Method of coating a substrate with a fluoropolymer dispersion

The present invention provides a method of coating a substrate having a surface defined by a layer of fluoropolymer, the method comprising (i) providing an aqueous dispersion comprising: (a) particles of melt-processible fluoropolymer in an amount of 30 to 70% by weight; (b) fluorinated surfactant i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DADALAS, MICHAEL, LOEHR, GERNOT, HINTZER, KLAUS, ZIPPLIES, TILMAN
Format:	Patent
Sprache:	eng ; pol
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention provides a method of coating a substrate having a surface defined by a layer of fluoropolymer, the method comprising (i) providing an aqueous dispersion comprising: (a) particles of melt-processible fluoropolymer in an amount of 30 to 70% by weight; (b) fluorinated surfactant in an amount of not more than 250ppm based on fluoropolymer solids of the aqueous dispersion; (c) a non-ionic surfactant comprising an ethoxylated aliphatic alcohol in an amount of 2 to 15% by weight based on total solids of the aqueous dispersion; and wherein the aqueous dispersion is free or substantially free of aromatic group containing non-ionic surfactants; (ii) optionally diluting and/or adding further components to said dispersion so as to obtain a coating composition; (iii) applying said coating composition on at least part of said surface of said substrate defined by said layer of said fluoropolymer.