EP4168517A1 - Composition aqueuse pour la lubrification des systemes mecaniques - Google Patents
Composition aqueuse pour la lubrification des systemes mecaniquesInfo
- Publication number
- EP4168517A1 EP4168517A1 EP21733141.2A EP21733141A EP4168517A1 EP 4168517 A1 EP4168517 A1 EP 4168517A1 EP 21733141 A EP21733141 A EP 21733141A EP 4168517 A1 EP4168517 A1 EP 4168517A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- aqueous
- weight
- composition according
- lubricating composition
- 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.)
- Pending
Links
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
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
- C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/025—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with condensed rings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—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
- C10N2040/20—Metal working
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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 intended for the lubrication of mechanical systems, such as bearings, gears, bearings or motors. It aims more particularly to provide new aqueous lubricants.
- Lubricating compositions also called “lubricants”, are commonly used in mechanical systems, to reduce the friction between the parts and thus protect the parts against wear. In addition to the phenomena of wear, friction can oppose the relative movement of the parts in contact and induce energy losses detrimental to optimal operation of the mechanical system.
- Lubricants are used for multiple applications, for example for metalworking, in particular for metal deformation operations, for gas or steam turbines in the fields of aeronautics, naval, rail transport. and power generation, for propulsion systems of motor vehicles, for example for the lubrication of bearings, gears, an engine, etc.
- hydrocarbon-based lubricants are hydrocarbon-based lubricants. These hydrocarbon lubricants are conventionally composed of one or more base oils, which are generally associated with additives dedicated to stimulate the lubricating performance of base oils, such as friction modifying additives, for example.
- This cooling is typically provided by a cooling fluid, distinct from the hydrocarbon lubricant, such as, for example, air, an aqueous fluid, such as water or even a mixture of water and a glycol.
- a cooling fluid distinct from the hydrocarbon lubricant, such as, for example, air, an aqueous fluid, such as water or even a mixture of water and a glycol.
- Lubricating compositions based on water have already been studied.
- document US 2012/0149616 proposes an aqueous lubricant comprising, in addition to water, water-soluble polyalkylene glycols, emulsifiers, antifreeze additives of alkylene glycol or glycerol type, anti-corrosion additives, anti-foam additives and friction reducing additives.
- the present invention aims to provide a new water-based composition, exhibiting tribological properties suitable for its use for the lubrication of mechanical systems.
- the present invention relates, according to a first of its aspects, to an aqueous lubricating composition for the lubrication of moving parts in a mechanical system, comprising at least:
- - water preferably deionized water
- aqueous composition is intended to denote a composition comprising water as base fluid, in other words as predominant solvent.
- the water preferably deionized, preferably represents more than 35% by mass of the total mass of the lubricating composition.
- aqueous lubricant composition or "aqueous lubricant” will denote a lubricating composition according to the invention, intended to lubricate moving parts in a mechanical system.
- osmosis water is intended to denote water which has undergone purification, in particular by a reverse osmosis process, in order to reduce the content of organic and / or mineral compounds, for example to a lower content. at 5.0% by weight, preferably less than 1.0% by weight.
- the expressions “demineralized water” or even “ultrapure water” will be considered as equivalent or synonymous with the expression “reverse osmosis water”.
- the reverse osmosis water can be “deionized water”, in other words water which has undergone purification in order to reduce the content of ions, such as the Ca 2+ and HCO3 ions generally present in the water.
- deionized water does not contain ions.
- Hypericin is a natural pigment found in certain species of insects and plants of the genus Hypericum, the common plant of which is St. John's Wort. Hypericin is an aromatic polycyclic dione compound exhibiting numerous biological activities. It has long been known to use hypericin in traditional medicine, for example in the treatment of depression and in healing wounds. In addition, hypericin is also known as an antiviral, antibacterial and anti-tumor agent, as well as a photosensitizer in the diagnosis and therapy of tumors.
- an aqueous composition according to the invention exhibits good properties in terms of resistance to wear and reduction of friction between moving parts in a mechanical system.
- the present invention also relates to the use of hypericin as an additive for improving the tribological properties, in particular in terms of reducing friction and resistance to wear, of an aqueous composition further comprising in less water and glycerol, in particular comprising at least 35% by weight of water and at least 20% by weight of glycerol, relative to the total weight of the composition.
- aqueous compositions according to the invention thus prove to be suitable for use as lubricants for the lubrication of moving parts in a mechanical system. They can thus be used in all systems and for all applications, replacing conventional hydrocarbon lubricants. Examples of application are given in the remainder of the text.
