EP3990593A1 - Utilisation d'un compose de type succinimide a titre d'additif anti-corrosion dans une composition lubrifiante destinee a un systeme de propulsion d'un vehicule electrique ou hybride - Google Patents
Utilisation d'un compose de type succinimide a titre d'additif anti-corrosion dans une composition lubrifiante destinee a un systeme de propulsion d'un vehicule electrique ou hybrideInfo
- Publication number
- EP3990593A1 EP3990593A1 EP20736592.5A EP20736592A EP3990593A1 EP 3990593 A1 EP3990593 A1 EP 3990593A1 EP 20736592 A EP20736592 A EP 20736592A EP 3990593 A1 EP3990593 A1 EP 3990593A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- succinimide
- group
- additive
- compound
- type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/16—Amides; Imides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
- C10M133/56—Amides; Imides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C10M2205/22—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts
- C10M2205/223—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/086—Imides [having hydrocarbon substituents containing less than thirty carbon atoms]
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
- C10M2215/28—Amides; Imides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/10—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
- 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
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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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
- C10N2040/02—Bearings
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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
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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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
- C10N2040/14—Electric or magnetic purposes
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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
- the present invention relates to the field of lubricating compositions for a propulsion system of an electric or hybrid vehicle. It relates more particularly to the use of compounds of succinimide type for improving the anti-corrosion properties of a lubricating composition incorporating one or more anti-wear additive (s) amine (s) and / or sulfur (s).
- the term “electric vehicle” is intended to denote a vehicle comprising an electric motor as the sole means of propulsion, unlike a hybrid vehicle which comprises a combustion engine and an electric motor as combined propulsion means. .
- propulsion system within the meaning of the present invention, is meant a system comprising the mechanical parts necessary for the propulsion of an electric vehicle.
- the propulsion system thus more particularly includes an electric motor, or the rotor-stator assembly of the power electronics (dedicated to speed regulation), a transmission and a battery.
- lubricating compositions also called “lubricants”, for the main purposes of reducing the frictional forces between the various parts of the propulsion system. vehicle, especially between moving metal parts in engines.
- lubricating compositions are also effective in preventing premature wear or even damage to these parts, and in particular to their surface.
- a lubricating composition is conventionally composed of one or more base oil (s), which are generally associated with several additives dedicated to stimulating the lubricating performance of the base oil, such as, for example, friction modifying additives, but also to provide additional performance.
- base oil s
- additives dedicated to stimulating the lubricating performance of the base oil, such as, for example, friction modifying additives, but also to provide additional performance.
- anti-wear additives are considered in order to reduce the wear of the mechanical parts of the engine, and thus prevent a degradation of the durability of the engine.
- anti-wear additives among which there may be mentioned, for example, dimercaptothiadiazoles, polysulfides, in particular sulfur-containing olefins, amine phosphates, or else phospho-sulfur additives, such as metal alkylthiophosphates, in in particular zinc alkylthiophosphates, and more specifically zinc dialkyldithiophosphates or ZnDTP.
- antiwear additives preference is given in particular to amine and / or sulfur antiwear agents, such as dimercaptothiadiazoles, zinc dithiophosphate or polysulphides.
- the lubricant is insulating in order to avoid any failure in the electrical components.
- a conductive lubricant can lead to a risk of electric current leakage from the stator and rotor windings, thus reducing the efficiency of the propulsion systems, and creating a possible overheating at the level of the electrical components, even up to 'damage the system. It is therefore crucial, in the context of the implementation of lubricants for vehicle engine systems electric or hybrid, whether the lubricants have good "electrical" properties in addition to non-corrosive properties.
- the present invention aims precisely to overcome this drawback.
- the present invention relates to the use of at least one compound of succinimide type, as an anti-corrosion additive in a lubricating composition, intended for a propulsion system of an electric or hybrid vehicle and comprising one or more additives.
- succinimide type such as for example polyalkylene succinimides such as polyisobutylene succinimides (PIBSI)
- PIBSI polyisobutylene succinimides
- the addition of at least one compound of succinimide type advantageously makes it possible to improve the anti-corrosion properties of a lubricant comprising one or more anti-wear additive (s) amine (s) and / or sulfur (s). .
- anti-corrosion additive is intended to denote an additive making it possible to prevent or reduce the corrosion of metal parts.
- An anti-corrosion additive used in a composition thus makes it possible to improve the so-called “anti-corrosion” properties of this composition.
- the corrosive (or corroding) power of a compound can be evaluated according to a test implementing the study of the variation in the value of the electrical resistance of a copper wire of a predetermined diameter, as a function of the duration immersing this yarn in a composition comprising, in a non-corrosive medium, for example in one or more base oils, said compound to be tested.
- the variation in the value of this electrical resistance is correlated directly with the variation in the diameter of the wire tested.
- a compound is qualified as “non-corrosive” when the loss in diameter of the copper wire studied is less than or equal to 1.3 ⁇ m after immersion for 80 hours, in particular less than or equal to to 0.8 ⁇ m after immersion for 40 hours in the composition comprising said compound.
- the dielectric properties of a lubricant are represented in particular by the electrical resistivity and the dielectric loss (tan d), and they can be measured according to standard IEC 60247.
- Electrical resistivity represents the material's ability to oppose the flow of electric current. It is expressed in ohm-meter (W hi) The resistivity must not be low to avoid electrical conduction.
- the electrical dissipation factor or the tangent of the loss angle is the complementary angle of the phase shift between the applied voltage and the alternating current. This factor reflects the energy losses by the Joule effect. The temperature rises are therefore directly linked to the value of d.
- Transmission oil typically has a tan value of on the order of one at room temperature. A good insulating lubricant should maintain a low level of tan d.
