WO2016080264A1 - 冷凍機油及び冷凍機用作動流体組成物 - Google Patents
冷凍機油及び冷凍機用作動流体組成物 Download PDFInfo
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- WO2016080264A1 WO2016080264A1 PCT/JP2015/081742 JP2015081742W WO2016080264A1 WO 2016080264 A1 WO2016080264 A1 WO 2016080264A1 JP 2015081742 W JP2015081742 W JP 2015081742W WO 2016080264 A1 WO2016080264 A1 WO 2016080264A1
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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
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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
- 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
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
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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
- 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
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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
- 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
- C10M171/008—Lubricant compositions compatible with refrigerants
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/126—Unsaturated fluorinated hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/22—All components of a mixture being fluoro compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/24—Only one single fluoro component present
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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
- 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
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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
- 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
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
- C10M2207/042—Epoxides
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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
- 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
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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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/066—Arylene diamines
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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
- 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
- C10M2223/041—Triaryl phosphates
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- 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
- C10N2020/071—Branched chain compounds
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- 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
- C10N2020/09—Characteristics associated with water
- C10N2020/097—Refrigerants
- C10N2020/101—Containing Hydrofluorocarbons
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- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- 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
- C10N2040/30—Refrigerators lubricants or compressors lubricants
Definitions
- the present invention relates to a refrigerating machine oil and a working fluid composition for a refrigerating machine.
- HFC chlorofluorocarbon
- HCFC hydrochlorofluorocarbon
- HFC-134a which is standardly used as a refrigerant for car air conditioners, has zero ozone depletion potential (ODP) but high global warming potential (GWP). It is targeted.
- Patent Document 1 discloses a trifluoroethylene (HFO-1123) refrigerant as a refrigerant that has little influence on the ozone layer and has a low GWP.
- refrigerating machine oils have compatibility and lubricity with refrigerants depending on the type of refrigerant that coexists. In order to show unpredictable behaviors such as melt viscosity with refrigerant, thermal and chemical stability, it is necessary to develop refrigeration oil for each refrigerant.
- An object of the present invention is to provide a refrigerating machine oil excellent in compatibility with a trifluoroethylene (HFO-1123) refrigerant, and a working fluid composition for a refrigerating machine containing the refrigerating machine oil.
- HFO-1123 trifluoroethylene
- the present invention relates to a base oil containing an ester of a fatty acid and a polyhydric alcohol in which the ratio of a branched fatty acid having 4 to 9 carbon atoms is 20 to 100 mol%, and 0.2 to 0.5 mass based on the total amount of refrigerating machine oil.
- Phenol-based antioxidant is 2,6-di-tert. It preferably contains -butyl-p-cresol.
- the present invention also provides a working fluid composition for a refrigerator containing the above-described refrigerator oil and a trifluoroethylene refrigerant.
- a refrigerating machine oil excellent in compatibility with a trifluoroethylene (HFO-1123) refrigerant and a working fluid composition for a refrigerating machine containing the refrigerating machine oil can be provided.
- the refrigerating machine oil includes a base oil containing an ester of a fatty acid and a polyhydric alcohol in which the ratio of branched fatty acids having 4 to 9 carbon atoms is 20 to 100 mol%, and 0.2 based on the total amount of refrigerating machine oil. And 0.5% by mass of a phenolic antioxidant, and is used together with a trifluoroethylene refrigerant.
- the working fluid composition for a refrigerator according to the present embodiment includes a base oil containing an ester of a fatty acid and a polyhydric alcohol in which the proportion of a branched fatty acid having 4 to 9 carbon atoms is 20 to 100 mol%,
- a working fluid composition for a refrigerating machine comprising a refrigerating machine oil containing 0.2 to 0.5% by mass of a phenolic antioxidant based on the total amount of machine oil, and a trifluoroethylene refrigerant.
- the working fluid composition for a refrigerator according to the present embodiment includes an embodiment containing the refrigerator oil according to the present embodiment and a trifluoroethylene refrigerant.
