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    METHOD OF MAKING FLUOROPOLYMER DISPERSION
    6.
    发明申请
    METHOD OF MAKING FLUOROPOLYMER DISPERSION 审中-公开

    公开(公告)号：US20180230245A1

    公开(公告)日：2018-08-16

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

    CPC classification number: C08F2/26 ,  C08F14/26 ,  C08K5/095 ,  C08L27/18 ,  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.

    MELT-PROCESSABLE PERFLUOROPOLYMERS HAVING IMPROVED THERMAL AND MECHANICAL PROPERTIES AFTER HEATING TREATMENT
    8.
    发明申请
    MELT-PROCESSABLE PERFLUOROPOLYMERS HAVING IMPROVED THERMAL AND MECHANICAL PROPERTIES AFTER HEATING TREATMENT 有权
    加热处理后的具有改进的热和机械性能的熔融加工的全氟聚合物

    公开(公告)号：US20150315317A1

    公开(公告)日：2015-11-05

    申请号：US14649140

    申请日：2013-12-02

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

    Inventor： Pasqua COLAIANNA ,  Valeriy KAPELYUSHKO ,  Marco MIRENDA

    IPC: C08F214/26 ,  B29C71/02

    CPC classification number: C08F214/265 ,  B29C71/02 ,  B29K2027/12 ,  B29K2105/0085 ,  C08F214/262

    Abstract: The invention mainly pertains to a process for heat treating a composition [composition (C)] which contains at least one melt-processible perfluoropolynner [polymer (F)] formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomers [comonomer (F)] containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight, preferably from 0.6% to 11% by weight, and more preferably from 0.8% to 9% by weight; the process comprising at least the step of heat-treating the composition (C) at a temperature of at least 260° C. and in the absence of a melt flowable polytetrafluoroethylene. The invention is also related to a melt-processible perfluoropolynner [polymer (F1)] formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomers [comonomer (F)] containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight, preferably from 0.6% to 11% by weight, and more preferably from 0.8% to 9% by weight, wherein a particular relation between comonomer (F) content and first melting temperature of polymer (F1) is satisfied.

    Abstract translation: 本发明主要涉及一种组合物[组合物（C）]的热处理方法，该组合物含有至少一种由四氟乙烯（TFE）共聚物形成的可熔融加工的全氟聚合物[聚合物（F）]与一种或多种全氟化共聚单体[共聚单体（F ）]，其含有至少一种乙烯类型的不饱和度为0.5重量％至13重量％，优选0.6重量％至11重量％，更优选0.8重量％至9重量％ 该方法至少包括在至少260℃的温度和不存在可熔融流动的聚四氟乙烯的情况下热处理组合物（C）的步骤。 本发明还涉及由四氟乙烯（TFE）共聚物与一种或多种全氟化共聚单体[共聚单体（F）]形成的可熔融加工的全氟聚合物[聚合物（F1）]，其含有至少一种乙烯类型的不饱和度为0.5％至 13重量％，优选0.6重量％至11重量％，更优选0.8重量％至9重量％，其中，满足聚合物（F1）的共聚单体（F）含量与第一熔融温度之间的特定关系。

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