FLUOROPOLYMER DISPERSION CONTAINING NO OR SMALL AMOUNT OF LOW-MOLECULAR WEIGHT FLUORINATED SURFACTANT

FIELD: polymer materials. ^ SUBSTANCE: invention deals with aqueous fluoropolymer dispersions containing no low-molecular weight fluorinated surfactant or containing the same in small amounts. Disclosed is, in particular, a fluoropolymer dispersion containing fluoropolymer particles with average siz...

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Bibliographische Detailangaben
Hauptverfasser: DADALAS MAJKL S, EPSH REBEKKA, KLOOS FRIDRIKH, KHARVEJ LEONARD V
Format: Patent
Sprache:eng ; rus
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Zusammenfassung:FIELD: polymer materials. ^ SUBSTANCE: invention deals with aqueous fluoropolymer dispersions containing no low-molecular weight fluorinated surfactant or containing the same in small amounts. Disclosed is, in particular, a fluoropolymer dispersion containing fluoropolymer particles with average size from 10 to 400 nm while dispersion contains no fluorinated surfactant having molecular mass below 1000 g/mole or contains the same in amount no higher than 0.025% based on the summary mass of dispersion solids. Dispersion further contains nonionic and anionic surfactants selected from those having molecular mass at least 1000 g/mole, non-fluorinated anionic surfactants, and mixtures thereof. Also disclosed are a method for obtaining dispersion of fluoropolymer particles and a method for depositing dispersion onto a substrate. ^ EFFECT: reduced viscosity of fluoropolymer dispersions with high content of solids including surfactants as stabilizers. ^ 14 cl, 5 ex