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    Method for Producing Fluorine-Containing Polymer and Composition
    4.
    发明公开
    Method for Producing Fluorine-Containing Polymer and Composition 审中-公开

    公开(公告)号：US20240124632A1

    公开(公告)日：2024-04-18

    申请号：US18266329

    申请日：2021-12-02

    申请人： Central Glass Company, Limited

    发明人： Ryo NADANO ,  Satoru MIYAZAWA ,  Yuzuru KANEKO

    IPC分类号： C08F220/24 ,  C07C67/08 ,  C07C67/54 ,  C07C69/653

    CPC分类号： C08F220/24 ,  C07C67/08 ,  C07C67/54 ,  C07C69/653

    摘要： Provided is a method for producing a fluorine-containing polymer with little lot-to-lot variation in weight average molecular weight. The method for producing a fluorine-containing polymer of the present invention relates to a method for producing a fluorine-containing polymer containing a repeating unit of formula (1) and a repeating unit of formula (2), which includes: fluorine-containing monomer synthesis including reacting a diol of formula (3) with at least one selected from the group consisting of unsaturated carboxylic acids, esters of the unsaturated carboxylic acids, acid halides of the unsaturated carboxylic acids, and anhydrides of the unsaturated carboxylic acids, to obtain a composition containing a fluorine-containing monomer of formula (4) as a main reaction product and a fluorine-containing monomer of formula (5) as a minor reaction product; fluorine-containing monomer purification including removing the fluorine-containing monomer of formula (5) from the composition to adjust the amount of the fluorine-containing monomer of formula (5), expressed in parts per million based on the mass of the fluorine-containing monomer of formula (4), to 1500 ppm or less; and polymerization including performing a polymerization reaction of the composition obtained after the fluorine-containing monomer purification to give the fluorine-containing polymer containing the repeating unit of formula (1) and the repeating unit of formula (2),

    Composition, optical film, polarizing plate, display device, and method for producing composition
    8.
    发明授权
    Composition, optical film, polarizing plate, display device, and method for producing composition 有权

    公开(公告)号：US11613596B2

    公开(公告)日：2023-03-28

    申请号：US16712030

    申请日：2019-12-12

    申请人： FUJIFILM Corporation

    发明人： Reiko Fukagawa ,  Akio Tamura ,  Taketo Otani

    IPC分类号： C08F220/22 ,  G02B5/30 ,  C08F220/24 ,  G02F1/1335 ,  G02B1/14

    摘要： A fluorine-containing copolymer composition includes repeating units derived from a fluorine-containing monomer represented by Formula (I) and from a monomer having at least two polymerizable groups, in which the latter is 3% by mass or more with respect to a total mass of the fluorine-containing copolymer, and the former is 15% by mass or more with respect to a total solid content in the composition, in the Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R2 represents a group having at least one fluorine atom; and L1 represents a divalent linking group including at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, —(C═O)NH—, —NH(C═O)—, a divalent aromatic group which may have a substituent, a divalent aliphatic chain group which may have a substituent, and a divalent aliphatic cyclic group which may have a substituent.