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    Method of making fluoropolymer dispersion
    3.
    发明授权
    Method of making fluoropolymer dispersion 有权

    公开(公告)号：US10982018B2

    公开(公告)日：2021-04-20

    申请号：US15515483

    申请日：2015-09-29

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Stefana Musio ,  Marco Malvasi ,  Valeriy Kapelyushko

    IPC: C08L27/18 ,  C08F2/26 ,  C08F14/26 ,  C08K5/095 ,  C08L71/02 ,  C09D127/18

    Abstract: The invention pertains to a method for making a fluoropolymer dispersion, said method comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in an aqueous medium comprising a surfactant mixture [mixture (S)] comprising: at least one perfluorohexanoic acid or salt thereof [surfactant (C6)], in an amount of 1 to 5 g/I, with respect to said aqueous medium; and at least one linear bifunctional perfluoropolyether surfactant [surfactant (PFPE)] complying with formula (I) here below: XpOOC—CF2-0-(CF20) n(CF2CF20)m-CF2—COOXp (I) wherein: Xp, equal to or different from each other, is a hydrogen atom, a monovalent metal, preferably an alkaline metal, or an ammonium group of formula —N(R′n)4, wherein R′n, equal or different at each occurrence, is a hydrogen atom or a C1-C6hydrocarbon group, preferably an alkyl group; n′ and m′ are independently integers >0 such that the number average molecular weight of the surfactant (PFPE) is of 500 to 2500, said surfactant (PFPE) being used in an amount of 0.005 to 0.5 g/I, with respect to said aqueous medium.

    TETRAFLUOROETHYLENE COPOLYMERS
    4.
    发明申请
    TETRAFLUOROETHYLENE COPOLYMERS 审中-公开
    四氢氟乙烯共聚物

    公开(公告)号：US20150197620A1

    公开(公告)日：2015-07-16

    申请号：US14409086

    申请日：2013-06-13

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Stefana Musio ,  Valeriy Kapelyushko ,  Marco Malvasi ,  Stefano Vincenzo Radice

    IPC: C08K5/1565

    CPC classification number: C08K5/1565 ,  C08F14/26 ,  C08F214/26 ,  C08F2/24

    Abstract: The invention pertains to a tetrafluoroethylene (TFE) copolymer comprising recurring units derived from at least one per(halo)fluoroolefin different from TFE [monomer (F)] [monomer (F)], in an amount of 0.005 to 0.250% moles, with respect to the total moles of the copolymer, wherein a particular relation between monomer content and amorphous index is satisfied, and to a process for its manufacture by emulsion polymerization in the presence of certain cyclic surfactants.

    Abstract translation: 本发明涉及包含衍生自至少一种不同于TFE [单体（F）] [单体（F）]的（卤代）氟烯烃的重复单元的四氟乙烯（TFE）共聚物，其量为0.005-0.250摩尔％，与 相对于共聚物的总摩尔数，其中满足单体含量和无定形指数之间的特定关系，以及在某些环状表面活性剂存在下通过乳液聚合制造的方法。

    Tetrafluoroethylene copolymers
    8.
    发明授权
    Tetrafluoroethylene copolymers 有权

    公开(公告)号：US10047181B2

    公开(公告)日：2018-08-14

    申请号：US14409082

    申请日：2013-06-13

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Stefana Musio ,  Valeriy Kapelyushko ,  Marco Malvasi ,  Stefano Vincenzo Radice

    IPC: C08F2/10 ,  C08F214/26

    Abstract: The invention pertains to a tetrafluoroethylene (TFE) copolymer comprising recurring units derived from at least one perfluoroalkyl(oxy)vinylether of formula CF2═CF—O—Rf, wherein Rf is a C1-C6 perfluoroalkyl radical possibly comprising one or more ethereal oxygen atoms [monomer (F)], in an amount of 0.005 to 0.025% moles, with respect to the total moles of the copolymer, wherein a particular relation between monomer content and amorphous index is satisfied, and to a process for its manufacture by emulsion polymerization in the presence of certain cyclic surfactants.

    METHOD FOR MANUFACTURING FLUOROPOLYMERS
    10.
    发明申请
    METHOD FOR MANUFACTURING FLUOROPOLYMERS 有权

    公开(公告)号：US20230002518A1

    公开(公告)日：2023-01-05

    申请号：US17784965

    申请日：2020-12-09

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Stefana Musio ,  Fiorenza D'aprile ,  Serena Carella ,  Valeriy Kapelyushko ,  Bradley Lane Kent ,  Alessio Marrani

    IPC: C08F14/24

    Abstract: The present invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, comprising the following steps: provide a reactor containing a liquid reaction medium comprising water introduce in said reactor ethylene monomers and fluorinated monomers, said fluorinated monomers being selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof, pressurize the reactor, initiate polymerization feeding into said reactor a redox initiator comprising an oxidising agent and a reducing agent, wherein said reducing agent in said redox couple initiator is free from sulphur atoms having an oxidation number of 4 or below, wherein the reaction medium is free of fluorinated surfactants.

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