WO2015083695A1 - Composition de graisse - Google Patents

Composition de graisse Download PDF

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Publication number
WO2015083695A1
WO2015083695A1 PCT/JP2014/081862 JP2014081862W WO2015083695A1 WO 2015083695 A1 WO2015083695 A1 WO 2015083695A1 JP 2014081862 W JP2014081862 W JP 2014081862W WO 2015083695 A1 WO2015083695 A1 WO 2015083695A1
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WIPO (PCT)
Prior art keywords
base oil
lubricating base
oil
grease composition
mass
Prior art date
Application number
PCT/JP2014/081862
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English (en)
Japanese (ja)
Inventor
正和 波多野
坂本　清美
荒井　孝
Original Assignee
Ｊｘ日鉱日石エネルギー株式会社
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Filing date
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Application filed by Ｊｘ日鉱日石エネルギー株式会社 filed Critical Ｊｘ日鉱日石エネルギー株式会社
Priority to JP2015551515A priority Critical patent/JP6682271B2/ja
Priority to CN201480065541.0A priority patent/CN105814178A/zh
Priority to SG11201604115WA priority patent/SG11201604115WA/en
Priority to KR1020167017329A priority patent/KR102238222B1/ko
Publication of WO2015083695A1 publication Critical patent/WO2015083695A1/fr

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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
    • C10M169/02—Mixtures of base-materials and thickeners
    • 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
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions 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
    • 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
    • C10M2207/02—Hydroxy compounds
    • 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
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/106—Carboxylix acids; Neutral salts thereof used as thickening agents
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/1256—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids used as thickening agent
    • 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
    • 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
    • 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
    • C10N2010/02—Groups 1 or 11
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • 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
    • C10N2040/02—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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Definitions

