Armstrong World Industries, Inc.
Face coating for acoustical monolithic ceilings

Abstract:

Described herein is a coated acoustic building material comprising a body comprising a first major surface opposite a second major surface; a coating having an upper surface opposite a lower surface, the lower surface of the coating facing the first major surface of the body, the coating comprising: polymeric binder having a glass transition temperature less than 0.degree. C.; and a filler; wherein the coating is present as coalesced particles atop the first major surface in an amount ranging from about 210 g/m.sup.2 to about 1,300 g/m.sup.2.