Article having coating on substrate, coating composition, and coating method

Patent metadata

Field	Value
Publication number	US-9791598-B2
Application number	US-201615142722-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Oct 31, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

Provided is a coating technology additionally excellent in, for example, water repellency, oil repellency, and ease of dirt removal. An article having a coating on a substrate, in which the coating contains:
(a) a polyhedral oligomeric silsesquioxane; and (b) an acrylate polymer having a structural unit represented by the following general formula (II): where Ra represents a hydrogen atom or a methyl group, Rf represents —CH 2 —(CF 2 ) q —CF 3 or —CH(CF 3 ) 2 , and q represents an integer of 0 to 8.

First claim

The invention claimed is:

1. An article having a coating on a substrate, wherein the coating comprises:
(a) a polyhedral oligomeric silsesquioxane; and
(b) an acrylate polymer having a structural unit represented by the following general formula (II):

where Ra represents a hydrogen atom or a methyl group, Rf represents —CH 2 —(CF 2 ) q —CF 3 or —CH(CF 3 ) 2 , and q represents an integer of 0 to 8,
wherein the coating comprises the polyhedral oligomeric silsesquioxane at least in the following proportion X:
the proportion X refers to, in “profile where as the proportion of the polyhedral oligomeric silsesquioxane increases, a liquid droplet sliding angle on a surface of a coating film decreases or temporarily increases and then decreases, but a change in the decrease gradually becomes smailler,” a proportion at a starting point at which the change becomes smaller.

2. The article according to claim 1 , wherein the a polyhedral oligomeric silsesquioxane is represented by the following general formula (I);

where R represents —(CH 2 ) 2 —(CF 2 ) p —CF 3 , and p represents an integer of 0 to 9.

3. The article according to claim 1 , wherein the q represents an integer of 0 to 5.

4. The article according to claim 1 , wherein the coating has a surface arithmetic mean roughness of 2.5 nm or less.

5. The article according to claim 1 , wherein the coating has water repellency and oil repellency in which a sliding angle for linoleic acid is 4.0 degree or less and a sliding angle for pure water is 4.0 degrees or less.

6. The article according to claim 1 , wherein the article has a transmittance to light having a wavelength of 400 to 850 nm of 93% or more.

7. The article according to claim 1 , wherein the substrate has an optical power.

8. The article according to claim 1 , wherein the article is an ophthalmic lens.

9. A coating composition, comprising:
(a) a polyhedral oligomeric silsesquioxane represented by the general formula (I);
(b) an acrylate polymer having a structural unit represented by the general formula (II); and
(c) a solvent for dissolving the polyhedral oligomeric silsesquioxane and the acrylate polymer:

where R represents —(CH 2 ) 2 —(CF 2 ) p —CF 3 , and p represents an integer of 0 to 9;

where Ra represents a hydrogen atom or a methyl group, Rf represents —CH 2 —(CF 2 ) q —CF 3 or —CH(CF 3 ) 2 , and q represents an integer of 0 to 8,
wherein the coating comprises the polyhedral oligomeric silsesquioxane at least in the following proportion X:
the proportion X refers to, in “profile where as the proportion of the polyhedral oligomeric silsesquioxane increases, a liquid droplet sliding angle on a surface of a coating film decreases or temporarily increases and then decreases, but a change in the decrease gradually becomes smailler,” a proportion at a starting point at which the change becomes smaller.

10. The coating composition according to claim 9 , wherein the solvent comprises an organic compound containing at least one of chlorine and fluorine.

11. A method of manufacturing a coated article, comprising a coating step of applying the coating composition according to claim 9 to a surface of a substrate and removing the solvent.

12. A method of manufacturing a coated article according to claim 11 , wherein the coating step is carried out at a humidity of 30% RH or less.

13. The method of manufacturing a coated article according to claim 11 , wherein the coating step is carried out under a dehumidified atmosphere.

Assignees

• Nikon Corp
• Essilor Int

Inventors

• Katayama Yukiko

Classifications

• C08G77/045

  containing less than 25 silicon atoms · CPC title

• C08G77/24

  halogen-containing groups · CPC title

• C09D5/1681

  Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect · CPC title

• C09D5/1668

  Vinyl-type polymers · CPC title

• G02B1/041

  Lenses · CPC title