- the base oil according to this embodiment contains an ester of a fatty acid and a polyhydric alcohol in which the proportion of the branched fatty acid having 4 to 9 carbon atoms is 20 to 100 mol%.
- Specific examples of the branched fatty acid having 4 to 9 carbon atoms include branched butanoic acid, branched pentanoic acid, branched hexanoic acid, branched heptanoic acid, branched octanoic acid, and branched nonane. Examples include acids.
- fatty acids having a branch at the ⁇ -position and / or ⁇ -position are preferred, and isobutanoic acid, 2-methylbutanoic acid, 2-methylpentanoic acid, 2-methylhexanoic acid, 2-ethylpentanoic acid, 2-methyl Heptanoic acid, 2-ethylhexanoic acid, 3,5,5-trimethylhexanoic acid and the like are preferable, among which 2-ethylhexanoic acid and / or 3,5,5-trimethylhexanoic acid are more preferable.
- the fatty acid may contain a fatty acid other than a branched fatty acid having 4 to 9 carbon atoms.
- fatty acids other than branched fatty acids having 4 to 9 carbon atoms include linear fatty acids having 4 to 9 carbon atoms (that is, n-butanoic acid, n-pentanoic acid, n-hexanoic acid, n-heptanoic acid, n-octane). Acid, n-nonanoic acid) is preferably used. Among these, pentanoic acid and / or heptanoic acid are more preferable.
- the fatty acid may contain, for example, a fatty acid having 10 to 24 carbon atoms as a fatty acid other than the fatty acid having 4 to 9 carbon atoms.
- fatty acids other than fatty acids having 4 to 9 carbon atoms include linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear Linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecanoic acid, linear Or branched octadecanoic acid, linear or branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicoic acid, linear or branched docosanoic acid, linear And straight or branched tetracosanoic acid, and
- the proportion of the branched fatty acid having 4 to 9 carbon atoms in the fatty acid is 20 mol% or more, preferably 30 mol% or more, more preferably 50 mol%, from the viewpoint of improving the stability in the presence of a trifluoroethylene refrigerant. More than mol%.
- the proportion of the branched fatty acid having 4 to 9 carbon atoms in the fatty acid is 100 mol% or less, preferably 80 mol% or less, more preferably 60 mol%, from the viewpoint of improving lubricity in the presence of a trifluoroethylene refrigerant. It is less than mol%.
- the ratio of the branched fatty acid having 4 to 9 carbon atoms in the fatty acid is preferably 20 to 100 mol%, 20 to 80 mol%, 20 to 60 mol%, 30-100 mol%, 30-80 mol%, 30-60 mol%, 50-100 mol%, 50-80 mol%, or 50-60 mol%.
- a polyhydric alcohol having 2 to 6 hydroxyl groups is preferably used.
- the number of carbon atoms of the polyhydric alcohol is preferably 4 to 12, and more preferably 5 to 10.
- hindered alcohols such as neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, di- (trimethylol propane), tri- (trimethylol propane), pentaerythritol, dipentaerythritol are preferable.
- Pentaerythritol or a mixed ester of pentaerythritol and dipentaerythritol) is more preferred because it is particularly excellent in compatibility with the refrigerant and hydrolytic stability.
- the base oil according to the present embodiment includes, in addition to an ester of a fatty acid and a polyhydric alcohol in which the proportion of a branched fatty acid having 4 to 9 carbon atoms is 20 to 100 mol%, for example, an ester other than the ester, a polyalkylene glycol, It may further contain an oxygen-containing oil such as polyvinyl ether, or a hydrocarbon oil such as mineral oil, olefin polymer, naphthalene compound, or alkylbenzene.
- the content of esters of fatty acids and polyhydric alcohols in which the proportion of branched fatty acids having 4 to 9 carbon atoms is 20 to 100 mol% is preferably 50% by mass or more based on the total amount of refrigerating machine oil, and 70% by mass. More preferably, it is more preferably 90% by mass or more.
