EP3587542B1 - Additif pour huile lubrifiante et son procédé de production - Google Patents

Additif pour huile lubrifiante et son procédé de production Download PDF

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Publication number
EP3587542B1
EP3587542B1 EP18758457.8A EP18758457A EP3587542B1 EP 3587542 B1 EP3587542 B1 EP 3587542B1 EP 18758457 A EP18758457 A EP 18758457A EP 3587542 B1 EP3587542 B1 EP 3587542B1
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EP
European Patent Office
Prior art keywords
lubricant additive
type
oxidant
lubricant
content
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.)
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EP18758457.8A
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German (de)
English (en)
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EP3587542C0 (fr
EP3587542A4 (fr
EP3587542A1 (fr
Inventor
Tomoyuki Sonoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sonoda Co Ltd
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Sonoda Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular 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
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • 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
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/16—Amides; Imides
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
    • C10M133/56—Amides; Imides
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
    • C10M135/10—Sulfonic acids or derivatives thereof
    • C—CHEMISTRY; METALLURGY
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    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
    • C10M135/36—Heterocyclic sulfur, selenium or tellurium compounds the ring containing sulfur and carbon with nitrogen or oxygen
    • C—CHEMISTRY; METALLURGY
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    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04—Phosphate esters
    • C10M137/10—Thio derivatives
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    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/08—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing aliphatic monomer having more than 4 carbon atoms
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/084—Inorganic acids or salts thereof containing sulfur, selenium or tellurium
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C—CHEMISTRY; METALLURGY
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    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
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    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
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    • 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
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    • C10M2207/283—Esters of polyhydroxy compounds
    • C10M2207/2835—Esters of polyhydroxy compounds used as base material
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    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/223—Five-membered rings containing nitrogen and carbon only
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    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28—Amides; Imides
    • C—CHEMISTRY; METALLURGY
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    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid salts
    • C—CHEMISTRY; METALLURGY
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    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/106—Thiadiazoles
    • C—CHEMISTRY; METALLURGY
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    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/045—Metal containing thio derivatives
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    • 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
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    • 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
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    • 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
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/54—Fuel economy
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/76—Reduction of noise, shudder, or vibrations
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/02—Bearings
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    • 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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    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
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    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/045—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for continuous variable transmission [CVT]
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
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    • C10N2070/00—Specific manufacturing methods for lubricant compositions
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    • C10N2070/00—Specific manufacturing methods for lubricant compositions
    • C10N2070/02—Concentrating of additives

Definitions

  • This invention relates to a lubricant additive and a process for manufacturing the lubricant additive.
  • lubricant additives are classified to several groups including anti-friction agents, friction modifiers, detergent-dispersants, viscosity index improvers, extreme pressure agents, antioxidants and so on.
  • lubricant additives those which are suitable to an intended use of a lubricating oil are chosen from several types of additives in accordance with the aptitude to such intended use and are blended to a lubricating oil. With regard to such lubricating additives, various inventions have been accomplished to date (e. g. Patent Documents 1 and 2).
  • a lubricant additive provided with a lubricating part having a high molecular weight and being soluble to the base oil of the lubricant product and a pair of adsorptive parts having functional moieties adsorptive to the part of the material of the unit to be applied and being bonded to the lubricating part such that the lubricating part is pinched between the absorptive parts is disclosed.
  • the said pair of adsorptive parts is adsorbed to the part of the material of the applied unit and the lubricating part having a high molecular weight and being soluble to the base oil, which is pinched between the adsorptive parts, also remains in the part of the materials. In this way, the lubricating part remained and the adsorptive parts adsorbed in the material function to improve the property of the base oil, thus providing the base oil with excellent friction-lowering performance.
  • a lubricant composition with the kinetic viscosity at 100°C being equal to or less than 6.00 mm 2 /s which is prepared by blending at least a base oil that contains dialkylmonoether (A), the kinetic viscosity of which at 100°C is in a range of from 0.50 to 2.50 mm 2 /s, and poly- ⁇ -olefin (B), the kinetic viscosity of which at 100°C is equal to or higher than 50mm 2 /s, is disclosed.