- the present invention relates to the use of an aqueous lubricating composition according to the invention for the lubrication of moving parts in a mechanical system, in particular in a vehicle propulsion system, and more particularly at the transmission part of a vehicle propulsion system.
- the invention also relates, according to another of its aspects, to a method of lubricating a mechanical system (or parts in a mechanical system), comprising at least one step of bringing at least one part of said mechanical system into contact. with an aqueous lubricating composition according to the invention.
- a composition according to the invention thus combines good cooling properties linked to the presence of water, and good tribological properties, in particular reduction of friction and resistance to wear.
- an aqueous composition according to the invention can advantageously perform the dual function of lubrication and cooling.
- the present invention also relates to the use of an aqueous lubricating composition according to the invention, for the lubrication and cooling of moving parts in a mechanical system, in particular in a vehicle propulsion system.
- a composition according to the invention has the advantage of being easy to formulate. It has, in addition to the joint cooling and lubricating properties, good stability. Advantageously, it also has good anticorrosion properties.
- Other characteristics, variants and advantages of an aqueous lubricating composition according to the invention will emerge more clearly on reading the description and the examples which follow, given by way of illustration and without limitation of the invention.
- the percentages are weight percentages. The percentages are therefore expressed by mass relative to the total mass of the composition. Temperature is expressed in degrees Celsius unless otherwise specified, and pressure is atmospheric pressure, unless otherwise specified.
- an aqueous lubricating composition according to the invention is a formulation comprising water as the main solvent.
- an aqueous lubricating composition according to the invention comprises at least 35% by mass of water, preferably between 35% and 90% by mass, more preferably between 40% and 75% by mass, relative to the total mass of the composition. .
- water in addition to its role as a solvent, water provides access to a lubricating composition exhibiting good cooling properties, and which can be used as a cooling fluid for moving parts in a mechanical system.
- the water used in an aqueous lubricating composition according to the invention is deionized water, also called demineralized water.
- Deionized water does not contain ions, such as the Ca 2+ and HCO3 ions commonly found in water, which are responsible for the conduction of electricity in water.
- deionized water is therefore particularly advantageous in the context of the use of the aqueous lubricant according to the invention for applications requiring a fluid which conducts little, if at all, electricity, such as for example for use of aqueous lubricant for the lubrication and cooling of systems mechanical devices comprising an electrical circuit, for example electric or hybrid motors, in particular in electric or hybrid vehicles.
- An aqueous lubricating composition according to the invention therefore differs from lubricants conventionally used in mechanical systems, which comprise a majority proportion of one or more oils which are insoluble in water.
- oil insoluble in water is meant in particular an oil which does not dissolve substantially in water at room temperature (at about 25 ° C).
- an oil which is insoluble in water has a solubility in water of less than 0.2 g / L at room temperature.
- an aqueous lubricating composition according to the present invention comprises less than 5% by mass of oil (s) insoluble in water, preferably less than 2% by mass, more preferably less than 1% by mass, by relative to the total mass of the composition.
- an aqueous lubricating composition according to the invention is completely free from oil which is insoluble in water.
- an aqueous lubricating composition according to the invention uses hypericin.
- Hypericin also called l, 3,4,6,8,13-hexahydroxy-10, ll- dimcthylphcnanthroj 1, 10,9,8-oc / ra] pcrylcnc-7, 14-dionc or 4,5,7 , 4 ', 5', 7'-Hexahydroxy- 2,2'-dimethylnaphthodianthrone, is a compound formed of eight conjugated rings containing six hydroxyl groups, two carbonyl groups and two methyl groups, having the following chemical structure: Hypericin can be obtained by any process known to those skilled in the art.
- Hypericum perforatum also known as St John's Wort or St. John's Wort
- St John's Wort is a rich source of hypericin.
- Hypericum extracts can be easily prepared by extraction with an organic solvent, such as acetone, acetonitrile, dichloromethane, ethyl acetate, ethanol, hexane, isopropanol, methanol, or by extraction with a supercritical fluid, such as carbon dioxide in the supercritical state.
- an organic solvent such as acetone, acetonitrile, dichloromethane, ethyl acetate, ethanol, hexane, isopropanol, methanol
- a supercritical fluid such as carbon dioxide in the supercritical state.
- hypericin can be synthesized in the laboratory, according to synthetic methods known to those skilled in the art, such as described for example in documents WO 2017/151111, US 5,120,412 and EP 0432496.
