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AssigneeDaikin Industries, Ltd.
InventorsYoshinori NANBA, Kenji ICHIKAWA, Taketo KATO, Taku YAMANAKA
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Provided is a method for producing a fluoropolymer composition, comprising bringing a fluoropolymer raw material into contact with an oxidizing agent, wherein the fluoropolymer raw material is obtained by polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) derived from a monomer (I) represented by the general formula (I). CX1X3═CX2R(—CZ1Z2-A0)m (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.
A method for producing a fluoropolymer composition, comprising bringing a fluoropolymer raw material into contact with an oxidizing agent, wherein the fluoropolymer raw material is obtained by polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) derived from a monomer (I) represented by the general formula (I):
A fluoropolymer composition containing at least a fluoropolymer, wherein when forming to obtain a bead having a length of 5 m by subjecting the fluoropolymer composition to paste extrusion forming using an extrusion forming machine equipped with a thoroughly washed extrusion forming die is repeated multiple times, a rate of increase in paste extrusion pressure in the fourth forming based on the paste extrusion pressure in the first forming is 3.0% or less.
Dependencies are inferred from the claim text.