US20050130850A1 - Dibasic acid diesters - Google Patents
Dibasic acid diesters Download PDFInfo
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- US20050130850A1 US20050130850A1 US10/491,238 US49123804A US2005130850A1 US 20050130850 A1 US20050130850 A1 US 20050130850A1 US 49123804 A US49123804 A US 49123804A US 2005130850 A1 US2005130850 A1 US 2005130850A1
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- dibasic acid
- oil
- acid
- carbon atoms
- lubricating
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- 0 [1*]OOCC([2*])([H])C([H])([H])C([3*])([H])C(=O)O[4*] Chemical compound [1*]OOCC([2*])([H])C([H])([H])C([3*])([H])C(=O)O[4*] 0.000 description 3
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/34—Esters of acyclic saturated polycarboxylic acids having an esterified carboxyl group bound to an acyclic carbon atom
-
- 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
- C10M105/36—Esters of polycarboxylic acids
-
- 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
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
- C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/285—Esters of aromatic polycarboxylic acids
- C10M2207/2855—Esters of aromatic polycarboxylic acids used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
- C10M2207/345—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives 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
- 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
- C10N2020/081—Biodegradable 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/64—Environmental friendly compositions
-
- 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
- C10N2030/66—Hydrolytic stability
Definitions
- the present invention relates to dibasic acid diesters suitable for use in lubricating base oils, etc.
- the base oils for lubricating oils or grease include those comprising dibasic acid diesters.
- WO97/21792 discloses a lubricating oil whose base oil is an alicyclic polycarboxylic acid ester
- Japanese Published Unexamined Patent Application No. 2001-89776 discloses a lubricating oil for a freezer whose base oil is 1,2-cyclohexanedicarboxylic acid diester.
- neither of the above lubricating oils whose base oil is a polycarboxylic acid diester is practically satisfactory in respect of hydrolysis resistance.
- An object of the present invention is to provide dibasic acid diesters, which are suitable for use in lubricating base oils, etc. and excellent in hydrolysis resistance, etc.
- the present invention provides the following (1) to (4).
- dibasic acid diesters represented by general formula (I) may be referred to as Compounds (I).
- the lower alkyl includes straight-chain or branched alkyl groups having 1 to 8 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isoamyl, neopentyl, hexyl, heptyl, octyl, isooctyl and 2-ethylhexyl.
- alkyl having 1 to 4 carbon atoms is preferred, and ethyl is more preferred.
- the alkyl having 7 or more carbon atoms includes straight-chain or branched ones such as heptyl, octyl, 2-octyl, 3-octyl, isooctyl, 2-ethylhexyl, 4-methyl-3-heptyl, 2-propyl-1-pentyl, 2,4,4-trimethyl-1-pentyl, 2,2-dimethyl-3-hexyl, 2,3-dimethyl-2-hexyl, 2,5-dimethyl-2-hexyl, 2,5-dimethyl-3-hexyl, 3,4-dimethyl-3-hexyl, 3,5-dimethyl-3-hexyl, 3-ethyl-2-methyl-3-pentyl, 2-methyl-2-heptyl, 3-methyl-3-heptyl, 4-methyl-4-heptyl, 5-methyl-1-heptyl, 5-methyl-2-heptyl, 5-methyl-3-heptyl, 6-methyl-2-heptyl
- R 1 and R 4 are preferably alkyl having 7 to 40 carbon atoms, more preferably alkyl having 7 to 30 carbon atoms, further preferably alkyl having 7 to 25 carbon atoms, and particularly preferably alkyl having 7 to 20 carbon atoms.
- Compounds (I) can be produced by known methods for synthesis of esters.
- Compound (I) can be obtained by reacting the corresponding dibasic acid with 1 to 10 equivalents, preferably 1 to 2 equivalents of an aliphatic alcohol, if necessary, in the presence of an entrainer and a catalytic amount to 0.5 equivalent of an acid catalyst such as p-toluenesulfonic acid at 50 to 180° C.
- an entrainers include toluene and benzene. They are usually used in an amount of 0.5 to 100 equivalents on the basis of dibasic acid.