- phenolic antioxidants examples include 4,4′-methylenebis (2,6-di-tert.-butylphenol), 4,4′-bis (2,6-di-tert.-butylphenol), 4, 4'-bis (2-methyl-6-tert.-butylphenol), 2,2'-methylenebis (4-ethyl-6-tert.-butylphenol), 2,2'-methylenebis (4-methyl-6-tert) .-Butylphenol), 4,4'-butylidenebis (3-methyl-6-tert.-butylphenol), 4,4'-isopropylidenebis (2,6-di-tert.-butylphenol), 2,2'- Methylenebis (4-methyl-6-nonylphenol), 2,2'-isobutylidenebis (4,6-dimethylphenol), 2,2'-methylene Scan (4-methyl-6-cyclohexyl phenol), 2,6-di-tert..
- -Butyl-4-hydroxyphenyl substituted fatty acid esters and the like may be used individually by 1 type, or 2 or more types may be mixed and used for them.
- phenol-based antioxidant 2,6-di-tert. Is used from the viewpoint of improving the stability in the presence of a trifluoroethylene refrigerant. -Butyl-p-cresol is preferred.
- the content of the phenolic antioxidant is preferably 0.2% by mass or more, more preferably 0.25% by mass or more, based on the total amount of refrigerating machine oil, from the viewpoint of improving the stability in the presence of a trifluoroethylene refrigerant. More preferably, it is 0.3% by mass or more.
- the content of the phenolic antioxidant is preferably 0.5% by mass or less, more preferably 0.45% by mass or less, and still more preferably 0.8% by mass based on the total amount of the refrigerating machine oil from the viewpoint of suppressing coloring of the refrigerating machine oil. 4% by mass or less.
- the content of the phenolic antioxidant is preferably 0.2 to 0.5% by mass, 0 from the viewpoint of achieving both improvement in stability in the presence of a trifluoroethylene refrigerant and suppression of coloring of refrigerating machine oil. 0.2 to 0.45% by mass, 0.2 to 0.4% by mass, 0.25 to 0.5% by mass, 0.25 to 0.45% by mass, 0.25 to 0.4% by mass, 0 0.3 to 0.5 mass%, 0.3 to 0.45 mass%, or 0.3 to 0.4 mass%.
- the refrigerating machine oil according to this embodiment may further contain other additives in addition to the phenolic antioxidant.
- Other additives include acid scavengers, antioxidants other than phenolic oxidants, extreme pressure agents, oiliness agents, antifoaming agents, metal deactivators, antiwear agents, viscosity index improvers, pour point depressants Agents, detergent dispersants and the like.
- the content of other additives can be, for example, 5% by mass or less based on the total amount of the refrigerating machine oil.
- the refrigerating machine oil preferably further contains an acid scavenger from the viewpoint of further improving the thermal and chemical stability.
- the acid scavenger include epoxy compounds and carbodiimide compounds.
- the epoxy compound is not particularly limited, and examples thereof include glycidyl ether type epoxy compounds, glycidyl ester type epoxy compounds, oxirane compounds, alkyl oxirane compounds, alicyclic epoxy compounds, epoxidized fatty acid monoesters, and epoxidized vegetable oils. These epoxy compounds can be used individually by 1 type or in combination of 2 or more types.
- Examples of the glycidyl ether type epoxy compound include n-butylphenyl glycidyl ether, i-butylphenyl glycidyl ether, sec-butylphenyl glycidyl ether, tert.
- glycidyl ester type epoxy compound examples include glycidyl benzoate, glycidyl neodecanoate, glycidyl-2,2-dimethyloctanoate, glycidyl acrylate, and glycidyl methacrylate.
- An alicyclic epoxy compound is a compound having a partial structure represented by the following general formula (1), in which carbon atoms constituting an epoxy group directly constitute an alicyclic ring.
