Abstract: The present invention is directed to a gypsum panel with enhanced fire resistance properties and a method of making such gypsum panel. In one embodiment, the gypsum panel comprises a gypsum core, a fire resistance composition, a first facing material, and a second facing material. The fire resistance composition may include phosphorus, nitrogen, boron, or a combination thereof. The weight ratio of phosphorus to nitrogen may be 40-95:0-50. The weight ratio of phosphorus to boron may be 40-95:0-10. The methods of the present invention are directed to making the aforementioned gypsum panels.

Abstract: The present invention is directed to an improved gypsum board, such as an improved sound damping gypsum board, and a method of making such gypsum board. For instance, the method comprises: providing a first encasing layer and a first sound damping layer on the first encasing layer wherein the sound damping layer includes at least 50 wt. % of a first sound damping polymer; depositing a gypsum slurry comprising stucco and water on the sound damping layer to form a gypsum core; providing a second encasing layer on the gypsum slurry; and allowing the stucco to convert to calcium sulfate dihydrate.

Abstract: The present invention is directed to an improved gypsum board, such as an improved sound damping gypsum board. The gypsum board comprises a gypsum core including gypsum and a sound damping polymer. The gypsum core includes a first gypsum layer surface and a second gypsum layer surface opposing the first gypsum layer surface. In addition, a first encasing layer is disposed on the first gypsum layer surface and a second encasing layer is disposed on the second gypsum layer surface.

Abstract: The present disclosure is directed to a gypsum panel and a method of making such gypsum panel. For instance, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and an acetate polymer. The acetate polymer is present in an amount of less than 1 wt. % based on the weight of the gypsum. The gypsum panel exhibits a nail pull resistance of at least about 70 lbf when tested in accordance with ASTM C1396-17. The method of the present disclosure is directed to making the aforementioned gypsum panel by providing the first facing material, providing a gypsum slurry comprising gypsum, water, and an acetate polymer onto the first facing material, wherein the acetate polymer is present in an amount of less than 1 wt. % based on the weight of the stucco, and providing a second facing material on the gypsum slurry.

Abstract: The present invention is directed to a plaster composition with a reduced carbon footprint and a method of making and using such plaster composition. In one aspect, the plaster composition may include a workability composition and a binder. When hydrated with water, a hydrated plaster composition may have enhanced workability, enhanced surface texture, enhanced finish, and may have a reduced carbon footprint as compared to a traditional plaster composition.

Abstract: Provided are cementitious panel that include a swellable material within a core layer, a dense layer, and/or a sheet of facing material that make up a cementitious panel, as well as methods of manufacturing such cementitious panels that include a swellable material and methods of providing a moisture or water barrier in a cementitious panel.

Abstract: The present invention is directed to a gypsum board and a method of making such gypsum board. For instance, the gypsum board comprises a gypsum core, a first facing material, and a second facing material wherein the first facing material and the second facing material sandwich the gypsum core. The gypsum core comprises a first gypsum core section and a second gypsum core section each comprising gypsum, wherein the first gypsum core section comprises a polyol compound and has a density higher than a density of the second gypsum core section.

Abstract: The present invention is directed to a gypsum panel with an enhanced gypsum core to facing material bond and a method of making such gypsum panel. In one embodiment, the gypsum panel comprises a gypsum core, a first facing material, and a second facing material. The first facing material and/or the second facing material having a nucleating composition applied to a surface thereof. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry onto the first facing material, providing a second facing material on the gypsum slurry, and providing a nucleating composition on the first facing material before depositing the gypsum slurry onto the first facing material, on the gypsum slurry before providing the second facing material on the gypsum slurry, on the second facing material before providing the second facing material on the gypsum slurry, or a combination thereof.

Abstract: Provided are cementitious panel that include a swellable material within a core layer, a dense layer, and/or a sheet of facing material that make up a cementitious panel, as well as methods of manufacturing such cementitious panels that include a swellable material and methods of providing a moisture or water barrier in a cementitious panel.

Abstract: Gypsum board having improved performance is obtained by controlling the distribution of starch in the gypsum core of the board and the gelling temperature of the starch. Starch migration in the board is controlled by the degree of acid-modification, to adjust the starch viscosity profile. The starch gelling temperature is controlled by chemical modification of the starch —OH groups.

Abstract: The present invention is directed to a gypsum panel with reduced water usage and a method of making such gypsum panel. For instance, in one aspect, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and a water reduction agent. The methods of the present invention are directed to making the aforementioned gypsum panels. For instance, a method may include providing the first facing material, providing a gypsum slurry comprising gypsum, water, and a water reduction agent onto the first facing material, and providing a second facing material on the gypsum slurry.

Abstract: The present invention is directed to a gypsum board and a method of making such gypsum board. For instance, the gypsum board comprises a gypsum core, a first facing material, and a second facing material wherein the first facing material and the second facing material sandwich the gypsum core. The gypsum core comprises a first gypsum core section and a second gypsum core section each comprising gypsum, wherein the first gypsum core section comprises a polyol compound and has a density higher than a density of the second gypsum core section.

Abstract: The present disclosure is directed to a method of manufacturing gypsum board as well as the resulting gypsum board. The method comprises providing a gypsum slurry with a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. As a result, the gypsum board includes gypsum and a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. The gypsum board exhibits an area shrinkage of less than 20%.

Abstract: Gypsum board having improved performance is obtained by controlling the distribution of starch in the gypsum core of the board and the gelling temperature of the starch. Starch migration in the board is controlled by the degree of acid-modification, to adjust the starch viscosity profile. The starch gelling temperature is controlled by chemical modification of the starch —OH groups.

Abstract: The present invention is directed to a gypsum panel with reduced calcination and a method of making such gypsum panel. For instance, in one embodiment, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and a calcination inhibitor. The methods of the present invention are directed to making the aforementioned gypsum panels.

Abstract: The present invention is directed to a gypsum panel and a method of making such gypsum panel. For instance, in one embodiment, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and one or more components of a reclaim gypsum panel, such as reclaimed gypsum and reclaimed facing material. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry comprising gypsum, water, and one or more components of a reclaim gypsum panel, such as reclaimed gypsum and reclaimed facing material, onto the first facing material, and providing a second facing material on the gypsum slurry.

Abstract: The present disclosure is directed to a method of manufacturing gypsum board as well as the resulting gypsum board. The method comprises providing a gypsum slurry with a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. As a result, the gypsum board includes gypsum and a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. The gypsum board exhibits an area shrinkage of less than 10%.

Abstract: In general, the present invention is directed to the use of particular phosphorus containing compounds for making a gypsum board. The phosphorus containing compound may be a phosphite or a phosphate having a certain formula. In this regard, the present invention is directed to a slurry for making a gypsum board wherein the slurry includes such phosphorus containing compound. The present invention is also directed to a method of making a gypsum board from the slurry as well as a resulting gypsum board.

Abstract: The present invention is directed to a method of determining a free moisture content and/or a degree of calcination of a gypsum panel.

Abstract: The present invention is directed to a gypsum panel and a method of making such gypsum panel. For instance, in one embodiment, the gypsum panel comprises a gypsum core and a first facing material and a second facing material sandwiching the gypsum core, wherein the gypsum core includes gypsum and one or more fire resistance additives. The methods of the present invention are directed to making the aforementioned gypsum panels by providing the first facing material, providing a gypsum slurry comprising gypsum, water, and one or more fire resistance additives onto the first facing material, and providing a second facing material on the gypsum slurry.