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    Water-absorbable polyacrylic acid resin powder, and process for production thereof
    3.
    发明授权
    Water-absorbable polyacrylic acid resin powder, and process for production thereof 有权
    吸水性聚丙烯酸树脂粉末及其制造方法

    公开(公告)号：US09334376B2

    公开(公告)日：2016-05-10

    申请号：US13518438

    申请日：2010-12-23

    申请人： Reiko Nakatsuru ,  Shigeru Sakamoto ,  Kazushi Torii ,  Toshihiro Takaai

    发明人： Reiko Nakatsuru ,  Shigeru Sakamoto ,  Kazushi Torii ,  Toshihiro Takaai

    IPC分类号： B01J20/26 ,  C08J3/12 ,  C08F220/06 ,  A61L15/48 ,  A61L15/60 ,  C08F20/06

    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）使含有气泡的丙烯酸类单体水溶液聚合，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，耐冲击性等）

    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER
    4.
    发明申请
    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER 有权
    生产聚丙烯酸（盐） - 水吸收树脂粉末的方法

    公开(公告)号：US20130102750A1

    公开(公告)日：2013-04-25

    申请号：US13643682

    申请日：2011-04-27

    申请人： Yusuke Watanabe ,  Kazushi Torii ,  Kozo Nogi ,  Kunihiko Ishizaki ,  Reiko Nakatsuru ,  Shigeru Sakamoto

    发明人： Yusuke Watanabe ,  Kazushi Torii ,  Kozo Nogi ,  Kunihiko Ishizaki ,  Reiko Nakatsuru ,  Shigeru Sakamoto

    IPC分类号： C08J3/12 ,  C08F122/10

    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质如液体渗透性 。 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分级的步骤，其中将粒径小于150μm的吸水性树脂细颗粒或其水合物颗粒加入到干燥步骤之前的步骤中，并且在干燥步骤中，热 使用平均流速为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 C。

    Method for producing polyacrylic acid (salt) type water absorbent resin powder
    5.
    发明授权
    Method for producing polyacrylic acid (salt) type water absorbent resin powder 有权
    聚丙烯酸（盐）型吸水性树脂粉末的制造方法

    公开(公告)号：US08765906B2

    公开(公告)日：2014-07-01

    申请号：US13643682

    申请日：2011-04-27

    申请人： Yusuke Watanabe ,  Kazushi Torii ,  Kozo Nogi ,  Kunihiko Ishizaki ,  Reiko Nakatsuru ,  Shigeru Sakamoto

    发明人： Yusuke Watanabe ,  Kazushi Torii ,  Kozo Nogi ,  Kunihiko Ishizaki ,  Reiko Nakatsuru ,  Shigeru Sakamoto

    IPC分类号： C08G63/02 ,  C08G63/00

    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质如液体渗透性 。 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; 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的吸水性树脂微粒或其水合颗粒，并且在干燥步骤中，热 使用平均流速为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 C。

    WATER-ABSORBABLE POLYACRYLIC ACID RESIN POWDER, AND PROCESS FOR PRODUCTION THEREOF
    6.
    发明申请
    WATER-ABSORBABLE POLYACRYLIC ACID RESIN POWDER, AND PROCESS FOR PRODUCTION THEREOF 有权
    水可吸收聚丙烯酸树脂粉及其生产方法

    公开(公告)号：US20120258851A1

    公开(公告)日：2012-10-11

    申请号：US13518438

    申请日：2010-12-23

    申请人： Reiko Nakatsuru ,  Shigeru Sakamoto ,  Kazushi Torii ,  Toshihiro Takaai

    发明人： Reiko Nakatsuru ,  Shigeru Sakamoto ,  Kazushi Torii ,  Toshihiro Takaai

    IPC分类号： B01J20/26 ,  B01J20/32 ,  B01J20/30

    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）使含有气泡的丙烯酸类单体水溶液聚合，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，耐冲击性等）

    Method for producing polyacrylic acid (salt)-based water absorbent resin powder
    7.
    发明授权
    Method for producing polyacrylic acid (salt)-based water absorbent resin powder 有权
    制备聚丙烯酸（盐）基吸水树脂粉末的方法

    公开(公告)号：US09567414B2

    公开(公告)日：2017-02-14

    申请号：US13982166

    申请日：2012-01-30

    申请人： Kozo Nogi ,  Masatoshi Nakamura ,  Hirofumi Shibata ,  Koji Honda ,  Yusuke Watanabe ,  Satoshi Matsumoto ,  Reiko Nakatsuru ,  Kunihiko Ishizaki ,  Kazuki Kimura ,  Sayaka Machida

    发明人： Kozo Nogi ,  Masatoshi Nakamura ,  Hirofumi Shibata ,  Koji Honda ,  Yusuke Watanabe ,  Satoshi Matsumoto ,  Reiko Nakatsuru ,  Kunihiko Ishizaki ,  Kazuki Kimura ,  Sayaka Machida

