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US 8,563,139 B2Granted
Non-hydrating plaster composition and method
AssigneeUnited States Gypsum Company
InventorLee K. Yeung
Life of this patent
Estimating the term…
Abstract
A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 5-20% by weight of a latex emulsion binder, 40-80% by weight calcium sulfate hemihydrate, 0.05-2% by weight of a set preventer and 20-60% by weight water.
Claims13
A coated panel comprising:
- a building panel;
- and
- a dried coating comprising about 50% to about 93.7% calcium sulfate hemihydrate and a set preventer distributed throughout a latex polymer matrix, wherein said coating is substantially water-free and wherein said set preventer comprises compounds of polyphosphonic acid or esters thereof.
Dependencies are inferred from the claim text.