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Synthetic Lubricating Oil

a technology ionic liquid, which is applied in the field of synthetic lubricating oil, can solve the problems of insufficient viscosity reduction of ionic liquid comprising this combination of anion, flash ignition or evaporation danger of lubricating oil, etc., and achieves excellent anti-abrasion properties, stable flowability and viscosity characteristics, and stable lubricating properties.

Inactive Publication Date: 2009-10-29
THE NIPPON SYNTHETIC CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Thus, the present inventors have made extensive study under considering the above situation to find surprisingly that an ionic liquid having remarkably low viscosity and excellent viscosity stability can be obtained by using a bis(fluorosulfonyl)imide anion as an anion seed in an ionic liquid using an organic cation selected from an imidazolium cation, a pyridinium cation, a quaternary ammonium cation and a quaternary phosphonium cation and this ionic liquid can suitably be used as a synthetic lubricating oil.
[0011]The ionic liquid and the ionic liquid composition used in the present invention are useful as lubricating oil which is excellent in anti-abrasion property and further has stable flowability, and viscosity characteristics required for lubricating oil, and still further has stable lubricating properties in a wide temperature range and a wide using condition.

Problems solved by technology

However, those lubricating oils are accompanied with a danger of flash ignition or evaporation under specific conditions such as high temperature and highly vacuum pressure, and thus more suitable lubricating oil has been desired.
However, it has been said that the ionic liquid comprising this combination of an anion is not sufficient in reduction of viscosity.

Method used

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  • Synthetic Lubricating Oil

Examples

Experimental program
Comparison scheme
Effect test

synthesis example 1

[0050]In a flask equipped with a refluxing column were charged 19.1 g (0.10 mol) of 1-ethyl-3-methylimidazolium bromide and 20 ml of water, and further 21.9 g (0.10 mol) of potassium salt of bis(fluorosulfonyl)imide, followed by stirring at 40° C. for 5 hours. After the reaction, 80 ml of methylene chloride was added, followed by well stirring and fractionating. The methylene chloride layer was washed five times each with 40 ml of water, and the methylene chloride layer is concentrated under reduced pressure to give 23.8 g (0.08 mol, yield: 81.8%) of 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide.

synthesis example 2

[0051]The same procedure as the above Synthesis example 1 excepting using 20.5 g of 1-methyl-3-propylimidazolium bromide in place of 19.1 g of 1-ethyl-3-methylimidazolium bromide was conducted to give 27.5 g (0.09 mol, yield: 90.1%) of 1-methyl-3-propylimidazolium bis(fluorosulfonyl)imide. Viscosity of this compound was 29 mPa·s (25° C.).

synthesis example 3

[0052]The same procedure as the above Synthesis example 1 excepting using 20.5 g of 1-methyl-3-isopropylimidazolium bromide in place of 19.1 g of 1-ethyl-3-methylimidazolium bromide was conducted to give 27.1 g (0.09 mol, yield: 88.8%) of 1-methyl-3-isopropylimidazolium bis(fluorosulfonyl) imide. Viscosity of this compound was 27 mPa·s (25° C.).

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Abstract

The object of the present invention is to provide a synthetic lubrication oil which shows low viscosity, is excellent in viscosity properties at high temperature and shows stable lubricating properties in a wide range of temperature. The synthetic lubricating oil is one comprising an ionic liquid containing an organic cation selected from the group consisting of an imidazolium cation, a pyridinium cation, a quaternary ammonium cation and a quaternary phosphonium cation and a bis(fluorosulfonyl)imide anion, and one comprising an ionic liquid composition which comprises an ionic liquid (A) containing a 1-ethyl-3-methylimidazolium cation and an ionic liquid (B1) containing a 1-methyl-3-propylimidazolium cation and / or an ionic liquid (B2) containing a 1-methyl-3-isopropylimidazolium cation.

Description

RELATED APPLICATION[0001]This application is a U.S. national phase application under 35 U.S.C. §371 of International Application No. PCT / JP2006 / 322477 filed Nov. 10, 2006 which claims priority of Japanese Patent Application No. 2005-328695 filed Nov. 14, 2005 and Japanese Patent Application No. 2006-240058 filed Sep. 5, 2006.TECHNICAL FIELD[0002]The present invention relates to a synthetic lubricating oil comprising an ionic liquid selected from an organic cation and a bis(fluorosulfonyl)imide anion, and to a synthetic lubricating oil comprising an ionic liquid composition which is a mixture of two or more ionic liquids containing a 1,3-substituted imidazolium cation.BACKGROUND ART[0003]As a lubricating oil used in a machinery installment, a power transmission device, a metallurgical processing oil, grease and the like, base oil selected from a poly α-olefin, a diester, a polyol ester, silicone and the like as the best ingredient has so far been used under optionally mixing with a s...

Claims

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Application Information

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IPC IPC(8): C10M133/40C10M133/46C10M135/08
CPCC10M105/72C10M2215/02C10M2215/023C10M2215/2203C10M2215/221C10N2230/02C10M2215/2245C10M2219/0406C10M2219/044C10N2220/04C10N2220/13C10M2215/224C10N2020/077C10N2020/085C10N2030/02
Inventor KAWATA, NARITOSHIHONDA, YOU
Owner THE NIPPON SYNTHETIC CHEM IND CO LTD
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