WO2021198131A1 - Composition lubrifiante comprenant un composé 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate - Google Patents
Composition lubrifiante comprenant un composé 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate Download PDFInfo
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- WO2021198131A1 WO2021198131A1 PCT/EP2021/058073 EP2021058073W WO2021198131A1 WO 2021198131 A1 WO2021198131 A1 WO 2021198131A1 EP 2021058073 W EP2021058073 W EP 2021058073W WO 2021198131 A1 WO2021198131 A1 WO 2021198131A1
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- 0 *CCNCC* Chemical compound *CCNCC* 0.000 description 1
- QAMWZBANZHNWAM-UHFFFAOYSA-N CCCCCC(CC)COC(CC(C(OCC(CC)CCCC)=O)Sc1nnc(S)[s]1)=O Chemical compound CCCCCC(CC)COC(CC(C(OCC(CC)CCCC)=O)Sc1nnc(S)[s]1)=O QAMWZBANZHNWAM-UHFFFAOYSA-N 0.000 description 1
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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the 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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
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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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
- C10M135/36—Heterocyclic sulfur, selenium or tellurium compounds the ring containing sulfur and carbon with nitrogen or oxygen
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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
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
- C10M2219/106—Thiadiazoles
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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
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
- C10M2227/066—Organic compounds derived from inorganic acids or metal salts derived from Mo or W
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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
- 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
- C10N2030/54—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
Definitions
- Lubricating composition comprising a 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate compound
- the invention relates to the field of lubricating compositions, in particular the fuel economy properties known as fuel economy (FE or fueleco) of lubricating compositions. More specifically, the invention relates to an additive composition making it possible to maintain over time the fuel economy properties of a lubricating composition (FE retention or fuel eco retention). The invention also relates to the use in a lubricating composition of an additive composition according to the invention as well as the resulting lubricating composition.
- FE fuel economy
- fueleco fuel economy
- the invention also relates to the use in a lubricating composition of an additive composition according to the invention as well as the resulting lubricating composition.
- the oil change intervals are also very variable, from 5,000 km for some small diesel engines, they can go up to 100,000 km on modern commercial vehicle diesel engines.
- Lubricating compositions for motor vehicles must be adaptable to all of these conditions of use and thus must have improved properties and performance.
- the lubrication of the parts sliding over one another plays a decisive role, in particular in reducing the friction between these parts and consequently the wear thereof, in particular allowing fuel savings.
- Lubricating compositions for motor vehicles have an influence on the fuel consumption.
- Lubricating compositions for automobile engines allowing fuel savings are often referred to as fuel eco (FE), in English terminology.
- the improvement of the fuel eco performance level is constantly sought in the formulation of automotive lubricants.
- the organomolybdenum compound such as MoDTC forms two compounds M0S 2 (lamellar molybdenum disulphide) which reduces friction and molybdenum trioxide (M0O 3 ) which tends to increase wear.
- the Molybdenum forming part of the organomolybdenum compound oxidizes which is responsible for the loss of performance of the organomolybdenum compound over time and therefore a loss of performance of the Fuel Eco of the lubricating composition (and therefore of the fuel economy) in the weather.
- An objective of the present invention is to provide a lubricating composition having Fuel Eco properties that are prolonged over time and therefore to maintain a reduction in fuel consumption over time.
- Another objective of the present invention is to provide a lubricating composition which makes it possible to maintain a low coefficient of friction over time.
- Yet another object of the present invention is to provide a solution to the decrease in the effectiveness of the organomolybdenum compound over time.
- Yet another objective of the present invention is to provide a compound making it possible to protect the organomolybdenum compound of a lubricating composition from its degradation over time, in particular by oxidation.
- the invention relates first of all to a composition of additives for lubricating oil comprising:
- the invention also relates to a lubricating composition
- a lubricating composition comprising:
- the invention finally relates to the use of a 2, 5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound in a lubricating composition comprising at least one base oil and at least one organomolybdenum compound, preferably chosen from dinuclear organomolybdenum compounds.
- a 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound is used to maintain the fuel economy of an internal combustion engine over time.
- 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate ranges from 1: 100 to 100: 1, preferably from 1: 10 to 10: 1, more preferably from 1: 5 to 5: 1.
- the organomolybdenum compound is chosen from dinuclear organomolybdenum compounds, preferably from molybdenum dithiocarbamates.
- the 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound is chosen from the compounds of formula (IV) below: in which R 'represents a C1-C34 alkyl group substituted by at least one C 1 -C 34 alkyl carboxylate group, preferably at least two C 1 -C 34 alkyl carboxylate groups.