  • the present invention relates to a grease composition.
  • Grease is a lubricant in which a fibrous thickener is dispersed in a base oil to form a semi-solid. It is more likely to adhere to a lubricated part and less likely to flow out compared to a lubricating oil. Therefore, it is possible to make the lubrication system simple, and it is mainly used for lubrication of machine elements such as rolling bearings, plain bearings, ball screws, linear motion guides, gears, etc. for industrial machinery and transportation machinery systems. Widely used.
  • the problem to be solved by the present invention is to provide a grease composition having low sliding resistance and capable of significantly reducing power consumption of machine elements, particularly power consumption during rotation of a bearing.
  • the inventors of the present invention used each base oil alone by mixing a predetermined amount of specific base oils having different properties as the base oil of the grease. It has been found that the power consumption during bearing rotation can be greatly reduced compared to grease.
  • the present inventors pay attention to the oil film forming ability of the bearing sliding portion and the change in viscosity due to the temperature of the lubricating base oil, and form a sufficient oil film between the bearing rolling element and the raceway so that the direct contact between them.
  • large molecular conformation to the components of the base oil specifically be contained components (n-d-M ring analysis% C a) containing an aromatic, and the temperature rise It was found that it is effective to contain a paraffin component having a high viscosity index (% C P by ndM ring analysis) in a well-balanced manner in order to avoid a decrease in viscosity accompanying this.
  • the present invention has been made on the basis of the above findings, and provides the grease composition described in [1] to [9] below.
  • a lubricating base oil and, a grease composition comprising a thickener, wherein the lubricating oil base oil, n-d-M ring analysis value of% C A is 2-8 by ASTM D3238, % C P is 50 to 75 first and the lubricating oil base oil is,% C a of n-d-M ring analysis value by ASTM D3238 of not more than 1,% C P is 70 or more, the urea adduct value of 4 mass % Of the second lubricating base oil, the content of the first lubricating base oil is 5 to 90% by mass based on the total amount of the lubricating base oil, A grease composition having a lubricating base oil content of 10 to 95% by mass.
  • a second lubricating base oil wherein the content of the first lubricating base oil is 5 to 90% by mass based on the total amount of the lubricating base oil, and the second lubricating oil
  • the grease composition of the present invention has a special effect that less power is consumed for rotating the bearing.
  • the grease composition according to the embodiment of the present invention contains a lubricating base oil and a thickener.
  • Lubricant base oil, the first and the lubricating oil base oil n-d-M% C A is 2-8 ring analysis value
  • % C P is 50 to 75 by ASTM D3238
  • ASTM D3238 n-d % of -M ring analysis value C a is 1 or less
  • % C P is 70 or more
  • containing a second lubricating base oil the urea adduct value is not more than 4 mass%, a.
  • the mixing ratio of the first lubricating base oil and the second lubricating base oil is such that the content of the first lubricating base oil is 5 to 90% by mass based on the total amount of the lubricating base oil,
  • the content of the lubricating base oil of No. 2 is 10 to 95% by mass.
  • the base oil component is a base oil constituent molecule having a large three-dimensional structure, specifically an aromatic component (n ⁇ Based on the inventor's knowledge that it is effective to contain% C A ) by dM ring analysis, the first lubricating base oil is used.
  • % C A of the first lubricating base oil is 2-8, preferably 2-6, more preferably 4-6. If% C A is less than 2, the effect of reducing energy loss is insufficient, and if it exceeds 8, the content of paraffin components tends to be relatively small, the viscosity decrease at high temperatures is increased, and the oil film forming ability is increased. This is insufficient.
  • The% C P of the first lubricating base oil 50-75 preferably 60-70. If% Cp is less than 50, the viscosity drop at high temperature is large and the oil film forming ability is poor, and if it exceeds 75, the content of components containing aromatics tends to be relatively small, and the effect of reducing energy loss. Is insufficient.
  • the viscosity index of the first lubricating base oil is preferably 90 to 120, more preferably 95 to 115, and still more preferably 100 to 110.
  • the viscosity index is 90 or more, a decrease in viscosity due to a temperature rise can be suppressed, and the oil film forming ability is further improved.
  • the kinematic viscosity at 40 ° C. of the first lubricating base oil is not particularly limited, but is preferably 10 to 700 mm 2 / s, more preferably 20 to 500 mm from the viewpoint of safely preparing a grease having excellent lubricity. 2 / s, more preferably 25 to 70 mm 2 / s.
  • the viscosity index and the kinematic viscosity at 40 ° C. mean the viscosity index measured according to JIS K2283 and the kinematic viscosity at 40 ° C., respectively.
