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US 6,953,626 B2Granted
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.
Claims12
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 crosslinked by a dimethacrylate having from 2 to 30 ethoxy units between methacrylate functionalities.
1 more element
Dependencies are inferred from the claim text.