公开(公告)号：US06617489B2

公开(公告)日：2003-09-09

申请号：US09846180

申请日：2001-05-02

申请人： Katsuyuki Wada ,  Naoko Takahashi ,  Kunihiko Ishizaki

发明人： Katsuyuki Wada ,  Naoko Takahashi ,  Kunihiko Ishizaki

IPC分类号： A61F1315

CPC分类号： A61L15/60 ,  B01J20/26

摘要： The absorbent in accordance with the present invention is limited in at least two of the following requirements: ventilation resistance, absorbency under no load and/or under load, weight mean particle diameter, and water-soluble components. The absorbent exhibits a 24 g/g or more absorbency under a 2.0 kPa load and a 50 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state. The absorbing product in accordance with the present invention is based on this absorbent and therefore exhibits improved ventilating properties when worn and relatively little wet back of water-based liquids, providing a further improved sense of comfort to users wearing the absorbing product.

公开(公告)号：US6127454A

公开(公告)日：2000-10-03

申请号：US947094

申请日：1997-10-08

申请人： Katsuyuki Wada ,  Kinya Nagasuna

发明人： Katsuyuki Wada ,  Kinya Nagasuna

IPC分类号： A61L15/60 ,  C08F8/00 ,  C08K9/00 ,  C08L83/00 ,  A61L15/00

CPC分类号： A61L15/60 ,  C08F8/00 ,  C08F2800/20 ,  C08F2810/20

摘要： The invention provides a water-absorbing agent, which has high absorption capacity and excellent absorption efficiency under increased pressure and can display excellent water absorption properties when used for sanitary materials even if the resin concentration of a water-absorbent resin is high. The water-absorbing agent has an absorption capacity of 30 (g/g) or more and the below-defined absorption efficiency of 0.7 or more under increased pressure. This agent can be obtained by heating in the presence of a surface-crosslinking agent a water-absorbent resin having an absorption capacity of 40 (g/g) or more and an amount of an eluting component of 1 wt % or less relative to the water-absorbent resin, or by: polymerizing a water-absorbent resin in the presence of a chain transfer agent; treating the polymerized resin with a hydrophilic solution; and heating the treated resin in the presence of a surface-crosslinking agent. ##EQU1##

摘要翻译： 本发明提供一种吸水剂，即使在吸水性树脂的树脂浓度高的情况下，也可以在增加压力的情况下具有高吸收能力和优异的吸收效率，并且在用于卫生材料时可以显示优异的吸水性。 该吸水剂在增加压力下的吸收能力为30（g / g）以上，吸收效率为0.7以下。 可以通过在表面交联剂的存在下加热吸收能力为40（g / g）以上的吸水性树脂和1重量％以下的洗脱成分的量相对于 吸水性树脂，或通过在链转移剂的存在下聚合吸水性树脂; 用亲水溶液处理聚合树脂; 并在表面交联剂的存在下加热经处理的树脂。

公开(公告)号：US6054541A

公开(公告)日：2000-04-25

申请号：US45827

申请日：1998-03-23

申请人： Katsuyuki Wada ,  Kinya Nagasuna ,  Shin-ichi Fujino ,  Yoshihiko Masuda

发明人： Katsuyuki Wada ,  Kinya Nagasuna ,  Shin-ichi Fujino ,  Yoshihiko Masuda

IPC分类号： A61F13/15 ,  A61L15/60 ,  C08F220/00 ,  C08F220/06 ,  C08F8/14

CPC分类号： A61F13/53 ,  A61F13/15203 ,  A61L15/60 ,  C08F220/00 ,  C08F220/06

摘要： An absorbing agent has a diffusing absorbency under pressure of not less than 25 g/g when 60 minutes elapsed after absorption is started, and a water-soluble content is above 0 percent by weight and not more than 7 percent by weight. The absorbing agent is prepared by surface-crosslinking a precursor of the absorbing agent obtained by performing an aqueous solution polymerization of a hydrophilic unsaturated monomer having not less than 50 mole percent neutralized acrylic acid as a main component using a specific crosslinking agent having a main component composed of an ester compound of a specific polyhydroxy alcohol and an unsatuated carboxylic acid, and a high-boiling component having at least two alcohol structures in a molecule as a specific ratio. As a result, an absorbing agent having excellent properties such as the diffusing absorbency under pressure is high, the water soluble content is small, and the amount of wet back of the aqueous liquid after a long period of time is small, water absorbency under pressure can be stably maintained for a long period of time can be achieved.

