초록 ▼

The present invention provides a new and improved lead-free and cadmium-free glass enamel composition that displays good flow at traditional glass enamel firing temperatures and upon firing produces an enamel finish that displays no cracking, good chemical resistance, good weatherability, and improv

The present invention provides a new and improved lead-free and cadmium-free glass enamel composition that displays good flow at traditional glass enamel firing temperatures and upon firing produces an enamel finish that displays no cracking, good chemical resistance, good weatherability, and improved color values. The glass enamel composition of the present invention includes a glass component, an oxidizer, a pigment system, and optional vehicles and fillers. The presence of the oxidizer in the composition, which can be included as part of the glass component, as a separately added material, or both, improves the color values of the fired enamel as compared to enamels formed using similar glass enamel compositions having no oxidizer present.

대표청구항 ▼

1. A lead-free and cadmium-free glass enamel composition comprising a glass component, an oxidizer, and a pigment system, said glass component comprising from about 28% to about 60% by weight SiO2, from about 9% to about 21% by weight B2O3, up to 15% by weight Na2O, up to about 13% by weight K2O, up

1. A lead-free and cadmium-free glass enamel composition comprising a glass component, an oxidizer, and a pigment system, said glass component comprising from about 28% to about 60% by weight SiO2, from about 9% to about 21% by weight B2O3, up to 15% by weight Na2O, up to about 13% by weight K2O, up to about 6% by weight Li2O, up to about 6% by weight Al2O3, up to about 25% by weight TiO2, from 11% to about 21% by weight ZnO, up to about 20% by weight Nb2O5, up to about 9% by weight Bi2O3, up to about 11% by weight ZrO2, up to about 12% by weight BaO, up to about 8% by weight SrO, up to about 5% by weight CaO, up to about 2% by weight MgO, up to about 5% weight LnOx, where "Ln" is an element selected from the Lanthanide Series, up to about 6% by weight Sb2O3, and up to about 6% by weight fluorine, wherein said oxidizer comprises one or more compounds selected from the group consisting of Sb2O3, NH4NO3, and K2S2O8 and is smelted into said glass component.