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US 2003/0134944 A1Published application
Gypsum layered panels containing styrene butadiene latex additive
AssigneeNational Gypsum Properties, LLC
InventorsGopalakrishnan Sethuraman, W. Roy Burke, Amba Ayambem, Richard J. Romanek
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Abstract
Gypsum wallboard compositions are disclosed which contain functionalized styrene butadiene latex polymers. Methods for the use of the compositions in the manufacture of wallboard panels and sheets is presented.
Claims43
A composition suitable for use in the manufacture of gypsum materials, the composition comprising:
- calcium sulfate hemihydrate;
- water;
- and,
- a functionalized styrene butadiene latex polymer.
1 more element
A gypsum wallboard panel comprising:
- a first cover sheet;
- a second cover sheet;
- and,
- a gypsum wallboard core disposed between the first cover sheet and the second cover sheet, the core comprising calcium sulfate hemihydrate, water, and a functionalized styrene butadiene latex polymer.
1 more element
A method of making a gypsum wallboard, the method comprising:
- forming a slurry comprising calcium sulfate hemihydrate, water, and a functionalized styrene butadiene latex polymer;
- mixing the slurry;
- depositing the slurry onto a first cover sheet;
- and
- applying a second cover sheet atop the deposited slurry.
2 more elements
A composition suitable for use in the manufacture of gypsum materials, the composition comprising:
- calcium sulfate hemihydrate;
- water;
- and
- functionalized styrene butadiene latex polymer particles, wherein the functionalized styrene butadiene latex polymer particles have a median diameter of about 80 nanometers to about 220 nanometers and a gel content of about 15 percent by weight to about 85 percent by weight.
1 more element
Dependencies are inferred from the claim text.