C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/78.5
C04B 16/02 (2006.01) C04B 24/42 (2006.01) C04B 28/14 (2006.01)
Patent
CA 2327430
The present invention discloses a method of increasing the water resistance of a gypsum containing material by including a polymerizable siloxane and Portland Cement as a catalyst in a gypsum slurry, which is then shaped and dried under conditions to promote the polymerization of the siloxane into silicone. The invention also discloses a method of increasing the water resistance of a gypsum containing material by including a polymerizable siloxane and Portland Cement as a catalyst in a hot calcined gypsum slurry that contains host fibers, which is then shaped, dewatered pressed and dryed under conditions to promote the polymerization of the siloxane into silicone.
Company United States Gypsum
Macrae & Co.
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