3m Innovative Properties Company

Dyneon Gmbh

Hermann Bl&auml;del

Gernot L&ouml;hr

Klaus Hintzer

Werner Schwertfeger

Reinhard Albert Sulzbach

Gerd Grossmann

Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a nonionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.

Aqueous dispersions of fluoropolymers

Aqueous dispersions of fluoropolymers obtained by emulsion polymerization and containing at least one fluoropolymer A) with an average particle size (number-average) of at least 200 nm and at least one fluoropolymer B) with an average particle size (number-average) of not more than 100 nm, one of components A) and B) being a thermoplastic and the other component not being processable from the melt, and the entire dispersion having a non-monomodal number distribution of particle diameter, are suitable for saturating, impregnating surfaces, for example of fibers or sheet-like articles made from fibers or porous materials, in particular for coating glass-fiber fabrics as well as for formulating metal-coating systems.

Aqueous dispersion of fluoropolymers of varying particle size

Growing community of inventors

Emmerting, Germany

Hermann Blädel

Growing community of inventors

Emmerting, Germany

Hermann Bl&auml;del

Hermann Blädel