- Hypericin may still be commercially available, for example from the company Sigma Aldrich.
- the hypericin used according to the invention is generally in the form of a powder.
- hypericin is used in an aqueous lubricating composition according to the invention in an amount of 0.01% to 5.0% by weight, preferably from 0.05% to 3.5% by weight and more preferably from 0.1% to 1.5% by mass, relative to the total mass of the composition.
- a lubricating composition according to the invention can comprise water and hypericin in a water: hypericin mass ratio ranging from 100: 1 to 200: 1, in particular from 120: 1 to 150: 1.
- an aqueous lubricating composition according to the invention can comprise one or more compounds chosen from polycyclic dianthraquinones, preferably from hypericin and its derivatives.
- the compounds of polycyclic dianthraquinone type can correspond more particularly to the following formula (I): in which :
- R ⁇ , R 7 and R 12 are chosen, independently of one another, from -H, -OH, -OR and -0 (C0) R;
- - R3, R4, R9 and Rio are chosen, independently of each other, from -H, -R, -OH, -OR, -0 (C0) R, -CH2-OH, -CH2-OR, CH 2 - 0 (C0) R, -COOH and -COOR, preferably from -H, -OH, -OR, -0 (C0) R, -CH2-OH, -CH2-OR and CH 2 -0 (C0) R;
- R 2 , R 5 , Rs and R 11 are chosen, independently of each other, from -H, -R, -F, -Cl, - Br, -I and -SO3H, preferably from -H and -R ;
- - R is an alkyl group, in particular comprising from 1 to 10 carbon atoms.
- an aqueous lubricating composition according to the invention may comprise at least water, glycerol and at least one compound of polycyclic dianthraquinone type, in particular chosen from hypericin and its derivatives, and more particularly of formula (I) as defined above.
- the said compound (s) of polycyclic dianthraquinone type, in particular chosen from hypericin and its derivatives can be used in an amount of 0.01% to 5.0% by mass, preferably from 0.05% to 3.5% by weight and more preferably from 0.1% to 1.5% by weight, relative to the total weight of the composition.
- an aqueous lubricating composition according to the invention comprises at least glycerol.
- Glycerol is an organic molecule comprising three free hydroxyl groups, of the following formula:
- an aqueous lubricating composition according to the invention can comprise at least 20% by weight of glycerol, preferably between 20% and 75% by weight, more preferably between 30% and 50% by weight, relative to the total weight of the composition.
- a lubricating composition according to the invention can comprise water and glycerol in a water: glycerol mass ratio ranging from 0.5: 1 to 2: 1.
- a lubricating composition according to the invention can comprise glycerol and hypericin in a glycerol: hypericin mass ratio ranging from 50: 1 to 300: 1, in particular from 100: 1 to 200: 1.
- polyol type in particular chosen from glycols and polyalkylene glycols.
- an aqueous lubricating composition according to the invention can comprise one or more polyols, in particular chosen from glycerol, glycols, polyalkylene glycols and their mixtures.
- Glycols are diols in which the two hydroxyl groups are carried by different carbon atoms, preferably by vicinal carbon atoms.
- the glycols are alkylene glycols, in particular having 2 to 10 carbon atoms, in particular 2 to 6 carbon atoms.
- monoethylene glycol, diethylene glycol and propylene glycol there may be mentioned monoethylene glycol, diethylene glycol and propylene glycol.
- the polyalkylene glycols are chosen from water-soluble polyalkylene glycols.
- water-soluble is intended to denote a polyalkylene glycol having a solubility in water of at least 10 g / L, preferably of at least 500 g / L, in water at ambient temperature (approximately 25 ° C).
- the polyalkylene glycols can be more particularly formed of C1-C4, preferably C1-C3, more particularly C2-C3 alkylene oxide units.
- a polyalkylene glycol used in an aqueous lubricating composition according to the invention comprises at least 50% by weight, in particular at least 80% by weight, more preferably at least 90% by weight of propylene oxide and / or oxide units.
- 'ethylene It may be an ethylene oxide / propylene oxide random copolymer.
- a polyalkylene glycol used in an aqueous lubricating composition according to the invention has a kinematic viscosity measured at 100 ° C (KV100), according to the ASTM D445 standard, of between 100 and 5000 mm 2 / s, in particular between 150 and 3000 mm 2 / s.
- KV100 kinematic viscosity measured at 100 ° C
- a polyalkylene glycol used in an aqueous lubricating composition according to the invention has a kinematic viscosity measured at 40 ° C (KV40), according to the ASTM D445 standard, between 500 and 30,000 mm 2 / s, more particularly between 1,000 and 25,000 mm 2 / s.
