Process for preparing an aqueous dispersion of a quaternary...

C - Chemistry – Metallurgy – 08 – F

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C08F 220/18 (2006.01) C08F 2/04 (2006.01) C08F 2/06 (2006.01) C08F 2/10 (2006.01) C08F 220/56 (2006.01)

Patent

CA 2622034

A method of making an ion triggerable cationic polymer by solution copolymerizing one or more vinyl-functional cationic monomers, one or more water insoluble or hydrophobic vinyl monomers with alkyl side chains up to 4 carbons long, and, optionally, a minor amount of one or more vinyl monomers with linear or branched alkyl groups longer than 4 carbons, alkyl hydroxy, polyoxyalkylene, or other functional groups. The solution polymerization is accomplished by free radical polymerization in a mixture of an organic solvent such as acetone and water. After polymerization is complete, the organic solvent is preferably removed by a continuous process. The continuous process is preferably performed using a plate evaporator system.

L'invention concerne un procédé permettant de fabriquer un polymère cationique à déclenchement ionique par la copolymérisation en solution d'un ou plusieurs monomères cationiques à fonction vinyle comprenant des chaînes latérales alkyle d'une longueur jusqu'à 4 carbones et, facultativement, une petite quantité d'un ou plusieurs monomères vinyliques renfermant des groupes alkyle linéaires ou ramifiés d'une longueur supérieure à 4 carbones, alkyle hydroxy, polyoxyalkylène ou d'autres groupes fonctionnels. La polymérisation en solution s'accomplit par polymérisation des radicaux libres dans un mélange de solvant organique tel que de l'acétone et de l'eau. Une fois la polymérisation achevée, on enlève de préférence le solvant organique en un processus continu. Le processus continu s'accomplit de préférence au moyen d'un système évaporateur à plaques.

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