Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
  • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M145/24—Polyethers
  • C10M145/26—Polyoxyalkylenes
  • C10M145/34—Polyoxyalkylenes of two or more specified different types
• • 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
  • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
  • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
  • C10M2209/1065—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/01—Physico-chemical properties
  • C10N2020/02—Viscosity; Viscosity index
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/01—Physico-chemical properties
  • C10N2020/04—Molecular weight; Molecular weight distribution
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/02—Pour-point; Viscosity index
• • 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
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/08—Resistance to extreme temperature
• • 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
  • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/54—Fuel economy
• • 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
  • C10N2030/68—Shear stability
• • 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

Definitions

• the present application relates to the field of lubricating compositions, more particularly the field of engine lubricating compositions, in particular motor vehicle engine, for transmission and for gearing. More particularly, the present application relates to the field of lubricating compositions for transmission and gearing.
• Lubricating compositions for transmission for example gearboxes or gearboxes
• gearboxes or gearboxes for gearing, in particular for industrial gearing
• driving comfort perfect gearshift, quiet operation, trouble-free operation, high reliability
• service life of the assembly for the service life of the assembly
• consideration of environmental aspects lower fuel consumption, reduced lubricant consumption, low noise, easy evacuation.
• ATF oils for automatic transmission fluids are very specific and relate in particular to a great constancy of the coefficient of friction during all the length of stay for an optimal gearshift, an excellent stability to the aging for long emptying intervals, good viscosity-temperature performance to ensure perfect operation with a hot engine and a cold engine and sufficient sealing compatibility with different elastomers used in the transmission seals so that they do not swell not, do not shrink and do not become fragile.
• the search for the reduction of C0 2 emissions makes it necessary to develop products that make it possible to reduce friction in gearboxes and in bridge differentials.
• Polyalphaolefins are also used because they have good shear stability, but their viscosity index contribution is low.
• An object of the present invention is therefore to provide a lubricant composition, especially for transmission and gear, having a compromise between viscosity index and shear stability.
• Another object of the present invention is also to provide such a composition which has a stability of the viscosity as a function of temperature, that is to say a good viscosity index.
• Yet another object of the present invention is to provide such a composition for a fuel saving Eco.
• PAG polyalkylene glycol
• PAG polyalkylene glycol
• a kinematic viscosity measured at 100 ° C. according to the ASTM D445 (2015) standard, greater or equal to 50 mm 2 / s
• a kinematic viscosity measured at 40 ° C according to ASTM D445 (2015), greater than or equal to 500 mm 2 / s, more particularly greater than or equal to 1 000 mm 2 / s
• Viscosity Index measured according to ASTM D2270 (2012), greater than or equal to 160, preferably greater than or equal to 180, even more preferably greater than or equal to 200.
• the present invention relates to a lubricant composition
• a lubricant composition comprising:
• PAG polyalkylene glycol
• PAG polyalkylene glycol
• butylene oxide units comprising at least 50% by weight of butylene oxide units, and preferably comprising only butylene, having a kinematic viscosity, measured at 100 ° C according to ASTM D445 (2015), greater than or equal to 50 mm 2 / s, a kinematic viscosity, measured at 40 ° C according to ASTM D445 (2015), superior or 1000 mm 2 / s, and a Viscosity Index, measured according to ASTM D2270 (2012), greater than or equal to 180.
• PAG polyalkylene glycol
• the PAG of the invention comprises at least 80% by weight of butylene oxide units and propylene oxide units. Even more preferably, the PAG of the invention is a PAG whose alkylene units are only butylene oxide units.
• the PAG of the invention is therefore described as a PAG whose alkylene oxide units are chosen from butylene oxide and propylene oxide units with at least 50% by weight, preferably at least 80% by weight, and even more preferred 100% by weight of butylene oxide units.
• the PAG of the invention comprises 100% by weight of butylene oxide units.
• the PAG of the invention is soluble in the base oil, and advantageously whatever the temperature.
• the PAG is obtained by polymerization or copolymerization of butylene oxides.
• the PAG of the invention may be prepared according to the known methods described especially in US20120108482 and in particular by reaction of one or more alcohols comprising from 2 to 12 carbon atoms, in particular polyol, preferably diol, with butylene oxide and propylene oxide.
• the alcohols are especially diols and preferably 1,2-propanediol.
• the butylene oxide may be selected from 1,2-butylene oxide or 2,3-butylene oxide, preferably 1,2-butylene oxide.