- Examples of the alicyclic epoxy compounds include 1,2-epoxycyclohexane, 1,2-epoxycyclopentane, 3 ′, 4′-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, bis (3,4-epoxycyclohexyl).
- Methyl) adipate exo-2,3-epoxynorbornane, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, 2- (7-oxabicyclo [4.1.0] hept-3-yl)- Spiro (1,3-dioxane-5,3 ′-[7] oxabicyclo [4.1.0] heptane, 4- (1′-methylepoxyethyl) -1,2-epoxy-2-methylcyclohexane, 4 -Epoxyethyl-1,2-epoxycyclohexane.
- allyloxirane compound examples include 1,2-epoxystyrene and alkyl-1,2-epoxystyrene.
- alkyloxirane compounds examples include 1,2-epoxybutane, 1,2-epoxypentane, 1,2-epoxyhexane, 1,2-epoxyheptane, 1,2-epoxyoctane, 1,2-epoxynonane, 1, 2-epoxydecane, 1,2-epoxyundecane, 1,2-epoxydodecane, 1,2-epoxytridecane, 1,2-epoxytetradecane, 1,2-epoxypentadecane, 1,2-epoxyhexadecane, 1, Examples include 2-epoxyheptadecane, 1,2-epoxyoctadecane, 1,2-epoxynonadecane, and 1,2-epoxyicosane.
- Examples of the epoxidized fatty acid monoester include esters of an epoxidized fatty acid having 12 to 20 carbon atoms and an alcohol having 1 to 8 carbon atoms, phenol, or alkylphenol.
- esters of an epoxidized fatty acid having 12 to 20 carbon atoms and an alcohol having 1 to 8 carbon atoms, phenol, or alkylphenol are preferably used.
- butyl, hexyl, benzyl, cyclohexyl, methoxyethyl, octyl, phenyl and butylphenyl esters of epoxy stearate are preferably used.
- Examples of the epoxidized vegetable oil include epoxy compounds of vegetable oils such as soybean oil, linseed oil and cottonseed oil.
- the carbodiimide compound is not particularly limited, and for example, dialkylcarbodiimide, diphenylcarbodiimide, and bis (alkylphenyl) carbodiimide can be used.
- dialkyl carbodiimide examples include diisopropyl carbodiimide and dicyclohexyl carbodiimide.
- bis (alkylphenyl) carbodiimide examples include ditolylcarbodiimide, bis (isopropylphenyl) carbodiimide, bis (diisopropylphenyl) carbodiimide, bis (triisopropylphenyl) carbodiimide, bis (butylphenyl) carbodiimide, bis (dibutylphenyl) carbodiimide, bis (Nonylphenyl) carbodiimide and the like can be mentioned.
- the refrigerating machine oil preferably further contains a phosphorus-based extreme pressure agent from the viewpoint of further improving the wear resistance among the above-mentioned additives.
- a phosphorus-based extreme pressure agent examples include phosphoric acid esters, acidic phosphoric acid esters, thiophosphoric acid esters, amine salts of acidic phosphoric acid esters, chlorinated phosphoric acid esters, and phosphorous acid esters.
- Phosphate esters include tributyl phosphate, tripentyl phosphate, trihexyl phosphate, triheptyl phosphate, trioctyl phosphate, trinonyl phosphate, tridecyl phosphate, triundecyl phosphate, tridodecyl phosphate, tritridecyl phosphate, tritetradecyl phosphate , Tripentadecyl phosphate, trihexadecyl phosphate, triheptadecyl phosphate, trioctadecyl phosphate, trioleyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, etc. Can be mentioned.
