EP4073211A1 - Composition lubrifiante pour limiter le frottement - Google Patents
Composition lubrifiante pour limiter le frottementInfo
- Publication number
- EP4073211A1 EP4073211A1 EP20820953.6A EP20820953A EP4073211A1 EP 4073211 A1 EP4073211 A1 EP 4073211A1 EP 20820953 A EP20820953 A EP 20820953A EP 4073211 A1 EP4073211 A1 EP 4073211A1
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- ester
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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
- C10M153/00—Lubricating compositions characterised by the additive being a macromolecular compound containing phosphorus
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/68—Esters
- C10M129/74—Esters of polyhydroxy compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/68—Esters
- C10M129/76—Esters containing free hydroxy or carboxyl groups
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- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/005—Macromolecular compounds, e.g. macromolecular compounds composed of alternatively specified monomers not covered by the same main group
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/003—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions used as base material
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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
- 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
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- 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
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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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy 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
- 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
- C10M2209/102—Polyesters
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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
- C10M2209/10—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
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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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/044—Polyamides
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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
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/04—Molecular weight; Molecular weight distribution
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
Definitions
- TITLE Lubricating composition to limit friction
- the present application relates to novel lubricating compositions, in particular for reducing the friction between mechanical parts, preferably between two parts of an engine, such as a vehicle engine.
- the lubricating compositions according to the invention can be used to lubricate an internal combustion engine, in particular a vehicle engine, in particular a motor vehicle.
- lubricants are to reduce the phenomena of friction and wear of mechanical parts, in particular in vehicle engines, and more particularly in motor vehicles.
- organomolybdenum compounds represent a family of compounds whose properties for reducing friction phenomena have been widely described.
- organomolybdenum compounds in particular organomolybdenum compounds comprising a dithiocarbamate group, can cause worsening of the phenomena of wear of mechanical parts.
- Other solutions have therefore been proposed to reduce the friction between two mechanical parts.
- polymeric organic friction modifiers are currently sometimes used.
- polymeric organic friction modifiers there may be mentioned the reaction product of an optionally functionalized polyolefin, of a polyether, of a polyol and of a carboxylic acid end group.
- WO2011 / 107739 describes organic polymeric friction modifiers.
- An objective of the present application is to provide lubricating compositions making it possible to reduce the friction between mechanical parts. Still other objectives will become apparent on reading the description of the invention which follows.
- a lubricating composition comprising, relative to the total weight of the lubricating composition:
- ester which is a product of the esterification reaction between a monoalcohol, saturated or unsaturated, linear, cyclic or branched having between 1 and 10 carbon atoms and a polycarboxylic acid or between a linear, cyclic or branched polyol and a saturated or unsaturated, linear, cyclic or branched monocarboxylic acid having between 1 and 10 carbon atoms
- said polymeric organic friction modifier being the reaction product between: a) at least one sub a hydrophobic polymer unit which comprises a hydrophobic polymer chosen from polyolefins, polyacrylics and polystyrenes; b) at least one hydrophilic polymer subunit which comprises a hydrophilic polymer selected from polyethers, polyesters and polyamides; c) optionally at least one backbone fragment capable of binding together the polymer subunits; and d) optionally a chain terminating group.
- a polymeric organic friction modifier of the aforementioned type and of an ester preferably chosen from glycerol esters, citric acid esters, tartaric acid esters and their mixing made it possible to significantly improve the coefficient of friction between mechanical parts.
- ester chosen more particularly from glycerol esters, citric acid esters, tartaric acid esters and their mixture surprisingly boosts the effect of the modifier. of polymeric organic friction.
- the polymeric organic friction modifier has a weight average molecular mass ranging from 1000 to 30,000 Daltons, preferably ranging from 1500 to 25,000 Daltons, advantageously ranging from 2000 to 20,000 Daltons.
- the weight average molecular mass can be measured by size exclusion chromatography.
- the polymeric organic friction modifier is as defined in application WO2011 / 107739.
- the hydrophobic polymer subunit of the polymeric organic friction modifier comprises a hydrophobic polymer derived from a polymer of a mono-olefin comprising 2 to 6 carbon atoms, said mono-olefin preferably being chosen from ethylene. , propylene, butene and isobutene, more preferably being isobutene, and said polymer of a monoolefin containing a chain of 15 to 500, preferably 50 to 200 carbon atoms.
