Aqueous dispersions

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/34 (2006.01) C02F 1/56 (2006.01) C08F 2/44 (2006.01) C08F 291/00 (2006.01) C08L 33/14 (2006.01)

Patent

CA 2264803

Aqueous dispersion of polymers is provided which comprises: (a) a first cationic water-soluble or water-swellable polymer; and (b) at least one second water-soluble polymer different from said first polymer; and (c) a kosmotropic salt; and (d) a chaotropic salt, wherein the amounts of said (b), and (d) are such that a homogeneous composition is obtained in the absence of said (b). Process to form an aqueous dispersion. Method for dewatering a suspension of dispersed solids and method to produce clarified water using said dispersion.

L'invention porte sur une dispersion aqueuse de polymères comprenant (a) un premier polymère cationique hydrosoluble ou gonflant en présence d'eau; et (b) au moins un deuxième polymère hydrosoluble différent du premier; et (c) un sel cosmotrope; et (d) un sel chaotrope. Les quantités de (b), (c) et (d) sont telles qu'il est possible d'obtenir une composition homogène en l'absence de (b). L'invention porte également sur un procédé de formation d'une dispersion aqueuse, sur une méthode d'égouttage d'une suspension de solides dispersés, et sur une méthode de production d'eau clarifiée à l'aide de ladite dispersion.

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