Fluororesin aqueous dispersion, an aqueous fluorine paints and articles that have been painted with paint

摘要

PROBLEM TO BE SOLVED: To provide a fluororesin aqueous dispersion, which can be produced in an easy process, and with which a coating film with high weather resistance can be formed, and which shows excellent long-term storage stability.SOLUTION: A fluororesin aqueous dispersion is obtained, for example, through the following steps: a first step of copolymerizing a monomer mixture (I) essentially comprising a fluoroolefin compound (a1) and a vinyl monomer (a2) having a hydroxyl group; a second step of adding a monomer mixture (II) essentially comprising a fluoroolefin compound (a1), a vinyl monomer (a2) having a hydroxyl group and a vinyl monomer (a3) having a carboxyl group to the reaction product obtained in the first step to further copolymerize it to obtain a fluororesin (A); and a third step of neutralizing the carboxyl group possessed by the fluororesin (A) with a basic compound, and dispersing it in an aqueous medium.