  • the first lubricating base oil is a lubricating oil fraction obtained by subjecting a crude oil to atmospheric distillation or further distillation under reduced pressure, which has been refined by various refining processes, and is nd according to ASTM D3238.
  • % of -M ring analysis value C a is 2 ⁇ 8,% C P and the like are those 50 to 75.
  • the refining process includes hydrorefining, solvent extraction, solvent dewaxing, and the like, and these can be combined and processed in an appropriate order to obtain the first lubricating base oil of this embodiment.
  • Also useful are mixtures of two or more refined oils of different properties, obtained by different crude oils or distillate oils in different process combinations and sequences.
  • the first lubricating base oil obtained by any method can be preferably used.
  • the present embodiment it is effective to include a chain hydrocarbon component having a low traction coefficient and a paraffin component in the base oil at the closest approach portion between the bearing rolling element and the race ring that are to be elastohydrodynamically lubricated.
  • the second lubricating base oil is used.
  • the present inventors have found that even if there are many paraffin components in the lubricating base oil, if the paraffin components do not have an appropriate branch, the increase in viscosity in the low temperature range will increase, and torque will be reduced when starting the bearing at low temperatures.
  • the urea adduct value is effective as an index of the paraffin content that causes an increase in torque at the start of bearings at low temperatures. Then, the inventors start the operation at a low temperature by mixing the first lubricating base oil with the second lubricating base oil in which the urea adduct value,% C P and% C A respectively satisfy the specific conditions. It has been found that the torque of the bearing can be reduced from the normal temperature to the high temperature range while suppressing the rapid increase in torque.
  • % C A of the second lubricating base oil 1 or less, preferably 0.8 or less. If% C A exceeds 1, a suitable paraffin component having a low traction coefficient cannot be sufficiently supplied to the closest contact portion between the bearing rolling element and the raceway which are elastohydrodynamic lubrication.
  • % C P of the second lubricating base oil is 70 or more, preferably 75 or more, more preferably 80 or more. If% CP is less than 70, the effect of reducing the traction coefficient at the closest part of the bearing rolling element and the raceway which will be elastohydrodynamic lubrication becomes insufficient.
  • the urea adduct value of the second lubricating base oil is 4% by mass or less, preferably 3.5% from the viewpoint of suppressing an increase in viscosity at a low temperature range and suppressing an increase in torque at the start of the bearing at a low temperature. % Or less, more preferably 3% by mass or less.
  • the urea adduct value of the second lubricating base oil may be 0% by mass, but a lubricating base oil having a higher viscosity index can be obtained while sufficiently suppressing an increase in torque at the start of the bearing at a low temperature, Moreover, it is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more, in terms of ease of dewaxing conditions and excellent economic efficiency.
  • the urea adduct value in the present invention is measured by the following method. 100 g of weighed sample oil (lubricating base oil) is placed in a round bottom flask, 200 g of urea, 360 ml of toluene and 40 ml of methanol are added and stirred at room temperature for 6 hours. As a result, white granular crystals are produced as urea adducts in the reaction solution. The reaction solution is filtered through a 1 micron filter to collect the produced white granular crystals, and the obtained crystals are washed 6 times with 50 ml of toluene.
  • the recovered white crystals are put in a flask, 300 ml of pure water and 300 ml of toluene are added, and the mixture is stirred at 80 ° C. for 1 hour.
  • the aqueous phase is separated and removed with a separatory funnel, and the toluene phase is washed three times with 300 ml of pure water.
  • a desiccant sodium sulfate
  • the ratio (mass percentage) of the urea adduct thus obtained to the sample oil is defined as the urea adduct value.
  • the normal paraffin in the case where the normal paraffin remains in the lubricating base oil, as well as the components that cause a torque increase at the start of the bearing at a low temperature among isoparaffins. Can be collected accurately and reliably, it is excellent as an index of the content ratio of normal paraffin and the specific isoparaffin.
  • the present inventors have found that the main component of the urea adduct is a normal paraffin and an isoparaffin urea adduct having 6 or more carbon atoms from the end of the main chain to the branch position. Have confirmed.
  • the viscosity index of the second lubricating base oil is 110 to 150, preferably 115 to 140, and more preferably 125 to 140.
  • the viscosity index is 110 or more, a decrease in viscosity at a high temperature can be suppressed, and the oil film forming ability is further improved.
  • the viscosity index is 150 or less, the production cost for obtaining the lubricating base oil is excellent.