- KV40 kinematic viscosity measured at 40 ° C
- the flash point of a polyalkylene glycol used in an aqueous lubricating composition according to the invention is preferably greater than or equal to 160 ° C, in particular greater than or equal to 220 ° C.
- the flash point can be measured by ISO 2592 or ASTM D92.
- a polyalkylene glycol used in an aqueous lubricating composition according to the invention has a viscosity index measured according to standard ASTM D2270, of between 100 and 800, preferably between 250 and 550.
- an aqueous lubricating composition according to the invention can comprise at least water, at least one compound of polyol type chosen from glycerol, glycols in particular alkylene glycols, polyalkylene glycols and their mixtures. , preferably chosen from glycerol and polyalkylene glycols as defined above, and hypericin.
- the said compound (s) of polyol type can be used in an amount of at least 20% by weight, preferably between 20% and 75% by weight, more preferably between 30% and 50% by weight, relative to the weight total composition.
- an aqueous lubricating composition according to the invention comprises at least:
- At least one compound of polycyclic dianthraquinone type in particular chosen from hypericin and its derivatives, and more particularly of formula (I) as defined above, preferably hypericin.
- An aqueous lubricating composition according to the invention can further comprise various additives.
- additives are compatible with their use in an aqueous medium.
- the additives are used in a form soluble or emulsifiable in water, for example in the form of salts or ionic liquids.
- Said additive or additives are of course chosen with regard to the intended application for the aqueous lubricant.
- a person skilled in the art will take care to choose the optional additives and / or their quantity in such a way that the advantageous properties of the aqueous lubricating composition according to the invention, in particular the tribological properties, in particular of reduction of friction and protection of parts against wear, and cooling, are not affected by the addition envisaged.
- Such additives can be more particularly chosen from anti-foam agents, biocides, pH regulators, corrosion inhibitors, anti-wear and / or extreme pressure additives, sequestering agents, metal passivators, colorants, dispersants, emulsifying agents, and mixtures thereof.
- an aqueous lubricating composition according to the invention can comprise one or more additives chosen from anti-foam agents, extreme pressure agents, corrosion inhibitors, pH regulators, metal passivators, colorants, and their mixtures.
- An aqueous lubricating composition according to the invention may more particularly comprise from 0.1 to 10% by mass of additives, in particular from 1.0 to 8.0% by mass of additives, relative to the total mass of the composition.
- An aqueous lubricating composition according to the invention can comprise at least one corrosion inhibitor agent.
- Corrosion inhibitors advantageously reduce or even prevent corrosion of metal parts.
- the nature of said corrosion inhibitor (s) can be chosen with regard to the metal to be protected against corrosion, such as aluminum, steel, galvanized steel, yellow metals, for example copper or brass.
- the inorganic corrosion inhibitors may be mentioned nitrites, sulphites, silicates, borates, sodium, potassium, calcium or magnesium phosphates, alkali metal phosphates, hydroxides, molybdates, sulphates of zinc, magnesium or nickel.
- alkanolamines such as triethanolamine
- aliphatic monocarboxylic acids in particular having from 4 to 15 carbon atoms, for example octanoic acid
- aliphatic dicarboxylic acids having from 4 to 15 atoms.
- carbon for example decane dioic acid, undecane dioic acid, dodecane dioic acid or their mixtures
- polycarboxylic acids optionally neutralized with triethanolamine, such as l, 3,5-triazine-2 acid, 4,6-tri- (6-aminocaproic acid), alkanoylamidocarboxylic acids, in particular acid isononanoylamidocaproic acid, and mixtures thereof.
- Borated amides, products of the reaction of amines or amino alcohols with boric acid can also be used.
- An aqueous lubricating composition according to the invention can in particular comprise from 0.1% to 5.0% by mass of corrosion inhibitor (s), preferably from 0.5% to 4.0% by mass, more preferably from 1, 0% to 2.5% by mass, relative to the total mass of the composition.
- corrosion inhibitor s
- An aqueous lubricating composition according to the invention can comprise at least one antiwear and / or extreme pressure additive. Their function is to reduce wear and the coefficient of friction, or to prevent metal-to-metal contact by forming a protective film adsorbed on these surfaces.
- anti-wear additives there is a wide variety of anti-wear additives, among which may be mentioned those chosen from phosphosulfur additives such as metal alkylthiophosphates or their salts.
