Fluoropolyether compound, lubricant, magnetic disk, and method for producing same

Patent metadata

Field	Value
Publication number	US-10047317-B2
Application number	US-201515529841-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Nov 28, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

Disclosed is a fluoropolyether compound comprising a C4-10 aliphatic hydrocarbon chain present in the middle of the fluoropolyether compound and at least two perfluoropolyethers.

First claim

The invention claimed is:

1. A fluoropolyether compound comprising
(i) a C 4-10 aliphatic hydrocarbon chain present in the middle of the fluoropolyether compound and
(ii) at least two perfluoropolyethers, each perfluoropolyether being ether-linked to the C 4-10 aliphatic hydrocarbon chain,
the C 4-10 aliphatic hydrocarbon chain having at least one hydroxyl group,
the at least two perfluoropolyethers having, at respective non-hydrocarbon chain terminals, at least one polar group selected from the group consisting of —OH, —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, and —OCH 2 (OH)CHCH 2 —OC 6 H 4 —R 1 ,
wherein m is an integer of 2 to 8, and R 1 represents hydrogen, C 1-4 alkoxy, amino, or an amide residue.

2. The fluoropolyether compound according to claim 1 , wherein the C 4-10 aliphatic hydrocarbon chain has 8 carbon atoms.

3. The fluoropolyether compound according to claim 1 , which is at least one member selected from the group consisting of
HOCH 2 CH(OH)CH 2 OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 OCH 2 CH(OH)CH 2 OH, wherein z is a real number of 0 to 30,
HOCH 2 CH(OH)CH 2 OCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 OCH 2 CH(OH)CH 2 OH, wherein w is a real number of 0 to 20,
HOCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 OH, wherein z is a real number of 0 to 30, and
HOCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 OH, wherein w is a real number of 0 to 20.

4. A lubricant comprising the fluoropolyether compound according to claim 1 .

5. A magnetic disk comprising, in sequence over a substrate: a recording layer, a protective layer, and a lubricant layer,
wherein the lubricant layer is formed by applying the lubricant according to claim 4 to the surface of the protective layer, and performing ultraviolet irradiation or heat treatment.

6. A method for producing a magnetic disk that comprises in sequence over a substrate, a recording layer, a protective layer, and a lubricant layer, the method comprising
forming the recording layer and the protective layer over the substrate in this order,
applying the lubricant according to claim 4 to the surface of the protective layer, and
performing ultraviolet irradiation or heat treatment to form the lubricant layer.

7. The fluoropolyether compound according to claim 2 , which is at least one member selected from the group consisting of
HOCH 2 CH(OH)CH 2 OCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 OCH 2 CH(OH)CH 2 OH, wherein z is a real number of 0 to 30,
HOCH 2 CH(OH)CH 2 OCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 OCH 2 CH(OH)CH 2 OH wherein w is a real number of 0 to 20,
HOCH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z CF 2 CF 2 CH 2 OH, wherein z is a real number of 0 to 30, and
HOCH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 —OCH 2 CH(OH)CH 2 CH 2 CH 2 CH 2 CH(OH)CH 2 O—CH 2 CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) w CF 2 CF 2 CF 2 CH 2 OH, wherein w is a real number of 0 to 20.

8. A lubricant comprising the fluoropolyether compound according to claim 2 .

9. The fluoropolyether compound according to claim 1 , wherein the at least two perfluoropolyethers comprises, at respective non-hydrocarbon chain terminals, —OH, —OCH 2 CH(OH)CH 2 OH.

10. The fluoropolyether compound according to claim 1 , wherein the at least two perfluoropolyethers comprises, at respective non-hydrocarbon chain terminals, —OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH.

11. The fluoropolyether compound according to claim 1 , wherein the at least two perfluoropolyethers comprises, at respective non-hydrocarbon chain terminals, —O(CH 2 ) m OH, and —OCH 2 (OH)CHCH 2 —OC 6 H 4 —R 1 .

12. The fluoropolyether compound according to claim 1 , wherein R 1 is hydrogen.

13. The fluoropolyether compound according to claim 1 , wherein R 1 is C 1-4 alkoxy.

14. The fluoropolyether compound according to claim 1 , wherein R 1 is amino.

15. The fluoropolyether compound according to claim 1 , wherein R 1 is an amide residue.

16. The fluoropolyether compound according to claim 3 , wherein z is not 0, and w is not 0.

17. The fluoropolyether compound according to claim 3 , wherein z is a real number of 2 to 8, and w is a real number of 1 to 5.

Assignees

• Moresco Corp

Inventors

• Sagata Ryosuke
• Shimizu Tsuyoshi
• Kasai Haruo

Classifications

• G11B5/84

  Processes or apparatus specially adapted for manufacturing record carriers · CPC title

• C10N2050/025

  in the form of films or sheets · CPC title

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C10N2040/18

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

• C07C43/13

  containing hydroxy or O-metal groups (C07C43/11 takes precedence) · CPC title