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
  • C10M169/06—Mixtures of thickeners 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
  • 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
  • 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
  • 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
  • C10M2205/0285—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 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/283—Esters of polyhydroxy compounds
  • C10M2207/2835—Esters of polyhydroxy compounds 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/284—Esters of aromatic monocarboxylic acids
  • C10M2207/2845—Esters of aromatic monocarboxylic 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/285—Esters of aromatic polycarboxylic acids
  • C10M2207/2855—Esters of aromatic polycarboxylic 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/10—Amides of carbonic or haloformic acids
  • C10M2215/102—Ureas; Semicarbazides; Allophanates
  • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/223—Five-membered rings containing nitrogen and carbon 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
  • 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
• • 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
  • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
  • C10M2219/066—Thiocarbamic type compounds
  • C10M2219/068—Thiocarbamate metal salts
• • 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
  • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
  • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
  • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
• • 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
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/04—Groups 2 or 12
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/12—Groups 6 or 16
• • 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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/02—Bearings
• • 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
• • 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
  • C10N2040/38—Conveyors or chain belts
• • 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
  • C10N2070/00—Specific manufacturing methods for lubricant compositions

Definitions

• the present invention relates to a lubricating oil composition for high-temperature applications.
• sliding portions such as a chain, a gear and a bearing inside a tenter used for manufacturing an optical film, a food-packaging film, a solar panel film or the like. Since a lubricating oil used in such sliding portions is exposed to high temperatures, an amount of evaporation of the lubricating oil significantly affects a life time of a device. In other words, under high temperatures, since the lubricating oil loses an inherent viscosity to form a thin film, it is necessary to restrain the amount of evaporation of the lubricating oil in order to keep lubricity thereof.
• a lubricating oil composition that contains a polyol ester synthetic oil and a diphenylamine derivative having a C 12 -C 72 fatty acid and/or an aryl alkyl group having a number average molecular weight of 400 to 800 (see Patent Literature 1).
• Patent Literature 1 JP-A-2005-314650
• the lubricating oil does not always exhibit sufficient characteristics under high temperatures.
• the lubricating oil composition may turn sludge under high temperatures to cause an oil path to be clogged.
• a lubricating oil unsuitable to the resin may cause troubles such as a poor lubricity or breakage of the sliding portion, which is caused by oil film breakage, or an increase in scattering of the lubricating oil to the surroundings, which is caused by an increase in the amount of the lubricating oil to be used.
• An object of the invention is to provide a lubricating oil composition for high-temperature applications, in which, under high temperatures and in a thin film, an amount of evaporation of the lubricating oil composition is restrained, fluidity thereof is kept for a long time, and lubricity thereof in a contact portion between a resin and a metal is excellent.
• the invention provides a lubricating oil composition for high-temperature applications as follows:
• a lubricating oil composition for high-temperature applications in which, under high temperatures and in a thin film, an amount of evaporation of the lubricating oil composition is restrained, fluidity thereof is kept for a long time, and lubricity thereof in a contact portion between a resin and a metal is excellent, can be provided.
• a lubricating oil composition for high-temperature applications is provided by blending a component (A) that is an aromatic ester and a component (B) that is a poly-alpha-olefin having a viscosity index of 140 or more.
• component (A) that is an aromatic ester
• component (B) that is a poly-alpha-olefin having a viscosity index of 140 or more.
• the component (A) of the lubricating oil composition for high-temperature applications in the exemplary embodiment (hereinafter, referred to as "the composition") is the aromatic ester and corresponds to a base oil of the composition.
• Examples of the aromatic ester as the component (A) are preferably a pyromellitate ester and a trimellitate ester.
• the pyromellitate ester is particularly preferable.
• a pyromellitate tetraester represented by a formula (1) below is preferably used as the pyromellitate ester.
• all functional groups of R 1 to R 4 are hydrocarbyl groups, which may be mutually the same or different.
• Each of the hydrocarbyl groups are preferably an alkyl group having 6 to 16 carbon atoms, more preferably 6 to 10 carbon atoms, in terms of evaporativity restraint and fluidity.