- the succinimide-type compound used according to the invention is chosen from polyalkylene mono- or bis-succinimides, such as polyisobutene (PIB) mono- or bis-succinimides; their borated derivatives; their succinic anhydride derivatives such as polyisobutylene succinic anhydrides (PIBSA); compounds obtained by opening such a succinic anhydride ring such as pentaerythritol ester succinimide PIBs; and their mixtures.
- polyalkylene mono- or bis-succinimides such as polyisobutene (PIB) mono- or bis-succinimides
- borated derivatives such as polyisobutylene succinic anhydrides (PIBSA)
- PIBSA polyisobutylene succinic anhydrides
- the compound of succinimide type is chosen from:
- PIB polyisobutylene
- Amino and / or sulfur anti-wear additives used in a lubricating composition according to the invention are more particularly detailed in the remainder of the text. They are preferably chosen from amine and sulfur anti-wear additives. They may preferably be compounds of the thia (di) azoles type, in particular dimercaptothiadiazole derivatives. Also, a composition suitable for the invention has the advantage of being easy to formulate. In addition to good anti-wear and anti-corrosion performance, it exhibits good stability, in particular to oxidation, as well as good properties in terms of electrical insulation.
- the present invention also relates to the use, for lubricating a propulsion system of an electric or hybrid vehicle, in particular for lubricating the electric motor and the power electronics of an electric or hybrid vehicle, of a composition lubricant comprising:
- the present invention also relates to a method of lubricating a propulsion system of an electric or hybrid vehicle, comprising at least one step of bringing at least one mechanical part of said system into contact with a lubricating composition comprising at least a compound of succinimide type as defined in the invention, as anti-corrosion additive, and at least one amine and / or sulfur anti-wear additive as defined in the invention.
- a lubricating composition according to the invention is used to lubricate the electric motor itself, in particular the bearings located between the rotor and the stator of an electric motor, and / or the transmission, in particular the reduction gear in an electric or hybrid vehicle.
- FIG 1 schematically represents an electric or hybrid vehicle propulsion system.
- the additive used as an anti-corrosion agent according to the invention, together with one or more anti-wear amine and / or sulfur additives, in a lubricating composition for a vehicle engine system electric or hybrid is a compound of the succinimide type.
- succinimide-type compounds have already been proposed for their use as dispersing agents, such as, for example, polyalkylene mono- or bis-succinimides, such as polyisobutene (PIB) mono- or bis-succinimides; their borated derivatives; their succinic anhydride derivatives, as by example polyisobutylene succinic anhydrides (PIBSA); compounds obtained by opening such a succinic anhydride ring, such as for example polyisobutylene pentaerythritol ester succinimides.
- PIB polyisobutene
- PIBSA polyisobutylene succinic anhydrides
- succinimide-type compounds are compounds comprising at least one succinimide group, in other words a group of following formula (i):
- the compounds of succinimide type can be of various kinds. They can be mono-succinimide or bis-succinimide compounds.
- the compound of succinimide type is chosen from compounds comprising at least one substituted succinimide group, in particular of the following formula (ii): [Chem 2]
- R 1 represents a hydrocarbon group, preferably comprising from 8 to 400 carbon atoms.
- R 1 can be more particularly chosen from linear or branched C6 to C400 alkyl groups, in particular C50 to C200, linear or branched C6 to C400 alkenyl groups, in particular C50 to C200, aryl groups in Cr, to Cio, arylalkyl groups and alkylaryl groups.
- R 1 represents a long alkyl chain, preferably branched, Cs to C400, in particular C50 to C200 or a long alkenyl chain, preferably branched, Cx to C400, in particular C50 to C200 comprising a single double bond of which one of the two carbon atoms is directly linked to the succinimide ring.
- R 1 represents a polyalkylene group, preferably having an average molecular mass Mw of between 140 and 50,000, in particular between 2,000 and 30,000.
- R 1 represents a poly isobutylene group, preferably with a number-average molecular mass of between 140 and 30,000, in particular between 2,000 and 20,000, or even 2,000 and 7,000 and in particular between 3,000 and 5,000.
- n an integer ranging from 6 to 500.
- R 1 represents a hydrocarbon-based group, preferably comprising
- the compound of succinimide type can be chosen from mono-succinimide compounds comprising a substituted succinimide group of above-mentioned formula (ii) and bis-succinimide compounds comprising two substituted succinimide groups, in particular of above-mentioned formula (ii), said succinimide groups being more particularly linked at their summit bearing a nitrogen atom via a polyamine group.
- the compound of succinimide type used according to the invention corresponds to the following formula (I):
- A represents an alkylene group, linear or branched, C2 to C24, preferably C 2 to C 6 ;
- R 2 and R 3 are chosen, independently of one another, from a hydrogen atom, a linear or branched alkyl group, in particular from C1 to C25; an alkoxy group, in particular C 1 to C 12 , an alkenyl group, in particular C 2 to C 12 , optionally carrying one or more hydroxyl and / or amine functions;
- R 2 and R 3 together form, with the nitrogen atom carrying them, an optionally substituted succinimide group, preferably a succinimide group substituted with an R 1 group as defined above.
- a compound of succinimide type used according to the invention can be a mono-succinimide compound of above-mentioned formula (I) in which R 2 and R 3 are chosen, independently of one another. , from a hydrogen atom, a linear or branched alkyl group, in particular C 1 to C 25 ; an alkoxy group, in particular C 1 to C 12 , an alkenyl group, in particular C 2 to C 12 , optionally carrying one or more hydroxyl and / or amine functions.
- R 2 and R 3 are chosen, independently of one another. , from a hydrogen atom, a linear or branched alkyl group, in particular C 1 to C 25 ; an alkoxy group, in particular C 1 to C 12 , an alkenyl group, in particular C 2 to C 12 , optionally carrying one or more hydroxyl and / or amine functions.
- a compound of succinimide type used according to the invention is of formula (I) above in which R 2 and R 3 represent hydrogen atoms.
