Flame retardant clear coatings for building panels
AssigneeAWI Licensing LLC
InventorsJohn E. Hughes, Suzanne M. Huntzinger
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Abstract
The present invention is directed to a flame-retardant building panel comprising a body having a first major surface opposite a second major surface, an inorganic coating atop the first major surface, the inorganic coating comprising a flame retardant component that includes a phosphate compound, and a metal complexing agent. In other aspect, the invention is a method of forming a flame-retardant building panel comprising: a) applying an inorganic coating composition to a major surface of a body; and b) drying the inorganic coating composition at an elevated temperature.
Claims20
A flame-retardant building panel comprising:
- a body comprising a cellulosic layer, the body having a first major surface opposite a second major surface, and the first major surface of the body comprising the cellulosic layer;
- an inorganic coating atop the first major surface, the inorganic coating comprising a flame retardant component that includes:
- a phosphate compound;
- a borate compound comprising boron trioxide;
- a filler comprising calcium carbonate, aluminum carbonate, magnesium carbonate, and fumed silica;
- a cross-linker comprising triethanolamine;
- and
- a metal complexing agent;
- wherein the phosphate compound and the metal complexing agent are present in a weight ratio ranging from about 50:1 to about 200:1;
- and
- wherein the inorganic coating has a curing temperature ranging from about 225° F. to about 275° F.
A flame-retardant building panel comprising:
- a body comprising a cellulosic layer, the body having a first major surface opposite a second major surface, and the first major surface of the body comprising the cellulosic layer;
- an inorganic coating applied to the first major surface, the inorganic coating formed from a composition comprising a flame retardant blend that includes:
- a phosphate compound;
- a borate compound comprising boron trioxide;
- a filler comprising three or more of calcium carbonate, aluminum carbonate, lithium carbonate, magnesium carbonate, fumed silica, and aluminum oxide;
- and
- a metal complexing agent;
- wherein the flame retardant blend is present in an amount ranging from about 40 wt. % to about 80 wt. % based on the total weight of the inorganic coating;
- and
- wherein the inorganic coating has a curing temperature ranging from about 225° F. to about 275° F.
A flame-retardant building panel comprising:
- a body having a first major surface opposite a second major surface, the body comprising
- a veneer layer having an upper surface opposite a lower surface;
- an adhesive layer having an upper surface opposite a lower surface;
- and
- a substrate layer having an upper surface opposite a lower surface;
- an inorganic coating atop the first major surface, the inorganic coating comprising a flame retardant component that includes:
- a phosphate compound;
- a borate compound comprising boron trioxide;
- and
- a metal complexing agent comprising iron;
- wherein the phosphate compound and the metal complexing agent are present in a weight ratio ranging from about 50:1 to about 200:1;
- wherein the first major surface of the body comprises the upper surface of the veneer layer;
- and
- wherein the inorganic coating has a curing temperature ranging from about 225° F. to about 275° F.
Dependencies are inferred from the claim text.