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    PROCESS FOR PRODUCING POLYTETRAFLUOROETHYLENE FINE POWDER
    11.
    发明申请
    PROCESS FOR PRODUCING POLYTETRAFLUOROETHYLENE FINE POWDER 有权
    生产聚四氟乙烯微粉的方法

    公开(公告)号：US20130122302A1

    公开(公告)日：2013-05-16

    申请号：US13810323

    申请日：2011-09-29

    申请人： Masayoshi Miyamoto ,  Taku Yamanaka ,  Yasuhiko Sawada

    发明人： Masayoshi Miyamoto ,  Taku Yamanaka ,  Yasuhiko Sawada

    IPC分类号： C08F14/26

    CPC分类号： C08F14/26 ,  C08F2/20 ,  C08F114/26 ,  C08F214/26 ,  C08J3/16 ,  C08J2327/18 ,  Y10T428/2982 ,  C08F114/24

    摘要： A process for producing a polytetrafluoroethylene fine powder including: (1) a step of preparing an aqueous dispersion containing polytetrafluoroethylene, water and a surfactant (A); (2) a step of initiating coagulation of the polytetrafluoroethylene in said aqueous dispersion by agitating said aqueous dispersion; (3) a step of adding a surfactant (B) after the step (2); (4) a step of terminating coagulation after the step (3); (5) a step of collecting a wet powder of the polytetrafluoroethylene; and (6) a step of drying the wet powder of the polytetrafluoroethylene.

    摘要翻译： 一种生产聚四氟乙烯细粉的方法，包括：（1）制备含有聚四氟乙烯，水和表面活性剂（A）的水分散体的步骤; （2）通过搅拌所述水性分散体来引发聚四氟乙烯在所述水分散体中的凝结的步骤; （3）在步骤（2）之后加入表面活性剂（B）的步骤; （4）在步骤（3）之后终止凝结的步骤; （5）收集聚四氟乙烯的湿粉末的步骤; 和（6）干燥聚四氟乙烯的湿粉末的步骤。

    AQUEOUS DISPERSION OF LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE, LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE POWDER, AND METHOD FOR PRODUCING LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE
    12.
    发明申请
    AQUEOUS DISPERSION OF LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE, LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE POWDER, AND METHOD FOR PRODUCING LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE 审中-公开
    低分子量聚偏氟乙烯，低分子量聚四氟乙烯粉末的水分散体，以及生产低分子量聚偏二氟乙烯的方法

    公开(公告)号：US20100204345A1

    公开(公告)日：2010-08-12

    申请号：US12670995

    申请日：2008-08-07

    申请人： Taku Yamanaka ,  Nobuhiko Tsuda ,  Masayuki Tsuji ,  Yasuhiko Sawada

    发明人： Taku Yamanaka ,  Nobuhiko Tsuda ,  Masayuki Tsuji ,  Yasuhiko Sawada

    IPC分类号： A61K47/32 ,  C08L27/18 ,  C08F214/26 ,  G03G9/08 ,  A61Q90/00

    CPC分类号： C08F14/26 ,  C08F2/18 ,  C08F6/16 ,  C08F6/20 ,  C08F6/22 ,  C08F214/26 ,  G03G9/0872 ,  G03G9/09766 ,  C08L27/18 ,  C08F2/20 ,  C08F2/24

    摘要： The present invention provides an aqueous dispersion of a low-molecular-weight polytetrafluoroethylene (PTFE), which contains an easily removable surfactant, and has a good dispersion stability. Specifically, the present invention provides an aqueous dispersion of a low-molecular-weight PTFE comprising tetrafluoroethylene (TFE) units, or TFE units and modifying monomer units which are copolymerizable with the TFE units, wherein the aqueous dispersion contains from 70 to 9,000 ppm, based on the aqueous dispersion, of a fluorine-containing compound of the formula (1) below: X—(CF2)m—Y  (1) where X is H or F; m is an integer from 3 to 5; and Y is —SO3M, —SO4M, —SO3R, —SO4R, —COOM, —PO3M2 or —PO4M2, M being H, NH4 or an alkali metal, and R being an alkyl group having 1 to 12 carbons, and the low-molecular-weight PTFE has an average primary particle size of from 100 to 350 nm.

    摘要翻译： 本发明提供一种低分子量聚四氟乙烯（PTFE）的水分散体，其含有易于除去的表面活性剂，并且具有良好的分散稳定性。 具体地说，本发明提供了包含四氟乙烯（TFE）单元或TFE单元的低分子量PTFE的水性分散体和可与TFE单元共聚的改性单体单元，其中，水分散体含有70〜9000ppm， 基于水分散体的下式（1）的含氟化合物：X-（CF 2）m -Y（1）其中X是H或F; m为3〜5的整数; Y是-SO 3 M，-SO 4 M，-SO 3 R，-SO 4 R，-COOM，-PO 3 M 2或-PO 4 M 2，M是H，NH 4或碱金属，R是具有1至12个碳原子的烷基， 分子量的PTFE的平均一次粒径为100〜350nm。

    Method for manufacturing fine polytetrafluoroethylene powder
    13.
    发明授权
    Method for manufacturing fine polytetrafluoroethylene powder 有权
    聚四氟乙烯细粉的制造方法

    公开(公告)号：US09006333B2

    公开(公告)日：2015-04-14

    申请号：US13876361

    申请日：2011-09-29

    申请人： Masayoshi Miyamoto ,  Taku Yamanaka ,  Yasuhiko Sawada ,  Masayuki Tsuji

    发明人： Masayoshi Miyamoto ,  Taku Yamanaka ,  Yasuhiko Sawada ,  Masayuki Tsuji

    IPC分类号： C08J3/16 ,  C08F14/26

    CPC分类号： C08J3/16 ,  C08J2327/18

    摘要： A method for manufacturing a polytetrafluoroethylene fine powder characterized by including the steps of (1) preparing an aqueous dispersion containing polytetrafluoroethylene, water, and a surfactant (A); (2) coagulating the polytetrafluoroethylene in the aqueous dispersion by agitating the aqueous dispersion with a discharge flow-type impeller; (3) collecting a wet powder of the polytetrafluoroethylene; and (4) drying the wet powder of the polytetrafluoroethylene.

