A process for reducing fluorosurfactant content of a fluorosurfactant-containing aqueous fluoropolymer dispersion stabilized with nonionic surfactant. The process includes reducing the fluorosurfactant content of the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion to a predetermined level to provide a reduced surfactant dispersion, adding non-fluorinated anionic surfactant to the reduced fluorosurfactant dispersion, and concentrating the reduced fluorosurfactant dispersion. The non-fluorinated anionic surfactant is added in stages wherein a first portion is added to the dispersion prior to concentrating and a second portion of the non-fluorinated anionic surfactant is added to the dispersion after concentrating.

 
Web www.patentalert.com

< Process for reducing fluorosurfactant content of fluropolymer dispersions using anionic surfactant-treated anion exchange resin

> Centrifugal separator of heavier particulate materials from light particulate materials in a slurry using a stepped lead-in surface

> Apparatus for the continuous separation of biological fluids into components and method of using same

~ 00584