摘要翻译： 吸收剂在吸收开始60分钟后具有不低于25g / g的压力下的扩散吸收性，并且水溶性成分高于0重量％且不大于7重量％。 吸收剂是通过使用具有主成分的特定交联剂进行以不少于50摩尔％中和的丙烯酸为主成分的亲水性不饱和单体的水溶液聚合而获得的吸收剂的前体进行表面交联而制备的。 由特定的多羟基醇和不饱和羧酸的酯化合物和分子中具有至少两个醇结构的高沸点组分作为特定比例组成。 结果，具有优异性能的吸收剂如压力下的扩散吸收性高，水溶性量小，长时间后的水性液体的湿润量少，压力下的吸水性 可以长期稳定地维持可以实现。

公开(公告)号：US5750582A

公开(公告)日：1998-05-12

申请号：US658251

申请日：1996-06-04

申请人： Nobuyuki Harada ,  Katsuyuki Wada ,  Hisanori Obara ,  Toru Inaoka

发明人： Nobuyuki Harada ,  Katsuyuki Wada ,  Hisanori Obara ,  Toru Inaoka

IPC分类号： B01J20/26 ,  B01J20/28 ,  C08F2/32 ,  C08J9/28

CPC分类号： B01J20/26

摘要： The disclosure is a liquid absorbable material comprising a porous formed article possessed of partitioning walls of a cross-linked polymer and continued micropores, characterized in that said material has a density in the range of 0.2 to 1.0 g/cm.sup.3, and (a) that said partitioning walls exhibit a swelling degree to kerosine in the range of 2 to 10, and that said material has an absorption capacity per unit volume, the capacity being at least 4 cm.sup.3 /cm.sup.3 for water, ethanol, toluene and kerosine, respectively, or (b) that said material has an absorption capacity per unit weight, the capacity being at least 10 g/g for water, ethanol, toluene and kerosine, respectively, the liquids being at a temperature not less than the softening point of the cross-linked polymer. The liquid absorbable material can absorb liquids such as water and petroleum quickly and expand with the absorbed liquid.

公开(公告)号：US09669386B2

公开(公告)日：2017-06-06

申请号：US13876728

申请日：2011-09-30

申请人： Katsuyuki Wada ,  Yasuhisa Nakashima

发明人： Katsuyuki Wada ,  Yasuhisa Nakashima

IPC分类号： B01J20/28 ,  B01J20/22 ,  B01J20/26 ,  B01J20/30 ,  A61L15/60 ,  C08F220/06 ,  C08J3/24 ,  C08J3/20

CPC分类号： B01J20/28011 ,  A61L15/60 ,  B01J20/223 ,  B01J20/267 ,  B01J20/3085 ,  C08F220/06 ,  C08J3/203 ,  C08J3/245 ,  C08J2333/02 ,  C08F2222/1013

摘要： A particulate water-absorbing agent containing a surface-crosslinked polyacrylic acid (salt)-type water-absorbing resin as a main component and at least one spacer selected from a polycation and water-insoluble fine particles. The particulate water-absorbing agent has a free swell capacity (FSC) of 55 to 65 g/g, an absorption against pressure (AAP—4.83 kPa) of 20 to 30 g/g, and a vertical diffusion absorption amount under pressure (VDAUP—4.83 kPa) of 30 to 80 g. Also disclosed is a method for producing a particulate water-absorbing agent, an absorbent core containing the particulate water-absorbing agent, and an absorbing article containing the absorbent core.

公开(公告)号：US20120298915A1

公开(公告)日：2012-11-29

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

IPC分类号： C08L33/02

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.

摘要翻译： 提供了含有给定量的水的吸水性树脂粉末的制造方法，其具有低的粉尘含量，并且具有高的材料性能。 当以工业规模生产经历表面交联的吸水树脂粉末时，消除了生产中的各种问题，并且可以长期稳定地操作，而不会导致树脂的材料性能的劣化。 即使长时间持续该过程，材料性能也稳定（标准偏差降低）或改善（AAP改善）。 吸水性树脂的制造方法按照以下顺序包括分级吸水性树脂的第一分级工序，分级后的表面交联工序，向吸水性树脂粉末中添加水的添加水添加工序 在表面交联之后或期间，第二分级步骤和输送步骤。

