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公开(公告)号：US20240253012A1
公开(公告)日：2024-08-01
申请号：US18289242
申请日：2022-05-09
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Kanako TSURU , Satoshi MATSUMOTO , Sachie KITABATA
CPC classification number: B01J20/261 , A61L15/24 , A61L15/60 , B01J20/28011 , B01J20/28019 , B01J20/28028 , B01J20/2803 , B01J20/3007 , B01J20/3085 , C08F20/06
Abstract: An object lies in providing a water-absorbing resin capable of absorbing body fluids in a wide viscosity range from a body fluid having a low viscosity to a body fluid having a high viscosity, while maintaining water absorption capacity and water absorption speed. Used is a polyacrylic acid (salt)-based water-absorbing resin having: a free swell rate (A) with respect to an aqueous polyethylene oxide solution of 40° C. of 0.15 g·g−1·s−1 or more; a free swell rate (B) with respect to a physiological saline of 40° C. of 0.40 g·g−1·s−1 or more; and a free swell rate (A)/free swell rate (B) of 0.20 or more.
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公开(公告)号：US20210147637A1
公开(公告)日：2021-05-20
申请号：US17055174
申请日：2019-05-16
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Satoshi MATSUMOTO , Kenji KADONAGA , Kunihiko ISHIZAKI
Abstract: The present invention addresses the problem of reducing the undried residue when recycling a fine powder of water-absorbing resin. The present invention is a method for producing a water-absorbing resin, wherein: a fine powder recycling step includes vi-1) a granulation step for obtaining a granulated gel, vi-2) a granulated gel addition step, and vi-3) a gel mixing step; the solids content of the granulated gel in the granulated gel addition step is 50-90% by mass; and the temperature of the granulated gel and the temperature of the water-containing gel-like crosslinked polymer is 50-100° C.
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3.发明申请公开(公告)号：US20170166670A1
公开(公告)日：2017-06-15
申请号：US15441769
申请日：2017-02-24
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Satoshi MATSUMOTO , Yuki MIURA , Kunihiko ISHIZAKI , Yoshifumi ADACHI
IPC: C08F220/06 , B01J20/30 , B01J20/26
CPC classification number: C08F220/06 , B01J20/261 , B01J20/3085
Abstract: A polyacrylic acid (salt), or a polyacrylic acid (salt)-based water-absorbing resin, contains a tracer for detecting various troubles in the water-absorbing resin during the period from the production of the water-absorbing resin to the use and discard thereof by a consumer. The polyacrylic acid (salt)-based water-absorbing resin has a stable carbon isotope ratio, as determined by accelerator mass spectrometry, of less than −20‰ and a radioactive carbon content of 1.0×10−14 or more. The polyacrylic acid (salt)-based water-absorbing resin has: a CRC of 10 [g/g] or more; an AAP of 20 [g/g] or more; an Ext of 35 wt. % or less; a content of residual monomers of 1,000 ppm or less; a PSD in which the proportion of particles having a particle diameter of 150 μm or larger but less than 850 μm is 90 wt. % or more; and an FSR of 0.15 [g/g/s] or more.
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4.发明申请公开(公告)号：US20170158791A1
公开(公告)日：2017-06-08
申请号：US15440817
申请日：2017-02-23
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Satoshi MATSUMOTO , Yuki MIURA , Kunihiko ISHIZAKI , Shigeru SAKAMOTO
IPC: C08F220/06 , B01J20/30 , B01J20/26
CPC classification number: C08F220/06 , B01J20/261 , B01J20/3085
Abstract: Disclosed are a polyacrylate (salt) and a polyacrylate (salt) water-absorbent resin containing a tracer which can be verified back to the manufacturing process of the water-absorbent resin when dealing with various problems with the water-absorbent resin which can occur from the manufacturing process of the water-resistant resin, during the use thereof by a consumer, up until the disposal thereof. The disclosed polyacrylate (salt) and the polyacrylate (salt) water-absorbent resin have a carbon stable isotope ratio (δ13C) of at least −20‰ when measured by accelerator mass spectrometry.
