METHOD FOR PRODUCING AQUEOUS FLUORINE-CONTAINING POLYMER DISPERSION WITH REDUCED FLUORINE-CONTAINING EMULSIFIER CONTENT

摘要

Disclosed is a method for producing an aqueous fluorine-containing polymer dispersion having a reduced fluorine-containing emulsifier content, wherein a fluorine-containing emulsifier is effectively adsorbed and removed from the aqueous fluorine-containing polymer dispersion by using a weak basic anion exchange resin. Specifically disclosed is a method for producing an aqueous fluorine-containing polymer dispersion having a reduced fluorine-containing emulsifier content, wherein an organic carboxylic acid represented by the general formula (1) below is added into an aqueous fluorine-containing polymer dispersion containing a fluorine-containing emulsifier and then the dispersion is brought into contact with a weak basic anion exchange resin, thereby adsorbing and removing the fluorine-containing emulsifier from the dispersion. Q(CH<SUB>2</SUB>)<SUB>m</SUB>(CH(OH))<SUB>n</SUB>COOH (1) (In the formula, Q represents H, CH<SUB>3</SUB> or COOH; and m and n independently represent 0 or an integer of 1-4, while satisfying 4 = n + m = 1.)