Coating composition and method of making and using the same

Patent metadata

Field	Value
Publication number	US-9944822-B2
Application number	US-201013876296-A
Country	US
Kind code	B2
Filing date	Oct 6, 2010
Priority date	Oct 6, 2010
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

The present application is directed to a method of making an article. The method comprises coating a composition to a surface of a substrate. The coating composition comprises an aqueous continuous liquid phase, a silica nano-particle dispersed in the aqueous continuous liquid phase, and a polymer latex dispersion. The coated substrate is then heated to at least 300° C.

First claim

What is claimed is:

1. A method of making an article, the method comprising
providing an aqueous silica nano-particle composition,
providing an alkaline pH stable polymer latex dispersion;
mixing the aqueous silica nano-particle composition with the polymer latex dispersion to create a mixture comprising an aqueous continuous liquid phase comprising at least 50% by weight of water,
adjusting the pH of the mixture to less than 6 to form core-shell particles and create a coating composition,
coating the surface of a substrate with the coating composition;
heating the coated substrate to at least 300° C.,
wherein the coating composition has a pH of less than 6,
wherein the coating composition is capable of regenerating the polymer latex dispersion and the silica nano-particle composition upon raising the pH of the coating composition, and
wherein the coating on the substrate is antireflecting after the heating step.

2. The method of claim 1 wherein the silica nano-particle is a nominally spherical particle.

3. The method of claim 1 wherein the silica nano-particle is an elongated particle.

4. The method of claim 1 wherein the silica nano-particle composition comprises a blend of nominally spherical and elongated silica nano-particles.

5. The method of claim 1 wherein the silica nano-particle is a chain of nominally spherical particles.

6. The method of claim 1 wherein the silica nano-particle is a chain of elongated particles.

7. The method of claim 1 wherein the silica nano-particle is a chain of nominally spherical and elongated particles.

8. The method of claim 1 wherein each core-shell particle comprises a polymer core surrounded by a shell consisting essentially of nonporous nominally spherical silica particles disposed on the polymer core, wherein the nonporous nominally spherical silica particles have a volume average particle diameter of 60 nanometers or less.

9. The method of claim 8 wherein the volume average particle diameter is 20 nanometers or less.

10. The method of claim 1 , wherein the substrate surface comprises a glass panel.

11. The method of claim 10 wherein the glass panel has a flat surface.

12. The method of claim 10 wherein the glass panel has a structured surface.

13. The method of claim 10 comprising adding the coated glass panel to a photovoltaic cell to make a photovoltaic module.

14. The method of claim 1 wherein the coated substrate is heated to at least 400° C.

15. The method of claim 1 wherein the coated substrate is heated to at least 500° C.

16. The method of claim 1 wherein the coated substrate is heated to at least 600° C.

17. The method of claim 1 wherein the coated substrate is heated to at least 700° C.

18. The method of claim 1 wherein the silica nano-particle is nonporous.

Assignees

• Jing Naiyong
• Riddle Justin A
• Yu Zhigang
• Xiong Mingna
• Wang Zhengjun
• Chu Yiwen
• Pan Rui
• Tiers George Van Dyke
• Brown Katherine A
• 3M Innovative Properties Co

Inventors

• Jing Naiyong
• Riddle Justin A
• Yu Zhigang
• Xiong Mingna
• Wang Zhengjun
• Chu Yiwen
• Pan Rui
• Tiers George Van Dyke
• Brown Katherine A

Classifications

• C09D7/1266

  Chemistry & Metallurgy · mapped topic

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• H01L31/02366

  Electricity · mapped topic

• C09D175/04 Primary

  Polyurethanes · CPC title

• C09D5/028

  Pigments; Filters · CPC title