) properties of a lubricating composition, said method comprising the use of a combination of a copolymer as defined above, a molybdenum friction modifier and a boron dispersant in a lubricating composition comprising a base oil.
- the invention also relates to a method making it possible to improve the cold stability properties (typically at 0° C.) of a lubricating composition, said method comprising the use of a combination of a copolymer as defined above , a molybdenum friction modifier and a boron dispersant in a lubricating composition comprising a base oil.
- the molybdenum friction modifier, the boron dispersant and the copolymer are then provided separately or else in the form of a combination within the lubricating composition.
- the copolymer, the molybdenum friction modifier, the boron dispersant and more generally the resulting lubricating composition may have one or more of the characteristics defined above in the context of the lubricating composition according to 'invention.
- composition CL1 is a composition according to the invention and composition CC1 is a comparative composition outside the invention.
- Table 2 is a composition according to the invention and composition CC1 is a comparative composition outside the invention.
- Copolymer 1 (according to the invention) is as defined in US 2017/0009177 A1.
- Copolymer 2 (outside the invention) is as defined in WO 2012/081180 A1.
- the additive package includes a calcium-based detergent, a magnesium-based detergent, and a boron succinimide dispersant.
- the ability of the lubricating compositions prepared above to reduce the friction occurring in an engine are evaluated as follows: The test is carried out using a Nissan MR20DD engine, the power of which is 108 kw at 5600 rev /min, driven by an electric generator making it possible to impose a rotation speed of between 550 and 4400 rpm while a torque sensor makes it possible to measure the friction torque generated by the movement of the parts in the engine.
- the friction torque induced by the lubricating composition to be tested is compared, for each engine speed and for each average torque at each temperature, with that induced by the reference lubricating composition (SAE 0W16) which was evaluated before and after the lubricating composition to test.
- SAE 0W16 reference lubricating composition
- a detergent additive for lubricating oil comprising one rinse, followed by two rinses with a reference lubricant composition of grade OW-12 comprising 81.7% by mass of base oil, 17.8% by mass of Common Additives (4.4% Viscosity Index Improver, 0.5% Oxidizer, 0.20% Pour Point Depressant and 12.7% Additive Pack) , and 0.05% by mass of molybdenum dithiocarbamate (MoDTC), relative to the total mass of the base oil;
- a detergent additive for lubricating oil comprising one rinse, followed by two rinses with a reference lubricant composition of grade OW-12 comprising 81.7% by mass of base oil, 17.8% by mass of Common Additives (4.4% Viscosity Index Improver, 0.5% Oxidizer, 0.20% Pour Point Depressant and 12.7% Additive Pack) , and 0.05% by mass of molybdenum dithiocarbamate (MoDTC), relative to the total mass of the base oil;
- the instructions implemented are:
- the lubricating composition according to the invention CL1 has a gain in friction, measured at 50° C. and 80° C., greater than that of the comparative composition CC1.
- the composition according to the invention CL1 therefore makes it possible to reduce more significantly the friction occurring in an engine, compared to the comparative composition CC1.
- the copolymer of the invention makes it possible to reduce the friction occurring inside an engine.
- the copolymer defined in the invention makes it possible to improve the FE properties of the lubricating composition.
- Example 3 Evaluation of the cold stability The cold stability of the lubricating compositions prepared above is evaluated in the following way:
- 50 mL of the lubricating composition to be tested are poured into a test tube before being placed in a refrigerated enclosure.
- the lubricating composition is cloudy due to the formation of a large amount of deposits.
- the lubricating composition according to the invention CL1 has better cold stability than the comparative composition CC1.
- the composition according to the invention is stable even after 7 weeks of storage at 0°C.
- the copolymer defined in the invention therefore makes it possible to improve the cold properties of the lubricating composition.
