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    Production process for water-absorbent resin
    31.
    发明授权
    Production process for water-absorbent resin 失效
    吸水树脂的生产工艺

    公开(公告)号：US4973632A

    公开(公告)日：1990-11-27

    申请号：US371174

    申请日：1989-06-26

    申请人： Kinya Nagasuna ,  Takashi Namba ,  Koji Miyake ,  Kazumasa Kimura ,  Tadao Shimomura

    发明人： Kinya Nagasuna ,  Takashi Namba ,  Koji Miyake ,  Kazumasa Kimura ,  Tadao Shimomura

    IPC分类号： C08F220/06 ,  A61L15/24 ,  C08F2/08 ,  C08F2/32

    CPC分类号： C08F2/32

    摘要： This invention relates to a water-absorbent resin of a new, novel type obtained from polymerization of water-soluble ethylenically unsaturated monomer and a process for producing this resin.The water-absorbent resin in this invention has average particle diameter in a specially defined range and a narrow range of particle distribution, being superior in water-absorption capacity, and also, being superior in handling properties in a point of that, when being mixed with liquid, formation of a fish-eye is absent. The water-absorbent resin shows an angle-lacking, non-sphere shape and, in a case of shape like this, is superior in handling properties in a point that being hard in falling off from an basis material.Although the production process is performed to get a water-absorbent resin by carrying out polymerization in a reverse-phase suspension polymerization method, since the aqueous monomer solution is chosen from a specially defined viscosity range and dispersed and suspended by using a specially defined dispersing agent, a water-absorbent resin is easily obtainable wherein, not only the average particle diameter is controlled by adjusting the viscosity of an aqueous monomer solution, but also the particle diameter distribution is narrow. The water-absorbent resin obtained shows that a water-soluble component is small, so that it is very good for sanitary reasons. In this method, it is possible to vary the particle shape by changing up and down the viscosity of an aqueous monomer solution in an above-described specially defined range.The water-absorbent resin in this invention, because of having the above-described properties, is preferably used for sanitary materials and the like.

    Absorbent structure, absorbent article, water-absorbent resin, and its production process and evaluation method
    32.
    发明授权
    Absorbent structure, absorbent article, water-absorbent resin, and its production process and evaluation method 有权
    吸水结构，吸收性物品，吸水性树脂及其生产工艺及评价方法

    公开(公告)号：US08426670B2

    公开(公告)日：2013-04-23

    申请号：US10416457

    申请日：2002-09-18

    申请人： Kinya Nagasuna ,  Kenji Kadonaga ,  Akiko Mitsuhashi ,  Motohiro Imura

    发明人： Kinya Nagasuna ,  Kenji Kadonaga ,  Akiko Mitsuhashi ,  Motohiro Imura

    IPC分类号： A61F13/15

    CPC分类号： A61F13/53 ,  A61F13/15203 ,  A61F13/5376 ,  A61F2013/15463 ,  A61F2013/15487 ,  A61F2013/1552 ,  A61L15/60 ,  C08J3/12 ,  C08J2300/14 ,  C08J2333/06 ,  C08L101/14 ,  G01N5/025

    摘要： The present invention provides: an absorbent structure and an absorbent article, which are excellent in both liquid diffusion ability and liquid storage ability, and which are excellent in the dry feeling and the amount of wet back of the aqueous liquid, and which can realize the thinning and lightening more; and a water-absorbent resin fitly usable for the above absorbent structure and absorbent article. The absorbent structure, according to the present invention, comprises a liquid-diffusing member and a water-absorbent resin, with the absorbent structure being characterized in that when the capillary absorption index of the liquid-diffusing member at a height of 40 cm is referred to as A (A≧0.10), the capillary absorption index B of the water-absorbent resin at a height of 40 cm satisfies the following equation: B/A≧0.7 (equation 1).