- acidic phosphate esters include monobutyl acid phosphate, monopentyl acid phosphate, monohexyl acid phosphate, monoheptyl acid phosphate, monooctyl acid phosphate, monononyl acid phosphate, monodecyl acid phosphate, monoundecyl acid phosphate, monododecyl Acid phosphate, monotridecyl acid phosphate, monotetradecyl acid phosphate, monopentadecyl acid phosphate, monohexadecyl acid phosphate, monoheptadecyl acid phosphate, monooctadecyl acid phosphate, monooleyl acid phosphate, dibutyl acid phosphate, dipentyl acid , Dihexylua Phosphate, diheptyl acid phosphate, dioctyl acid phosphate, dinonyl acid phosphate, didecyl acid phosphate
- thiophosphates examples include tributyl phosphorothioate, tripentyl phosphorothionate, trihexyl phosphorothionate, triheptyl phosphorothionate, trioctyl phosphorothionate, trinonyl phosphorothionate, tridecyl phosphorothioate.
- Phorothionate triundecyl phosphorothionate, tridodecyl phosphorothionate, tritridecyl phosphorothionate, tritetradecyl phosphorothionate, tripentadecyl phosphorothionate, trihexadecyl phosphorothionate, Triheptadecyl phosphorothioate, trioctadecyl phosphorothionate, trioleyl phosphorothionate, triphenyl phosphorothionate, tricresyl phosphorothionate, trikis Les sulfonyl phosphorothionate, cresyldiphenyl phosphorothionate, like carboxymethyl Les sulfonyl diphenyl phosphorothionate.
- Examples of the amine salt of acidic phosphate ester include methylamine, ethylamine, propylamine, butylamine, pentylamine, hexylamine, heptylamine, octylamine, dimethylamine, diethylamine, dipropylamine, and dibutylamine.
- salts with amines such as dipentylamine, dihexylamine, diheptylamine, dioctylamine, trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, trihexylamine, triheptylamine, and trioctylamine.
- chlorinated phosphate ester examples include tris-dichloropropyl phosphate, tris-chloroethyl phosphate, tris-chlorophenyl phosphate, polyoxyalkylene bis [di (chloroalkyl)] phosphate and the like.
- the content of the phosphorus-based extreme pressure agent is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, based on the total amount of refrigerating machine oil, from the viewpoint of improving lubricity in the presence of a trifluoroethylene refrigerant. More preferably, it is 0.9 mass% or more.
- the content of the phosphorus-based extreme pressure agent is preferably 2.0% by mass or less, more preferably 1.5% by mass or less, based on the total amount of refrigerating machine oil, from the viewpoint of improving stability in the presence of a trifluoroethylene refrigerant. More preferably, it is 1.0 mass% or less.
- the content of the base oil should be 80% by mass or more based on the total amount of the refrigerating machine oil in order to be excellent in characteristics required for the refrigerating machine oil such as lubricity, compatibility, thermal / chemical stability, and electrical insulation. Preferably, it is 90 mass% or more, and it is still more preferable that it is 95 mass% or more.
- the kinematic viscosity at 40 ° C. of the refrigerating machine oil is preferably 3 to 1000 mm 2 / s, more preferably 4 to 500 mm 2 / s, and further preferably 5 to 400 mm 2 / s.
- the kinematic viscosity of the refrigerating machine oil at 100 ° C. may be preferably 1 to 100 mm 2 / s, more preferably 2 to 50 mm 2 / s.
- the kinematic viscosity in the present invention means a kinematic viscosity measured according to JIS K2283.
- the pour point of the refrigerating machine oil may be preferably ⁇ 10 ° C. or lower, more preferably ⁇ 20 ° C. or lower.
- the pour point in the present invention means a pour point measured according to JIS K2269.
- the volume resistivity of the refrigerating machine oil is preferably 1.0 ⁇ 10 9 ⁇ ⁇ m or more, more preferably 1.0 ⁇ 10 10 ⁇ ⁇ m or more, and further preferably 1.0 ⁇ 10 11 ⁇ ⁇ m or more. It's okay. In particular, when it is used for a hermetic refrigerator, high electrical insulation tends to be required.
