Ionic liquid, lubricant, and magnetic recording medium

Patent metadata

Field	Value
Publication number	US-10184092-B2
Application number	US-201515319675-A
Country	US
Kind code	B2
Filing date	May 18, 2015
Priority date	Jun 19, 2014
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

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 R 1 and R 2 each represent a hydrogen atom or R 1 and R 2 form a benzene ring together with carbon atoms to which R 1 and R 2 are bonded, R 3 represents a to straight-chain hydrocarbon group having 10 or more carbon atoms, and R 4 represents a hydrogen atom or a hydrocarbon group in the general formula (1).

First claim

The invention claimed is:

1. 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 represented by the following general formula (3):

where R 1 and R 2 each represent a hydrogen atom or R 1 and R 2 form a benzene ring together with carbon atoms to which R 1 and R 2 are bonded, R 3 represents a straight-chain hydrocarbon group having 10 or more carbon atoms, and R 4 represents a hydrogen atom or a hydrocarbon group in the general formula (1)

where m is an integer of 0 to 2 in the general formula (3).

2. 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:

where R 1 and R 2 each represent a hydrogen atom or R 1 and R 2 form a benzene ring together with carbon atoms to which R 1 and R 2 are bonded, R 3 represents a straight-chain hydrocarbon group having 10 or more carbon atoms, and R 4 represents a hydrogen atom in the general formula (1).

3. The ionic liquid according to claim 2 ,
wherein the conjugate base is represented by any one of the following general formulae (2) to (5):

where n is an integer of 0 to 20 in the general formula (2), m is an integer of 0 to 2 in the general formula (3), n is an integer of 0 to 10 in the general formula (4), and n is an integer of 0 to 6 in the general formula (5).

4. A lubricant comprising:
the ionic liquid according to claim 1 .

5. A lubricant comprising:
the ionic liquid according to claim 2 .

6. A magnetic recording medium comprising:
a non-magnetic support;
a magnetic layer on the non-magnetic support; and
the lubricant according to claim 4 on the magnetic layer.

7. A magnetic recording medium comprising:
a non-magnetic support;
a magnetic layer on the non-magnetic support; and
the lubricant according to claim 5 on the magnetic layer.

8. An ionic liquid comprising:
a conjugate acid (B + ); and
a conjugate base (X − ),
wherein the ionic liquid is represented by the following general formula (Y) 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

9. The ionic liquid according to claim 8 ,
wherein the conjugate base is represented by any one of the following general formula (2) to (5):

where n is an integer of 0 to 20 in the general formula (2), m is an integer of 0 to 2 in the general formula (3), n is an integer of 0 to 10 in the general formula (4), and n is an integer of 0 to 6 in the general formula (5).

10. A lubricant comprising:
the ionic liquid according to claim 9 .

11. A magnetic recording medium comprising:
a non-magnetic support;
a magnetic layer on the non-magnetic support; and
the lubricant according to claim 10 on the magnetic layer.

Assignees

• Dexerials Corp

Inventors

• Kondo Hirofumi
• Hatsuda Kouki
• Ito Makiya
• Tano Nobuo
• Yun Kyungsung
• Watanabe Masayoshi

Classifications

• C07D285/16

  Thiadiazines; Hydrogenated thiadiazines · CPC title

• C07C317/04

  of an acyclic saturated carbon skeleton · CPC title

• C07C311/48

  having nitrogen atoms of sulfonamide groups further bound to another hetero atom · CPC title

• C07C309/06

  containing halogen atoms, or nitro or nitroso groups bound to the carbon skeleton · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title