Patent ID: 7989513
Filing Date: 2011-08-02
Classification: C08J,H01M,Y02E,Y02P

Abstract:
1. A process for producing a dispersion of a highly fluorinated ion exchange polymer, comprising: providing a dispersion of a highly fluorinated ion exchange polymer in a first liquid comprised of from 10 to 60 wt % of one or more organic liquids, of an organic liquid, atomizing said dispersion to produce droplets of the dispersion, releasing the dispersion droplets into a heated gas, drying the dispersion droplets in the heated gas to produce polymer particles wherein the polymer particles agglomerate during drying, and the agglomerated particles have a mean diameter in the range of 1 to 100 microns and which agglomerated particles, upon drying, produce flowable particles of highly fluorinated ion exchange polymer, wherein the flowable polymer particles have dry surfaces and an internal residual moisture content in the range of from 4 to 10 wt %, and dispersing said polymer particles in a second liquid selected from the group consisting of water, organic liquid, and mixtures thereof to produce a second dispersion of highly fluorinated ion exchange polymer.