Granulated hydrophobic additive for gypsum compositions

Details Granulated hydrophobic additive for gypsum compositions Granulated hydrophobic additive for gypsum compositions

2007-12-25

2007-12-25

Moore, Margaret G. (Department: 1712)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S665000, C106S801000, C106S806000, C524S267000

Reexamination Certificate

active

10398327

ABSTRACT:
A hydrophobic gypsum composition is provided which contains gypsum, a granulated hydrophobing additive and a pH effecting additive in an amount sufficient to maintain the pH of the composition in the range of 8 and 12.5, in the presence of water. The granule contains an organopolysiloxane having silicon bonded hydrogen, a water soluble or water dispersible binder, and a carrier, preferably gypsum or a stearate salt, in an amount sufficient to hydrophobe the gypsum. The pH effecting additive is preferably lime but may be any appropriate additive.

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