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公开(公告)号：US20070141338A1
公开(公告)日：2007-06-21
申请号：US10588530
申请日：2005-03-29
CPC分类号： C08J3/12 , C08J3/245 , C08J2300/14 , Y10T428/249924 , Y10T428/254 , Y10T428/2982 , Y10T428/2991 , Y10T428/2998 , Y10T442/2344
摘要： The present invention provides a particulate water absorbing agent for a thin type absorbing substrate suitable for actual use. A particulate water absorbing agent having irregularly pulverized shape, characterized by comprising, a surface crosslinked water-absorbing resin obtained by crosslinking polymerization of an unsaturated monomer with an acid group and/or salts thereof, which absorbing agent contains agglomerated particles therein and further satisfies (i) centrifuge retention capacity (CRC) in a physiological saline solution of not lower than 32 g/g, (ii) mass median particle size (D50) of 200 to 400 μm, and (iii) particles smaller than 600 μm and not smaller than 150 μm of 95 to 100% by weight. By using the particulate water absorbing agent, such absorbing articles can be obtained as have few rugged surface after water absorption, excellent liquid permeation property.
摘要翻译： 本发明提供一种适用于实际使用的薄型吸收性基材用颗粒状吸水剂。 具有不规则粉碎形状的颗粒状吸水剂，其特征在于，包含通过使不饱和单体与酸基和/或其盐交联聚合得到的表面交联吸水性树脂，所述吸收剂含有附聚颗粒，并进一步满足（ i）在不低于32g / g的生理盐水溶液中离心保留容量（CRC），（ii）质量中值粒径（D50）为200-400μm，和（iii）小于600μm的颗粒而不是更小的颗粒 95％至100％重量的150mg。 通过使用颗粒状吸水剂，可以获得这样的吸收制品，其吸水后的表面几乎不渗透，液体渗透性优异。
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公开(公告)号：US20050228154A1
公开(公告)日：2005-10-13
申请号：US11143628
申请日：2005-06-03
IPC分类号： C08F2/00 , C08F20/06 , C08F220/46
CPC分类号： C08F20/06
摘要： The present invention provides a process for producing a water-absorbent resin of which the residual monomer content and the extractable content are low. The process for producing a water-absorbent resin comprises the step of polymerizing at least one monomer component including acrylic acid and/or its salt as major components to produce a water-absorbent resin that is a neutralized salt, and this process is characterized in that the acrylic acid is a product obtained by catalytic gas phase oxidation of propylene and/or propane and has a protoanemonin content of not more than 10 ppm, and in that the resultant water-absorbent resin has a neutralization ratio of not less than 50 mol %.
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公开(公告)号：US5475062A
公开(公告)日：1995-12-12
申请号：US186560
申请日：1994-01-26
CPC分类号： C08F8/14 , A61L15/20 , A61L15/60 , B01J20/261 , B01J20/265 , B01J20/28004 , B01J20/28014 , B01J20/3021 , B01J20/3078 , B01J20/321 , B01J20/3248 , C08F2810/20
摘要： A method for the surface treatment of an absorbent resin is proposed which notably improves the absorption capacity of the absorbent resin under pressure without impairing safety and hydroscopic flowability. The method comprises adding an organic carboxylic ester of a polyhydric alcohol to the absorbent resin and then heat-treating the resultant mixture.
摘要翻译： 提出了一种用于表面处理吸收性树脂的方法，该方法在不损害安全性和吸湿性的流动性的情况下，显着提高了吸收性树脂在加压下的吸收能力。 该方法包括向吸收树脂中加入多元醇的有机羧酸酯，然后热处理所得的混合物。
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公开(公告)号：US5389722A
公开(公告)日：1995-02-14
申请号：US70765
申请日：1993-06-03
申请人： Kinya Nagasuna , Kunihiko Ishizaki
发明人： Kinya Nagasuna , Kunihiko Ishizaki
IPC分类号： A61L15/60 , C08F220/04 , C08F220/28 , C08F8/00
CPC分类号： C08F220/28 , A61L15/60 , C08F220/04
摘要： A hydrophilic resin is produced by a method which comprises copolymerizing a hydrophilic unsaturated monomer with 0.001 to 50 mol %, based on the amount of said monomer, of a first cross-linking agent possessing a structural unit represented by the general formula (I): ##STR1## wherein n represents an integer of at least 1, and then heat-treating the product of the copolymerization. An absorbent resin is produced by a method which comprises treating the hydrophilic resin obtained as described above, in the surface region of the resin, in the presence of a third cross-linking agent capable of reacting with the functional group of the hydrophilic resin.The absorbent ratio of the absorbent resin with respect to physiological saline solution is able to be increased to at least 20 g/g as compared to its original level by being heat-treated at a temperature of 150.degree. C. for 30 minutes.
