公开(公告)号：EP1874863A4

公开(公告)日：2009-05-27

申请号：EP06731731

申请日：2006-04-06

申请人： NIPPON CATALYTIC CHEM IND

发明人： NAKASHIMA YASUHISA ,  TAKAAI TOSHIHIRO ,  WADA KATSUYUKI

IPC分类号： C08L33/02 ,  A61F13/49 ,  A61F13/53 ,  A61L15/60

CPC分类号： A61L15/60 ,  Y10T428/2982

摘要： The present invention provides a particulate water absorbing agent for absorbent cores which is excellent in powder conveying property, and achieves sufficient absorption performances for use in absorbent cores in particulate water absorbing agents including a water absorbing resin as a principal component, and which further is suitable for practical applications. In the present invention, characteristics that had not been known conventionally at all, i.e., "permeability potential under pressure (PPUP)" and "frictional charge being a positive charge" of the particulate water absorbing agent are regulated at a time, and furthermore, regulation of the "moisture content of 2 to 10% by weight" is perfected. Also, the particulate water absorbing agent including (A) a water-swelling crosslinked polymer having a constitutional unit derived from an unsaturated monomer containing an acid group and/or a salt thereof; and (B) water fulfills certain requirements.

公开(公告)号：EP2527390A4

公开(公告)日：2015-01-07

申请号：EP11734735

申请日：2011-01-20

申请人： NIPPON CATALYTIC CHEM IND

发明人： TAKAAI TOSHIHIRO ,  FUJINO SHINICHI ,  WADA HIDENORI

IPC分类号： C08J3/12 ,  A61L15/56 ,  A61L15/60 ,  B01J20/26 ,  C08F6/00 ,  C08J3/075

CPC分类号： C08F6/008 ,  A61L15/60 ,  B01J20/267 ,  B01J2220/68 ,  C08J3/075 ,  C08J3/12 ,  C08J3/122 ,  C08J2300/14

摘要： With regard to a method for producing a water absorbent resin by drying a particulate hydrogel crosslinked polymer having a high solid content concentration (of 45% by weight or more, further 50% by weight or more, and particularly 55% by weight or more), to provide a method for efficient drying of a water absorbent resin having maintained/improved physical properties. A production method in which a through-circulation belt type dryer or a through-circulation stationary batch type dryer is used in the drying step and the drop and scatter ratio of a particulate hydrogel crosslinked polymer is set to 1% by weight or less.

公开(公告)号：EP2261265A4

公开(公告)日：2012-08-08

申请号：EP09729128

申请日：2009-03-31

申请人： NIPPON CATALYTIC CHEM IND

发明人： TAKAAI TOSHIHIRO ,  DAIROKU YORIMICHI ,  FUJINO SHINICHI

IPC分类号： C08F2/10 ,  A61L15/60 ,  B01J19/00 ,  C07C51/41 ,  C07C51/50 ,  C08F2/48 ,  C08F20/04 ,  C08F20/06 ,  C08J3/24

CPC分类号： C08J3/245 ,  A61L15/60 ,  B01J19/0086 ,  B01J2219/00006 ,  C07C51/41 ,  C07C51/50 ,  C08F2/10 ,  C08F2/48 ,  C08F20/06 ,  C08F220/06 ,  C08F222/1006 ,  C08J2333/02 ,  Y10T137/4673 ,  Y10T137/469 ,  Y10T137/86187

公开(公告)号：EP2415822A4

公开(公告)日：2017-06-07

申请号：EP10758829

申请日：2010-03-31

申请人： NIPPON CATALYTIC CHEM IND

发明人： DAIROKU YORIMICHI ,  TAKAAI TOSHIHIRO ,  FUJINO SHINICHI ,  MATSUMOTO SATOSHI

IPC分类号： C08J3/12 ,  B01J20/26 ,  C08F20/06 ,  C08F220/06 ,  C08J3/24

CPC分类号： C08J3/12 ,  B01J20/267 ,  B01J2220/68 ,  C08F20/06 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02

摘要： A production of a water-absorbent resin by which a particle diameter of the water-absorbent resin can be controlled simply and conveniently, and a content of fine powder can be decreased, without necessity of change of raw materials or expensive facility investment is to be provided. The method is a continuous production method of a polyacrylic acid (salt)-based water-absorbent resin, comprising a polymerization step of an aqueous solution containing acrylic acid (salt), a drying step of the resultant hydrogel-like polymer, a pulverization step of the dried substance, a classification step of the pulverized substance, and optionally a surface cross-linking step of the classified substance, wherein (a) the drying step and the pulverization step are connected via a storage step and a transportation step; and (b) a time of holding the dried substance from a time of completing the drying step to a time of starting the pulverization step is set at 3 minutes or longer.