- Amine phosphates are also antiwear additives which can be used in a composition according to the invention.
- Additives which do not provide phosphorus may also be suitable, such as, for example, polysulfides, in particular sulfur-containing olefins.
- extreme pressure additives suitable for the present invention there may be mentioned water-soluble extreme pressure additives, such as 2,5-dimercapto-l, 3,4-thiadiazole (DMTD) or one of its salts, in in particular a disodium salt (NaDMTD).
- DMTD 2,5-dimercapto-l, 3,4-thiadiazole
- NaDMTD disodium salt
- An aqueous lubricating composition according to the invention can comprise between 0.01% and 10% by mass of anti-wear and / or extreme pressure additive (s) as defined above, preferably between 0.5% and 5. , 0% by mass, relative to the total mass of the composition.
- An aqueous lubricating composition according to the invention can comprise at least one anti-foam additive. Antifoams help prevent foaming of the lubricating fluid.
- the anti-foaming agent may, for example, be an anti-foaming agent based on polysiloxanes or on acrylate polymers.
- the anti-foam agent is chosen from three-dimensional siloxanes.
- the anti-foaming agents can be polar polymers such as polymethylsiloxanes or polyacrylates.
- an aqueous lubricating composition according to the invention may comprise from 0.001% to 3.0% by weight of anti-foaming additive (s), preferably from 0.005% to 1.5% by weight, more preferably from 0.01 % to 1.0% by mass, relative to the total mass of the lubricating composition.
- anti-foaming additive s
- An aqueous lubricating composition according to the invention can comprise at least one pH regulating additive, in particular an alkaline buffer.
- the pH regulator makes it possible to maintain the desired pH of the lubricating composition, in particular in order to preserve an alkaline pH, advantageously between 8 and 11, so in particular to prevent corrosion of the metal surfaces.
- the pH regulator can be chosen from the family of amines, in particular alkanolamines and amino alcohols.
- ethanolamines such as monoethanolamine (MEA), diethanolamine (DEA); triethanolamine (TEA), diglycolamine (DGA) isopropanolamines, such as mono-isopropanolamine (MIPA), diisopropanolamine (DIPA) and triisopropanolamine (TIPA), ethylene amines, such as ethylene diamine (EDA), diethylene triamine (DETA), triethylene tetramine (TETA) and tetraethylene pentamine (TEPA), alkanolamines, such as methyldiethanol amine (MDEA), cyclamines, such as cyclohexylamine, 2-amino-2-ethyl- 1,3-propanediol, 2-amino-2-methyl-1-propanol and mixtures thereof.
- MIPA monoethanolamine
- DGA diglycolamine
- MIPA mono-isopropanolamine
- DIPA diisopropanolamine
- TIPA triiso
- An aqueous lubricating composition according to the invention can in particular comprise from 0.1% to 10% by mass of additive (s) regulating the pH, preferably from 0.5% to 5.0% by mass, relative to the total mass of the composition.
- An aqueous lubricating composition according to the invention can comprise at least one metal passivating agent.
- Metal passivators protect metal parts by promoting the formation of metal oxide on their surface.
- the metal passivating agents can for example be chosen from triazole derivatives, such as tetrahydrobenzotriazole (THBTZ), tolyltryazole (TTZ), benzotriazole (BTZ), amines substituted with a triazole group, such as N, N -bis (2-ethylhexyl) -l, 2,4-triazol-1-yl methanamine, N'-bis (2 ethylhexyl) -4-methyl-1H-benzotriazol-1-methyl-amine, N, N- bis (heptyl) -ar-methyl-1H-benzotriazole-l- methanamine, N, N-bis (nonyl) -ar-methyl- IH-benzo triazole- 1 -methanamine, N, N-
- the metal passivating agents are chosen from tetrahydrobenzotriazole (THBTZ), tolyltriazole (TTZ), benzotriazole (BTZ), and their salts, taken alone or as mixtures.
- An aqueous lubricating composition according to the invention may in particular comprise from 0.01% to 2.0% by weight of metal passivating agent (s), preferably from 0.1% to 1.0% by weight, relative to the total mass of the composition
- An aqueous lubricating composition according to the invention can comprise one or more dyes.
- the dyes can be natural or synthetic, generally organic.
- the dyes which can be used in an aqueous lubricating composition can be more particularly chosen from natural or synthetic water-soluble dyes, for example the dyes FDC Red 4, DC Red 6, DC Red 22, DC Red 28, DC Red 30, DC Red 33, DC Orange 4, DC Yellow 5, DC Yellow 6, DC Yellow 8, FDC Green 3, DC Green 5, FDC Blue 1, betanin (beet), carmine, a chlorophyllin, methylene blue, anthocyanins (enocianin, black carrot and hibiscus), caramel and riboflavin.