- the group R ′ is a C1-C30, preferably C1-C20, more preferably C1-C10, typically C1-C5 alkyl group, for example an ethyl group.
- the alkyl carboxylate group (s) are chosen, independently, from the alkyl carboxylate groups in C1-C30, preferably in C1-C20, more preferably in C1-C10, for example is a 2-ethylhexyl group.
- the compound 2, 5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate corresponds to the following formula (V):
- the lubricating composition comprises from 50% to 99.5% by mass of base oil, relative to the total mass of the lubricating composition.
- the content of molybdenum element in the lubricating composition ranges from 50 to 1,500 ppm by mass, preferably from 100 to 1,000 ppm by mass, relative to the total mass of the lubricating composition.
- the lubricating composition comprises from 0.2% to 1.0% by mass of 2,5-dimercapto-1, 3,4-thiadiazole, alkyl (poly) carboxylate compound, preferably 0.2 to 0.9 % by mass, for example 0.5% by mass, relative to the total mass of the lubricating composition.
- the lubricating composition has a sulfur content ranging from 0.01% to 5% by mass, preferably from 0.1% to 2% by mass, more preferably from 0.1% to 0.5% by mass, relative to the total mass of the composition.
- the compound 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate is more thermally stable than the other sulfur compounds used in lubricating compositions such as for example a polysulfide compound or a phospho-sulfur compound.
- the presence of the 2,5-dimercapto- 1,3,4-thiadiazole alkyl (poly) carboxylate compound in a lubricating composition comprising an organomolybdenum compound, such as for example molybdenum dithiocarbamate, also called MoDTC, makes it possible to reduce the oxidation of molybdenum or even to protect the molybdenum from oxidation and to promote the sulfurization of the organomolybdenum compound and of the sulfurized by-products of molybdenum and therefore to maintain over time the properties of the organomolybdenum compound, such as, for example, MoDTC.
- organomolybdenum compound such as for example molybdenum dithiocarbamate, also called MoDTC
- the invention relates to a lubricating oil additive composition
- a lubricating oil additive composition comprising:
- a subject of the invention is also a lubricating composition comprising: - at least one base oil,
- organomolybdenum compound according to the invention is meant any liposoluble organomolybdenum compound.
- the organomolybdenum compound according to the present invention can be chosen from organic molybdenum complexes comprising at least one chemical element molybdenum (Mo), preferably at least two chemical elements molybdenum (Mo), and at least one ligand such as a ligand. carboxylate, ester ligand, amide ligand, dithiophosphate ligand, dithiocarbamate ligand.
- the organic complexes of molybdenum with carboxylates, esters, amides can be obtained by reaction of molybdenum oxide or ammonium molybdates with fatty substances, glycerides, fatty acids or derivatives of fatty acids (esters , amines, amides, ).
- the carboxylate ligands, the ester ligands and the amide ligands are free from sulfur and phosphorus.
- the organomolybdenum compound of the invention is chosen from complexes of molybdenum with amide ligands, mainly prepared by reaction of a source of molybdenum, which may for example be molybdenum trioxide, and of a derivative of amine, and of fatty acids comprising, for example, from 4 to 36 carbon atoms, such as, for example, the fatty acids contained in vegetable or animal oils.
- a source of molybdenum which may for example be molybdenum trioxide, and of a derivative of amine
- fatty acids comprising, for example, from 4 to 36 carbon atoms, such as, for example, the fatty acids contained in vegetable or animal oils.
- the organomolybdenum compound is chosen from dinuclear organomolydbene compounds.
- nuclear organomolybdenum compound is meant within the meaning of the invention organomolybdenum compounds whose nucleus has two molybdenum atoms. We also speak of dimeric organomolydbene compounds.
- the organomolybdenum compound is chosen from organic complexes of molybdenum with amide ligands obtained by reaction:
- - X 1 represents an oxygen atom or a nitrogen atom
- - X 2 represents an oxygen atom or a nitrogen atom
- - n or m represents 1 when respectively X 1 or X 2 represents an oxygen atom
- - n or m represents 2 when respectively X 1 or X 2 represents a nitrogen atom
- molybdenum chosen from molybdenum trioxide or molybdates, preferably ammonium molybdate.
- the organomolybdenum compound may comprise from 0.1 to 30% by weight, preferably from 0.1 to 20%, more preferably from 2 to 8.5% by weight of molybdenum relative to to the total weight of the organomolybdenum complex.