    IPC分类号： C08F20/06 ,  C08F220/06 ,  C08J3/12 ,  C09D133/04 ,  C08J3/24

    CPC分类号： C08F20/06 ,  C08F220/06 ,  C08J3/12 ,  C08J3/24 ,  C08J3/245 ,  C08J2333/02 ,  C09D133/04 ,  C08F2222/1013

    摘要： From a view point of reduction in an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence by an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct, and there is provided a process for producing a polyacrylic acid (salt)-based water absorbent resin powder, comprising a step of polymerizing an aqueous acrylic acid (salt)-based monomer solution, a step of drying the resulting polymer, an optional grinding•classifying step, and a surface crosslinking step, wherein in the surface crosslinking step, (1) a surface crosslinking agent containing an alkylene carbonate compound and a polyhydric alcohol compound is mixed into a water absorbent resin powder, the mixture is heat-reacted and, further, simultaneously with, or separately from the mixing, an ion reactive surface crosslinking agent is mixed, and/or (2) mixing treatment of mixing a surface crosslinking agent solution into a water absorbent resin powder containing at least one or more kinds of ion reactive surface crosslinking agents is performed two or more times.

    摘要翻译： 从表面交联后的特定产品的减少的观点来看，特别是使用碳酸亚烷基酯化合物作为表面交联剂时，由于空气温度的影响大，所以需要还原所生成的乙二醇 作为副产物，并且提供了一种制备基于聚丙烯酸（盐）的吸水性树脂粉末的方法，包括使基于丙烯酸（盐）的单体水溶液聚合的步骤，干燥所得聚合物的步骤， 任选的研磨分级步骤和表面交联步骤，其中在表面交联步骤中，（1）将含有碳酸亚烃酯化合物和多元醇化合物的表面交联剂混合到吸水性树脂粉末中，将混合物加热 和/或（2）混合表面的混合处理，和/或（2）混合表面的混合处理 交联剂溶液进入含有至少一种或多种离子反应性表面交联剂的吸水性树脂粉末中进行两次或更多次。

    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER
    8.
    发明申请
    METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER 有权
    生产聚丙烯酸（盐） - 水吸收树脂粉末的方法

    公开(公告)号：US20140031473A1

    公开(公告)日：2014-01-30

    申请号：US13982166

    申请日：2012-01-30

    申请人： Kozo Nogi ,  Masatoshi Nakamura ,  Hirofumi Shibata ,  Koji Honda ,  Yusuke Watanabe ,  Satoshi Matsumoto ,  Reiko Nakatsuru ,  Kunihiko Ishizaki ,  Kazuki Kimura ,  Sayaka Machida

    发明人： Kozo Nogi ,  Masatoshi Nakamura ,  Hirofumi Shibata ,  Koji Honda ,  Yusuke Watanabe ,  Satoshi Matsumoto ,  Reiko Nakatsuru ,  Kunihiko Ishizaki ,  Kazuki Kimura ,  Sayaka Machida

    IPC分类号： C08F20/06

    CPC分类号： C08F20/06 ,  C08F220/06 ,  C08J3/12 ,  C08J3/24 ,  C08J3/245 ,  C08J2333/02 ,  C09D133/04 ,  C08F2222/1013

    摘要： From a viewpoint of reduction in an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence by an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct, and there is provided a process for producing a polyacrylic acid (salt)-based water absorbent resin powder, comprising a step of polymerizing an aqueous acrylic acid (salt)-based monomer solution, a step of drying the resulting polymer, an optional grinding•classifying step, and a surface crosslinking step, wherein in the surface crosslinking step, (1) a surface crosslinking agent containing an alkylene carbonate compound and a polyhydric alcohol compound is mixed into a water absorbent resin powder, the mixture is heat-reacted and, further, simultaneously with, or separately from the mixing, an ion reactive surface crosslinking agent is mixed, and/or (2) mixing treatment of mixing a surface crosslinking agent solution into a water absorbent resin powder containing at least one or more kinds of ion reactive surface crosslinking agents is performed two or more times.

    摘要翻译： 从表面交联后的特定产品的减少的观点出发，特别是使用碳酸亚烷基酯化合物作为表面交联剂时，空气温度的影响大，需要将生成的乙二醇 副产物，并且提供了一种生产聚丙烯酸（盐）基吸水性树脂粉末的方法，包括使基于丙烯酸（盐）的单体水溶液聚合的步骤，干燥所得聚合物的步骤， 任选的研磨分级步骤和表面交联步骤，其中在表面交联步骤中，（1）将含有碳酸亚烃酯化合物和多元醇化合物的表面交联剂混合到吸水性树脂粉末中， 与混合反应，进一步，同时或分开地混合，离子反应性表面交联剂混合，和/或（2）混合处理混合表面cr 将含有至少一种以上离子反应性表面交联剂的吸水性树脂粉末中的脱硫剂溶液进行两次以上。

    Polyacrylic acid (salt)-based water absorbent resin powder and method for producing the same
    9.
    发明授权
    Polyacrylic acid (salt)-based water absorbent resin powder and method for producing the same 有权
    聚丙烯酸（盐）系吸水树脂粉末及其制造方法

    公开(公告)号：US09044525B2

    公开(公告)日：2015-06-02

    申请号：US14129792

    申请日：2012-06-29

    申请人： Kazushi Torii ,  Reiko Nakatsuru ,  Yasuhisa Nakashima ,  Katsuyuki Wada ,  Kunihiko Ishizaki

