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1. 发明公开

EP4159307A1 METHOD FOR FILLING PARTICULATE WATER ABSORBING AGENT AND METHOD FOR SAMPLING FILLED PARTICULATE WATER ABSORBING AGENT 审中-公开
公开(公告)号：EP4159307A1
公开(公告)日：2023-04-05
申请号：EP22209845.1
申请日：2014-09-30
申请人： Nippon Shokubai Co., Ltd.
发明人： Torii, Kazushi , Sakamoto, Shigeru , Tada, Kenji , Kimura, Kazuki , Watanabe, Yusuke
IPC分类号： B01J20/26 , B01J20/28 , B65B1/22 , B65B1/06 , G01N1/04
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 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.

2. 发明授权

EP3520978B1 POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER 有权
公开(公告)号：EP3520978B1
公开(公告)日：2020-11-04
申请号：EP19165778.2
申请日：2014-08-28
申请人： Nippon Shokubai Co., Ltd.
发明人： Torii, Kazushi , Omori, Kohei , Tanaka, Nobuya , Sakamoto, Shigeru , Tada, Kenji , Sato, Hironori
IPC分类号： B29B9/06 , B29B9/12 , C08J3/075 , C08J3/12 , C08F2/10 , C08F6/00 , C08F220/06 , B01J20/26 , B29B7/42 , B29B9/16 , B29C48/68

3. 发明公开

EP2260876A3 Water absorbent product and method for producing the same 有权
标题翻译： Wasserabsorbens und Herstellungsverfahrendafür
公开(公告)号：EP2260876A3
公开(公告)日：2011-04-13
申请号：EP10183241.8
申请日：2004-09-17
申请人： Nippon Shokubai Co., Ltd.
发明人： Torii, Kazushi , Shibata, Hirofumi , Iwamura, Taku , Irie, Yoshio , Dairoku, Yorimichi , Mitsukami, Yoshiro , Machida, Sayaka
IPC分类号： A61L15/60 , C08F20/06 , B01J20/26 , C08J3/24
CPC分类号： C08J3/245 , A61L15/60 , B01J20/261 , B01J2220/68 , C08F20/06 , C08J2333/00
摘要： An object of the present invention is to provide a water absorbent having excellent gel properties and showing excellent properties when used in a water-absorbing material of a sanitary/hygienic material such as paper diaper. Moreover, another object of the present invention is to provide a water absorbent which is safe and excellent in liquid permeability, and in which an amount of liquid permeability improver for improving the liquid permeability is reduced. The water absorbent is made from a water-absorbing resin prepared by a specific polymerization method and having a high degree of cross-linking, a high liquid holding property and a high gel strength (its swelling pressure of gel layer of is 35 kdyne/cm 2 or more). This water absorbent is further processed to have a particular particle size distribution (95wt% or more of its particles are less than 850µm but not less than 106µm, and logarithmic standard deviation (σζ) is in a range of 0.25 to 0.45) and then surface cross-linked. After that, a liquid permeability improver is added therein.
摘要翻译：本发明的目的是提供一种具有优异凝胶性能的吸水剂，并且当用于诸如纸尿布的卫生/卫生材料的吸水材料中时表现出优异的性能。此外，本发明的另一个目的是提供一种安全且透液性优异的吸水剂，其中用于提高液体渗透性的液体渗透性改进剂的量减少。吸水剂由通过特定聚合方法制备的具有高交联度，高液体保持性和高凝胶强度（其凝胶层的溶胀压力为35kDyne / cm）的吸水性树脂制成 2以上）。该吸水剂被进一步处理以具有特定的粒度分布（其颗粒的95重量％或更多小于850μm但不小于106μm，对数标准偏差（¶）在0.25至0.45的范围内）然后表面交联。之后，加入液体渗透性改进剂。

4. 发明授权

EP1616581B1 Water absorbent resin composition and production method thereof 有权
标题翻译：吸水性树脂组合物及其制造方法相同的
公开(公告)号：EP1616581B1
公开(公告)日：2009-12-23
申请号：EP05013153.1
申请日：2005-06-17
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Torii, Kazushi , Nakamura, Masatoshi , Okochi, Hiroko
IPC分类号： A61L15/00
CPC分类号： C08G71/02 , C08J3/245 , C08J2333/02 , C08L33/02 , C08L75/02

