POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION
    1.
    发明公开
    POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION 审中-公开
    WÄSSRIGEPOLYTETRAUORETHYLENDISPERSION

    公开(公告)号:EP3156449A1

    公开(公告)日:2017-04-19

    申请号:EP15802859.7

    申请日:2015-06-04

    IPC分类号: C08L27/18 C08K5/00

    摘要: The present invention provides a polytetrafluoroethylene aqueous dispersion containing high-molecular-weight, significantly small polytetrafluoroethylene particles and having excellent dispersion stability. The present invention relates to an aqueous dispersion containing polytetrafluoroethylene particles containing a tetrafluoroethylene unit alone or a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with the tetrafluoroethylene. The polytetrafluoroethylene particles have a volume average particle size of not smaller than 0.1 nm but smaller than 20 nm, a melt flow rate of not lower than 0 g/10 min but lower than 80 g/10 min determined at 380°C and 5 kg load, a melting point of 324°C to 360°C, and an initial pyrolysis temperature of not lower than 400°C.

    摘要翻译: 本发明提供含有高分子量,显着小的聚四氟乙烯颗粒并且具有优异的分散稳定性的聚四氟乙烯水性分散体。 本发明涉及含有单独的四氟乙烯单元或四氟乙烯单元的聚四氟乙烯颗粒和基于可与四氟乙烯共聚的改性单体的改性单体单元的水分散体。 聚四氟乙烯颗粒的体积平均粒径不小于0.1nm但小于20nm,在380℃和5kg下测定的熔体流动速率不低于0g / 10min但低于80g / 10min 负载,熔点为324℃至360℃,初始热解温度不低于400℃。

    POLYTETRAFLUOROETHYLENE AND METHOD FOR PRODUCING SAME
    2.
    发明公开
    POLYTETRAFLUOROETHYLENE AND METHOD FOR PRODUCING SAME 有权
    POLYTETRAFLUORETHYLEN UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号:EP2409996A1

    公开(公告)日:2012-01-25

    申请号:EP10758721.4

    申请日:2010-03-30

    IPC分类号: C08F2/26 C08F14/26

    摘要: It is an object of the present invention to provide polytetrafluoroethylene suitable for forming a porous polytetrafluoroethylene film using a high water-soluble surfactant with high volatility. Polytetrafluoroethylene has non-melt-secondary-processability, standard specific gravity of 2.160 or less, an average primary particle size of 150 nm or more, stress relaxation time of 500 seconds or more, and break strength of 29.7 N or more. The polytetrafluoroethylene is obtainable by emulsion polymerization of tetrafluoroethylene in the presence of a fluorinated surfactant with LogPOW of 3.4 or less.

    摘要翻译: 本发明的目的是提供一种适用于使用具有高挥发性的高水溶性表面活性剂形成多孔聚四氟乙烯薄膜的聚四氟乙烯。 聚四氟乙烯具有非熔融二次加工性,标准比重为2.160以下,平均一次粒径为150nm以上,应力松弛时间为500秒以上,断裂强度为29.7N以上。 聚四氟乙烯可以通过四氟乙烯在LogPOW为3.4以下的氟化表面活性剂的存在下的乳液聚合而获得。

    METHOD FOR PRODUCING FLUOROPOLYMER AQUEOUS DISPERSION LIQUID
    5.
    发明公开
    METHOD FOR PRODUCING FLUOROPOLYMER AQUEOUS DISPERSION LIQUID 审中-公开
    VERFAHREN ZUR HERSTELLUNG EINERWÄSSRIGENFLUORPOLYMERDISPERSIONSFLÜSSIGKEIT

    公开(公告)号:EP3153527A1

    公开(公告)日:2017-04-12

    申请号:EP15803136.9

    申请日:2015-06-04

    IPC分类号: C08F2/24 C08F14/00

    摘要: The present invention provides a method for producing a fluoropolymer aqueous dispersion having a significantly small particle size and excellent dispersion stability. The present invention relates to a method for producing an aqueous dispersion containing at least one fluoropolymer selected from the group consisting of polytetrafluoroethylene and melt-fabricable fluororesins excluding polytetrafluoroethylene. The method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant and a polymerization initiator. The fluorosurfactant has a concentration in the aqueous medium of not lower than 0.8 times the critical micelle concentration of the fluorosurfactant.

    摘要翻译: 本发明提供一种具有显着小的粒度和优异的分散稳定性的含氟聚合物水性分散体的制造方法。 本发明涉及含有至少一种选自聚四氟乙烯和聚四氟乙烯除外的可熔融制造的氟树脂的含氟聚合物的水性分散体的制造方法。 该方法包括在含氟表面活性剂和聚合引发剂的存在下在含水介质中聚合含氟单体。 含氟表面活性剂在含水介质中的浓度不低于含氟表面活性剂的临界胶束浓度的0.8倍。