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JP2006299234A5 - - Google Patents

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Publication number
JP2006299234A5
JP2006299234A5 JP2006024841A JP2006024841A JP2006299234A5 JP 2006299234 A5 JP2006299234 A5 JP 2006299234A5 JP 2006024841 A JP2006024841 A JP 2006024841A JP 2006024841 A JP2006024841 A JP 2006024841A JP 2006299234 A5 JP2006299234 A5 JP 2006299234A5
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Prior art keywords
gel
absorbent resin
granulated
solid content
producing
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JP2006024841A
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JP2006299234A (en
JP5046522B2 (en
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Priority to JP2006024841A priority Critical patent/JP5046522B2/en
Priority claimed from JP2006024841A external-priority patent/JP5046522B2/en
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Publication of JP2006299234A5 publication Critical patent/JP2006299234A5/ja
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Claims (6)

アクリル酸および／またはその塩を主成分とするモノマーを重合させて吸水性を有する重合ゲルを得る工程と、
吸水性樹脂の製造において得られ重量平均粒子径が１０〜１５０μｍの範囲内である微粉に、熱分解型ラジカル重合開始剤、酸化剤および還元剤からなる群より選ばれる少なくとも１種の添加剤を含む水性液を添加することにより、造粒されたゲルを得る工程と、
前記造粒されたゲルと前記重合ゲルとを共存させて乾燥する工程とを含む吸水性樹脂の製造方法。 A step of polymerizing a monomer mainly composed of acrylic acid and / or a salt thereof to obtain a polymer gel having water absorption;
At least one additive selected from the group consisting of a thermal decomposition type radical polymerization initiator, an oxidizing agent and a reducing agent is added to the fine powder obtained in the production of the water absorbent resin and having a weight average particle diameter in the range of 10 to 150 μm. A step of obtaining a granulated gel by adding an aqueous liquid containing;
A method for producing a water-absorbent resin comprising a step of drying the granulated gel and the polymerized gel together. 前記水性液は、微粉に添加される前に予め加熱される請求項１に記載の吸水性樹脂の製造方法。   The method for producing a water absorbent resin according to claim 1, wherein the aqueous liquid is heated in advance before being added to the fine powder. 前記添加剤は、過硫酸塩を含む請求項１又は２に記載の吸水性樹脂の製造方法。   The method for producing a water absorbent resin according to claim 1, wherein the additive contains a persulfate. 前記造粒されたゲルと前記重合ゲルとを共存させて乾燥する工程において、造粒されたゲルの固形分率Ａ（％）と重合ゲルの固形分率Ｂ（％）との比（Ａ／Ｂ）が、１／３以上３以下となっている請求項１から３のいずれかに記載の吸水性樹脂の製造方法。   In the step of drying the granulated gel and the polymer gel together, the ratio of the solid content ratio A (%) of the granulated gel to the solid content ratio B (%) of the polymer gel (A / The method for producing a water absorbent resin according to any one of claims 1 to 3, wherein B) is 1/3 or more and 3 or less. 前記造粒されたゲルと前記重合ゲルとを共存させて乾燥する工程において、造粒されたゲル中の固形分量が重合ゲル中の固形分量に対して４０重量％以下となるようにする、請求項１から４までのいずれかに記載の吸水性樹脂の製造方法。 In the step of allowing the granulated gel and the polymer gel to coexist and drying, the solid content in the granulated gel is 40% by weight or less based on the solid content in the polymer gel. Item 5. A method for producing a water absorbent resin according to any one of Items 1 to 4. 吸水性を有する重合ゲルと、造粒されたゲルとを含む吸水性樹脂であって、前記造粒されたゲルは、重量平均粒子径が１０〜１５０μｍの範囲内である微粉からなり、前記造粒
されたゲルの固形分率Ａ（％）と重合ゲルの固形分率Ｂ（％）との比（Ａ／Ｂ）が、１／３以上３以下であり、残存モノマーが０以上５００ｐｐｍ以下である吸水性樹脂。 A water-absorbing resin comprising a polymer gel having water absorption and a granulated gel, wherein the granulated gel is made of fine powder having a weight average particle diameter in the range of 10 to 150 μm, and The ratio (A / B) of the solid content rate A (%) of the granulated gel and the solid content rate B (%) of the polymerized gel is 1/3 or more and 3 or less, and the residual monomer is 0 or more and 500 ppm or less. Some water absorbent resin.
JP2006024841A 2005-02-15 2006-02-01 Water absorbent resin and method for producing the same Active JP5046522B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006024841A JP5046522B2 (en) 2005-02-15 2006-02-01 Water absorbent resin and method for producing the same

