Patent ID: 6429161
Filing Date: 2002-08-06
Classification: C03C,C23D,F24C

Abstract:
A porcelain enamel coating composition comprising a glass composition comprising by weight from about 30% to about 55% SiO2, from about 11% to about 20% TiO2, from about 0% to about 10% B2O3, from about 20% to about 40% alkali metal oxides, less than about 5% rare earth metal oxides, from about 0% to about 10% CaO, from about 0% to about 10% BaO, from about 0% to about 10% MnO, from about 2% to about 12% CuO, from about 0% to about 10% Sb2O3, from about 1.5% to about 10% Fe2O3, from about 0% to about 10% SnO2, from about 0% to about 10% P2O5, less than about 2% MoO3, and less than about 5% V2O5, said composition when fired on aluminized steel forming a porous coating layer that exhibits cleanability beyond six cycles in compliance with ISO 8291.