- the hydrophilic polymer subunit of the polymeric organic friction modifier comprises a hydrophilic polymer selected from polyethers, polyamides and polyesters, preferably selected from polyethers.
- the hydrophilic polymer subunit is preferably linear or branched.
- the polyester is for example chosen from polyethylene terephthalate, polylactide and polycaprolactone.
- the polyether is, for example, chosen from polyglycerols and polyalkylene glycols.
- the hydrophilic polymer subunit comprises a hydrophilic polymer which is a polymer of a water-soluble alkylene glycol.
- the hydrophilic polymer subunit comprises a hydrophilic polymer which is a polyethylene glycol (PEG), preferably a PEG having a molecular weight varying from 300 to 5000 Daltons, advantageously varying from 400 to 1000 Daltons, in particular. particular varying from 400 to 800 Daltons.
- PEG polyethylene glycol
- the hydrophilic polymer subunit comprises a hydrophilic polymer selected from PEG400, RE ⁇ boo and PEG1000.
- the hydrophilic polymer subunit comprises a poly (ethylene-propylene glycol) or poly (ethylene-butylene glycol) copolymer.
- the hydrophilic polymer subunit comprises a hydrophilic polymer chosen from polyethers and polyamides derived from diols and diamines, respectively, said diols and diamines containing at least one functional group chosen from acid groups, for example a carboxylic acid group , sulfonyl groups, for example a sulfonylstyrene group, groups amines, for example tetraethylenepentamine (TEPA) or polyethylene imine (PEI), and hydroxyl groups, for example, mono- or copolymers based on sugars.
- acid groups for example a carboxylic acid group
- sulfonyl groups for example a sulfonylstyrene group
- groups amines for example tetraethylenepentamine (TEPA) or polyethylene imine (PEI)
- TEPA tetraethylenepentamine
- PEI polyethylene imine
- some of the hydrophobic polymer subunits and of the hydrophilic polymer subunits can be linked so as to form block copolymer units.
- the hydrophobic polymer subunits and the hydrophilic polymer subunits capable of forming block copolymer units include functional groups which allow them to bind to each other.
- the hydrophobic polymer subunit comprises at least one diacid or anhydride group, said diacid or anhydride group being introduced into the hydrophobic polymer subunit by reaction with a diacid or an unsaturated anhydride, for example maleic anhydride.
- the hydrophobic polymer subunit comprising at least one diacid or anhydride group is capable of reacting by esterification with a hydrophilic polymer subunit containing a hydroxyl end, for example a polyalkylene glycol.
- the hydrophobic polymer subunit comprises at least one epoxy group, said epoxy group being introduced into the hydrophobic polymer subunit by an epoxidation reaction with a peracid, for example perbenzoic or peracetic acid.
- the hydrophobic polymer subunit comprising at least one epoxy group is capable of reacting with a hydrophilic polymer subunit with hydroxyl and / or acid termination.
- the hydrophobic polymer subunit comprises at least one unsaturated termination, said unsaturated termination being by esterification reaction between at least one hydroxyl group of the hydrophilic polymer subunit and an unsaturated monocarboxylic acid, for example vinyl acids, in particular acrylic or methacrylic acid.
- the hydrophobic polymer subunit comprises at least one unsaturated termination and is capable of reacting by copolymerization of free radicals with a hydrophobic polymer subunit of polyolefin type.
- the hydrophobic polymer subunit comprises a polyisobutylene succinic anhydride (PIBSA), having a molecular weight varying from 300 to 5000 Daltons, preferably varying from 500 to 1500 Daltons, in particular varying from 800 to 1200 Daltons.
- PIBSA polyisobutylene succinic anhydride
- Polyisobutylene succinic anhydride results from the maleinization of a polyisobutylene, in particular resulting from the reaction between a polyisobutylene having an unsaturated end group and maleic anhydride.
- the block copolymer units as described above are directly linked to each other.
- block copolymer units units as described above, are linked by said at least one backbone fragment.
- the backbone fragment is chosen from polyols and polycarboxylic acids, preferably from polyols.