公开(公告)号：US20120172536A1

公开(公告)日：2012-07-05

申请号：US13392256

申请日：2010-08-27

申请人： Kozo Nogi ,  Kunihiko Ishizaki ,  Katsuyuki Wada

发明人： Kozo Nogi ,  Kunihiko Ishizaki ,  Katsuyuki Wada

IPC分类号： C08F120/06

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 on a huge scale (for example, 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 continuously producing a polyacrylic acid (salt)-type water absorbent resin powder, which comprises: a step of preparing an aqueous monomer solution using an acrylic acid (salt); a step of polymerizing the aqueous monomer solution; a shredding step of a hydrous gel-like crosslinked polymer during or after the polymerization; a step of drying the thus-obtained particulate hydrous gel-like crosslinked polymer; a step of crushing and classifying the dried product; a step of heating and surface-crosslinking after the classification; and a step of cooling after the surface-crosslinking. In the method for producing a polyacrylic acid (salt)-type water absorbent resin, the internal area of the cooling device that is used in the cooling step is 0.25-0.95 times the internal area of the heating device that is used in the surface-crosslinking step.

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。 当生产规模以大规模（例如1吨/小时以上）增加到连续生产时，通过表面活性剂改善和稳定物理性能（例如物理性能的标准偏差） 交联处理，耐压吸收（AAP）和液体渗透性（SFC）进一步提高。 具体公开了一种连续生产聚丙烯酸（盐）型吸水性树脂粉末的方法，其包括：使用丙烯酸（盐）制备单体水溶液的步骤; 聚合单体水溶液的步骤; 在聚合期间或之后的含水凝胶状交联聚合物的粉碎步骤; 干燥由此得到的颗粒含水凝胶状交联聚合物的步骤; 破碎和分级干燥产品的步骤; 分类后加热和表面交联的步骤; 和表面交联后的冷却步骤。 在聚丙烯酸（盐）型吸水性树脂的制造方法中，冷却工序中使用的冷却装置的内部面积为表面活性剂中使用的加热装置的内部面积的0.25〜0.95倍， 交联步骤。

公开(公告)号：US07595428B2

公开(公告)日：2009-09-29

申请号：US10148436

申请日：2001-11-21

申请人： Hiroko Ueda ,  Katsuyuki Wada ,  Yoshio Irie

发明人： Hiroko Ueda ,  Katsuyuki Wada ,  Yoshio Irie

IPC分类号： A61F13/15

CPC分类号： A61L15/40 ,  A61L15/46 ,  A61L15/60 ,  A61L2300/30

摘要： The present invention has an object to provide a particulate water-absorbing composition, a production process therefor, and an absorbent article comprising this particulate water-absorbing composition, wherein the particulate water-absorbing composition causes little coloring of other materials and further is of high safety, and can provide excellent deodorizability and excellent absorption properties to absorbent articles such as diapers in the case where combined into the absorbent articles. As a means of achieving this object, a particulate water-absorbing composition according to the present invention is characterized by comprising a plant powder and a water-absorbent resin, wherein a surface portion and/or its vicinity of the water-absorbent resin is surface-treated with a crosslinking agent, and wherein the particulate water-absorbing composition exhibits an offensive-odor removal index of not less than 180 wherein the offensive-odor removal index is represented by the following equation: offensive-odor removal index=1.1×hydrogen sulfide removal ratio+2.0×methylmercaptan removal ratio+0.3×ammonia removal ratio.

摘要翻译： 本发明的目的是提供一种颗粒状吸水性组合物及其制造方法以及包含该颗粒状吸水性组合物的吸收性物品，其中，所述颗粒状吸水性组合物几乎不引起其他材料的着色，并且还高 并且在组合成吸收性物品的情况下，可以对尿布等吸收性物品提供优异的除臭性和优异的吸收性。 作为实现该目的的手段，本发明的颗粒状吸水性组合物的特征在于，含有植物粉末和吸水性树脂，其中吸水性树脂的表面部分和/或其附近为表面 用交联剂处理，其中颗粒状吸水组合物表现出不低于180的恶臭除臭指数，其中恶臭除臭指数由下列等式表示：恶臭除臭指数= 1.1硫化氢 去除率+ 2.0×甲硫醇去除率+0.3×去除率。

公开(公告)号：US20090036855A1

公开(公告)日：2009-02-05

申请号：US11658879

申请日：2005-08-05

申请人： Katsuyuki Wada ,  Hiroko Ueda ,  Teruyuki Kanto ,  Kunihiko Ishizaki ,  Motohiro Imura

