Fluoropolymer aqueous dispersions
AssigneeSolvay Solexis S.p.A.
InventorsMario Visca, Alba Chittofrati, Valeri Kapeliouchko, Marco Malvasi
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Abstract
Fluoropolymer aqueous dispersions having particles with average diameters from 150 to 400 nm, comprising bifunctional fluorinated surfactants having formula: A-Rf—B (I) wherein: A and B, equal to or different from each other, are: —(O)pCFX—COOM; M=NH4, alkaline metal, H; X=F, CF3; p is an integer equal to 0 or 1; Rf is a linear or branched perfluoroalkyl chain, or a (per)fluoropolyether chain such that the number average molecular weight of (I) is in the range 300-1,800.
Claims17
Aqueous dispersions of fluoropolymers having particles with average diameters in the range 150-400 nm, preferably 170-280 nm, comprising bifunctional fluorinated surfactants having formula:
- A-Rf—B (I)
- wherein:
- A and B, equal to or different from each other, are:
- —(O)pCFX—COOM
- wherein:
- M=NH4, alkaline metal, H;
- X=F, CF3;
- p is an integer equal to 0 or 1;
- Rf is a linear or branched perfluoroalkyl chain, or a (per)fluoropolyether chain such that the number average molecular weight of (I) is in the range 300-1,800, preferably 500-1,600, more preferably 600-1,200.
Dependencies are inferred from the claim text.