- the polyol is chosen from diols, triols, tetraols, dimers or trimers of diol, triol or tetraol and polymers with an extended chain of diol, triol or tetraol.
- the polyol is chosen from glycerol, neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerthyritol, dipentaerthyritol, tripentaerthyritol and sorbitol.
- the polyol is glycerol.
- the polycarboxylic acid is selected from dicarboxylic acids and tricarboxylic acids.
- the polycarboxylic acid is a dicarboxylic acid, preferably a straight chain dicarboxylic acid, more preferably a dicarboxylic acid having a chain length of between 2 and 10 carbon atoms.
- the polycarboxylic acid is chosen from oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, l sebacic acid and maleic acid.
- the polycarboxylic acid is adipic acid.
- the backbone fragment is chosen from low molecular weight alkenylsuccinic anhydrides (ASA), preferably from C18 alkenylsuccinic anhydrides.
- ASA low molecular weight alkenylsuccinic anhydrides
- the choice of the backbone fragment capable of bonding the block copolymer units together is adapted according to the case where the bonding of the units is between two hydrophobic polymer subunits, between two hydrophilic polymer subunits or between a hydrophobic polymer subunit. and a hydrophobic polymer subunit.
- the backbone fragments included in the polymeric organic friction modifier are of the same or different nature.
- the number of block copolymer units included in the polymeric organic friction modifier varies from 1 to 20, preferably from 1 to 15, preferably from 1 to 10, advantageously from 1 to 7.
- reaction product of the production of the polymeric organic friction modifier ends in a reactive group (for example the groups hydroxyls of PEG), it may be desirable or useful in certain circumstances to introduce a chain terminating group at the end of the reaction product.
- a reactive group for example the groups hydroxyls of PEG
- the chain terminating group is chosen from fatty carboxylic acids, preferentially from C12 to C22 acids, linear or branched, saturated or unsaturated, more preferably from lauric acid, erucic acid, acid isostearic, palmitic acid, oleic acid and linoleic acid, advantageously from palmitic acid, oleic acid and linoleic acid.
- the polymeric organic friction modifier used in the present invention has an acid number of less than 20, preferably less than 15.
- the reaction by which the polymeric organic friction modifier used in the present invention is produced is a one-step or a multi-step process.
- the polymeric organic friction modifier used in the present invention is the reaction product of a functionalized polyolefin, a polyether, a polyol and a carboxylic acid end group.
- the lubricating composition according to the invention comprises from 0.005 to 10% by weight, preferably from 0.05 to 5% by weight, preferably from 0.1 to 3% by weight, more preferably from 0.2 to 2% by weight, of polymeric organic friction modifier (s) as defined above, relative to the total weight of the lubricating composition.
- the lubricating composition according to the invention comprises from 0.005 to 10% by weight, preferably from 0.05 to 5% by weight, preferably from 0.1 to 3% by weight, more preferably from 0.2 to 2% by weight, of at least one ester chosen from glycerol esters, citric acid esters, tartaric acid esters, and their mixture, relative to the total weight of the lubricating composition.
- the ester used according to the invention can be a mono-, a di- or a tri-ester. It can be a mixture of mono-, di- and / or tri-esters. Preferably, the ester used according to the invention comprises at least one triester.
- the ester is chosen from glycerol esters, citric acid esters and their mixture.
- the glycerol ester is an ester of glycerol and of a carboxylic acid having from 1 to 10 carbon atoms, preferably from 2 to 8 carbon atoms.
- the carboxylic acid is a mono carboxylic acid.
- the glycerol ester is chosen from glycerol heptanoates and their mixtures.
- the carboxylic acids used to prepare the glycerol ester are saturated or unsaturated, linear, cyclic or branched carboxylic acids, optionally substituted by hydroxyl groups and / or epoxides.
- the carboxylic acid used to prepare the glycerol ester is linear and saturated and has a hydrocarbon chain consisting of carbon and hydrogen atoms.
- the carboxylic acid used to prepare the glycerol ester does not include heteroatoms other than those of the acid function.
- the glycerol ester is obtained from raw materials of renewable origin.
- the carboxylic acids which can be used to form the glycerol ester are, for example, carboxylic acids obtained from vegetable oils, fatty substances, of animal or vegetable origin such as butyric acid, valeric acid, caproic acid, etc. heptylic acid, caprylic acid, pelargonic acid, capric acid, crotonic acid, iso-crotonic acid, sorbic acid, isovaleric acid, taken alone or as a mixture.
