WO2012026215A1 - ネオペンチルグリコールのジエステル - Google Patents
ネオペンチルグリコールのジエステル Download PDFInfo
- Publication number
- WO2012026215A1 WO2012026215A1 PCT/JP2011/065110 JP2011065110W WO2012026215A1 WO 2012026215 A1 WO2012026215 A1 WO 2012026215A1 JP 2011065110 W JP2011065110 W JP 2011065110W WO 2012026215 A1 WO2012026215 A1 WO 2012026215A1
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- WO
- WIPO (PCT)
- Prior art keywords
- acid
- diester
- neopentyl glycol
- isobutyric
- trimethylhexanoic
- Prior art date
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Classifications
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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
- C10M129/68—Esters
- C10M129/70—Esters of monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/22—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety
- C07C69/28—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety esterified with dihydroxylic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/22—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety
- C07C69/30—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety esterified with trihydroxylic 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
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/38—Esters of polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
-
- 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
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
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- 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
-
- 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
-
- 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
- C10N2030/10—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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/70—Soluble oils
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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
- C10N2040/02—Bearings
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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
- C10N2040/25—Internal-combustion engines
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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 diester of neopentyl glycol used for industrial lubricating oil such as refrigerator oil.
- HFCs hydrofluorocarbons
- GWP global warming potential
- Difluoromethane refrigerant (HFC-32) is a refrigerant currently used by GWP [R-410A (mixture of difluoromethane and pentafluoroethane), R-407C (difluoromethane and pentafluoroethane and 1,1,1 , 2-tetrafluoroethane, etc.), etc.] and a coefficient of performance (COP) is improved by about 5 to 13% compared to R-410A, R-407C, etc. It is a preferable refrigerant from the viewpoint of energy saving (Non-Patent Document 1).
- Patent Document 1 discloses a diester of neopentyl glycol and 3,5,5-trimethylhexanoic acid as an ester used in a composition for a refrigerator working fluid containing a difluoromethane refrigerant. The compatibility of diester with difluoromethane refrigerant is not sufficient.
- An object of the present invention is to provide a neopentylglycol diester used for refrigerating machine oil or the like having excellent compatibility with a difluoromethane refrigerant.
- the present invention provides neopentyl glycol diesters described in the following [1] to [4].
- neopentyl glycol diester used for refrigerating machine oil or the like having excellent compatibility with a difluoromethane refrigerant.
- diester of neopentyl glycol of the present invention is a mixed ester of neopentyl glycol and carboxylic acid, and the carboxylic acid includes isobutyric acid and 2-ethylhexanoic acid. And / or 3,5,5-trimethylhexanoic acid.
- Molar ratio of isobutyric acid to 2-ethylhexanoic acid and / or 3,5,5-trimethylhexanoic acid in the carboxylic acid is preferably in the range of 10/90 to 75/25, and more preferably in the range of 26/74 to 75/25.
- the “mixed ester” in the present invention includes the following (i) to (iii): (I)
- the constituent carboxylic acid in the same molecule contains a diester of neopentyl glycol containing both isobutyric acid and 2-ethylhexanoic acid or 3,5,5-trimethylhexanoic acid (ii) neopentyl glycol and isobutyric acid Mixtures of diesters with carboxylic acids and diesters of neopentyl glycol and carboxylic acids containing 2-ethylhexanoic acid and / or diesters of neopentyl glycol and carboxylic acids containing 3,5,5-trimethylhexanoic acid (Iii) Each embodiment of the mixture of (i) and (ii) above is included.
- the neopentyl glycol diester of the present invention may contain neopentyl glycol monoester as an impurity.
- the carboxylic acid constituting the diester contains isobutyric acid and 2-ethylhexanoic acid
- the carboxylic acid may contain other carboxylic acids other than isobutyric acid and 2-ethylhexanoic acid.
- examples of other carboxylic acids include linear chains such as acetic acid, propionic acid, butyric acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, and octadecanoic acid.
- Aliphatic carboxylic acid 2-methylbutyric acid, 3-methylbutyric acid, 2,2, -dimethylpropanoic acid, 2-ethylbutyric acid, 2-methylpentanoic acid, 4-methylpentanoic acid, 2-methylhexanoic acid, 2-ethyl Pentanoic acid, 2-ethyl-2-methylbutyric acid, 2,2-dimethylpentanoic acid, 2-methylheptanoic acid, 3-ethylhexanoic acid, 2-ethyl-2-methylpentanoic acid, 3,5,5-trimethylhexane Branched aliphatic carboxylic acids such as acid, 2-methyloctanoic acid, 2,2-dimethylheptanoic acid, isotridecanoic acid, isostearic acid, etc. It is below.