- the organomolybdenum compound comprises at least one organic molybdenum complex of formula (I) or (II), alone or as a mixture: in which :
- X 1 represents an oxygen atom or a nitrogen atom
- X 2 represents an oxygen atom or a nitrogen atom
- n represents 1 when X 1 represents an oxygen atom and m represents 1 when X 2 represents an oxygen atom
- n represents 2 when X 1 represents a nitrogen atom and m represents 2 when X 2 represents a nitrogen atom
- R 1 represents a linear or branched, saturated or unsaturated alkyl group comprising from 4 to 36 carbon atoms, preferably from 4 to 20 carbon atoms, advantageously from 6 to 18 carbon atoms; in which :
- X 1 represents an oxygen atom or a nitrogen atom
- X 2 represents an oxygen atom or a nitrogen atom
- n represents 1 when X 1 represents an oxygen atom and m represents 1 when X 2 represents an oxygen atom
- n represents 2 when X 1 represents a nitrogen atom and m represents 2 when X 2 represents a nitrogen atom
- R 1 represents a linear or branched, saturated or unsaturated alkyl group comprising from 4 to 36 carbon atoms, preferably from 4 to 20 carbon atoms, advantageously from 6 to 18 carbon atoms;
- R2 represents a linear or branched, saturated or unsaturated alkyl group comprising from 4 to 36 carbon atoms, preferably from 4 to 20 carbon atoms, advantageously from 6 to 18 carbon atoms.
- organic molybdenum complex of formula (I) or (II) is prepared by reaction:
- molybdenum chosen from molybdenum trioxide or molybdates, preferably ammonium molybdate.
- the organic molybdenum complex of formula (I) consists of at least one compound of formula (la) or (lb), alone or as a mixture: (
- the organomolybdenum compound is chosen from organic complexes of molybdenum with dithiophosphate ligands or organic complexes of molybdenum with dithiocarbamate ligands.
- organic complexes of molybdenum with dithiophosphate ligands are also called molybdenum dithiophosphates or Mo-DTP compounds and organic complexes of molybdenum with dithiocarbamate ligands are also called molybdenum dithiocarbamates or Mo-DTC compounds .
- the organomolybdenum compound is chosen from molybdenum dithiocarbamates.
- Mo-DTC compounds are complexes formed from a metal nucleus of molybdenum bound to one or more ligands, the ligand being an alkyl dithiocarbamate group. These compounds are well known to those skilled in the art.
- the Mo-DTC compound can comprise from 1 to 40%, preferably from 2 to 30%, more preferably from 3 to 28%, advantageously from 4 to 15% by weight of molybdenum, relative to the total weight of the Mo-DTC compound.
- the Mo-DTC compound can comprise from 1 to 40%, preferably from 2 to 30%, more preferably from 3 to 28%, advantageously from 4 to 15% by weight of sulfur , relative to the total weight of the Mo-DTC compound.
- the Mo-DTC compound is a dimeric Mo-DTC compound.
- dimeric Mo-DTC compounds mention may be made of the compounds and their preparation processes as described in documents EP 0757093, EP 0719851, EP 0743354 or EP 1013749.
- the dimeric Mo-DTC compounds generally correspond to the compounds of formula (III): in which :
- R 3 , FU, R 5 , R 6 identical or different, independently represent a hydrocarbon group chosen from alkyl, alkenyl, aryl, cycloalkyl or cycloalkenyl groups,
- X 3 , X 4 , X 5 and Cb identical or different, independently represent an oxygen atom or a sulfur atom.
- alkyl group within the meaning of the invention, is meant a hydrocarbon group, linear or branched, saturated or unsaturated, comprising from 1 to 24 carbon atoms, preferably from 4 to 18 carbon atoms.
- the alkyl group is chosen from the group formed by methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, iso-pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, isotridecyl, tetradecyl, l 'hexadecyl, stearyl, icosyl, docosyl, tetracosyl, triacontyl, 2-ethylhexyl, 2-butyloctyl, 2-butyldecyl, 2-hexyloctyl, 2-hexyldecyl, 2-octyldecyl, 2-hexyldodecyl , 2-
- alkenyl group within the meaning of the present invention is meant a linear or branched hydrocarbon group comprising at least one double bond and comprising from 2 to 24 carbon atoms.
- the alkenyl group can be chosen from vinyl, allyl, propenyl, butenyl, isobutenyl, pentenyl, isopentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tetradecenyl and oleic.
- aryl group is intended to mean a polycyclic aromatic hydrocarbon or an aromatic group, whether or not substituted by an alkyl group.
- the aryl group can contain from 6 to 24 carbon atoms.