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2005038123 2005-02-15
JP2005038123 2005-02-15
JP2005089307 2005-03-25
JP2005089307 2005-03-25
JP2006024841A JP5046522B2 (en) 2005-02-15 2006-02-01 Water absorbent resin and method for producing the same

Publications (3)

Publication Number Publication Date
JP2006299234A JP2006299234A (en) 2006-11-02
JP2006299234A5 true JP2006299234A5 (en) 2008-12-18
JP5046522B2 JP5046522B2 (en) 2012-10-10

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JP2006024841A Active JP5046522B2 (en) 2005-02-15 2006-02-01 Water absorbent resin and method for producing the same

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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101605818B (en) * 2007-02-06 2012-10-03 巴斯夫欧洲公司 Method for producing water-absorbent polymer particles by the polymerisation of droplets of a monomer solution
CN102066431B (en) * 2008-06-19 2012-10-03 巴斯夫欧洲公司 Method for continuously producing water-absorbing polymer particles
WO2010006937A1 (en) * 2008-07-15 2010-01-21 Basf Se Method for producing water-absorbing polymer particles
EP2471847B2 (en) * 2009-08-28 2018-01-03 Nippon Shokubai Co., Ltd. Process for production of water-absorbable resin
JP5718816B2 (en) * 2009-09-16 2015-05-13 株式会社日本触媒 Method for producing water absorbent resin powder
JP6169926B2 (en) * 2013-08-30 2017-07-26 株式会社日本触媒 Water-absorbing resin with excellent water-absorbing resin pulverization method and salt resistance
WO2016056867A1 (en) 2014-10-08 2016-04-14 주식회사 엘지화학 Method for preparing super absorbent resin assembly
KR101782501B1 (en) 2014-12-10 2017-09-27 주식회사 엘지화학 Preparation method for super absorbent polymer
KR102589018B1 (en) 2018-05-16 2023-10-16 가부시키가이샤 닛폰 쇼쿠바이 Method for producing absorbent resin
KR102566285B1 (en) * 2018-12-19 2023-08-10 주식회사 엘지화학 Preparation method of spinning solution for super absorbent polymer resin fiber
JPWO2021049451A1 (en) * 2019-09-09 2021-03-18
JP2023523615A (en) * 2021-01-14 2023-06-06 エルジー・ケム・リミテッド Method for producing super absorbent polymer
CN116783234A (en) * 2021-01-29 2023-09-19 株式会社日本触媒 Method for producing water-absorbent resin
EP4442736A1 (en) * 2022-01-18 2024-10-09 Matsumoto Yushi-Seiyaku Co., Ltd. Particles and use thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56103207A (en) * 1980-01-22 1981-08-18 Sumitomo Chem Co Ltd Preparation of dried high-molecular weight water-soluble polymer
JPH06192319A (en) * 1992-12-25 1994-07-12 Nippon Shokubai Co Ltd Production of water-absorbing resin
JP3979724B2 (en) * 1997-06-18 2007-09-19 株式会社日本触媒 Method for producing dried product of water absorbent resin granulated product
JP2000026510A (en) * 1998-07-06 2000-01-25 Sanyo Chem Ind Ltd Production of resin and water-absorbing resin

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