CROSSLINKABLE FLUOROPOLYMER AND COATING FORMED THEREFROM

    公开(公告)号:WO2022011203A1

    公开(公告)日:2022-01-13

    申请号:PCT/US2021/040985

    申请日:2021-07-09

    发明人: CHEN, Xudong

    摘要: Provided is a high oil contact angle coating comprising fluoropolymer, compositions and processes for forming the coating, and articles comprising the coating. The fluoropolymer is a crosslinkable tetrapolymer fluoropolymer produced from the copolymerization of monomers tetrafluoroethylene, fluoro(alkyl vinyl ether) or fluoro(alkyl ethylene), alkyl vinyl ether and alkenyl silane. The fluoropolymer coating has high oil contact angle and utility as coating when the fluoropolymer is in the uncrosslinked or crosslinked state.

    STRETCHED, HIGHLY-UNIFORM CATION EXCHANGE MEMBRANES AND PROCESSES OF FORMING SAME

    公开(公告)号:WO2021263065A1

    公开(公告)日:2021-12-30

    申请号:PCT/US2021/039015

    申请日:2021-06-25

    摘要: A cation exchange membrane includes a film of fluorinated ionomer containing sulfonate groups. The film has a machine direction and a transverse direction perpendicular to the machine direction. The membrane has a water swell in both the machine direction and the transverse direction of less than about 5%. The membrane has a ratio of in-plane conductivity in the machine direction to in-plane conductivity in the transverse direction of about 0.9 to about 1.1. A process makes a cation exchange membrane including a film of fluorinated ionomer containing sulfonate groups. The process includes forming a film of the ionomer. The process also includes biaxially stretching the film in both a machine direction and a transverse direction perpendicular to the machine direction. An electrochemical cell has anode and cathode compartments and includes a cation exchange membrane as a separator between the anode and cathode compartments.