- a compound of succinimide type used according to the invention can be of the following formula (II):
- A is as defined above, preferably represents at least one of the following segments -CH2-CH2-, -CH2-CH2-CH2-, -CH 2 -CH (CH) -;
- a compound of succinimide type used according to the invention can be a bis-succinimide compound of formula ( I) above in which R 2 and R 3 together form, with the nitrogen atom carrying them, an optionally substituted succinimide group, preferably a succinimide group substituted with an R 1 group as defined above.
- a bis-succinimide-type compound used according to the invention may be of the following formula (III):
- R 1 identical or different, are as defined above;
- z represents an integer between 0 and 10, preferably between 2 and 6;
- s represents an integer between 2 and 6, preferably between 2 and 4.
- the compound of bis-succinimide type may be of formula (III) in which R 1 represent polyalkylene groups, in particular polyisobutylene groups, preferably with a molecular mass of between 150 and 15,000, in particular between 500 and 2000 and in particular between 500 and 1500.
- the borated derivatives of the compounds of succinimide type of formula (I), (II) or (III) above can be obtained from non-borated compounds of succinimide type, by reaction with borates, for example with boric acid, in particular to achieve a concentration of 0.1 to 3% by mass, in particular from 1 to 2% by mass of boron in the succinimide compound.
- succinic anhydride derivatives suitable for the invention mention may be made of polyisoalkylene succinic anhydrides, in particular polyisobutylene succinic anhydrides (called “PIB SA”) such as the following compound, of molecular mass in number Mn of between 300 and 30,000 and with a molecular mass by mass Mw of between 300 and 30,000:
- PIB SA polyisobutylene succinic anhydrides
- R is a polyisobutylene group.
- the polyalkylenes pentaerithritol ester succinimides such as, for example, the polyisobutylene pentaerithritol ester succinimides of the following formulas, of molecular mass in number Mn of between 300 and 30,000 and of molecular mass in mass. Mw between 300 and 30,000:
- PIB represents polyisobutylene
- PIB represents polyisobutylene
- alkyl a saturated, linear or branched aliphatic group
- Cx to Cz alkyl represents a linear or branched hydrocarbon chain of x to z carbon atoms
- alkylene represents a divalent alkyl group.
- a C x -C z alkylene group represents a divalent hydrocarbon chain of x to z carbon atoms, linear or branched;
- alkenyl an unsaturated, linear or branched aliphatic group
- a Cx to Cz alkenyl group represents an unsaturated carbon chain of x to z carbon atoms, linear or branched
- alkoxy an -O-alkyl radical, in which the alkyl group is as defined above; aryl, a mono- or polycyclic aromatic group, in particular comprising between 5 and 10 carbon atoms.
- aryl a mono- or polycyclic aromatic group, in particular comprising between 5 and 10 carbon atoms.
- aryl group mention may be made of phenyl, tolyl or naphthyl groups.
- PIB polyisobutylene
- PIB polyisobutylene
- the additive of succinimide type is chosen from the mono- or bis-succinimides of the above-mentioned formula (I), in particular the mono-succinimides of the above-mentioned formula (II), the bis-succinimides of the above-mentioned formula (III), and their mixtures.
- the additive of succinimide type is chosen from:
- PIB polyisobutylene
- the additive of succinimide type is chosen from the following compounds:
- n is from 6 to 500, preferably is 90; and R is a linear or branched, C2 to C24, preferably C2 to C6 alkylene OR a group -R ”- (NH-R ') x- in which R' and R” represent, independently one of the other a linear or branched alkylene, C2 to C24, preferably from C2 to C6 and x is an integer ranging from 1 to 6, preferably x is 2, 3, 4 or 5.
- n is from 10 to 350, preferably is 65; and R is a linear or branched alkyl, C1 to C24, preferably from C2 to G or a group - (R '- (NH) yH in which R' represents a linear or branched, C2 to C24 alkylene, preferably from C2 to C>,, and y is an integer ranging from 1 to 6, preferably x is 2, 3 or 4.
- R is more precisely a succinimide PIB whose average molecular mass Mn is between 800 and 18,000 preferably is 3519; the average molecular weight Mw is between 1000 and 20,000, preferably is 6220; the polydispersity index Ip is between 1.5 and 2.3, preferably is 1 , 6; and
- a succinimide-type compound considered according to the invention can be in the form of a mixture of at least two succinimide-type compounds, in particular as defined above.
- the succinimide-type compounds used according to the invention can be commercially available, or else prepared according to synthetic methods known to those skilled in the art.
- succinimide-type compounds can be synthesized by condensation of an optionally substituted succinic anhydride, for example of a succinic anhydride substituted with a polyisobutylene group, with a poly (alkyleneamine).
- an optionally substituted succinic anhydride for example of a succinic anhydride substituted with a polyisobutylene group
- a poly (alkyleneamine) for example, a poly (alkyleneamine).
- PIB polyisobutylene group
- the invention is not limited to the succinimide-type compounds specifically described above.
- Other succinimide-type compounds in particular known as dispersants, can be used as anti-corrosion additives according to the invention.
- the compound (s) of succinimide type in particular as defined above, can be used in a lubricating composition according to the invention, in an amount of 0.01% to 10% by mass, in particular from 0.1% to 10% by mass, and more particularly from 0.5% to 8% by mass, relative to the total mass of the lubricating composition.
- a lubricating composition considered according to the invention does not include other anti-corrosion additives distinct from compounds of succinimide type.
- a lubricating composition used according to the invention is free from anti-corrosion additive of triazole type or of compound type with an amine function or sterically hindered phenolic function.
- a lubricating composition considered according to the invention comprises one or more anti-wear amine and / or sulfur additives.
- amine and / or sulfur anti-wear additive is intended to denote an additive chosen from amine anti-wear additives, sulfur anti-wear additives and amine and sulfur anti-wear additives.
- anti-wear additive is intended to denote a compound which, used in a lubricating composition, in particular a lubricating composition for a propulsion system of an electric or hybrid vehicle, makes it possible to improve the anti-wear properties of the composition.
