Patent ID: 6825250
Filing Date: 2004-11-30
Classification: C08F,C08L

Abstract:
Process of reducing the amount of fluorinated emulsifier in an aqueous fluoropolymer dispersion, comprising:(a) mixing the aqueous fluoropolymer dispersion with an effective amount of a surfactant so as to stabilize the fluoropolymer dispersion while being contacted with the anion exchange resin; (b) contacting the aqueous fluoropolymer dispersion with an anion exchange resin in a non-fixed resin bed by agitating the aqueous fluoropolymer dispersion with an effective amount of anion exchange resin for a time of less than 4 hours to reduce the amount of fluorinated emulsifier in the aqueous fluoropolymer dispersion; (c) separating the anion exchange resin from the aqueous fluoropolymer dispersion.