  • A dialkylmonoether
  • B poly- ⁇ -olefin
  • US 6,107,259 A relates to oil soluble calcite overbased detergents and engine oils containing same.
  • the overbased detergent is a calcium sulfonate and provides improved anti-wear properties. Moreover, a method of making such overbased detergents is described.
  • the lubricant additive is generally prepared by selecting proper additives that suit to the intended application of the lubricating oil from various types of additives and blending the selected additives to the lubricating oil. Therefore, the composition of a lubricant additive for engine use will be different from that of a lubricant additive for gear use, and the lubricant additive for engine use is not always suitable as the lubricant additive for gear use. As a consequence, it has been a problem for the user of a vehicle who needs to arrange different types of lubricant products in order to use a suitable lubricant to the respective units of a vehicle.
  • this invention was accomplished for aiming at solving the above-mentioned problem, and it is an object of this invention to provide such a lubricant additive that is applicable for blending integrally with any different types of lubricating oils respectively used for different specific applications and a process for manufacturing such lubricant additive.
  • the invention teaches a lubricant additive according to claim 1.
  • the process for manufacturing the lubricant additive according to this invention is configured as a method for manufacturing the lubricant additive adapted to be blended to a lubricating oil and is characterized by comprising the first step to mix a synthetic base oil of the polyolester type and poly-alpha-olefin oligomer in a routine container under temperature of from 50 to 90°C, the second step to add an antioxidant of the zinc dithiophosphate type, succinimide, an extreme pressure agent of the thiadiazole type and an antioxidant of the phenol type to the mixture obtained in the first step to dissolve them in said mixture, and the third step to mix calcium sulfonate containing calcium carbonate formed in the calcite crystal structure to the mixture obtained in the second step.
  • Fig. 1 is a flowchart showing an example of the process for manufacturing the lubricant additive according to this invention.
  • the lubricant additive prepared according to the embodiment of this invention comprises the following components A to G.
  • the component A to be used for the lubricant additive according to this embodiment is a synthetic base oil of the polyolester type, which is one of base oils of the ester type and is characterized by its property of low fluidity, high viscosity index, high flash point, and excellent thermal stability and oxidation stability.
  • said synthetic base oil of the polyolester type is trimethylolpropane tricaprylate/tricaprate, which is a fatty acid ester being a single substance resulted from bonding of two different kinds of fatty acids.
  • the content of the component A in the lubricant additive is in a range of from 35.0 w/w% to 60.0 w/w%.
  • the component A is not confined to the above-described trimethylolpropane tricaprylate/tricaprate.
  • the component A may also be a synthesized base oil prepared by mixing decanoic acid, mixed esters with hexanoic acid, octanoic acid and trimethylolpropane with the other fatty acid, e.g.
  • composition A may also be a base oil of the diester type having excellent oxidation stability at high temperature, though it has low
  • the component B to be used for the lubricant additive according to the embodiment of this invention is a poly-alpha-olefin (PAO) oligomer obtained by polymerizing known alpha olefins, and a poly-alpha-olefin oligomer having a high viscosity index (high viscosity index PAO) in particular is used in this embodiment.
  • PAO poly-alpha-olefin
  • PAO poly-alpha-olefin
  • alpha-olefins comprising 2 to 20 carbon atoms, such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-peptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene and 1-icocene, and each of these alpha-olefins are used alone or in combination.
  • the poly-alpha-olefin oligomer has a homogeneous molecular structure that contains neither a double bond nor sulfur while it has a composition similar to mineral oils and has characteristics of good thermal stability at high temperature, good shear stability, low pour point (good fluidity at low temperatures), high viscosity index and high flash point.
