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1. 发明授权

US11602577B2 Water-absorbing agent and method for producing same, and absorbent article produced using water-absorbing agent 有权
公开(公告)号：US11602577B2
公开(公告)日：2023-03-14
申请号：US16088638
申请日：2017-03-28
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazuki Kimura , Nobuya Tanaka , Yuki Tanaka , Daisuke Takeda
IPC分类号： B01J20/02 , B01J20/26 , A61L15/24 , C08F20/06 , C08J3/12 , A61L15/60 , C08F220/06 , C08L33/02 , B29B9/12 , C08J3/075 , C08J3/24 , B01J20/28 , B01J20/30 , A61F13/53
摘要： Provided is a water-absorbing agent having an excellent ability to absorb and retain liquid and an excellent liquid suction power. The water-absorbing agent contains a polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfies all of the following physical properties (a) to (e): (a) a weight average particle diameter (D50) is 300 μm or more and less than 400 μm; (b) a proportion of particles with a particle diameter of 600 μm or more and less than 850 μm is less than 10 weight %; (c) an average gap radius is 100 μm or more and less than 180 μm; (d) a CRC is 28 g/g or more and less than 34 g/g; and (e) an AAP is 24 g/g or more.

2. 发明申请

US20150225514A1 METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBING AGENT, AND WATER ABSORBING AGENT 审中-公开
标题翻译：生产聚丙烯酸（盐） - 水吸收剂和吸水剂的方法
公开(公告)号：US20150225514A1
公开(公告)日：2015-08-13
申请号：US14426802
申请日：2013-08-20
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazuki Kimura , Yusuke Watanabe , Sayaka Machida , Taku Fujimoto , Kenji Kadonaga
IPC分类号： C08J3/24 , A61L15/60 , A61L15/24
CPC分类号： C08J3/245 , A61L15/24 , A61L15/60 , B01J20/267 , C08F220/06 , C08J3/247 , C08J2333/02 , C08F2222/108
摘要： An object of the present invention is to provide a method for producing a water absorbing agent, whereby the ability to produce the water absorbing agent is enhanced or the amount of a residual surface crosslinking agent is reduced (or Anti-Caking property are enhanced) in the production of a water absorbing agent having high physical properties (particularly, high liquid permeability and Anti-Caking property), whereas the surface crosslinking step tends to be a rate-determining step in the current state of the art. In this method for producing a water absorbing agent, an additive selected from a polyvalent metal cation-containing compound, water-insoluble inorganic fine particles, and a cationic polymer compound is used, and surface crosslinking, particularly surface crosslinking with an alkylene carbonate compound, is performed under conditions where a temperature in a heat treatment system is controlled to be in a range from 100° C. to 300° C., and a dew point in the heat treatment system is controlled to be lower than 45° C.
摘要翻译：本发明的目的在于提供一种吸水剂的制造方法，其中提高了吸水剂的制造能力，或者减少了残留的表面交联剂的量（或抗结块性提高）生产具有高物理性能（特别是高透液性和抗结块性）的吸水剂，而表面交联步骤往往是现有技术中的速率确定步骤。在这种吸水剂的制造方法中，使用选自含有多价金属阳离子的化合物，水不溶性无机微粒和阳离子性高分子化合物的添加剂，表面交联，特别是与碳酸亚烃酯化合物的表面交联，在将热处理系统的温度控制在100℃〜300℃的范围的条件下进行，并且将热处理系统中的露点控制在低于45℃。

3. 发明授权

US10934031B2 Method for filling particulate water absorbing agent and method for sampling filled particulate water absorbing agent 有权
公开(公告)号：US10934031B2
公开(公告)日：2021-03-02
申请号：US16592353
申请日：2019-10-03
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazushi Torii , Shigeru Sakamoto , Kenji Tada , Kazuki Kimura , Yusuke Watanabe
IPC分类号： B65B1/22 , B01J20/26 , B01J20/28 , G01N1/04 , B65B1/06
摘要： A method for filling a particulate water absorbing agent includes a filling step of filling a particulate water absorbing agent into a filling container and a vibrating step of vibrating the filling container at the outside of the filling container, the vibrating step being conducted at least one time between the start and the end of the filling step, in which a vibration condition in the vibrating step satisfies the following conditions (a) and (b):(a) vibration by a vibrating body in contact with the filling container has a vertical directional component and a vibrational angle is within 90°±30°; and (b) total amplitude at no load and a vibration frequency at no load of the vibrating body are set so as to satisfy Equation 1-1 and Equation 2 or Equation 1-2 and Equation 2.

