Ceramic glaze having antimicrobial property

Patent metadata

Field	Value
Publication number	US-9446980-B2
Application number	US-201313931805-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Feb 20, 2007
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An antimicrobial ceramic glazing composition contains one or more antimicrobial agents disposed therein. Methods for making and using the glazing composition are disclosed, as well as substrates having a fired antimicrobial glaze thereon. The antimicrobial agents comprise metallic oxides, with a subset of the disclosed combinations exhibiting synergistic effect in fired glazes.

First claim

What is claimed is:

1. An antimicrobial ceramic glazing composition, comprising:
a ceramic glaze base adapted to be fired at a firing temperature of from at least about 1062° C.; and
an antimicrobial composition including: a first antimicrobial agent consisting of Ag 2 CO 3 ; and
a second antimicrobial agent that is one of Bi 2 O 3 , CuO or ZnO;
wherein the first antimicrobial agent is present in the glaze composition at a concentration of about 0.5 to about four percent, by weight of glaze composition; and
wherein the second antimicrobial agent is present in the glaze composition at a concentration of from about one percent to about four percent, by weight of glaze composition; and
wherein the glazing composition is adapted to possess an antimicrobial property after a conventional firing process at the firing temperature.

2. The antimicrobial ceramic glazing composition of claim 1 wherein the second antimicrobial agent is Bi 2 O 3 .

3. The antimicrobial ceramic glazing composition of claim 1 wherein the second antimicrobial agent is ZnO.

4. The antimicrobial ceramic glazing composition of claim 1 wherein the first antimicrobial agent and the second antimicrobial agent are present in the glaze composition at substantially equal concentrations.

5. The antimicrobial ceramic glazing composition of claim 1 wherein the concentration of the first antimicrobial agent in the glaze composition is about two percent;
wherein the second antimicrobial agent is one of Bi 2 O 3 , CuO or ZnO.

6. The antimicrobial ceramic glazing composition of claim 1 wherein the concentration of the first antimicrobial agent in the glaze composition is about four percent; and
wherein the second antimicrobial agent is present in the glaze composition at a concentration of about two percent.

7. The antimicrobial ceramic glazing composition of claim 1 wherein the second antimicrobial agent is CuO.

8. A glazed ceramic substrate, comprising:
a ceramic substrate having a first substrate surface; and
a fired antimicrobial ceramic glazing composition disposed on the first substrate surface;
wherein the fired antimicrobial ceramic glazing composition is a post-fired state of an antimicrobial ceramic glazing composition including:
a first antimicrobial agent consisting of Ag 2 CO 3 ; and
a second antimicrobial agent that is one of Bi 2 O 3 , CuO or ZnO;
wherein the first antimicrobial agent is present in the glaze composition at a concentration of about 0.5 to about four percent, by weight of glaze composition; and
wherein the second antimicrobial agent is present in the glaze composition at a concentration of from about one percent to about four percent, by weight of glaze composition.

9. The glazed ceramic substrate of claim 8 wherein the second antimicrobial agent is Bi 2 O 3 .

10. The glazed ceramic substrate of claim 8 wherein the second antimicrobial agent is CuO.

11. The glazed ceramic substrate of claim 8 wherein the second antimicrobial agent is ZnO.

12. The glazed ceramic substrate of claim 8 wherein the concentration of the first antimicrobial agent is about two percent and the second antimicrobial agent is one of Bi 2 O 3 , CuO or ZnO.

13. The glazed ceramic substrate of claim 8 wherein the concentration of the first antimicrobial agent is about four percent and the second antimicrobial agent is one of Bi 2 O 3 , CuO or ZnO.

Assignees

• Microban Products

Inventors

• Campbell Jr Alvin Lamar

Classifications

• A01N59/16 Primary

  Heavy metals; Compounds thereof · CPC title

• A01N25/08

  containing solids as carriers or diluents · CPC title

• A61K33/30

  Zinc; Compounds thereof · CPC title

• A61K33/245

  Bismuth; Compounds thereof · CPC title

• C04B41/86

  Glazes; Cold glazes · CPC title