  • the component B is preferably a poly-alpha-olefin oligomer formed in a three-dimensional structure, which is manufactured with use of metallocene catalyst, and this poly-alpha-olefin oligomer is resistant to decrease in the viscosity in comparison with a poly-alpha-olefin oligomer formed in a linear structure manufactured with use of the other catalyst.
  • the content of the component B in the lubricant additive is in a range of from 10.0 w/w% to 50.0 w/w%, more preferably in a range of from 10.0 w/w% to 30.0 w/w%.
  • component B is not confined to the above-described poly-alpha-olefin oligomer formed in a three-dimensional structure, and it can be blended with the other viscosity index improvers, e.g. polyalkylmethacrylate, ethylene-propylene copolymer and styrene-butadiene copolymer.
  • the other viscosity index improvers e.g. polyalkylmethacrylate, ethylene-propylene copolymer and styrene-butadiene copolymer.
  • the component C to be used for the lubricant additive according to the embodiment of this invention is an anti-oxidant of the zinc dithiophosphate type comprising zinc dithiophosphate as the main component, which has characteristic of exerting its performance in comparatively low temperature region.
  • the component C is particularly an anti-oxidant, the main component of which is zinc dithiophosphate comprising primary alkyl groups.
  • the zinc dithiophosphate comprising primary alkyl groups is especially superior in wear resistance performance compared to zinc dithiophosphate comprising either secondary alkyl groups or tertiary alkyl groups.
  • the component C is preferably zinc 2-ethylhexyldithiophosphate.
  • the content of the component C in the lubricant additive is in a range of from 0.5 w/w% to 3.0 w/w%, and more preferably in a range of from 1.0 w/w% to 2.0 w/w%.
  • the component C is not confined to zinc 2-ethylhexyldithiophosphate.
  • the other anti-oxidants e.g. zinc dialkyl dithiophosphate (ZnDTP), such as zinc dipropyl dithiophosphate, zinc dibutyl dithiophosphate, zinc dipentyl dithiophosphate, zinc diheptyl dithiophosphate, zinc dioctyl dithiophosphate, zinc didecyl dithiophosphate and zinc didodecyl dithiophosphate, may be used either alone or in combination as the component C.
  • ZnDTP zinc dialkyl dithiophosphate
  • a synthesized base oil of the diester type is blended as the component A in particular, it is preferable to mix it with zinc dipropyl dithiophosphate, dibutyl dithiophosphate or dioctyl dithiophosphate either alone or in combination.
  • the component D to be used for the lubricant additive according to the embodiment of this invention is a dispersing agent consisting of either alkenyl succinimide or alkyl succinimide, which functions to disperse sludge and soot generated under low temperature into the lubricating oil.
  • alkenyl succinimide and alkyl succinimide has performance of improving solubility and increasing performance sustainability of the respective additives mixed.
  • poly-isobutenyl succinimide the nitrogen content of which is in a range of from 1.0 w/w% to 2.0 w/w%, is used as the component D.
  • the content of the component D in the lubricant additive is in a range of from 3.0 w/w% to 10.0 w/w%, and more preferably in a range of from 4.0 w/w% to 6.0 w/w%.
  • component D is not confined to poly-isobutenyl succinimide. Any of the other alkenyl succinimide or alkyl succinimide may be used either alone or in combination as the component D.
  • the component E to be used for the lubricant additive according to the embodiment of this invention is an extreme pressure agent of the thiadiazole type, which is classified as thiadiazole-(benzobis) derivative and is also characterized as an wear prevention agent that exerts wear resistance performance of reducing friction and wear caused in between the respective surfaces of contacting metals and of preventing metals from being burned.
  • the thiadiazole derivative to be used in this embodiment is a dimercaptothiadiazole derivative, and is specifically 2,5-dimercapto-1,3,4-thiadiazole, 4,5-dimercaptothiadiazole, 3,5-dimercapto-1,2,4-thiadiazole and 3,4-dimercapto-1,2,5-thiadiazole, those which are respectively used either alone or in combination.
