Fluoropolyether compound, lubricant, and magnetic disk

Patent metadata

Field	Value
Publication number	US-10047316-B2
Application number	US-201515318511-A
Country	US
Kind code	B2
Filing date	Jun 22, 2015
Priority date	Jun 24, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The disclosure provides a fluoropolyether compound represented by formula (1):

R 1 —CH 2 —R 2 —CH 2 —R 3

wherein R 1 is C 1 -C 10 alkoxy; R 2 is —(CF 2 ) p O(CF 2 O) x (CF 2 CF 2 O) y (CF 2 CF 2 CF 2 O) z (CF 2 CF 2 CF 2 CF 2 O) w (CF 2 ) p —; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; R 3 is —OCH 2 CH(OH)CH 2 OH, —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH, —O(CH 2 ) m OH, or —OCH 2 (OH)CHCH 2 —OC 6 H 4 —R 4 ; m is an integer of 2 to 8; and R 4 is hydrogen, C 1 -C 4 alkoxy, amino, or an amide residue; and also provides a lubricant having the compound and a magnetic disk.

First claim

The invention claimed is:

1. A fluoropolyether compound represented by formula (1):
R 1 —CH 2 —R 2 —CH 2 —R 3   (1)

wherein R 1 is C 1 -C 5 alkoxy;
R 2 is —(CF 2 ) p O(CF 2 O) x (CF 2 CF 2 O) y (CF 2 CF 2 CF 2 O) z (CF 2 CF 2 CF 2 CF 2 O) w (CF 2 ) p —; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; and
R 3 is —OCH 2 CH(OH)CH 2 OH, —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH, or —O(CH 2 ) m OH; m is an integer of 2 to 8.

2. A lubricant comprising a fluoropolyether compound represented by formula (1):
R 1 —CH 2 —R 2 —CH 2 —R 3   (1)

wherein R 1 is C 1 -C 5 alkoxy;
R 2 is —(CF 2 ) p O(CF 2 O) x (CF 2 CF 2 O) y (CF 2 CF 2 CF 2 O) z (CF 2 CF 2 CF 2 CF 2 O) w (CF 2 ) p —; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; and
R 3 is —OCH 2 CH(OH)CH 2 OH, —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH, or —O(CH 2 ) m OH; m is an integer of 2 to 8.

3. The lubricant according to claim 2 , further comprising a lubricant for magnetic disks.

4. The lubricant according to claim 3 , wherein the lubricant according to claim 2 and the lubricant for magnetic disks are contained at a weight ratio of 1:99 to 50:50.

5. A magnetic disk comprising, in this order, a substrate, and at least a recording layer and a protective layer, and having a lubricant layer on the surface of the protective layer, wherein the lubricant layer comprises the lubricant according to claim 3 .

6. A magnetic disk comprising, in this order, a substrate, and at least a recording layer and a protective layer, and having a lubricant layer on the surface of the protective layer, wherein the lubricant layer comprises the lubricant according to claim 4 .

7. The fluoropolyether compound according to claim 1 , wherein R 3 is —OCH 2 CH(OH)CH 2 OH.

8. The fluoropolyether compound according to claim 1 , wherein R 3 is —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH.

9. The fluoropolyether compound according to claim 1 , wherein R 3 is —O(CH 2 ) m OH.

10. The lubricant according to claim 2 , wherein R 3 is —OCH 2 CH(OH)CH 2 OH.

11. The lubricant according to claim 2 , wherein R 3 is —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH.

12. The lubricant according to claim 2 , wherein R 3 is —O(CH 2 ) m OH.

13. The fluoropolyether compound according to claim 1 , wherein x is not 0.

14. The fluoropolyether compound according to claim 1 , wherein y is not 0.

15. The fluoropolyether compound according to claim 1 , wherein z is not 0.

16. The fluoropolyether compound according to claim 1 , wherein w is not 0.

17. The fluoropolyether compound according to claim 1 , wherein x and y are each a real number of 0 to 10.

18. The fluoropolyether compound according to claim 1 , wherein z is a real number of 0 to 10.

Assignees

• Moresco Corp

Inventors

• Sagata Ryosuke
• Kasai Haruo

Classifications

• G11B5/82

  Disk carriers · CPC title

• C10N2030/10

  Inhibition of oxidation, e.g. anti-oxidants · CPC title

• C08G65/337 Primary

  containing other elements (organic compounds containing halogens only as halides of a carboxyl group C08G65/332) · CPC title

• C10N2030/56

  Boundary lubrication or thin film lubrication · CPC title

• C10N2040/18

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