- the amine and / or sulfur antiwear additive can for example be chosen from additives of the thia (di) azole type, in particular derivatives of dimercaptothiadiazole; polysulfide additives, in particular sulfur olefins, amine phosphates, phospho-sulfur additives such as alkylthiophosphates, and mixtures thereof.
- a lubricating composition considered according to the invention comprises at least one anti-wear additive of the thia (di) azoles type.
- Thia (di) azole compounds are compounds which contain both a sulfur atom and at least one nitrogen atom in a five atom ring.
- Benzothiazoles are a special type of thia (di) azoles.
- This term thia (di) azole includes, in addition to the cyclic compounds containing one sulfur atom and one nitrogen atom per ring with five atoms, also thiadiazoles which contain sulfur and two nitrogen atoms in such a ring.
- thia (di) azole type compounds can be chosen from benzothiazole derivatives, thiazole derivatives and thiadiazole derivatives.
- the antiwear additive can be a thiadiazole derivative.
- Thiadiazoles are heterocyclic compounds comprising two nitrogen atoms, one sulfur atom, two carbon atoms and two double bonds, of general formula C2N2SH2, which may exist in the following forms, respectively: 1,2,3-thiadiazole; 1,2,4-thiadiazole; 1,2,5-thiadiazole; 1,3,4-thiadiazole:
- the thiadiazole derivative is a derivative of dimercaptothiadiazole.
- a lubricating composition according to the invention comprises at least one anti-wear additive chosen from derivatives of dimercaptothiazole.
- dimercaptothiadiazole derivative means chemical compounds derived from the following four dimercaptothiadiazole molecules, below: 4,5-dimercapto 1,2,3-thiadiazole, 3,5-dimercapto-1,2,4 -thiadiazole, 3,4-dimercapto-l, 2,5-thiadiazole, 2,5-dimercapto-l, 3,4-thiadiazole, taken alone or as a mixture:
- R 1 is chosen from a hydrogen atom, a linear or branched, saturated or unsaturated alkyl group comprising from 1 to 24 carbon atoms, preferably from 2 to 18, more preferably from 4 to 16, even more preferably from 8 to 12 or an aromatic substituent.
- 2,5-dimercapto-l, 3,4-thiadiazole the derivatives of 2,5-dimercapto-l, 3,4-thiadiazole are molecules of the following formulas taken alone or as a mixture:
- group (s) R 1 represent, independently of one another, hydrogen atoms, linear or branched alkyl or alkenyl groups, comprising from 1 to 24 carbon atoms, preferably from 2 to 18, more preferably from 4 to 16, even more preferably from 8 to 12 or aromatic substituents, n being, independently of one another, integers equal to 1, 2, 3 or 4, preferably n being equal to 1.
- R independently of one another represent linear alkyl groups, Ci-C24, preferably C2 to Cis, in particular C4 to C 6, more preferably Cs to C12 and preferably C12 .
- dimercaptothiadiazole derivatives used in the present invention may be commercially available, for example from the suppliers Vanderbilt, Rhein Chemie or Afton.
- the amine and / or sulfur anti-wear additive or additives used in a lubricating composition according to the invention can still be chosen from among sulfur-based anti-wear additives of the polysulfide type, in particular sulfur olefins.
- the sulfur-containing olefins used in a lubricating composition according to the invention can in particular be dialkyl sulfides represented by the general formula R a -S x -R b , where R a and R b are alkyl groups comprising from 3 to 15 carbon atoms. , preferably from 1 to 5 carbon atoms, preferentially 3 carbon atoms, and x is an integer between 2 and 6.
- the polysulfide additive is chosen from dialkyl trisulfides.
- the anti-wear additive present in a composition used according to the invention is chosen from amino and sulfur anti-wear additives, and advantageously from thia (di) azole compounds as described above and more preferably among the derivatives of dimercaptothiadiazole.
- a lubricating composition considered according to the invention can comprise from 0.01 to 10% by mass, in particular from 0.1 to 5% by mass and more particularly from 0.5 to 3% by mass of anti-wear additive (s) amines and / or sulfur, preferably of thia (di) azole type and more preferably chosen from derivatives of dimercaptothiadiazole, relative to the total mass of the lubricating composition.
- anti-wear additive s
- amines and / or sulfur preferably of thia (di) azole type and more preferably chosen from derivatives of dimercaptothiadiazole
- anti-wear additives known in particular for lubricants for propulsion systems, distinct from amino and / or sulfur additives, can be envisaged, provided that they do not affect the properties conferred by the combination. of said compound (s) of succinimide type and of said amino and / or sulfur antiwear additive (s) according to the invention.
- a lubricating composition considered according to the invention may comprise from 0.01 to 15% by mass, in particular from 0.1 to 10% by mass and more particularly from 0.5 to 5% by mass of anti- additive (s). wear, including one or more amine and / or sulfur additives, as described above.
- anti- additive s
- wear including one or more amine and / or sulfur additives, as described above.
- a lubricant composition required according to the invention is free of antiwear additive other than said amine and / or sulfur antiwear additive (s) used according to the invention.
- a lubricating composition considered according to the invention combines:
- one or more compounds of succinimide type in particular chosen from polyalkylene mono- or bis-succinimides and their borated derivatives, such as polyisobutene mono- or bis-succinimides and their borated derivatives, in particular chosen from compounds of formula ( I) above, preferably from the compounds of formula (II) and (III) as defined above; and
- amino and sulfur antiwear additives preferably chosen from derivatives of dimercaptothiazole, in particular as defined above.
- a composition used according to the invention may comprise, in addition to one or more additives of succinimide type and one or more anti-wear additives amine (s) and / or sulfur (s), in particular as defined above, one or more base oils, as well as other additives, conventionally considered in lubricating compositions.
