Modifiers for gypsum slurries and method of using them

Details Modifiers for gypsum slurries and method of using them Modifiers for gypsum slurries and method of using them

C - Chemistry, Metallurgy

04

B

C04B 28/14 (2006.01) B32B 1/04 (2006.01) C04B 11/00 (2006.01)

Patent

CA 2607973

An improved gypsum slurry that includes water, calcium sulfate hemihydrate, a polycarboxylate dispersant and a modifier. The modifier is chemically configured to improve the efficacy of the polycarboxylate dispersant. Preferred modifiers include cement, lime, slaked lime, soda ash, carbonates, silicates and phosphates.

La présente invention concerne une suspension épaisse de gypse améliorée qui comprend de l'eau, un hémihydrate de sulfate de calcium, un dispersant polycarboxylate et un additif. Cet additif est chimiquement configuré de façon à améliorer l'efficacité du dispersant polycarboxylate. Des additifs préférés comprennent du ciment, de la chaux, de la chaux aérienne, de la cendre de soude, des carbonates, des silicates des phosphates.

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