- An aqueous lubricating composition according to the invention can comprise between 0.01% and 2.0% by mass of dye (s), preferably between 0.01% and 1.5% by mass, more preferably between 0.02% and 1. , 0% by mass, relative to the total mass of the composition.
- An aqueous lubricating composition according to the invention can comprise one or more emulsifying agents, also called emulsifiers. Their function is to generate stable emulsions in water.
- the emulsifying agents can be more particularly nonionic, such as, for example, ethoxylated fatty alcohols, ethoxylated fatty acids, ethoxylated fatty amides; anionic, for example KOH, NaOH soaps; sulphonates; cationic, such as quaternary ammonium compounds; or else water-soluble or emulsifiable carboxylic acid esters.
- an aqueous lubricating composition according to the invention can comprise from 0.01% to 10% by mass of emulsifying agent (s), preferably from 0.1% to 5.0% by mass, relative to the total mass. of the lubricating composition.
- emulsifying agent s
- An aqueous lubricating composition according to the invention can comprise at least one sequestering agent.
- Sequestering agents also called chelating agents, limit the encrustation of metal ions in the composition.
- sequestering agents examples include those derived from phosphonic acids and phosphonates, such as diethylenetriaminepentamethyl phosphonic acid (DTPMPA), amino tri (methylene phosphonic) acid (ATMP), acid hydroxyethane- diphosphonic acid (HEDP), 1-hydroxylethylidene 1,1-diphosphonate, 2-hydroxyethylamine di (methylene phosphonic) acid (HEAMBP), diethylene triamino penta (methylene phosphonic) (DTMP), organic acids multifunctional and hydroxy acids, such as ethylenediaminetetraacetic acid (EDTA), pteroyl- L-glutamic acid (PGLU), organic polyacids, such as maleic acid and polyaspartic acid, polysaccharides and carbohydrates, such as inulin, carboxymethylinulin and carboxymethylchitosan.
- DTPMPA diethylenetriaminepentamethyl phosphonic acid
- ATMP amino tri (methylene phosphonic) acid
- An aqueous lubricating composition according to the invention can comprise from 0.001% to 2.0% by mass of sequestering agent (s), preferably from 0.01% to 1.0% by mass, relative to the total mass of the composition. .
- An aqueous lubricating composition according to the invention can comprise at least one biocidal and / or fungicidal agent.
- Biocides and fungicides can be used to improve the biological stability of the composition by limiting the proliferation of bacteria, fungi and yeasts in the lubricating fluid.
- Such biocides can be chosen from parabens, aldehydes, reactive acetylacetone compounds, isothiazolinones, phenolic compounds, acid salts, halogenated compounds, quaternary ammoniums, certain alcohols and their mixtures.
- the biocides can be chosen from optionally substituted benzisothiazolinones (BIT), such as N-butyl-1,2-benzisothiazolin-3-one, methylisothiazolinones (MIT), mixtures of methylisothiazolinone and chloromethylisothiazolinone (MIT / CMIT), orthophenyl-phenol (OPP) or its sodium salt, 3-iodo-2-propynylbutylcarbamate (IPBC), chloro-cresol and N, N-methylene-bis-morpholine (MBM); sorbic acid; preferably from orthophenyl-phenol (OPP) or its sodium salt, 3-iodo-2-propynylbutylcarbamate, chloro-cresol, benzisothiazolinones and N, N-methylene-isomorpholine.
- BIT optionally substituted benzisothiazolinones
- BIT optionally substituted benzisothiazolin
- An aqueous lubricating composition according to the invention may in particular comprise between 0.01% and 10% by mass of biocide (s) and / or fungicide (s), preferably between 0.5% and 5.0% by mass, relative to the total mass of the composition.
- a lubricating composition according to the invention has a kinematic viscosity, measured at 40 ° C (KV40), according to the standard ASTM D445 (ISO 3104) ranging from 500 to 2000 mm 2 / s, in particular from 800 to 1200 mm 2 / s.
- a lubricating composition according to the invention has a kinematic viscosity, measured at 100 ° C (KV100), according to the standard ASTM D445 (ISO 3104) ranging from 30 to 70 mm 2 / s, in particular from 40 to 60 mm 2 / s.