- the aryl group can be selected from the group formed by phenyl, toluyl, xylyl, cumenyl, mesityl, benzyl, phenethyl, styryl, cinnamyl, benzhydryl, trityl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl, phenylphenyl, benzylphenylphenyl, phenylphenyl, and -stylphenyl naphthyl.
- cycloalkyl group is intended to mean a polycyclic or cyclic hydrocarbon, whether or not substituted by an alkyl group.
- cycloalkenyl group means a polycyclic or cyclic hydrocarbon, substituted or not by an alkyl group, and comprising at least one unsaturation.
- Cycloalkyl groups and cycloalkenyl groups can have from 3 to 24 carbon atoms.
- the cycloalkyl groups and the cycloalkenyl groups can be chosen, without limitation, from the group consisting of cyclopentyl, cyclohexyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexenyl.
- R 3 , FU, R 5 and FÎ 6 independently represent an alkyl group comprising from 1 to 24 carbon atoms, preferably from 4 to 18 carbon atoms or an alkenyl group comprising from 2 to 24 carbon atoms.
- X 3 , X 4 , X 5 and Cb may be identical and may represent a sulfur atom.
- X 3 , X 4 , X 5 and Cb may be the same and may be an oxygen atom.
- X 3 and X 4 can represent a sulfur atom and X 5 and Cb can represent an oxygen atom.
- X 3 and X 4 can represent an oxygen atom and X 5 and Cb can represent a sulfur atom.
- the ratio of the number of sulfur atoms relative to the number of oxygen atoms (S / O) of the Mo-DTC compound can vary from (1/3) to ( 3/1).
- the Mo-DTC compound of formula (III) can be chosen from a symmetrical Mo-DTC compound, an asymmetric Mo-DTC compound and their combination.
- symmetrical Mo-DTC compound according to the invention is meant an Mo-DTC compound of formula (V) in which the groups R 3 , FU, R 5 and R 6 are identical.
- asymmetric Mo-DTC compound according to the invention is meant an Mo-DTC compound of formula (V) in which the groups R 3 and R 4 are identical, the groups R 5 and R 6 are identical and the groups R 3 and R 4 are different from the R 5 and R 6 groups .
- the Mo-DTC compound is a mixture of at least one symmetrical Mo-DTC compound and at least one asymmetric Mo-DTC compound.
- R 3 and R 4 represent an alkyl group comprising from 5 to 15 carbon atoms, preferably from 8 to 13 carbon atoms
- R 5 and R 6 represent an alkyl group comprising from 5 to 15 carbon atoms, preferably from 8 to 13 carbon atoms
- the groups R 3 and R 4 are identical or different from the groups R 5 and R 6 .
- R 3 and R 4 represent an alkyl group comprising from 6 to 10 carbon atoms and R 5 and R 6 , identical, represent an alkyl group comprising from 10 to 15 carbon atoms, and the R 3 and R 4 groups are different from the R 5 and R 6 groups .
- R 3 and FU represent an alkyl group comprising from 10 to 15 carbon atoms and R 5 and FÎ 6 , identical, represent an alkyl group comprising from 6 to 10 atoms. carbon, and the R 3 and R 4 groups are different from the R 5 and R 6 groups .
- R 3 , R 4 , R 5 and R 6 which are identical, represent an alkyl group comprising from 5 to 15 carbon atoms, preferably from 8 to 13 carbon atoms.
- the Mo-DTC compound is chosen from the compounds of formula (III) in which:
- 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
- R 5 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms
- R 6 represents an alkyl group comprising 8 carbon atoms or an alkyl group comprising 13 carbon atoms.
- the Mo-DTC compound is chosen from the compounds of formula (III-a)
- the Mo-DTC compound is a mixture:
- Mo-DTC compounds As examples of Mo-DTC compounds, mention may be made of the products Molyvan L®, Molyvan 807® or Molyvan 822® marketed by the company RT Vanderbilt Compagny® or the products Sakura-lube 200®, Sakura-lube 165®, Sakura-lube 525® or Sakura-lube 600® marketed by the company Adeka.
- the lubricating composition according to the invention comprises from 50 ppm to 1500 ppm by mass of molybdenum element, preferably from 100 ppm to 1000 ppm by mass, relative to the total mass of the lubricant composition.
- compound 2,5-dimercapto-1, 3,4 thiadiazole alkyl (poly) carboxylate is meant within the meaning of the invention a compound derivative of 2,5-dimercapto-1,3,4 thiadiazole in which at least one of the thiol groups is substituted by an alkyl (poly) carboxylate group.
- alkyl (poly) carboxylate group is meant within the meaning of the invention an alkyl group substituted by one or more carboxylate group. When it is substituted by a single carboxylate group, it is called an “alkyl carboxylate group”. When it is substituted by at least two carboxylate groups, it is called an “alkyl polycarboxylate group”.
