Process for producing aqueous fluoropolymer dispersion
US12187859B2 · kind B2 · utility
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Key dates
| Filing date | Apr 27, 2020 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Sep 28, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.