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    Fine powders of polytetrafluoroethylene
    3.
    发明授权
    Fine powders of polytetrafluoroethylene 有权
    聚四氟乙烯细粉

    公开(公告)号：US06479591B2

    公开(公告)日：2002-11-12

    申请号：US09907821

    申请日：2001-07-19

    申请人： Valery Kapeliouchko ,  Enrico Marchese

    发明人： Valery Kapeliouchko ,  Enrico Marchese

    IPC分类号： C08L2712

    CPC分类号： C08F259/08

    摘要： Fine powders of modified PTFE having a “core-shell” structure; the fine powder being formed by: a “core” of tetrafluoroethylene (TFE) modified by one or more monomers selected from: a) dioxoles; b) one or more perfluorinated monomers which cyclize during the polymerization; a “shell” of TFE modified by perfluoropropene (PFP); the amount, referred to the total core+shell particle, of comonomers 1) in the “core” being in the range 0.01-0.06% by weight; the amount, referred to the total core+shell particle, of perfluoropropene 2) in the “shell” being in the range 0.002-0.06% by weight; the thermal instability index (TII) of the fine powder being equal to or lower than 5, determined according to ASTM D4895.

    摘要翻译： 具有“核 - 壳”结构的改性PTFE的细粉末; 该细粉末由以下一种或多种单体改性的四氟乙烯（TFE）的“芯”形成：a）二氧杂环戊烯; b）在聚合过程中环化的一种或多种全氟化单体;由TFE改性的TFE的“壳” 全氟丙烯（PFP）; “芯”中的共聚单体1）的总核心+壳粒子的量在0.01-0.06重量％的范围内; “壳”中的全氟丙烯2的总核+壳粒子的量，在0.002-0.06重量％范围内;细粉末的热不稳定指数（TII）等于或小于5 ，根据ASTM D4895测定。

    Process for preparing modified PTFE
    4.
    发明授权
    Process for preparing modified PTFE 失效
    改性PTFE的制备方法

    公开(公告)号：US06262209B1

    公开(公告)日：2001-07-17

    申请号：US09235407

    申请日：1999-01-22

    申请人： Valery Kapeliouchko ,  Enrico Marchese

    发明人： Valery Kapeliouchko ,  Enrico Marchese

    IPC分类号： C08F21426

    CPC分类号： C08F214/262

    摘要： Method for preparing modified PTFE by suspension, wherein as comonomers perfluoroalkylvinylethers in which the alkyl has from 1 to 5 carbon atoms, and/or a perfluorodioxole are used, characterized by the following conditions: a part of the comonomer, from 15 to 90% by weight of the total amount is to be fed at the beginning of the reaction; the remaining part of the comonomer is to be distributed during the reaction so as to obtain a constant speed of the comonomer incorporation in the polymer chain; a perfluorinated surfactant and a buffering salt are used; a persulphate with a reducing agent is used as initiator in such a ratio as to generate a part of the radicals from the redox reaction and another one from the persulphate thermal decomposition; one operates with a polymerization pressure from 15 to 30 bar.

    摘要翻译： 通过悬浮液制备改性PTFE的方法，其中使用其中烷基具有1至5个碳原子的共聚单体全氟烷基乙烯基醚和/或全氟二恶烷，其特征在于以下条件：一部分共聚单体为15〜90％ 总量的重量在反应开始时进料; 共聚单体的剩余部分将在反应期间分布，以获得聚合物链中共聚单体引入的恒定速度;使用全氟化表面活性剂和缓冲盐;将具有还原剂的过硫酸盐用作引发剂 这种比例从氧化还原反应产生一部分自由基，另一种来自过硫酸盐热分解;一种以15至30巴的聚合压力进行操作。

    Process for the preparation of aqueous dispersions of fluoropolymers
    6.
    发明授权
    Process for the preparation of aqueous dispersions of fluoropolymers 失效
    制备含氟聚合物水分散体的方法

    公开(公告)号：US06576703B2

    公开(公告)日：2003-06-10

    申请号：US09789728

    申请日：2001-02-22

    申请人： Valery Kapeliouchko ,  Enrico Marchese

    发明人： Valery Kapeliouchko ,  Enrico Marchese

    IPC分类号： C08L2712

    CPC分类号： C08F259/08 ,  C08F2/26 ,  C08F14/26 ,  C08F2/16

    摘要： Process for the preparation of a dispersion based on homopolymers/copolymers of tetrafluoroethylene (TFE), said dispersion having a bimodal or multimodal distribution of the particle diameters, wherein the fraction of small particles is in the range 1.5-35% by weight calculated on the dry product; the ratio between the average diameter of the small particles with respect to the average diameter of the dispersion obtained from the polymerization being in the range 0.02-0.6; said process comprising the following essential steps: (a) preparation of an aqueous microemulsion comprising fluorinated surfactants and (per)fluoropolyether oils (PFPE); (b) feeding of the microemulsion into the polymerization reactor; (c) feeding of at least one fluorinated surfactant.