- a lubricating composition considered according to the invention can thus comprise one or more base oils.
- base oils can be chosen from the base oils conventionally used in the field of lubricating oils, such as mineral, synthetic or natural, animal or vegetable oils or their mixtures.
- It can be a mixture of several base oils, for example a mixture of two, three, or four base oils.
- the base oils of the lubricating compositions considered according to the invention can in particular 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) and presented in Table 1 below or their mixtures.
- Mineral base oils 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 which can be biobased, can also be used.
- base oils there is generally no limitation as to the use of different base oils to produce the compositions used according to the invention, except that they must have properties, in particular in terms of viscosity, d 'viscosity index, or resistance to oxidation, suitable for use in propulsion systems of an electric or hybrid vehicle.
- the base oils of the compositions used according to the invention can also be chosen from synthetic oils, such as certain esters of carboxylic acids and alcohols, polyalphaolefins (PAO), and polyalkylene glycol (PAG) obtained by polymerization. or copolymerization of alkylene oxides comprising from 2 to 8 carbon atoms, in particular from 2 to 4 carbon atoms.
- synthetic oils such as certain esters of carboxylic acids and alcohols, polyalphaolefins (PAO), and polyalkylene glycol (PAG) obtained by polymerization. or copolymerization of alkylene oxides comprising from 2 to 8 carbon atoms, in particular from 2 to 4 carbon atoms.
- the PAOs used as base oils are for example obtained from monomers comprising from 4 to 32 carbon atoms, for example from octene or decene.
- the weight average molecular weight of PAO can vary quite widely. Preferably, the weight average molecular mass of the PAO is less than 600 Da.
- the weight-average molecular mass of PAO can also range from 100 to 600 Da, from 150 to 600 Da, or even from 200 to 600 Da.
- oil or the base oils of the composition used according to the invention are chosen from polyalphaolefins (PAO), polyalkylene glycol (PAG) and esters of carboxylic acids and alcohols.
- PAO polyalphaolefins
- PAG polyalkylene glycol
- esters of carboxylic acids and alcohols are chosen from polyalphaolefins (PAO), polyalkylene glycol (PAG) and esters of carboxylic acids and alcohols.
- the oil or the base oils of the composition used according to the invention can be chosen from the base oils of group II or III. It is up to the person skilled in the art to adjust the base oil content to be used in a composition suitable for the invention.
- a lubricating composition considered according to the invention may comprise at least 50% by mass of base oil (s) relative to its total mass, in particular from 60 to 99% by mass of base oil (s), by compared to its total mass.
- a lubricating composition suitable for the invention may also further comprise all types of additives, other than additives of succinimide type and anti-wear additives amine (s) and / or sulfur (s) defined in the context of the present invention. , suitable for use in a lubricant for a propulsion system of an electric or hybrid vehicle. It is understood that the nature and the amount of additives used are chosen so as not to affect the properties in terms of anti-wear and anti-corrosion performance conferred by the combination of said compound (s) of succinimide type and of or of said amine (s) and / or sulfur (s) additives used according to the invention.
- Such additives can be chosen from friction modifiers, detergents, extreme pressure additives, dispersants distinct from the succinimide-type compounds according to the invention, antioxidants, pour point depressants, anti-foaming agents and mixtures thereof.
- a composition suitable for the invention comprises at least one additional additive chosen from friction modifiers, viscosity index modifiers, detergents, extreme pressure additives, dispersants, antioxidants, point-d depressants. flow, anti-foam agents and mixtures thereof.
- additives can be introduced singly and / or in the form of a mixture like those already available for sale for commercial lubricant formulations for vehicle engines, with a performance level as defined by G ACEA (Association European Automobile Manufacturers) and / or GARI (American Petroleum Institute), well known to those skilled in the art.
- G ACEA Association European Automobile Manufacturers
- GARI American Petroleum Institute
- a lubricating composition suitable for the invention may comprise at least one friction modifier additive.
- the 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 Mo, Sb, Sn, Fe, Cu, Zn, the ligands of which may be hydrocarbon compounds comprising oxygen, nitrogen or carbon atoms. sulfur or phosphorus.
- the ash-free friction modifying additives are generally of organic origin and can be chosen from fatty acid monoesters and polyols, alkoxylated amines, alkoxylated fatty amines, fatty epoxides, fatty borate epoxides; fatty amines or fatty acid glycerol esters.
- the fatty compounds comprise at least one hydrocarbon group comprising from 10 to 24 carbon atoms.
- a lubricating composition suitable for the invention may comprise from 0.01 to 2% by weight or from 0.01 to 5% by weight, preferably from 0.1 to 1.5% by weight or from 0.1 to 2%. by weight of friction modifier additive, relative to the total weight of the composition.
- a lubricating composition used according to the invention can comprise at least one antioxidant additive.
- the antioxidant additive generally helps to delay the degradation of the composition in use. 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 composition.
- Antioxidant additives act in particular as radical inhibitors or destroyers of hydroperoxides.
- antioxidant additives currently 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 free of ash or be 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 by at least one C 1 -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 -Cio alkyl group, preferably an alkyl group.
- C I -C O preferably a C4 alkyl group, preferably 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 4 R 5 R 6 in which R 4 represents an aliphatic group or an aromatic group, optionally substituted, R 5 represents an aromatic group, optionally substituted, R 6 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R 7 S (0) z R 8 in which R 7 represents a alkylene group or an alkenylene group, R 8 represents an alkyl group, an 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 and carboxylic acid salts, dithiocarbamates, sulphonates, phenates, copper acetylacetonates. Copper I and II salts, salts of succinic acid or anhydride can also be used.
- a lubricating composition used according to the invention can contain all types of antioxidant additives known to those skilled in the art.
- a lubricating composition used according to the invention comprises at least one antioxidant additive free of ash.
- a lubricating composition used according to the invention can comprise from 0.5 to 2% by weight of at least one antioxidant additive, relative to the total weight of the composition.
