IONIC LIQUID, LUBRICANT, AND MAGNETIC RECORDING MEDIUM

• US 20170130156A1
• Filed: 05/18/2015
• Published: 05/11/2017
• Est. Priority Date: 06/19/2014
• Status: Active Grant

• Current Assignee: Dexerials Corporation
• Original Assignee: Dexerials Corporation
• Inventors: KONDO, Hirofumi, HATSUDA, Kouki, ITO, Makiya, TANO, Nobuo, YUN, Kyungsung, WATANABE, Masayoshi
• Granted Patent: US 10,184,092 B2
• Time in Patent Office: Days
• CPC Class Codes: C07C 309/06 containing halogen atoms, or nitro or nitroso groups bound to the carbon skeleton
• CPC Class Codes: C07C 311/48 having nitrogen atoms of sulfonamide groups further bound to another hetero atom
• CPC Class Codes: C07C 317/04 of an acyclic saturated carbon skeleton
• CPC Class Codes: C07D 233/58 with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
• CPC Class Codes: C07D 285/16 Thiadiazines; Hydrogenated thiadiazines
• CPC Class Codes: C10M 105/54 containing carbon, hydrogen, halogen and oxygen
• CPC Class Codes: C10M 105/70 as ring hetero atom
• CPC Class Codes: C10M 105/72 containing sulfur, selenium or tellurium
• CPC Class Codes: C10M 2215/305 used as base material
• CPC Class Codes: C10M 2219/0406 used as base material
• CPC Class Codes: C10M 2219/044 Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10N 2020/077 Ionic Liquids
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/08 Resistance to extreme temperature
• CPC Class Codes: C10N 2030/10 Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2040/18 in connection with recordings on magnetic tape or disc
• CPC Class Codes: C10N 2050/02 dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
• CPC Class Codes: G11B 5/7253 Fluorocarbon lubricant

Abstract

A lubricant including: an ionic liquid, which includes a conjugate acid (B⁺) and a conjugate base (X⁻), and is protic, wherein the ionic liquid is represented by the following general formula (1), and wherein the conjugate base is a conjugate base of sulfonic acid, a conjugate base of sulfonimide, or a conjugate base of trisulfonylmethide:

where R¹ and R² each represent a hydrogen atom or R¹ and R² form a benzene ring together with carbon atoms to which R¹ and R² are bonded, R³ represents a to straight-chain hydrocarbon group having 10 or more carbon atoms, and R⁴ represents a hydrogen atom or a hydrocarbon group in the general formula (1).

Claims

1. A lubricant comprising:

an ionic liquid, which includes a conjugate acid (B⁺) and a conjugate base (X⁻

), and is protic,

wherein the ionic liquid is represented by the following general formula (1), and

wherein the conjugate base is a conjugate base of sulfonic acid, a conjugate base of sulfonimide, or a conjugate base of trisulfonylmethide;

2. The lubricant according to claim 1,

wherein the conjugate base is represented by any one of the following general formulae (2) to (5):

3. A magnetic recording medium comprising:

a non-magnetic support;

a magnetic layer on the non-magnetic support; and

the lubricant according to claim 1 on the magnetic layer.

4. An ionic liquid comprising:

a conjugate acid (B′

); and

a conjugate base (X⁻

),

wherein the ionic liquid is represented by the following general formula (1) and is protic, and

wherein the conjugate base is a conjugate base of sulfonic acid, a conjugate base of sulfonimide, or a conjugate base of trisulfonylmethide;

5. The ionic liquid according to claim 4,

wherein the conjugate base is represented by any one of the following general formulae (2) to (5):