4. 发明授权

US10695746B2 Water absorbent agent 有权
公开(公告)号：US10695746B2
公开(公告)日：2020-06-30
申请号：US15541845
申请日：2015-12-28
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Reiko Nakatsuru , Kazuki Kimura
IPC分类号： B01J20/26 , A61L15/60 , A61F13/49 , A61F13/53 , B01J20/28 , B01J20/30 , A61L15/24 , G01N5/02
摘要： Provided is a water-absorbing agent which maintains a certain degree of liquid permeability and water absorption speed while also reducing re-wet in a disposable diaper, without the use of costly raw materials or costly apparatuses. The water-absorbing agent of the present invention contains a polyacrylic acid salt-based water-absorbing resin as a main component and has physical properties falling within a specific range, the physical properties being saline flow conductivity (SFC), gap fluid retention property under pressure, and a proportion of particles having a particle diameter of not less than 150 μm and less than 710 μm.

5. 发明授权

US10577135B2 Method for filling particulate water absorbing agent and method for sampling filled particulate water absorbing agent 有权
公开(公告)号：US10577135B2
公开(公告)日：2020-03-03
申请号：US15024733
申请日：2014-09-30
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazushi Torii , Shigeru Sakamoto , Kenji Tada , Kazuki Kimura , Yusuke Watanabe
IPC分类号： B65B1/22 , B01J20/26 , B01J20/28 , G01N1/04 , B65B1/06
摘要： An object of the invention is to provide a technique in which a decrease in physical properties is suppressed or consumer complaints are diminished. A method includes a filling step of filling a particulate water absorbing agent into a filling container and a vibrating step of vibrating the filling container at the outside of the filling container, the vibrating step being conducted at least one time between the start and the end of the filling step. A vibration condition in the vibrating step satisfies the following conditions: (a) vibration by a vibrating body in contact with the filling container has a vertical directional component and a vibrational angle is within 90°±30°; and (b) total amplitude at no load and a vibration frequency at no load of the vibrating body are set so as to satisfy Equation 1-1 and Equation 2 or Equation 1-2 and Equation 2.

6. 发明授权

US10059817B2 Method for producing polyacrylic acid (salt)-based water absorbing agent, and water absorbing agent 有权
公开(公告)号：US10059817B2
公开(公告)日：2018-08-28
申请号：US15297322
申请日：2016-10-19
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazuki Kimura , Yusuke Watanabe , Sayaka Machida , Taku Fujimoto , Kenji Kadonaga
IPC分类号： C08J3/24 , A61L15/24 , A61L15/60 , B01J20/26 , C08F220/06 , C08L33/02
CPC分类号： C08J3/245 , A61L15/24 , A61L15/60 , B01J20/267 , C08F220/06 , C08J2333/02 , C08L33/02 , C08L2203/02 , C08F2222/108
摘要： The present invention relates to an absorbent suitable for use in a thin sanitary material/absorbent article having a high absorbent content and not prone to gel blocking, the absorbent having excellent liquid diffusibility (e.g. SFC) and minimal decrease in absorption ratio under pressure (e.g., AAP or PUP) even when a liquid permeation enhancer is added, and to a method for manufacturing the high-performance absorbent stably during actual production. The method is a method for manufacturing a polyacrylic acid (salt)-based absorbent, having a surface-crosslinking agent addition step for adding a solution of a surface-crosslinking agent, and a liquid permeation enhancer addition step for adding a liquid permeation enhancer, the liquid permeation enhancer addition step being performed after and/or at the same time as the surface-crosslinking agent addition step, the method characterized in that a surface crosslinking step for performing heat treatment in an atmosphere having a dew point of 45° C. to 100° C. is performed after or at the same time as the surface-crosslinking agent addition step.