• Examples of the pyromellitate tetraester represented by the formula (1) include tetra-n-octyl pyromellitate, tetra-3,5,5-trimethylhexyl pyromellitate, tetra-undecyl pyromellitate, and tetraisostearyl pyromellitate.
• the alkyl group preferably has a linear structure in terms of evaporativity restraint.
• a blending rate of the component (A) in the composition is preferably in a range from 10 mass% to 95 mass% of a total amount of the composition, more preferably in a range from 30 mass% to 80 mass%. When the blending rate falls within the above range, the composition is excellent in a balance between evaporativity restraint and fluidity.
• the blending rate is particularly preferably 80 mass% or less of the total amount of the composition.
• the component (B) of the composition is a poly-alpha-olefin (hereinafter, also referred as PAO) having a viscosity index of 140 or more.
• PAO poly-alpha-olefin
• the viscosity index is preferably 145 or more, more preferably 150 or more. Note that the viscosity index can be measured in accordance with JIS K 2283.
• PAO (the component (B)) having a viscosity index of 140 or more is preferably exemplified by PAO manufactured using a metallocene catalyst.
• PAO is a polymer (oligomer) of an alpha-olefin.
• an alpha-olefin oligomer can be used as it is, or can be used after hydrogenation.
• the alpha-olefin in a form of a monomer preferably has 6 to 20 carbon atoms in terms of the viscosity index and evaporativity. For instance, 1-octene, 1-decene, 1-dodecene and 1-tetradecene are usable as the alpha-olefin.
• the alpha-olefin more preferably has 8 to 16 carbon atoms, further preferably 10 to 14 carbon atoms.
• PAO is preferably a dimer, trimer, tetramer and pentamer of the alpha-olefin in terms of a low evaporativity and energy-saving.
• the number of carbon atoms, the blending rate and a polymerization degree of the alpha-olefin are adjustable depending on desired characteristics.
• a polymerization catalyst of the alpha-olefin a metallocene catalyst is used in terms of a low evaporativity and energy-saving.
• a typical nickel catalyst such as sponge nickel and nickel diatomite and a noble metal catalyst such as palladium activated carbon or ruthenium activated carbon are preferable.
• a kinematic viscosity at 100 degrees C of the component (B) in the composition is preferably in a range from 10 mm 2 /s to 400 mm 2 /s.
• a blending rate of the component (B) in the composition is preferably in a range from 5 mass% to 50 mass% of the total amount of the composition, more preferably in a range from 10 mass% to 40 mass%.
• the blending rate falls within this range, since an oil film breakage on a contact portion between a resin and a metal is restrained while an evaporation amount is restrained, a breakage surface pressure of the composition can be improved.
• composition is preferably further blended with a thickener as a component (C).
• thickener examples include polybutene, highly viscous PAO having a kinematic viscosity at 100 degrees C of 100 mm 2 /s or more, dipentaerythritol ester, tripentaerythritol ester, tetrapentaerythritol ester, ester (polyester) of pentaerythritol partial ester or pentaerythritol and fatty acid, complex ester (obtained by reacting a linear saturated aliphatic carboxylic acid, a linear aliphatic dicarboxylic acid and polyhydric alcohol), polymethacrylate, polyoxyalkylene, and aromatic polyester (polyester of phthalic acid, trimellitic acid and pyromellitic acid).
• polybutene is preferable since the composition blended with polybutene can be effectively prevented from dropping off a chain and a gear even under high temperatures.
• Polybutene is exemplified by a mixture of polyisobutylene and poly-n-butene formed by polymerization of olefins having 4 carbon atoms, preferably having a mass average molecular weight (Mw) of 1000 to 3000. Polybutene or polyisobutylene having a mass average molecular weight (Mw) of 1300 to 2500 is particularly preferable. A polymer formed by 100mass% polyisobutylene or 100 mass% poly-n-butene may be used as polybutene.
• a kinematic viscosity at 100 degrees C of the component (C) in the composition is preferably 100 mm 2 /s or more.
