| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a fluorine-containing copolymer, by which an unreacted monomer recovered from a mixture containing the fluorine-containing copolymer and the unreacted monomer can be efficiently reused in polymerization.SOLUTION: The method for producing a fluorine-containing copolymer includes: (I) a step of obtaining a mixture containing the fluorine-containing copolymer, an unreacted monomer and a polymerization medium by polymerizing a fluorine-containing monomer having a carboxylic acid type functional group or a sulfonic acid type functional group and a fluorine-containing olefin in the presence of a polymerization initiator in the polymerization medium; (II) a step of heating the obtained mixture while agitating it in an evaporation vessel with an agitator, while continuously or intermittently transferring the mixture to the evaporation vessel, to evaporate and recover the unreacted monomer and the polymerization medium; and in addition, (III) a step of decomposing the polymerization initiator by heating the recovered mixed liquid. |
