Lubricant compositions

Patent metadata

Field	Value
Publication number	US-10540997-B2
Application number	US-201715693372-A
Country	US
Kind code	B2
Filing date	Aug 31, 2017
Priority date	Jan 28, 2015
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

Provided herein is a lubricant including a compound of Formula I

L-(CF 2 CF 2 O) n —CF 2 CH 2 O—N—OCH 2 CF 2 O—(CF 2 CF 2 O) m -M  (Formula I)
wherein L is selected from the group consisting of

M is selected from the group consisting of

wherein each instance of R 1 , R 2 , and R 3 is independently selected from the group consisting of hydroxyl, alkoxyl, carbocycyl, phenyl, heterocycyl, piperonyl, carboxyl, alkylamido, acetamido, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, 2,3-dihydroxy-1-propoxyl, acryloyl, alkacryloyl, methacryloyl, a sustituent of methyl methacrylate, and a substituent of glycidyl ether; and
wherein
n≥1,
m≥1, and
n and m are the same or different.

First claim

What is claimed is:

1. A lubricant composition comprising one or more compounds of Formula I:
L-(CF 2 CF 2 O) n —CF 2 CH 2 O—N—OCH 2 CF 2 O—(CF 2 CF 2 O) m -M  (Formula I)

wherein
L is selected from the group consisting of
R 1 CH 2 CH 2 CH 2 —OCH 2 CF 2 O, R 1 CH 2 CHR 1 CH 2 —OCH 2 CF 2 O, and R 1 CH 2 CHR 1 CHR 1 —OCH 2 CF 2 O,
M is selected from the group consisting of
CF 2 CH 2 O—CH 2 CH 2 CH 2 R 2 , CF 2 CH 2 O—CH 2 CHR 2 CH 2 R 2 , and CF 2 CH 2 O—CHR 2 CHR 2 CH 2 R 2 , and
N is CH 2 CHR 3 CH 2 ;
wherein each instance of R 1 , R 2 , and R 3 is independently selected from the group consisting of hydroxyl, alkoxyl, carbocycyl, phenyl, heterocycyl, piperonyl, carboxyl, alkylamido, acetamido, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, 2,3-dihydroxy-1-propoxyl, acryloyl, alkacryloyl, methacryloyl, a substituent of methyl methacrylate, and a substituent of glycidyl ether; and
wherein
n≥1,
m≥1, and
n and m are the same or different.

2. The lubricant composition of claim 1 , wherein L is
R 1 CH 2 CH 2 CH 2 —OCH 2 CF 2 O.

3. The lubricant composition of claim 1 , wherein M is CF 2 CH 2 O—CH 2 CH 2 CH 2 R 2 .

4. The lubricant composition of claim 1 , wherein the molecular weight of one or more of the compounds is about 1000 Da to about 7000 Da.

5. The lubricant composition of claim 1 , wherein the molecular weight of one or more of the compounds is about 2000 Da to about 4000 Da.

6. The lubricant composition of claim 1 , wherein n=1, and wherein m=1.

7. The lubricant composition of claim 1 , wherein L is R 1 CH 2 CH 2 CH 2 —OCH 2 CF 2 O, and wherein R1 is hydroxyl.

8. The lubricant composition of claim 1 , wherein M is CF 2 CH 2 O—CH 2 CH 2 CH 2 R 2 , and wherein R2 is hydroxyl.

9. The lubricant composition of claim 1 , wherein R 3 is hydroxyl.

10. The lubricant composition of claim 1 , wherein the structure of one or more of the compounds is of Formula II
(OH)CH 2 CH(OH)CH 2 —OCH 2 CF 2 O—(CF 2 CF 2 O) n —CF 2 CH 2 O—CH 2 CH(OH)—CH 2 —OCH 2 CF 2 O—(CF 2 CF 2 O) m —CF 2 CH 2 O—CH 2 CH(OH)CH 2 (OH)

wherein
n≥1,
m≥1, and
n and m are the same or different.

11. A method of lubricating a media storage layer surface in an apparatus, the method comprising the step of applying a lubricant composition of claim 1 over a surface to be lubricated.

12. The method of claim 11 , wherein the lubricant layer is a thin film having a thickness from about 5 Angstroms to about 50 Angstroms.

13. The method of claim 12 , wherein the lubricant layer is a thin film having a thickness from about 8 Angstroms to about 40 Angstroms.

14. The method of claim 13 , wherein the lubricant layer is a thin film having a thickness from about 10 Angstroms to about 200 Angstroms.

15. The method of claim 11 , wherein the relative touchdown spacing of the lubricant composition of claim 1 on a media storage layer is more than 2 Angstroms compared to the touchdown spacing of Z-Tetraol.

16. The method of claim 11 , wherein the total organic adsorption of the lubricant composition of claim 1 on a media storage layer is less than 45 percent of the total organic adsorption of Z-Tetraol.

17. A surface-coated media storage apparatus made by the steps of:
(a) providing a substrate,
(b) depositing a thin film onto the substrate to create a seed layer,
(c) depositing a thin film onto the seed layer to create a magnetic layer,
(d) depositing a thin film onto the magnetic layer to create a protective layer,
(e) depositing a lubricant onto the protective layer,
wherein the lubricant layer comprises the composition of claim 1 .

18. The surface-coated media storage apparatus of claim 17 , wherein the substrate is selected from nickel-phosphorous-plated aluminum or glass disk.

19. The surface-coated media storage apparatus of claim 17 , wherein the seed layer is chromium.

20. The surface-coated media storage apparatus of claim 17 , wherein magnetic layer is applied at a thickness of about 500 Angstroms and is a magnetic alloy comprising cobalt, platinum, and/or chromium, and
the protective layer is diamond-like carbon and is about or less than 150 Angstroms thick.

Assignees

• Seagate Technology Llc

Inventors

• Yang Jiping

Classifications

• C10N2040/18

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

• C10N2030/00

  Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C07C43/137

  containing halogen · CPC title

• C10M2213/023

  used as base material · CPC title