# US 11,032,876 B2 · Preparation of an article of a glass or a glass-ceramic having an improved coating and that article

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- Number: US 11,032,876 B2
- Document ID: US11032876B2
- Status: Granted
- Kind: B2
- Application number: 16/182,027
- Filed: 2018-11-06
- Published: 2019-03-07
- Granted: 2021-06-08
- Earliest claimed: 2018-11-06
- Assignees: Eurokera
- Applicants: Eurokera
- Inventors: Bruno Dufour; Gaelle Ferriz; David Henry; Philippe Lehuede
- Web page: https://patentgrep.com/patent/US11032876B2

## CPC

- H05B 3/74: Non-metallic plates {, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits}
- C03C 17/007: {containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase}
- C03C 17/34: with at least two coatings having different compositions (C03C17/44 takes precedence)
- C03C 2217/445: Organic continuous phases
- C03C 2217/475: Inorganic materials
- C03C 2217/485: Pigments
- Y10T 428/31612: As silicone, silane or siloxane
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for preparing an article, the structure of which comprises a substrate of a glass or a glass-ceramic and a coating fixed to at least one portion of the surface of the substrate. In a characteristic way, the coating is generated from at least one loaded polysilsesquioxane resin; the at least one polysilsesquioxane resin not containing any aryl radical in its structure.

## Claims

### Claim 1

A cooktop comprising:
a glass or glass-ceramic substrate; and
a coating fixed to at least one portion of a surface of the glass or glass-ceramic substrate, wherein the coating comprises a heat treated dispersion layer, the heat treated dispersion layer comprising:
a continuous phase consisting essentially of at least one polysilsesquioxane resin, the at least one polysilsesquioxane resin having units of formula (RSiO1.5), R being identical or not, all different from an aryl group and being selected from a group consisting of linear and branched alkyl groups having 1 to 6 carbon atoms and cycloalkyl groups having 3 to 6 carbon atoms, wherein the at least one polysilsesquioxane resin is crosslinked; and
a dispersed phase consisting essentially of mineral fillers.

### Claim 2 (depends on 1)

The cooktop of claim 1, wherein the at least one polysilsesquioxane resin has units (RSiO1.5), R being selected from the group consisting of linear and branched alkyl groups having 1 to 3 carbon atoms and cycloalkyl groups having 3 to 6 carbon atoms.

### Claim 3 (depends on 1)

The cooktop of claim 1, wherein at least one fraction of the mineral fillers comprises lamellar fillers.

### Claim 4 (depends on 1)

The cooktop of claim 1, wherein at least one fraction of the mineral fillers comprises pigments.

### Claim 5 (depends on 1)

The cooktop of claim 1, wherein the heat treated dispersion layer is a first heat treated dispersion layer and the coating further comprises a second heat treated dispersion layer, the second heat treated dispersion layer comprising:
a continuous phase consisting essentially of at least one polysilsesquioxane resin, the at least one polysilsesquioxane resin having units of formula (HSiO1.5) and/or of formula (RSiO1.5), R being identical or not, and all different from an aryl group; and
a dispersed phase consisting essentially of mineral fillers.

### Claim 6 (depends on 1)

The cooktop of claim 1, wherein the at least one polysilsesquioxane resin has units (RSiO1.5), R either identical or not, being selected from a group consisting of linear and branched alkyl groups having 2 to 6 carbon atoms.

### Claim 7 (depends on 1)

The cooktop of claim 1, wherein the surface having the layer of the dispersion applied thereon is a first surface and the glass or glass-ceramic substrate of the cooktop further comprises a second surface opposite the first surface, wherein the first surface and the second surface are substantially parallel.

### Claim 8 (depends on 1)

The cooktop of claim 1, wherein the coating further comprises a mineral layer.

### Claim 9 (depends on 1)

The cooktop of claim 1, wherein the at least one polysilsesquioxane resin is a polysilsesquioxane resin with units (CH3SiO1.5).

### Claim 10 (depends on 1)

The cooktop of claim 1, wherein the cooktop is configured to be disposed above one or more heating elements, such that the surface of the glass or glass-ceramic substrate upon which the coating is fixed faces the one or more heating elements.