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US 6,525,116 B2Granted
Gypsum composition with ionic styrene butadiene latex additive
AssigneeNational Gypsum Properties, LLC
InventorsGopalakrishnan Sethuraman, W. Roy Burke, Amba Ayambem
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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.
Claims42
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 crosslinked by a dimethacrylate having from 2 to 30 ethoxy units between methacrylate functionalities.
1 more element
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 and wherein the functionalized styrene butadiene latex polymer is crosslinked by a dimethacrylate having from 2 to 30 ethoxy units between methacrylate functionalities.
1 more element
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 crosslinked by a dimethacrylate having at least four ethoxy units between methacrylate functionalities.
1 more element
Dependencies are inferred from the claim text.