Coated glass or glass ceramic substrate, coating comprising closed pores, and method for coating a substrate

Patent metadata

Field	Value
Publication number	US-11420901-B2
Application number	US-202016881690-A
Country	US
Kind code	B2
Filing date	May 22, 2020
Priority date	Nov 22, 2017
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

Coated glass or glass ceramic substrates having high temperature resistance, high strength, and a low coefficient of thermal expansion. The coating includes pores, is fluid-tight and suitable for coating a temperature-resistant, high-strength glass or glass ceramic substrate with a low coefficient of thermal expansion, and to a method for producing such a coated substrate.

First claim

What is claimed is:

1. A coated glass or glass ceramic substrate, comprising:
a substrate; and
a coating on the substrate, the coating having closed pores with a size between 0.1 μm and 30 μm, the coating being a barrier against ingress and passage of fluids,
wherein the coating comprises at least 95 wt % of inorganic constituents and has a thickness between 1.5 μm and 50 μm, and
wherein the coating is a foamed enamel coating.

2. The coated glass or glass ceramic substrate of claim 1 , wherein the coating is temperature resistant for temperatures greater than 400° C.

3. The coated glass or glass ceramic substrate of claim 1 , wherein the substrate is a sheet-like substrate having a thickness between at least 1 mm and at most 10 mm.

4. The coated glass or glass ceramic substrate of claim 1 , wherein the substrate is a sheet-like substrate having a thickness between at least 2 mm and at most 4 mm.

5. The coated glass or glass ceramic substrate of claim 1 , wherein the substrate has a user facing side and a non-user facing side, the coating being disposed on the non-user facing side.

6. The coated glass or glass ceramic substrate of claim 1 , wherein the coating is on the substrate in a laterally patterned form so that at least one portion of the substrate remains free of the coating.

7. The coated glass or glass ceramic substrate of claim 1 , wherein the coating comprises colorants and/or effect agents.

8. The coated glass or glass ceramic substrate of claim 1 , wherein the coating comprises a color pigment and/or an effect pigment.

9. The coated glass or glass ceramic substrate of claim 1 , wherein the coating comprises IR-reflecting pigments, the IR-reflecting pigments having a total solar reflectance value of at least 20%, as determined according to ASTM G 173, and wherein the coating exhibits, for a wavelength of 1500 nm, a remission of at least 35%, as measured according to ISO 13468.

10. The coated glass or glass ceramic substrate of claim 9 , wherein the coating exhibits, in a wavelength range from 1500 nm to 2500 nm, a remission of at least 35%, as measured according to ISO 13468.

11. The coated glass or glass ceramic substrate of claim 9 , wherein the remission, at the wavelength of 1500 nm, is at least 45%.

12. The coated glass or glass ceramic substrate of claim 9 , wherein the IR-reflecting pigments comprise particles with a size distribution having a d50 value in a range from 0.5 μm to 2 μm.

13. The coated glass or glass ceramic substrate of claim 9 , wherein the IR-reflecting pigments include particles having a specific surface area in a range from 1.1 to 8 m 2 /g.

14. The coated glass or glass ceramic substrate of claim 9 , wherein the IR-reflecting pigments are selected from a group consisting of chromium containing iron oxide, a chromium containing hematite, a chromium containing spinel, and any combinations thereof.

15. The coated glass or glass ceramic substrate of claim 1 , wherein the substrate is selected from a group consisting of a soda-lime glass, a borosilicate glass, a toughened soda-lime glass, and a toughened borosilicate glass.

16. The coated glass or glass ceramic substrate of claim 1 , wherein, in a temperature range from 20° C. to 700° C., the substrate and the coating coefficient of thermal expansions do not differ from one another by more than 4*10 −6 /K.

17. The coated glass or glass ceramic substrate of claim 9 , wherein the inorganic constituents comprise a glass matrix comprises 8 to 70 wt % of bismuth oxide and/or 0.1 to 70 wt % of zinc oxide.

18. The coated glass or glass ceramic substrate of claim 9 , wherein the inorganic connstituents comprise a glass matrix that has a glass composition, in wt %:

SiO 2
30-75,

Al 2 O 3
0-25,

B 2 O 3
0-30,

Li 2 O
0-12,

Na 2 O
0-25,

CaO
0-12,

MgO
0-9,

BaO
0-27,

SrO
0-4,

ZnO
0-35,

Bi 2 O 3
0-5,

TiO 2
0-10,

ZrO 2
0-7,

As 2 O 3
0-1,

Sb 2 O 3
0-1.5,

F
0-3,

Cl
0-1, and

H 2 O
0-3.

19. The coated glass or glass ceramic substrate of claim 9 , wherein the inorganic constituents comprise a glass matrix that has a glass composition, in wt %:

SiO 2
6-65,

Al 2 O 3
0-20,

B 2 O 3
0-40,

Li 2 O
0-12,

Na 2 O
0-18,

K 2 O
0-17,

CaO
0-17,

MgO
0-12,

BaO
0-38,

SrO
0-16,

ZnO
0-70,

TiO 2
0-5,

ZrO 2
0-5,

Assignees

• Schott Ag

Inventors

• Menke-Berg Yvonne
• Mangold Stephanie
• Bockmeyer Matthias
• Steigenberger Vera
• O'Ryan Adam
• Moose Matthew
• Schwall Michael

Classifications

• C03C8/06

  containing halogen · CPC title

• C03C10/0027

  containing SiO2, Al2O3, Li2O as main constituents · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C03C2217/452

  Glass · CPC title

• C03C17/008

  comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28 · CPC title