AQUEOUS DISPERSIONS OF FLUOROPOLYMERS

FIELD: organic chemistry, polymers. ^ SUBSTANCE: invention relates to a method for separation of fluoro-containing emulsifier from an aqueous fluoropolymer dispersion prepared by an aqueous emulsion polymerization of fluorinated monomer and, if necessary, co-monomer or co-monomers in the presence of...

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Bibliographische Detailangaben
Hauptverfasser:	BLEDEL' KHERMANN, SHVERTFEGER VERNER, KHINTTSER KLAUS, LER GERNOT, ZUL'TSBAKH RAJNKHARD AL'BERT
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING INKS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	FIELD: organic chemistry, polymers. ^ SUBSTANCE: invention relates to a method for separation of fluoro-containing emulsifier from an aqueous fluoropolymer dispersion prepared by an aqueous emulsion polymerization of fluorinated monomer and, if necessary, co-monomer or co-monomers in the presence of fluoro-containing emulsifier. Method involves addition of effective amount of non-ionic emulsifier to dispersion with the content of solid substance at least 10 wt.-% for its stabilization and for separation of fluoro-containing emulsifier the stabilized dispersion is stirred with anion-exchange resin, dispersion is separated from anion-exchange resin and, if necessary, the prepared by such way dispersion is concentrated, Also, invention relates to an aqueous fluoropolymer dispersion. Invention provides preparing an aqueous fluoropolymer dispersion that is essentially free of fluoro-containing emulsifier. ^ EFFECT: improved separating method, valuable properties of dispersions. ^ 16 cl, 1 tbl, 11 ex