发明人： Katsuyuki Wada ,  Hiroko Ueda ,  Teruyuki Kanto ,  Kunihiko Ishizaki ,  Motohiro Imura

IPC分类号： A61F13/53 ,  B01J20/28

CPC分类号： B01J20/261 ,  A61F13/531 ,  A61F2013/530569 ,  A61F2013/5307 ,  A61F2013/530751 ,  A61L15/60 ,  B01J20/26 ,  B01J20/2803 ,  B01J2220/68 ,  C08F6/18 ,  C08F220/06

摘要： Reversed phase suspension polymerization is allowed while controlling content of minor components in monomer, particularly controlling a content of acetic acid and propionic acid being not higher than 500 ppm, controlling a content of acrylic acid dimer being not higher than 1000 ppm, in acrylic acid. Cross-linked polymer obtained by the polymerization is subjected to a surface crosslinking treatment without substantially using an organic solvent, and under heating at high temperature (150° C. or higher and 250° C. or lower). Thereafter, agglomeration is carried out without substantially using an organic solvent. Accordingly, a particulate water-absorbing agent including a water-absorbing resin having superior property, and being suited for practical applications at high concentrations in absorbing cores such as a diaper and the like without generation of any odor of the organic solvent can be obtained because no volatile organic compound is included.

摘要翻译： 在丙烯酸​​中控制丙烯酸二聚体的含量控制丙烯酸二聚体的含量不高于500ppm，特别是控制乙酸和丙酸的含量不高于500ppm，同时控制单体中少量成分的含量，进行反相悬浮聚合。 通过聚合得到的交联聚合物基本上不使用有机溶剂进行表面交联处理，并在高温（150℃以上且250℃以下）下加热。 此后，基本上不使用有机溶剂进行附聚。 因此，可以获得包含具有优异性能的吸水性树脂的颗粒状吸水剂，并且可以获得不产生有机溶剂的任何气味的高吸收性芯材如尿布等的实际应用的颗粒状吸水剂，因为 不含挥发性有机化合物。

公开(公告)号：US06586549B1

公开(公告)日：2003-07-01

申请号：US09610967

申请日：2000-07-06

申请人： Takumi Hatsuda ,  Kazuki Kimura ,  Koji Miyake ,  Eri Goto ,  Katsuyuki Wada

发明人： Takumi Hatsuda ,  Kazuki Kimura ,  Koji Miyake ,  Eri Goto ,  Katsuyuki Wada

IPC分类号： C08J22046

CPC分类号： C08J3/245 ,  A61L15/60 ,  C08J3/12 ,  C08J2300/14 ,  C08L33/02 ,  C08L63/00 ,  C08L2666/14

摘要： The present invention provides: a water-absorbing composition such that portions containing the water-absorbing composition in a high concentration exhibit excessive-liquid permeation buffering effects in absorbent articles comprising the water-absorbing composition and hydrophilic fibers; and a use of this water-absorbing composition. The water-absorbing composition comprises a water-absorbent resin and an excessive-liquid permeation buffer, wherein the water-absorbent resin is a product by a process including the step of further crosslinking the surface vicinity of a crosslinked polymer, and this water-absorbing composition is characterized by having a liquid permeation buffering index of not less than 0.4 and exhibiting an absorption capacity of not less than 25 g/g in absorbent structures under load, and further having an average particle diameter in the range of 200˜600 &mgr;m, wherein the ratio of particles having particle diameters smaller than 106 &mgr;m in the water-absorbing composition is not more than 5 weight %. This water-absorbing composition is, for example, used for the absorbent articles comprising the water-absorbing composition and the hydrophilic fibers.

摘要翻译： 本发明提供一种吸水性组合物，使得含有高浓度吸水性组合物的部分在含有吸水性组合物和亲水性纤维的吸收性物品中表现出过度的液体渗透缓冲效果; 以及这种吸水组合物的用途。 吸水性组合物包含吸水性树脂和过量液体渗透缓冲液，其中吸水性树脂是通过包括进一步交联交联聚合物表面附近的步骤的方法的产物，并且该吸水性树脂 其组成的特征在于在负载下的吸收结构体中的液体渗透缓冲指数为0.4以上，吸收能力为25g / g以上，平均粒径在200〜600μm的范围内， 其中，吸水性组合物中粒径小于106μm的粒子的比例为5重量％以下。 该吸水性组合物例如用于包含吸水性组合物和亲水性纤维的吸收性物品。