- the volume resistivity in the present invention means a volume resistivity at 25 ° C. measured in accordance with JIS C2101 “Electrical insulating oil test method”.
- the water content of the refrigerating machine oil is preferably 200 ppm or less, more preferably 100 ppm or less, and even more preferably 50 ppm or less, based on the total amount of the refrigerating machine oil.
- the water content is small from the viewpoint of the influence on the thermal / chemical stability and electrical insulation of the refrigerator oil.
- the acid value of the refrigerating machine oil is preferably 0.1 mgKOH / g or less, in order to prevent corrosion of the metal used in the refrigerating machine or piping, and to prevent decomposition of the ester contained in the refrigerating machine oil. Preferably it may be 0.05 mgKOH / g or less.
- the acid value in the present invention means an acid value measured in accordance with JIS K2501 “Petroleum products and lubricating oils—neutralization number test method”.
- the ash content of the refrigerating machine oil is preferably 100 ppm or less, more preferably 50 ppm or less, in order to increase the thermal and chemical stability of the refrigerating machine oil and suppress the generation of sludge and the like.
- the ash content in the present invention means ash content measured according to JIS K2272 “Crude oil and petroleum product ash content and sulfate ash test method”.
- the refrigerating machine oil according to the present embodiment is used together with a trifluoroethylene (HFO-1123) refrigerant. Further, the working fluid composition for a refrigerator according to the present embodiment contains a trifluoroethylene (HFO-1123) refrigerant.
- the refrigerant used together with the refrigerating machine oil according to the present embodiment and the refrigerant contained in the working fluid composition for a refrigerating machine according to the present embodiment include a saturated fluorinated hydrocarbon refrigerant, a non-refrigerated refrigerant, in addition to trifluoroethylene (HFO-1123). It may further contain a known refrigerant such as a saturated fluorinated hydrocarbon refrigerant.
- the content of trifluoroethylene (HFO-1123) is preferably 90% by mass or less, more preferably 60% by mass or less, based on the total amount of the refrigerant, from the viewpoint of the stability of the refrigerating machine oil in the refrigerant atmosphere.
- the content of trifluoroethylene is preferably 20% by mass or more, more preferably 40% by mass or more, and more preferably 50% by mass or more based on the total amount of refrigerant from the viewpoint of GWP reduction. More preferably, it is particularly preferably 60% by mass or more, and most preferably 90% by mass or more.
- Saturated fluorinated hydrocarbon refrigerants include difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1,1,2, Tetrafluoroethane (HFC-134a), 1,1-difluoroethane (HFC-152a), fluoroethane (HFC-161), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) ), 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), 1,1,1,3,3,3-hexafluoropropane (HFC-236fa), 1,1,1,1, Selected from the group consisting of 3,3-pentafluoropropane (HFC-245fa) and 1,1,1,3,3-pentafluorobutane (HFC-365mfc)
- HFC-32 difluoromethane
- Examples of the unsaturated fluorinated hydrocarbon refrigerant include 1,2,3,3,3-pentafluoropropene (HFO-1225ye), 1,3,3,3-tetrafluoropropene (HFO-1234ze), 2,3, Selected from the group consisting of 3,3-tetrafluoropropene (HFO-1234yf), 1,2,3,3-tetrafluoropropene (HFO-1234ye), and 3,3,3-trifluoropropene (HFO-1243zf)
- 1,2,3,3,3-tetrafluoropropene (HFO-1234yf) is preferable from the viewpoint of stability of refrigerating machine oil in a refrigerant atmosphere and reduction of GWP.
- the content of the refrigerating machine oil in the working fluid composition for a refrigerating machine is not particularly limited, but may be preferably 1 to 500 parts by mass, more preferably 2 to 400 parts by mass with respect to 100 parts by mass of the refrigerant.
- the working fluid composition for refrigerating machine and the refrigerating machine oil according to the present embodiment are preferably used for a room air conditioner, a refrigerator, or an open or sealed car air conditioner having a reciprocating or rotating hermetic compressor.