    摘要翻译： 本发明提供一种吸收结构体和吸收性物品，它们的液体扩散能力和储液能力均优异，并且水溶液的干燥感和湿润量优异，可实现 变薄和变亮更多; 以及适用于上述吸收性结构体和吸收性物品的吸水性树脂。 根据本发明的吸收结构包括液体扩散构件和吸水性树脂，其吸收结构的特征在于当参考在40cm的高度处的液体扩散构件的毛细管吸收指数 为A（A> = 0.10）时，吸收性树脂的高度为40cm的毛细管吸收指数B满足下式：B / A> = 0.7（等式1）。

    Absorbent resin composition
    33.
    发明授权
    Absorbent resin composition 有权
    吸收性树脂组合物

    公开(公告)号：US07250459B2

    公开(公告)日：2007-07-31

    申请号：US11228332

    申请日：2005-09-19

    申请人： Yorimichi Dairoku ,  Kinya Nagasuna ,  Yoshihiko Masuda ,  Nobuyuki Harada ,  Yoshihiro Motono ,  Kunihiko Ishizaki

    发明人： Yorimichi Dairoku ,  Kinya Nagasuna ,  Yoshihiko Masuda ,  Nobuyuki Harada ,  Yoshihiro Motono ,  Kunihiko Ishizaki

    IPC分类号： C08K5/09

    CPC分类号： C08J3/245 ,  A61L15/24 ,  A61L15/60 ,  C08F220/06 ,  C08J2300/14 ,  C08L33/02

    摘要： A method for the production of a water-absorbent agent comprises mixing an absorbent resin containing a carboxyl group with an additive soluble in the aqueous solution of at least one member selected from the group consisting of inorganic acids, organic acids, and polyamino acids and a cross-linking agent capable of reacting with the carboxyl group. A water-absorbent agent obtained by adding from 0.005 to 8 parts by weight of an epoxy compound to 100 parts by weight of a water-absorbent resin, exhibiting an absorption capacity without load of at least 45 (g/g), an absorption capacity under load of 20 g/cm2 of not less than 30 (ml/g) and having a residue amount of an epoxy compound of not more than 2 ppm. A water-absorbent composition comprises a polyamino acid (salt) and a water-absorbent resin containing a carboxyl group.

    摘要翻译： 制造吸水剂的方法包括将含羧基的吸收性树脂与可溶于选自无机酸，有机酸和聚氨基酸中的至少一种的水溶液中的添加剂混合，以及 能够与羧基反应的交联剂。 通过将0.005〜8重量份的环氧化合物与100重量份的吸水性树脂相加而获得的吸水剂，其表现出无负载的吸收能力为至少45（g / g），吸收能力 在20g / cm 2以下的负载不小于30（ml / g），残留量为不大于2ppm的环氧化合物。 吸水性组合物包含聚氨基酸（盐）和含有羧基的吸水性树脂。

    Method for production of absorbent resin excelling in durability
    36.
    发明授权
    Method for production of absorbent resin excelling in durability 失效
    制造耐用性优异的吸水性树脂的方法

    公开(公告)号：US06335406B1

    公开(公告)日：2002-01-01

    申请号：US08026167

    申请日：1993-03-01

    申请人： Kinya Nagasuna ,  Kenji Kadonaga ,  Kazumasa Kimura ,  Tadao Shimomura

    发明人： Kinya Nagasuna ,  Kenji Kadonaga ,  Kazumasa Kimura ,  Tadao Shimomura

    IPC分类号： C08F200

    CPC分类号： C08F220/04

    摘要： A method for the production of (D) an absorbent resin excelling in durability, which method comprises polymerizing (A) 30% by weight to saturated concentration of (A) an aqueous water-soluble ethylenically unsaturated monomer solution containing (B) 0.005 to 5 mol % of a cross-linking agent and (C) 0.001 to 1 mol % of a water-soluble chain transfer agent, both based on the amount of said monomer (A), and if necessary, the surface region of the resultant absorbent resin (D) is cross-linked with (E) a hydrophilic cross-linking agent capable of reacting with the functional group of the absorbent resin and an absorbent resin obtained by such method.

    摘要翻译： 一种制备（D）耐久性优异的吸水树脂的方法，该方法包括将（A）含有（B）0.005-5的（A）水溶性烯属不饱和单体溶液的饱和浓度为30重量％的（A） 摩尔％的交联剂和（C）0.001〜1摩尔％的水溶性链转移剂，均基于所述单体（A）的量，如果需要，所得吸收性树脂的表面积 （D）与（E）能够与吸收性树脂的官能团反应的亲水性交联剂和通过这种方法得到的吸收性树脂交联。

    Production process for water-absorbing agent
    37.
    发明授权
    Production process for water-absorbing agent 有权
    吸水剂生产工艺