• the method described in US20120108482 is adapted to the single implementation of butylene oxide.
• the PAG is obtained by reaction of one or more polyols comprising from 2 to 12 carbon atoms, preferably diol, with butylene oxides.
• the PAG of the invention comprises from 25 to 300 moles of butylene oxide units, preferably from 50 to 200 moles.
• the PAG of the invention comprises a ratio O / C (oxygen atom / carbon atom) by weight of between 0.29 and 0.38, preferably between 0.29 and 0.35.
• the PAG of the invention has a molar mass of between 5,000 and 200,000 g / mol.
• the PAG of the invention has a kinematic viscosity, measured at 100 ° C. according to ASTM D445 (2015), of between 50 and 500 mm 2 / s, a kinematic viscosity, measured at 40 ° C. according to the standard ASTM D445 (2015), between 500 and 4000 mm 2 / s and a Viscosity Index, measured according to ASTM D2270 (2012), between 160 and 300.
• the PAG of the invention in particular comprising 100% by weight of butylene oxide units, has a kinematic viscosity, measured at 40 ° C. according to ASTM D445 (2015), of between 1000 and 4500 mm 2. / s, preferably between 1000 and 4250 mm 2 / s, and preferably between 1100 and 4250 mm 2 / s.
• the PAG of the invention in particular comprising 100% by weight of butylene oxide units, has a Viscosity Index, measured according to ASTM D2270 (2012), of between 180 and 300, preferably between 200 and 300.
• the PAG has a kinematic viscosity measured at 100 ° C. according to ASTM D445 (2015) of between 50 and 500 mm 2 / s, a kinematic viscosity measured at 40 ° C. according to ASTM D445 ( 2015) between 1000 and 4500 mm 2 / s and a viscosity index measured according to ASTM D2270 (2012) between 180 and 300.
• the lubricating composition of the invention comprises at most 30% by weight of PAG, preferably from 2% to 30% by weight of PAG, more preferably from 2% to 15% relative to the total weight of the PAG.
• the lubricating composition of the invention comprises at most 30% by weight of PAG, preferably from 6% to 30% by weight of PAG, more preferably from 9% to 16% relative to the total weight of the PAG. lubricating composition.
• the lubricant composition used according to the invention comprises at least one base oil.
• the lubricant composition used according to the invention can include any type of mineral lubricating base oil, synthetic or natural, animal or vegetable, known to those skilled in the art.
• the base oils used in the lubricant compositions according to the invention may be oils of mineral or synthetic origins belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) (Table A) or their mixtures.
• the mineral base oils according to the invention include all types of base oils obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, desalphating, solvent dewaxing, hydrotreatment, hydrocracking , hydroisomerization and hydrofinition.
• Mixtures of synthetic and mineral oils can also be used.
• lubricating bases for producing the lubricating compositions used according to the invention, except that they must have properties, in particular viscosity, oxidation resistance, adapted for use for engines or for vehicle transmissions.
• the base oils of the lubricant compositions used according to the invention can also be chosen from synthetic oils, such as certain carboxylic acid esters and alcohols, and from polyalphaolefins (PAOs).
• the polyalphaolefins used as base oils are, for example, obtained from monomers comprising from 4 to 32 carbon atoms, for example from octene or of decene, and whose viscosity at 100 ° C is between 1, 5 and 15 mm 2 .s "1 according to the ASTM D445 (2015) standard Their average molecular mass is generally between 250 and 3000 according to the ASTM standard D5296.
• the base oils of the present invention are chosen from the above base oils whose aromatic content is between 0 and 45%, preferably between 0 and 30%.
• the aromatic content of the oils is measured according to UV Burdett method.
• the lubricant composition used according to the invention comprises at least 50% by weight of base oils relative to the total mass of the composition.
• the lubricant composition used according to the invention comprises at least 60% by weight, or even at least 70% by weight, of base oils relative to the total mass of the composition.
• the lubricant composition used according to the invention comprises from 60 to 99.5% by weight of base oils, preferably from 70 to 99.5% by weight of base oils, relative to the total mass of the composition, preferably from 70 to 98%.
• the preferred additives for the lubricant composition used according to the invention are chosen from friction modifiers, detergents, anti-wear additives, extreme pressure additives, viscosity index improvers, dispersants, antioxidants, pour point improvers, defoamers, thickeners and mixtures thereof.
• the lubricant composition used according to the invention comprises at least one antiwear additive, at least one extreme pressure additive or their mixtures.
