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
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
• • 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
  • C10M141/10—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 phosphorus-containing 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/026—Butene
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
  • C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
  • C10M2209/084—Acrylate; Methacrylate
• • 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
  • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
  • C10M2219/022—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of hydrocarbons, e.g. olefines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/045—Metal containing thio derivatives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
• • 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
  • 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 invention relates to lubricating compositions for transmissions in the field of motor vehicles, more particularly adapted to the lubrication of bridges, having the property of increasing the fatigue resistance of the bridge gears.
• a typical cause of damage to bridge gears is fatigue damage, which occurs under repeated forces. This phenomenon is induced by repeated rolling constraints under heavy loads.
• the phenomenon of flaking is particularly noticeable on heavy goods vehicles, where the gears are subjected to very heavy loads and very long durations of use.
• the prevention of this phenomenon involves a reduction of contact stresses thanks to an appropriate geometry of the parts, and the reduction of friction, avoiding adhesion.
• Lubricant is involved in this prevention process, due to its viscosity and the physicochemical reactivity of its additives.
• Sulfur additives as well as phosphorus and phospho-sulfur additives, are widely used in bridges and gearbox oil formulations as anti-wear and extreme pressure additives. They protect the friction parts under heavy load by forming a film adsorbed on their surface.
• Sulfurized additives forming a tribo iron sulphide film of low shear strength, easily peelable, make it possible in particular to avoid galling, a phenomenon which occurs at the first stages of use, when the resistance of the interface exceeds that of the underlying material.
• the additives present in the lubricant can also have an impact, positive or negative, on the propagation of cracks inside the parts and thus on the phenomenon of chipping. There is therefore a need to increase the service life of friction parts, in particular bridge gears, by limiting the appearance of the peeling phenomenon.
• the present invention provides a method for improving the spall protection properties of transmission lubricating compositions containing sulfur and phosphosulfur compounds comprising a step of adding, in the lubricating composition for initial transmission, compounds ( c) reducing by at least 5% the mass content of active sulfur measured by ASTM D 1662 in the final composition.
• the ratio between the final sulfur content by weight Sfinal in the final composition, after implementation of the process, and the initial Sinitial sulfur mass content in the initial composition, before implementation. of the process, the mass content measured according to ASTM D2622, Sfinal / Sinitial is greater than or equal to 1.05.
• the added compound (c) is a sulfur additive in which:
• the ratio between the active sulfur content by mass at 150 ° C., measured according to the ASTM D 1662 standard, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, is less than 0.45 and,
• the sulfur element mass content measured according to the ASTM D5185 standard, is greater than 20%, preferably greater than 40%.
• the additive (c) is chosen from one or more sulfur-containing olefins corresponding to the general formula R 1 -S x -R 2, where R 1 and R 2 are alkyl groups comprising from 3 to 15 carbon atoms. carbon, preferably from 1 to 5 carbon atoms, preferably 3 carbon atoms, and x is an integer between 2 and 6, preferably equal to 3.
• the final lubricating composition comprises:
• the ratio between the sulfur element mass content, measured according to ASTM D2622, and the phosphorus element mass content, measured according to the ASTM D5185, of said lubricating composition is between 20 and 40, preferably between 25 and 35;
• the ratio between the active sulfur content by mass at 150 ° C., measured according to ASTM standard Dl 662, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, of said lubricating composition is less than 0.34, preferentially less than 0.33.
• the invention relates to a lubricant composition
• a lubricant composition comprising:
• the ratio between the sulfur element mass content, measured according to the ASTM D2622 standard, and the phosphorus element mass content, measured according to the ASTM D5185, S / P standard, of said lubricating composition is preferably between 20 and 40; between 25 and 35;
• the ratio between the active sulfur content by mass at 150 ° C., measured according to ASTM standard Dl 662, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, of said lubricating composition is less than 0.34, preferentially less than 0.33.
• the mass content of active sulfur at 150 ° C, Sactif, measured according to ASTM D 1662 is less than or equal to 1,200%, preferably less than or equal to 1,180%.
• the lubricant composition according to the invention contains from 0.1 to 2% by weight of at least one sulfur additive (c) in which:
• the ratio between the active sulfur content by mass at 150 ° C., measured according to the ASTM Dl 662 standard, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, is less than 0.45 and,
• the sulfur element mass content measured according to the ASTM D5185 standard, is greater than 20%, preferably greater than 40%.
• the additive (c) is chosen from one or more sulfur-containing olefins corresponding to the general formula R 1 -S x -R 2, where R 1 and R 2 are alkyl groups comprising from 3 to 15 carbon atoms, preferably 1 to 5 carbon atoms, preferably 3 carbon atoms, and x is an integer between 2 and 6, preferably equal to 3.
