FAST DRYING GYPSUM PRODUCTS

A slurry is made including water, at least 50% by weight calcium sulfate hemihydrate, and a specific polycarboxylate dispersant prepared using at lea st three repeating units. A first repeating unit is a vinyl ether-type repeatin g unit. A second repeating unit includes a maleic acid-type repeating...

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Bibliographic Details
Main Authors WILSON, JOHN W, LETTKEMAN, DENNIS M, SHAKE, MICHAEL P, LIU, QUINGXIA, RANDALL, BRIAN S, BLACKBURN, DAVID R
Format Patent
LanguageEnglish
French
Published 28.12.2006
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:A slurry is made including water, at least 50% by weight calcium sulfate hemihydrate, and a specific polycarboxylate dispersant prepared using at lea st three repeating units. A first repeating unit is a vinyl ether-type repeatin g unit. A second repeating unit includes a maleic acid-type repeating unit. A third repeating unit includes an acrylic acid- type repeating unit. The polymer dispersant has a molecular weight of from about 20,000 to about 80,0 00 Daltons. The slurry made from this composition can be made at reduced water levels to speed drying and reduce drying costs.
Bibliography:Application Number: CA20062608074