Ionic liquid, lubricant, and magnetic recording medium

Patent metadata

Field	Value
Publication number	US-10106757-B2
Application number	US-201715485559-A
Country	US
Kind code	B2
Filing date	Apr 12, 2017
Priority date	Apr 13, 2016
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A lubricant, which includes an ionic liquid including a conjugate base and a conjugate acid, wherein the conjugate acid is represented by General Formula (A) below, and wherein a pKa of an acid that is a source of the conjugate base in acetonitrile is 10 or less,

where, in General Formula (A), R 1 , R 2 , and R 3 are each independently a group including a hydrocarbon group, with the proviso that at least one of the hydrocarbon groups in R 1 , R 2 , and R 3 is a straight-chain hydrocarbon group having 6 or greater carbon atoms.

First claim

What is claimed is:

1. A lubricant comprising:
an ionic liquid including a conjugate base and a conjugate acid,

wherein the conjugate acid is represented by General Formula (A) below, and
wherein a pKa of an acid that is a source of the conjugate base in acetonitrile is 10 or less,

where, in General Formula (A), R 1 , R 2 , and R 3 are each independently a group including a hydrocarbon group having 10 or greater carbon atoms.

2. The lubricant according to claim 1 ,
wherein the conjugate base is represented by General Formula (X) or General Formula (Y) below,

where, in General Formula (X), l is an integer of 1 or greater but 12 or less, and
where, in General Formula (Y), n is an integer of 1 or greater but 12 or less.

3. A magnetic recording medium comprising:
a non-magnetic support;
a magnetic layer disposed on the non-magnetic support; and
the lubricant according to claim 1 , disposed on the magnetic layer.

4. An ionic liquid comprising:
a conjugate base; and
a conjugate acid,

wherein the conjugate acid is represented by General Formula (A) below, and
wherein a pKa of an acid that is a source of the conjugate base in acetonitrile is 10 or less,

where, in General Formula (A), R 1 , R 2 , and R 3 are each independently a group including a hydrocarbon group having 10 or greater carbon atoms.

5. The ionic liquid according to claim 4 ,
wherein the conjugate base is represented by General Formula (X) or General Formula (Y) below,

where, in General Formula (X), l is an integer of 1 or greater but 12 or less, and
where, in General Formula (Y), n is an integer of 1 or greater but 12 or less.

6. The lubricant according to claim 1 ,
wherein the conjugate acid is represented by one of structures below:

7. The lubricant according to claim 1 ,
wherein the conjugate base is represented by one of structures below:

8. The ionic liquid according to claim 4 ,
wherein the conjugate acid is represented by one of structures below:

9. The ionic liquid according to claim 4 ,
wherein the conjugate base is represented by one of structures below:

Assignees

• Dexerials Corp

Inventors

• Kondo Hirofumi
• Hatsuda Kouki
• Tano Nobuo
• Baghel Pankaj

Classifications

• C10N2030/08

  Resistance to extreme temperature · CPC title

• C10N2040/18

  in connection with recordings on magnetic tape or disc · CPC title

• C10N2020/077

  Ionic Liquids · CPC title

• C10M2211/06

  Perfluorinated compounds · CPC title

• C10M105/50

  containing halogen · CPC title