POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION

    公开(公告)号:US20170107368A1

    公开(公告)日:2017-04-20

    申请号:US15316031

    申请日:2015-06-04

    Abstract: 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.

    Production method for fluoropolymer aqueous dispersion
    175.
    发明授权
    Production method for fluoropolymer aqueous dispersion 有权
    氟聚合物水性分散体的制造方法

    公开(公告)号:US09574020B2

    公开(公告)日:2017-02-21

    申请号:US14648366

    申请日:2013-12-02

    Inventor: Yoshinori Nanba

    CPC classification number: C08F2/10 C08F2/26 C08F14/18 C08L27/18 C08L2201/54

    Abstract: The present invention aims to provide a method of producing a fluoropolymer aqueous dispersion having a significantly small particle size and excellent dispersion stability without using a long-chain fluorosurfactant. The present invention relates to a method of producing an aqueous dispersion containing at least one fluoropolymer selected from the group consisting of polytetrafluoroethylene and melt-processible fluororesins excluding polytetrafluoroethylene. The method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a fluorosurfactant having a Log POW value of not higher than 3.4 and a polymerization initiator. The amount of the fluorosurfactant corresponds to 4600 to 500000 ppm of the aqueous medium.

    Abstract translation: 本发明的目的在于提供一种在不使用长链含氟表面活性剂的情况下制造具有显着小的粒径和优异的分散稳定性的含氟聚合物水性分散体的方法。 本发明涉及含有选自聚四氟乙烯和聚四氟乙烯除外的可熔融加工的氟树脂中的至少一种含氟聚合物的水性分散体的制造方法。 该方法包括在Log POW值不高于3.4的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。 含氟表面活性剂的量对应于水性介质的4600至500000ppm。

    Water dispersible, self-crosslinkable prepolymer composition
    176.
    发明授权
    Water dispersible, self-crosslinkable prepolymer composition 有权
    水分散性,可自交联的预聚物组合物

    公开(公告)号:US09567311B2

    公开(公告)日:2017-02-14

    申请号:US14374360

    申请日:2013-01-23

    Abstract: The present invention provides an economical route to environmentally friendly polymeric coatings with a high content of raw materials from renewable resources. These polymeric coatings offer performance characteristics that are competitive with conventional coating systems. The unique polymers on which this invention is based are copolymers of triglyceride oils, such as soybean oil, linseed oil, or another natural oil, with a vinyl compound, such as an acrylate or methacrylate, or a vinyl aromatic monomer. The present invention more specifically discloses a water dispersible, self-crosslinkable prepolymer composition which is comprised of a triglyceride oil having appended thereto (1) hydroxyl groups, (2) epoxy groups, (3) moieties which contain at least one aldehyde group or at least one ketone group, and (4) moieties which contain at least one vinyl and/or substituted vinyl group. In one embodiment of this invention the moiety which contains at least one vinyl group is derived from maleic anhydride.

    Abstract translation: 本发明提供了一种从可再生资源获得原材料含量高的环保聚合物涂层的经济途径。 这些聚合物涂层具有与传统涂料体系竞争的性能特征。 本发明所基于的独特聚合物是甘油三酯油如大豆油,亚麻子油或其它天然油与乙烯基化合物如丙烯酸酯或甲基丙烯酸酯或乙烯基芳族单体的共聚物。 本发明更具体地公开了一种水分散性,可自交联的预聚物组合物,其由附有(1)羟基的甘油三酯油,(2)环氧基,(3)含有至少一个醛基的部分或 至少一个酮基,和(4)含有至少一个乙烯基和/或取代的乙烯基的部分。 在本发明的一个实施方案中,含有至少一个乙烯基的部分衍生自马来酸酐。

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