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公开(公告)号：US20220387971A1
公开(公告)日：2022-12-08
申请号：US17774097
申请日：2020-11-12
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Satoshi MATSUMOTO , Kanako TSURU , Taishi KOBAYASHI , Daisuke TAKAGI , Kazushi TORII
Abstract: [Problem] In an embodiment involving addition of a chelating agent in an upstream process of the process for production, such as the polymerization step, the residual ratio of the chelating agent in the final product, a particulate water-absorbing agent, is improved.
[Solution] A particulate water-absorbing agent having a poly(meth)acrylic acid (salt)-based water-absorbing resin as a main component, containing a chelating agent having a nitrogen atom and an inorganic reducing agent having a sulfur atom, wherein the particulate water-absorbing agent has a chelating agent ratio of 0.8 to 1.8, as calculated by the following procedures (a) to (c): (a) subjecting the particulate water-absorbing agent to a predetermined impact test; (b) sieving the particulate water-absorbing agent subjected to the impact test into a particle group 1 with a particle size of less than 300 μm and a particle group 2 with a particle size of 300 μm or more and less than 850 μm using a JIS standard sieve; and (c) quantifying a content C1 of the chelating agent present in the particle group 1 and a content C2 of the chelating agent present in the particle group 2, and then dividing the C1 by the C2.-
Patent Agency Ranking
6.发明申请公开(公告)号：US20170044281A1
公开(公告)日：2017-02-16
申请号：US15305971
申请日：2015-04-24
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Shinichi FUJINO , Kunihiko ISHIZAKI , Satoshi MATSUMOTO
IPC: C08F120/06 , B01J20/26
CPC classification number: C08F120/06 , B01J20/261 , B01J20/265 , B01J20/267 , B01J20/3014 , C08F2/01 , C08F2/10 , C08F20/06
Abstract: A method for producing polyacrylic acid (salt)-based water-absorbing resin includes a step of polymerizing an acrylic acid (salt)-based aqueous monomer solution, the polymerization step involving use of a polymerization reaction apparatus including a polymerization reaction unit covered with a casing, the polymerization step involving a polymerization reaction under internal pressure of the polymerization reaction unit, the internal pressure being slightly reduced and having a pressure reduction level of more than 0 kPa and not more than 10 kPa relative to the ambient pressure at the periphery of the polymerization reaction unit.
Abstract translation: 制备聚丙烯酸（盐）基吸水性树脂的方法包括使丙烯酸（盐）基单体水溶液聚合的步骤，所述聚合步骤包括使用包含聚合反应单元的聚合反应装置， 所述聚合步骤涉及在所述聚合反应单元的内部压力下的聚合反应，所述内部压力略微降低，并且相对于所述聚合反应单元周围的环境压力具有大于0kPa且不大于10kPa的压力降低水平 聚合反应单元。
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7.发明申请公开(公告)号：US20150322180A1
公开(公告)日：2015-11-12
申请号：US14647311
申请日：2013-11-27
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Satoshi MATSUMOTO , Makoto MATSUMOTO , Seiji KATO , Kazumasa KONISHI , Kenji KADONAGA , Shinichi FUJINO
IPC: C08F22/02
CPC classification number: C08F22/02 , C08J3/245 , C08J2333/02
Abstract: An object of the present invention is to provide a simple method for improving and stabilizing the physical properties (for example, liquid permeability) of a water absorbent resin, without requiring investment in expensive facilities or modification of raw materials. In particular, the object is to provide a method which is useful in the large-scale production of a water absorbent resin. The method for producing polyacrylic acid (salt)-based water absorbent resin of the present invention includes, in order, a step in which an acrylic acid (salt)-based monomer aqueous solution is polymerized, a step in which the water-containing gel-like crosslinked polymer obtained in the polymerization step is dried, a step in which the dried polymer obtained in the drying step is pulverized, and a classification step which takes place after the drying step or after the pulverizing step, wherein, at the time of providing the dried polymer to the roll mill used in the pulverizing step, the dried polymer is provided in a dispersed state in the axial direction of the roll of the roll mill.
