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    FLUOROPOLYMER AND METHOD FOR PRODUCING SAME
    6.
    发明公开
    FLUOROPOLYMER AND METHOD FOR PRODUCING SAME 审中-公开

    公开(公告)号：US20230287154A1

    公开(公告)日：2023-09-14

    申请号：US18319564

    申请日：2023-05-18

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Masahiro HIGASHI ,  Kensuke Yamato ,  Satoru Yoneda ,  Sumi Ishihara ,  Kanako Nakanishi ,  Yosuke Kishikawa

    IPC分类号： C08F14/26 ,  C08F2/16 ,  C09D127/18

    CPC分类号： C08F14/26 ,  C08F2/16 ,  C09D127/18

    摘要： A method for producing a fluoropolymer, which includes polymerizing a monomer (I) represented by the general formula (I) in an aqueous medium to produce the fluoropolymer of the monomer (I), wherein an oxygen concentration in a reaction system of the polymerization is maintained at 500 ppm by volume or less:


    CX2═CY—CF2—O—Rf-A   General formula (I):

    wherein X and Y are independently H, F, CH3, or CF3, and at least one of X and Y is F; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms, or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO3M, —OSO3M, or —C(CF3)2OM, wherein M is H, a metal atom, NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, and R7 is H or an organic group.

    METHOD FOR PRODUCING FLUORINE-CONTAINING POLYMER, AQUEOUS DISPERSION LIQUID OF FLUORINE-CONTAINING POLYMER, AND POLYMER COMPOSITION
    8.
    发明公开
    METHOD FOR PRODUCING FLUORINE-CONTAINING POLYMER, AQUEOUS DISPERSION LIQUID OF FLUORINE-CONTAINING POLYMER, AND POLYMER COMPOSITION 审中-公开

    公开(公告)号：US20230212331A1

    公开(公告)日：2023-07-06

    申请号：US18181687

    申请日：2023-03-10

    申请人： AGC Inc.

    发明人： Kosuke SHIBASAKI ,  Shintaro FUKUNAGA ,  Daisuke TAGUCHI

    IPC分类号： C08F14/26 ,  C08F14/24 ,  C08F14/22

    CPC分类号： C08F14/26 ,  C08F14/24 ,  C08F14/22

    摘要： To provide a method for producing a fluorinated polymer which does not require an emulsifier as an essential component while an aqueous medium with little environmental burden is used. A method for producing a fluorinated polymer, which comprises polymerizing at least one fluorinated polymer selected from tetrafluoroethylene, chlorotrifluoroethylene and vinylidene fluoride, in an aqueous medium in the presence of a specific polymer having at least one type of units selected from units based on a compound represented by the formula (1) and units based on a compound represented by the formula (2) to produce a fluorinated polymer (provided that when tetrafluoroethylene is polymerized, tetrafluoroethylene is polymerized so that the content of units based on tetrafluoroethylene in the fluorinated polymer becomes less than 99 mass % to all units in the fluorinated polymer):


    CXY═CR1—COO-(L-O)n—R2  formula (1):



    CXY═CR3—(O)m—CH2—Z—R4  formula (2):

    FLUORINE-CONTAINING POLYMER AND METHOD OF PRODUCING SAME
    9.
    发明申请
    FLUORINE-CONTAINING POLYMER AND METHOD OF PRODUCING SAME 有权

    公开(公告)号：US20220389132A1

    公开(公告)日：2022-12-08

    申请号：US17880011

    申请日：2022-08-03

    申请人： AGC INC.

    发明人： Shun WATANUKI

    IPC分类号： C08F36/20 ,  C08F14/26

    摘要： A fluorine-containing polymer has a fluorine content of 50% by mass or more, a degree of unsaturation of 0.1 mEq/g or more, and a glass transition temperature of −20° C. or higher, and the relationship between the maximum value E*1 of the complex elastic modulus in the range of from −50° C. to (glass transition temperature−10° C.) and the minimum value E*2 of the complex elastic modulus in the range of from (glass transition temperature+10° C.) to 250° C. satisfies the following inequality: E*2/E*1≤0.01.