Patent ID: 6214414
Filing Date: 2001-04-10
Classification: C03C

Abstract:
A method comprising heating to elevated temperature a ceramic substrate having thereon a sequence of coatings of pigmented coating compositions wherein each of said pigmented coating compositions comprises:(a) reactive organic resin which is polyhydroxy-functional, polyepoxy-functional, or both epoxy-functional and hydroxy-functional;(b) reactive wax;(c) color-imparting pigment; and(d) blocked polyisocyanate;wherein:(e) the pigmented coating composition of at least is one coating of the sequence is substantially free of amino-functional curing agent; and(f) the pigmented coating composition of at least one other coating of the sequence further comprises amino-functional curing agent;to crosslink all of the pigmented coating compositions of the coatings of the sequence and to adhere the sequence to the ceramic substrate.