- the glycerol ester is obtained from raw materials of fossil origin. We then speak of synthetic carboxylic acids.
- carboxylic acids such as butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, taken alone or as a mixture.
- glycerol esters used in the invention can be obtained by methods well known to those skilled in the art, for example by reacting the carboxylic acids with glycerol. These chemical reactions, well known to those skilled in the art, can take place with or without a catalyst, with or without a solvent.
- the glycerol ester used in the lubricating composition according to the invention is glycerol triheptanoate.
- the tartaric acid ester is an ester of tartaric acid and of an alcohol having from 1 to 10 carbon atoms, preferably from 2 to 8 carbon atoms. carbon.
- the alcohol used to prepare the tartaric acid ester is a monoalcohol.
- the tartaric acid ester is selected from tartaric acid triesters.
- the ester of citric acid is an ester of citric acid and an alcohol having 1 to 10 carbon atoms, preferably 2 to 8 carbon atoms.
- the alcohol used to prepare the citric acid ester is a monoalcohol.
- the citric acid ester is selected from citric acid triesters.
- the alcohols used to prepare the citric acid ester or the tartaric acid ester are saturated or unsaturated, linear, cyclic or branched alcohols, optionally substituted with acid and / or epoxy groups.
- the alcohol used to prepare the citric acid ester or the tartaric acid ester is linear and saturated and has a hydrocarbon chain consisting of carbon and hydrogen atoms.
- the alcohol used to prepare the citric acid ester or the tartaric acid ester does not contain heteroatoms other than those of the hydroxyl function.
- citric acid esters or the tartaric acid esters used in the invention can be obtained by methods well known to those skilled in the art, for example by reacting citric acid or tartaric acid with one or more alcohols. These chemical reactions, well known to those skilled in the art, can take place with or without a catalyst, with or without a solvent.
- the citric acid ester is chosen from triethylcitrate, tributylcitrate and their mixture.
- the ester of the lubricating composition is chosen from: a triester of glycerol and of a monocarboxylic acid having from 1 to 10 carbon atoms, preferably from 2 to 8 carbon atoms; and a triester of citric acid and a monoalcohol having 1 to 10 carbon atoms, preferably 2 to 8 carbon atoms; and their mixture.
- the ester of the lubricating composition is chosen from glycerol triheptanoate, triethyl citrate, tributyl citrate and their mixture.
- the lubricating composition according to the invention comprises one or more base oils, preferably in an amount of at least 50% by weight, more preferably of at least 60% by weight, or even at least 70% by weight. , relative to the total weight of the lubricating composition.
- the base oil (s) can be chosen from mineral, synthetic or natural, animal or plant lubricating base oils known to those skilled in the art.
- the base oils used in the lubricating compositions according to the invention can be oils of mineral or synthetic origins belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) (Table 1). or their mixtures.
- the mineral base oils according to the invention include all types of base oils obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, dealphating, solvent dewaxing, hydrotreatment, hydrocracking. , hydroisomerization and hydrofinishing. Mixtures 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. , oxidation resistance, suitable for their use.
- the base oils of the lubricating compositions according to the invention can also be chosen from synthetic oils, such as certain esters of carboxylic acids and alcohols, and from polyalphaolefins.
- the polyalphaolefins used as base oils are for example obtained from monomers comprising from 4 to 32 carbon atoms, for example from octene or decene, and whose viscosity at 100 ° C is between 1.5 and 15 mm 2 .
- s 1 according to ASTM D445.
- Their average molecular mass is generally between 250 and 3000 according to the ASTM D5296 standard.
- the lubricating composition according to the invention comprises from 60 to 99.5% by weight of base oils, preferably from 70 to 99.5% by weight of base oils, relative to the total weight of the composition.
- the preferred additional additives for the lubricating composition according to the invention are chosen from detergent additives, anti-wear additives different from phospho-sulfur additives, friction modifying additives different from polymeric organic friction modifiers defined above, additives extreme pressure, dispersants, pour point improvers, defoamers, thickeners and mixtures thereof.