• a blending rate of the component (C) in the composition is preferably 50 mass% or less of the total amount of the composition, more preferably 30 mass% or less.
• the blending rate is particularly preferably 50 mass% or less of the total amount of the composition.
• the composition is preferably further blended with a sulfur-containing triazine antioxidant as a component (D).
• the component (D) exhibits a low evaporativity, and also exhibits excellent anti-oxidation effect and sludge formation prevention effect even under high temperatures by being contained together with a later-described component (E).
• the sulfur-containing triazine antioxidant is preferably exemplified by 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazine-2-ylamino)phenol.
• a blending rate of the component (D) in the composition is preferably in a range from 0.01 mass% to 5 mass% of the total amount of the composition, more preferably in a range from 0.1 mass% to 3 mass%, in terms of the above effects.
• the composition is preferably further blended with a thiophosphoric acid ester antioxidant as the component (E).
• the component (E) exhibits a low evaporativity, and also exhibits excellent anti-oxidation effect and wear resistance even under high temperatures by being contained together with the aforementioned component (D).
• the thiophosphoric acid ester include a thiophosphite and a thiophosphate, particularly preferably, an alkyl thiophosphite and an aryl thiophosphate, examples of which include trilauryl trithiophosphite, triphenyl thiophosphate, trinonylphenyl thiophosphate and triphenyl phosphorothioate.
• a blending rate of the component (E) in the composition is preferably in a range from 0.01 mass% to 10 mass% of the total amount of the composition, more preferably in a range from 0.5 mass% to 5 mass%, in terms of the above effects.
• the composition is preferably further blended with an amine antioxidant as the component (F).
• an amine antioxidant is exemplified by a diphenylamine antioxidant, examples of which include diphenylamine, monooctyl diphenylamine, monononyl diphenylamine, 4,4'-dibutyl diphenylamine, 4,4'-dihexyl diphenylamine, 4,4'-dioctyl diphenylamine, 4,4'-dinonyl diphenylamine, tetrabutyl diphenylamine, tetrahexyl diphenylamine, tetraoctyl diphenylamine, tetranonyl diphenylamine, and 4,4'-bis( ⁇ , ⁇ -dimethylbenzyl)diphenylamine.
• the amine antioxidant is also exemplified by a naphthylamine antioxidant, examples of which include ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, butylphenyl- ⁇ -naphthylamine, hexylphenyl- ⁇ -naphthylamine, octylphenyl- ⁇ -naphthylamine, and nonylphenyl- ⁇ -naphthylamine.
• the diphenylamine antioxidant is preferred to the naphthylamine antioxidant in terms of the effects.
• a blending rate of the component (F) in the composition is preferably in a range from 0.01 mass% to 10 mass% of the total amount of the composition, more preferably in a range from 0.1 mass% to 5 mass%, in terms of the above effects.
• composition may further contain various additives such as a detergent dispersant, a metal deactivator, an antifoaming agent and a friction modifier (hereinafter, referred to as FM agent) as long as the effects of the invention are not impaired.
• additives such as a detergent dispersant, a metal deactivator, an antifoaming agent and a friction modifier (hereinafter, referred to as FM agent) as long as the effects of the invention are not impaired.
• the detergent dispersant is classified into a metal detergent and an ashless dispersant.
• the ashless dispersant include polybutenyl succinimide, polybutenyl benzylamine, and polybutenyl amine, each of which has a polybutenyl group having a number average molecular weight of 900 to 3,500, and a derivative of a boron-modified substance and the like of those.
• One of the ashless dispersants may be contained alone or two or more thereof may be contained in combination.
• a content of the ashless dispersant(s) is preferably in a range from 0.01 mass% to 10 mass% of the total amount of the composition.
• the metal detergent examples include a sulfonate, a phenate, a salicylate and a naphthenate of an alkali metal (e.g., sodium (Na) and potassium (K)) or an alkaline earth metal (e.g., calcium (Ca) and magnesium (Mg)).
• an alkali metal e.g., sodium (Na) and potassium (K)
• an alkaline earth metal e.g., calcium (Ca) and magnesium (Mg)
• One of the metal detergents may be used alone, or two or more thereof may be used in combination.
