Coating for gypsum board face with uniform gloss intensity
AssigneeUnited States Gypsum Company
InventorsSubhash Deodhar, Tom Haugeberg, Robert Negri
Life of this patent
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Abstract
A coating for gypsum board includes a binder, a soy protein, and two or more pigments. Two of the pigments include calcium carbonate and magnesium carbonate and the magnesium carbonate makes up at least 20% by weight of the coating on a dry basis.
Claims20
A coating for gypsum board comprising a binder, a soy protein, and two or more pigments, wherein two of said pigments comprise calcium carbonate and magnesium carbonate, and wherein said magnesium carbonate comprises at least 20% by weight of said coating on a dry basis.
A method of coating a gypsum board comprising the steps of:
- preparing a coating composition comprising a coating and water, said coating comprising a binder, a soy protein, and two or more pigments, wherein two of said pigments comprise calcium carbonate and magnesium carbonate, and wherein magnesium carbonate comprises at least 20% by weight of said coating on a dry basis;
- and
- applying said coating composition to a gypsum board.
A coated gypsum board comprising
- a gypsum core;
- paper facing on one or more sides of said gypsum core;
- and
- a coating composition comprising water and a coating, said coating comprising a binder, a soy protein, and two or more pigments, wherein two of said pigments comprise calcium carbonate and magnesium carbonate, wherein magnesium carbonate comprises at least 20% by weight of said coating on a dry basis, and wherein said coating composition is applied in excess of about 10 pounds per thousand square feet (49.0 g/m2) on a dry basis to said paper on at least one side.
Dependencies are inferred from the claim text.