- the carboxylic acid constituting the diester contains isobutyric acid and 3,5,5-trimethylhexanoic acid
- the carboxylic acid includes isobutyric acid and other carboxylic acids other than 3,5,5-trimethylhexanoic acid. It may be.
- other carboxylic acids include linear chains such as acetic acid, propionic acid, butyric acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, and octadecanoic acid.
- Aliphatic carboxylic acid 2-methylbutyric acid, 3-methylbutyric acid, 2,2, -dimethylpropanoic acid, 2-ethylbutyric acid, 2-methylpentanoic acid, 4-methylpentanoic acid, 2-methylhexanoic acid, 2-ethyl Pentanoic acid, 2-ethyl-2-methylbutyric acid, 2,2-dimethylpentanoic acid, 2-methylheptanoic acid, 2-ethylhexanoic acid, 3-ethylhexanoic acid, 2-ethyl-2-methylpentanoic acid, 2- Examples thereof include branched aliphatic carboxylic acids such as methyloctanoic acid, 2,2-dimethylheptanoic acid, isotridecanoic acid and isostearic acid.
- the content of other carboxylic acids in the carboxylic acid containing isobutyric acid and 2-ethylhexanoic acid or 3,5,5-trimethylhexanoic acid is such that the diester of neopentyl glycol of the present invention is compatible with difluoromethane refrigerant, etc. As long as the excellent characteristics are not impaired.
- the molar ratio of isobutyric acid and 2-ethylhexanoic acid and / or 3,5,5-trimethylhexanoic acid to other carboxylic acids is preferably in the range of 0/100 to 5/100.
- the carboxylic acid constituting the neopentyl glycol diester of the present invention is more preferably composed of isobutyric acid and 2-ethylhexanoic acid and / or 3,5,5-trimethylhexanoic acid.
- the diester of neopentyl glycol of the present invention includes, for example, neopentyl glycol, isobutyric acid, 2-ethylhexanoic acid or 3,5,5-trimethylhexanoic acid, and optionally other carboxylic acid, in the presence of a catalyst. Then, it can be produced by reacting at 120 to 250 ° C. for 5 to 60 hours.
- Examples of the catalyst include mineral acids, organic acids, Lewis acids, organic metals, solid acids and the like.
- Specific examples of the mineral acid include hydrochloric acid, hydrofluoric acid, sulfuric acid, phosphoric acid, nitric acid and the like.
- Specific examples of the organic acid include p-toluenesulfonic acid, benzenesulfonic acid, butanesulfonic acid, propanesulfonic acid, ethanesulfonic acid, methanesulfonic acid and the like.
- Specific examples of the Lewis acid include boron trifluoride, aluminum chloride, tin tetrachloride, titanium tetrachloride and the like.
- Specific examples of the organic metal include tetrapropoxy titanium, tetrabutoxy titanium, tetrakis (2-ethylhexyloxy) titanium, and the like.
- Specific examples of the solid acid include a cation exchange resin.
- the sum of the amount of isobutyric acid used, the amount of 2-ethylhexanoic acid and / or 3,5,5-trimethylhexanoic acid and the amount of other carboxylic acids used is based on the hydroxyl group of neopentyl glycol used.
- the amount is preferably 1.1 to 1.4 times mol.
- a solvent may be used, and examples of the solvent include benzene, toluene, xylene and the like.
- the neopentyl glycol diester of the present invention is usually used in organic synthetic chemistry (washing with water and / or alkaline aqueous solution, treatment with activated carbon, adsorbent, etc., various chromatographic methods, You may refine
- the neopentyl glycol diester of the present invention has excellent compatibility with difluoromethane refrigerant, excellent oxidation stability, excellent hydrolysis resistance, excellent thermal stability, excellent low-temperature fluidity, excellent lubricity, etc. Have.
- the kinematic viscosity at 40 ° C. of the diester is in the range of 3 to 11 mm 2 / sec, and the two-layer separation temperature is ⁇ 39 ° C. or less.