    发明人： Kazushi Torii ,  Reiko Nakatsuru ,  Yasuhisa Nakashima ,  Katsuyuki Wada ,  Kunihiko Ishizaki

    IPC分类号： A61L15/26 ,  A61L15/60 ,  C08F20/06 ,  C08J3/24 ,  C08K5/00 ,  C08L33/02 ,  C08K5/17

    CPC分类号： A61L15/26 ,  A61L15/60 ,  C08F20/06 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02 ,  C08K5/0091 ,  C08K5/175 ,  C08L33/02 ,  Y10T428/2982 ,  C08F2222/1013

    摘要： Provided is a water absorbent resin having excellent liquid permeability, water absorbent speed, anti-impact stability, and weather resistance. Provided is a polyacrylic acid (salt)-based water absorbent resin powder in which the water absorption capacity without load (CRC) is 30 to 45 [g/g], the water absorption capacity under load (AAP 0.3) is 20 to 35 [g/g], the water absorption capacity under load (AAP 0.7) is 10 to 28 [g/g], and the weight average particle diameter (D50) is 300 to 500 μm, characterized by including p-methoxyphenol; having a degradable soluble component (0.05% L-A (saline) for 2 hours/60° C., one hour extraction rinse/room temperature) of 40% by weight or less; and having a internal gas bubbles ratio of 0.1 to 2.5%, as specified by the following equation. (Internal gas bubbles ratio)[%]={(True density)−(Apparent density)}/(True density)×100

    摘要翻译： 提供具有优异的透液性，吸水速度，抗冲击稳定性和耐候性的吸水性树脂。 本发明提供无负载吸水能力（CRC）为30〜45 [g / g]的聚丙烯酸（盐）系吸水性树脂粉末，负荷吸水量（AAP 0.3）为20〜35 [ g / g]，负荷下的吸水量（AAP 0.7）为10〜28 [g / g]，重均粒径（D50）为300〜500μm，其特征在于包括对甲氧基苯酚; 具有40重量％以下的可降解可溶成分（0.05％L-A（盐水）2小时/ 60℃，1小时萃取冲洗/室温） 内部气泡比为0.1〜2.5％，如下式所示。 （内部气泡比）[％] = {（真密度） - （表观密度）} /（真密度）×100

    Polyacrylic Acid (Salt)-Based Water Absorbent Resin Powder and Method for Producing the Same
    10.
    发明申请
    Polyacrylic Acid (Salt)-Based Water Absorbent Resin Powder and Method for Producing the Same 有权
    聚丙烯酸（盐）基吸水树脂粉及其制备方法

    公开(公告)号：US20140193641A1

    公开(公告)日：2014-07-10

    申请号：US14129792

    申请日：2012-06-29

    申请人： Kazushi Torii ,  Reiko Nakatsuru ,  Yasuhisa Nakashima ,  Katsuyuki Wada ,  Kunihiko Ishizaki

    发明人： Kazushi Torii ,  Reiko Nakatsuru ,  Yasuhisa Nakashima ,  Katsuyuki Wada ,  Kunihiko Ishizaki

    IPC分类号： A61L15/26 ,  A61L15/60

    CPC分类号： A61L15/26 ,  A61L15/60 ,  C08F20/06 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02 ,  C08K5/0091 ,  C08K5/175 ,  C08L33/02 ,  Y10T428/2982 ,  C08F2222/1013

    摘要： Provided is a water absorbent resin having excellent liquid permeability, water absorbent speed, anti-impact stability, and weather resistance. Provided is a polyacrylic acid (salt)-based water absorbent resin powder in which the water absorption capacity without load (CRC) is 30 to 45 [g/g], the water absorption capacity under load (AAP 0.3) is 20 to 35 [g/g], the water absorption capacity under load (AAP 0.7) is 10 to 28 [g/g], and the weight average particle diameter (D50) is 300 to 500 μm, characterized by including p-methoxyphenol; having a degradable soluble component (0.05% L-A (saline) for 2 hours/60° C., one hour extraction rinse/room temperature) of 40% by weight or less; and having a internal gas bubbles ratio of 0.1 to 2.5%, as specified by the following equation. (Internal gas bubbles ratio)[%]={(True density)−(Apparent density)}/(True density)×100

    摘要翻译： 提供具有优异的透液性，吸水速度，抗冲击稳定性和耐候性的吸水性树脂。 本发明提供无负载吸水能力（CRC）为30〜45 [g / g]的聚丙烯酸（盐）系吸水性树脂粉末，负荷吸水量（AAP 0.3）为20〜35 [ g / g]，负荷下的吸水量（AAP 0.7）为10〜28 [g / g]，重均粒径（D50）为300〜500μm，其特征在于包括对甲氧基苯酚， 具有40重量％以下的可降解可溶成分（0.05％L-A（盐水）2小时/ 60℃，1小时萃取冲洗/室温） 内部气泡比为0.1〜2.5％，如下式所示。 （内部气泡比）[％] = {（真密度） - （表观密度）} /（真密度）×100