• Anti-wear additives and extreme pressure additives protect friction surfaces by forming a protective film adsorbed on these surfaces.
• anti-wear additives are chosen from phosphosulfur additives such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically zinc dialkyldithiophosphates or ZnDTPs.
• the preferred compounds have the formula Zn ((SP (S) (OR 2 ) (OR 3 )) 2 , in which R 2 and R 3 , which may be identical or different, independently represent an alkyl group, preferably an alkyl group containing from 1 to 18 carbon atoms
• Amine phosphates are also anti-wear additives that can be used in the composition lubricant according to the invention.
• the phosphorus provided by these additives can act as a poison of the catalytic systems of automobiles because these additives are ash generators.
• non-phosphorus additives such as, for example, polysulfides, especially sulfur-containing olefins.
• the lubricant composition according to the invention may comprise from 0.01 to 6% by weight, preferably from 0.05 to 4% by weight, more preferably from 0.1 to 2% by weight relative to the mass. total lubricating composition, anti-wear additives and extreme pressure additives.
• the lubricant composition according to the invention may comprise at least one friction-modifying additive.
• the friction modifying additive may be chosen from a compound providing metal elements and an ash-free compound.
• the compounds providing metal elements mention may be made of transition metal complexes such as Mo, Sb, Sn, Fe, Cu and Zn, the ligands of which may be hydrocarbon compounds comprising oxygen, nitrogen, sulfur or phosphorus.
• the ashless friction modifier additives are generally of organic origin and may be selected from monoesters of fatty acids and polyols, alkoxylated amines, alkoxylated fatty amines, fatty epoxides, borate fatty epoxides; fatty amines or fatty acid glycerol esters.
• the fatty compounds comprise at least one hydrocarbon group comprising from 10 to 24 carbon atoms.
• the lubricant composition according to 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 0.1 at 2% by weight relative to the total mass of the lubricant composition, friction modifier additive.
• the lubricant composition according to the invention may comprise at least one antioxidant additive.
• the antioxidant additive generally serves to retard the degradation of the lubricating composition in service. This degradation can notably result in the formation of deposits, the presence of sludge or an increase in the viscosity of the lubricant composition.
• Antioxidant additives act in particular as radical inhibitors or destroyers of hydroperoxides.
• antioxidant additives commonly used, mention may be made of antioxidant additives of phenolic type, antioxidant additives of amine type, antioxidant phosphosulfur additives.
• Some of these antioxidant additives, for example phosphosulfur antioxidant additives can be ash generators. Phenolic antioxidant additives may be ash-free or may be in the form of neutral or basic metal salts.
• the antioxidant additives may especially be chosen from sterically hindered phenols, sterically hindered phenol esters and sterically hindered phenols comprising a thioether bridge, diphenylamines, diphenylamines substituted with at least one C 1 -C 12 alkyl group, ⁇ , ⁇ '-dialkyl-aryl diamines and mixtures thereof.
• the sterically hindered phenols are chosen from compounds comprising a phenol group in which at least one vicinal carbon of the carbon bearing the alcohol function is substituted with at least one alkyl group containing 10 carbon atoms, preferably an alkyl group containing CrC 6 , preferably a C 4 alkyl group, preferably by the ter-butyl group.
• Amino compounds are another class of antioxidant additives that can be used, optionally in combination with phenolic antioxidant additives.
• amine compounds are the aromatic amines, for example the aromatic amines of formula NR 4 R 5 R 6 in which R 4 represents an optionally substituted aliphatic or aromatic group, R 5 represents an optionally substituted aromatic group R 6 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R 7 S (0) z R 8 wherein R 7 represents an alkylene group or alkenylene group, R 8 represents an alkyl group, alkenyl group or an aryl group and z represents 0, 1 or 2. Sulfurized alkyl phenols or their alkali and alkaline earth metal salts may also be used as antioxidant additives.
• R 4 represents an optionally substituted aliphatic or aromatic group
• R 5 represents an optionally substituted aromatic group
• R 6 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R 7 S (0) z R 8 wherein R 7 represents an alkylene group or alkenylene group, R 8 represents an al
• antioxidant additives is copper compounds, for example copper thio- or dithio-phosphates, copper and carboxylic acid salts, dithiocarbamates, sulphonates, phenates, copper acetylacetonates. Copper salts I and II, succinic acid or anhydride salts can also be used.