- a dibasic acid used as a starting material can be produced by treating the corresponding diol in the presence of 1 to 5 equivalents of a base such as sodium hydroxide or potassium hydroxide, preferably at 200 to 320° C. according to known methods [Yukagaku (Oil Chenistry), Vol. 19, No. 12, p. 1087 (1970); Japanese Published Unexamined Patent Application No. 72948/94; etc.].
- a reaction solvent such as an ether solvent (e.g., dibenzyl ether) or a hydrocarbon solvent (e.g., liquid paraffin having 10 to 16 carbon atoms) may be used.
- the lubricating base oil of the present invention preferably contains Compound (I) in an amount of 10 wt % or more, more preferably 25 wt % or more, further preferably. 50 wt % or more on the basis of the total amount.
- the lubricating base oil of the present invention may contain additional base oils such as ester oils, poly- ⁇ -olefin, mineral oils and silicone oils as may be required.
- ester oils are fatty acid monoesters, adipic acid diesters, azelaic acid diesters, sebacic acid diesters and phthalic acid diesters.
- poly- ⁇ -olefin examples include low molecular weight polybutene, low molecular weight polypropylene and ⁇ -olefin oligomers having 8 to 14 carbon atoms.
- mineral oils examples include paraffin-base crude oil, intermediate base crude oil and naphthene-base crude oil.
- the lubricating oil of the present invention can be obtained by adding to the lubricating base oil of the present invention, according to need, additives such as a detergent-dispersant, an antioxidant, an extreme-pressure additive, a rust inhibitor, a vapor phase rust inhibitor, a pour point depressant, a thickener, an antiseptic, an antifoaming agent, a demulsifier, an extreme-pressure additive, a dye and a perfume.
- additives such as a detergent-dispersant, an antioxidant, an extreme-pressure additive, a rust inhibitor, a vapor phase rust inhibitor, a pour point depressant, a thickener, an antiseptic, an antifoaming agent, a demulsifier, an extreme-pressure additive, a dye and a perfume.
- additives such as a detergent-dispersant, an antioxidant, an extreme-pressure additive, a rust inhibitor, a vapor phase rust inhibitor, a pour point depressant, a thickener,
- the lubricating base oil and the lubricating oil of the present invention are excellent in hydrolysis resistance, lubrication, heat resistance, low temperature fluidity, flame resistance, biodegradability, or the like.
- the lubricating oil of the present invention can be employed, for example, as engine oil, turbine oil, hydraulic oil, refrigerating oil, rolling oil, grease, lubricating oil for metal processing, etc. according to known methods (WO97/21792, Japanese Published Unexamined Patent Application No. 2001-89776, etc.).
- Hydrolysis resistance test was carried out using Compounds 1 and 2 respectively synthesized in Examples 1 and 2, and DOA (dioctyl adipate) as a comparative compound.
- Test method Into a test solution comprising a test sample and water (weight ratio: 3:1) were put a copper piece and an iron piece as catalysts, and the test solution was allowed to stand with stirring at 100° C. for 168 hours. The total acid number of the oil layer was measured after standing (the total acid number becomes larger as hydrolysis proceeds). The test results are shown in Table 1. TABLE 1 Total acid value (mgKOH/g) Compound 1 0.12 Compound 2 0.03 Comparative compound 0.26
- 2,4-Diethyl-1,5-pentanediol (160.3 g) (trade name: Kyowadiol PD-9, Kyowa Yuka Co., Ltd., purity: 93.9%), 156.6 g of potassium hydroxide (purity: 86%) and 102.2 g of carbon number 12 paraffin mixture (trade name: Kyowasol C1200-H, Kyowa Yuka Co., Ltd.) were placed in a 1L nickel autoclave equipped with a reflux condenser, a pressure control valve and an electric furnace capable of temperature control, and heated with stirring under 1 MPa. The generated hydrogen gas was measured with a gas meter, and the progress of reaction was monitored.
- the generation of the gas was confirmed at around 230° C., and the reaction was continued at a temperature maintained in the range of 250 to 270° C. After the temperature reached 250° C., 89.4 l of hydrogen was generated in 3.5 hours. The reaction was continued for further 30 minutes, during which 0.8 l of hydrogen gas was generated. The amount of the generated hydrogen agreed with the theoretical value and the rate of reaction was 100%.