摘要翻译： 通过以下方法制备亲水性树脂：使具有由通式（I）表示的结构单元的第一交联剂以基于所述单体的量使亲水性不饱和单体为0.001〜50摩尔％的方法： （I）其中n表示至少为1的整数，然后热处理共聚产物。 通过在与能够与亲水性树脂的官能团反应的第三交联剂的存在下，在树脂的表面区域中处理上述得到的亲水性树脂的方法制造吸水性树脂。 通过在150℃的温度下热处理30分钟，吸收性树脂相对于生理盐水溶液的吸收比可与原来的水平相比提高至至少20g / g。
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公开(公告)号：US10307506B2
公开(公告)日：2019-06-04
申请号：US13634128
申请日：2011-03-14
摘要： The disclosed process for continuously producing a water-absorbing resin comprising a plurality of joined continuous steps; a polymerization step of polymerizing an aqueous unsaturated monomer solution, a drying step of drying a particulated water-containing gel-like crosslinked polymer obtained in a finely crushing step during the polymerization or after the polymerization, a pulverizing step after the drying, a classification step after the drying, and a surface treatment step for the water-absorbing resin powder after the classification step. In the process, with some of the above steps kept running, the other steps are interrupted, and subsequently all the steps are restarted.
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公开(公告)号：US09976001B2
公开(公告)日：2018-05-22
申请号：US13578118
申请日：2011-02-10
申请人： Sumio Okuda , Kunihiko Ishizaki , Katsuyuki Wada
发明人： Sumio Okuda , Kunihiko Ishizaki , Katsuyuki Wada
CPC分类号： C08J3/12 , B01J20/267 , B01J2220/68 , C08J3/245 , C08J2300/14
摘要： Provided is a process for producing a water-absorbing resin powder which contains a given amount of water added thereto, has a low dust content, and has high material properties. When a water-absorbing resin powder which has undergone surface crosslinking is produced on an industrial scale, various problems concerning production are eliminated and a long-term stable operation is possible without causing a deterioration in the material properties of the resin. Even when the process is continued over a long period, the material properties are stabilized (decrease in standard deviation) or improved (improvement in AAP). The process for producing a water-absorbing resin comprises, in the following order, a first classification step for classifying a water-absorbing resin, a surface crosslinking step after the classification, a water addition step for adding water to the water-absorbing resin powder after or during the surface crosslinking, a second classification step, and a conveying step.
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公开(公告)号：US09453091B2
公开(公告)日：2016-09-27
申请号：US13635045
申请日：2011-03-17
申请人： Sumio Okuda , Syuji Kanzaki , Kunihiko Ishizaki , Shinichi Fujino , Kozo Nogi
发明人： Sumio Okuda , Syuji Kanzaki , Kunihiko Ishizaki , Shinichi Fujino , Kozo Nogi
IPC分类号： A61L15/24 , C08F120/06 , C08F220/06 , C08J3/24 , B07B1/56 , C08F6/00 , B07B13/16 , G01N15/02 , B07B1/28
CPC分类号： C08F120/06 , B07B1/28 , B07B1/54 , B07B1/56 , B07B13/16 , C08F6/008 , C08F220/06 , C08J3/24 , C08J3/245 , C08J2300/14 , G01N15/0272 , G01N2015/0277 , G01N2015/0288
摘要： A method for producing a water absorbent resin, the method including a polymerization step, a drying step, a classification step, and a surface crosslinking step. The classification step carried out before or after the surface crosslinking step requires use of a metal sieve mesh having stretch tension from 35 to 100 N/cm, in which an air jet cleaner or an air jet brush cleaner and plural tapping balls or tapping blocks are installed below the metal sieve mesh, a classification aid particle having specific gravity different from that of the water absorbent resin powder is added, and a fine powder of the water absorbent resin and the classification aid particle are removed.
摘要翻译： 一种吸水性树脂的制造方法，其包括聚合工序，干燥工序，分级工序以及表面交联工序。 在表面交联步骤之前或之后进行的分级步骤需要使用具有35至100N / cm的拉伸张力的金属筛网，其中空气喷射清洁器或空气喷射刷清洁器和多个敲击球或攻丝块是 在金属筛网的下方，添加比重与吸水性树脂粉末不同的分级助剂粒子，除去吸水性树脂和分级助剂粒子的细粉末。
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公开(公告)号：US09382390B2
公开(公告)日：2016-07-05
申请号：US11708342
申请日：2007-02-21
CPC分类号： C08J3/005 , C08J3/12 , C08J3/245 , C08J2300/14 , Y10T428/2982
摘要： There is disclosed a process for continuous production of a water-absorbent resin product by which the water-absorbent resin product having high properties can continuously be produced easily and inexpensively with stable constant quality. In addition, there is disclosed a water-absorbent resin product having high properties and being stable in quality. The process comprises the following steps of: (A) measuring a water-absorbent resin by its predetermined property and/or its predetermined component content, wherein the water-absorbent resin comes being continuously produced via a classification step and/or a surface-modifying step; (B) separating a predetermined amount of water-absorbent resin (a) from the water-absorbent resin that comes being continuously produced, wherein the water-absorbent resin (a) is a water-absorbent resin which displays not less than a definite value and/or a water-absorbent resin which displays not more than a definite value as to the predetermined property and/or the predetermined component content in accordance with results of the aforementioned measurement; and (C) mixing at least a portion of the aforementioned separated predetermined amount of water-absorbent resin (a) into a water-absorbent resin that comes being continuously produced via a classification step and/or a surface-modifying step on the same or another production line.
