METHOD FOR PRODUCTION OF FLUORINATED POLYMER AND METHOD FOR PRODUCTION OF FLUORINATED ION-EXCHANGE POLYMER Russian patent published in 2022 - IPC C08F34/02 C08F214/18 C08F2/14 C08F216/38 

FIELD: chemistry.

SUBSTANCE: present invention relates to a group of inventions including a method for the production of fluorinated polymer, a method for the production of fluorinated ion-exchange polymer, fluorinated polymer, electrolyte material, a liquid composition, a membrane electrode block for a fuel cell with a polymer electrolyte, and a fuel cell with a polymer electrolyte. The method for the production of fluorinated polymer includes polymerization of a mixture of initial materials. The mixture of initial materials contains monomer composition M11 and fluorinated monomer m11H. Monomer composition M11 contains perfluoromonomer of the formula In fluorinated monomer m11H, at least some of fluorine atoms in the specified perfluoromonomer are substituted with hydrogen atoms. The total amount of fluorinated monomer m11H is from 10 to 1100 ppm of the total amount of monomer composition M11. The method for the production of fluorinated ion-exchange polymer includes polymerization of a mixture of initial materials, containing monomer having precursor groups for an ion-exchange group to obtain fluorinated polymer containing a precursor group. Then, fluorinated polymer containing the precursor group contacts a base to convert the precursor group into an ion-exchange group. Fluorinated polymer is obtained by polymerization of the mixture of initial materials, containing monomer composition M11, which includes perfluoromonomer and fluorinated monomer m11H, in which at least some of fluorine atoms in the specified perfluoromonomer are substituted with hydrogen atoms. This fluorinated polymer is used in electrolyte material. The liquid composition contains a suspension and electrolyte material dispersed in the suspension. The suspension contains one or both components of water and an organic solvent containing a hydroxy group. The membrane electrode block for a fuel cell with a polymer electrolyte contains an anode with a catalyst layer containing proton-conducting polymer, a cathode having a catalyst layer containing proton-conducting polymer, and membrane made of a solid polymer electrolyte. Membrane is located between the anode and the cathode. The fuel cell with a polymer electrolyte contains this block of a membrane electrode.

EFFECT: development of a method for the production of fluorinated polymer having dioxolane ring structures, and development of a method for the production of fluorinated ion-exchange polymer, including a polymerization process using perfluoromonomer, obtaining fluorinated polymer with a lower probability of reduction in the molecular weight, even when in contact with a base.

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