  • the kinematic viscosity at 40 ° C. of the second lubricating base oil is preferably 10 to 5000 mm 2 / s, more preferably 20 to 3000 mm 2 / s, and still more preferably 25 to 70 mm 2 / s.
  • the kinematic viscosity at 40 ° C. is 10 mm 2 / s or more, a reduction in flash point can be suppressed and grease can be produced safely.
  • the kinematic viscosity at 40 ° C. is 5000 mm 2 / s or less, an increase in viscosity resistance can be suppressed, which is further excellent in terms of energy saving characteristics.
  • the second lubricating base oil is preferably at least one selected from mineral oils and synthetic hydrocarbon oils having the above properties.
  • a base oil obtained by mixing mineral oil and synthetic hydrocarbon oil may be used as the second lubricating oil base oil.
  • the mineral oil of the second lubricating base oil is a lubricating oil fraction obtained by purifying distillate obtained by subjecting crude oil to atmospheric distillation or further distillation under reduced pressure by various refining processes, according to ASTM D3238.
  • n-d-M ring analysis value of% C a is 1 or less
  • % C P is 75 or more
  • the urea adduct value include the 4 wt% or less.
  • the refining process includes hydrocracking, hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, and the like, and these are combined in an appropriate order to process the second lubricating base oil component of the present invention. Obtainable.
  • mixtures of two or more refined oils of different properties obtained by different crude oils or distillate oils in different process combinations and sequences.
  • the second lubricating base oil obtained by any method can be preferably used.
  • Synthetic hydrocarbon oils of the second lubricating base oil include, for example, polyolefins such as poly- ⁇ -olefin, polybutene and copolymers of two or more kinds of olefins, alkylbenzene, alkylnaphthalene, etc., according to ASTM D3238.
  • n-d-M ring analysis value of% C a is 1 or less
  • % C P is 75 or more
  • the urea adduct value include the 4 wt% or less.
  • poly- ⁇ -olefin is preferable in view of availability, cost, viscosity characteristics, oxidation stability, and compatibility with system members.
  • a polymer such as 1-dodecene and 1-decene is more preferable in terms of cost.
  • the second lubricating base oil may be composed of only one of mineral oil and synthetic hydrocarbon oil, or may be a mixture of both. That is, as a preferable combination of the first lubricating base oil and the second lubricating base oil, the first lubricating base oil (mineral oil), the second lubricating base oil (mineral oil), and the first Lubricating base oil (mineral oil) and second lubricating base oil (synthetic hydrocarbon oil), or first lubricating base oil (mineral oil) and second lubricating base oil (mineral oil and synthetic carbonized oil) Examples thereof include mixed base oils with hydrogen.
  • the first lubricating base oil (mineral oil), the second lubricating oil base oil (mineral oil), and the second lubricating oil base oil (synthetic hydrocarbon oil) may each be one type or two or more types. There may be.
  • the content of the first lubricating base oil is 5 to 90% by mass, preferably 10 to 80% by mass, more preferably 30 to 60% by mass based on the total amount of the lubricating base oil.
  • the content of the second lubricating base oil is 10 to 95% by mass, preferably 20 to 90% by mass, more preferably 40 to 70% by mass, based on the total amount of the lubricating base oil. If the contents of the first and second lubricating base oils are outside the above ranges, the desired power consumption reduction effect may not be obtained.
  • the content of the lubricating base oil is preferably 70 to 98% by mass, particularly preferably 80 to 97% by mass, based on the total amount of the grease composition.
  • the thickener preferably contains at least one selected from metal soap compounds (also referred to as “metal soap thickeners”) and urea compounds (also referred to as “urea thickeners”).
  • metal soap compounds also referred to as “metal soap thickeners”
  • urea compounds also referred to as “urea thickeners”.
  • Metal soap-based thickeners include single soap and complex soap.
  • the single soap is a metal soap obtained by saponifying a fatty acid or fat with an alkali metal hydroxide or an alkaline earth metal hydroxide.
  • the complex soap is a combination of a fatty acid used in a single soap and an organic acid having a different molecular structure.
  • the fatty acid may be a fatty acid derivative having a hydroxy group or the like.
  • the fatty acid may be an aliphatic carboxylic acid such as stearic acid or an aromatic carboxylic acid such as terephthalic acid.
  • a monovalent or divalent aliphatic carboxylic acid such as an aliphatic carboxylic acid having 6 to 20 carbon atoms is used, and in particular, a monovalent aliphatic carboxylic acid having 12 to 20 carbon atoms or 6 to 14 carbon atoms. These divalent aliphatic carboxylic acids are preferably used.
  • the fatty acid is preferably a monovalent aliphatic carboxylic acid containing one hydroxyl group.
  • the organic acid combined with the fatty acid in the complex soap acetic acid, dibasic acids such as azelaic acid and sebacic acid, benzoic acid and the like are suitable.
  • alkali metals such as lithium and sodium, alkaline earth metals such as calcium, and amphoteric metals such as aluminum are used. Of these, alkali metals, particularly lithium, are preferably used.
