Oleophobic coatings

Patent metadata

Field	Value
Publication number	US-9296918-B2
Application number	US-201314379313-A
Country	US
Kind code	B2
Filing date	Feb 6, 2013
Priority date	Feb 20, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

A polymeric coating for a glass substrate includes a hexafluoropropylene oxide derived silane polymer. The hexafluoropropylene oxide derived silane polymer has a molecular weight of greater than about 5500, a thickness of between about 2 and about 15 nanometers and a coefficient of friction constant of less than about 0.35. A water contact angle of the polymeric hexafluoropropylene oxide derived silane coating decreases by less than about 27% after being subjected to 10000 abrasion cycles.

First claim

The invention claimed is:

1. A polymeric coating for a glass substrate comprising:
a hexafluoropropylene oxide derived silane polymer having the following formula:
F(CF(CF 3 )CF 2 O) n CF(CF 3 )—CH 2 O—CH 2 CH 2 CH 2 —Si(R 1 ) 3-x (R 2 ) x

where R 1 is hydroxy or a hydrolyzable group, R 2 is a non-hydrolyzable group, x is 0, 1, or 2, and n is an integer in a range of about 4 to about 150;
wherein the hexafluoropropylene oxide derived silane polymer has a molecular weight of greater than about 5500;
wherein a water contact angle of the polymeric hexafluoropropylene oxide derived silane coating decreases by less than about 27% after 10000 abrasion cycles;
wherein the polymeric hexafluoropropylene oxide derived silane coating has a thickness of between about 2 and about 15 nanometers; and
wherein the polymeric hexafluoropropylene oxide derived silane coating has a coefficient of friction constant of less than about 0.35.

2. The polymeric coating of claim 1 , wherein the water contact angle of the polymeric hexafluoropropylene oxide derived silane coating decreases by less than about 25% after 10000 abrasion cycles.

3. The polymeric coating of claim 1 , wherein a hexadecane contact angle of the polymeric hexafluoropropylene oxide derived silane coating decreases by less than about 8% after 10000 abrasion cycles.

4. The polymeric coating of claim 3 , wherein a hexadecane contact angle of the polymeric hexafluoropropylene oxide derived silane coating decreases by less than about 6% after 10000 abrasion cycles.

5. The polymeric coating of claim 1 , wherein the polymeric hexafluoropropylene oxide derived silane coating has a coefficient of friction constant of less than about 0.32.

6. The polymeric coating of claim 1 , wherein the molecular weight of the polymeric hexafluoropropylene oxide derived silane coating is based on a single molecular weight.

7. The polymeric coating of claim 1 , wherein the molecular weight of the polymeric hexafluoropropylene oxide derived silane coating is based on more than one molecular weight.

8. The polymeric coating of claim 1 , wherein the polymeric coating is disposed on a consumer electronic device.

Assignees

• 3M Innovative Properties Co

Inventors

• Olson Erik D
• Flynn Richard M
• Vitcak Daniel R
• Manske Karl J
• Bechtold Kevin J
• Tan Lian S

Classifications

• C08G77/24

  halogen-containing groups · CPC title

• C09D201/10

  containing hydrolysable silane groups · CPC title

• C09D127/20 Primary

  Homopolymers or copolymers of hexafluoropropene · CPC title

• C09D183/08

  containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen · CPC title

• C03C17/32

  with synthetic or natural resins (C03C17/30 takes precedence) · CPC title