- the reaction mixture containing dipotassium 2,4-diethylglutarate was dissolved in water, and sulfuric acid was added thereto. The deposited solid was separated therefrom by filtration to obtain crude 2,4-diethylglutaric acid.
- the obtained crude 2,4-diethylglutaric acid was washed with water and purified by crystallization from n-hexane, whereby 142.5 g of 2,4-diethylglutaric acid (white crystals) was obtained.
- the obtained 2,4-diethylglutaric acid had 98.3% purity (calculated from acid value) (yield: 79.1%).
- the present invention provides dibasic acid diesters, which are suitable for use in lubricating base oils, etc. and excellent in hydrolysis resistance, etc.
Abstract
The present invention provides dibasic acid diesters, which are suitable for use in lubricating base oils, etc. and excellent in hydrolysis resistance, etc., represented by general formula (I):
(wherein R2 and R3, which may be the same or different, each represent lower alkyl; and R1 and R4, which may be the same or different, each represent alkyl having 7 or more carbon atoms).
(wherein R2 and R3, which may be the same or different, each represent lower alkyl; and R1 and R4, which may be the same or different, each represent alkyl having 7 or more carbon atoms).
Description
- The present invention relates to dibasic acid diesters suitable for use in lubricating base oils, etc.
- As base oils for lubricating oils and grease, those having a high stability and a long life are desirable.
- Known examples of the base oils for lubricating oils or grease include those comprising dibasic acid diesters. As the lubricating oil whose base oil is a dibasic acid diester, WO97/21792 discloses a lubricating oil whose base oil is an alicyclic polycarboxylic acid ester, and Japanese Published Unexamined Patent Application No. 2001-89776 discloses a lubricating oil for a freezer whose base oil is 1,2-cyclohexanedicarboxylic acid diester. However, neither of the above lubricating oils whose base oil is a polycarboxylic acid diester is practically satisfactory in respect of hydrolysis resistance.
- An object of the present invention is to provide dibasic acid diesters, which are suitable for use in lubricating base oils, etc. and excellent in hydrolysis resistance, etc.
- The present invention provides the following (1) to (4).
-
- (1) A dibasic acid diester represented by general formula (I):
(wherein R2 and R3, which may be the same or different, each represent lower alkyl; and R1 and R4, which may be the same or different, each represent alkyl having 7 or more carbon atoms). - (2) The dibasic acid diester according to (1), wherein R1 and R4 each are alkyl having 7 to 40 carbon atoms.
- (3) A lubricating base oil comprising the dibasic acid diester according to (1) or (2).
- (4) A lubricating oil comprising the lubricating base oil according to (3).
- (1) A dibasic acid diester represented by general formula (I):
- Hereinafter, the dibasic acid diesters represented by general formula (I) may be referred to as Compounds (I).
- In the definitions of the groups in general formula (I), the lower alkyl includes straight-chain or branched alkyl groups having 1 to 8 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isoamyl, neopentyl, hexyl, heptyl, octyl, isooctyl and 2-ethylhexyl. As R2 and R3, alkyl having 1 to 4 carbon atoms is preferred, and ethyl is more preferred.