- only one of the thiol groups is substituted by an alkyl (poly) carboxylate group.
- the 2,5-dimercapto-1, 3,4 thiadiazole alkyl (poly) carboxylate compound is chosen from the compounds of formula (IV) below: in which R ′ represents a linear, branched or cyclic, saturated or unsaturated, C1-C34 alkyl group substituted by at least one C1-C34 alkyl carboxylate group.
- R ′ represents a linear, branched or cyclic, saturated or unsaturated, C1-C34 alkyl group substituted by at least one C1-C34 alkyl carboxylate group.
- the group R ' is chosen from C 1 -C 30 alkyl groups, more preferably C1-C2 0 , even more preferably C1-C1 0 , and advantageously C 1 -C 5 , substituted with at least a C1-C34 alkyl carboxylate group.
- the R ′ group is chosen from methyl, ethyl, propyl, n-butyl, isobutyl, ferf-butyl, n-pentyl, iso-pentyl and neopentyl groups, substituted with at least one C alkyl carboxylate group. 1 -C 34 .
- the R ′ group is an ethyl group substituted with at least one C 1 -C 34 alkyl carboxylate group.
- the alkyl carboxylate group is chosen from C 1 -C 30 alkyl carboxylate groups, more preferably C 1 -C 2 0, even more preferably C 5 -C 1 0 .
- the alkyl group of the alkyl carboxylate group can be linear, branched or cyclic.
- the alkyl group of the alkyl carboxylate group is selected from branched alkyl groups.
- the alkyl group of the alkyl carboxylate group can be saturated or unsaturated.
- the alkyl group of the alkyl carboxylate group is saturated.
- the alkyl carboxylate group is a 2-ethylhexyl carboxylate group.
- the R ′ group is substituted by at least two C 1 -C 34 alkyl carboxylate groups.
- the alkyl carboxylate groups can be the same or different.
- the alkyl carboxylate groups are identical.
- the alkyl carboxylate groups are all 2-ethylhexyl carboxylate groups.
- the 2,5-dimercapto-1, 3,4 thiadiazole alkyl (poly) carboxylate compound corresponds to the following formula (V):
- V Such compounds are commercially available, in particular from Vanderbilt under the reference Vanlube® 871 (CAS No. 12610453-53-8).
- the organomolybdenum compound and the 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound are present in the additive composition according to the invention in a mass ratio ranging from 1: 100 to 100: 1, preferably 1: 10 to 10: 1, more preferably 1: 5 to 5: 1.
- the lubricating oil composition according to the invention comprises from 0.2% to 1.0% by mass of 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound, preferably 0, 2 to 0.9% by mass, for example 0.5% by mass, relative to the total mass of the lubricating composition.
- Base oil 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound, preferably 0, 2 to 0.9% by mass, for example 0.5% by mass, relative to the total mass of the lubricating composition.
- the base oil used in the lubricating compositions of the invention can be chosen from oils of mineral or synthetic origin belonging to groups I to V according to the classes defined by the API classification (or their equivalents according to the ATIEL classification (Table 1) or their mixtures.
- the mineral base oils of the invention include any type of base oil obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, deasphalting, solvent dewaxing, hydrotreating, hydrocracking, hydro-isomerization and hydrofinishing.
- Mixtures of synthetic and mineral oils can also be used.
- 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 polyalphaolefins.
- the polyalphaolefins used as base oil are for example obtained from monomers comprising from 4 to 32 carbon atoms, for example from octene or decene, and for which the viscosity at 100 ° C is between 1 , 5 and 15 mm2.s-1 according to ASTM D445.
- Their average molar mass is generally between 250 and 3000 according to the ASTM D5296 standard.
- the lubricating composition according to the invention comprises at least 50% by mass of base oils, preferably at least 60% by mass, more preferably at least 70% by mass, relative to the total mass of the base oil. composition.
- the lubricating composition according to the invention comprises from 50 to 99.5% by mass of base oils, preferably from 70 to 99.5% by mass of base oils, relative to the total mass of the composition.
- the preferred additives for the lubricating composition according to the invention are chosen from detergent additives, the friction modifying additives differ from the molybdenum compounds defined above, extreme pressure additives, dispersants, pour point activators, agents. defoamers, thickeners and mixtures thereof.
- the lubricating compositions according to the invention comprise at least one extreme pressure additive, or a mixture.
- Anti-wear additives and extreme pressure additives protect surface friction by forming a protective film adsorbed on its surfaces.
