Anionic polymer products and processes

Details Anionic polymer products and processes Anionic polymer products and processes

C - Chemistry, Metallurgy

08

F

C08F 20/04 (2006.01) C02F 1/14 (2006.01) C02F 1/56 (2006.01) C02F 11/12 (2006.01) C08F 2/10 (2006.01) D21H 21/10 (2006.01) D21H 17/43 (2006.01)

Patent

CA 2313544

Aqueous dispersions of anionic water-soluble or water-swellabte polymers are provided, where the polymers have an anionic charge of greater than 16 % and where the dispersions maintain their form at a pH of 5.1 or greater. Processes for making these dispersions are also disclosed, as well as methods of using these dispersions to treat water containing various types of suspended materials. Dry polymers, preferably formed by drying these aqueous dispersions, are also disclosed.

L'invention concerne des dispersions aqueuses de polymères anioniques solubles dans l'eau ou gonflables dans l'eau. Ces polymères présentent une charge anionique supérieure à 16 % et ces dispersions maintiennent leur forme à un pH supérieur ou égal à 5,1. L'invention concerne également des procédés de préparation de ces dispersions, ainsi que des méthodes d'utilisation de ces dispersions pour traiter de l'eau contenant divers types de matières en suspension. L'invention concerne, en outre, des polymères anhydres formés, de préférence, par séchage de ces dispersions aqueuses.

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