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MAKING GYPSUM BOARD COMPRISING ADDING AN AQUEOUS SILOXANE EMULSION TO AN AQUEOUS SLURRY OF A CALCIUM SULFATE MATERIAL AND HOST PARTICLES
MAKING GYPSUM BOARD COMPRISING ADDING AN AQUEOUS SILOXANE EMULSION TO AN AQUEOUS SLURRY OF A CALCIUM SULFATE MATERIAL AND HOST PARTICLES
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机译:制作石膏板,其中将硅氧烷水乳液与硫酸钙材料和主体颗粒的浆液混合在一起
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摘要
A process is described for making a gypsum board having improved water resistance. The resulting gypsum board products are also described. The process comprises adding an aqueous siloxane emulsion to an aqueous slurry of a calcium sulfate material and host particles, where the siloxane emulsion is stable under the condition in which the slurry is maintained. The process further includes passing said siloxane containing slurry onto a flat porous forming surface to form a filter cake; removing a substantial portion of the water from the filter cake through the porous surface; pressing the filter cake to form a board and remove additional water; and drying the board to remove the remaining free water and to cause the core of the board to reach a temperature sufficient to cure the siloxane.
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