- the anti-wear additives are chosen from additives comprising phosphorus and sulfur such as the metals alkylthiophosphate, in particular zinc alkylthiophosphate, and more precisely zinc dialkyldithiophosphate or ZnDTP.
- the preferred compounds are of formula Zn ((SP (S) (OR) (OR ')) 2, in which R and R', identical or different, independently represent an alkyl group, preferably an alkyl group comprising from 1 to 18 carbon atoms.
- Amine phosphates are also antiwear additives which can be used in the lubricating compositions of the invention.
- the phosphorus atoms provided by these additives can act as a poison in automobile catalytic systems since they generate ash.
- additives which do not provide phosphorus such as, for example, polysulfides, in particular olefins containing sulfur.
- the lubricating compositions 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 total mass of lubricating composition, anti-wear and extreme pressure additives.
- the lubricating compositions according to the invention 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 total mass of composition.
- compositions according to the invention can comprise at least one friction modifier additive different from the molybdenum compounds of the invention.
- the friction modifying additives can in particular be chosen from compounds providing metallic elements and ashless compounds.
- the compounds providing metallic elements mention may be made of transition metal complexes such as Mo, Sb, Sn, Fe, Cu, Zn for which the ligands may be hydrocarbon compounds comprising oxygen or nitrogen atoms. , sulfur or phosphorus.
- the ashless friction modifier additives are generally of organic origin or can be chosen from fatty acid monoesters and polyols, alkoxylated amines, alkoxylated fatty amines, fatty epoxides, fatty epoxy borates, amines fatty or acid esters of glycerol.
- fatty compounds comprising at least one hydrocarbon group comprising from 10 to 24 carbon atoms.
- the lubricating composition according to the invention can 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 different from the molybdenum compounds according to the invention.
- the lubricating composition according to the invention can comprise at least one antioxidant additive.
- Antioxidant additives generally delay the degradation of the lubricating composition. This degradation is most often expressed by the formation of deposit, by the presence of sludge or by an increase in the viscosity of the lubricating composition.
- Antioxidant additives generally act as free radical inhibitors or destructive hydroperoxide inhibitors.
- antioxidants commonly used mention may be made of antioxidants of the phenolic type, antioxidants of the amine type, and antioxidants containing sulfur and phosphorus. Some of these antioxidants, for example those comprising sulfur and phosphorus, 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, esters of sterically hindered phenols, sterically hindered phenols comprising a thioether bridge, diphenylamines, diphenylamines substituted with at least one C1 to C12 alkyl group, N, N '-dialkyl-aryl-diamines and mixtures thereof.
- the sterically hindered phenols are chosen from compounds comprising a phenol group for which at least one of the carbon atoms in the vicinity of the carbon atom carrying the alcohol function is substituted by at least one alkyl group in C1 to C10, preferably a C1 to C6 alkyl group, preferably a C4 alkyl group, preferably a tert-butyl group.
- Amine compounds are another class of antioxidant additives which can be used, optionally in combination with phenolic antioxidant additives.
- amine compounds are aromatic amines, for example aromatic amines of formula NRaRbRc in which Ra represents an aliphatic group or an aromatic group, optionally substituted, Rb represents an aromatic group, optionally substituted, Rc represents a hydrogen atom, an alkyl group, an aryl group or a group of the formula RdS (0) zRe in which Rd represents an alkylene or alkenylene group, Re represents an alkyl group, an alkenyl group or an aryl group and z represents 0, 1 or 2.
- Sulfur-containing alkyl phenols or their alkali or alkaline earth metal salts can also be used as antioxidant additives.
- antioxidant additives are compounds comprising copper, eg copper thio- or dithiophosphate, copper and carboxylic acid salts, dithiocarbamates, sulfonates, phenates, copper acetylacetonates. Copper I and II salts, salts of succinic acid or succinic anhydride can also be used.
- the lubricating compositions according to the invention can also comprise any type of antioxidant 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 0.1 to 2% by mass 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 the by-products of oxidation and combustion.
- detergent additives which can be used in the lubricating compositions 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 hydrophobic head.
- the associated cation can be a metal cation of an alkali or alkaline earth metal.
- the detergent additives are preferably chosen from alkali or alkaline earth metal salts of carboxylic acid, sulfonates, salicylates, naphthenates, as well as salts of phenates.
- the alkali and alkaline earth metals are preferably calcium, magnesium, sodium or barium.
- metal salts generally include the metal in a stoichiometric amount or in excess, that is to say in a content greater than the stoichiometric content.
