Ionic liquid, lubricant, and magnetic recording medium

An ionic liquid and lubricant technology, applied in magnetic recording, magnetic recording layer, data recording, etc., can solve the problems of substrate damage and corrosion, and achieve the effect of excellent friction characteristics and excellent practical characteristics.

Inactive Publication Date: 2018-10-23
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It causes corrosion through various tribochemical reactions, which can potentially damage substrates in mechanical systems

Method used

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  • Ionic liquid, lubricant, and magnetic recording medium
  • Ionic liquid, lubricant, and magnetic recording medium
  • Ionic liquid, lubricant, and magnetic recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0220]

[0221] The synthesis of tri(dodecyl)ammonium bis(oxalate)borate was carried out according to the following scheme.

[0222] [chemical formula 17]

[0223]

[0224] [chemical formula 18]

[0225]

[0226] An alcoholic solution of 11.0 g of concentrated hydrochloric acid was added to 49.96 g of tris(dodecyl)amine. After removing the solvent, it was dissolved in dichloromethane, and washed sufficiently with pure water until the washing solution became neutral. The organic layer was dried over anhydrous sodium sulfate and filtered. After removing dichloromethane in the organic layer, recrystallization was performed from a mixed solvent of n-hexane and ethanol to obtain 47.6 g of colorless crystals of tris(dodecyl)ammonium chloride. The yield was 89.0%.

[0227] Dissolve 15.04 g of tris(dodecyl)ammonium chloride in an aqueous ethanol solution, add 5.25 g of an aqueous solution of lithium bis(oxalate)borate, and heat to reflux for 1 hour. After cooling, the sol...

Embodiment 2A

[0235]

[0236] The synthesis of tri(dodecyl)ammonium bis(mandelate)borate was carried out according to the following scheme.

[0237] [chemical formula 19]

[0238]

[0239] First, 0.370 g of lithium carbonate and 0.622 g of boric acid were dissolved in water, and 3.052 g of mandelic acid was added thereto while stirring for 30 minutes. After completion of the addition, the reaction temperature was brought to 60° C., and the reaction was carried out for 2 hours. Return to normal temperature, add 5.585 g of tri(dodecyl)ammonium chloride in ethanol aqueous solution synthesized in Example 1A, and react overnight. After completion of the reaction, extraction was performed with dichloromethane, and the organic layer was then sufficiently washed with pure water. After removing the solvent, vacuum drying was carried out at 100° C. for 20 hours to obtain 7.65 g of colorless waxy tris(dodecyl)ammonium bis(mandelate) borate in a yield of 96.9%. In addition, tri(dodecyl)ammonium...

Embodiment 3A

[0247]

[0248] Trihexyltetradecylammonium bis(oxalate) borate was synthesized according to the following scheme.

[0249] [chemical formula 20]

[0250]

[0251] [chemical formula 21]

[0252]

[0253] 14.84 g of trihexylamine and 15.29 g of bromotetradecane were added to the flask, and reacted at 180° C. for 4 hours. After the reaction was completed, it was cooled, ethyl acetate was added, and the soluble portion was removed by decantation. This method was carried out 3 times to remove unreacted materials. 28.5 g of trihexyltetradecylammonium were obtained as a yellowish liquid. The yield is 94.5%.

[0254] 8.70 g of trihexyltetradecyl ammonium was dissolved in an aqueous ethanol solution, and 3.40 g of an aqueous solution of lithium bis(oxalate) borate was added. Heat to reflux for 1 hour and cool. After the reaction, ethanol was removed, and the reaction product was extracted with dichloromethane. Wash the dichloromethane solution thoroughly with pure water ...

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Abstract

The present invention provides a lubricant or the like. The lubricant uses an ionic liquid which is free from fluorine and has excellent friction characteristics. A lubricant contains an ionic liquidhaving cations and anions, wherein the cations are represented by the following formula (A) and do not have fluorine atoms, and the anions are represented by the following formula (X), and do not havefluorine atoms.

Description

technical field [0001] The present invention relates to an ionic liquid, a lubricant containing the ionic liquid, and a magnetic recording medium using the lubricant. Background technique [0002] Conventionally, for thin-film magnetic recording media, a lubricant is applied to the surface of the magnetic layer in order to reduce friction and wear between the magnetic head and the surface of the medium. In order to avoid bonding such as stiction, the actual film thickness of the lubricant reaches the molecular level. Therefore, it is not an exaggeration to say that the most important thing is to select a lubricant having excellent wear resistance under any environment in the case of a thin film magnetic recording medium. [0003] In terms of the service life of the magnetic recording medium, it is important that the lubricant exists on the surface of the medium without detachment, spin-off, chemical deterioration, or the like. The smoother the surface of the thin film magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/78C10M139/00C07F5/02C07C211/63G11B5/725C10N30/06C10N50/02
CPCC07C211/63C07F5/022C10M105/78C10M139/00G11B5/725C10M2227/00C10M2215/02C10N2030/06C10N2050/02C10M133/06C10M2215/04C10M2227/061C10N2020/077C10N2030/08C10N2040/18
Inventor 近藤洋文初田弘毅多纳信郎潘卡·巴海尔
Owner DEXERIALS CORP
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