Fluorocarbon release coating

Patent metadata

Field	Value
Publication number	US-10967399-B2
Application number	US-201716311437-A
Country	US
Kind code	B2
Filing date	Jun 15, 2017
Priority date	Jun 30, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

An organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a surface composition of about 5 at % to about 15 at % oxygen and about 30 at % to about 50 at % fluorine.

First claim

The invention claimed is:

1. An organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a surface composition of about 5 at % to 15 at % oxygen and about 30 at % to 50 at % fluorine; wherein the major surface of the substrate comprises protruding or recessed structures with a density of about 10 structures per mm 2 to about 10,000 structures per mm 2 , and wherein the coating overlies and conforms to the structures.

2. The coating of claim 1 , wherein the coating has a thickness of less than about 500 nm.

3. The coating of claim 1 , wherein the coating has a release peel force from the substrate of less than about 15 grams/inch.

4. A method of making the coating of claim 1 , comprising:
introducing a gaseous fluorocarbon reactant into a reaction chamber;
reacting the gaseous fluorocarbon reactant in the presence of a plasma and sufficient oxygen to form an organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a thickness of less than about 500 nm and wherein the coating comprises about 0.25 at % to about 2.5 at % of oxygen in fluoroether form.

5. An article comprising an organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a surface composition of about 5 at % to 15 at % oxygen and about 30 at % to 50 at % fluorine; wherein the major surface of the substrate comprises protruding or recessed structures with a density of about 10 structures per mm 2 to about 10,000 structures per mm 2 , wherein the coating overlies and conforms to the structures, wherein the substrate comprises a polymeric film, and wherein the organofluorine coating comprises fluoroether species.

6. The article of claim 5 , wherein the organofluorine coating has a thickness of less than about 500 nm.

7. The article of claim 5 , further comprising:
a barrier functional coating on the organofluorine coating, wherein the barrier functional coating comprises a polymeric layer on the organofluorine coating and a metal oxide layer on the polymeric layer.

8. An organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a surface composition of about 5 at % to 15 at % oxygen and about 30 at % to 50 at % fluorine; wherein the major surface of the substrate comprises protruding or recessed structures with a density of about 10 structures per mm 2 to about 10,000 structures per mm 2 , and wherein the coating overlies and conforms to the structures, wherein the organofluorine coating is a fluoropolymer comprising copolymeric repeat units derived from at least one of fluorocarbons having a formula C x F y and oxyfluorocarbons having a formula C x F y O z , wherein x, y, and z are non-zero positive integers with x=1-6, y=4-14, and z=1, and wherein the values of x, y and z are selected such that the coating comprises about 5 at % to about 15 at % oxygen and about 30 at % to about 50 at % fluorine.

9. The coating of claim 8 , wherein the fluorocarbons and oxyfluorocarbons are chosen from CF 4 , C 2 F 6 , C 3 F 8 , C 4 F 10 , and C 6 F 14 , C 6 F 12 O, and combinations thereof.

10. The coating of claim 9 , wherein the fluorocarbon is C 6 F 14 .

11. An organofluorine coating on a major surface of a substrate, wherein the organofluorine coating has a surface composition of about 5 at % to 15 at % oxygen and about 30 at % to 50 at % fluorine; wherein the major surface of the substrate comprises protruding or recessed structures with a density of about 10 structures per mm 2 to about 10,000 structures per mm 2 , and wherein the coating overlies and conforms to the structures, wherein the organofluorine coating is a fluoropolymer comprising repeat units derived from fluorocarbons having a formula C x F y , wherein x=1-6 and y=4-14, reacted with an amount of oxygen sufficient to provide a copolymer with about 5 at % to about 15 at % oxygen and about 30 at % to about 50 at % fluorine.

12. The coating of claim 11 , wherein the fluorocarbons are chosen from CF 4 , C 2 F 6 , C 3 F 8 , C 4 F 10 , and C 6 F 14 , and combinations thereof.

Assignees

• 3M Innovative Properties Co

Inventors

• Yu Ta-Hua
• David Moses M
• Hagen Kevin D
• Carpenter Samuel J
• Hanson Eric J
• Wolk Martin B
• Mcman Steven J
• Schwartz Evan L

Classifications

• B32B27/308

  comprising acrylic (co)polymers · CPC title

• C08J7/048

  Forming gas barrier coatings · CPC title

• C08J2427/12

  containing fluorine atoms · CPC title

• C08J7/043

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• B32B2327/12

  containing fluorine · CPC title