- overbased detergents the excess metal implying the overbased nature of the detergent additive is generally in the form of an oil insoluble metal salt, for example carbonate, hydroxide, oxalate, acetate, glutamate, preferably carbonate.
- the lubricating composition according to the invention can comprise from 0.5 to 8% or from 2 to 4% by mass of overbased detergent additive relative to the total mass of the lubricating composition.
- the lubricating composition according to the invention can also comprise an additive for lowering the pour point.
- the pour point depressant additive By slowing the formation of paraffin crystals, the pour point depressant additive generally improves the cold behavior of the lubricant composition according to the invention.
- alkyl polymethacrylates As an example of a pour point lowering additive, there may be mentioned, alkyl polymethacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalene, alkyl polystyrenes.
- the lubricating composition according to the invention can also comprise a dispersing agent.
- the dispersing agents 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 lubricating composition.
- the lubricating composition according to the invention can also comprise at least one additional polymer improving the viscosity index.
- additional polymer improving the viscosity index mention may be made of polymeric esters, homopolymers or copolymers, hydrogenated or not, of styrene, butadiene, and isoprene, polymethacrylates (PMA).
- the lubricating composition according to the invention can comprise from 1 to 15% by mass, relative to the total mass of lubricating composition, of additive improving the viscosity index.
- the lubricating composition according to the invention can also comprise at least one thickening agent.
- the lubricating composition according to the invention can also comprise an anti-foaming agent and a demulsifying agent.
- the lubricating composition according to the invention comprises:
- organomolybdenum compound from 0.1% to 1.5% by mass of organomolybdenum compound
- the lubricating composition according to the invention comprises:
- the lubricating composition has a sulfur content ranging from 0.01% to 5% by mass, preferably 0.1% to 2% by mass, more preferably from 0.1% to 0.5% by mass, relative to the total mass of the lubricating composition.
- the invention also relates to the use of a 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound to protect an organomolybdenum compound, for example MoDTC, from its degradation, preferably to protect the organomolybdenum compound, for example MoDTC.
- organomolybdenum compound, eg MoDTC from oxidation.
- the present invention also relates to the use of a 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound in a lubricating composition comprising at least one base oil and at least one organomolybdenum compound, for example an organic molybdenum complex with dithiocarbamate ligands, to maintain the Fuel Eco properties of the lubricating composition over time.
- a lubricating composition comprising at least one base oil and at least one organomolybdenum compound, for example an organic molybdenum complex with dithiocarbamate ligands
- the present invention also relates to a process for protecting the degradation, in particular by oxidation, of the organomolybdenum compound, for example MoDTC, of a lubricating composition comprising at least one base oil and an organomolybdenum compound, for example MoDTC, comprising l addition, in said lubricating composition, of a 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound.
- organomolybdenum compound for example MoDTC
- the present invention also relates to a process for maintaining the Fuel Eco properties over time of a lubricating lubricating composition comprising at least one base oil and an organomolybdenum compound, for example MoDTC, comprising the addition, in said lubricating composition of a 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound.
- organomolybdenum compound for example MoDTC
- the variants and embodiments detailed below for the organomolybdenum compound and for the 2,5-dimercapto-1, 3,4-thiadiazole alkyl (poly) carboxylate compound also apply to the different uses defined above.
- the maintenance of the Fuel Eco properties of a lubricating composition can typically be evaluated by determining the change in the coefficient of friction of the composition during the operation of an engine lubricated with the composition to be tested.
- a sample of the lubricating composition is taken.
- the measurement of the coefficient of friction of the composition is then carried out according to any method known to those skilled in the art. It can for example be carried out by means of a reciprocating ball-plane tribometer. It is understood that the lower the coefficient of friction is over time, the more the effects on the fuel eco properties of the lubricating composition are maintained over time.
- a lubricating composition comprising at least one base oil and one organomolybdenum compound, for example MoDTC; and or
- FIG. 1 represents the change in the coefficient of friction of a composition according to the invention and of a reference composition as a function of the operating time of the engine. Examples:
- base oil formulated base oil of grade OW-12.
- This base oil includes:
- MoDTC molybdenum dithiocarbarmate
- compositions C0 and C1 are prepared by mixing the various constituents according to the contents indicated in Table 2 below.
- the CO composition is a reference composition (base oil without additives).
- Composition C1 is a composition according to the invention.
- the friction coefficients of the lubricating compositions C0 and C1 are measured under engine test conditions according to the following method.
- Each lubricating composition (10 kg) is evaluated during a cleanliness test of a turbo-compressed gasoline engine.
- the engine has a displacement of 1.6 L for 4 cylinders. Its power is 115 kW.
