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    Recovery of fluorinated emulsifying acids from basic anion exchangers
    4.
    发明授权
    Recovery of fluorinated emulsifying acids from basic anion exchangers 失效
    从碱性阴离子交换剂回收氟化乳化酸

    公开(公告)号：US4282162A

    公开(公告)日：1981-08-04

    申请号：US115803

    申请日：1980-01-28

    申请人： Jurgen Kuhls

    发明人： Jurgen Kuhls

    IPC分类号： B01D15/00 ,  B01D15/04 ,  B01J20/34 ,  B01J47/00 ,  B01J47/014 ,  B01J49/00 ,  B01J49/07 ,  C07C51/47 ,  C07C51/42 ,  C08F1/88

    CPC分类号： B01J49/0013 ,  B01J47/003 ,  C07C51/47 ,  C08F6/16

    摘要： To elute fluorinated emulsifying acids, especially perfluoro-carboxylic acids, from basic anion exchangers a mixture of dilute mineral acid and polar organic solvents is used. The solvent should be miscible with water preferably to an extent of at least 40%. By this process the required amount of eluent and the time of elution can be reduced while simultaneously the amount of recovered emulsifying acid can be improved. The process is especially suitable for the recovery of fluorinated emulsifiers in the coagulation or concentration of fluoropolymer latices.

    摘要翻译： 为了从碱性阴离子交换剂中洗脱含氟乳化酸，特别是全氟羧酸，使用稀无机酸和极性有机溶剂的混合物。 溶剂应与水混溶，优选至少为40％。 通过该方法，可以减少所需量的洗脱液和洗脱时间，同时可以提高回收的乳化酸的量。 该方法特别适用于在含氟聚合物胶乳的凝结或浓缩中回收氟化乳化剂。

    Free-flowing sintering powders which have improved properties and are based on tetrafluoroethylene polymers, and a process for their manufacture
    5.
    发明授权
    Free-flowing sintering powders which have improved properties and are based on tetrafluoroethylene polymers, and a process for their manufacture 失效
    具有改进性能并基于四氟乙烯聚合物的自由流动的烧结粉末及其制造方法

    公开(公告)号：US4368296A

    公开(公告)日：1983-01-11

    申请号：US214465

    申请日：1980-12-08

    申请人： Jurgen Kuhls ,  Robert Hartwimmer

    发明人： Jurgen Kuhls ,  Robert Hartwimmer

    IPC分类号： C08J3/12 ,  C08F14/00 ,  C08F14/26 ,  C08F214/26 ,  C08F259/08 ,  C08J3/16 ,  C08L1/00 ,  C08L27/00 ,  C08L27/12 ,  C08L27/18 ,  C08F114/26

    CPC分类号： C08J3/16 ,  C08F14/26 ,  C08F259/08 ,  C08J2327/18

    摘要： Free-flowing sintering powders based on polymers containing at least 98.5% by weight of tetrafluoroethylene units can be prepared from colloidal polymer dispersions obtained in a customary manner by emulsion polymerization, stirring being carried out initially, optionally with the addition of an inorganic salt, until thickening, indicated by optical inhomogeneities, is achieved, an organic liquid which wets the polymer particles and is soluble in water to the extent of not more than 15% by weight then being added and stirring then being continued until granules are produced. The polymers preferably contain up to 1.5% by weight of polymerized units of at least one modifying, perfluorinated monomer. The free-flowing sintering powders have a high bulk density, an excellent flow time and further advantageous properties. They can be provided with customary fillers and are suitable for ram extrusion and for press-sintering processing to give sintered blocks and subsequently veneer-cut films.

    摘要翻译： 基于含有至少98.5重量％的四氟乙烯单元的聚合物的自由流动的烧结粉末可以由通过乳液聚合以常规方式获得的胶体聚合物分散体制备，首先进行搅拌，任选地加入无机盐，直到 实现了由光学不均匀性指示的增稠，将聚合物颗粒润湿并且可溶于水的程度不大于15重量％的有机液体，然后加入并搅拌，然后继续直到制备颗粒。 聚合物优选含有至多1.5重量％的至少一种改性全氟化单体的聚合单元。 自由流动的烧结粉末具有高的堆积密度，优异的流动时间和更好的性能。 它们可以提供常规的填料，适用于冲压挤出和压制烧结加工，得到烧结块和随后的单板切割薄膜。

    Fluoropolymers with shell-modified particles, and processes for their preparation
    8.
    发明授权
    Fluoropolymers with shell-modified particles, and processes for their preparation 失效
    具有壳改性颗粒的含氟聚合物及其制备方法