- a lubricating composition used according to the invention is free from an antioxidant additive of aromatic amine type or of sterically hindered phenol type.
- a lubricating composition suitable for the invention can also include at least one detergent additive.
- Detergent additives generally reduce the formation of deposits on the surface of metal parts by dissolving by-products of oxidation and combustion.
- the detergent additives which can be used in a lubricating composition used 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 metallic 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. These metal salts generally include the metal in a stoichiometric amount or else in excess, therefore in an amount greater than the stoichiometric amount.
- 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 .
- a lubricating composition suitable for the invention may for example comprise from 2 to 4% by weight of detergent additive, relative to the total weight of the composition.
- a lubricating composition used according to the invention can comprise at least one dispersing agent, distinct from the succinimide-type compounds defined according to the invention.
- the dispersing agent can be selected from Mannich bases.
- a lubricating composition used according to the invention may for example comprise from 0.2 to 10% by weight of dispersing agent (s) distinct (s) from the compounds of succinimide type defined according to the invention, relative to to the total weight of the composition.
- the lubricating composition used according to the invention does not include any dispersing agent (s), other than the succinimide-type compounds defined according to the invention.
- a lubricating composition suitable for the invention may further comprise at least one antifoam agent.
- the antifoam agent can be chosen from silicones.
- a lubricating composition suitable for the invention may comprise from 0.01 to 2% by mass or from 0.01 to 5% by mass, preferably from 0.1 to 1.5% by mass or from 0.1 to 2% by mass of antifoaming agent, relative to the total weight of the composition.
- a lubricating composition suitable for the invention may also include at least one pour point depressant additive (also called “PPD” agents for "For Point Depressant” in English).
- PPD pour point depressant additive
- pour point depressant additives By slowing the formation of paraffin crystals, pour point depressant additives generally improve the cold behavior of the composition.
- pour point lowering additives mention may be made of polymethacrylates of alkyl, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes, alkylated polystyrenes.
- a lubricating composition used according to the invention may be free from anti-corrosion additive of triazole type and from antioxidant additive of aromatic amine type or of sterically hindered phenol type.
- the said compound (s) of succinimide type may be added to an oil or mixture of base oils, then the other additional additives, including the anti-wear additive (s). amino (s) and / or sulfur (s), added.
- said compound (s) of succinimide type may be added to a pre-existing conventional lubricating formulation, comprising in particular one or more base oils, one or more anti-wear additives amine (s) and / or sulfur (s), and optionally additional additives.
- the said anti-corrosion additive (s) of succinimide type according to the invention can be combined with one or more additional additives, and the "packet" of additives thus formed added to an oil or mixture of base oils. .
- a lubricating composition used according to the invention has a kinematic viscosity, measured at 100 ° C. according to the ASTM D445 standard, ranging from 1 to 15 mm 2 / s, in particular ranging from 3 to 10 mm 2 / s.
- a lubricating composition used according to the invention has a kinematic viscosity, measured at 40 ° C. according to the ASTM D445 standard, ranging from 3 to 80 mm 2 / s, in particular from 15 to 70 mm 2 / s.
- the values of electrical resistivity measured at 90 ° C. of the lubricating compositions used according to the invention are between 5 and 10,000 Mohm.m, more preferably between 6 and 5,000 Mohm. mr.
- the dielectric loss values measured at 90 ° C. of the lubricating compositions used according to the invention are between 0.01 and 30, more preferably between 0.02 and 25, more preferably between 0.02 and 10.
- a lubricating composition used according to the invention can be of a grade according to the SAEJ300 classification defined by formula (X) W (Y), in which X represents 0 or 5; and Y represents an integer ranging from 4 to 20, in particular ranging from 4 to 16 or from 4 to 12.
- a lubricating composition used according to the invention comprises, or even consists of:
- a base oil or mixture of base oils preferably chosen from polyalphaolefins (PAO), polyalkylene glycol (PAG) and esters of carboxylic acids and alcohols;
- succinimide type preferably chosen from polyalkylene mono- and bis-succinimides, such as polyisobutene mono- and bis-succinimides, and their borated derivatives; in particular chosen from the compounds of formula (I) above, preferably from the compounds of formula (II) and (III) as defined above;
- one or more amino and / or sulfur antiwear additives preferably one or more amino and sulfur antiwear additives, and more preferably chosen from compounds of thia (di) azoles type, in particular dimercaptothiazole derivatives as defined above;
- additives chosen from friction modifiers, viscosity index modifiers, detergents, extreme pressure additives, dispersants, antioxidants, pour point depressants, anti-foam agents and their mixtures.
- a lubricating composition used according to the invention comprises, or even consists of:
- succinimide type preferably chosen from among polyalkylene mono- and bis-succinimides, such as polyisobutene mono- and bis-succinimides, and their borated derivatives; in particular chosen from the compounds of formula (I) above, preferably from the compounds of formula (II) and (III) as defined above;
- amine and / or sulfur antiwear additives preferably of one or more amino and sulfur anti-wear additives, and more preferably chosen from compounds of thia (di) azoles type, in particular dimercaptothiazole derivatives as defined above;
- base oil preferably chosen from polyalphaolefins (PAO), polyalkylene glycols (PAG), esters of carboxylic acids and alcohols and their mixtures;
- additives chosen from friction modifiers, viscosity index modifiers, detergents, extreme pressure additives, dispersants, antioxidants, point depressants flow, anti-foaming agents and mixtures thereof;
- a lubricating composition suitable for the invention is used as a lubricant for a propulsion system of an electric or hybrid vehicle, and more particularly of the engine and of the power electronics.
- the present invention relates to the use of a lubricating composition as defined above, combining one or more compounds of succinimide type, in particular as defined above, and one or more anti-wear amine and / or sulfur additives, of preferably derivatives of dimercaptothiazole, for lubricating a propulsion system of an electric or hybrid vehicle, in particular for lubricating the electric motor and the power electronics of an electric or hybrid vehicle.
