Tetrafluoroethylene polymer and aqueous dispersion thereof
    1.
    发明授权
    Tetrafluoroethylene polymer and aqueous dispersion thereof 有权
    四氟乙烯聚合物及其水分散体

    公开(公告)号:US07820775B2

    公开(公告)日:2010-10-26

    申请号:US12296865

    申请日:2007-04-13

    IPC分类号: C08F14/18

    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 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,将没有被加热到300℃以上的温度的历史记录到差示扫描量热法中,待测量的未焙烧聚合物的比例S2 / S1不低于0.90。

    TETRAFLUOROETHYLENE POLYMER AND AQUEOUS DISPERSION THEREOF
    4.
    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

    IPC分类号: C08F214/26 C08L27/18

    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。

    LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE POWDER AND PREPARATION METHOD THEREFOR
    8.
    发明申请
    LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE POWDER AND PREPARATION METHOD THEREFOR 有权
    低分子量聚四氟乙烯粉及其制备方法

    公开(公告)号:US20120101214A1

    公开(公告)日:2012-04-26

    申请号:US13260911

    申请日:2010-03-31

    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。

    Low molecular weight polytetrafluoroethylene powder and preparation method therefor
    9.
    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

    IPC分类号: C08F214/26

    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。