  • the content of the component E in the lubricant additive is in a range of from 1.0 w/w% to 6.0 w/w%, and more preferably in a range of from 2.0 w/w% to 4.0 w/w%.
  • the component E is not confined to dimercaptothiadiazole derivative.
  • the other extreme pressure agent e.g. triazole derivatives may be used as the substitute.
  • a sulfur-based extreme pressure agent such as sulfurized fatty acid ester containing a sulfur atom
  • the content of the sulfurized fatty acid ester in the lubricant additive is set to a range of from 1.0 w/w% to 9.0 w/w%, and more preferably to a range of from 4.0 w/w% to 8.0 w/w%.
  • the component F to be used for the lubricant additive according to the embodiment of this invention is an anti-oxidant of the phenol type, which is blended for aiming at preventing oxidation and sludge formation from occurring, and is specifically 2,6-di-tert-butyl-4-methylphenol being widely used as the anti-oxidant of the phenol type.
  • the content of the component F in the lubricant additive is in a range of from 0.1 w/w% to 2.0 w/w%, and more preferably in a range of from 0.1 w/w% to 1.5 w/w%.
  • component F is not confined to 2,6-di-tert-butyl-4-methylphenol, and it may be replaced with any of the other anti-oxidants of the phenol type including e.g. 2,6-di-tert-butyl-4-ethylphenol, 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol) and the like.
  • the component G to be used for the lubricant additive according to the embodiment of this invention is a detergent consisting of overbased calcium sulfonate, which is commonly used for lubricants for industrial use and contains calcium carbonate and calcium hydroxide.
  • calcium sulfonate containing a lot of calcium carbonate formed in the calcite crystal structure is used as the component G.
  • calcium sulfonate used in this embodiment is the one that contains calcium carbonate formed in the calcite crystal structure, the content of metal calcium contained therein is in a range of from 2.0 w/w% to 12.0 w/w%, and TBN (Total Basic Number) thereof is in a range of from 15 to 500.
  • the calcium sulfonate containing a substantial amount of calcium carbonate formed in the calcite crystal structure has better lubricating performance than commonly-used calcium sulfonate containing calcium carbonate formed in the aragonite crystal structure.
  • the content of the component G in the lubricant additive is in a range of from 5 w/w% to 30 w/w%, and more preferably in a range of from 10 w/w% to 20 w/w%.
  • Fig. 1 is a flowchart showing an example of the process for manufacturing the lubricant additive according to an embodiment of this invention.
  • the lubricant additive according to this embodiment is manufactured via the steps S1 to S3 (step 1 to step 3) as shown in Fig. 1 .
  • Step S1 the first step
  • the components A and B are mixed in a routine container under heating at a temperature ranging from approximately 50°C or higher to approximately 90°C or lower
  • Step S2 the second step
  • the component C, the component D, the component E and the component F are added to the mixture of the components A and B obtained in the step S1 in the order written and are dissolved into the mixture of the components A and B in the routine container mentioned above (Step S2).
  • Step S3 the third step
  • the component G is further added to said mixture obtained in the step 2 (Step S3).
  • the lubricant additive according to this embodiment is manufactured via the first step (S1) through the third step (S3) as described above.
  • the lubricant additives P1 through P4 are manufactured by blending the components A to G at the respective blending ratios specified in the respective columns of P1 to P4 presented in Table 1 shown below.
  • the lubricant additive Sa as the example for reference is manufactured by blending the components A to G at the blending ratio specified in the column of Sa in Table 1, provided the ratio for the component G is fixed to 0 w/w%.
