Glass or glass ceramic substrate provided with a decorative coating and method for producing same

• US 10,308,548 B2
• Filed: 10/20/2014
• Issued: 06/04/2019
• Est. Priority Date: 04/20/2012
• Status: Active Grant

• Current Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Original Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Inventors: Knoche, Silke, Milanovska, Angelina, Klippe, Lutz, Hoffmann, Ulf, Ruhl, Ella
• Primary Examiner(s): Zhao, Xiao S
• Application Number:
  US14/518,456
• Publication Number:
  US 20150037539A1
• Time in Patent Office: 1,688 Days
• CPC Class Codes: B05D 1/36 Successively applying liquids or other fluent materials, e.g. without intermediate treatment
• CPC Class Codes: B05D 5/06 to obtain multicolour or other optical effects B05D5/02 takes precedence
• CPC Class Codes: B05D 7/52 Two layers
• CPC Class Codes: C03C 17/008 comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
• CPC Class Codes: C03C 17/32 with synthetic or natural resins C03C17/30 takes precedence
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C03C 2217/425 consisting of a porous layer
• CPC Class Codes: C03C 2217/485 Pigments
• CPC Class Codes: C03C 2217/72 Decorative coatings
• CPC Class Codes: C03C 2218/36 Underside coating of a glass sheet
• CPC Class Codes: F24C 15/02 Doors specially adapted for stoves or ranges
• CPC Class Codes: F24C 15/10 Tops, e.g. hot plates; Rings cover lids or splash guards F24C15/12; spillage trays or grooves F24C15/14
• CPC Class Codes: Y10T 428/24364 with transparent or protective coating

Abstract

Glass or glass ceramic substrates are provided that have a decorative coating. Methods for coating a glass or glass ceramic substrate with a decorative coating are also provided. In the method, a first, textured layer is applied which is filled with a further layer, so that a layer material of graded composition is formed.

Claims

1. A method for applying a decorative coating to a glass or glass ceramic substrate, comprising the steps of:

applying a first layer and baking the first layer at a temperature so that cracks arise, the first layer having a textured surface, wherein the first layer is applied as a glass flux and wherein the first layer includes pigment particles; and

applying a second layer onto the first layer, wherein the second layer fills the textured surface at least partially, so that material of the first layer merges into material of the second layer.

2. The method as in claim 1, wherein the first layer is baked, whereby the glass flux particles melt while the pigment particles remain intact.

3. The method as in claim 2, wherein the pigment particles are embedded by the glass flux.

4. The method as in claim 1, wherein the material of the second layer comprises pigments or colorants.

5. The method as in claim 4, wherein the material of the first or second layer comprises pigments in a proportion of more than 50% in percent by weight.

6. The method as in claim 1, wherein at least the first layer comprises metal oxide particles as the pigment particles and a further inorganic material.

7. The method as in claim 1, wherein at least the first layer comprises pigment particles having of a mean particle size of more than 0.25 μ

m.

8. The method as in claim 1, wherein the second layer is an at least partially polymeric layer.

9. The method as in claim 8, wherein the partially polymeric layer is select from the group consisting of a polysiloxane, polysilsesquioxane, polyurethane, epoxy-functionalized silicone resin, polyester-functionalized silicone resin, and a sol-gel.

10. The method as in claim 1, wherein the first layer applied has a maximum texture depth from 0.1 to 5 μ

m.

11. The method as in claim 10, wherein the maximum texture depth of the first layer is more than 40% of the maximum thickness of the first layer.

12. The method as in claim 1, wherein the first layer applied is a layer having a closed porosity of less than 30 %.

13. The method as in claim 1, wherein the first layer is baked at a temperature of more than 500°

C.

14. The method as in claim 1, wherein the pigment particles are added to the material of the first layer.

15. The method as in claim 1, wherein the first and second layers exhibit a lightness L in the Lab color space of more than 29.0 when individually applied, and wherein the first and second layers exhibit a lightness L of less than 28.0.

16. The method as in claim 1, wherein the step of applying the first layer comprises applying the first layer to a further textured layer so that the further textured layer is below the first layer.

17. The method according to claim 1, wherein the first layer includes filler particles.

18. A method for applying a decorative coating to a glass or glass ceramic substrate, comprising the steps of:

applying a first layer and baking the first layer at a temperature so that cracks arise, the first layer having a textured surface, wherein the first layer is applied as a glass flux and wherein the first layer includes filler particles; and

applying a second layer onto the first layer, wherein the second layer fills the textured surface and cracks at least partially so that material of the first layer merges into material of the second layer.

19. A method for applying a decorative coating to a glass or glass ceramic substrate, comprising the steps of:

applying to the substrate a glass flux including pigment particles and/or filler particles;

baking the glass flux including the pigment particles and/or filler particles to form a first layer having a closed porosity of less than 5% and a textured surface; and

applying a second layer onto the first layer so that the second layer fills the textured surface and fills any cracks produced in the first layer by the baking so that material of the first layer merges into material of the second layer.