Quick drying plaster
AssigneeGeorgia-Pacific Gypsum LLC
InventorsAnne H. Ksionzyk, Hubert C. Francis
Life of this patent
Estimating the term…
Abstract
A method for increasing the drying rate of set plaster by adding fatty alcohol sulfate to the slurry of calcium sulfate hemihydrate from which the plaster is made.
Claims22
A method for increasing the drying rate of set plaster prepared by hydrating calcium sulfate hemihydrate in an aqueous slurry, said method comprising introducing fatty alcohol sulfate into the slurry.
A method for increasing the drying rate and decreasing the density of set plaster prepared by hydrating calcium sulfate hemihydrate in an aqueous slurry, said method comprising introducing fatty alcohol sulfate and polyvinyl alcohol into the slurry.
A mixture consisting essentially of gypsum and fatty alcohol sulfate, said mixture forming, upon contact with a quantity of water sufficient to hydrate the gypsum and form a workable slurry, quick drying set plaster.
A mixture consisting essentially of gypsum and fatty alcohol sulfate, and polyvinyl alcohol, said mixture forming, upon contact with a quantity of water sufficient to hydrate the gypsum and form a workable slurry, quick drying set plaster.
Dependencies are inferred from the claim text.