摘要翻译： 公开了一种连续生产吸水性树脂产品的方法，通过该方法可以以稳定的恒定质量容易且廉价地连续制造具有高性能的吸水性树脂产品。 此外，公开了具有高性能并且质量稳定的吸水性树脂产品。 该方法包括以下步骤：（A）通过其预定的性质和/或其预定的组分含量测量吸水性树脂，其中吸水性树脂通过分级步骤和/或表面改性 步; （B）从连续制造的吸水性树脂中分离规定量的吸水性树脂（a），其中吸水性树脂（a）是不低于一定值的吸水性树脂 和/或根据上述测量结果显示关于预定性质和/或预定成分含量的确定值不大于一定值的吸水性树脂; 和（C）将上述分离的预定量的吸水性树脂（a）的至少一部分混合到通过分级步骤和/或表面改性步骤连续生产的吸水性树脂中，或 另一条生产线。
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公开(公告)号：US09233186B2
公开(公告)日：2016-01-12
申请号：US13634151
申请日：2011-03-14
CPC分类号： A61L15/56 , A61L15/60 , B01J20/261 , B01J20/267 , B01J2220/68 , C08F6/008 , C08J3/12 , C08J3/122 , C08J3/245 , C08J2300/14 , C08J2333/02
摘要： The disclosed process for producing a water-absorbing resin comprising: a polymerization step of polymerizing an aqueous unsaturated monomer; a drying step of drying a particulated water-containing gel-liked crosslinked polymer, obtained in a finely crushing step during the polymerization or after the polymerization; a pulverizing step after the drying, a classification step after the drying, and a surface treatment step after the classification. In the process is, the surface-treatment step is interrupted with a heating treatment apparatus kept in a heated state and thereafter the surface treatment step is restarted.
摘要翻译： 所公开的生产吸水性树脂的方法，包括：使含水不饱和单体聚合的聚合步骤; 干燥步骤，在聚合过程中或在聚合后，在细粉碎步骤中得到颗粒状含水凝胶状交联聚合物; 干燥后的粉碎工序，干燥后的分级工序，分级后的表面处理工序。 在该过程中，表面处理步骤被保持在加热状态的加热处理装置中断，然后重新开始表面处理步骤。
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50.发明授权Polyacrylic acid (salt)-type water absorbent resin and method for producing of same 有权聚丙烯酸（盐）型吸水性树脂及其制造方法公开(公告)号：US08907021B2
公开(公告)日：2014-12-09
申请号：US13392639
申请日：2010-08-27
申请人： Takahiro Kitano , Kozo Nogi , Kunihiko Ishizaki
发明人： Takahiro Kitano , Kozo Nogi , Kunihiko Ishizaki
IPC分类号： C08F2/01
CPC分类号： A61L15/24 , A61L15/60 , C08F120/06 , C08F220/06 , C08J3/24 , C08J3/245 , C08J2300/14 , C08J2333/02 , C08L33/08 , C08F2222/1013
摘要： Disclosed is a method for producing a water absorbent resin, by which a surface-crosslinked water absorbent resin having excellent physical properties can be efficiently obtained at low cost, while assuring high productivity. When the production scale is increased to a continuous production at 1 t/hr or more, the physical properties are improved and stabilized (for example, standard deviation of the physical properties is reduced) by a surface-crosslinking treatment, and the absorption against pressure (AAP) and liquid permeability (SFC) are further improved. Specifically disclosed is a method for producing a water absorbent resin, which is characterized in that the stirring shaft of the continuous mixing apparatus for the surface-crosslinking agent is heated during the mixing step of the surface-crosslinking agent or that the continuous mixing apparatus for the surface-crosslinking agent is operated at a pressure that is reduced relative to the ambient pressure and a gas flow is passed through the mixing apparatus during the mixing of the surface-crosslinking agent so that the gas flow in the mixing apparatus is 40° C. or more (when defined with respect to the gas temperature at the exit).
摘要翻译： 公开了一种生产吸水性树脂的方法，通过该方法可以以低成本有效地获得具有优异物理性能的表面交联吸水性树脂，同时确保高生产率。 当生产规模增加到1t / hr以上的连续生产时，通过表面交联处理改善和稳定物理性能（例如物理性能的标准偏差），并且抗压力 （AAP）和液体渗透性（SFC）进一步提高。 具体公开了一种吸水性树脂的制造方法，其特征在于，表面交联剂的连续混合装置的搅拌轴在表面交联剂的混合工序中被加热， 表面交联剂在相对于环境压力降低的压力下操作，并且在混合表面交联剂期间气流通过混合装置，使得混合装置中的气流为40℃ 或更多（当相对于出口处的气体温度定义时）。
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