摘要翻译： 一种吸水性树脂的生产可以简单方便地控制吸水性树脂的粒径，并且可以减少细粉的含量，而不必改变原料或昂贵的设备投资 提供。 该方法是聚丙烯酸（盐）类吸水性树脂的连续生产方法，其包括含有丙烯酸（盐）的水溶液的聚合步骤，所得水凝胶状聚合物的干燥步骤，粉碎步骤 （a）干燥步骤和粉碎步骤通过储存步骤和输送步骤连接;干燥步骤和粉碎步骤通过储存步骤和输送步骤连接;干燥步骤和粉碎步骤通过储存步骤和输送步骤连接; 和（b）从完成干燥步骤到开始粉碎步骤时保持干燥物质的时间设定为3分钟或更长。

公开(公告)号：EP2527391A4

公开(公告)日：2014-10-01

申请号：EP11734736

申请日：2011-01-20

申请人： NIPPON CATALYTIC CHEM IND

发明人： TAKAAI TOSHIHIRO ,  FUJINO SHINICHI ,  WADA HIDENORI

IPC分类号： C08J3/12 ,  B01J20/26 ,  C08F6/10

CPC分类号： C08F6/008 ,  A61L15/60 ,  B01J20/267 ,  B01J20/28004 ,  B01J20/28047 ,  B01J2220/68 ,  C08F6/006 ,  C08F20/04 ,  C08F20/06 ,  C08J3/12 ,  C08J3/245 ,  C08J9/28 ,  C08J2300/14 ,  C08J2333/02 ,  C08L33/02

摘要： In a method for producing a water absorbent resin by drying a particulate hydrogel having a high solid content concentration (of 45% by weight or more, preferably 50% by weight or more, and more preferably 55% by weight or more), a method for efficient drying water absorbent resin having maintained/improved physical properties is provided. Disclosed is a method for producing a water absorbent resin, comprising: a polymerization step to polymerize an unsaturated monomer, and; a drying step to dry a particulate hydrogel crosslinked polymer, which is obtained by micronization of a hydrogel polymer during or after the polymerization and which has a solid content concentration of 45% by weight or more, wherein, an amount of a peroxide in the particulate hydrogel crosslinked polymer to be dried in the drying step is 1 to 100 ppm relative to the weight of the solid content of the particulate hydrogel crosslinked polymer, and a drying temperature of the particulate hydrogel crosslinked polymer in the drying step is 160°C or more.

公开(公告)号：EP2589613A4

公开(公告)日：2014-06-25

申请号：EP11800917

申请日：2011-06-29

申请人： NIPPON CATALYTIC CHEM IND

发明人： TAKAAI TOSHIHIRO ,  WADA HIDENORI ,  FUJINO SHINICHI

IPC分类号： C08F20/06 ,  A61L15/60 ,  C08F220/06 ,  C08J3/12 ,  C08J9/12

CPC分类号： C08J9/122 ,  A61L15/24 ,  A61L15/60 ,  C08F2/01 ,  C08F20/00 ,  C08F220/06 ,  C08J3/245 ,  C08J9/20 ,  C08J9/36 ,  C08J2203/06 ,  C08J2205/05 ,  C08J2333/02 ,  C08J2335/02 ,  Y10T428/2982 ,  C08L33/02 ,  C08F2222/1013

公开(公告)号：EP2518092A4

公开(公告)日：2013-05-22

申请号：EP10839528

申请日：2010-12-23

申请人： NIPPON CATALYTIC CHEM IND

发明人： NAKATSURU REIKO ,  SAKAMOTO SHIGERU ,  TORII KAZUSHI ,  TAKAAI TOSHIHIRO

IPC分类号： C08F20/06 ,  A61L15/60 ,  C08F220/06 ,  C08J3/12

CPC分类号： C08J3/12 ,  A61L15/48 ,  A61L15/60 ,  C08F20/06 ,  C08F220/06 ,  C08J2333/08 ,  C08J2333/10 ,  C08L33/02

摘要： A process according to the present invention for production of water-absorbable polyacrylic acid resin powder, including: (a) polymerizing an acrylic acid-based monomer aqueous solution containing bubbles, and (b) drying a hydrogel crosslinked polymer thus obtained in the step of polymerizing, further includes (c) lowering solubility of dissolved gas in a monomer aqueous solution in the presence of a surfactant and/or a dispersing agent, so as to generate the bubbles in the acrylic acid-based monomer aqueous solution. With this arrangement, it is possible to provide white water-absorbable resin with better water absorbing rate, keeping or without significantly losing the other properties (permeability potential, bulk specific gravity, surface tension, absorbency against pressure, impact resistance, etc.)

摘要翻译： 根据本发明的用于制造吸水性聚丙烯酸树脂粉末的方法，包括：（a）聚合含有气泡的丙烯酸类单体水溶液，和（b）将由此得到的水凝胶交联聚合物干燥， 聚合还包括（c）在表面活性剂和/或分散剂存在下降低溶解气体在单体水溶液中的溶解度，以便在丙烯酸类单体水溶液中产生气泡。 通过这种布置，可以提供具有更好吸水速率的白色吸水性树脂，保持或不显着损失其它性能（渗透性潜力，体积比重，表面张力，抗压力，抗冲击性等）

公开(公告)号：EP2189478A4

公开(公告)日：2011-02-23

申请号：EP08828813

申请日：2008-08-27

申请人： NIPPON CATALYTIC CHEM IND

发明人： MATSUMOTO MAKOTO ,  TAKAAI TOSHIHIRO ,  DAIROKU YORIMICHI ,  FUJINO SHINICHI ,  MATSUMOTO SATOSHI ,  KATO SEIJI

IPC分类号： C08F6/00 ,  B01J8/24 ,  C08F20/04

CPC分类号： C08F6/008 ,  C08F20/06 ,  C08J3/12 ,  C08J3/126 ,  C08J3/245 ,  C08J2300/14 ,  F26B3/08