- the test cycle duration is 30 hours, alternating idling speed (between 500 and 750 rpm) and severe circulation speed (between 2500 and 5800 rpm).
- the temperature of the lubricating composition is between 50 and 150 ° C and the temperature of the water in the cooling system is between 50 and 97 ° C. No draining or any addition of lubricating composition is carried out during the test. E10 fuel is used.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2022559774A JP2023519736A (ja) | 2020-04-01 | 2021-03-29 | 2,5-ジメルカプト-1,3,4-チアジアゾールアルキルポリカルボキシレート化合物を含む潤滑剤組成物 |
EP21714206.6A EP4127112A1 (fr) | 2020-04-01 | 2021-03-29 | Composition lubrifiante comprenant un composé 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate |
US17/916,162 US20230220294A1 (en) | 2020-04-01 | 2021-03-29 | Lubricant composition comprising a 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate compound |
KR1020227038063A KR20220157501A (ko) | 2020-04-01 | 2021-03-29 | 2,5-디메르캅토-1,3,4-티아디아졸 알킬 폴리카르복실레이트 화합물을 포함하는 윤활제 조성물 |
CN202180026318.5A CN115362243B (zh) | 2020-04-01 | 2021-03-29 | 包含2,5-二巯基-1,3,4-噻二唑烷基聚羧酸酯化合物的润滑剂组合物 |
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FR2003253 | 2020-04-01 | ||
FR2003253A FR3108914B1 (fr) | 2020-04-01 | 2020-04-01 | Composition lubrifiante comprenant un composé 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate |
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WO2021198131A1 true WO2021198131A1 (fr) | 2021-10-07 |
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PCT/EP2021/058073 WO2021198131A1 (fr) | 2020-04-01 | 2021-03-29 | Composition lubrifiante comprenant un composé 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate |
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US (1) | US20230220294A1 (fr) |
EP (1) | EP4127112A1 (fr) |
JP (1) | JP2023519736A (fr) |
KR (1) | KR20220157501A (fr) |
CN (1) | CN115362243B (fr) |
FR (1) | FR3108914B1 (fr) |
WO (1) | WO2021198131A1 (fr) |
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EP0546357A1 (fr) | 1991-12-09 | 1993-06-16 | R.T. VANDERBILT COMPANY, Inc. | Complèxes organiques de molybdène |
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EP0719851A2 (fr) | 1994-12-27 | 1996-07-03 | Asahi Denka Kogyo Kabushiki Kaisha | Composition d'huile lubrifiante |
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EP0757093A1 (fr) | 1995-07-20 | 1997-02-05 | Tonen Corporation | Composition d'huile lubrifiante |
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EP1013749A2 (fr) | 1998-12-24 | 2000-06-28 | Asahi Denka Kogyo Kabushiki Kaisha | Compositions lubrifiantes |
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EP1770153A1 (fr) | 2005-09-23 | 2007-04-04 | R.T. Vanderbilt Company, Inc. | Procéde de préparation des composés organiques de molybdène |
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CN100412178C (zh) * | 2003-10-10 | 2008-08-20 | R.T.范德比尔特公司 | 含合成的酯基础油、钼化合物及基于噻二唑的化合物的润滑组合物 |
FR2961823B1 (fr) * | 2010-06-25 | 2013-06-14 | Total Raffinage Marketing | Compositions lubrifiantes pour transmissions automobiles |
JP6872299B2 (ja) * | 2016-10-11 | 2021-05-19 | 株式会社Adeka | 摩擦低減方法及び摺動機構 |
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2020
- 2020-04-01 FR FR2003253A patent/FR3108914B1/fr active Active
-
2021
- 2021-03-29 JP JP2022559774A patent/JP2023519736A/ja active Pending
- 2021-03-29 CN CN202180026318.5A patent/CN115362243B/zh active Active
- 2021-03-29 EP EP21714206.6A patent/EP4127112A1/fr active Pending
- 2021-03-29 WO PCT/EP2021/058073 patent/WO2021198131A1/fr unknown
- 2021-03-29 KR KR1020227038063A patent/KR20220157501A/ko unknown
- 2021-03-29 US US17/916,162 patent/US20230220294A1/en active Pending
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JP2023519736A (ja) | 2023-05-12 |
EP4127112A1 (fr) | 2023-02-08 |
FR3108914B1 (fr) | 2022-07-01 |
CN115362243A (zh) | 2022-11-18 |
US20230220294A1 (en) | 2023-07-13 |
FR3108914A1 (fr) | 2021-10-08 |
CN115362243B (zh) | 2023-08-25 |
KR20220157501A (ko) | 2022-11-29 |
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