- an aqueous lubricating composition according to the invention comprises:
- water in particular deionized water, preferably between 35% and 90% by mass, more preferably between 40% and 75% by mass;
- glycerol preferably between 20% and 75% by weight, more preferably between 30% and 50% by weight;
- hypericin preferably from 0.01% to 5.0% by weight of hypericin, preferably from 0.05% to 3.5% by weight, more preferably from 0.1% to 1.5% by weight, the contents being expressed relative to to the total mass of the lubricating composition.
- an aqueous lubricating composition according to the invention comprises:
- additives chosen from anti-foaming agents, extreme pressure agents, corrosion inhibitors, pH regulators, metal passivating agents, colorants, emulsifying agents, sequestering agents, and mixtures thereof, the contents being expressed relative to the total mass of the lubricating composition.
- an aqueous lubricating composition according to the invention may consist of:
- additives chosen from anti-foaming agents, extreme pressure agents, corrosion inhibitors, pH regulators, metal passivators, colorants, emulsifying agents, sequestering agents, and mixtures thereof, the contents being expressed relative to the total mass of the lubricating composition; the remainder consisting of water, preferably deionized water.
- an aqueous lubricating composition according to the invention can comprise:
- glycerol at least 20% by weight of one or more compounds of polyol type chosen from glycerol, glycols in particular alkylene glycols, polyalkylene glycols and their mixtures, preferably chosen from glycerol and polyalkylene glycols as defined above; preferably glycerol; and
- an aqueous lubricating composition according to the invention may consist of:
- glycerol at least 20% by weight of one or more compounds of polyol type chosen from glycerol, glycols in particular alkylene glycols, polyalkylene glycols and their mixtures, preferably chosen from glycerol and polyalkylene glycols as defined above; preferably glycerol; and
- the present invention thus relates to the use of at least one compound of polycyclic dianthraquinone type, chosen from hypericin and its derivatives, and more particularly of formula (I) as defined above, preferably hypericin, as an additive for improving the tribological properties, in particular in terms of friction reduction and wear resistance, of an aqueous composition comprising at least water and at least one compound of polyol type chosen from among glycerol, glycols in particular alkylene glycols, polyalkylene glycols and their mixtures, preferably chosen from glycerol and polyalkylene glycols as defined above; preferably glycerol.
- polyol type chosen from among glycerol, glycols in particular alkylene glycols, polyalkylene glycols and their mixtures, preferably chosen from glycerol and polyalkylene glycols as defined above; preferably glycerol.
- an aqueous lubricating composition formulated according to the invention exhibits excellent tribological properties, in particular in terms of reduction of friction and resistance to wear, which makes it particularly well suited. for use as a lubricating fluid.
- Aqueous lubricating compositions can find various applications. In general, they can be used as lubricating fluid for systems and applications, replacing conventional hydrocarbon lubricants.
- An aqueous lubricating composition according to the invention can thus be used for the lubrication of gears, bearings, bearings, such as rolling or sliding bearings or even motors.
- an aqueous lubricating composition according to the invention can be used for the lubrication of an engine, in particular of an internal combustion engine, for example of a vehicle engine. It advantageously reduces wear on engine parts.
- an aqueous lubricating composition according to the invention can be used for working metals, for example for the transformation of metals, for example aluminum, steel, galvanized steel, yellow metals.
- a lubricating composition according to the invention formed predominantly of water, has little toxicological impact, in particular for people using this lubricant.
- water is the solvent predominantly an aqueous lubricant according to the invention, the treated surface is properly lubricated.
- An aqueous lubricating composition according to the invention can also find an advantageous application for the lubrication of a propulsion system of an electric or hybrid vehicle, and more particularly of the engine, the electric power, the transmission and / or the transmission. drums.
- aqueous composition according to the invention can thus be used both as a cooling fluid and as a lubricant, for example in a motorization system of an electric or hybrid vehicle.
- a composition according to the invention allows joint access to good properties in terms of cooling and lubrication of parts of the motorization system of an electric or hybrid vehicle.
- a composition according to the invention makes it possible to cool and lubricate an electric motor of an electric or hybrid vehicle. It is particularly effective in cooling the power electronics and / or the rotor and / or the stator of an electric motor. It also lubricates the bearings located between the rotor and the stator of an electric motor of an electric or hybrid vehicle.
- a composition according to the invention makes it possible to ensure the lubrication of the transmission, when it is present, in particular the reduction gear, of an electric or hybrid vehicle. Also, a composition according to the invention advantageously makes it possible to effectively cool the battery present in an electric or hybrid vehicle.