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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)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2100094A FR3118630B1 (fr) | 2021-01-06 | 2021-01-06 | Composition lubrifiante ayant une stabilité à froid et des propriétés fuel eco améliorées |
| PCT/EP2022/050092 WO2022148753A1 (fr) | 2021-01-06 | 2022-01-04 | Composition lubrifiante ayant une stabilité à froid et des propriétés fuel eco améliorées |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4274879A1 true EP4274879A1 (fr) | 2023-11-15 |
Family
ID=75278167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22700059.3A Withdrawn EP4274879A1 (fr) | 2021-01-06 | 2022-01-04 | Composition lubrifiante ayant une stabilité à froid et des propriétés fuel eco améliorées |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20240059997A1 (fr) |
| EP (1) | EP4274879A1 (fr) |
| JP (1) | JP2024501899A (fr) |
| KR (1) | KR20230126740A (fr) |
| CN (1) | CN116917449A (fr) |
| FR (1) | FR3118630B1 (fr) |
| WO (1) | WO2022148753A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081180A1 (fr) * | 2010-12-17 | 2012-06-21 | 三洋化成工業株式会社 | Améliorant de l'indice de viscosité et composition d'huile de graissage |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4316973A (en) | 1979-09-10 | 1982-02-23 | The University Of Akron | Novel telechelic polymers and processes for the preparation thereof |
| US4889647A (en) | 1985-11-14 | 1989-12-26 | R. T. Vanderbilt Company, Inc. | Organic molybdenum complexes |
| DE3700363A1 (de) | 1987-01-08 | 1988-07-21 | Basf Ag | Kraft- oder schmierstoffzusammensetzung und verwendung von polybutyl- oder polyisobutylderivaten in denselben |
| US5137647A (en) | 1991-12-09 | 1992-08-11 | R. T. Vanderbilt Company, Inc. | Organic molybdenum complexes |
| JPH05186787A (ja) * | 1992-01-09 | 1993-07-27 | Tonen Corp | 潤滑油組成物 |
| US5412130A (en) | 1994-06-08 | 1995-05-02 | R. T. Vanderbilt Company, Inc. | Method for preparation of organic molybdenum compounds |
| JPH0931483A (ja) | 1995-07-20 | 1997-02-04 | Tonen Corp | 潤滑油組成物 |
| JP4533973B2 (ja) | 1996-12-13 | 2010-09-01 | エクソンモービル リサーチ アンド エンジニアリング カンパニー | 有機モリブデン錯体を含有する潤滑油組成物 |
| WO2001009242A1 (fr) | 1999-07-30 | 2001-02-08 | Sanyo Chemical Industries, Ltd. | Composition de polyol polymere, son procede de production et procede de production de resine polyurethanne |
| EP1479946B1 (fr) * | 2003-05-23 | 2012-12-19 | Nissan Motor Co., Ltd. | Piston pour un moteur à combustion interne |
| US7205423B1 (en) | 2005-09-23 | 2007-04-17 | R.T. Vanderbilt Company, Inc. | Process for the preparation of organo-molybdenum compounds |
| BR112013025981B1 (pt) | 2011-04-15 | 2019-01-22 | Vanderbilt Chemicals, Llc | composições de dialquilditiocarbamato de molibdênio e composições lubrificantes contendo o mesmo |
| FR2998303B1 (fr) | 2012-11-16 | 2015-04-10 | Total Raffinage Marketing | Composition lubrifiante |
| FR3014898B1 (fr) | 2013-12-17 | 2016-01-29 | Total Marketing Services | Composition lubrifiante a base de triamines grasses |
| JP6060311B2 (ja) * | 2014-02-25 | 2017-01-11 | 三洋化成工業株式会社 | 粘度指数向上剤及び潤滑油組成物 |
| FR3039165B1 (fr) * | 2015-07-23 | 2018-11-30 | Total Marketing Services | Composition lubrifiante a fuel eco longue duree |
| JP6703453B2 (ja) * | 2015-08-05 | 2020-06-03 | 三洋化成工業株式会社 | 粘度指数向上剤組成物及び潤滑油組成物 |
| RU2019121715A (ru) * | 2016-12-19 | 2021-01-19 | Эвоник Оперейшнс Гмбх | Комопозиция смазочного масла, содержащая диспергирующие гребенчатые полимеры |
-
2021
- 2021-01-06 FR FR2100094A patent/FR3118630B1/fr active Active
-
2022
- 2022-01-04 WO PCT/EP2022/050092 patent/WO2022148753A1/fr not_active Ceased
- 2022-01-04 EP EP22700059.3A patent/EP4274879A1/fr not_active Withdrawn
- 2022-01-04 JP JP2023541069A patent/JP2024501899A/ja active Pending
- 2022-01-04 CN CN202280009270.1A patent/CN116917449A/zh active Pending
- 2022-01-04 US US18/271,119 patent/US20240059997A1/en not_active Abandoned
- 2022-01-04 KR KR1020237026567A patent/KR20230126740A/ko active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081180A1 (fr) * | 2010-12-17 | 2012-06-21 | 三洋化成工業株式会社 | Améliorant de l'indice de viscosité et composition d'huile de graissage |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3118630B1 (fr) | 2024-04-19 |
| CN116917449A (zh) | 2023-10-20 |
| FR3118630A1 (fr) | 2022-07-08 |
| JP2024501899A (ja) | 2024-01-16 |
| WO2022148753A1 (fr) | 2022-07-14 |
| US20240059997A1 (en) | 2024-02-22 |
| KR20230126740A (ko) | 2023-08-30 |
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