Back to results
US 2014/0178624 A1Published application
Base-mediated hydrophobing compositions and processes
AssigneeGeorgia-Pacific Gypsum LLC
InventorRobert William Tilford
Life of this patent
Estimating the term…
Abstract
Water-resistant gypsum boards and compositions and methods for their manufacture are provided. The methods include forming a mixture of water, hydroxide, and siliconate, adding siloxane to the mixture, adding calcium sulfate hemi-hydrate to the mixture to form an aqueous slurry, curing the aqueous slurry under heat, drying the aqueous slurry, and forming a water-resistant gypsum board.
Claims20
A method for making a water-resistant gypsum board, comprising:
- forming a mixture of water and hydroxide;
- adding siloxane to the mixture;
- adding calcium sulfate hemi-hydrate to the mixture to form an aqueous slurry;
- curing the aqueous slurry under heat;
- drying the aqueous slurry;
- and
- forming a water-resistant gypsum board.
4 more elements
A composition for the manufacture of gypsum board, comprising:
- calcium sulfate hemi-hydrate;
- siloxane;
- and
- hydroxide.
1 more element
A water-resistant gypsum board, comprising:
- a gypsum core that comprises a mixture of calcium sulfate hemi-hydrate, siloxane, and hydroxide;
- and
- a fibrous mat at least partially penetrating a surface of the gypsum core.
Dependencies are inferred from the claim text.