- the propulsion system of an electric or hybrid vehicle comprises in particular the electric motor part (1), an electric battery (2) and a transmission, and in particular a speed reducer (3).
- the electric motor typically comprises power electronics (11) connected to a stator (13) and a rotor (14).
- the stator comprises coils, in particular copper coils, which are supplied alternately by an electric current. This makes it possible to generate a rotating magnetic field.
- the rotor itself consists of coils, permanent magnets or other magnetic materials, and is rotated by the rotating magnetic field.
- a bearing (12) is generally integrated between the stator (13) and the rotor (14).
- a transmission, and in particular a speed reducer (3), makes it possible to reduce the speed of rotation at the output of the electric motor and to adapt the speed transmitted to the wheels, allowing at the same time to control the speed of the vehicle.
- the bearing (12) is in particular subjected to high mechanical stresses and poses problems of fatigue wear. It is therefore necessary to lubricate the bearing in order to to increase its lifespan. Also, the reducer is subjected to high friction stresses and therefore needs to be lubricated appropriately in order to prevent it from being damaged too quickly.
- the invention relates in particular to the use of a composition as described above for lubricating an electric motor of an electric or hybrid vehicle, in particular for lubricating the bearings located between the rotor and the stator of an electric motor. .
- compositions as described above to lubricate the transmission, in particular the reduction gear, in an electric or hybrid vehicle.
- a composition according to the invention can thus be used to lubricate the various parts of a propulsion system of an electric or hybrid vehicle, in particular of the bearings located between the rotor and the stator of an electric motor and / or the transmission, in particular the reduction gear, in an electric or hybrid vehicle.
- a lubricating composition according to the invention exhibits excellent anti-wear and anti-corrosion performance.
- the invention also relates, according to another of its aspects, to a method of lubricating at least one part of a propulsion system of an electric or hybrid vehicle, in particular of the bearings located between the rotor and the stator of. an electric motor; and / or of the transmission, in particular of the reducer, comprising at least one step of bringing at least said part into contact with a composition as described above.
- the present invention thus proposes a method for simultaneously reducing the wear and corrosion of at least one part of a propulsion system of an electric or hybrid vehicle, in particular of the bearings located between the rotor and the stator of an electric vehicle. electric motor; and / or of the transmission, in particular of the reducer, said method comprising at least one step of bringing at least said part into contact with a composition as described above.
- a composition according to the invention can exhibit, in addition to lubricating properties, good electrical insulation properties.
- a composition according to the invention can simultaneously be used to lubricate one or more parts of a propulsion system of an electric or hybrid vehicle, in particular for lubricating the sensors and solenoid valves of the engine, bearings, but also the winding located at the rotor and stator of an electric motor, or the lubrication at the transmission level, in particular the gears, sensors, solenoid valves, or the reducer that we find in an electric or hybrid vehicle, and to electrically isolate at least one part of said propulsion system, in particular from the battery.
- a lubricating composition considered according to the invention advantageously exhibits a kinematic viscosity, measured at 100 ° C according to the ASTM D445 standard, of between 2 and 8 mm 2 / s, preferably between 3 and 7 mm 2 / s. It is understood that the uses described above can be combined, a composition as described above can be used both as a lubricant, as an electrical insulator and also as a cooling fluid for the engine, the battery. and the transmission of an electric or hybrid vehicle.
- composition according to the invention make it possible to define uses according to the invention which are also particular, advantageous or preferred.
- composition C1 comprising an amine and sulfur antiwear additive, of the dimercaptothiadiazole type and free of additive of the succinimide type;
- a C2 composition comprising said anti-wear additive of dimercaptothiadiazole type, and a dispersant additive of succinimide type, in accordance with the invention, more precisely a bis-succinimide of the following formula:
- a C3 composition comprising said anti-wear additive of dimercaptothiadiazole type, and a dispersant additive of succinimide type, in accordance with the invention, more specifically a succinimide PIB of high molecular weight,
- a C4 composition comprising said anti-wear additive of dimercaptothiadiazole type, and a dispersant additive of succinimide type, in accordance with the invention, more specifically a succinimide PIB of the following formula:
- Compositions C1 to C4 comprise, in addition to the aforementioned compounds, a group V base oil.
- compositions and the amounts are indicated in Table 2 below.
- the corrosive (or corroding) power of a composition can be evaluated according to a test implementing the study of the variation in the value of the electrical resistance of a copper wire having a predetermined diameter, as a function of the duration d immersion of this thread within the composition.
- the variation in the value of this electrical resistance is correlated directly with the variation in the diameter of the wire tested.
- the diameter of the wire chosen is 70 ⁇ m.
- compositions C2 to C4 being compositions according to the invention and composition C1 being a composition serving as comparative).
- the resistance of the wire is measured using an ohmmeter.
- the measurement current is 1mA.
- the temperature of the composition to be tested is brought to 150 ° C.
- the resistance of the copper wire is calculated by this equation (1):
- R is the resistance
- p is the resistivity of copper
- L is the length of the wire
- S is the section area
- the wire diameter is calculated from the section area (equation (2)):
- D is the diameter of the wire.
- the diameter of the wire decreases, therefore causing an increase in the value of the resistance.
- the wire diameter loss is therefore calculated directly from the measured resistance. When the measured resistance is infinite, it is an open circuit. So the wire broke, which defines very severe corrosion.
