FLUORINE-CONTAINING COPOLYMER COMPOSITION
    1.
    发明申请

    公开(公告)号:US20200157288A1

    公开(公告)日:2020-05-21

    申请号:US16750115

    申请日:2020-01-23

    Applicant: AGC Inc.

    Abstract: Provided is a fluorine-containing copolymer composition capable of forming a uniform coating.The composition comprises a fluorine-containing copolymer having units derived from tetrafluoroethylene, units derived from ethylene, and 0.4 to 1.0 mol % of at least one functional group selected from the group consisting of a carbonyl group-containing group, an acid anhydride group, a carboxy group, a hydroxy group, an epoxy group, an amide group, an amino group, and an isocyanate group, and an aliphatic compound having 6 to 10 carbon atoms having one carbonyl group.

    METHOD FOR PRODUCING AQUEOUS POLYTETRAFLUOROETHYLENE DISPERSION

    公开(公告)号:US20230357515A1

    公开(公告)日:2023-11-09

    申请号:US18352379

    申请日:2023-07-14

    Applicant: AGC Inc.

    CPC classification number: C08J3/05 C08F114/26 C08J2327/18

    Abstract: To provide a method for producing an aqueous polytetrafluoroethylene dispersion, whereby the formation of fluorinated oligomers as byproducts is minimized, CFT of the formed coating film is large, and a highly concentrated aqueous polytetrafluoroethylene dispersion is easily obtainable. The method for producing an aqueous polytetrafluoroethylene dispersion, which comprises step A1 of polymerizing a non-fluorinated monomer in an aqueous medium to obtain a solution 1 containing a polymer containing units based on the non-fluorinated monomer, step A2 of conducting polymerization of tetrafluoroethylene in the solution 1 without substantially adding a surfactant to the solution 1, to obtain an aqueous emulsion containing polytetrafluoroethylene particles, and step A3 of adding a nonionic surfactant to the aqueous emulsion at a rate of from 10 to 150 mass % to the mass of PTFE contained in the aqueous emulsion, and subsequently concentrating the aqueous emulsion to obtain an aqueous polytetrafluoroethylene dispersion, wherein the amount of the non-fluorinated monomer used, to the amount of the tetrafluoroethylene supplied to the polymerization system, is at most 200 mass ppm.

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