- Amine phosphates are antiwear additives which can be used in the lubricating composition according to the invention.
- the phosphorus provided by these additives can act as a poison in the catalytic systems of automobiles because these additives generate ash.
- the lubricating composition according to the invention can comprise from 0.01 to 6% by mass, preferably from 0.05 to 4% by mass, more preferably from 0.1 to 2% by mass relative to the mass total lubricant composition, antiwear additives and extreme pressure additives.
- the lubricating composition according to the invention comprises, relative to the total weight of lubricating composition:
- esters chosen from glycerol esters, citric acid esters, tartaric acid esters and a mixture thereof;
- one or more functional additives other than polymeric organic friction modifiers and esters of glycerol, citric acid esters and tartaric acid esters preferably chosen from detergent additives, anti-wear additives other than phospho-sulfur additives, friction modifying additives, extreme pressure additives, dispersants, pour point improvers, defoamers, thickeners and mixtures thereof.
- the lubricating composition according to the invention can comprise at least one additional friction modifier additive different from the polymeric organic friction modifiers defined above.
- the additional friction modifier additive can be chosen from a compound providing metallic elements and an ash-free compound.
- the compounds providing metallic elements mention may be made of transition metal complexes such as Sb, Sn, Fe, Cu, Zn, Mo, the ligands of which may be hydrocarbon compounds comprising oxygen, nitrogen or carbon atoms. sulfur or phosphorus.
- the lubricating composition according to the invention can 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 be reflected in particular by the formation of deposits, by the presence of sludge or by an increase in the viscosity of the lubricating composition.
- Antioxidant additives act in particular as radical inhibitors or destroyers of hydroperoxides.
- antioxidant additives commonly used, there may be mentioned antioxidant additives of phenolic type, antioxidant additives of amine type, phosphosulfurized antioxidant additives. Some of these antioxidant additives, for example phosphosulfurized antioxidant additives, can generate ash.
- the phenolic antioxidant additives can be ash free or in the form of neutral or basic metal salts.
- the antioxidant additives can 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 of the carbon carrying the alcohol function is substituted by at least one C 1 -C 10 alkyl group, preferably a group C 1 -C 6 alkyl, preferably a C 4 alkyl group, preferably through the tert-butyl group.
- Amino compounds are another class of antioxidant additives that can be used, optionally in combination with phenolic antioxidant additives.
- Examples of amino compounds are aromatic amines, for example aromatic amines of formula NR 7 R 8 R 9 in which R 7 represents an aliphatic group or an aromatic group, optionally substituted, R 8 represents an aromatic group, optionally substituted, R 9 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R 10 S (O) z R 11 in which R 10 represents an alkylene group or an alkenylene group, R 11 represents an alkyl group, a alkenyl group or an aryl group and z represents 0, 1 or 2.
- Sulfurized alkyl phenols or their alkali 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, copper salts and carboxylic acids, dithiocarbamates, sulphonates, phenates, acetylacetonates of copper. Copper I and II salts, salts of succinic acid or anhydride can also be used.
- the lubricating composition according to the invention can contain all types of antioxidant additives known to those skilled in the art.
- the lubricating composition comprises at least one antioxidant additive free of ash.
- the lubricating composition 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 according to the invention can also comprise at least one detergent additive.
- Detergent additives generally reduce the formation of deposits on the surface of metal parts by dissolving oxidation and combustion by-products.
- the detergent additives which can be used in the lubricating composition according to the invention are generally known to those skilled in the art.
- the 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, sulphonates, salicylates, naphthenates, as well as salts of phenates.
- the alkali metals and alkaline earth metals are preferably calcium, magnesium, sodium or barium.
- metal salts generally comprise the metal in a stoichiometric amount or else in excess, therefore in an amount greater than the stoichiometric amount.
- overbased detergent additives the excess metal providing the overbased character to the detergent additive is then generally in the form of a metal salt insoluble in oil, for example a carbonate, a hydroxide, an oxalate, an acetate, a glutamate, preferably a carbonate .
- the lubricating composition according to the invention can comprise from 2 to 4% by weight of detergent additive relative to the total mass of the lubricating composition. Also advantageously, the lubricating composition according to the invention can also comprise at least one pour point reducing additive.