- the diester has a kinematic viscosity at 40 ° C. in the range of 3 to 9 mm 2 / sec, and a two-layer separation temperature of ⁇ 43 ° C. or lower.
- neopentyl glycol diester of the present invention can be used not only for refrigerating machine oil but also for engine oil, gear oil, grease, plasticizer and the like.
- Examples of the refrigerating machine oil using the neopentyl glycol diester of the present invention include a refrigerating machine oil containing the neopentyl glycol diester of the present invention and an additive for lubricating oil.
- the diester is used as a lubricating oil base oil.
- lubricant additives examples include antioxidants, wear reducers (antiwear agents, anti-seizure agents, extreme pressure agents, etc.), friction modifiers, acid scavengers, metal deactivators, and antifoaming agents. And the like which are usually used as lubricating oil additives.
- the content of these additives is preferably 0.001 to 5% by weight in the refrigerating machine oil, respectively.
- neopentyl glycol diester of the present invention may be used in combination with other lubricating base oils.
- other lubricating base oils include mineral oils and synthetic base oils.
- mineral oil examples include paraffin-based crude oil, intermediate-based crude oil, and naphthenic-based crude oil.
- refined oils obtained by refining them by distillation or the like can also be used.
- Synthetic base oils include, for example, poly- ⁇ -olefins (polybutene, polypropylene, ⁇ -olefin oligomers having 8 to 14 carbon atoms, etc.), and aliphatic esters (fatty acid monoesters, polyesters) other than the diester of neopentyl glycol of the present invention.
- Example 1 Neopentyl glycol diester (diester 1) having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5-trimethylhexanoic acid ratio) of 12/88 )Manufacturing of]
- Kyoward 500 manufactured by Kyowa Chemical Industry Co., Ltd. was used.
- activated carbon Shirahige P manufactured by Nippon Enviro Chemicals was used.
- reaction product was stirred at 180 ° C. under a reduced pressure of 2.4 kPa for 5 hours to distill off unreacted carboxylic acid in the reaction product.
- the reaction product was washed with an alkaline aqueous solution (500 mL) containing sodium hydroxide twice as much as the acid value of the reaction product at 80 ° C. for 1 hour.
- the reaction product was then washed 3 times with 500 mL of water at 80 ° C. for 30 minutes. Subsequently, the reaction product was dried by stirring at 90 ° C.
- Example 2 Diester of neopentyl glycol having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (ratio of isobutyric acid / 3,5,5-trimethylhexanoic acid) of 17/83 (diester 2 )Manufacturing of]
- the molar ratio of neopentyl glycol, isobutyric acid and 3,5,5-trimethylhexanoic acid to be used is 1 / 0.72 / 1.
- the diester 2 was obtained in the same manner as in Example 1 except that it was changed to 68.
- Example 3 Diester of neopentyl glycol (diester 3) having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5-trimethylhexanoic acid ratio) of 23/77 )Manufacturing of]
- the molar ratio of neopentyl glycol, isobutyric acid and 3,5,5-trimethylhexanoic acid used is 1 / 0.84 / 1.
- the diester 3 was obtained in the same manner as in Example 1 except that it was changed to 56.
- Example 4 Diester of neopentyl glycol (diester 4) having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5-trimethylhexanoic acid ratio) of 26/74 )Manufacturing of]
- the molar ratio of neopentyl glycol, isobutyric acid and 3,5,5-trimethylhexanoic acid used is 1 / 0.96 / 1.
- the diester 4 was obtained in the same manner as in Example 1 except that it was changed to 44.
- Example 5 Diester of neopentyl glycol (diester 5) having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5-trimethylhexanoic acid ratio) of 38/62 )Manufacturing of]
- the molar ratio of neopentyl glycol, isobutyric acid and 3,5,5-trimethylhexanoic acid used was set to 1 / 1.20 / 1.
- the diester 5 was obtained in the same manner as in Example 1 except that the amount was 20.
- Example 6 Neopentyl glycol diester (diester 6) having a molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid (isobutyric acid / 3,5,5-trimethylhexanoic acid ratio) of 74/26 )Manufacturing of]
- the molar ratio of neopentyl glycol, isobutyric acid and 3,5,5-trimethylhexanoic acid used was set to 1 / 2.16 / 0.
- the diester 6 was obtained in the same manner as in Example 1 except that the amount was 24.