• a total base number and a content of the metal detergent(s) may be selected as needed depending on required performance of the lubricating oil.
• the total base number is 500 mgKOH/g or less according to a perchloric acid method, desirably in a range from 10 mgKOH/g to 400 mgKOH/g.
• a content of the metal detergent(s) is preferably in a range
• metal deactivator examples include benzotriazole, a triazole derivative, a benzotriazole derivative and a thiadiazole derivative.
• a content of the metal deactivator is preferably in a range from 0.01 mass% to 3 mass% or more of the total amount of the composition.
• a liquid silicone is suitable, and a methylsilicone, a fluorosilicone, a polyacrylate and the like are usable.
• a content of the antifoaming agent is preferably in a range from 0.0005 mass% to 0.1 mass% of the total amount of the composition.
• the FM agent includes: sulfur-containing FM agents such as zinc dithiophosphate (ZnDTP), zinc dithiocarbamate (ZnDTC), disulfides, sulfurized olefins, sulfurized fats and oils, sulfurized esters, thiocarbonates, and thiocarbamates; phosphorus-containing FM agents such as phosphite esters, phosphate esters, phosphonate esters and amine salts or metal salts thereof; and sulfur and phosphorus-containing FM agents such as thiophosphite esters, thiophosphate esters, thiophosphonate esters, sulfurized oxymolybdenum organophosphorodithioate (MoDTP), sulfurized oxymolybdenum dithiocarbamate (MoDTC) and amine salts or metal salts thereof.
• sulfur-containing FM agents such as zinc dithiophosphate (ZnDTP), zinc dithiocarbamate (ZnDTC), disulfides, sulfurized
• the amount of evaporation can significantly be reduced and formation of sludge can be restrained, under high temperatures and in a thin film. Further, the lubricating oil composition for high-temperature applications in the exemplary embodiment exhibits an excellent lubricity on the contact portion between the resin such as engineering plastics (e.g., polyether ketone) and the metal in use under the atmosphere of a temperature of 150 degrees C or more.
• the resin such as engineering plastics (e.g., polyether ketone) and the metal in use under the atmosphere of a temperature of 150 degrees C or more.
• the lubricating oil composition is suitably applicable to a chain, a chain roller, a chain conveyor, a bearing and the like used in a high-temperature furnace, a drying furnace, panelboard manufacturing equipment, a chemical fiber tenter, a resin film tenter and the like.
• Blending compositions are shown in Table 1.
• a container and a thermostat air bath for the thermal stability test of lubricating oils (JIS K 2540) were used.
• a sample oil (1 g) was put in the container and was left to stand still for 20 hours or 40 hours at 230 degrees C. Subsequently, an evaporation amount of the sample oil was measured. The evaporation amount was divided by the original amount of the sample oil, and the obtained value was represented in percentage to provide an evaporation rate (mass%). Note that air was arranged to flow into the thermostat air bath at a flow rate of 10 L/hr during heating.
• the friction test for the sample oils was conducted using a pin-on-disk wear tester (in accordance with JIS K7128) under the following conditions.
• Pin material 5.0-mm diameter, 8.0-mm height, polyether ketone (PEK) (manufactured by Victrex PLC)
• Disc material 60.0-mm diameter, 5.0-mm thickness, CrMo steel,
• a kinematic viscosity at 40 degrees C of each of the lubricating oil compositions was measured by a method in accordance with JIS K2283.

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• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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• 2014
  • 2014-03-12 JP JP2015505505A patent/JPWO2014142157A1/ja active Pending
  • 2014-03-12 CN CN201480014235.4A patent/CN105008500A/zh active Pending
  • 2014-03-12 WO PCT/JP2014/056451 patent/WO2014142157A1/fr active Application Filing
  • 2014-03-12 US US14/763,046 patent/US20150353862A1/en not_active Abandoned
  • 2014-03-12 EP EP14762500.8A patent/EP2975103A4/fr not_active Withdrawn

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