- The alkyl having 7 or more carbon atoms includes straight-chain or branched ones such as heptyl, octyl, 2-octyl, 3-octyl, isooctyl, 2-ethylhexyl, 4-methyl-3-heptyl, 2-propyl-1-pentyl, 2,4,4-trimethyl-1-pentyl, 2,2-dimethyl-3-hexyl, 2,3-dimethyl-2-hexyl, 2,5-dimethyl-2-hexyl, 2,5-dimethyl-3-hexyl, 3,4-dimethyl-3-hexyl, 3,5-dimethyl-3-hexyl, 3-ethyl-2-methyl-3-pentyl, 2-methyl-2-heptyl, 3-methyl-3-heptyl, 4-methyl-4-heptyl, 5-methyl-1-heptyl, 5-methyl-2-heptyl, 5-methyl-3-heptyl, 6-methyl-2-heptyl, 6-methyl-3-heptyl, nonyl, 2-nonyl, 3-nonyl, 4-nonyl, 5-nonyl, 2-methyl-3-octyl, 6-methyl-1-octyl, 3,5,5-trimethyl-1-hexyl, 2,6-dimethyl-4-heptyl, 3-ethyl-2,2-dimethyl-3-pentyl, decyl, 2-decyl, 3-decyl, 4-decyl, 5-decyl, 3,7-dimethyl-1-octyl, 3,7-dimethyl-3-octyl, undecyl, 2-undecyl, 3-undecyl, 4-undecyl, 5-undecyl, 6-undecyl, dodecyl, 2-dodecyl, 2-butyl-1-octyl, tridecyl, 2-tridecyl, tridecyl, tetradecyl, 2-tetradecyl, 7-tetradecyl, 7-ethyl-2-methyl-4-undecyl, pentadecyl, hexadecyl, 2-hexadecyl, 2-hexyl-1-decyl, heptadecyl, octadecyl (stearyl), isostearyl, 5,7,7-trimethyl-2-(1,3,3-trimethylbutyl)octyl, nonadecyl, eicosyl, docosyl, 2-octyl-1-dodecyl, triacontyl and tetracontyl. R1 and R4 are preferably alkyl having 7 to 40 carbon atoms, more preferably alkyl having 7 to 30 carbon atoms, further preferably alkyl having 7 to 25 carbon atoms, and particularly preferably alkyl having 7 to 20 carbon atoms.
- Compounds (I) can be produced by known methods for synthesis of esters. For example, Compound (I) can be obtained by reacting the corresponding dibasic acid with 1 to 10 equivalents, preferably 1 to 2 equivalents of an aliphatic alcohol, if necessary, in the presence of an entrainer and a catalytic amount to 0.5 equivalent of an acid catalyst such as p-toluenesulfonic acid at 50 to 180° C. Examples of the entrainers include toluene and benzene. They are usually used in an amount of 0.5 to 100 equivalents on the basis of dibasic acid.
- A dibasic acid used as a starting material can be produced by treating the corresponding diol in the presence of 1 to 5 equivalents of a base such as sodium hydroxide or potassium hydroxide, preferably at 200 to 320° C. according to known methods [Yukagaku (Oil Chenistry), Vol. 19, No. 12, p. 1087 (1970); Japanese Published Unexamined Patent Application No. 72948/94; etc.]. In this treatment, a reaction solvent such as an ether solvent (e.g., dibenzyl ether) or a hydrocarbon solvent (e.g., liquid paraffin having 10 to 16 carbon atoms) may be used.
- The lubricating base oil of the present invention preferably contains Compound (I) in an amount of 10 wt % or more, more preferably 25 wt % or more, further preferably. 50 wt % or more on the basis of the total amount.
- The lubricating base oil of the present invention may contain additional base oils such as ester oils, poly-α-olefin, mineral oils and silicone oils as may be required.
- Examples of the ester oils are fatty acid monoesters, adipic acid diesters, azelaic acid diesters, sebacic acid diesters and phthalic acid diesters.
- Examples of the poly-α-olefin are low molecular weight polybutene, low molecular weight polypropylene and α-olefin oligomers having 8 to 14 carbon atoms.
- Examples of the mineral oils are paraffin-base crude oil, intermediate base crude oil and naphthene-base crude oil.
- There is no specific restriction as to the amount of additional base oils such as ester oils, poly-α-olefin, mineral oils and silicone oils, but it is preferably 90 wt % or less, more preferably 50 wt % or less on the basis of Compound (I).
- The lubricating oil of the present invention can be obtained by adding to the lubricating base oil of the present invention, according to need, additives such as a detergent-dispersant, an antioxidant, an extreme-pressure additive, a rust inhibitor, a vapor phase rust inhibitor, a pour point depressant, a thickener, an antiseptic, an antifoaming agent, a demulsifier, an extreme-pressure additive, a dye and a perfume. There is no specific restriction as to the amount of these additives, but it is preferably 0.01 to 5 wt % of the lubricating oil of the present invention.
- The lubricating base oil and the lubricating oil of the present invention are excellent in hydrolysis resistance, lubrication, heat resistance, low temperature fluidity, flame resistance, biodegradability, or the like.