- Example 7 Production of neopentyl glycol diester (diester 7) having a molar ratio of isobutyric acid to 2-ethylhexanoic acid (ratio of isobutyric acid / 2-ethylhexanoic acid) of 27/73]
- 2-ethylhexanoic acid manufactured by Kyowa Hakko Chemical Co., Ltd.
- the molar ratio of neopentyl glycol, isobutyric acid and 2-ethylhexanoic acid used was obtained in the same manner as in Example 1 except that the ratio of isobutyric acid / 2-ethylhexanoic acid was changed to 1 / 0.72 / 1.68.
- Example 8 Production of a diester of dipentyl glycol (diester 8) having a molar ratio of isobutyric acid to 2-ethylhexanoic acid (ratio of isobutyric acid / 2-ethylhexanoic acid) of 46/54] Instead of 3,5,5-trimethylhexanoic acid, 2-ethylhexanoic acid (manufactured by Kyowa Hakko Chemical Co., Ltd.) was used, and the molar ratio of neopentyl glycol, isobutyric acid and 2-ethylhexanoic acid used (neopentyl glycol / Diester 8 was obtained in the same manner as in Example 1 except that the ratio of isobutyric acid / 2-ethylhexanoic acid was changed to 1 / 1.20 / 1.20.
- Example 9 Production of a diester of dipentyl glycol (diester 9) having a molar ratio of isobutyric acid to 2-ethylhexanoic acid (ratio of isobutyric acid / 2-ethylhexanoic acid) of 72/28] Instead of 3,5,5-trimethylhexanoic acid, 2-ethylhexanoic acid (manufactured by Kyowa Hakko Chemical Co., Ltd.) was used, and the molar ratio of neopentyl glycol, isobutyric acid and 2-ethylhexanoic acid used (neopentyl glycol / Diester 9 was obtained in the same manner as in Example 1 except that (isobutyric acid / 2-ethylhexanoic acid ratio) was changed to 1 / 1.92 / 0.48.
- diesters 1 to 6 have a kinematic viscosity at 40 ° C. of 3.9 to 10.7 mm 2 / sec and a two-layer separation temperature of ⁇ 39 ° C. or less, and have excellent compatibility with difluoromethane refrigerant.
- diesters 4 to 6 have a kinematic viscosity at 40 ° C. of 3.9 to 8.6 mm 2 / sec and a two-layer separation temperature of ⁇ 48 ° C. or less, and have particularly excellent compatibility with difluoromethane refrigerant.
- diesters 7 to 9 have a kinematic viscosity at 40 ° C. of 3.4 to 5.7 mm 2 / sec and a two-layer separation temperature of ⁇ 43 ° C. or less, and have excellent compatibility with difluoromethane refrigerant. I understand that.
- neopentyl glycol diester used for refrigerating machine oil or the like having excellent compatibility with a difluoromethane refrigerant.
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Abstract
Description
[1]ネオペンチルグリコールとカルボン酸とのエステルであり、前記カルボン酸が、イソ酪酸と、2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸とを含有するネオペンチルグリコールのジエステル。
[2]前記カルボン酸における2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸に対するイソ酪酸のモル比[イソ酪酸/(2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸)比]が10/90~75/25の範囲にある[1]に記載のネオペンチルグリコールのジエステル。
