Partially crystallizing enamel containing crystalline zinc borate seed material
US5677251A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Apr 25, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C8/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ceramic enamel composition is described which contains a zinc-containing oxide frit, a zinc borate seed material, a pigment, and a vehicle. The zinc borate seed material is preferably crystalline in nature, and promotes crystal growth upon firing. A preferred crystalline zinc borate seed material is selected from the phases Zn.sub.3 B.sub.2 O.sub.6 and Zn(BO.sub.2).sub.2, and mixtures thereof. Upon firing and press-forming a glass substrate coated with the enamel, components of the enamel adhere to the substrate while reducing sticking of the coated region to the forming die. The ceramic enamel is particularly useful in providing a colored border around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.