  • metal soap thickener may be used alone, or two or more types may be used in combination.
  • the content of the metal soap thickener is, for example, preferably 2 to 30% by mass, more preferably 3 to 20% by mass, and still more preferably 10 to 20% by mass based on the total amount of the grease composition.
  • urea-based thickener for example, a diurea compound obtained by reaction of diisocyanate and monoamine, a polyurea compound obtained by reaction of diisocyanate with monoamine, or diamine can be used.
  • diisocyanates include aliphatic diisocyanates and aromatic diisocyanates.
  • aliphatic diisocyanate include diisocyanates having a saturated and / or unsaturated linear, branched, or alicyclic hydrocarbon group.
  • phenylene diisocyanate, tolylene diisocyanate, diphenyl diisocyanate, diphenylmethane diisocyanate, octadecane diisocyanate, decane diisocyanate, hexane diisocyanate, and the like are preferable.
  • monoamines include aliphatic monoamines and aromatic monoamines.
  • Examples of the aliphatic monoamine include monoamines having a saturated and / or unsaturated linear, branched, or alicyclic hydrocarbon group.
  • examples of diamines include aliphatic diamines and aromatic diamines.
  • examples of the aliphatic diamine include a diamine having a saturated and / or unsaturated linear, branched, or alicyclic hydrocarbon group.
  • ethylenediamine, propanediamine, butanediamine, hexanediamine, octanediamine, phenylenediamine, tolylenediamine, xylenediamine, diaminodiphenylmethane and the like are preferable.
  • Urea thickeners may be used alone or in combination of two or more.
  • the content of the urea-based thickener is, for example, preferably 2 to 30% by mass, more preferably 3 to 20% by mass, and still more preferably 10 to 20% by mass based on the total amount of the grease composition.
  • the grease composition preferably contains an organic molybdenum compound.
  • the organic molybdenum compound include molybdenum dithiocarbamate, molybdenum dithiophosphate, molybdenum amine complex, molybdenum succinimide complex, organic acid molybdenum salt, alcohol molybdenum salt, and the like.
  • molybdenum dithiocarbamate and molybdenum dithiophosphate are preferable from the viewpoint of extending the life of the bearing.
  • molybdenum dithiocarbamate for example, a compound represented by the following general formula (1) can be used.
  • R 1 , R 2 , R 3 and R 4 may be the same or different, and each has 2 to 24 carbon atoms, preferably an alkyl group having 4 to 13 carbon atoms or 6 to 24 carbon atoms, Preferably, it represents a hydrocarbon group such as an aryl group having 8 to 15 carbon atoms (including an alkylaryl group).
  • X 1 , X 2 , X 3 and X 4 may be the same or different and each represents a sulfur atom or an oxygen atom.
  • the alkyl group here includes a primary alkyl group, a secondary alkyl group, and a tertiary alkyl group. These may be linear or branched.
  • alkyl group examples include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, A hexadecyl group, a heptadecyl group, an octadecyl group, etc. are mentioned. These may be primary alkyl groups, secondary alkyl groups, or tertiary alkyl groups, and may be linear or branched.
  • (alkyl) aryl groups include phenyl, tolyl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, octylphenyl, nonylphenyl, decylphenyl, A decylphenyl group, a dodecylphenyl group, etc. are mentioned.
  • the alkyl group in the (alkyl) aryl group may be a primary alkyl group, a secondary alkyl group or a tertiary alkyl group, and may be linear or branched.
  • the (alkyl) aryl group includes all substituted isomers having different substitution positions of the alkyl group with respect to the aryl group.
  • molybdenum dithiocarbamates include, specifically, molybdenum sulfide diethyl dithiocarbamate, molybdenum dipropyldithiocarbamate sulfide, molybdenum dibutyldithiocarbamate, molybdenum dipentyldithiocarbamate sulfide, molybdenum dihexyldithiocarbamate, molybdenum dioctyldithiocarbamate, sulfurized molybdenum dioctyldithiocarbamate, Molybdenum didecyl dithiocarbamate, molybdenum didodecyl dithiocarbamate, molybdenum di (butylphenyl) dithiocarbamate, molybdenum di (nonylphenyl) dithiocarbamate, sulfurized oxymolybdenum diethyldithiocarbamate
  • the alkyl group in these molybdenum dithiocarbamates may be linear or branched, and the bonding position of the alkyl group in the alkylphenyl group is arbitrary.
  • compounds having hydrocarbon groups having different carbon numbers and / or structures in one molecule can also be preferably used.
  • molybdenum dithiophosphate what is marketed as a lubricating oil additive can be used, for example, the compound represented by following General formula (2) can be used.
  • R 5 and R 6 may be the same as or different from each other, and each represents a hydrocarbon group having 1 or more carbon atoms.
  • X 5 , X 6 , X 7 , X 8 and X 9 may be the same or different from each other and each represents an oxygen atom or a sulfur atom.
  • a, b and c each represents an integer of 1 to 6; However, at least one of X 5 , X 6 , X 7 , X 8 and X 9 represents a sulfur atom.
  • Examples of the hydrocarbon group represented by R 5 and R 6 include an alkyl group having 1 to 24 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, an alkylcycloalkyl group having 6 to 11 carbon atoms, and 6 carbon atoms.