• the lubricating composition according to the invention comprises, as base oil (a), from 10 to 20% of one or more Group V base oils, optionally in combination with one or more selected from groups I, II, III, IV or VI of the API classification, and / or base oils of natural origin.
• the 60 to 90% of base oil (a) consist of:
• the phosphorus or phospho sulfur-containing additive (s) anti-wear and extreme pressure (b) are chosen from alkyl phosphates, alkyl phosphonates, thiophosphoric acid and thiophosphorous acid. esters of these acids, their salts, alkyl dithiophosphates.
• the composition according to the invention has a Brookfield dynamic viscosity of less than or equal to 150 mPa at temperatures greater than or equal to -12 ° C., preferably greater than or equal to -26 ° C., preferably greater than or equal to -40 ° C. ° C.
• the composition according to the invention has a kinematic viscosity at 100 0 C is less than or equal to 32.5 Cst.
• the composition according to the invention belongs to the class of multigrade oils of grade 85W1 40, 85W90, 80W90, or 75W90 or monograde oils of grade 140 or 90 according to the standard SAEJ306.
• the invention also relates to the use of a lubricant composition according to the invention as a lubricant for vehicle transmissions, preferably as a lubricant for the gears of vehicle decks.
• a lubricant composition according to the invention is used as a lubricant for increasing the peeling resistance of friction metal parts, preferably the vehicle gears.
• the invention also relates to the use of sulfur olefins alone or as a mixture for reducing by at least 5% the mass content of active sulfur measured by the ASTM standard Dl 662 of a lubricating composition for transmission, said sulfurized olefins being represented by the general formula R 1 -S x -R 2, where R 1 and R 2 are alkyl groups containing from 3 to 15 carbon atoms, preferably from 1 to 5 carbon atoms, preferably 3 carbon atoms, and x is a integer between 2 and 6, preferably equal to 3 and in which the ratio between the active sulfur content by mass at 150 ° C., measured according to the ASTM D 1662 standard, and the sulfur element mass content, measured according to the ASTM D5185 standard. , Sactif / S, is less than 0.45 and the sulfur element mass content,
• one or more of said sulfur olefins represent from 0.1 to 2% by weight of the final transmission lubricant composition.
• the present invention also relates to lubricating compositions for increasing the service life of friction parts, including bridge gears, by limiting the occurrence of peeling phenomenon.
• the mass% of active sulfur is measured by the ASTMl 662 standard.
• these improved properties of resistance to chipping can be obtained for example by the introduction of some type of sulfurized olefins dialkylsulphide, in a brine oil formula containing conventional phospho sulfur and / or phosphorus compounds, and optionally conventional sulfur additives.
• the base oils according to the invention may be of mineral, synthetic or natural origin.
• the mineral base oils according to the invention include all types of bases obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, desalphating, solvent dewaxing, hydrotreatment, hydrocracking and hydroisomerization, hydrofinishing, ...
• the preferred mineral base oils are Group I oils according to the API classification, obtained by solvent extraction and solvent dewaxing of an atmospheric residue, deasphalted oil, etc.
• the lubricant compositions according to the present invention advantageously comprise from 20 to 30% by weight of a paraffinic base oil of high viscosity of group I according to the API classification, with a viscosity of between 30 and 34 Cst at 100 ° C. and from 30 to 45% by weight of a Group I paraffinic base oil having a viscosity of between 10 and 15 Cst at 100 ° C.
• the synthetic base oils according to the present invention are oils belonging to groups IV, V and VI of API classification, including polyalphaolefins, polyinternal olefins, alkyl aromatics, alkyl benzene, alkylnaphthalenes, esters, diesters, esters polyols such as pentaerythritol esters, oligomers of aplhaolefins and esters, polyalkylenes glycols.
• the lubricating compositions according to the present invention advantageously comprise from 10 to 20% by weight of a Group V synthetic base oil, in particular ester-type bases, in optional combination with one or more base oils chosen from groups I, II, III, IV or VI of the API classification, and / or base oils of natural origin.
• the preferred Group V synthetic base oils are the diesters such as ditridecyl glutarate, di 2 ethyl hexyl adipate, di isodecyl adipate, ditridecyl adipate, di 2 ethyl hexyl cebacate.
• lubricant compositions according to the present invention may advantageously comprise:
• a paraffinic base oil of high viscosity belonging to the group I of API classification, a viscosity of between 30 and 34 cSt at 100 0 C (25, 5% BSS) 30 to 45% by weight, relative to the total weight of lubricant, of a Group I paraffinic base oil with a viscosity of between 10 and 15 Cst at 100 ° C. (40.35% 600NS)
• a Group V synthetic oil for example an ester base oil.
