Abstract: A method of producing gypsum building board, comprises allowing a layer of an aqueous gypsum slurry to set so as to form a board, in which the improvement comprises mixing the gypsum slurry with an aqueous foam produced by foaming water containing at least one non-ionic alkylpolysaccharide foaming agent of the general formula (I) R—O-(G)x??(I) where: R represents a linear or branched alkyl group having from 6 to 20 carbon atoms; G represents a reducing saccharide moiety connected to R via an ethereal O-glycosidical bond; and x is 1 to 10.
Type:
Grant
Filed:
August 28, 2007
Date of Patent:
July 10, 2012
Assignee:
BPB Ltd.
Inventors:
Nathalie Agnes Gaillard, Emmanuel Henri Constant Geeraert
Abstract: A method of producing gypsum building board, comprises allowing a layer of an aqueous gypsum slurry to set so as to form a board, in which the improvement comprises mixing the gypsum slurry with an aqueous foam produced by foaming water containing at least one non-ionic alkylpolysaccharide foaming agent of the general formula (I) R—O-(G)x ??(I) where: R represents a linear or branched alkyl group having from 6 to 20 carbon atoms; G represents a reducing saccharide moiety connected to R via an ethereal O-glycosidical bond; and x is 1 to 10.
Type:
Application
Filed:
August 28, 2007
Publication date:
February 25, 2010
Applicant:
BPB Ltd.
Inventors:
Nathalie Agnes Gaillard, Emmanuel Henri Constant Geeraeart
Abstract: A method of imparting water repellency to a gypsum-based product formed from a plaster-based composition, includes adding to the composition at least one compound including a polysiloxane and at least one compound comprising a pregelled starch. A hydrophobicized, plaster-based composition including a polysiloxane and at least one compound comprising a pregelled starch, and its uses are also disclosed.