Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions
    5.
    发明申请
    Process for reducing the amount of fluorinated surfactant in aqueous fluoropolymer dispersions 审中-公开
    用于降低含氟聚合物水分散体中氟化表面活性剂的量的方法

    公开(公告)号:US20050070633A1

    公开(公告)日:2005-03-31

    申请号:US10992961

    申请日:2004-11-19

    IPC分类号: C08F6/16 C08L27/12 C08L1/00

    CPC分类号: C08F6/16 C08F6/20 C08L27/12

    摘要: The present invention provides a process of reducing the amount of fluorinated emulsifier in an aqueous fluoropolymer dispersion by contacting the aqueous fluoropolymer dispersion with an anion exchange resin in a non-fixed resin bed, the process comprising: (a) mixing the aqueous fluoropolymer dispersion with an effective amount of a surfactant so as to stabilize the fluoropolymer dispersion while being contacted with the anion exchange resin; (b) contacting the aqueous fluoropolymer dispersion with an anion exchange resin by agitating the aqueous fluoropolymer dispersion with an effective amount of anion exchange resin for a time of less than 4 hours to reduce the amount of fluorinated emulsifier in the aqueous fluoropolymer dispersion to a desired level; and (c) separating the anion exchange resin from the aqueous fluoropolymer dispersion.

    摘要翻译: 本发明提供一种通过使含氟聚合物含水分散体与阴离子交换树脂在非固定树脂床中接触来降低含氟聚合物水分散体含量的方法,该方法包括:(a)将含氟聚合物水分散体与 有效量的表面活性剂,以便在与阴离子交换树脂接触的同时稳定含氟聚合物分散体; (b)通过用有效量的阴离子交换树脂搅拌含氟聚合物水分散体少于4小时使含氟聚合物含水分散体与阴离子交换树脂接触,将含氟聚合物水分散体中的氟化乳化剂的量减少到所需的 水平; 和(c)从含氟聚合物含水分散体中分离阴离子交换树脂。

    Method of recovering fluorinated acid surfactants from adsorbent particles loaded therewith
    7.
    发明申请
    Method of recovering fluorinated acid surfactants from adsorbent particles loaded therewith 有权
    从装载有吸附剂的颗粒中回收氟化表面活性剂的方法

    公开(公告)号:US20050177000A1

    公开(公告)日:2005-08-11

    申请号:US11036432

    申请日:2005-01-14

    IPC分类号: C07C51/493 C07C53/21

    CPC分类号: C07C51/493 C07C53/21

    摘要: The present invention provides a method of recovering a fluorinated acid surfactant or salt thereof from adsorbent particles to which said fluorinated acid surfactant has been adsorbed. The method comprises mixing adsorbent particles having adsorbed fluorinated acid surfactant or salt thereof with an alcohol and optionally an acid. The mixture is generally heated to cause esterification of the fluorinated acid surfactant or salt thereof with the alcohol so as to form an ester derivative of the fluorinated acid surfactant, distilling the mixture to form a distillate comprising the ester derivative, separating the ester derivative from the distillate and optionally feeding the remainder of the distillate back into the mixture.

    摘要翻译: 本发明提供一种从吸附了氟化酸表面活性剂的吸附剂颗粒中回收氟化酸表面活性剂或其盐的方法。 该方法包括将具有吸附的氟化酸表面活性剂或其盐的吸附剂颗粒与醇和任选的酸混合。 通常加热混合物以使氟化酸表面活性剂或其盐与醇进行酯化,以形成氟化酸表面活性剂的酯衍生物,蒸馏该混合物以形成包含酯衍生物的馏出物,将酯衍生物与 馏出物和任选地将剩余的馏出物反馈回混合物中。

    Aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer and having a reduced amount of fluorinated surfactant
    9.
    发明申请
    Aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer and having a reduced amount of fluorinated surfactant 审中-公开
    包含可熔融加工的含氟聚合物并且具有减少量的氟化表面活性剂的含水氟聚合物分散体

    公开(公告)号:US20050043471A1

    公开(公告)日:2005-02-24

    申请号:US10933738

    申请日:2004-09-03

    IPC分类号: C08F2/00 C08F6/16 C09D127/12

    摘要: The present invention provides an aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer in an amount of at least 25% by weight based on the weight of the aqueous fluoropolymer dispersion and a fluorinated surfactant having a molecular weight of not more than 1000 g/mol in an amount of not more than 100 ppm, preferably less than 50 ppm, more preferably less than 25 ppm and most preferably less than 10 ppm based on the weight of fluoropolymer solids or being free of said fluorinated surfactant. The aqueous fluoropolymer dispersion has a conductivity of at least 200 μS/cm, preferably at least 500 μS/cm and more preferably at least 1000 μS/cm.

    摘要翻译: 本发明提供一种含氟聚合物含水聚合物,其含有至少25重量%的可熔融加工的含氟聚合物,其含量基于含氟聚合物水分散体的含量和分子量不超过1000g / mol的氟化表面活性剂 相对于含氟聚合物固体的重量或不含所述氟化表面活性剂,其量不超过100ppm,优选小于50ppm,更优选小于25ppm,最优选小于10ppm。 含氟聚合物水分散体的电导率为至少200μS/ cm,优选为至少500μS/ cm,更优选为至少1000μS/ cm。