• the phospho-sulfur antiwear and extreme pressure additives used in the present invention are, for example and not exclusively, thiophosphoric acid, thiophosphorous acid, esters of these acids, their salts, and dithiophosphates, particularly zinc dithiophosphates.
• Examples which may be mentioned as examples of phospho-sulfur-containing anti-wear and extreme pressure additives are those containing from 1 to 3 sulfur atoms, such as monobutylthiophosphate, monooctylthiophosphate, monolaurylthiophosphate, dibutylthiophosphate, dilaurylthiophosphate, tributylthiophosphate, trioctylthiophosphate, triphenylthiophosphate, trilaurylthiophosphate, monobutylthiophosphite, monooctylthiophosphite, monolaurylthiophosphite, dibutylthiophosphite, dilaurylthiophosphite, tributylthiophosphite, trioctylthiophosphite, triphenylthiophosphite, trilaurylthiophosphite and their salts.
• salts of thiophosphoric acid esters and thiophosphorous acid are those obtained by reaction with a nitrogen compound such as ammonia or an amine or zinc oxide or zinc chloride.
• the lubricant compositions according to the present invention may also contain phosphorus anti-wear and extreme-pressure additives, such as, for example, alkyl phosphates or alkyl phosphonates, phosphoric acid, phopsphorous acid, mono, di and tri esters of phosphorous acid and phosphoric acid and their salts
• phosphorus anti-wear and extreme-pressure additives such as, for example, alkyl phosphates or alkyl phosphonates, phosphoric acid, phopsphorous acid, mono, di and tri esters of phosphorous acid and phosphoric acid and their salts
• sulfur anti-wear and extreme pressure additives examples include dithiocarbamates, thiadiazoles and benzothiazoles, sulfur-containing olefins.
• SIBs The most common sulfur-containing olefins are still referred to as SIBs for "Sulfurized IsoButylenes".
• sulfur-containing olefins are generally obtained by a reaction for the sulfurization of olefins with sulfur, hydrogen sulphide or hydrated alkali metal sulphides, for example sodium sulphide.
• An example of processes for the preparation of such sulfurized olefins is described, for example, in US Pat. Nos. 4,34,454 and 5,135,570.
• a very wide range of olefins can be so sulphured.
• sulphurized olefins are manufactured from isobutylene, diisobutylene, triisobutylene, tripropylene, or tetrapropylene.
• the SIBs thus produced are mixtures of compounds of poorly defined structure, including, among other impurities, trithiones, dithiolethiones and halogens, and a high content of active sulfur.
• the sulfur-containing olefins used in the compositions according to the present invention are dialkyl sulfides represented by the formula R1-S1-R2, or R1 and R2 are alkyl groups having a carbon number of between 3 and 15, and where x is an integer between 2 and 6.
• the average size of the alkyl groups R 1 and R 2 can be obtained by NMR analysis. It can also be directly deduced from the nature of the olefins used as starting material.
• the alkyl compounds of the dialkyl sulfides according to the invention comprise from 3 to 15 carbon atoms, preferentially from 3 to 12 carbon atoms.
• the short-chain compounds will advantageously be chosen (average number of carbon atoms of between 3 and 5, preferably of 4).
• the sulfur-containing olefins according to the invention preferably have a high content of sulfur element (greater than 20%, preferably greater than 40%) and are compounds in which the ratio between the active sulfur content by mass at 150 ° C., measured according to US Pat. ASTM D 1662, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, is less than 0.45.
• the sulfurized olefins used in the invention are obtained from isobutylene, sulfur and hydrogen sulphide, by catalytic processes using solid catalysts such as those described in patents EP 1 149813, US6544963, or by processes as described in FR 2 607 496 and FR 2 630 104, consisting of reacting a mercaptan and sulfur in the presence of a basic catalyst.
• sulfur-containing olefins mentioned above may also be advantageously used in combination with conventional SIBS as described above.
• the sulfur content of the base oil or of the base oil mixture, as well as the respective amounts of phospho sulfur, phosphorus and sulfur-containing extreme pressure additives, in particular sulfur-containing olefins, are generally chosen so that said compositions have a ratio between their sulfur element content, measured by the ASTM D4294 standard and their phosphorus element content, measured by the ASTM D5185 standard, ie S / P, or between 10 and 60.
• the lubricant compositions according to the present invention have a S / P ratio preferably between 20 and 40, preferably between 25 and 35.
• the present invention also relates to the use of the specific sulfur-containing olefins described above for the preparation of lubricating compositions improving the resistance to chipping of friction parts.
