PREPARATION OF FLUORINE-CONTAINING RESIN AQUEOUS DISPERSION

PURPOSE:To prepare the subject dispersion having good water resistance, good water repellency, etc., and not having foamability substantially without an activating agent by polymerizing a fluorine-containing monomer in the presence of a resin aqueous solution prepared from a monomer not containing a fluorine- containing monomer. CONSTITUTION:A resin emulsion or resin aqueous solution is synthesized from a monomer containing no fluorine atom without an emulsifier. Monomers containing >=75wt.% of a fluorine-containing monomer is polymerized in the presence of the prepared resin emulsion or resin aqueous solution to provide the objective dispersion. The resin emulsion or resin aqueous solution is preferably prepared by solution-polymerizing an ethylenic unsaturated monomer having a salt-forming group or polyalkylene oxide group in the presence of a polymerization initiator such as benzoyl peroxide in an organic solvent and subsequently adding water to the polymerization solution.