Antimicrobial glaze and porcelain enamel via double layer glaze with high zinc content

Patent metadata

Field	Value
Publication number	US-11066338-B2
Application number	US-201916588677-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	May 9, 2005
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A cost-effective and practical antimicrobial glaze system and glazing process is disclosed herein. The antimicrobial glaze/enamel may comprise at least two layers: a base layer and a top layer. The base layer may contain a typical or normal glaze widely used in sanitary ware, having a low level of zinc oxide. The base layer glaze may be directly sprayed on the clay body surface. A thin top glaze layer is sprayed on top of the base glaze layer and the top layer may contain a high level of zinc oxide.

First claim

What is claimed is:

1. Sanitary ware comprising a multilayer antimicrobial ceramic glaze, the ceramic glaze comprising
a base glaze layer containing from 0.0 percent by weight to about 8.0 percent by weight ZnO; and
a top glaze layer containing from about 8.0 percent by weight to about 35.0 weight percent ZnO,
wherein a total ZnO content in the multilayer glaze is less than 5.0 weight percent.

2. The sanitary ware of claim 1 , wherein the top layer contains from about 10.0 weight percent to about 25.0 weight percent ZnO.

3. The sanitary ware of claim 1 , wherein the base layer contains ZnO.

4. The sanitary ware of claim 1 , wherein the base layer contains from about 0.0 weight percent to about 6.0 weight percent ZnO.

5. The sanitary ware of claim 1 , wherein the ceramic glaze is substantially free of surface defects.

6. The sanitary ware of claim 1 , wherein the base glaze layer is from about 300 μm to about 1000 μm thick.

7. The sanitary ware of claim 1 , wherein the base glaze layer is from about 300 μm to about 600 μm thick.

8. The sanitary ware of claim 1 , wherein the top glaze layer is from about 25 μm to about 250 μm thick.

9. The sanitary ware of claim 1 , wherein the top glaze layer is from about 25 μm to about 150 μm thick.

10. The sanitary ware of claim 1 , wherein the top glaze layer is from about 100 μm to about 200 μm thick.

11. The sanitary ware of claim 1 , wherein the top glaze layer is from about 150 μm to about 300 μm thick.

12. The sanitary ware of claim 1 , wherein the top glaze layer is from about 200 μm to about 300 μm thick.

13. The sanitary ware of claim 1 , wherein a top 10 μm of the top glaze layer contains more than 8 weight percent and less than 35.0 weight percent ZnO.

14. The sanitary ware of claim 1 , wherein a top 10 μm of the top glaze layer contains more than 8 weight percent and less than 15.0 weight percent ZnO.

15. The sanitary ware of claim 1 , wherein the top glaze layer includes a source of ions selected from one or more of Hg, Ag, Cu, Fe, Pb, Bi, and rare earths.

16. Sanitary ware comprising a multilayer antimicrobial ceramic glaze, the ceramic glaze comprising
a base glaze layer containing from 0.0 percent by weight to about 8.0 percent by weight ZnO; and
a top glaze layer containing from about 8.0 percent by weight to about 35.0 weight percent ZnO,
wherein a top 10 μm of the top glaze layer contains more than 8 weight percent and less than 35.0 weight percent ZnO.

17. The sanitary ware of claim 16 , wherein a top 10 μm of the top glaze layer contains more than 8 weight percent and less than 15.0 weight percent ZnO.

18. The sanitary ware of claim 16 , wherein the top layer contains from about 10.0 weight percent to about 25.0 weight percent ZnO.

19. The sanitary ware of claim 16 , wherein the base glaze layer is from about 300 μm to about 1000 μm thick.

20. The sanitary ware of claim 16 , wherein the top glaze layer is from about 25 μm to about 300 μm thick.

21. The sanitary ware of claim 16 , wherein a total ZnO content in the multilayer glaze is less than 5.0 weight percent.

Assignees

• Ideal Standard Int Nv
• As America Inc

Inventors

• Chen Zheng
• Mchale James Michael

Classifications

• C04B41/86 Primary

  Glazes; Cold glazes · CPC title

• B32B9/00

  Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title

• B05D1/02

  performed by spraying · CPC title

• C03C8/02

  Frit compositions, i.e. in a powdered or comminuted form · CPC title

• C04B2111/2092

  Resistance against biological degradation · CPC title