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    WATER-ABSORBABLE POLYACRYLIC ACID RESIN POWDER, AND PROCESS FOR PRODUCTION THEREOF
    2.
    发明公开
    WATER-ABSORBABLE POLYACRYLIC ACID RESIN POWDER, AND PROCESS FOR PRODUCTION THEREOF 有权
    VERFAHREN ZU DESSEN HERSTELLUNG的WASSERABSORBIERENDES POLYACRYLSUREURE HARBPULVER

    公开(公告)号：EP2518092A4

    公开(公告)日：2013-05-22

    申请号：EP10839528

    申请日：2010-12-23

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： NAKATSURU REIKO ,  SAKAMOTO SHIGERU ,  TORII KAZUSHI ,  TAKAAI TOSHIHIRO

    IPC分类号： C08F20/06 ,  A61L15/60 ,  C08F220/06 ,  C08J3/12

    CPC分类号： C08J3/12 ,  A61L15/48 ,  A61L15/60 ,  C08F20/06 ,  C08F220/06 ,  C08J2333/08 ,  C08J2333/10 ,  C08L33/02

    摘要： A process according to the present invention for production of water-absorbable polyacrylic acid resin powder, including: (a) polymerizing an acrylic acid-based monomer aqueous solution containing bubbles, and (b) drying a hydrogel crosslinked polymer thus obtained in the step of polymerizing, further includes (c) lowering solubility of dissolved gas in a monomer aqueous solution in the presence of a surfactant and/or a dispersing agent, so as to generate the bubbles in the acrylic acid-based monomer aqueous solution. With this arrangement, it is possible to provide white water-absorbable resin with better water absorbing rate, keeping or without significantly losing the other properties (permeability potential, bulk specific gravity, surface tension, absorbency against pressure, impact resistance, etc.)

    摘要翻译： 根据本发明的用于制造吸水性聚丙烯酸树脂粉末的方法，包括：（a）聚合含有气泡的丙烯酸类单体水溶液，和（b）将由此得到的水凝胶交联聚合物干燥， 聚合还包括（c）在表面活性剂和/或分散剂存在下降低溶解气体在单体水溶液中的溶解度，以便在丙烯酸类单体水溶液中产生气泡。 通过这种布置，可以提供具有更好吸水速率的白色吸水性树脂，保持或不显着损失其它性能（渗透性潜力，体积比重，表面张力，抗压力，抗冲击性等）

    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER
    4.
    发明公开
    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER 有权
    VERFAHREN ZUR HERSTELLUNG EINES WASSERABSERBIERENDEN HARZPULVERS AUFPOLYACRYLSÄURE（SALZ）BASIS

    公开(公告)号：EP2565219A4

    公开(公告)日：2014-04-02

    申请号：EP11775082

    申请日：2011-04-27

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： WATANABE YUSUKE ,  TORII KAZUSHI ,  NOGI KOZO ,  ISHIZAKI KUNIHIKO ,  NAKATSURU REIKO ,  SAKAMOTO SHIGERU

    IPC分类号： C08J3/12

    CPC分类号： C08J3/12 ,  C08F6/008 ,  C08F122/105 ,  C08F220/06 ,  C08J3/122 ,  C08J3/245 ,  C08J2333/02 ,  C08L33/02

    摘要： A water absorbent resin having less fine powder or powdery dust and a controlled particle size is provided, and the water absorption rate of the water absorbent resin is increased by a simple method at low cost, while maintaining or improving other physical properties such as liquid permeability. Disclosed is a method for producing a polyacrylic acid (salt)-type water absorbent resin powder, which includes, in sequence, a step of polymerizing an aqueous solution of acrylic acid (salt)-type monomer; a step of gel-crushing a gel of a water-containing gel-like crosslinked polymer during polymerization or after polymerization; a step of drying the water-containing gel-like crosslinked polymer; and a step of pulverizing and classifying the dried polymer, wherein water absorbent resin fine particles having a particle size of less than 150 µm or a hydrated-particles thereof is added to a step prior to the drying step, and in the drying step, hot air drying is carried out with a hot air having an average flow velocity of 1.0 to 3.0 [m/s], a dew point of 30°C to 100°C, and a hot air temperature of 140°C to 235°C.

    摘要翻译： 提供具有较少细粉末或粉末粉尘和受控粒度的吸水性树脂，并且通过简单的方法以低成本提高吸水性树脂的吸水率，同时保持或改善其它物理性能如液体渗透性 。 本发明公开了一种聚丙烯酸（盐）型吸水性树脂粉末的制造方法，其中，依次包括使丙烯酸（盐）型单体的水溶液聚合的工序; 在聚合过程中或聚合后凝胶化凝胶状凝胶状交联聚合物凝胶的步骤; 干燥含水凝胶状交联聚合物的工序; 以及将干燥聚合物粉碎并分级的步骤，其中在干燥步骤之前的步骤中加入粒径小于150μm的吸水性树脂细颗粒或其水合颗粒，并且在干燥步骤中，热 用平均流速为1.0〜3.0 [m / s]，露点为30〜100℃，热风温度为140〜235℃的热风进行空气干燥。