• the lubricant composition according to the invention may contain all types of antioxidant additives known to those skilled in the art.
• the lubricating composition comprises at least one ash-free antioxidant additive.
• the lubricating composition according to the invention comprises from 0.5 to 2% by weight relative to the total weight of the composition, of at least one antioxidant additive.
• the lubricant composition according to the invention may also comprise at least one detergent additive.
• the detergent additives generally make it possible to reduce the formation of deposits on the surface of the metal parts by dissolving the secondary oxidation and combustion products.
• the detergent additives that can be used in the lubricant composition according to the invention are generally known to those skilled in the art.
• the detergent additives can be anionic compounds comprising a long lipophilic hydrocarbon chain and a hydrophilic head.
• the associated cation may be a metal cation of an alkali metal or alkaline earth metal.
• the detergent additives are preferably chosen from the alkali metal or alkaline earth metal salts of carboxylic acids, the sulphonates, the salicylates, the naphthenates and the phenate salts.
• the alkali and alkaline earth metals are preferably calcium, magnesium, sodium or barium. These metal salts generally comprise the metal in stoichiometric amount or in excess, therefore in an amount greater than the stoichiometric amount. It is then overbased detergent additives; the excess metal bringing the overbased character to the detergent additive is then generally in the form of an oil insoluble metal salt, for example a carbonate, a hydroxide, an oxalate, an acetate, a glutamate, preferably a carbonate .
• the lubricant composition according to the invention may comprise from 0.5 to 4% by weight of detergent additive relative to the total mass of the lubricant composition.
• the lubricant composition according to the invention may also comprise at least one 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 lubricant composition according to the invention.
• pour point depressant additives mention may be made of alkyl polymethacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes and alkylated polystyrenes.
• the lubricant composition according to the invention may also comprise at least one dispersing agent.
• the dispersing agent may be chosen from Mannich bases, succinimides and their derivatives.
• the lubricating composition according to the invention may comprise from 0.2 to 10% by weight of dispersing agent relative to the total mass of the lubricating composition.
• the lubricating composition of the present invention may also comprise at least one viscosity index improving additive.
• additives improving the viscosity number include polymeric esters, homopolymers or copolymers, hydrogenated or non-hydrogenated, styrene, butadiene and isoprene, polyacrylates, polymethacrylates (PMA) or alternatively olefin copolymers, in particular ethylene / propylene copolymers.
• the lubricating composition according to the invention can be in various forms.
• the lubricant composition according to the invention may in particular be an anhydrous composition.
• this lubricating composition is not an emulsion.
• the base oil of the composition according to the invention is chosen from group II oils and group III oils as defined above.
• the base oil of the composition according to the invention comprises at least one polyalphaolefin (PAO) as described above, in particular an alkene oligomer whose final viscosity is between 2 and 500 cSt.
• PAO polyalphaolefin
• the base oil of the composition according to the invention is chosen from group II oils and group III oils as defined above and at least one polyalphaolefin (PAO) as described above.
• PAO polyalphaolefin
• the lubricant composition according to the invention has excellent shear stability.
• the shear stability can in particular be determined from the kinematic viscosities before and after a shearing process according to the KRL 20h test according to the CEC-L-45-A-99 (2014) standard.
• the shear loss is less than 5%.
• the lubricant composition according to the invention has low traction coefficients.
• the traction coefficient is determined by machine MTM (Mini Traction Machine) sold by PCS instrument. The operating conditions observed are a temperature of 40 ° C under a load of 75N and a disk speed of 1 m / s for a SRR (slip / rolling ratio or sliding-rolling ratio in English) of 20%.
• the lubricant composition according to the invention has a temperature-stable viscosity.
• the lubricant composition according to the invention allows a gain in fuel Eco.
• the lubricant composition according to the invention retains satisfactory anti-wear properties.
• the lubricant composition according to the invention allows a performance gain on the cold properties.
• the lubricating composition of the invention is particularly useful for the lubrication of the transmission components of motor vehicles, especially transmission for light or heavy vehicles, for example gearboxes, bridges, preferred manual gearbox and heavy truck bridges; or for gears, especially industrial gears.
• the present invention relates to the use of a lubricant composition according to the invention for the lubrication of the transmission members of motor vehicles, in particular transmission for light or heavy vehicles, for example gearboxes, bridges, preferably gearboxes. manual and heavy truck bridges; or for gears, especially industrial gears.
• lubricants for transmission members of any type of grade 70W and 75W are suitable.