5. 发明公开

EP1516884A3 Water-absorbent resin having treated surface and process for producing the same 有权
标题翻译：与经处理的表面和处理其制备吸水性树脂
公开(公告)号：EP1516884A3
公开(公告)日：2006-07-05
申请号：EP04021552.7
申请日：2004-09-10
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Torii, Kazushi , Iwamura, Taku , Ikeuchi, Hiroyuki , Machida, Sayaka
IPC分类号： C08F20/06 , C08F2/10 , A61L15/60
CPC分类号： A61L15/60 , C08F8/42 , C08F2810/20 , C08J3/245 , C08J2300/14 , C08F220/06
摘要： An object of the present invention is to provide: a water-absorbent resin which can sufficiently overcome the problem of the gel blocking, can manifest sufficient absorption capacity without load and sufficient absorption capacity under load and, at the same time, can also exert excellent liquid permeability under load; and a process for producing the same. As a means of achieving this object, a first production process among the processes according to the present invention for producing a water-absorbent resin having a treated surface is a process comprising: a step of mixing a water-absorbent resin having an internal crosslinked structure obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, a complex containing a polyvalent metal atom as a central atom and an organic secondary crosslinking agent in the presence of an aqueous liquid; and a step of crosslinking a surface of the water-absorbent resin with the organic secondary crosslinking agent. And a second production process is a process comprising a step of mixing a water-absorbent resin having an internal crosslinked structure and a crosslinked surface obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, and a complex containing a polyvalent metal atom as a central atom in the presence of an aqueous liquid.
摘要翻译：本发明的目的是提供：一种吸水树脂能够充分克服凝胶阻塞的麻烦，可以表现足够的吸收容量，而无需在负载下和负载足够的吸收能力，并且在在Sametime，因此可以发挥优异的负载下的液体渗透性; 而生产同样的过程。作为实现该目的，雅鼎在本发明的方法用于制备具有经处理的表面的吸水性树脂中的第一种生产方法的一个手段是一种方法，其包括：具有内部交联结构的吸水性树脂混合的步骤通过单体含有丙烯酸和/或作为主要成分，一个复杂的含有多价金属原子作为中心原子，并在在wässrige液体存在有机二次交联剂及其盐聚合而得到; 和交联吸水性树脂的表面与有机二次交联剂的步骤。和第二制造工序是包含具有在内部交联结构和吸水性树脂通过聚合单体含有丙烯酸和/或作为主要成分的化合物或其盐而获得的交联表面混合的步骤的方法，和一个复杂的含多价金属原子作为在含水液体存在一个中心原子。

6. 发明公开

EP1113037A3 Production processes for basic water-absorbing agent 有权
标题翻译：一种生产碱性吸水剂的方法
公开(公告)号：EP1113037A3
公开(公告)日：2001-10-24
申请号：EP00127837.3
申请日：2000-12-19
申请人： Nippon Shokubai Co., Ltd.
发明人： Harada, Nobuyuki , Sakamoto, Shigeru , Adachi, Yoshifumi , Hitomi, Kazuhisa , Torii, Kazushi , Kitayama, Toshimasa
IPC分类号： C08J3/12 , C08J3/24
CPC分类号： C08J3/245 , C08J3/12 , C08J3/122 , C08J2300/14 , Y10T428/2982
摘要： The present invention provides: a production process for a basic water-absorbent resin to be a main component of a water-absorbing agent which exhibits an excellent water absorption capacity under a load with high productivity; a production process for a water-absorbing agent; and use thereof. The production process for an irregular shape basic water-absorbent resin comprises the step of reacting a basic resin and a crosslinking agent in order to obtain the basic water-absorbent resin, with the process forwarding a crosslinking reaction and pulverizing the resultant product at the same time. The first production process for a water-absorbing agent comprises the step of blending an acidic water-absorbent resin with the basic water-absorbent resin obtained by the above-mentioned process. The second production process for a water-absorbing agent comprises the step of obtaining a mixture of an acidic water-absorbent resin and the basic water-absorbent resin by coexisting with the acidic water-absorbent resin when carrying out the crosslinking reaction and the pulverization in the above-mentioned process.

7. 发明公开

EP4252728A2 WATER ABSORBING AGENT BASED ON POLYACRYLIC ACID AND/OR A SALT THEREOF 审中-实审
公开(公告)号：EP4252728A2
公开(公告)日：2023-10-04
申请号：EP23193439.9
申请日：2014-12-19
申请人： Nippon Shokubai Co., Ltd.
发明人： Omori, Kohei , Torii, Kazushi , Tanaka, Nobuya , Watanabe, Yusuke
IPC分类号： A61F13/53
摘要： Provided is method for producing a polyacrylic acid (salt)-based water-absorbing agent. The method comprises heat treating a mixture containing water, a surface crosslinking agent and a water-absorbing resin powder, wherein the water-absorbing resin powder is heat treated for at least five minutes from a start of raising a temperature with a gas density of a specific surface crosslinking agent C2 compound and/or a specific surface crosslinking agent C3 compound being at least 0.01 g/L. The gas density is a weight of the surface crosslinking agent C2 compound or the surface crosslinking agent C3 compound that is contained per unit volume of a non-condensable gas. The method makes it possible to (i) uniformly form a strong crosslinked layer on a surface of a water-absorbing resin powder and (ii) obtain a water-absorbing agent which simultaneously achieves a high water absorbing speed, a high fluid retention capacity under load, high liquid permeability, and salt tolerance. Further, the polyacrylic acid (salt)-based water-absorbing agent produced by the method causes no reduction in fluid retention capacity and bulk specific gravity, and is preferably used in sanitary products such as disposable diapers, sanitary napkins, and incontinence pads.