[3]前記カルボン酸における2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸に対するイソ酪酸のモル比[イソ酪酸/(2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸)比]が26/74~75/25の範囲にある[1]または[2]に記載のネオペンチルグリコールのジエステル。
[4]前記カルボン酸がイソ酪酸と2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸とからなる[1]~[3]のいずれかに記載のネオペンチルグリコールのジエステル。
(i)同一分子における構成カルボン酸がイソ酪酸と、2-エチルヘキサン酸または3,5,5-トリメチルヘキサン酸の双方を含むネオペンチルグリコールのジエステル
(ii)ネオペンチルグリコールとイソ酪酸を含有するカルボン酸とのジエステルと、ネオペンチルグリコールと2-エチルヘキサン酸を含有するカルボン酸とのジエステルおよび/またはネオペンチルグリコールと3,5,5-トリメチルヘキサン酸を含有するカルボン酸とのジエステルの混合物
(iii)上記(i)および(ii)の混合物
の各態様が包含される。
また、本発明のネオペンチルグリコールのジエステル中にネオペンチルグリコールのモノエステル等が不純物として含まれていてもよい。
イソ酪酸/2-エチルヘキサン酸
=ピークXの積分値/ピークYの積分値
イソ酪酸/3,5,5-トリメチルヘキサン酸
=ピークXの積分値/ピークZの積分値
ここで、ピークXはイソ酪酸におけるメチン基上の水素原子のピークに相当し、ピークYは2-エチルヘキサン酸におけるメチン基上の水素原子のピークに相当し、ピークZは3,5,5-トリメチルヘキサン酸におけるメチン基上の水素原子のピークに相当する。
吸着剤としては、協和化学工業社製キョーワード500を用いた。
活性炭としては、日本エンバイロケミカルズ社製白鷺Pを用いた。
ディーンスタークトラップの付いた反応器にネオペンチルグリコール417g(4.0モル、三菱瓦斯化学社製)、イソ酪酸211g(2.4モル、東京化成社製)および3,5,5-トリメチルヘキサン酸1139g(7.2モル、協和発酵ケミカル社製)を仕込み、混合物を攪拌しながら室温で30分間窒素バブリングを行うことにより混合物を脱気した。
次いで、窒素バブリングを行いながら混合物を150~220℃で12時間攪拌し、次いで、反応混合物にテトラブトキシチタン0.2gを添加し、次いで、反応混合物を220℃で3時間攪拌した。反応後、反応生成物を2.4kPaの減圧下、180℃で5時間攪拌することにより、反応生成物中の未反応のカルボン酸を留去した。反応生成物を、該反応生成物の酸価に対して2倍モルの水酸化ナトリウムを含むアルカリ水溶液500mLで、80℃で1時間洗浄した。次いで、反応生成物を、水500mLで80℃で30分間、3回洗浄した。次いで、窒素バブリングを行いながら反応生成物を1.3kPaの減圧下、90℃で1時間攪拌することにより反応生成物を乾燥した。
反応生成物に吸着剤10g(反応生成物の1重量%に相当する)および活性炭10g(反応生成物の1重量%に相当する)を添加し、窒素バブリングを行いながら反応生成物を1.3kPaの減圧下、90℃で1時間攪拌した後、濾過助剤を用いて濾過することにより、ジエステル1を1091g得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/0.72/1.68にする以外は、実施例1と同様に操作して、ジエステル2を得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/0.84/1.56にする以外は、実施例1と同様に操作して、ジエステル3を得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/0.96/1.44にする以外は、実施例1と同様に操作して、ジエステル4を得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/1.20/1.20にする以外は、実施例1と同様に操作して、ジエステル5を得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/2.16/0.24にする以外は、実施例1と同様に操作して、ジエステル6を得た。
3,5,5-トリメチルヘキサン酸の代わりに2-エチルヘキサン酸(協和発酵ケミカル社製)を用い、ネオペンチルグリコール、イソ酪酸および2-エチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/2-エチルヘキサン酸比)を1/0.72/1.68にする以外は、実施例1と同様に操作して、ジエステル7を得た。
3,5,5-トリメチルヘキサン酸の代わりに2-エチルヘキサン酸(協和発酵ケミカル社製)を用い、ネオペンチルグリコール、イソ酪酸および2-エチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/2-エチルヘキサン酸比)を1/1.20/1.20にする以外は、実施例1と同様に操作して、ジエステル8を得た。
3,5,5-トリメチルヘキサン酸の代わりに2-エチルヘキサン酸(協和発酵ケミカル社製)を用い、ネオペンチルグリコール、イソ酪酸および2-エチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/2-エチルヘキサン酸比)を1/1.92/0.48にする以外は、実施例1と同様に操作して、ジエステル9を得た。
ネオペンチルグリコール、イソ酪酸および3,5,5-トリメチルヘキサン酸の使用量のモル比(ネオペンチルグリコール/イソ酪酸/3,5,5-トリメチルヘキサン酸比)を1/0/2.4にする以外は、実施例1と同様に操作して、ジエステルAを得た。
キャノン-フェンスケ粘度計を用い、JIS K2283:2000の方法に準じてジエステル1~9およびAの40℃における動粘度を測定した。結果を表1および表2に示す。
JIS K2211:2009の方法に準じてジエステル1~9およびAの二層分離温度を測定した。ジエステル1~9およびAのそれぞれ0.4gとジフルオロメタン冷媒3.6gを耐圧ガラス管に封入し、混合物を30℃から毎分0.5℃の速度で冷却し、混合物が二層分離または白濁する温度を二層分離温度とした。結果を表1および表2に示す。
表2より、ジエステル7~9は、40℃における動粘度が3.4~5.7mm2/秒であって、二層分離温度が-43℃以下とジフルオロメタン冷媒に対する優れた相溶性を有することがわかる。
回転ボンベ式酸化安定度試験器RBOT-02(離合社製)を用い、JIS K2514-1996の方法に準じて酸化安定度試験を行った。
