Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

Patent metadata

Field	Value
Publication number	US-11011200-B2
Application number	US-201715640729-A
Country	US
Kind code	B2
Filing date	Jul 3, 2017
Priority date	Jul 5, 2016
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

This fluorine-containing ether compound is represented by Formula (1).

R 1 —R 2 —CH 2 —R 3 —CH 2 —R 4 —R 5   (1)
(in Formula (1), R 1 is an aryl group or an aralkyl group, R 2 is a divalent linking group having 0 or 1 polar group, R 3 is a perfluoropolyether chain, R 4 is a divalent linking group having 2 or 3 polar groups, and R 5 is an aryl group or an aralkyl group.)

First claim

What is claimed is:

1. A fluorine-containing ether compound represented by Formula (1),
R 1 —R 2 —CH 2 —R 3 —CH 2 —R 4 —R 5   (1)

in Formula (1), R 1 is any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent,
R 2 is represented by —O— or Formula (4)

R 3 is a perfluoropolyether chain represented by any one of Formulas (3-1), (3-2), and (3-3),

in Formula (3-1), m represents an integer of 1 to 30, and n represents an integer of 0 to 30,

in Formula (3-2), u represents an integer of 1 to 30,

in Formula (3-3), v represents an integer of 1 to 30,
R 4 is represented by Formula (2)

in Formula (2), t represents an integer of 2 or 3, r represents an integer of 1 to 4, and k represents an integer of 0 to 3, and
R 5 is any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent.

2. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (5),

in Formula (5), X represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or plural and, when plural, X may be the same or different from each other, R 5 represents any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.

3. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (6),

in Formula (6), Y represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or a plurality and, when a plurality, Y may be the same or different from each other, R 5 represents any one selected from a benzene ring group which may have a substituent, a naphthalene ring group which may have a substituent, a benzyl group which may have a substituent, or a naphthylmethyl group which may have a substituent, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.

4. The fluorine-containing ether compound according to claim 1 ,
wherein the compound in Formula (1) is represented by Formula (7),

in Formula (7), Y represents any one of a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluoroalkyl group having 1 to 5 carbon atoms, and may be one or a plurality and, when a plurality, Y may be the same or different from each other, R 5 represents an aryl group or an aralkyl group, p represents an integer of 1 to 30, q represents an integer of 0 to 30, and s represents an integer of 0 to 3.

5. The fluorine-containing ether compound according to claim 1 ,
wherein a number-average molecular weight is in a range of 500 to 10,000.

6. A lubricant for a magnetic recording medium, comprising:
the fluorine-containing ether compound according to claim 1 .

7. A magnetic recording medium, comprising:
at least a magnetic layer;
a protective layer; and
a lubricating layer sequentially provided on a substrate,
wherein the lubricating layer includes the fluorine-containing ether compound according claim 1 .

8. The magnetic recording medium according to claim 7 ,
wherein an average film thickness of the lubricating layer is 0.5 nm to 2 nm.

9. The fluorine-containing ether compound according to claim 1 , wherein in Formula (2), t represents an integer of 3.

10. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (8),

In Formula (8), x represents an integer of 1 to 15, z represents an integer of 0 to 15, and Me represents a methyl group.

11. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (9),

In Formula (9), x represents an integer of 1 to 15, and z represents an integer of 0 to 15.

12. The fluorine-containing ether compound according to claim 1 , wherein the compound in Formula (1) is represented by Formula (11),

In Formula (11), x represents an integer of 1 to 15, and z represents an integer of 0 to 15.

Assignees

• Showa Denko Kk

Inventors

• UETAKE Shoko
• Fukumoto Naoya
• Yagyu Daisuke
• Yamaguchi Yuta
• Ito Naoko
• Tomita Hiroyuki
• Miyasaka Ryuta
• Murofushi Katsumi

Classifications

• G11B5/7257 Primary

  Perfluoropolyether lubricant · CPC title

• C10M2213/043

  used as base material · CPC title

• C10N2040/18

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

• C07D303/28 Primary

  Ethers with hydroxy compounds containing oxirane rings · CPC title

• C07C43/23

  containing hydroxy or O-metal groups · CPC title