- The lubricating oil of the present invention can be employed, for example, as engine oil, turbine oil, hydraulic oil, refrigerating oil, rolling oil, grease, lubricating oil for metal processing, etc. according to known methods (WO97/21792, Japanese Published Unexamined Patent Application No. 2001-89776, etc.).
- Hydrolysis resistance test was carried out using Compounds 1 and 2 respectively synthesized in Examples 1 and 2, and DOA (dioctyl adipate) as a comparative compound. Test method: Into a test solution comprising a test sample and water (weight ratio: 3:1) were put a copper piece and an iron piece as catalysts, and the test solution was allowed to stand with stirring at 100° C. for 168 hours. The total acid number of the oil layer was measured after standing (the total acid number becomes larger as hydrolysis proceeds). The test results are shown in Table 1.
TABLE 1 Total acid value (mgKOH/g) Compound 1 0.12 Compound 2 0.03 Comparative compound 0.26 - It is evident from Table 1 that Compounds 1 and 2 are remarkably excellent in hydrolysis resistance, compared with the comparative compound.
- Measurement data in the following reference example and examples were obtained using the following measurement instruments.
-
- Mass spectrum (MS): M-80B mass spectrometer (Hitachi Co., Ltd.)
- Infrared spectrum (IR): FTS-40A (Bio-Rad Japan)
- Proton nuclear magnetic resonance spectrum (1H-NMR): GSX-400 (400 MHz) (JEOL Ltd.)
- Density: electronic densimeter SP-120L (Alfa Mirage Co., Ltd.)
- Kinematic viscosity: Cannon-Fenske viscometer (measured according to the method of JIS K2283)
- 2,4-Diethyl-1,5-pentanediol (160.3 g) (trade name: Kyowadiol PD-9, Kyowa Yuka Co., Ltd., purity: 93.9%), 156.6 g of potassium hydroxide (purity: 86%) and 102.2 g of carbon number 12 paraffin mixture (trade name: Kyowasol C1200-H, Kyowa Yuka Co., Ltd.) were placed in a 1L nickel autoclave equipped with a reflux condenser, a pressure control valve and an electric furnace capable of temperature control, and heated with stirring under 1 MPa. The generated hydrogen gas was measured with a gas meter, and the progress of reaction was monitored. The generation of the gas was confirmed at around 230° C., and the reaction was continued at a temperature maintained in the range of 250 to 270° C. After the temperature reached 250° C., 89.4 l of hydrogen was generated in 3.5 hours. The reaction was continued for further 30 minutes, during which 0.8 l of hydrogen gas was generated. The amount of the generated hydrogen agreed with the theoretical value and the rate of reaction was 100%. After the reaction, the reaction mixture containing dipotassium 2,4-diethylglutarate was dissolved in water, and sulfuric acid was added thereto. The deposited solid was separated therefrom by filtration to obtain crude 2,4-diethylglutaric acid. The obtained crude 2,4-diethylglutaric acid was washed with water and purified by crystallization from n-hexane, whereby 142.5 g of 2,4-diethylglutaric acid (white crystals) was obtained. The obtained 2,4-diethylglutaric acid had 98.3% purity (calculated from acid value) (yield: 79.1%).
- In a reaction flask were placed 2,4-diethylglutaric acid (92.50 g), 2-ethylhexanol (66.00 g) and toluene (157.3 g), and the mixture was stirred well and p-toluenesulfonic acid monohydrate (2.67 g) was added thereto, followed by reflux for 5 hours. After cooling to room temperature, the reaction mixture was neutralized with a 0.1 wt % aqueous solution of sodium hydroxide and then washed with water. The solvent was distilled away from the reaction mixture at 135° C. in vacuo, whereby 146 g of Compound 1 (yield: 98.4%) was obtained. The physical properties of Compound 1 were as follows.
-
- 1H-NMR (CDCl3, δ ppm): 3.98 (m, 4H), 2.32 (m, 2H), 1.94 (m, 1H), 1.75 (m, 1H), 1.59 (m, 4H), 1.28 (m, 18H), 0.95 (m, 18H)
- IR (cm−1): 2972, 2942, 2887 (C—H), 1745 (C═O), 1465, 1388, 1261, 1163 (C—O)
- MS (m/z): 414 (M+)
- Density (kg/m3): 929 (25° C.)