    公开(公告)号：US06265488B1

    公开(公告)日：2001-07-24

    申请号：US09253858

    申请日：1999-02-21

    申请人： Shinichi Fujino ,  Masatoshi Nakamura ,  Kinya Nagasuna

    发明人： Shinichi Fujino ,  Masatoshi Nakamura ,  Kinya Nagasuna

    IPC分类号： C08L3302

    CPC分类号： B01J20/267 ,  C08F8/00 ,  C08F2810/20 ,  C08F220/06

    摘要： The invention provides a process for producing a water-absorbing agent by using a crosslinking agent of high molecular weight, wherein the water-absorbing agent is excellent with good balance in respect to the absorption capacities under no load and under a heavy load and can display excellent absorption properties even if the weight percentage of the water-absorbent resin (resin concentration) is high when the water-absorbent resin is used for materials such as hygienic products. In a production process for a water-absorbing agent comprising the steps of mixing a water-absorbent resin with a crosslinking agent and heating the resultant mixture wherein the water-absorbent resin has a carboxyl group; the invention is characterized in that the crosslinking agent has a group reactable upon the carboxyl group, an average molecular weight of 500 or more, and a repeating structural unit of general formula (1) below: —[(CH2CH2O)m—CH2—CH(OH)CH2—O]—  (1) wherein m is an integer of 1 to 10.

    摘要翻译： 本发明提供了一种通过使用高分子量交联剂制备吸水剂的方法，其中吸水剂在空载和重载下的吸收容量方面具有优异的平衡性，并能显示出 即使吸水性树脂用于卫生产品等材料，即使吸水性树脂（树脂浓度）的重量百分比较高，吸收性也优异。 在吸水剂的制造方法中，包括以下步骤：将吸水性树脂与交联剂混合，加热所得到的混合物，其中吸水性树脂具有羧基; 本发明的特征在于交联剂具有可在羧基上反应的基团，平均分子量为500以上的基团和下述通式（1）的重复结构单元：其中m为1〜10的整数。

    Process for manufacturing an absorbing agent and absorbent material
    38.
    发明授权
    Process for manufacturing an absorbing agent and absorbent material 失效
    制造吸收剂和吸收材料的方法

    公开(公告)号：US06180724B2

    公开(公告)日：2001-01-30

    申请号：US09330563

    申请日：1999-06-11

    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： C08F832

    CPC分类号： A61F13/53 ,  A61F13/15203 ,  A61L15/60 ,  C08F220/00 ,  C08F220/06 ,  C08L33/02

    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。

    Absorbent article and production process therefor
    39.
    发明授权
    Absorbent article and production process therefor 失效
    吸收制品及其生产工艺

    公开(公告)号：US06150582A

    公开(公告)日：2000-11-21

    申请号：US82923

    申请日：1998-05-21

    申请人： Katsuyuki Wada ,  Naoko Takahashi ,  Hiroko Ueda ,  Kinya Nagasuna

    发明人： Katsuyuki Wada ,  Naoko Takahashi ,  Hiroko Ueda ,  Kinya Nagasuna

    IPC分类号： A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/16 ,  A61L15/60 ,  B01J20/26 ,  B01J20/28 ,  B32B27/00 ,  C08K7/02 ,  C08L101/14 ,  A61F13/20

    CPC分类号： A61F13/531 ,  A61F13/15203 ,  A61L15/60 ,  A61F2013/15463

    摘要： The invention clarifies absorption properties of a water-absorbent resin as needed in the case where the ratio by weight of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material is ".alpha.," and further the invention provides an absorbent article using a water-absorbent resin which is optimal to the ratio by weight ".alpha." of the water-absorbent resin. A water-absorbent resin, having a concentration absorption index of 35 or more as shown by the following equation (1):A(1-.alpha.)+B.alpha. (1)wherein A (g/g) is an absorption capacity of the resin under no load, andB (g/g) is an absorption capacity of the resin under a load, is used as the water-absorbent resin as used for the absorbent article of at least 0.4 in the ratio by weight ".alpha." of the water-absorbent resin to the total of the water-absorbent resin and the fibrous material.

    摘要翻译： 本发明根据吸水性树脂与吸水性树脂和纤维材料的总量的重量比为“α”的情况，根据需要明确了吸水性树脂的吸收特性，进一步本发明提供 使用吸水性树脂的吸收性物品，该吸水性树脂对于吸水性树脂的重量比“α”是最佳的。 浓度吸收指数为35以上的吸水性树脂，如下式（1）所示：A（1-α）+Bα（1）其中A（g / g）为 树脂在负载下的B（g / g）是树脂在负荷下的吸收能力，作为用于吸收性物品的吸水性树脂，以重量比“α”为至少0.4 吸水性树脂与吸水性树脂和纤维材料的总量相同。