- the working fluid composition for refrigerating machine and the refrigerating machine oil according to the present embodiment are preferably used for a dehumidifier, a water heater, a freezer, a freezer / refrigerated warehouse, a vending machine, a showcase, a cooling device for a chemical plant, and the like.
- the working fluid composition for refrigerating machine and the refrigerating machine oil according to this embodiment are also preferably used for a refrigerating machine having a centrifugal compressor.
- a polyol ester of a fatty acid and a polyhydric alcohol having the composition shown in Table 1 was prepared.
- Abbreviations in the table represent the following compounds.
- iC4 2-methylpropanoic acid
- nC5 n-pentanoic acid
- iC8 2-ethylhexanoic acid
- iC9 3,5,5-trimethylhexanoic acid
- PET pentaerythritol
- Test oils having the compositions shown in Tables 2 and 3 were prepared using the base oil and the additives shown below.
- Additive 1 2,6-di-tert.
- -Butyl-p-cresol additive 2 dioctyl diphenylamine additive
- 3 tricresyl phosphate additive
- 4 glycidyl neodecanoate additive
- 5 2-ethylhexyl glycidyl ether
- a wear resistance test was performed using a high-pressure atmosphere friction tester (rotating sliding method of rotating vane material and fixed disk material) manufactured by Shinko Machine Co., Ltd., which can create a refrigerant atmosphere similar to that of an actual compressor.
- the pressure in the test vessel was 1.6 MPa
- the oil amount was 600 ml
- the test temperature was 110 ° C.
- the rotation speed was 500 rpm
- the load was 80 kgf
- the test time was 1 hour.
- SKH-51 was used as the vane material
- FC250 was used as the disk material.
- the wear resistance was evaluated based on the wear depth of the vane material because the amount of wear of the disk material was extremely small.
- each of the following mixed refrigerants A to C was used.
- the stability test was conducted according to JIS K2211-09 (autoclave test). Specifically, 80 g of test oil whose water content was adjusted to 100 ppm was weighed in an autoclave, and the catalyst (iron, copper, aluminum wires, each outer diameter 1.6 mm ⁇ length 50 mm), and the above After 20 g of any of the mixed refrigerants A to C were sealed, the mixture was heated to 140 ° C., and the acid value (JIS C2101) of the test oil after 150 hours was measured.
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Abstract
Description
iC4:2-メチルプロパン酸
nC5:n-ペンタン酸
iC8:2-エチルヘキサン酸
iC9:3,5,5-トリメチルヘキサン酸
PET:ペンタエリスリトール
添加剤1:2,6-ジ-tert.-ブチル-p-クレゾール
添加剤2:ジオクチルジフェニルアミン
添加剤3:トリクレジルホスフェート
添加剤4:グリシジルネオデカノエート
添加剤5:2-エチルヘキシルグリシジルエーテル
(耐摩耗性試験)
