Deposition compositions and methods of making and using same

Patent metadata

Field	Value
Publication number	US-11920102-B2
Application number	US-202117795387-A
Country	US
Kind code	B2
Filing date	Jan 21, 2021
Priority date	Jan 29, 2020
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

A deposition composition includes a solvent comprising a hydrofluorothioether compound represented by the following general formula (I): Rf—S—Rh where Rf is a fluorinated or perfluorinated group having 2-9 carbon atoms and optionally includes one or more catenated heteroatoms or chlorine atoms, and Rh is a non-fluorinated hydrocarbon group having 1-3 carbon atoms. The deposition composition further includes a coating material that is soluble or dispersible in said solvent.

First claim

What is claimed is:

1. A deposition composition comprising:
a solvent comprising a hydrofluorothioether represented by the following structural formula (I):
Rf—S—Rh  (I)

where Rf is a perfluorinated group having 2-9 carbon atoms and optionally includes one or more catenated heteroatoms or chlorine atoms, and Rh is a non-fluorinated hydrocarbon group having 1-3 carbon atoms; and

a coating material that is soluble or dispersible in said solvent, wherein said coating material comprises a pigment, lubricant, stabilizer, adhesive, anti-oxidant, dye, polymer, pharmaceutical, release agent, or inorganic oxide.

2. The deposition composition of claim 1 , wherein said coating material comprises a perfluoropolyether, a hydrocarbon, a silicone lubricant, a fluorinated acrylate polymer, or polymer or copolymer of a fluorocarbon or perfluorocarbon monomer.

3. The deposition composition of claim 1 , wherein Rf is a perfluorinated, saturated group having 2-5 carbon atoms.

4. The deposition composition of claim 1 , wherein Rh is CH 3 or CH 3 CH 2 .

5. The deposition composition of claim 1 , wherein the compound having structural formula (I) is present in the deposition composition in an amount of at least 70% by weight, based on the total weight of the deposition composition.

6. A method of depositing a coating onto a substrate, the method comprising:
(a) applying to a substrate a coating of the deposition composition according to claim 1 ; and
(b) removing the hydrofluorothioether from the coating.

7. The method of claim 6 , wherein the substrate is a magnetic hard disk, electrical connector, or medical device.

8. A lubricant composition comprising a hydrofluorothioether represented by the following structural formula (I):
Rf—S—Rh  (I)

where Rf is a perfluorinated group having 2-9 carbon atoms and optionally includes one or more catenated heteroatoms or chlorine atoms, and Rh is a non-fluorinated hydrocarbon group having 1-3 carbon atoms; and
a lubricant soluble or dispersible in the hydrofluorothioether.

9. The lubricant composition of claim 8 , comprising:
(a) 0.001 to 10 wt. % perfluoropolyether lubricant; and
(b) 90 to about 99.999 wt. % of the hydrofluorothioether, based on the total weight of the lubricant composition.

10. The lubricant composition of claim 9 , wherein the perfluoropolyether lubricant comprises a perfluoropolyether compound having polar groups.

11. The lubricant composition of claim 10 , wherein the polar groups comprise alcohol groups.

12. The lubricant composition of claim 11 , wherein the polar groups comprise at least 4 alcohol groups.

13. A method of lubricating a substrate comprising:
(a) applying to a substrate a coating of a lubricant composition according to claim 8 ; and
(b) removing the hydrofluorothioether from the coating.

14. The method of claim 13 , wherein the substrate is magnetic media.

15. A deposition composition comprising:
a solvent comprising a hydrofluorothioether represented by the following structural formula (II):

where n is 0 or 1; m is 0 or 1; X is an oxygen atom or a sulfur atom and Y is an oxygen atom or a sulfur atom, with the proviso X and Yare not both oxygen atoms; and R 1 , R 2 , R 3 , and R 4 are, independently, a fluorine atom, or a partially fluorinated or perfluorinated group having 1 to 4 carbon atoms and optionally includes one or more catenated heteroatoms, chlorine atoms, or bromine atoms; and
a coating material that is soluble or dispersible in said solvent.

Assignees

• 3M Innovative Properties Company

Inventors

• Kehren Jason M
• Lundberg David J
• Qiu Zai-Ming
• Costello Michael G
• Bulinski Michael J
• Monteil Alexandre R

Classifications

• C10M107/38 Primary

  containing halogen · CPC title

• C08K5/372

  Sulfides {, e.g. R-(S)x-R'} · CPC title

• C10M135/08

  containing a sulfur-to-oxygen bond · CPC title

• C10M135/22

  containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms · CPC title

• C10M169/04

  Mixtures of base-materials and additives · CPC title