Antimicrobial articles with silver-containing alkali silicate coating and methods of making thereof

Patent metadata

Field	Value
Publication number	US-10364181-B2
Application number	US-201515305155-A
Country	US
Kind code	B2
Filing date	Apr 22, 2015
Priority date	Apr 23, 2014
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

An antimicrobial article having a substrate, and a coating on a surface of the substrate. The coating includes a silver-containing alkali silicate. The antimicrobial article has an antimicrobial efficacy of greater than or equal to about 90.0% according to EPA Test Method for Efficacy of Copper Alloy Surfaces as a Sanitizer. The coating may further include at least one of a boron-containing compound and an aluminum-containing compound. A method for forming antimicrobial articles includes coating a substrate with a mixture comprising an alkali silicate; curing the coating at a temperature from greater than or equal to about 300° C. to less than or equal to about 620° C. for a duration of greater than or equal to about 15 minutes to less than or equal to about 120 minutes; and contacting the coating with an antimicrobial medium comprising silver nitrate and an alkali nitrate.

First claim

What is claimed is:

1. An antimicrobial article comprising:
a substrate; and
a coating on a surface of the substrate, the coating comprising a silver-containing alkali silicate,
wherein the antimicrobial article has an antimicrobial efficacy of greater than or equal to about 90.0% according to EPA Test Method for Efficacy of Copper Alloy Surfaces as a Sanitizer.

2. The antimicrobial article according to claim 1 , wherein the substrate is an amorphous substrate.

3. The antimicrobial article according to claim 2 , wherein the substrate is a glass selected from the group consisting of soda lime glass, alkali aluminosilicate glass, alkali-containing borosilicate glass, and alkali aluminoborosilicate glass.

4. The antimicrobial article according to claim 3 , wherein the substrate is chemically strengthened.

5. The antimicrobial article according to claim 1 , wherein the substrate is a crystalline substrate.

6. The antimicrobial article according to claim 1 , wherein the coating has a silica:alkali oxide molar ratio of greater than or equal to about 1.0 and less than or equal to about 50.

7. The antimicrobial article according to claim 1 , wherein the silver-containing alkali silicate is selected from the group consisting of silver-containing sodium silicate, silver-containing potassium silicate, and silver-containing lithium silicate.

8. The antimicrobial article according to claim 1 , wherein the antimicrobial article has a transparency greater than or equal to about 80% at wavelengths from 400 nm to 800 nm.

9. A device comprising the antimicrobial article according to claim 1 .

10. An antimicrobial article comprising:
a substrate; and
a coating on a surface of the substrate, the coating comprising at least one of a silver-containing alkali aluminosilicate and a silver-containing alkali borosilicate,
wherein the antimicrobial article has an antimicrobial efficacy of greater than or equal to about 90.0% according to EPA Test Method for Efficacy of Copper Alloy Surfaces as a Sanitizer.

11. The antimicrobial article according to claim 10 , wherein the coating has a silica:alkali oxide molar ratio of greater than or equal to 1.0 and less than or equal to 40.

12. The antimicrobial article according to claim 10 , wherein the coating comprises the silver-containing alkali aluminosilicate and has an aluminum oxide:alkali oxide molar ratio greater than or equal to about 1.0.

13. The antimicrobial article according to claim 10 , wherein the coating comprises the silver-containing alkali borosilicate and has a boron oxide:alkali oxide molar ratio greater than or equal to about 0.3.

14. The antimicrobial article according to claim 10 , wherein the silver-containing alkali aluminosilicate or the silver-containing alkali borosilicate is selected from the group consisting of silver-containing sodium borosilicate, silver-containing potassium borosilicate, silver-containing lithium borosilicate, silver-containing sodium aluminosilicate, silver-containing potassium aluminosilicate, and silver-containing lithium aluminosilicate.

15. The antimicrobial article according to claim 10 , wherein the antimicrobial article has a transparency greater than or equal to about 80% at wavelengths from 400 nm to 800 nm.

16. A device comprising the antimicrobial article according to claim 10 .

Assignees

• Corning Inc

Inventors

• Borrelli Nicholas Francis
• Senaratne Wageesha
• Wei Ying

Classifications

• C04B41/5024

  Silicates (C04B41/5022 takes precedence; silico-fluorides C04B41/5018) · CPC title

• C03C2217/425

  consisting of a porous layer · CPC title

• C03C17/25 Primary

  by deposition from the liquid phase · CPC title

• C03C2217/23

  Mixtures · CPC title

• C03C2218/113

  by sol-gel processes · CPC title