Aqueous fluoropolymer dipersion comprising a melt processible fluoropolymer and having a reduced amount of fluorinated surfactant

摘要

The present invention provides an aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer in an amount of at least 25% by weight based on the weight of the aqueous fluoropolymer dispersion and a fluorinated surfactant having a molecular weight of not more than 1000g/mol in an amount of not more than 100 ppm, preferably less than 50 ppm, more preferably less than 25 ppm and most preferably less than 10 ppm based on the weight of fluoropolymer solids or being free of said fluorinated surfactant. The aqueous fluoropolymer dispersion has a conductivity of at least 200 mu S/cm, preferably at least 500 mu S/cm and more preferably at least 1000 mu S/cm.