    摘要翻译： 其特征在于包括以下步骤：（1）制备含有聚四氟乙烯，水和表面活性剂（A）的水性分散体的步骤; （2）通过用排出流式叶轮搅拌水分散体而使水分散体中的聚四氟乙烯凝结; （3）收集聚四氟乙烯的湿粉末; 和（4）干燥聚四氟乙烯的湿粉末。

    Low molecular weight polytetrafluoroethylene powder and preparation method therefor
    15.
    发明授权
    Low molecular weight polytetrafluoroethylene powder and preparation method therefor 有权
    低分子量聚四氟乙烯粉末及其制备方法

    公开(公告)号：US08754176B2

    公开(公告)日：2014-06-17

    申请号：US13260911

    申请日：2010-03-31

    申请人： Taku Yamanaka ,  Masayuki Tsuji ,  Shunji Kasai ,  Yasuhiko Sawada

    发明人： Taku Yamanaka ,  Masayuki Tsuji ,  Shunji Kasai ,  Yasuhiko Sawada

    IPC分类号： C08F214/26

    CPC分类号： C08F14/26 ,  C08F114/26 ,  C08F2/24 ,  C08F2/22 ,  C08F2/18

    摘要： The present invention provides a low-molecular weight polytetrafluoroethylene powder that, when used as an additive in a coating material, etc., can form a coating with excellent texture and gliding properties, while also improving dispersibility and viscosity; and a production process therefor. The present invention is a process for producing a low-molecular weight polytetrafluoroethylene powder, the process comprising: an emulsion polymerization step of polymerizing at least tetrafluoroethylene in the presence of a polymerization initiator and an aqueous medium to produce emulsified particles thereof; an agglomeration step of agglomerating the emulsified particles to form an agglomerated powder thereof; and a suspension polymerization step of polymerizing at least tetrafluoroethylene in the presence of the agglomerated powder, a polymerization initiator, and an aqueous medium.

    摘要翻译： 本发明提供一种低分子量聚四氟乙烯粉末，其在涂料等中作为添加剂使用时，可以形成具有优良质地和滑动性能的涂料，同时还可提高分散性和粘度; 及其生产工艺。 本发明是一种生产低分子量聚四氟乙烯粉末的方法，该方法包括：在聚合引发剂和水性介质存在下聚合至少四氟乙烯以产生其乳化颗粒的乳液聚合步骤; 凝聚步骤，使乳化粒子凝集，形成凝聚粉末; 和在聚集粉末，聚合引发剂和水性介质的存在下聚合至少四氟乙烯的悬浮聚合步骤。

    TETRAFLUOROETHYLENE POLYMER AND AQUEOUS DISPERSION THEREOF
    18.
    发明申请
    TETRAFLUOROETHYLENE POLYMER AND AQUEOUS DISPERSION THEREOF 有权
    四氢氟乙烯聚合物及其分散体

    公开(公告)号：US20090281231A1

    公开(公告)日：2009-11-12

    申请号：US12296865

    申请日：2007-04-13

    申请人： Shunji Kasai ,  Makoto Ono ,  Taku Yamanaka ,  Yasuhiko Sawada

    发明人： Shunji Kasai ,  Makoto Ono ,  Taku Yamanaka ,  Yasuhiko Sawada

    IPC分类号： C08F214/26 ,  C08L27/18

    CPC分类号： C08F114/26 ,  C08F14/26 ,  C08F214/26 ,  Y10T428/3154 ,  Y10T428/31544 ,  C08F2/22

    摘要： The invention provides a TFE polymer capable of providing stretched materials excellent in membrane homogeneity. The present invention is related to a tetrafluoroethylene polymer having stretchability and non-melt-processability and having a standard specific gravity of 2.140 to 2.165, wherein, with regard to the heat-of-fusion curve obtained by subjecting the tetrafluoroethylene polymer in the form of an unbaked polymer to be measured having no history of being heated to a temperature of 300° C. or higher to differential scanning calorimetry at a programming rate of 2° C./minute, the ratio between the amount of heat, S2 mJ/mg, absorbed within the temperature range of from the temperature T0° C., which is lower by 2.5° C. than the temperature Tp° C. corresponding to the minimum point on the curve (provided that 340≦Tp≦345), up to 350° C., and the amount of heat, S1 mJ/mg, absorbed within the temperature range of from 320° C. up to the above-mentioned T0° C., namely the ratio [S2/S1], is not lower than 0.90.

    摘要翻译： 本发明提供能够提供膜均匀性优异的拉伸材料的TFE聚合物。 本发明涉及具有拉伸性和非熔融加工性，标准比重为2.140〜2.165的四氟乙烯聚合物，其中，对于通过使四氟乙烯聚合物以 在2℃/分钟的编程速度下，没有被加热到300℃以上的温度的历史上未测定的未焙烧的聚合物，差示扫描量热法，热量之比S2mJ / mg 在与曲线上最小点相对应的温度Tp°C（比340 <= Tp <= 345）更低的温度T0°C的温度范围内吸收， 高达350℃，在320℃至上述T0℃的温度范围内吸收的热量S1mJ / mg，即[S2 / S1]比为 不低于0.90。