8. 发明公开

EP1516884A2 Water-absorbent resin having treated surface and process for producing the same 有权
标题翻译：与经处理的表面和处理其制备吸水性树脂
公开(公告)号：EP1516884A2
公开(公告)日：2005-03-23
申请号：EP04021552.7
申请日：2004-09-10
申请人： Nippon Shokubai Co., Ltd.
发明人： Torii, Kazushi , Iwamura, Taku , Ikeuchi, Hiroyuki , Machida, Sayaka
IPC分类号： C08F20/06 , C08F2/10 , A61L15/60
CPC分类号： A61L15/60 , C08F8/42 , C08F2810/20 , C08J3/245 , C08J2300/14 , C08F220/06
摘要： An object of the present invention is to provide: a water-absorbent resin which can sufficiently overcome the problem of the gel blocking, can manifest sufficient absorption capacity without load and sufficient absorption capacity under load and, at the same time, can also exert excellent liquid permeability under load; and a process for producing the same. As a means of achieving this object, a first production process among the processes according to the present invention for producing a water-absorbent resin having a treated surface is a process comprising: a step of mixing a water-absorbent resin having an internal crosslinked structure obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, a complex containing a polyvalent metal atom as a central atom and an organic secondary crosslinking agent in the presence of an aqueous liquid; and a step of crosslinking a surface of the water-absorbent resin with the organic secondary crosslinking agent. And a second production process is a process comprising a step of mixing a water-absorbent resin having an internal crosslinked structure and a crosslinked surface obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, and a complex containing a polyvalent metal atom as a central atom in the presence of an aqueous liquid.

9. 发明公开

EP4252728A3 WATER ABSORBING AGENT BASED ON POLYACRYLIC ACID AND/OR A SALT THEREOF 审中-实审
公开(公告)号：EP4252728A3
公开(公告)日：2024-01-10
申请号：EP23193439.9
申请日：2014-12-19
申请人： Nippon Shokubai Co., Ltd.
发明人： Omori, Kohei , Torii, Kazushi , Tanaka, Nobuya , Watanabe, Yusuke
IPC分类号： B01J20/18 , B01J20/26 , B01J20/30 , C08F8/00 , C08J3/24 , A61F13/49 , A61F13/53
摘要： Provided is method for producing a polyacrylic acid (salt)-based water-absorbing agent. The method comprises heat treating a mixture containing water, a surface crosslinking agent and a water-absorbing resin powder, wherein the water-absorbing resin powder is heat treated for at least five minutes from a start of raising a temperature with a gas density of a specific surface crosslinking agent C2 compound and/or a specific surface crosslinking agent C3 compound being at least 0.01 g/L. The gas density is a weight of the surface crosslinking agent C2 compound or the surface crosslinking agent C3 compound that is contained per unit volume of a non-condensable gas. The method makes it possible to (i) uniformly form a strong crosslinked layer on a surface of a water-absorbing resin powder and (ii) obtain a water-absorbing agent which simultaneously achieves a high water absorbing speed, a high fluid retention capacity under load, high liquid permeability, and salt tolerance. Further, the polyacrylic acid (salt)-based water-absorbing agent produced by the method causes no reduction in fluid retention capacity and bulk specific gravity, and is preferably used in sanitary products such as disposable diapers, sanitary napkins, and incontinence pads.

10. 发明公开

EP2260876A2 Water absorbent product and method for producing the same 有权
标题翻译：其吸水性和制造方法
公开(公告)号：EP2260876A2
公开(公告)日：2010-12-15
申请号：EP10183241.8
申请日：2004-09-17
申请人： Nippon Shokubai Co., Ltd.
发明人： Torii, Kazushi , Shibata, Hirofumi , Iwamura, Taku , Irie, Yoshio , Dairoku, Yorimichi , Mitsukami, Yoshiro , Machida, Sayaka
IPC分类号： A61L15/60 , C08F20/06 , B01J20/26 , C08J3/24
CPC分类号： C08J3/245 , A61L15/60 , B01J20/261 , B01J2220/68 , C08F20/06 , C08J2333/00
摘要： An object of the present invention is to provide a water absorbent having excellent gel properties and showing excellent properties when used in a water-absorbing material of a sanitary/hygienic material such as paper diaper. Moreover, another object of the present invention is to provide a water absorbent which is safe and excellent in liquid permeability, and in which an amount of liquid permeability improver for improving the liquid permeability is reduced. The water absorbent is made from a water-absorbing resin prepared by a specific polymerization method and having a high degree of cross-linking, a high liquid holding property and a high gel strength (its swelling pressure of gel layer of is 35 kdyne/cm 2 or more). This water absorbent is further processed to have a particular particle size distribution (95wt% or more of its particles are less than 850µm but not less than 106µm, and logarithmic standard deviation (σζ) is in a range of 0.25 to 0.45) and then surface cross-linked. After that, a liquid permeability improver is added therein.

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