Process for reducing fluorosurfactant content of...

Details Process for reducing fluorosurfactant content of... Process for reducing fluorosurfactant content of...

2007-05-22

2010-02-23

Mulcahy, Peter D. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C210S662000, C524S544000, C524S700000, C524S800000, C524S805000, C554S191000

Reexamination Certificate

active

07666929

ABSTRACT:
A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion. The process includes providing a fixed bed of anion exchange resin having anion exchange groups with counter ions. The anion exchange resin is treated to replace at least some the counter ions with counter ions of non-fluorinated anionic surfactant. The stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion is passed through the treated fixed bed of anion exchange resin.

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