- test conditions on the reciprocating ball-plane tribometer are:
- a reference composition (10), comprising only glycerol and water, and a composition in accordance with the invention (II), corresponding to the supplemented composition. with hypericin, were prepared by simple mixing, at room temperature, of the components indicated in Table 2. The percentages are expressed by mass relative to the total mass of the composition.
- composition in accordance with the invention (II) exhibits reduced wear and a coefficient of friction compared to the reference composition (10), not using hypericin.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2006497A FR3111640B1 (fr) | 2020-06-22 | 2020-06-22 | Composition aqueuse pour la lubrification des systèmes mécaniques |
| PCT/EP2021/066814 WO2021259851A1 (fr) | 2020-06-22 | 2021-06-21 | Composition aqueuse pour la lubrification des systemes mecaniques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4168517A1 true EP4168517A1 (fr) | 2023-04-26 |
Family
ID=72709524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21733141.2A Pending EP4168517A1 (fr) | 2020-06-22 | 2021-06-21 | Composition aqueuse pour la lubrification des systemes mecaniques |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240060001A1 (fr) |
| EP (1) | EP4168517A1 (fr) |
| CN (1) | CN116348577B (fr) |
| FR (1) | FR3111640B1 (fr) |
| WO (1) | WO2021259851A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3134814A1 (fr) | 2022-04-20 | 2023-10-27 | Totalenergies Onetech | Composition lubrifiante aqueuse comprenant un ester de l’acide gallique |
| FR3134813A1 (fr) | 2022-04-20 | 2023-10-27 | Totalenergies Onetech | Composition lubrifiante aqueuse comprenant un ester de l’acide ascorbique |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105168012A (zh) * | 2015-08-04 | 2015-12-23 | 苏州泽达兴邦医药科技有限公司 | 一种复方药物牙膏及制作方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8000569A (nl) * | 1979-04-10 | 1980-10-14 | Pennwalt Corp | Smeermiddel ten gebruike bij het vervormen, alsmede werkwijze voor het vervormen van ferro- en niet-ferrometalen onder toepassing van dit smeermiddel. |
| IL92315A (en) | 1989-11-15 | 1996-12-05 | Yeda Res & Dev | Preparation of Hypericin from Amodin Enron |
| US7195783B2 (en) | 1999-07-09 | 2007-03-27 | Fx Life Sciences International Gmbh | Hypericin and hypericum extract: specific T-type calcium channel blocker, and their use as T-type calcium channel targeted therapeutics |
| UA99147C2 (ru) * | 2007-10-02 | 2012-07-25 | Кус Гмбх | Косметическая или фармацевтическая композиция местного применения |
| DE102009039626A1 (de) | 2009-09-01 | 2011-03-03 | KLüBER LUBRICATION MüNCHEN KG | Schmierstoffe auf Wasserbasis |
| BR102015016064B1 (pt) * | 2015-07-02 | 2020-09-24 | Universidade De São Paulo - Usp | Composição cosmética oral à base de hipericina e uso da mesma |
| RU2719582C1 (ru) | 2016-03-01 | 2020-04-21 | Солидженикс, Инк. | Системы и способы для получения синтетического гиперицина |
| WO2017182182A1 (fr) * | 2016-04-21 | 2017-10-26 | Societe D'exploitation De Produits Pour Les Industries Chimiques Seppic | Extrait de feuilles de harungana madagascariensis destiné à être utilisé dans le traitement et/ou la prévention de l'acné |
-
2020
- 2020-06-22 FR FR2006497A patent/FR3111640B1/fr active Active
-
2021
- 2021-06-21 US US18/012,394 patent/US20240060001A1/en active Pending
- 2021-06-21 WO PCT/EP2021/066814 patent/WO2021259851A1/fr not_active Ceased
- 2021-06-21 CN CN202180051524.1A patent/CN116348577B/zh active Active
- 2021-06-21 EP EP21733141.2A patent/EP4168517A1/fr active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105168012A (zh) * | 2015-08-04 | 2015-12-23 | 苏州泽达兴邦医药科技有限公司 | 一种复方药物牙膏及制作方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021259851A1 (fr) | 2021-12-30 |
| CN116348577B (zh) | 2024-10-29 |
| FR3111640A1 (fr) | 2021-12-24 |
| FR3111640B1 (fr) | 2022-07-22 |
| CN116348577A (zh) | 2023-06-27 |
| US20240060001A1 (en) | 2024-02-22 |
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