- pour point depressant additives By slowing the formation of paraffin crystals, pour point depressant additives generally improve the cold behavior of the lubricating composition according to the invention.
- pour point depressant additives there may be mentioned polymethacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes, alkylated polystyrenes.
- the lubricating composition according to the invention can also comprise at least one dispersing agent.
- the dispersing agent can be chosen from Mannich bases, succinimides and their derivatives.
- the lubricating composition according to the invention can comprise from 0.2 to 10% by mass of dispersing agent relative to the total mass of the lubricating composition.
- the lubricating composition of the present invention can also include at least one additional polymer capable of improving the viscosity index.
- additional polymer improving the viscosity index there may be mentioned polymer esters, homopolymers or copolymers, hydrogenated or non-hydrogenated, of styrene, butadiene and isoprene, polymethacrylates (PMA).
- the present invention also relates to the use of the lubricating composition as defined above for the lubrication of metal parts, in particular for the lubrication of an engine, in particular an internal combustion engine, for example a vehicle engine.
- the lubricating composition according to the invention makes it possible to reduce friction, in particular between two mechanical parts, for example two parts of an engine, in particular an internal combustion engine, for example of a vehicle engine.
- the invention relates to the use of the lubricating composition according to the invention for reducing the wear of mechanical parts, for example parts of an engine, in particular of a vehicle engine.
- the present application also relates to a method of lubricating mechanical parts, in particular in an engine, such as an internal combustion engine, comprising at least one step of bringing at least one part into contact with a lubricating composition according to the invention. .
- Example 1 Lubricating Compositions
- the compositions of Table 2 (CL: lubricating composition according to the invention; CC: comparative composition) were prepared by mixing at 60 ° C the ester and / or the polymeric friction modifier in a composition comprising l the base oil, the viscosity index improver and the additive package, to obtain the proportions indicated in Table 2.
- the percentages indicated are related to 100% by weight of lubricating composition including the ester and / or the polymeric friction modifier.
- a hydrophobic polymer subunit which comprises a hydrophobic polymer chosen from polyolefins, polyacrylics and polystyrenes
- a hydrophilic polymer subunit which comprises a hydrophilic polymer selected from polyethers, polyesters and polyamides
- d) optionally a chain terminating group
- compositions of Table 3 (CL: lubricating composition according to the invention; CC: comparative composition) were prepared by mixing the ester and / or the polymeric friction modifier at 60 ° C. in a composition comprising the base oil, the viscosity index improver and the additive package, to obtain the proportions indicated in Table 3.
- the indicated percentages are related to 100% by weight of lubricating composition including the ester and / or the polymeric friction modifier .
- Lubricating compositions according to the invention and comparative * comprising detergents, dispersants, antioxidants and antiwear.
- Example 2 Results of tribological tests The tribological tests were carried out under the following conditions: [Table 4]
- the coefficient of friction of the lubricating compositions tested is determined at 100 ° C. using an MTM device (Traction Machine or Mini Traction Machine) implementing a hardened steel ball 2 cm in diameter on a hardened steel plane.
- MTM device Traction Machine or Mini Traction Machine
- the MTM device can be a device from PCS Instruments. This device makes it possible to set in relative movement a steel ball and a steel plane in order to determine the coefficients of friction for a given lubricant composition while varying various properties such as speed, load, and temperature.
- the hardened steel plane is of reference AISI 52100 with a mirror finish (Ra less than 0.01 pm) and the ball is also of reference AISI 52100 made of hardened steel.
- the applied load is 30 N (0.96 Gpa) and the rotation speed varies from 0.007 m / s to 3 m / s.
- Approximately 50 ml of the lubricating composition tested was introduced into the device.
- the ball is engaged face against the plane, said ball and said plane being actuated independently so as to create a mixed rolling / sliding contact.
- the coefficient of friction is measured and recorded via a force sensor.
- the test is carried out for a period of 121 minutes (alternating the so-called continuous slip and “stribeck” periods).
- the speed is initially kept constant at 0.1 m / s and at each interval defined in the table, the speed changes from 3 to 0.007 m / s for one minute before returning to a speed of 0.1 m / s at the end of said defined period.
- the coefficient of friction is thus measured as a function of the defined speed.
- Table 5 gives the results for the compositions of Table 2, expressed in terms of the coefficient of friction as a function of the sliding speed.