- Kinematic viscosity (cSt): 9.47 (40° C.), 2.53 (100° C.)
- In a reaction flask were placed 2,4-diethylglutaric acid (92.06 g), 5,7,7-trimethyl-2-(1,3,3-trimethylbutyl)octyl alcohol (28.32 g) and toluene (30.23 g), and the mixture was stirred well and p-toluenesulfonic acid monohydrate (1.13 g) was added thereto, followed by reflux for 4 hours. After cooling to room temperature, the reaction mixture was neutralized with a 0.2 wt % aqueous solution of sodium hydroxide and then washed with water. 5,7,7-Trimethyl-2-(1,3,3-trimethylbutyl)octyl alcohol was removed from the reaction mixture by extraction with methanol (three times), whereby 82.9 g of Compound 2 (yield: 79.0%) was obtained. The physical properties of Compound 2 were as follows.
-
- 1H-NMR (CDCl3, δ ppm): 4.01 (m, 4H), 2.32 (m, 2H), 1.96-1.04 (m, 28H), 0.88 (m, 54H)
- IR (cm−1): 2962, 2916, 2887 (C—H), 1743 (C═O), 1471, 1384, 1233, 1197, 1164 (C—O)
- Density (kg/m3): 879 (26° C.)
- Kinematic viscosity (cSt): 270 (40° C.), 14.3 (100° C.)
- The present invention provides dibasic acid diesters, which are suitable for use in lubricating base oils, etc. and excellent in hydrolysis resistance, etc.
Claims (4)
2. The dibasic acid diester according to claim 1 , wherein R1 and R4 each are alkyl having 7 to 40 carbon atoms.
3. A lubricating base oil comprising the dibasic acid diester according to claim 1 or 2.
4. A lubricating oil comprising the lubricating base oil according to claim 3.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2001-312099 | 2001-10-10 | ||
JP2001312099 | 2001-10-10 | ||
PCT/JP2002/010528 WO2003033451A1 (en) | 2001-10-10 | 2002-10-10 | Dibasic acid diester |
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US20050130850A1 true US20050130850A1 (en) | 2005-06-16 |
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Family Applications (1)
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US10/491,238 Abandoned US20050130850A1 (en) | 2001-10-10 | 2002-10-10 | Dibasic acid diesters |
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US (1) | US20050130850A1 (en) |
EP (1) | EP1449823A4 (en) |
JP (1) | JP4063766B2 (en) |
KR (1) | KR20050035128A (en) |
CN (1) | CN1241898C (en) |
WO (1) | WO2003033451A1 (en) |
Cited By (2)
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US20040219178A1 (en) * | 2001-08-21 | 2004-11-04 | Yukitoshi Fukuda | Oily ingredient for cosmetic preparation and cosmetic preparation |
US20120283161A1 (en) * | 2011-05-06 | 2012-11-08 | Samsung Electro-Mechanics Co., Ltd. | Lubricating oil composition |
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DE102004034202A1 (en) * | 2004-07-14 | 2005-11-10 | Sasol Germany Gmbh | Ester mixture obtained by esterification of dicarboxylic acid in presence of tri-/tetra-carboxylic acid with mono-hydroxy alcohol, useful as e.g. lubricant, hydraulic fluid, comprises alcohol, carbonic acids and dicarbonic acid |
JPWO2006059687A1 (en) * | 2004-12-01 | 2008-06-05 | 協和発酵ケミカル株式会社 | Bearing lubricant |
CN100480229C (en) * | 2006-12-13 | 2009-04-22 | 井冈山学院 | Preparation and application of tetraisopropyl carboxylate |
JP2008297501A (en) * | 2007-06-01 | 2008-12-11 | New Japan Chem Co Ltd | Lubricating oil for use in bearing |
WO2020129944A1 (en) * | 2018-12-20 | 2020-06-25 | 新日本理化株式会社 | Lubricating base oil for fluid dynamic bearing |
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US5773240A (en) * | 1994-06-13 | 1998-06-30 | Mitsubishi Rayon Co., Ltd. | Optically active α-substituted carboxylic acid derivatives and method for producing the same |