    摘要翻译： 用于制备基于四氟乙烯（TFE）的均聚物/共聚物的分散体的方法，所述分散体具有粒径的双峰或多峰分布，其中小颗粒的分数为1.5〜35重量％ 干燥产品; 小颗粒的平均直径相对于由聚合得到的分散体的平均直径的比在0.02-0.6的范围内; 所述方法包括以下必要步骤：（a）制备包含氟化表面活性剂和（全）氟聚醚油（PFPE）的水性微乳液;（b）将微乳液进料到聚合反应器中;（c）进料至少一种氟化 表面活性剂。

    TFE polymerization process
    7.
    发明授权
    TFE polymerization process 有权
    TFE聚合工艺

    公开(公告)号：US06297334B1

    公开(公告)日：2001-10-02

    申请号：US09343237

    申请日：1999-06-30

    申请人： Enrico Marchese ,  Valery Kapeliouchko ,  Pasqua Colaianna

    发明人： Enrico Marchese ,  Valery Kapeliouchko ,  Pasqua Colaianna

    IPC分类号： C08F1426

    CPC分类号： C08F14/26 ,  C08F283/06 ,  Y10S526/909 ,  Y10S526/911 ,  C08F2/16 ,  C08F214/26

    摘要： Process for the preparation of tetrafluoroethylene (TFE) polymer-based dispersions having diameter average sizes in the range 0.005-0.06 &mgr;m, which comprises: a) preparation of an aqueous perfluoropolyether (PFPE) microemulsion; b) microemulsion feeding into the polymerization reactor, in such amounts so that the microemulsion perfluoropolyetheral oil phase is present in a concentration higher than 2 ml for liter of reaction medium; c) reaction medium feeding in the gaseous TFE polymerization reactor, optional addition of surfactants, stabilizers, comonomers, transfer agents; d) addition of the initiator, stabilizers, comonomers and transfer agents; e) discharge from the reactor of the polymeric latex.

    摘要翻译： 制备直径平均尺寸在0.005-0.06μm的四氟乙烯（TFE）聚合物基分散体的方法，其包括：a）制备全氟聚醚（PFPE）微乳液; b）将微乳液进料到聚合反应器中， 这样的量使得微乳液全氟聚醚油相以升于1升反应介质中的浓度高于2ml; c）在气态TFE聚合反应器中进料的反应介质，任选加入表面活性剂，稳定剂，共聚单体，转移剂; d） 加入引发剂，稳定剂，共聚单体和转移剂; e）从聚合物胶乳的反应器中排出。

    Mixtures of fluoropolymer dispersions
    9.
    发明授权
    Mixtures of fluoropolymer dispersions 失效
    含氟聚合物分散体的混合物

    公开(公告)号：US06660798B1

    公开(公告)日：2003-12-09

    申请号：US09588625

    申请日：2000-06-07

    申请人： Enrico Marchese ,  Mario Visca ,  Daria Lenti

    发明人： Enrico Marchese ,  Mario Visca ,  Daria Lenti

    IPC分类号： C08K300

    CPC分类号： D06M15/256 ,  C08L27/18 ,  C08L2205/02 ,  C09D127/18 ,  C08L2666/04

    摘要： Mixtures of fluoropolymer dispersions comprising: a) one or more dispersions constituted by TFE homopolymers or by its copolymers with particle average sizes ranging from 180 to 400 nm; b) one or more TFE copolymer dispersions with one or more monomers containing at least one ethylene unsaturation, the comonomer amount being such that the dispersion contains a number of fibrils lower than 10% of the total number of particles; said fibrils being polymer particles having a length/diameter (L/D) ratio higher than 5; the dispersion particle average sizes are smaller of about 90 nm; the component b) contains a comonomer amount such that the resulting polymer is not elastomeric and furthermore it shows composition and viscosity characteristics of the melt such as not to be thermoprocessable.

    摘要翻译： 含氟聚合物分散体的混合物包括：a）由TFE均聚物或其平均尺寸范围为180-400nm的共聚物制成的一种或多种分散体; b）一种或多种TFE共聚物分散体与一种或多种含有至少一个乙烯不饱和度的单体 共聚单体的量使得分散体含有低于总颗粒数的10％的多个原纤维; 所述原纤维是长度/直径（L / D）比高于5的聚合物颗粒; 分散颗粒的平均尺寸小于约90nm; 组分b）包含共聚单体的量，使得所得聚合物不是弹性体，此外它显示熔体的组成和粘度特性，例如不是热可加工的。

    Fluoropolymer dispersions
    10.
    发明授权
    Fluoropolymer dispersions 失效
    含氟聚合物分散体

    公开(公告)号：US06359044B1

    公开(公告)日：2002-03-19

    申请号：US09881696

    申请日：2001-06-18

    申请人： Valerio Biancardi ,  Enrico Marchese ,  Fabio Polastri

    发明人： Valerio Biancardi ,  Enrico Marchese ,  Fabio Polastri

    IPC分类号： C08K543

    CPC分类号： C08J3/03 ,  C08J2327/18

    摘要： Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes: Rf—L—(OCH(R1)—CH(R2))n—O—A  (I) wherein: n is an integer comprised between 4 and 60; L is selected from: —(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—; —(CF(Y)—SO2—NH)pR′—; wherein: p is 0 or 1; Y can be F or CF3; R′ is an alkylic radical C1-C5; R1, R2 can preferably be both H or the former H and the latter CH3, Rf can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; A is selected from the following ones: —H; —CH, —CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, CH3, COCH3; —CONHCH2CH2OH.

    摘要翻译： 含有氢化非离子表面活性剂和氟化非离子表面活性剂的含氟聚合物水性分散体，其选自以下类别：其中：n是4至60之间的整数; L选自： - （CF（Y）-CO-O）pR'- ; - （CF（Y）-CO-NH）pR' - ; - （CF（Y）-SO2-NH）pR' - ;其中：p为0或1; Y可以是F或CF3; R'是烷基基团C 1 -C 5; R 1，R 2可优选同时为H或前者H，后者为CH 3，R f可为4-至20个C原子的（全）氟烷烃基团或（全）氟聚醚 类型; A从以下选项中选择：-H; -CH，-CH 2 OH; -CH 2 OCH 2 CH 2 OH; -CH 2（OCH 2 CH 2）n“'OR'其中n”是2和15之间的整数，R'是H，CH 3，COCH 3; -CONHCH2CH2OH。