Partially crystallizing enamel containing crystalline zinc...

Details Partially crystallizing enamel containing crystalline zinc... Partially crystallizing enamel containing crystalline zinc...

C - Chemistry, Metallurgy

03

C

C03C 8/16 (2006.01) C03C 8/04 (2006.01) C03C 17/22 (2006.01)

Patent

CA 2203467

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 Zn3B2O6 and Zn(BO2)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.

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