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    METHOD FOR PRODUCING FLUOROPOLYMER
    34.
    发明申请
    METHOD FOR PRODUCING FLUOROPOLYMER 有权

    公开(公告)号：US20220153889A1

    公开(公告)日：2022-05-19

    申请号：US17592754

    申请日：2022-02-04

    Applicant: Daikin Industries, Ltd.

    Inventor： Yukari YAMAMOTO ,  Tadaharu ISAKA ,  Yumi ZENKE ,  Ryouichi FUKAGAWA

    IPC: C08F214/18 ,  C08F214/28 ,  C08F214/26 ,  C08F2/18 ,  C08K5/095

    Abstract: A method for producing a fluoropolymer which includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorine-containing diacyl peroxide represented by the formula (1): XRfaC(═O)OOC(═O)RfbY (wherein X and Y are each independently H or F; and Rfa and Rfb are each independently a C1-C6 linear or branched perfluoroalkylene group optionally containing an ether bond) and a fluorine-containing carboxylic acid represented by the following formula (2): Z2RfcCOOH (wherein Z2 is H or F; and Rfc is a C1-C3 linear or branched perfluoroalkylene group optionally containing an ether bond when Z2 is H, and Rfc is a C1 or C2 linear or branched perfluoroalkylene group optionally containing an ether bond when Z2 is F) to provide a fluoropolymer.

    METHOD FOR RECOVERING FLUORINE-CONTAINING ETHER
    36.
    发明申请
    METHOD FOR RECOVERING FLUORINE-CONTAINING ETHER 有权
    回收含氟元素的方法

    公开(公告)号：US20150376100A1

    公开(公告)日：2015-12-31

    申请号：US14654238

    申请日：2014-01-20

    Applicant: DAIKIN INDUSTRIES, LTD.

    Inventor： Yumi ZENKE ,  Tadaharu ISAKA ,  Ryouichi FUKAGAWA ,  Takeshi SHIMONO

    IPC: C07C41/40 ,  C08F14/20 ,  C08F14/22 ,  C08F14/18 ,  C08F14/26 ,  C08F14/28

    CPC classification number: C07C41/40 ,  C07C41/34 ,  C08F6/008 ,  C08F6/16 ,  C08F6/24 ,  C08F6/28 ,  C08F14/18 ,  C08F14/185 ,  C08F14/20 ,  C08F14/22 ,  C08F14/26 ,  C08F14/28 ,  C08F214/262 ,  C08F214/282 ,  C08L27/12 ,  C07C43/12

    Abstract: An object of the present invention is to provide a method for recovering a fluorine-containing ether capable of recovering a fluorine-containing ether used for producing a fluoropolymer, in higher recovery yield and in a shorter time. The present invention relates to a method for recovering a fluorine-containing ether, including the steps of: producing a wet fluoropolymer by suspension polymerization, solution polymerization, or bulk polymerization in the presence of at least a specific fluorine-containing ether; vaporizing and discharging vaporizable substances including the fluorine-containing ether by heating the wet fluoropolymer in a container; and transferring the vaporizable substances in the vaporized state to a cooling means to cool the vaporizable substances.

    Abstract translation: 本发明的目的是提供一种能够回收用于制备含氟聚合物的含氟醚的含氟醚的回收率高的方法。 本发明涉及一种回收含氟醚的方法，包括以下步骤：在至少一种特定含氟醚存在下，通过悬浮聚合，溶液聚合或本体聚合制备湿氟聚合物; 通过加热容器中的含氟聚合物来蒸发和排出包括含氟醚的可蒸发物质; 并将蒸发状态的可蒸发物质转移到冷却装置以冷却可蒸发物质。

    FLUORINE-CONTAINING COPOLYMER
    37.
    发明申请
    FLUORINE-CONTAINING COPOLYMER 有权

    公开(公告)号：US20250011501A1

    公开(公告)日：2025-01-09

    申请号：US18888421

    申请日：2024-09-18

    Applicant: DAIKIN INDUSTRIES, LTD.

    Inventor： Tadaharu ISAKA ,  Yumi Zenke ,  Yukari Yamamoto

    IPC: C08F214/28 ,  H01B3/44

    Abstract: There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 10.4 to 11.4% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 0.8 to 1.28 by mass with respect to the whole of the monomer units, a melt flow rate at 372° C. of 7.1 to 9.4 g/10 min, and a total number of a carbonyl group-containing terminal group, —CF═CF2 and —CH2OH per 106 main-chain carbon atoms of 90 or less.

    FLUORINE-CONTAINING COPOLYMER
    39.
    发明申请
    FLUORINE-CONTAINING COPOLYMER 有权

    公开(公告)号：US20250011486A1

    公开(公告)日：2025-01-09

    申请号：US18887392

    申请日：2024-09-17

    Applicant: DAIKIN INDUSTRIES, LTD.

    Inventor： Tadaharu ISAKA ,  Yumi ZENKE ,  Yukari YAMAMOTO

    IPC: C08F214/26 ,  C09D127/18 ,  H01B3/44

    Abstract: There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro (propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 9.4 to 10.3% by mass with respect to the whole of the monomer units, a content of perfluoro (propyl vinyl ether) unit of 1.4 to 2.4% by mass with respect to the whole of the monomer units, a melt flow rate at 372° C. of 24.1 to 39.9 g/10 min, and a total number of a carbonyl group-containing terminal group, —CF═CF2 and —CH2OH per 106 main-chain carbon atoms of 120 or less.

    FLUORINE-CONTAINING COPOLYMER
    40.
    发明公开
    FLUORINE-CONTAINING COPOLYMER 审中-公开

    公开(公告)号：US20230416431A1

    公开(公告)日：2023-12-28

    申请号：US18451213

    申请日：2023-08-17

    Applicant: DAIKIN INDUSTRIES, LTD.

    Inventor： Tadaharu ISAKA ,  Yukari Yamamoto ,  Yumi Zenke

    IPC: C08F214/26 ,  C08F214/28 ,  H01B3/44

    CPC classification number: C08F214/262 ,  H01B3/445 ,  C08F214/282

    Abstract: There is provided a fluorine-containing copolymer containing tetrafluoroethylene unit, hexafluoropropylene unit and a fluoro(alkyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 5.0 to 7.5% by mass with respect to the whole of the monomer units, a content of the fluoro(alkyl vinyl ether) unit of 0.8 to 2.9% by mass with respect to the whole of the monomer units, a melt flow rate at 372° C. of 0.7 to 9.5 g/10 min, and the number of functional groups of 90 or less per 106 main-chain carbon atoms.

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