ジエステル6の49.75gと、4,4’-メチレンビス(2,6-ジ-tert-ブチルフェノール)0.25gと、水5mLと、紙やすりで磨いた電解銅線(直径1.6mm、長さ3m)を耐圧容器に入れた。次いで、該耐圧容器に酸素を620kPaまで圧入し、該耐圧容器を150℃の恒温槽に入れ、毎分100回転で回転させた。該耐圧容器の圧力が最高になったときから175kPaの圧力降下をするまでの時間は、118分間であった。このことから、ジエステル6は、優れた酸化安定性を有することがわかる。
Claims (4)
- ネオペンチルグリコールとカルボン酸とのエステルであり、前記カルボン酸が、イソ酪酸と、2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸とを含有するネオペンチルグリコールのジエステル。
- 前記カルボン酸における2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸に対するイソ酪酸のモル比[イソ酪酸/(2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸)比]が10/90~75/25の範囲にある請求項1に記載のネオペンチルグリコールのジエステル。
- 前記カルボン酸における2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸に対するイソ酪酸のモル比[イソ酪酸/(2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸)比]が26/74~75/25の範囲にある請求項1または2に記載のネオペンチルグリコールのジエステル。
- 前記カルボン酸がイソ酪酸と2-エチルヘキサン酸および/または3,5,5-トリメチルヘキサン酸とからなる請求項1~3のいずれかに記載のネオペンチルグリコールのジエステル。
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KR1020137003776A KR101659648B1 (ko) | 2010-08-24 | 2011-06-30 | 네오펜틸글리콜의 디에스테르 |
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JP2013227255A (ja) * | 2012-04-26 | 2013-11-07 | Nof Corp | 冷凍機油用エステルおよびその製造方法 |
JP2016188356A (ja) * | 2015-03-27 | 2016-11-04 | パテック ファイン ケミカルズ カンパニー リミテッドPatech Fine Chemicals Co.,Ltd. | 新規な冷凍機油 |
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CN104768915B (zh) * | 2012-10-24 | 2016-05-04 | Kh新化株式会社 | 双季戊四醇单缩甲醛的六酯 |
JP6048810B2 (ja) * | 2012-11-13 | 2016-12-21 | 日油株式会社 | エステルの製造方法 |
GB201502874D0 (en) * | 2015-02-20 | 2015-04-08 | M & I Materials Ltd | Low temperature dielectric fluid compositions |
US10604720B2 (en) * | 2015-07-07 | 2020-03-31 | Exxonmobil Research And Engineering Company | Method and composition for preventing or reducing engine knock and pre-ignition in high compression spark ignition engines |
WO2018118477A1 (en) * | 2016-12-19 | 2018-06-28 | Exxonmobil Research And Engineering Company | Composition and method for preventing or reducing engine knock and pre-ignition compression spark ignition engines |
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KR100288029B1 (ko) | 1998-01-21 | 2001-04-16 | 다니구찌 이찌로오, 기타오카 다카시 | HFC-32, HFC-125 또는 HFC-134a를 사용하는 냉동기용 윤활유 조성물 |
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JPH0617073A (ja) * | 1992-07-04 | 1994-01-25 | Kao Corp | 冷凍機作動流体用組成物 |
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JP2013227255A (ja) * | 2012-04-26 | 2013-11-07 | Nof Corp | 冷凍機油用エステルおよびその製造方法 |
JP2016188356A (ja) * | 2015-03-27 | 2016-11-04 | パテック ファイン ケミカルズ カンパニー リミテッドPatech Fine Chemicals Co.,Ltd. | 新規な冷凍機油 |
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KR101659648B1 (ko) | 2016-09-26 |
US20130231498A1 (en) | 2013-09-05 |
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US8772531B2 (en) | 2014-07-08 |
CN102958901B (zh) | 2015-02-18 |
TWI409327B (zh) | 2013-09-21 |
CN102958901A (zh) | 2013-03-06 |
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