Coated glass sheet
AssigneeAgc Glass Europe
InventorEugenie Peyroux
Life of this patent
Estimating the term…
Abstract
The present invention concerns a process to increase the mechanical and chemical resistance of a hydrolyzable network-forming silica gel coating provided on the surface of a substrate. According to the invention, a coating composition comprising a hydrolyzable, network-forming silica gel doped with a precursor of bismuth or cerium oxide is applied on the surface of the substrate. The present invention concerns also the product obtained by the said process.
Claims16
A process to increase the mechanical and chemical resistance of a hydrolyzable network-forming silica gel coating on a surface of a glass sheet, the process comprising:
- forming a low-e undercoating by PVD on the surface;
- applying a coating composition comprising a hydrolyzable, network-forming silica gel doped with a precursor of bismuth or cerium oxide to the surface comprising the undercoating, and
- subsequently heat treating the glass sheet at a temperature of from 530° C. to 730° C. or chemically tempering the glass sheet,
- wherein the hydrolyzable, network-forming silica gel doped with a precursor of bismuth or cerium oxide is a topmost coating throughout the heat treating.
A process for forming a coated glass sheet, comprising:
- forming a low-e PVD undercoating on the glass sheet;
- applying a coating composition comprising a hydrolyzable, network-forming silica gel doped with a precursor of bismuth oxide on the PVD undercoating, and
- subsequently heat treating the glass sheet at a temperature of from 530° C. to 730° C. or chemically tempering the glass sheet,
- wherein the precursor of bismuth is present between 0.4 to 5%, based on the percentage in weight of the coating.
Dependencies are inferred from the claim text.