Armstrong World Industries, Inc.
Flame retardant clear coatings for building panels

Abstract:

The present invention is directed to flame-retardant building panels comprising a body having a first major surface opposite a second major surface; an inorganic coating atop the first major surface, the inorganic coating being optically transparent and flame retardant and comprising a blend of a borate compound and a phosphate compound, and wherein the inorganic flame retardant coating is substantially transparent such that the first major surface of the body is visible through the inorganic coating.