Process for producing aqueous fluoropolymer dispersion
AssigneeDaikin Industries, Ltd.
InventorsSatoru Yoneda, Masahiro Higashi, Sumi Ishihara, Hirotoshi Yoshida, Yohei Fujimoto, Yosuke Kishikawa
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Abstract
A method for producing a fluoropolymer aqueous dispersion, including a step A of subjecting a pre-treatment aqueous dispersion containing a fluoropolymer obtained by polymerization in the presence of a hydrocarbon surfactant to ultrafiltration, microfiltration, or dialysis membrane treatment, or a combination thereof. The ultrafiltration is performed using an ultrafiltration membrane having a molecular weight cutoff of 0.3×104 Da or more.
Claims10
A method for producing a fluoropolymer aqueous dispersion, comprising a step A of subjecting a pre-treatment aqueous dispersion containing a fluoropolymer obtained by polymerization in the presence of a hydrocarbon surfactant to ultrafiltration, microfiltration, or dialysis membrane treatment, or a combination thereof,
- wherein water is added to the pre-treatment aqueous dispersion while performing ultrafiltration, microfiltration, or dialysis membrane treatment, and
- the ultrafiltration is performed using an ultrafiltration membrane having a molecular weight cutoff of 0.3×104 Da or more.
Dependencies are inferred from the claim text.