  • Lubricant additive P4 is not according to the invention, [Table 1] P1 P2 P3 P4 Sa Component A (w/w%) 57.0 52.0 42.0 32.0 62.0 Component B (w/w%) 28.0 28.0 28.0 28.0 Component C (w/w%) 1.5 1.5 1.5 1.5 1.5 1.5 Component D (w/w%) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Component E (w/w%) 3.0 3.0 3.0 3.0 3.0 Component F (w/w%) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Component G (w/w%) 5.0 10.0 20.0 30.0 0.0 0.0
  • ATF Automatic Transmission Fluid
  • CVTF Continuous Variable Transmission Fluid
  • Diesel engine oil Diesel engine oil
  • Suspension oil is presented in Table 2 through Table 5, respectively.
  • Test Parameters Unit Commercially available ATF alone Additive of Other Source Sa P1 P2 P3 P4 Kinematic Viscosity at 40°C mm 2 /s 35.42 35.4 37.06 37.5 38.09 38.88 39.66 Kinematic Viscosity at 100°C mm 2 /s 7.185 7.17 7.444 7.51 7.605 7.727 7.846 Viscosity Index 172 171 173 173 173 175 173 Four-ball Wear mm 0.51 0.41 0.36 0.32 0.29 0.29 0.34 [Table 3] Test Parameters Unit Commercially available CVTF alone Additive of Other Source Sa P1 P2 P3 P4 Kinematic Viscosity at 40°C mm 2 /s 28.85 36 32.2 32.62 32.79 33.55 34.46 Kinematic Viscosity at 100°C mm 2 /s 7.181 8.251 7.492 7.56 7.636 7.755 7.902 Viscosity Index 229 215 212 212
  • Table 2 presents a comparison with regard to the measurements of the four test parameters obtained from a commercially available vehicle ATF alone and the same vehicle ATF blended with each of a conventional vehicle oil made by the other manufacturer, the lubricant additive Sa for the reference, and the respective lubricant additives P1 to P3 according to the embodiment of this invention, each in an amount equivalent to 7% of the total amount of the vehicle ATF.
  • the test condition for the four-ball load capacity test presented in Table 2 namely number of rotations, load, duration and temperature, are 1,200 rpm, 294N (30 kg), 60 min. and 75°C, respectively.
  • Table 3 presents a comparison with regard to the measurements of the four test parameters obtained from a commercially available vehicle CVTF alone and the same vehicle CVTF blended with each of a conventional vehicle oil made by the other manufacturer, the lubricant additive Sa for the reference, and the respective lubricant additives P1 to P3 according to the embodiment of this invention, each in an amount equivalent to 7% of the total amount of the vehicle CVTF.
  • the test condition for the four-ball load capacity test presented in Table 3, namely number of rotations, load, duration and temperature, are 1,200 rpm, 294N (30 kg), 60 min. and 75°C, respectively.
  • Table 4 represents a comparison with regard to the measurements of the four test parameters obtained from a commercially available diesel engine oil alone and the same diesel engine oil blended with each of a conventional vehicle oil made by the other manufacturer, the lubricant additive Sa for the reference, and the respective lubricant additives P1 to P3 according to the embodiment of this invention, each in an amount equivalent to 10% of the total amount of the diesel engine oil.
  • the test condition for the four-ball load capacity test presented in Table 4 namely number of rotations, load, duration and temperature, are 1,200 rpm, 392N (40 kg), 60 min. and 75°C, respectively.
  • Table 5 presents a comparison with regard to the measurements of the four test parameters obtained from a commercially available vehicle suspension oil alone and the same vehicle suspension oil blended with each of the lubricant additive Sa for the reference and the respective lubricant additives P1 to P3 according to the embodiment, each in an amount equivalent to 10% of the total amount of the diesel engine oil.
  • the test condition for the four-ball load capacity test presented in Table 5, namely number of rotations, load, duration and temperature, are 1,200 rpm, 392N (40 kg), 60 min. and 75°C, respectively.
  • This performance of wear reduction can be particularly enhanced when the content of the component G, namely calcium sulfonate containing calcium carbonate made in the calcite crystal structure, in the lubricant additive is set to a range of from 5.0 w/w% to 30.0 w/w%. This is because that, when the content of the component G is greater than 5.0 w/w%, the wear scar diameter as a result of the four-ball wear test becomes remarkably smaller, meaning that the wear resistance has been clearly improved, comparing to the case of no blending of the component G.
