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1. 发明申请

US20160083533A1 METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER-ABSORBENT RESIN 审中-公开
标题翻译：生产聚丙烯酸（盐） - 水吸收树脂的方法
公开(公告)号：US20160083533A1
公开(公告)日：2016-03-24
申请号：US14888964
申请日：2014-05-09
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Motohiro IMURA , Hidenori WADA , Seiji KATO
IPC分类号： C08J3/24
摘要： A method is disclosed for inexpensively and stably producing, with high productivity, water absorbent resin having excellent damage resistance. A method for producing a polyacrylic acid (salt)-based water absorbent resin, the method comprising a surface-crosslinking step, the surface-crosslinking step including a reaction step, the reaction step involving using a reactor having (i) an inner wall surface having a temperature within a range of 100° C. to 250° C. and (ii) an inside atmosphere having a dew point within a range of 60° C. to 100° C., the reaction step including heat-treating a water absorbent resin mixture so as to produce water absorbent resin powder having a temperature within a range of 90° C. to 130° C.
摘要翻译：公开了低成本且稳定地生产具有优异的耐损伤性的吸水性树脂的方法。一种生产聚丙烯酸（盐）基吸水树脂的方法，所述方法包括表面交联步骤，所述表面交联步骤包括反应步骤，所述反应步骤涉及使用反应器，所述反应器具有（i）内壁表面具有温度在100℃至250℃的范围内的温度和（ii）露点在60℃至100℃范围内的内部气氛，所述反应步骤包括热处理水吸收性树脂混合物，以制备温度在90℃至130℃范围内的吸水性树脂粉末。

2. 发明申请

US20150307667A1 POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN, AND METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN 审中-公开
标题翻译：聚氨酯酸（盐） - 水吸收树脂，以及生产聚丙烯酸（盐） - 水吸收树脂的方法
公开(公告)号：US20150307667A1
公开(公告)日：2015-10-29
申请号：US14648430
申请日：2013-12-03
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Hidenori WADA , Motohiro IMURA , Katsuyuki WADA , Seiji KATO
IPC分类号： C08J3/24 , A61L15/42 , A61L15/60 , A61L15/24
摘要： As a method for producing a polyacrylic acid (salt)-based water absorbent resin particle which less generates fine powder and has an excellent impact resistance and a high moisture content even in a case where the polyacrylic acid (salt)-based water absorbent resin particle is produced on a large scale, employed is a production method including the steps of: (a) adding a surface crosslinking agent solution to water absorbent resin powder to obtain a mixture; (b) reacting the mixture; and, thereafter (c) adding an aqueous liquid to at least one selected from the group consisting of (i) the water absorbent resin powder during the step (b) and (ii) the water absorbent resin powder after the step (b), an atmospheric dew point being not lower than 20° C. in the step (c), and a temperature of the water absorbent resin powder being higher than the atmospheric dew point in the step (c).
摘要翻译：作为制造聚丙烯酸（盐）系吸水性树脂粒子的方法，其即使在聚丙烯酸（盐）系吸水性树脂粒子的情况下也较少产生细粉而具有优异的耐冲击性和高水分含量是一种生产方法，包括以下步骤：（a）将表面交联剂溶液加入到吸水性树脂粉末中以获得混合物; （b）使混合物反应; （c）向（i）步骤（b）中的吸水性树脂粉末和（ii）步骤（b）之后的吸水性树脂粉末中的至少一种中加入水性液体，步骤（c）中的大气露点不低于20℃，并且步骤（c）中吸水性树脂粉末的温度高于大气露点。

3. 发明申请

US20140107293A1 Method for producing water absorbent resin 审中-公开
公开(公告)号：US20140107293A1
公开(公告)日：2014-04-17
申请号：US14136339
申请日：2013-12-20
申请人： Nippon Shokubai Co., Ltd.
发明人： Kenji KADONAGA , Kenji TADA , Masazumi SASABE , Seiji KATO
IPC分类号： C08J3/24
CPC分类号： C08J3/245 , B01F7/00466 , B01F7/169 , C08F20/06 , C08F220/06 , C08J2333/02
摘要： The present invention is a method for producing a water absorbent resin which method is a method for producing surface cross-linked water absorbent resin particles, the method including the successive steps of: (a) adding a surface cross-linking agent and water to a particulate water absorbent resin in a mixer; and (b) reacting the resulting water absorbent resin mixture taken out from the mixer with the surface cross-linking agent in a reactor by heating or active energy ray irradiation, water vapor being used as part or all of the water added in the mixer. This makes it possible to provide a method for producing a water absorbent resin in which method a surface cross-linked water absorbent resin that has excellent properties can be obtained efficiently at low cost with high productivity.

4. 发明申请

US20200317872A1 METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN 审中-公开
公开(公告)号：US20200317872A1
公开(公告)日：2020-10-08
申请号：US16904428
申请日：2020-06-17
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Hidenori WADA , Motohiro IMURA , Katsuyuki WADA , Seiji KATO
IPC分类号： C08J3/24 , C08J3/075 , A61L15/24 , A61L15/42 , A61L15/60
摘要： As a method for producing a polyacrylic acid (salt)-based water absorbent resin particle which less generates fine powder and has an excellent impact resistance and a high moisture content even in a case where the polyacrylic acid (salt)-based water absorbent resin particle is produced on a large scale, employed is a production method including the steps of: (a) adding a surface crosslinking agent solution to water absorbent resin powder to obtain a mixture; (b) reacting the mixture; and, thereafter (c) adding an aqueous liquid to at least one selected from the group consisting of (i) the water absorbent resin powder during the step (b) and (ii) the water absorbent resin powder after the step (b), an atmospheric dew point being not lower than 20° C. in the step (c), and a temperature of the water absorbent resin powder being higher than the atmospheric dew point in the step (c).

5. 发明申请

US20150322180A1 METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN 有权
标题翻译：生产聚丙烯酸（盐） - 水吸收树脂的方法
公开(公告)号：US20150322180A1
公开(公告)日：2015-11-12
申请号：US14647311
申请日：2013-11-27
申请人： NIPPON SHOKUBAI CO., LTD.
发明人： Satoshi MATSUMOTO , Makoto MATSUMOTO , Seiji KATO , Kazumasa KONISHI , Kenji KADONAGA , Shinichi FUJINO
IPC分类号： C08F22/02
CPC分类号： C08F22/02 , C08J3/245 , C08J2333/02
摘要： 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.
摘要翻译：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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