Application of polymethylhydrogen siloxane for producing a...

C - Chemistry – Metallurgy – 04 – B

Patent

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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.

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