  • the wear scar diameter as a result of the four-ball wear test in case of the component G content being 10 w/w% is shorter than that of the component G content being 5.0 w/w%
  • the wear scar diameter in case of the component G content being 20 w/w% is equal to or shorter than that in case of the component G content being 10 w/w%.
  • the wear scar diameter becomes equal to or longer than the wear scar diameter in case of the component G content being 20 w/w%.
  • the content of the component G in the lubricant additive when the lubricant additives according to this embodiment P1 to P3 are blended to each of plural types of lubricating oils for different applications, is thought to be preferably in a range of from 10.0 w/w% to 20.0 w/w%.
  • Comparative example 2 that compares the measurements of the four test parameters obtained from a commercially-available gear oil for industrial machinery use alone and the same gear oil blended with each of the lubricant additive Sa for the reference and the respective lubricant additives P1 to P3 according to the embodiment of this invention is shown in Table 6.
  • this effect of wear reduction can be particularly enhanced when the content of the component G, namely calcium sulfonate containing calcium carbonate formed in the calcite crystal structure, in the lubricant additive is set to a range of from 5.0 w/w% to 30.0 w/w%.
  • Comparative example 4 that compares the performance of No. 2 base oil and the same No. 2 base oil blended with the lubricant additive P2 according to the embodiment of this invention is presented in Table 8. [Table 8] No. 2 Base Oil P2 La/Lo 2.53 36.7 La/Lo (Base Oil) 1.0 14.50 Power reduction rate (%) 0.0 8.0 Number of Samples 5 1
  • Table 8 a comparison in the performance of a commercially available No. 2 base oil and the same No. 2 base oil blended with the lubricant additive P2 according to the embodiment of this invention in an amount equivalent to 10% of the total amount of the No. 2 base oil is shown.
  • the ratio of the measured value of the operating time La (unit: h) until bearing failure against theoretical life time of bearing Lo (unit: h) after subjected to the thrust ball bearing life time test, to which the Weibull distribution is applied the calculated value of La (actual measured value)/ La (measured value using No. 2 base oil only), and the power reduction rate obtained by dividing the required power with use of the additive-blended base oil by the required power with use of the base oil only are presented in Table 8.
  • the test conditions (size of thrust ball bearing, number of rotations and load) for the bearing life time test in connection with Table 8 are #51104, 750 rpm and 4.4 kN, respectively.
  • the lubricant additive by itself is applicable integrally to both lubricants for vehicle use and lubricants for industrial machinery use (except metalworking oils).
  • the lubricant additive of this invention such a problem that several different types of lubricant additives are separately required for lubricating the plural different units of a vehicle, when the user desires to apply lubricating oil to those various units, can be solved, which leading to contribution to energy saving and resource saving that the modern society is seeking and improvement of global environment.

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Claims (15)

  1. Additif lubrifiant adapté pour être mélangé à une huile lubrifiante, caractérisé en ce que l'additif lubrifiant comprend :
    du sulfonate de calcium contenant du carbonate de calcium formé dans la structure de cristal de calcite,
    un anti-oxydant du type dithiophosphate de zinc, un succinimide,
    caractérisé en outre en ce que
    l'additif lubrifiant comprend une huile de base synthétisée du type polyolester, un oligomère de poly-alpha-oléfine, un agent de pression extrême du type thiadiazole et un anti-oxydant du type phénol, la teneur de l'huile de base synthétisée du type polyolester à contenir dans l'additif lubrifiant étant située dans une plage de 35,0 % p/p à 60,0 % p/p et la teneur du sulfonate de calcium à contenir dans l'additif lubrifiant étant située dans une plage de 5,0 % p/p à 30,0 % p/p.
  2. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'huile de base synthétisée du type polyolester comprend des acides gras saturés normaux comprenant 8 à 18 atomes de carbone.