Abstract translation: 本发明的目的是提供一种用于改善和稳定吸水性树脂的物理性能（例如透液性）的简单方法，而不需要投资昂贵的设备或改变原料。 特别地，本发明的目的是提供一种在大规模生产吸水性树脂中有用的方法。 本发明的聚丙烯酸（盐）系吸水性树脂的制造方法依次包括丙烯酸（盐）类单体水溶液聚合的工序，其中含水凝胶 在聚合步骤中获得的类似的交联聚合物被干燥，将在干燥步骤中获得的干燥聚合物粉碎的步骤和在干燥步骤之后或粉碎步骤之后发生的分级步骤，其中在 将干燥的聚合物提供给在粉碎步骤中使用的辊磨机中，干燥的聚合物以辊磨机的辊的轴向分散状态提供。
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公开(公告)号：US20250025857A1
公开(公告)日：2025-01-23
申请号：US18714746
申请日：2022-12-01
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Kanako TSURU , Satoshi MATSUMOTO , Sachie KITABATA , Kunihiko ISHIZAKI
Abstract: Provided as an absorbent article capable of, in a state of having a crease, preventing the occurrence of liquid running along the crease is an absorbent article including a liquid-permeable top sheet, an absorbent body containing a water-absorbing resin, the water-absorbing resin being a particulate poly(meth)acrylic acid (salt)-based water-absorbing resin and having the following physical property values (1) to (3), and a liquid-impermeable back sheet in this order, wherein a basis weight of the water-absorbing resin is 300 g/m2 to 1000 g/m2, (1) a vertical liquid diffusion length (D) is 15 mm or more; (2) a ratio (L/D) of a horizontal liquid diffusion length (L) to the vertical liquid diffusion length is 0.5 to 1.5; and (3) a bulk density defined in EDANA ERT 460.2-02 is 0.68 g/mL or more.
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公开(公告)号：US20240253013A1
公开(公告)日：2024-08-01
申请号：US18289690
申请日：2022-04-25
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Sachie KITABATA , Satoshi MATSUMOTO , Kanako TSURU , Kunihiko ISHIZAKI
CPC classification number: B01J20/261 , A61L15/24 , B01J20/28004 , B01J20/28019 , B01J20/2803 , B01J20/28047 , B01J20/3007 , B01J20/3085 , C08F20/06
Abstract: An object lies in providing a novel water-absorbing resin and a novel absorbent body both of which enable provision of an absorbent article that prevents swelling of a water-absorbing portion when used in a thin absorbent article. The object is achieved by providing a water-absorbing resin that is a particulate poly(meth)acrylic acid (salt)-based water-absorbing resin and has a swollen gel compressibility rate of 3% or more expressed by Formula 1: Swollen gel compressibility rate [%]=(D1−D2)/D1×100 (Formula 1), where D1 represents a thickness of a swollen gel before compression, and D2 represents a thickness of a swollen gel after compression.
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公开(公告)号：US20210115198A1
公开(公告)日：2021-04-22
申请号：US17055153
申请日：2019-05-16
Applicant: NIPPON SHOKUBAI CO., LTD.
Inventor： Tsuyoshi YORINO , Naoki KATAKURA , Hiroki HAYASHI , Sumito KUMAGAI , Masahumi INOUE , Tomoyuki ARAKE , Mai SATO , Ryota WAKABAYASHI , Yoshihiro SHOBO , Shin-ya KATSUBE , Yoshifumi ADACHI , Satoshi MATSUMOTO
Abstract: The present invention addresses the problem of providing; a water absorbent resin powder having a reduced amount of fine powder generated and a reduced amount of fine powder recovered; and a production method for the water absorbent resin. The production method of the present invention includes a drying step and a fine powder granulation step. The drying step is for obtaining a dried polymer by drying a particulate water-containing gel crosslinked polymer which is obtained using an acid group-containing unsaturated monomer as a main component. The fine powder granulation step is for obtaining a fine powder granulated product by adding a binder and an adhesion control agent to a fine powder made of a water absorbent resin. In this production method, the obtained fine powder granulated product is recovered in the drying step or in any step before the drying step.
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