Removing fluorosurfactant from aqueous fluoropolymer...

Details Removing fluorosurfactant from aqueous fluoropolymer... Removing fluorosurfactant from aqueous fluoropolymer...

2005-12-02

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...

C523S332000, C524S458000, C524S482000, C524S544000, C524S545000

Reexamination Certificate

active

07666927

ABSTRACT:
A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.

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