  3. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'huile de base synthétisée du type polyolester comprend du tricaprylate/tricaprate de triméthylolpropane.
  4. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'oligomère de poly-alpha-oléfine a une structure tri-dimensionnelle qui est fabriquée avec l'utilisation d'un catalyseur métallocène.
  5. Additif lubrifiant selon la revendication 1 caractérisé en ce que la teneur de l'oligomère de poly-alpha-oléfine à contenir dans l'additif lubrifiant se situe dans une plage de 10,0 % p/p à 50,0 % p/p.
  6. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'anti-oxydant du type dithiophosphate de zinc comprend un anti-oxydant, le principal composant duquel est le dithophosphate de zinc comprenant des groupes alkyle primaires.
  7. Additif lubrifiant selon la revendication 6 caractérisé en ce que le dithiophosphate de zinc comprend du 2-éthylhexyldithiophosphate de zinc.
  8. Additif lubrifiant selon la revendication 1 caractérisé en ce que la teneur de l'anti-oxydant du type dithiophosphate de zinc à contenir dans l'additif lubrifiant se situe dans une plage de 0,5 % p/p à 3,0 % p/p.
  9. Additif lubrifiant selon la revendication 1 caractérisé en ce que le succinimide comprend du polyisobuténylsucinimide.
  10. Additif lubrifiant selon la revendication 1 caractérisé en ce que la teneur du succinimide à contenir dans l'additif lubrifiant se situe dans une plage de 3,0 % p/p à 10,0 % p/p.
  11. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'agent de pression extrême du type thiadiazole comprend au moins un choisi dans le groupe constitué par le 2,5-dimercapto-1,3,4-thiadiazole, le 4,5-dimercaptothiadiazole, le 3,5-dimercapto-1,2,4-thiadiazole et le 3,4-dimercapto-1,2,5-thiadiazole.
  12. Additif lubrifiant selon la revendication 1 caractérisé en ce que la teneur de l'agent de pression extrême du type thiadiazole à contenir dans l'additif lubrifiant se situe dans une plage de 1,0 % p/p à 6,0 % p/p.
  13. Additif lubrifiant selon la revendication 1 caractérisé en ce que l'anti-oxydant du type phénol comprend du 2,6-di-tert-butyl-4-méthylphénol.
  14. Additif lubrifiant selon la revendication 1 caractérisé en ce que la teneur de l'anti-oxydant du type phénol à contenir dans l'additif lubrifiant se situe dans une plage de 0,1 % p/p à 2,0 % p/p.
  15. Procédé de fabrication de l'additif lubrifiant selon l'une des revendications 1 à 14 adapté pour être mélangé à une huile lubrifiante caractérisé comme comprenant :
    la première étape de mélange de l'huile de base synthétisée du type polyolester et l'oligomère de poly-alpha-oléfine dans un récipient de routine sous chauffage à une température située dans la plage allant de 50 °C ou plus à 90 °C ou moins,
    la deuxième étape de mélange de l'anti-oxydant du type dithiophosphate, le succinimide,
    l'agent de pression extrême du type thiadiazole et l'anti-oxydant du type phénol avec le mélange obtenu dans la première étape pour dissoudre ces composants mélangés dans le mélange obtenu dans la première étape
    et
    la troisième étape de mélange du sulfonate de calcium contenant le carbonate de calcium formé dans la structure de cristal de calcite au mélange obtenu dans la deuxième étape.
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US20200002639A1 (en) 2020-01-02
KR20190117525A (ko) 2019-10-16
SG11201907681QA (en) 2019-09-27
WO2018155601A1 (fr) 2018-08-30
EP3587542C0 (fr) 2023-08-23
EP3587542A4 (fr) 2020-12-09
JP6465536B2 (ja) 2019-02-06
EP3587542A1 (fr) 2020-01-01
AU2018224752B2 (en) 2023-06-01

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