IONIC LIQUID, LUBRICANT, AND MAGNETIC RECORDING MEDIUM

• Main Authors: ITO MAKIYA, YUN KYON SONG, WATANABE MASAYOSHI, TANO NOBUO, KONDO HIROFUMI, HATSUDA KOKI
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; FUELS; HETEROCYCLIC COMPOUNDS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICS; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

PROBLEM TO BE SOLVED: To provide: an ionic liquid having excellent lubricity even at a high temperature, which is applied on a magnetic layer surface of a thin film magnetic recording medium; a lubricant; and a magnetic recording medium.SOLUTION: The lubricant comprises an ionic liquid containing a conjugate acid (B) and a conjugate base (X) and being protic. The ionic liquid is represented by the following formula (1), and the conjugate base is any of a conjugate base of a sulfonic acid, a conjugate base of a sulfonimide, and a conjugate base of a trisulfonylmethide. (Rand Rare H or an aryl group; Ris a linear hydrocarbon group having 10 or more carbon atoms; and Ris H or a hydrocarbon group.) 【課題】薄膜磁気記録媒体における磁性層表面に塗布される、高温においても優れた潤滑性を有するイオン液体、潤滑剤、及び磁気記録媒体の提供。【解決手段】共役酸（Ｂ＋）と共役塩基（Ｘ−）とを有し、プロトン性であるイオン液体を含有し、前記イオン液体が、下式（１）で表され、前記共役塩基が、スルホン酸の共役塩基、スルホンイミドの共役塩基、及びトリスルホニルメチドの共役塩基のいずれかである潤滑剤。（Ｒ１及びＲ２はＨ又はアリール基；Ｒ３はＣ１０以上の直鎖状の炭化水素基；Ｒ４はＨ、及び炭化水素基）【選択図】図１