    公开(公告)号：US4391940A

    公开(公告)日：1983-07-05

    申请号：US358828

    申请日：1982-03-16

    申请人： Jurgen Kuhls ,  Franz Mayer ,  Herbert Fitz

    发明人： Jurgen Kuhls ,  Franz Mayer ,  Herbert Fitz

    IPC分类号： C08L27/12 ,  C08F2/22 ,  C08F14/00 ,  C08F14/18 ,  C08F214/18 ,  C08F259/08 ,  C08F285/00 ,  C08L1/00 ,  C08L27/00 ,  H01B3/44 ,  C08L27/18

    CPC分类号： H01B3/445 ,  C08F259/08 ,  C08F285/00 ,  Y10S525/902

    摘要： Fluoropolymer dispersions containing colloidal particles of a partially modified tetrafluoroethylene polymer, the fluoropolymer resin powder obtained therefrom by coagulation and a process for the preparation of the dispersions mentioned are described. The particles have a three-shell particle structure, the particle core and the other particle shell consisting of a tetrafluoroethylene polymer provided with a modifying fluoro-olefinic comonomer and the inner particle shell consisting of tetrafluoroethylene homopolymer. Fluoro-olefins, perfluoro-olefins, halogenofluoro-olefins and completely or partially fluorinated vinyl ethers are used as the modifying comonomers.The preparation is effected by the seed technique or intermediate letting down method, the modified core being formed in the first phase and the modifying comonomer being subsequently metered into the continuing tetrafluoroethylene polymerization in the second phase. The resins obtained are particularly suitable for the paste extrusion process for producing cable insulation and highly stretchable, unsintered tapes, and, after appropriate working up, also for the ram extrusion and the press-sinter technique.

    摘要翻译： 含有部分改性的四氟乙烯聚合物的胶体粒子的含氟聚合物分散体，通过凝聚得到的含氟聚合物树脂粉末和制备上述分散体的方法进行了说明。 颗粒具有三壳颗粒结构，颗粒芯和另一个颗粒壳由具有改性氟烯烃共聚单体的四氟乙烯聚合物和由四氟乙烯均聚物组成的内颗粒壳组成。 使用氟 - 烯烃，全氟烯烃，卤代氟烯烃和完全或部分氟化的乙烯基醚作为改性共聚单体。 该制备通过种子技术或中间放下方法进行，在第一相中形成改性芯，随后在第二相中将改性共聚单体计量加入连续的四氟乙烯聚合中。 所获得的树脂特别适合用于生产电缆绝缘和高度可拉伸的未烧结带的糊料挤出方法，并且在适当的加工之后也用于冲压挤出和压制 - 烧结技术。

    Copolymers of tetrafluoroethylene and process for their manufacture
    9.
    发明授权
    Copolymers of tetrafluoroethylene and process for their manufacture 失效
    四氟乙烯的共聚物及其制造方法

    公开(公告)号：US4262101A

    公开(公告)日：1981-04-14

    申请号：US97685

    申请日：1979-11-27

    申请人： Robert Hartwimmer ,  Jurgen Kuhls

    发明人： Robert Hartwimmer ,  Jurgen Kuhls

    IPC分类号： C08F14/00 ,  C08F2/16 ,  C08F14/28 ,  C08F16/00 ,  C08F16/14 ,  C08F214/26

    CPC分类号： C08F214/262

    摘要： The invention relates to a process for the copolymerization of tetrafluoroethylene with perfluorinated alkylvinyl ethers of the formulaCF.sub.3 --(CF.sub.2).sub.n --O--CF.dbd.CF.sub.2wherein n is 1 to 3, in the presence of hexafluoropropene, and the thermoplastic terpolymers so obtained. The copolymerization may be carried out according to the suspension process or the emulsion process in liquid phase in the presence of liquid chain transfer agents. In the presence of hexafluoropropene, the amount of perfluoro(alkyl vinyl) ethers incorporated in the copolymer is considerably increased. The terpolymers in accordance with this invention are distinguished by a number of interesting properties, and are useful for melt processing to shaped articles and as coating materials.

    摘要翻译： 本发明涉及四氟乙烯与六氟丙烯存在下式CF3-（CF2）n-O-CF = CF2（其中n为1至3）的全氟化烷基乙烯基醚和如此获得的热塑性三元共聚物的共聚方法。 共聚可以在液相转移剂存在下，根据悬浮法或乳液法在液相中进行。 在六氟丙烯存在下，引入到共聚物中的全氟（烷基乙烯基）醚的量显着增加。 根据本发明的三元共聚物通过许多有趣的性质来区分，并且可用于成型制品和作为涂料的熔融加工。