US5942474A (en) * | 1995-11-22 | 1999-08-24 | Exxon Chemical Patents Inc | Two-cycle ester based synthetic lubricating oil |
US20030087786A1 (en) * | 2001-07-13 | 2003-05-08 | Hei Robert Dale | High concentration monoester peroxy dicarboxylic acid compositions, use solutions, and methods employing them |
US20040219178A1 (en) * | 2001-08-21 | 2004-11-04 | Yukitoshi Fukuda | Oily ingredient for cosmetic preparation and cosmetic preparation |
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US3271315A (en) * | 1963-11-01 | 1966-09-06 | Continental Oil Co | Use of hindered esters of carboxylic acids as radiation resistant lubricants |
US3409553A (en) * | 1966-02-01 | 1968-11-05 | Eastman Kodak Co | Two-cycle engine lubricant and fuel |
JPS5940817B2 (en) * | 1976-04-30 | 1984-10-03 | 全国石油工業協同組合 | Dicarboxylic acid ester and its manufacturing method |
JP3962962B2 (en) * | 1997-09-22 | 2007-08-22 | ソニー株式会社 | Magnetic recording medium |
-
2002
- 2002-10-10 KR KR1020047005216A patent/KR20050035128A/en not_active Application Discontinuation
- 2002-10-10 WO PCT/JP2002/010528 patent/WO2003033451A1/en not_active Application Discontinuation
- 2002-10-10 JP JP2003536193A patent/JP4063766B2/en not_active Expired - Fee Related
- 2002-10-10 EP EP02801528A patent/EP1449823A4/en not_active Withdrawn
- 2002-10-10 CN CNB028199367A patent/CN1241898C/en not_active Expired - Fee Related
- 2002-10-10 US US10/491,238 patent/US20050130850A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US5773240A (en) * | 1994-06-13 | 1998-06-30 | Mitsubishi Rayon Co., Ltd. | Optically active α-substituted carboxylic acid derivatives and method for producing the same |
US5942474A (en) * | 1995-11-22 | 1999-08-24 | Exxon Chemical Patents Inc | Two-cycle ester based synthetic lubricating oil |
US20030087786A1 (en) * | 2001-07-13 | 2003-05-08 | Hei Robert Dale | High concentration monoester peroxy dicarboxylic acid compositions, use solutions, and methods employing them |
US20040219178A1 (en) * | 2001-08-21 | 2004-11-04 | Yukitoshi Fukuda | Oily ingredient for cosmetic preparation and cosmetic preparation |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040219178A1 (en) * | 2001-08-21 | 2004-11-04 | Yukitoshi Fukuda | Oily ingredient for cosmetic preparation and cosmetic preparation |
US7417162B2 (en) * | 2001-08-21 | 2008-08-26 | Kyowa Yuka Co., Ltd. | Oily ingredient for cosmetic preparation and cosmetic preparation |
US20120283161A1 (en) * | 2011-05-06 | 2012-11-08 | Samsung Electro-Mechanics Co., Ltd. | Lubricating oil composition |
US8906836B2 (en) * | 2011-05-06 | 2014-12-09 | Samsung Electro-Machanics Co., Ltd. | Lubricating oil composition |
Also Published As
Publication number | Publication date |
---|---|
WO2003033451A1 (en) | 2003-04-24 |
CN1241898C (en) | 2006-02-15 |
CN1564804A (en) | 2005-01-12 |
EP1449823A1 (en) | 2004-08-25 |
JPWO2003033451A1 (en) | 2005-02-03 |
KR20050035128A (en) | 2005-04-15 |
JP4063766B2 (en) | 2008-03-19 |
EP1449823A4 (en) | 2005-12-28 |
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Legal Events
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AS | Assignment |
Owner name: KYOWA HAKKO CHEMICAL CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FUKUDA, YUKITOSHI;SHIMIZU, IKUO;ITO, KATSUHIRO;AND OTHERS;REEL/FRAME:015620/0262;SIGNING DATES FROM 20040609 TO 20040615 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |