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BRPI0507793A - processo para a produção de um polìmero absorvente de água, e, polìmero absorvente de água - Google Patents

processo para a produção de um polìmero absorvente de água, e, polìmero absorvente de água

Info

Publication number
BRPI0507793A
BRPI0507793A BRPI0507793-1A BRPI0507793A BRPI0507793A BR PI0507793 A BRPI0507793 A BR PI0507793A BR PI0507793 A BRPI0507793 A BR PI0507793A BR PI0507793 A BRPI0507793 A BR PI0507793A
Authority
BR
Brazil
Prior art keywords
absorbing polymer
water absorbing
production
polymer
aqueous solution
Prior art date
Application number
BRPI0507793-1A
Other languages
English (en)
Inventor
Ulrich Riegel
Thomas Daniel
Matthias Weismantel
Mark Elliott
Dieter Hermeling
Original Assignee
Basf Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34853736&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BRPI0507793(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Basf Ag filed Critical Basf Ag
Publication of BRPI0507793A publication Critical patent/BRPI0507793A/pt
Publication of BRPI0507793B1 publication Critical patent/BRPI0507793B1/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C08J3/245—Differential crosslinking of one polymer with one crosslinking type, e.g. surface crosslinking
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/22—Emulsion polymerisation
    • C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/04—Acids, Metal salts or ammonium salts thereof
    • C08F20/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers
    • C08J2300/14—Water soluble or water swellable polymers, e.g. aqueous gels

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

PROCESSO PARA A PRODUçãO DE UM POLìMERO ABSORVENTE DE áGUA, E, POLìMERO ABSORVENTE DE áGUA. A presente invenção refere-se a um processo para a produção de polímero absorvente de água. De acordo com a invenção, um polímero base (A) que é produzido à base de um monómero inclusive grupos ácido até pelo menos <198> neutralizados é misturado com uma primeira solução aquosa (B) que contém pelo menos um agente reticulante secundário de superfície e com uma segunda solução aquosa (C) que contém pelo menos um cátion polivalente e é tratado termicamente. As soluções aquosas B e C são pelo menos parcialmente dosadas de uma maneira simultânea por meio de jatos separados. é obtido um polímero absorvente de água que tem alta capacidade de transmissão de fluído.
BRPI0507793A 2004-02-24 2005-02-18 processo para a produção de um polímero absorvente de água, e, polímero absorvente de água BRPI0507793B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004009438A DE102004009438A1 (de) 2004-02-24 2004-02-24 Verfahren zur Oberflächennachvernetzung wasserabsorbierender Polymere
PCT/EP2005/001673 WO2005080479A1 (de) 2004-02-24 2005-02-18 Verfahren zur nachvernetzung wasserabsorbierender polymere

Publications (2)

Publication Number Publication Date
BRPI0507793A true BRPI0507793A (pt) 2007-07-17
BRPI0507793B1 BRPI0507793B1 (pt) 2016-07-26

Family

ID=34853736

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0507793A BRPI0507793B1 (pt) 2004-02-24 2005-02-18 processo para a produção de um polímero absorvente de água, e, polímero absorvente de água

Country Status (11)

Country Link
US (2) US7981969B2 (pt)
EP (1) EP1720934B2 (pt)
JP (1) JP4395531B2 (pt)
KR (1) KR101096371B1 (pt)
CN (1) CN100584877C (pt)
AT (1) ATE506393T1 (pt)
BR (1) BRPI0507793B1 (pt)
DE (2) DE102004009438A1 (pt)
TW (1) TWI357913B (pt)
WO (1) WO2005080479A1 (pt)
ZA (1) ZA200607943B (pt)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038015A1 (de) * 2004-08-04 2006-03-16 Basf Ag Verfahren zur Nachvernetzung wasserabsorbierender Polymere mit zyklischen Carba-maten und/oder zyklischen Harnstoffen
DE102004051242A1 (de) 2004-10-20 2006-05-04 Basf Ag Feinteilige wasserabsorbierende Polymerpartikel mit hoher Flüssigkeitstransport- und Absorptionsleistung
JP5591467B2 (ja) * 2005-09-30 2014-09-17 株式会社日本触媒 水性液吸収剤およびその製造方法
US20080281049A1 (en) * 2005-12-05 2008-11-13 Basf Se Process for Preparing Water-Absorbing Polymers with High Absorption Capacity and High Permeability
US20090012486A1 (en) * 2005-12-28 2009-01-08 Basf Se Process for Production of a Water-Absorbing Material
US20090239071A1 (en) * 2006-07-19 2009-09-24 Uwe Stueven Method for Producing Water-Absorbent Polymer Particles with a Higher Permeability by Polymerising Droplets of a Monomer Solution
BRPI0714445B8 (pt) * 2006-07-19 2021-06-22 Basf Se processo para preparar partículas poliméricas absorvedoras de água, partículas poliméricas absorvedoras de água, uso das partículas poliméricas, e, artigo de higiene
US8202957B2 (en) 2006-07-19 2012-06-19 Basf Se Method for producing post-cured water-absorbent polymer particles with a higher absorption by polymerising droplets of a monomer solution
EP2073943B2 (de) * 2006-09-25 2020-09-02 Basf Se Verfahren zum klassieren wasserabsorbierender polymerpartikel
WO2008037675A1 (de) 2006-09-25 2008-04-03 Basf Se Verfahren zum klassieren wasserabsorbierender polymerpartikel
CN101595141A (zh) * 2007-01-29 2009-12-02 巴斯夫欧洲公司 制备具有高吸收性和盐水导流率的白色且颜色稳定的吸水性聚合物粒子的方法
EP2114471B1 (de) * 2007-01-29 2013-10-16 Basf Se VERFAHREN ZUR HERSTELLUNG WEIßER UND FARBSTABILER WASSERABSORBIERENDER POLYMERPARTIKEL MIT HOHEM ABSORPTIONSVERMÖGEN UND HOHER FLÜSSIGKEITSLEITFÄHIGKEIT
DE102008000237A1 (de) 2007-02-06 2008-08-07 Basf Se Phenol-Imidazolderivate zur Stabilisierung von polymerisationsfähigen Verbindungen
CN101903441A (zh) * 2007-12-19 2010-12-01 巴斯夫欧洲公司 生产表面交联的超吸收剂的方法
US8394895B2 (en) * 2008-06-13 2013-03-12 Basf Se Method for the continuous thermal secondary surface cross-linking of water-absorbing polymer particles
WO2010057823A1 (de) * 2008-11-21 2010-05-27 Basf Se Gemisch von oberflächennachvernetzten superabsorbern mit unterschiedlicher oberflächennachvernetzung
WO2010124954A1 (de) * 2009-04-30 2010-11-04 Basf Se Verfahren zur abtrennung metallischer verunreinigungen
EP2471846B1 (en) 2009-08-27 2016-12-21 Nippon Shokubai Co., Ltd. Polyacrylic acid (salt) water absorbent resin and method for producing same
US10066064B2 (en) 2009-10-09 2018-09-04 Basf Se Process for remoisturizing surface-postcrosslinked water-absorbing polymer particles
JP5850841B2 (ja) 2009-10-09 2016-02-03 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ 表面後架橋された吸水性ポリマー粒子の後給湿方法
JP5605855B2 (ja) 2010-02-10 2014-10-15 株式会社日本触媒 吸水性樹脂粉末の製造方法
WO2011111856A1 (ja) 2010-03-12 2011-09-15 株式会社日本触媒 吸水性樹脂の製造方法
EP2565211B1 (en) * 2010-04-26 2017-10-25 Nippon Shokubai Co., Ltd. Polyacrylic acid (salt), polyacrylic acid (salt)-based water-absorbing resin, and process for producing same
US20130037708A1 (en) * 2010-04-26 2013-02-14 Nippon Shokubai Co., Ltd. Polyacrylic acid (salt), polyacrylic acid (salt)-based water-absorbing resin, and process for producing same
CN103249745A (zh) 2010-10-06 2013-08-14 巴斯夫欧洲公司 热表面后交联的吸水性聚合物颗粒的制备方法
WO2012052365A1 (en) 2010-10-21 2012-04-26 Basf Se Water-absorbing polymeric particles and method for the production thereof
CN103459473B (zh) * 2011-01-28 2016-04-13 株式会社日本触媒 聚丙烯酸(盐)系吸水性树脂粉末的制造方法
CN103502324B (zh) * 2011-05-06 2015-12-23 巴斯夫欧洲公司 制备吸水聚合物颗粒的方法
JP2015506406A (ja) * 2012-02-06 2015-03-02 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ 吸水性ポリマー粒子の製造法
US20130260032A1 (en) * 2012-03-30 2013-10-03 Basf Se Process for Thermal Postcrosslinking in a Drum Heat Exchanger with an Inverse Screw Helix
EP2826807B1 (en) 2012-04-25 2018-02-28 LG Chem, Ltd. Super absorbent polymer and method for manufacturing same
JP5914677B2 (ja) 2012-09-11 2016-05-11 株式会社日本触媒 ポリアクリル酸（塩）系吸水剤の製造方法及びその吸水剤
JP6002773B2 (ja) 2012-09-11 2016-10-05 株式会社日本触媒 ポリアクリル酸（塩）系吸水剤の製造方法及びその吸水剤
US9375507B2 (en) 2013-04-10 2016-06-28 Evonik Corporation Particulate superabsorbent polymer composition having improved stability
US9302248B2 (en) 2013-04-10 2016-04-05 Evonik Corporation Particulate superabsorbent polymer composition having improved stability
KR101604272B1 (ko) 2013-05-09 2016-03-25 주식회사 엘지화학 고흡수성 수지의 제조방법
EP3085439B1 (en) 2013-12-20 2023-10-04 Nippon Shokubai Co., Ltd. Water absorbing agent based on polyacrylic acid and/or a salt thereof
JP6737571B2 (ja) * 2014-07-11 2020-08-12 住友精化株式会社 吸水性樹脂及び吸収性物品
EP3009474B1 (de) 2014-10-16 2017-09-13 Evonik Degussa GmbH Herstellverfahren für wasserlösliche Polymere
CN107548319A (zh) * 2015-02-25 2018-01-05 巴斯夫欧洲公司 通过聚合单体溶液的液滴制备表面后交联的吸水性聚合物颗粒的方法
KR101919985B1 (ko) * 2015-06-10 2018-11-19 주식회사 엘지화학 내파쇄성 고흡수성 수지 및 그 제조방법
CN107847905A (zh) 2015-07-01 2018-03-27 株式会社日本触媒 颗粒状吸水剂
US11325990B2 (en) * 2016-08-10 2022-05-10 Basf Se Method for the production of superabsorbers
CN111868145B (zh) * 2018-03-29 2023-07-28 三大雅株式会社 吸水性树脂颗粒及其制造方法
DE102019216910A1 (de) 2018-11-12 2020-05-14 Basf Se Verfahren zur Oberflächennachvernetzung von Superabsorbern

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623977A (en) * 1970-06-25 1971-11-30 Fmc Corp Sewage treatment process
JPS6018690B2 (ja) 1981-12-30 1985-05-11 住友精化株式会社 吸水性樹脂の吸水性改良方法
JPS58180233A (ja) * 1982-04-19 1983-10-21 Nippon Shokubai Kagaku Kogyo Co Ltd 吸収剤
CA2004864A1 (en) 1988-12-08 1990-06-08 Kinya Nagasuna Method for production of absorbent resin excelling in durability
ES2097235T3 (es) 1991-09-03 1997-04-01 Hoechst Celanese Corp Polimero superabsorbente que tiene propiedades de absorcion mejoradas.
DE4138408A1 (de) * 1991-11-22 1993-05-27 Cassella Ag Hydrophile, hochquellfaehige hydrogele
US5385983A (en) * 1992-11-12 1995-01-31 The Dow Chemical Company Process for preparing a water-absorbent polymer
US5599335A (en) * 1994-03-29 1997-02-04 The Procter & Gamble Company Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absorbent polymer
JP3482575B2 (ja) * 1994-10-12 2003-12-22 能美防災株式会社 レンジフード及び排煙ダクト内火災の消火装置
US5884841A (en) * 1997-04-25 1999-03-23 Ratnik Industries, Inc. Method and apparatus for making snow
DE19807502B4 (de) 1998-02-21 2004-04-08 Basf Ag Verfahren zur Nachvernetzung von Hydrogelen mit 2-Oxazolidinonen, daraus hergestellte Hydrogele und deren Verwendung
US6503979B1 (en) 1998-02-26 2003-01-07 Basf Aktiengesellschaft Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones
DE19846412A1 (de) * 1998-10-08 2000-04-13 Basf Ag Hydrophile hochquellfähige Hydrogele sowie Verfahren zu ihrer Herstellung und Verwendung
DE19854573A1 (de) * 1998-11-26 2000-05-31 Basf Ag Verfahren zur Nachvernetzung von Hydrogelen mit 2-Oxo-tetrahydro-1,3-oxazinen
DE19854574A1 (de) 1998-11-26 2000-05-31 Basf Ag Verfahren zur Nachvernetzung von Hydrogelen mit N-Acyl-2-Oxazolidinonen
DE19909838A1 (de) 1999-03-05 2000-09-07 Stockhausen Chem Fab Gmbh Pulverförmige, vernetzte, wässrige Flüssigkeiten sowie Blut absorbierende Polymere, Verfahren zu ihrer Herstellung und ihre Verwendung
DE19909653A1 (de) 1999-03-05 2000-09-07 Stockhausen Chem Fab Gmbh Pulverförmige, vernetzte, wässrige Flüssigkeiten sowie Blut absorbierende Polymere, Verfahren zu ihrer Herstellung und ihre Verwendung
US6239230B1 (en) * 1999-09-07 2001-05-29 Bask Aktiengesellschaft Surface-treated superabsorbent polymer particles
DE10043706A1 (de) * 2000-09-04 2002-04-25 Stockhausen Chem Fab Gmbh Pulverförmige, vernetzte, wässrige Flüssigkeiten sowie Blut absorbierende Polymere, Verfahren zu ihrer Herstellung und ihre Verwendung
DE10043710B4 (de) 2000-09-04 2015-01-15 Evonik Degussa Gmbh Verwendung pulverförmiger an der Oberfläche nachvernetzter Polymerisate und Hygieneartikel
US6720389B2 (en) † 2000-09-20 2004-04-13 Nippon Shokubai Co., Ltd. Water-absorbent resin and production process therefor
EP1347790A1 (de) * 2000-12-29 2003-10-01 Basf Aktiengesellschaft Aborbierende zusammensetzungen
US6902637B2 (en) * 2001-01-23 2005-06-07 Trw Inc. Process for preparing free-flowing particulate phase stabilized ammonium nitrate
EP1425320B1 (de) * 2001-06-28 2006-09-20 Basf Aktiengesellschaft Saure hochquellfähige hydrogele
EP1427452A1 (de) * 2001-09-07 2004-06-16 Basf Aktiengesellschaft Super-absorbierende hydrogele bestimmter teilchengroessenverteilung
ATE287904T1 (de) 2001-10-05 2005-02-15 Basf Ag Verfahren zur vernetzung von hydrogelen mit morpholin-2,3-dionen
DE10239074A1 (de) † 2002-08-26 2004-03-11 Basf Ag Wasserabsorbierendes Mittel und Verfahren zu seiner Herstellung
EP1516884B2 (en) 2003-09-19 2023-02-22 Nippon Shokubai Co., Ltd. Water-absorbent resin having treated surface and process for producing the same

Also Published As

Publication number Publication date
EP1720934B1 (de) 2011-04-20
TWI357913B (en) 2012-02-11
JP2007523254A (ja) 2007-08-16
KR101096371B1 (ko) 2011-12-20
US7981969B2 (en) 2011-07-19
DE102004009438A1 (de) 2005-09-15
US20110257341A1 (en) 2011-10-20
EP1720934A1 (de) 2006-11-15
CN100584877C (zh) 2010-01-27
CN1922243A (zh) 2007-02-28
ATE506393T1 (de) 2011-05-15
ZA200607943B (en) 2008-06-25
WO2005080479A1 (de) 2005-09-01
EP1720934B2 (de) 2018-04-11
TW200602391A (en) 2006-01-16
US8258223B2 (en) 2012-09-04
US20070161759A1 (en) 2007-07-12
DE502005011278D1 (de) 2011-06-01
BRPI0507793B1 (pt) 2016-07-26
JP4395531B2 (ja) 2010-01-13
KR20070032299A (ko) 2007-03-21

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B06F Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

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