FOAMED SLURRY AND BUILDING PANEL MADE THEREFROM

A gypsum slurry is described that includes water a hydraulic component comprising at least 50% calcined gypsum by weight based on the dry weight of the hydraulic component, foam, a defoamer a polycarboxylate dispersant having olefimc unsaturated mono-carboxylic acid moieties and (poly)oxyalkylene mo...

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Bibliographic Details
Main Authors WITTBOLD, JAMES, R, LI, ALFRED, PETERSEN, BRUCE, LYNN
Format Patent
LanguageEnglish
French
Published 26.02.2009
Subjects
ARTIFICIAL STONE
BUILDING
BUILDING MATERIALS
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
FIXED CONSTRUCTIONS
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
STRUCTURAL ELEMENTS
TREATMENT OF NATURAL STONE
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Summary:A gypsum slurry is described that includes water a hydraulic component comprising at least 50% calcined gypsum by weight based on the dry weight of the hydraulic component, foam, a defoamer a polycarboxylate dispersant having olefimc unsaturated mono-carboxylic acid moieties and (poly)oxyalkylene moieties, a first portion of a retarder and a second portion of a retarder In some embodiments of the invention, the defoamer is combined with the dispersant prior to being added to the gypsum slurry The defoamer and dispersant can be added as a physical mixture, wherein the defoamer is attached onto the dispersant polymer or a combination thereof In some embodiments, a gypsum building panel is made from the gypsum slurry
Bibliography:Application Number: CA20082694162