Gypsum compositions with naphthalene sulfonate and modifiers

C - Chemistry – Metallurgy – 04 – B

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C04B 28/14 (2006.01) B32B 13/00 (2006.01)

Patent

CA 2670942

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

Suspension de gypse améliorée comprenant: eau, hémihydrate de sulfate de calcium, dispersant au sulfonate de naphtalène et modificateur, lequel a une configuration chimique améliorant l'efficacité du dispersant. Les modificateurs préférés sont les suivants: ciment, chaux, chaux éteinte, carbonate de soude, carbonates,silicates et phosphates.

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