Process for preparing fluoropolymer dispersions

Details Process for preparing fluoropolymer dispersions Process for preparing fluoropolymer dispersions

2007-11-13

2007-11-13

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S915000, C210S743000, C524S544000

Reexamination Certificate

active

11319802

ABSTRACT:
A process to substantially remove the fluorinated anionic surfactants from fluoropolymer dispersions comprising the following steps:a) addition to the fluoropolymer dispersion of an anionic polyelectrolyte;b) contact of the dispersion with an anionic exchanger;c) separation of the dispersion from the anionic exchanger and recovery of the dispersion substantially fluorinated anionic surfactant free.

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