A method for purifying a fluorinated polymer, a method for producing a fluorinated polymer, and a method for producing a molded product of a fluorinated polymer.

摘要

PROBLEM TO BE SOLVED: To provide a method for purifying a fluorine-containing polymer capable of efficiently reducing or removing unnecessary metal ions. The method for purifying a fluorinated polymer of the present invention comprises (i) a step of adding a chelating agent to the fluorinated polymer and (ii) heating the fluorinated polymer to which the chelating agent has been added. Including the process. The heating temperature in the step (ii) is equal to or higher than the volatilization start temperature of the chelate compound which is a reaction product of the metal ion remaining as an impurity in the fluorine-containing polymer and the chelating agent, and the fluorine-containing weight. It is within the range below the decomposition start temperature of the coalescence. [Selection diagram] None