- a composition is “non-corrosive” when the loss of diameter of the copper wire studied is less than or equal to 1.3 ⁇ m after immersion for 80 hours, in particular less than or equal to 0.8 ⁇ m after immersion. for 40 hours in the composition comprising said compound.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1907138A FR3097873B1 (fr) | 2019-06-28 | 2019-06-28 | Utilisation d’un composé de type succinimide à titre d’additif anti-corrosion dans une composition lubrifiante destinée à un système de propulsion d’un véhicule électrique ou hybride. |
| PCT/EP2020/067820 WO2020260458A1 (fr) | 2019-06-28 | 2020-06-25 | Utilisation d'un compose de type succinimide a titre d'additif anti-corrosion dans une composition lubrifiante destinee a un systeme de propulsion d'un vehicule electrique ou hybride. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3990593A1 true EP3990593A1 (fr) | 2022-05-04 |
| EP3990593B1 EP3990593B1 (fr) | 2025-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20736592.5A Active EP3990593B1 (fr) | 2019-06-28 | 2020-06-25 | Utilisation d'un compose de type succinimide a titre d'additif anti-corrosion dans une composition lubrifiante destinee a un systeme de propulsion d'un vehicule electrique ou hybride |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20220364010A1 (fr) |
| EP (1) | EP3990593B1 (fr) |
| JP (1) | JP2022538637A (fr) |
| KR (1) | KR20220032057A (fr) |
| CN (1) | CN114096645B (fr) |
| ES (1) | ES3016817T3 (fr) |
| FR (1) | FR3097873B1 (fr) |
| MX (1) | MX2021015548A (fr) |
| WO (1) | WO2020260458A1 (fr) |
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| FR3097871B1 (fr) | 2019-06-28 | 2022-01-14 | Total Marketing Services | Utilisation d’un composé de type triazole à titre d’additif pour améliorer les propriétés anti-corrosiond’une composition lubrifiante |
| FR3109942B1 (fr) * | 2020-05-05 | 2022-08-19 | Total Marketing Services | Composition lubrifiante pour vehicules electriques |
| US11479735B2 (en) * | 2021-03-19 | 2022-10-25 | Afton Chemical GmbH | Lubricating and cooling fluid for an electric motor system |
| US11820955B2 (en) * | 2022-02-28 | 2023-11-21 | International Petroleum Products & Additives Company, Inc. | Dispersants derived from aromatic polyamines, lubricants, and methods |
| WO2024112665A1 (fr) | 2022-11-23 | 2024-05-30 | The Lubrizol Corporation | Lubrifiant pour groupe motopropulseur contenant un polyéther |
| US12043817B1 (en) | 2023-06-27 | 2024-07-23 | Afton Chemical Corporation | Low viscosity lubricating fluid for an electric motor system |
| US11939551B1 (en) | 2023-06-27 | 2024-03-26 | Afton Chemical Corporation | Lubricating fluid for an electric motor system |
| WO2025230512A1 (fr) | 2024-04-30 | 2025-11-06 | The Lubrizol Corporation | Lubrifiant pour groupe motopropulseur contenant un polyéther |
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| US4661273A (en) * | 1985-12-30 | 1987-04-28 | Mobil Oil Company | Mercapto-thiadiazole reaction products as multifunctional lubricant additives and compositions thereof |
| RO111107B1 (ro) * | 1992-10-22 | 1996-06-28 | Inst De Cercetari Pentru Rafin | Aditivi dispersanți, pentru uleiuri de motoare și procedeu de preparare a acestora |
| US6001780A (en) * | 1998-06-30 | 1999-12-14 | Chevron Chemical Company Llc | Ashless lubricating oil formulation for natural gas engines |
| US20030224948A1 (en) * | 2002-02-14 | 2003-12-04 | Dam Willem Van | Lubricating oil additive comprising EC-treated succinimide, borated dispersant and corrosion inhibitor |
| US8921287B2 (en) * | 2005-11-02 | 2014-12-30 | Nippon Oil Corporation | Lubricating oil composition |
| US20080194442A1 (en) * | 2007-02-13 | 2008-08-14 | Watts Raymond F | Methods for lubricating a transmission |
| CN104204165A (zh) * | 2012-03-21 | 2014-12-10 | 出光兴产株式会社 | 内燃机油用润滑油组合物 |
| FR3000103B1 (fr) | 2012-12-21 | 2015-04-03 | Total Raffinage Marketing | Composition lubrifiante a base d'ether de polyglycerol |
| US20180100120A1 (en) * | 2016-10-07 | 2018-04-12 | Exxonmobil Research And Engineering Company | Method for preventing or minimizing electrostatic discharge and dielectric breakdown in electric vehicle powertrains |
| EP3315590A1 (fr) * | 2016-10-27 | 2018-05-02 | Total Marketing Services | Utilisation de fluides d'hydrocarbure dans des véhicules électriques |
-
2019
- 2019-06-28 FR FR1907138A patent/FR3097873B1/fr active Active
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2020
- 2020-06-25 WO PCT/EP2020/067820 patent/WO2020260458A1/fr not_active Ceased
- 2020-06-25 ES ES20736592T patent/ES3016817T3/es active Active
- 2020-06-25 MX MX2021015548A patent/MX2021015548A/es unknown
- 2020-06-25 EP EP20736592.5A patent/EP3990593B1/fr active Active
- 2020-06-25 JP JP2021577601A patent/JP2022538637A/ja active Pending
- 2020-06-25 KR KR1020227001741A patent/KR20220032057A/ko not_active Withdrawn
- 2020-06-25 US US17/619,859 patent/US20220364010A1/en not_active Abandoned
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| Publication number | Publication date |
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| US20220364010A1 (en) | 2022-11-17 |
| CN114096645B (zh) | 2023-05-09 |
| ES3016817T3 (en) | 2025-05-09 |
| FR3097873B1 (fr) | 2022-01-14 |
| MX2021015548A (es) | 2022-04-25 |
| CN114096645A (zh) | 2022-02-25 |
| FR3097873A1 (fr) | 2021-01-01 |
| KR20220032057A (ko) | 2022-03-15 |
| JP2022538637A (ja) | 2022-09-05 |
| EP3990593B1 (fr) | 2025-03-12 |
| WO2020260458A1 (fr) | 2020-12-30 |
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