7. 发明授权

US09518180B2 Method for producing polyacrylic acid (salt)-based water absorbing agent, and water absorbing agent 有权
标题翻译：制备聚丙烯酸（盐）基吸水剂和吸水剂的方法
公开(公告)号：US09518180B2
公开(公告)日：2016-12-13
申请号：US14426539
申请日：2013-08-20
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazuki Kimura , Yusuke Watanabe , Sayaka Machida , Taku Fujimoto , Kenji Kadonaga
IPC分类号： C08L33/02 , B01J20/26 , C08J3/24 , A61L15/60 , C08F220/06
CPC分类号： C08J3/245 , A61L15/24 , A61L15/60 , B01J20/267 , C08F220/06 , C08J2333/02 , C08L33/02 , C08L2203/02 , C08F2222/108
摘要： The present invention relates to an absorbent suitable for use in a thin sanitary material/absorbent article having a high absorbent content and not prone to gel blocking, the absorbent having excellent liquid diffusibility (e.g. SFC) and minimal decrease in absorption ratio under pressure (e.g., AAP or PUP) even when a liquid permeation enhancer is added, and to a method for manufacturing the high-performance absorbent stably during actual production. The method is a method for manufacturing a polyacrylic acid (salt)-based absorbent, having a surface-crosslinking agent addition step for adding a solution of a surface-crosslinking agent, and a liquid permeation enhancer addition step for adding a liquid permeation enhancer, the liquid permeation enhancer addition step being performed after and/or at the same time as the surface-crosslinking agent addition step, the method characterized in that a surface crosslinking step for performing heat treatment in an atmosphere having a dew point of 45° C. to 100° C. is performed after or at the same time as the surface-crosslinking agent addition step.
摘要翻译：本发明涉及适合用于具有高吸收量并且不容易凝胶堵塞的薄卫生材料/吸收制品的吸收剂，该吸收剂具有优异的液体扩散性（例如SFC）和在压力下的最小吸收比例降低（例如，AAP或PUP），以及在实际制造中稳定地制造高性能吸收剂的方法。该方法是制造基于聚丙烯酸（盐）的吸收剂的方法，其具有用于添加表面交联剂溶液的表面交联剂添加步骤和用于添加液体渗透增强剂的液体渗透增强剂添加步骤，所述液体渗透增强剂添加步骤在与所述表面交联剂添加步骤之后和/或同时进行，所述方法的特征在于，在露点为45℃的气氛中进行热处理的表面交联步骤。在表面交联剂添加步骤之后或与表面交联剂添加步骤同时进行。

8. 发明申请

US20150210843A1 METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBING AGENT, AND WATER ABSORBING AGENT 有权
标题翻译：生产聚丙烯酸（盐） - 水吸收剂和吸水剂的方法
公开(公告)号：US20150210843A1
公开(公告)日：2015-07-30
申请号：US14426539
申请日：2013-08-20
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Kazuki Kimura , Yusuke Watanabe , Sayaka Machida , Taku Fujimoto , Kenji Kadonaga
IPC分类号： C08L33/02
CPC分类号： C08J3/245 , A61L15/24 , A61L15/60 , B01J20/267 , C08F220/06 , C08J2333/02 , C08L33/02 , C08L2203/02 , C08F2222/108
摘要： The present invention relates to an absorbent suitable for use in a thin sanitary material/absorbent article having a high absorbent content and not prone to gel blocking, the absorbent having excellent liquid diffusibility (e.g. SFC) and minimal decrease in absorption ratio under pressure (e.g., AAP or PUP) even when a liquid permeation enhancer is added, and to a method for manufacturing the high-performance absorbent stably during actual production. The method is a method for manufacturing a polyacrylic acid (salt)-based absorbent, having a surface-crosslinking agent addition step for adding a solution of a surface-crosslinking agent, and a liquid permeation enhancer addition step for adding a liquid permeation enhancer, the liquid permeation enhancer addition step being performed after and/or at the same time as the surface-crosslinking agent addition step, the method characterized in that a surface crosslinking step for performing heat treatment in an atmosphere having a dew point of 45° C. to 100° C. is performed after or at the same time as the surface-crosslinking agent addition step.
摘要翻译：本发明涉及适合用于具有高吸收量并且不容易凝胶堵塞的薄卫生材料/吸收制品的吸收剂，该吸收剂具有优异的液体扩散性（例如SFC）和在压力下的最小吸收比例降低（例如，AAP或PUP），以及在实际制造中稳定地制造高性能吸收剂的方法。该方法是制造基于聚丙烯酸（盐）的吸收剂的方法，其具有用于添加表面交联剂溶液的表面交联剂添加步骤和用于添加液体渗透增强剂的液体渗透增强剂添加步骤，所述液体渗透增强剂添加步骤在与所述表面交联剂添加步骤之后和/或同时进行，所述方法的特征在于，在露点为45℃的气氛中进行热处理的表面交联步骤。在表面交联剂添加步骤之后或与表面交联剂添加步骤同时进行。

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