• the present invention also relates to a method of lubricating at least one mechanical part of a transmission member of motor vehicles, especially transmission for light or heavy vehicle, for example gearboxes, bridges, preferably manual gearbox and bridges. heavyweight ; or gearing, in particular industrial gearing, said method comprising at least one step in which said mechanical part is brought into contact with at least one lubricating composition according to the invention.
• the lubricant composition according to the present invention can also be used for engine lubrication, especially motor vehicle engine and preferably for grades SAE OW-8, 0W-12 and 0W-16.
• the invention also relates to the use of the lubricant composition according to the invention for reducing the traction coefficient of a vehicle engine oil.
• the invention also relates to the use of the lubricant composition according to the invention for reducing the fuel consumption of a vehicle equipped with a bridge or a gearbox lubricated with this composition.
• the invention also relates to the use of the lubricant composition according to the invention for reducing the fuel consumption of a vehicle equipped with a transmission lubricated with this composition.
• the invention also relates to the use of the lubricant composition according to the invention for reducing the traction coefficient of a transmission oil, in particular a gearbox oil or a deck oil.
• the present application also relates to the use of at least one PAG as defined above in a lubricant composition, in particular for transmission members of motor vehicles or gears, in particular industrial gears, for increasing the viscosity index of the composition. lubricant while providing a stability of the lubricating composition in shear.
• the lubricating compositions were formulated with PAG of the invention so as to have a kinematic viscosity at 100 ° C of about 7.5 mm 2 / s, these compositions are described in Table 2 below.
• compositions CL2 and CL3 were formulated to have a kinematic viscosity at 100 ° C of about 7.5 mm 2 / sec, these compositions are described in Table 3 below.
• the base oil and additives are identical to those of compositions CL2 and CL3.
• thermo-oxidative stability measured by DKA according to CEC standard L-48-A-00 (2014)
• compositions according to the invention have a good brookfield viscosity, improved with respect to the CC1 reference.
• the shear stability is excellent. It can be seen that the solution of the invention, although more viscous, shears less than Viscobase 11-522® during this test, despite the fact that the PAGs tested are more viscous than the Viscobase 1 1 -522®.
• the traction coefficient (TOC) was measured using the PCS instrument MTM tribometer. The measurement conditions were 75N load and the disk speed was 1 m / s at an evaluated temperature (40 ° C) and a SRR of 20%. The results are shown in Table 6 below.
• the lubricant compositions according to the invention CL4 and CL5 make it possible to lower the traction coefficient, the reproducibility of the test being of the order of 3%.
• composition CL6 and the comparative composition CC4 below were used for this evaluation.
• the friction modifier is a conventional organomolybdenum compound commercially available from the company Adeka under the trade name "Sakuralube®”.
• the conventional additive package 1 comprises dispersant, detergents and anti-wear.
• test procedure is as follows:
• the test is carried out using a Hyundai L13-B engine, whose power is 81 kW at 5,500 rpm, driven by an electric generator to impose a rotation speed of between 650 and 5,000 revolutions / min while a torque sensor can measure the friction torque generated by the movement of the parts in the engine.
• the friction torque induced by the test lubricant is compared for each regime and each temperature at the torque induced by the reference lubricating composition (SAE 0W8), here CC4.
• the speed ranges, the variation of the speed as well as the temperature were chosen to cover, in the most representative way possible, the points of the NEDC certified cycle.
• the instructions implemented are:
• compositions according to the invention make it possible to increase the Fuel Eco in contrast to the compositions comprising no PAG according to the invention.

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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)

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• 2016
  • 2016-10-24 FR FR1660274A patent/FR3057878B1/fr active Active
• 2017
  • 2017-10-23 MX MX2019004714A patent/MX2019004714A/es unknown
  • 2017-10-23 JP JP2019521476A patent/JP2019532157A/ja active Pending
  • 2017-10-23 CN CN201780065684.5A patent/CN109863234A/zh active Pending
  • 2017-10-23 WO PCT/EP2017/076958 patent/WO2018077780A1/fr active Application Filing
  • 2017-10-23 US US16/344,276 patent/US11499115B2/en active Active
  • 2017-10-23 KR KR1020197011908A patent/KR102506181B1/ko active IP Right Grant
  • 2017-10-23 EP EP17787408.8A patent/EP3529341B1/de active Active
  • 2017-10-23 BR BR112019007674A patent/BR112019007674A2/pt not_active Application Discontinuation

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