- Table 6 for its part gives the results for the compositions of Table 3, expressed in terms of the coefficient of friction as a function of the sliding speed.
- the value of the coefficient of friction does not depend significantly on the content of polymeric friction modifier and / or ester.
- the ester has no significant effect on the coefficient of friction when used alone, without a polymeric friction modifier.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1914389A FR3104609B1 (fr) | 2019-12-13 | 2019-12-13 | Composition lubrifiante pour limiter le frottement |
| PCT/EP2020/085684 WO2021116368A1 (fr) | 2019-12-13 | 2020-12-11 | Composition lubrifiante pour limiter le frottement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4073211A1 true EP4073211A1 (fr) | 2022-10-19 |
| EP4073211B1 EP4073211B1 (fr) | 2024-11-27 |
Family
ID=70295271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20820953.6A Active EP4073211B1 (fr) | 2019-12-13 | 2020-12-11 | Composition lubrifiante pour limiter le frottement |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20230013280A1 (fr) |
| EP (1) | EP4073211B1 (fr) |
| JP (1) | JP2023505728A (fr) |
| KR (1) | KR20220115603A (fr) |
| CN (1) | CN115175977A (fr) |
| FR (1) | FR3104609B1 (fr) |
| WO (1) | WO2021116368A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11640582B2 (en) | 2014-05-28 | 2023-05-02 | Mitek Systems, Inc. | Alignment of antennas on near field communication devices for communication |
| US11788027B2 (en) * | 2022-02-18 | 2023-10-17 | Afton Chemical Corporation | Engine oil formulation with improved sequence VIII performance |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7696136B2 (en) * | 2004-03-11 | 2010-04-13 | Crompton Corporation | Lubricant compositions containing hydroxy carboxylic acid and hydroxy polycarboxylic acid esters |
| GB201003579D0 (en) | 2010-03-04 | 2010-04-21 | Croda Int Plc | Friction reducing additive |
| US9321979B2 (en) * | 2012-03-13 | 2016-04-26 | Chemtura Corporation | Friction modifier composition for lubricants |
| US9963655B2 (en) * | 2012-04-12 | 2018-05-08 | Infineum International Limited | Lubricating oil compositions |
| FR2992655B1 (fr) * | 2012-06-29 | 2015-07-31 | Total Raffinage Marketing | Composition lubrifiante |
| CN106414686A (zh) * | 2014-06-19 | 2017-02-15 | 国际壳牌研究有限公司 | 润滑组合物 |
| EP3487968B1 (fr) * | 2016-07-22 | 2020-10-21 | The Lubrizol Corporation | Composés de borate tétraédrique destinés à des compositions lubrifiantes à formulation complète |
| WO2018144166A1 (fr) * | 2017-02-01 | 2018-08-09 | Exxonmobil Research And Engineering Company | Huile lubrifiante pour moteur et procédé d'amélioration du rendement de carburant de moteur |
| EP4144823A1 (fr) * | 2018-02-12 | 2023-03-08 | Lanxess Corporation | Composition anti-usure pour lubrifiants |
-
2019
- 2019-12-13 FR FR1914389A patent/FR3104609B1/fr active Active
-
2020
- 2020-12-11 JP JP2022536504A patent/JP2023505728A/ja active Pending
- 2020-12-11 CN CN202080086505.8A patent/CN115175977A/zh active Pending
- 2020-12-11 US US17/784,724 patent/US20230013280A1/en not_active Abandoned
- 2020-12-11 EP EP20820953.6A patent/EP4073211B1/fr active Active
- 2020-12-11 KR KR1020227023893A patent/KR20220115603A/ko not_active Withdrawn
- 2020-12-11 WO PCT/EP2020/085684 patent/WO2021116368A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP4073211B1 (fr) | 2024-11-27 |
| FR3104609A1 (fr) | 2021-06-18 |
| US20230013280A1 (en) | 2023-01-19 |
| CN115175977A (zh) | 2022-10-11 |
| WO2021116368A1 (fr) | 2021-06-17 |
| FR3104609B1 (fr) | 2022-04-22 |
| KR20220115603A (ko) | 2022-08-17 |
| JP2023505728A (ja) | 2023-02-10 |
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