  • the content of the organomolybdenum compound is preferably 300 ppm by mass or more, more preferably 500 ppm by mass or more, and still more preferably 600 ppm by mass in terms of the amount of molybdenum element based on the total amount of the grease composition from the viewpoint of extending the life of the bearing. ppm or more, particularly preferably 700 mass ppm or more.
  • the content of the organomolybdenum compound is preferably 50000 mass ppm or less, more preferably 40000 mass ppm or less, more preferably 40000 mass ppm or less in terms of the amount of molybdenum element on the basis of the total amount of the grease composition, from the viewpoint of the effect of addition to bearing performance and production cost.
  • the content of the organic molybdenum compound is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1% by mass or more as the weight of the molybdenum compound, based on the total amount of the grease composition. .
  • the content of the organomolybdenum compound is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 10% by mass or less as the weight of the molybdenum compound on the basis of the total amount of the grease composition from the viewpoint of the effect of addition on bearing performance and production cost. Is 5% by mass or less.
  • the grease composition may contain additives generally used in lubricating oils and greases as necessary.
  • additives include detergents, dispersants, antiwear agents, viscosity index improvers, antioxidants, extreme pressure agents, rust inhibitors, corrosion inhibitors, metal deactivators, and solid lubricants.
  • the content of these additives is preferably 10% by mass or less, more preferably 5% by mass or less, based on the total amount of the grease composition.
  • the consistency of the grease composition is preferably 220 to 300, more preferably 225 to 295, still more preferably 230 to 290, and particularly preferably 230 to 285.
  • the consistency of the grease composition is within the above range, the amount of power consumed for bearing rotation can be greatly reduced.
  • the types and mixing ratios of the first lubricant base oil, the second lubricant base oil and the thickener described above, and the grease composition described below are manufactured.
  • the method of adjusting the mixing method (for example, the frequency
  • the penetration in the present invention means the penetration of penetration measured according to JIS K2220. Specific measurement conditions are as follows. The sample is packed in a penetration measuring pot and kept at 25 ° C., and then mixed 60 times in 1 minute using a specified mixer. Next, after removing the excess sample with a spatula and flattening the surface of the sample, the specified cone is dropped into the sample for 5 seconds, and the blending consistency is 10 times the depth (mm) of penetration. .
  • Another embodiment of the present invention is a grease composition containing a lubricating base oil, a thickener, and an organomolybdenum compound, wherein the lubricating base oil is ndM according to ASTM D3238.
  • the first and the lubricating oil base oil% C a is 2 ⁇ 8% C P of the ring analysis value of 50 ⁇ 75
  • n-d- M ring analysis value of% C a by ASTM D3238 is 1 or less
  • % C P is contained
  • a second lubricating base oil is 70 or more, based on the lubricating base oils the total amount
  • the content of the first lubricating base oil is from 5 to 90 mass%
  • the manufacturing method of the grease composition according to the present embodiment includes a step of obtaining a grease composition by mixing a first lubricating base oil, a second lubricating base oil, and a thickener.
  • the first lubricating base oil and the second lubricating base oil are based on the total amount of the lubricating base oil, and the content of the first lubricating base oil is 5 to 90% by mass. Mixing is performed so that the oil content is 10 to 95% by mass.
  • a thickener prepared in advance may be mixed with the first and second lubricating base oils, or the first lubricating base oil or the second lubricating base oil or these
  • a thickener raw material may be blended with the mixed base oil, and the raw materials may be reacted with each other in the base oil to obtain a thickener.
  • a metal soap thickener when used, it may be blended into the lubricant base oil in the form of metal soap, but the carboxylic acid and metal source (metal salt, metal salt hydroxide, etc.) are separately lubricated. It may be blended with a base oil and reacted with a carboxylic acid and a metal source at the time of grease preparation to form a metal soap thickener.
  • a urea-based thickener When a urea-based thickener is used, it may be added to the lubricating base oil in the form of a urea compound. However, diisocyanate and amine (monoamine, diamine, etc.) may be added to the lubricating base oil and It is good also as a urea type thickener by making it react with an amine.
  • the grease composition obtained by mixing the first lubricant base oil, the second lubricant base oil, and the thickener can be subjected to a dispersion treatment with a roll or a mill as necessary. .
  • Base oil A A base oil A was used as a base oil A having the following properties obtained by solvent purification of a distillate obtained by distilling an atmospheric distillation residue under reduced pressure. Kinematic viscosity at 40 ° C .: 37.6 mm 2 / s Viscosity index: 107 Flash point: 220 ° C % C P : 66 % C A : 5.2