• These compounds are also used in the process according to the invention for improving the protective properties against peeling of lubricating compositions containing sulfur and phosphosulfur additives.
• compounds such as unsaturated natural fatty substances for example oleic acid, linoleic acid
• stearic acid or natural oils containing these unsaturated natural fats alone or in a mixture such as for example rapeseed oil, sunflower, palm, coconut, coconut, linseed oil or castor oil ... or olefins such as isobutylene, hexene, nonene, decene, dodecene, tetradecene, styrene, etc.
• These compounds can be used alone or as a mixture, optionally in combination with the specific sulfur-containing olefins described above, in the processes according to the invention for improving the protective properties against flaking of compositions for transmissions containing sulfur and phospho-sulfur compounds.
• the nature and the quantity of these additives is chosen so that the final composition, after implementation of the process, has the following characteristics:
• a ratio between the sulfur element mass content, measured according to the ASTM D2622 standard, and the phosphorus element mass content, measured according to the ASTM D5185, S / P standard, of said lubricating composition is between 20 and 40, preferably between 25 and 35, and
• a ratio between the active sulfur content by mass at 150 ° C., measured according to the ASTM D 1662 standard, and the sulfur element mass content, measured according to ASTM D5185, Sactif / S, of said lubricating composition, is less than 0.33.
• the lubricant compositions according to the present invention may also contain any type of additive adapted to their use.
• the total weight% of phosphosulfur, phosphorus and sulfur-containing additives is between 10 and 30%.
• compositions according to the invention may contain one or more thickening additives whose role is to increase the viscosity of the composition, hot or cold, or viscosity index (VI) improving additives.
• thickening additives whose role is to increase the viscosity of the composition, hot or cold, or viscosity index (VI) improving additives.
• additives are most often low molecular weight polymers of the order of 2,000 to 50,000 daltons (Mn).
• compositions according to the invention will preferably be present in an amount of 1 to 10% by weight in the compositions according to the invention.
• PIBs of the order of 2000 daltons
• polyacrylate or polyoxyacrylates of the order of 30,000 daltons
• olefin copolymers olefin and alpha olefin copolymers
• EPDM polybutenes.
• High molecular weight poly-alphaolefins viscosity 100 ° C.> 150
• styrene-olefin copolymers hydrogenated or not, etc.
• compositions according to the invention may contain one or more additives of a step-down additive pour point.
• additives may typically be present at from 0.1 to 2% by weight. It may be, for example, poly-Acrylates, Ethyl-Vinyl Acetates, ethylenic copolymers, condensation derivatives of naphthalene,
• Anti-corrosion agents and copper passivating agents for example such as polyisobutene succinic anhydrides, sulfonates thiadiazoles, mercaptobenzothiazole.
• oils according to the invention may also contain all types of additives suitable for their use, and in particular:
• Detergents such as, for example, sulphonates, phenates, calcium salycilates, sodium, magnesium, barium, etc.
• Dispersants such as the derivatives of PoIy Iso butylene succinic anhydride, ...
• Antioxidants which may be for example Amino antioxidants (Ocatadiphenylamines, Phenyl-Alpha-Naphtyl Amines, ...), Phenolics (BHT and derivatives), Sulfurized (Phentaes Sulfurized), etc.
• the viscosity of the oils according to the invention can be defined by their grade according to the standard SAE J306.
• the viscosity values corresponding to the different grades are reported in Table 1 below.
• kinematic viscosity values at 100 ° C are measured according to the standard:
• oils according to the invention preferentially have grades characteristic of bridge oil formulations for light or heavy vehicles. They are preferably grade 75W-90, 80W-90, 85W-90, 85Wl 40, or monograde oils 90 or 140. Examples:
• the reference lubricant composition (A) is an 80W90 grade oil. This reference as well as compositions B, C, and D were prepared from a mixture of several base oils and additives.
• the phosphosulfur additives are provided by a package of performance additive for transmission oils, providing all the basic properties (anti-wear, extreme-pressure, anti-oxidant, anti-corrosion, etc.), and in particular containing alkyl dithiophosphates, alkyl phosphonates, alkyl phosphates.
• the mass compositions and the main characteristics of the oils A, B, C and D are given in table 3.
• the mass content of phosphorus (ASTMD5185), sulfur (ASTM D2622), and active sulfur at 150 ° C (ASTM D 1662) was measured for reference A and oils B, C and D.

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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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  • 2007-12-21 FR FR0709017A patent/FR2925520B1/fr not_active Expired - Fee Related
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  • 2008-12-18 WO PCT/FR2008/001778 patent/WO2009103897A2/fr not_active Ceased
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  • 2008-12-18 US US12/808,527 patent/US9133414B2/en not_active Expired - Fee Related
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