実コンプレッサと類似の冷媒雰囲気にできる、神鋼造機(株)製の高圧雰囲気摩擦試験機(回転ベーン材と固定ディスク材との回転しゅう動方式)を用いて、耐摩耗性試験を行った。試験条件としては、試験容器内圧力1.6MPa、油量600ml、試験温度110℃、回転数500rpm、負荷荷重80kgf、試験時間1時間とした。ベーン材としてはSKH-51、ディスク材としてはFC250を用いた。耐摩耗性の評価は、ディスク材の摩耗量が極めて少ないことから、ベーン材の摩耗深さによって行った。冷媒としては、下記混合冷媒A~Cのそれぞれを用いた。
混合冷媒A:2,3,3,3-テトラフルオロプロペン(HFO-1234yf)とトリフルオロエチレン(HFO-1123)との混合冷媒(質量比(HFO-1234yf/HFO-1123)=80/20)
混合冷媒B:ジフルオロメタン(HFC-32)とトリフルオロエチレン(HFO-1123)との混合冷媒(質量比(HFC-32/HFO-1123)=40/60)
混合冷媒C:1,1,1,2-テトラフルオロエタン(HFC-134a)とトリフルオロエチレン(HFO-1123)との混合冷媒(質量比(HFC-134a/HFO-1123)=20/80)
(安定性試験)
安定性試験は、JIS K2211-09(オートクレーブテスト)に準拠して行った。具体的には、含有水分量を100ppmに調整した供試油80gをオートクレーブに秤取し、触媒(鉄、銅、アルミの線、いずれも外径1.6mm×長さ50mm)、及び、上記混合冷媒A~Cのいずれか20gを封入した後、140℃に加熱し、150時間後の供試油の酸価(JIS C2101)を測定した。
Claims (3)
- 炭素数4~9の分岐脂肪酸の割合が20~100モル%である脂肪酸と多価アルコールとのエステルを含有する基油と、
冷凍機油全量基準で0.2~0.5質量%のフェノール系酸化防止剤と、
を含有し、トリフルオロエチレン冷媒と共に用いられる冷凍機油。 - 前記フェノール系酸化防止剤が2,6-ジ-tert.-ブチル-p-クレゾールを含有する、請求項1に記載の冷凍機油。
- 請求項1又は2に記載の冷凍機油と、トリフルオロエチレン冷媒と、を含有する冷凍機用作動流体組成物。
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| US15/521,653 US10047315B2 (en) | 2014-11-18 | 2015-11-11 | Refrigeration oil and working fluid composition for refrigeration oil |
| CN201580062412.0A CN107001970B (zh) | 2014-11-18 | 2015-11-11 | 冷冻机油和冷冻机用工作流体组合物 |
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| WO2016056392A1 (ja) * | 2014-10-09 | 2016-04-14 | Jx日鉱日石エネルギー株式会社 | 冷凍機油及び冷凍機用作動流体組成物 |
| JP2017075278A (ja) * | 2015-10-16 | 2017-04-20 | 出光興産株式会社 | 冷凍機油、冷凍機用組成物、及び冷凍機 |
| US11001779B2 (en) | 2016-09-15 | 2021-05-11 | Eneos Corporation | Refrigerator oil and refrigerator working fluid composition |
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| JPWO2018142564A1 (ja) * | 2017-02-03 | 2019-11-07 | 三菱電機株式会社 | 圧縮機 |
| JP7653756B2 (ja) * | 2017-12-08 | 2025-03-31 | Eneos株式会社 | 冷凍機油及び冷凍機用作動流体組成物 |
| US11453839B2 (en) | 2018-08-28 | 2022-09-27 | Eneos Corporation | Refrigerator oil |
| JP7252537B2 (ja) * | 2018-12-05 | 2023-04-05 | 国立大学法人 東京大学 | 冷凍機用作動流体組成物の耐燃焼性を向上させる方法 |
| CN110951523A (zh) * | 2019-11-26 | 2020-04-03 | 广州市骏辉环保科技有限公司 | 一种合成冷冻机油及其制备方法和应用 |
| US12091629B2 (en) | 2020-04-02 | 2024-09-17 | Eneos Corporation | Refrigerator oil, and working fluid composition for refrigerator |
| CN111676088A (zh) * | 2020-07-23 | 2020-09-18 | 上海中孚特种油品有限公司 | 一种环保型合成冷冻机油及其制备方法 |
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| US20170240834A1 (en) | 2017-08-24 |
| TW201623596A (zh) | 2016-07-01 |
| KR20170084217A (ko) | 2017-07-19 |
| CN107001970B (zh) | 2020-08-28 |
| TWI609956B (zh) | 2018-01-01 |
| CN107001970A (zh) | 2017-08-01 |
| US10047315B2 (en) | 2018-08-14 |
| KR102471295B1 (ko) | 2022-11-29 |
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