  • Base oil B The bottom fraction obtained from the fuel oil hydrocracking apparatus was used as a raw material for the lubricant base oil, and hydrotreating was performed using a hydrotreating catalyst. At this time, the reaction temperature and the liquid space velocity were adjusted so that the decomposition rate of normal paraffin in the raw material oil was 10% by mass or less. Further, the hydrotreated dewaxing is carried out at a temperature range of 315 to 325 ° C. using a zeolite hydrodewaxing catalyst adjusted to a noble metal content of 0.1 to 5 mass%. And dewaxed oil was obtained. Further, this dewaxed oil was hydrorefined using a hydrorefining catalyst.
  • Base oil C Poly- ⁇ -olefin (Durasyn 166 manufactured by INEOS), which is a synthetic hydrocarbon having the following properties, was used as base oil C.
  • a lubricating base oil having the following properties obtained by distillation and a urea adduct value of 5 mass% was used as the base oil D.
  • Example oil 1-1 to 1-10 Base oils A, B, C and D were put in a stainless steel container in the blending amounts (shown in mass%) shown in Tables 1 and 2.
  • a urea compound is used as a thickener
  • the amine and isocyanate which are raw materials of the urea compound, are added to the lubricating base oil in the container, heated to 150 ° C., stirred with a magnetic stirrer, and the amine and diisocyanate are added. Reacted. And after dehydration, the semi-solid composition was obtained by cooling to room temperature.
  • lithium stearate was added to the lubricating base oil, heated to 200 ° C., and then cooled to obtain a semisolid composition. Further, di-t-butyl-p-cresol, which is a phenolic antioxidant, is added to each of the obtained semisolid compositions, and dispersion treatment is performed with three rolls, and the compositions shown in Tables 1 and 2 are obtained. A grease composition was obtained.
  • Example oil 2-1 to 2-12 Base oils A, B, C and D, and a thickener were placed in a stainless steel container in the amounts shown in Tables 3 to 5 (indicated by mass%).
  • a metal soap compound single soap
  • lithium stearate was added to the lubricating base oil, heated to 200 ° C., and then cooled to obtain a semisolid composition.
  • a metal soap compound complex soap
  • 12-hydroxystearic acid, azelaic acid, and lithium hydroxide are added to the lubricating base oil and heated to 200 ° C. to react to form a complex soap.
  • a semi-solid composition was obtained by cooling.
  • the amine and isocyanate which are raw materials of the urea compound, are added to the lubricating base oil in the container, heated to 150 ° C., stirred with a magnetic stirrer, and amine and Diisocyanate was reacted. And after dehydration, the semi-solid composition was obtained by cooling to room temperature. Further, di-t-butyl-p-cresol, which is a phenolic antioxidant, was added to each of the obtained semisolid compositions and dispersed with three rolls to have the compositions shown in Tables 3-5. A grease composition was obtained. Further, the consistency (mixing consistency) of the obtained grease composition was measured according to JIS K2220.
  • the accumulated power consumption (kW) in the continuous rotation for 2 hours was compared at 1300 rpm and the temperature at room temperature. The number of repeated experiments was three. The results obtained are shown in Tables 3-5. In Tables 3 to 5, the bearing power consumption and the power reduction rate (%: test oil 2-11 standard) are average values of three experiments.
  • Base oils A and B, thickeners, and organic molybdenum compounds include molybdenum dithiocarbamate (molybdenum element content 29 mass%, sulfur element content 28 mass%) and molybdenum dithiophosphate (molybdenum element content 8 mass%).
  • %, Phosphorus element content of 6% by mass, sulfur element content of 12% by mass) were put in a stainless steel container with the blending amounts shown in Tables 6 to 7 (indicated by mass%, together with the converted value of molybdenum element). .
  • lithium stearate When using a metal soap compound (single soap) as a thickener, lithium stearate was added to the lubricating base oil, heated to 200 ° C., and then cooled to obtain a semisolid composition. .
  • a metal soap compound compound (complex soap) is used as a thickener, 12-hydroxystearic acid, azelaic acid, and lithium hydroxide are added to the lubricating base oil and heated to 200 ° C. to react to form a complex soap. A semi-solid composition was obtained by cooling.
  • the amine and isocyanate which are raw materials of the urea compound, are added to the lubricating base oil in the container, heated to 150 ° C., stirred with a magnetic stirrer, and amine and Diisocyanate was reacted. And after dehydration, the semi-solid composition was obtained by cooling to room temperature.
  • other additives phenolic antioxidant, corrosion inhibitor, etc.
  • the grease composition of the present invention has an extraordinary effect that less power is consumed for rotating the bearing. Therefore, the grease of the present invention can be suitably used for lubrication of machine elements such as rolling bearings, plain bearings, ball screws, linear motion guides, and gears, and is useful in industrial machines and transportation machine systems.

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

Abstract

　La présente invention concerne une composition de graisse contenant une huile de base lubrifiante et un agent épaississant, l'huile de base lubrifiante contenant une première huile de base lubrifiante ayant une valeur d'analyse cyclique n-d-M en % de Ca, conformément à la norme ASTM D3238, située dans la plage allant de 2 à 8, et en % de Cp, située dans la plage allant de 50 à 75, et une seconde huile de base lubrifiante ayant une valeur d'analyse cyclique n-d-M en % de Ca, conformément à la norme ASTM D3238, inférieure ou égale à 1, en % de Cp, supérieure ou égale à 70, et une valeur en produit d'addition d'urée inférieure ou égale à 4 % en masse, et présentant une teneur en première huile de base lubrifiante située dans la plage allant de 5 à 90 % en masse et une teneur en seconde huile de base lubrifiante située dans la plage allant de 10 à 95 % en masse par rapport à la quantité totale d'huile de base lubrifiante.
PCT/JP2014/081862 2013-12-02 2014-12-02 Composition de graisse WO2015083695A1 (fr)

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CN201480065541.0A CN105814178A (zh) 2013-12-02 2014-12-02 润滑脂组合物
SG11201604115WA SG11201604115WA (en) 2013-12-02 2014-12-02 Grease composition
KR1020167017329A KR102238222B1 (ko) 2013-12-02 2014-12-02 그리스 조성물

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JP2017024096A (ja) * 2015-07-17 2017-02-02 日本電産サンキョー株式会社 産業用ロボットおよび産業用ロボットの制御方法
EP3960840A4 (fr) * 2019-04-26 2023-01-25 NTN Corporation Composition de graisse pour roulement à rouleaux coniques et roulement à rouleaux coniques

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JPWO2019044624A1 (ja) * 2017-08-31 2020-08-13 出光興産株式会社 グリース組成物

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WO1994003565A1 (fr) * 1992-08-05 1994-02-17 Koyo Seiko Co., Ltd. Graisse pour roulements a rouleaux et roulement a rouleaux a graisse piegee
JPH06108078A (ja) * 1992-09-30 1994-04-19 Showa Shell Sekiyu Kk 潤滑グリース組成物
JP2010090257A (ja) * 2008-10-07 2010-04-22 Nippon Oil Corp 潤滑油基油及びその製造方法、潤滑油組成物

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EP2581437B2 (fr) * 2008-10-07 2019-05-01 JX Nippon Oil & Energy Corporation Procédé de production de huile de base lubrifiante et composition d'huile lubrifiante
JP5815223B2 (ja) 2010-11-12 2015-11-17 Ｊｘ日鉱日石エネルギー株式会社 エンジン油組成物
JP5789111B2 (ja) * 2011-03-25 2015-10-07 Ｊｘ日鉱日石エネルギー株式会社 潤滑油組成物
WO2013079559A1 (fr) * 2011-11-28 2013-06-06 Shell Internationale Research Maatschappij B.V. Composition de graisse
JP2014205860A (ja) * 2014-08-04 2014-10-30 Ｊｘ日鉱日石エネルギー株式会社 潤滑油基油及びその製造方法、潤滑油組成物

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WO1994003565A1 (fr) * 1992-08-05 1994-02-17 Koyo Seiko Co., Ltd. Graisse pour roulements a rouleaux et roulement a rouleaux a graisse piegee
JPH06108078A (ja) * 1992-09-30 1994-04-19 Showa Shell Sekiyu Kk 潤滑グリース組成物
JP2010090257A (ja) * 2008-10-07 2010-04-22 Nippon Oil Corp 潤滑油基油及びその製造方法、潤滑油組成物

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017024096A (ja) * 2015-07-17 2017-02-02 日本電産サンキョー株式会社 産業用ロボットおよび産業用ロボットの制御方法
EP3960840A4 (fr) * 2019-04-26 2023-01-25 NTN Corporation Composition de graisse pour roulement à rouleaux coniques et roulement à rouleaux coniques
US11851627B2 (en) 2019-04-26 2023-12-26 Ntn Corporation Grease composition for tapered roller bearing and tapered roller bearing

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KR20160093041A (ko) 2016-08-05
JP6826651B2 (ja) 2021-02-03
JP6682271B2 (ja) 2020-04-15
CN105814178A (zh) 2016-07-27
JP2020041162A (ja) 2020-03-19
KR102238222B1 (ko) 2021-04-09
JPWO2015083695A1 (ja) 2017-03-16
SG10201804545UA (en) 2018-07-30

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