WO2006069109A1 - Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation - Google Patents

Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation Download PDF

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Publication number
WO2006069109A1
WO2006069109A1 PCT/US2005/046268 US2005046268W WO2006069109A1 WO 2006069109 A1 WO2006069109 A1 WO 2006069109A1 US 2005046268 W US2005046268 W US 2005046268W WO 2006069109 A1 WO2006069109 A1 WO 2006069109A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluorosurfactant
dispersion
exchange resin
anion exchange
aqueous fluoropolymer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2005/046268
Other languages
English (en)
French (fr)
Inventor
David William Johnson
Robert John Cavanaugh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to EP05854908A priority Critical patent/EP1828260B1/en
Priority to DE602005024300T priority patent/DE602005024300D1/de
Priority to CN2005800441817A priority patent/CN101087814B/zh
Priority to JP2007548406A priority patent/JP5017123B2/ja
Publication of WO2006069109A1 publication Critical patent/WO2006069109A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/14—Treatment of polymer emulsions
    • C08F6/16—Purification
    • 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
    • C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
    • C08F14/18—Monomers containing fluorine
    • 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
    • C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
    • C08F14/18—Monomers containing fluorine
    • C08F14/26—Tetrafluoroethene
    • 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
    • C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
    • C08F214/18—Monomers containing fluorine
    • 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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/02—Neutralisation of the polymerisation mass, e.g. killing the catalyst also removal of catalyst residues

Definitions

  • the iron becomes insoluble. Eventually the iron particles will float to the surface of the dispersion and appear as a yellow or red oil floating on the surface. This can take several days or weeks. As little as 0.2 ppm of iron can cause visible red scum in dispersion and such scum is an aesthetic problem only, not affecting any of the functional properties of the dispersion. Nonetheless, it has been the practice of the industry to eliminate the scum.
  • the present invention is a process for both reducing the fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion containing ferric ions and reducing the formation of red scum.
  • the process includes contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with strong base anion exchange resin to reduce fluorosurfactant content to a predetermined level wherein the anion exchange resin is in the hydroxide form, separating the dispersion from the anion exchange resin, and adding an effective amount of chelating agent having an equilibrium constant when complexed with iron of at least 10 18 prior to the contacting with the anion exchange resin for complexing ferric ions to prevent scum formation i.e., the formation insoluble ferric hydroxide.
  • Fluoropolymer dispersion so processed will contain some amount of ferric ions either from the metal equipment used in polymerization and processing or from the addition of iron compounds such as catalysts etc. or due to their presence in the water itself.
  • an effective amount of suitable chelating agent as described above is added to stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion prior to contacting the fluorosurfactant-containing aqueous fluoropolymer dispersion with anion exchange resin in the hydroxide form.
  • a strongly bonded iron complex is formed. Scum formation is prevented and the fluorosurfactant is removed by being strongly absorbed on the ion exchanger resin.
  • the stabilized dispersion typically contains 1 - 5 % nonionic exchange resin.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
PCT/US2005/046268 2004-12-22 2005-12-19 Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation Ceased WO2006069109A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05854908A EP1828260B1 (en) 2004-12-22 2005-12-19 Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation
DE602005024300T DE602005024300D1 (de) 2004-12-22 2005-12-19 Verfahren zur entfernung von fluortensid aus wässrigen fluorpolymerdispersionen und reduzierung der schlammbildung
CN2005800441817A CN101087814B (zh) 2004-12-22 2005-12-19 从含氟聚合物水分散体中去除含氟表面活性剂和减少浮渣形成的方法
JP2007548406A JP5017123B2 (ja) 2004-12-22 2005-12-19 水性フルオロポリマー分散液からフッ素系界面活性剤を除去し、かつスカムの形成を低減させる方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63829604P 2004-12-22 2004-12-22
US60/638,296 2004-12-22

Publications (1)

Publication Number Publication Date
WO2006069109A1 true WO2006069109A1 (en) 2006-06-29

Family

ID=36177889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/046268 Ceased WO2006069109A1 (en) 2004-12-22 2005-12-19 Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation

Country Status (6)

Country Link
US (1) US7619018B2 (enExample)
EP (1) EP1828260B1 (enExample)
JP (1) JP5017123B2 (enExample)
CN (1) CN101087814B (enExample)
DE (1) DE602005024300D1 (enExample)
WO (1) WO2006069109A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619018B2 (en) * 2004-12-22 2009-11-17 E.I. Du Pont De Nemours And Company Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation
US9080035B2 (en) 2011-03-31 2015-07-14 Daikin Industries, Ltd. Aqueous fluoropolymer dispersion

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060178472A1 (en) * 2005-02-10 2006-08-10 Johnson David W Process for producing low fluorosurfactant-containing aqueous fluoropolymer dispersions with controlled pH
US7671111B2 (en) * 2005-02-10 2010-03-02 E.I. Du Pont De Nemours And Company Monitoring column breakthrough in a process for removing fluorosurfactant from aqueous fluoropolymer dispersions
US20070282044A1 (en) * 2006-05-31 2007-12-06 Robert John Cavanaugh Concentrated fluoropolymer dispersions stabilized with anionic polyelectrolyte dispersing agents
RU2453529C2 (ru) * 2006-08-31 2012-06-20 Асахи Гласс Компани, Лимитед Соль перфторкарбоновой кислоты и способ ее получения
JP6269671B2 (ja) * 2013-07-18 2018-01-31 旭硝子株式会社 含フッ素重合体水性分散液の製造方法、含フッ素重合体水性分散液および含フッ素重合体
CN104119544B (zh) * 2014-07-10 2016-05-18 中昊晨光化工研究院有限公司 聚全氟乙丙烯浓缩分散液的制备方法
CN111138570B (zh) * 2018-11-05 2021-10-19 中昊晨光化工研究院有限公司 一种含氟分散浓缩液浮渣的处理方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055286A (en) * 1987-12-11 1991-10-08 Tokai Denka Kogyo Kabushiki Kaisha Process for preparing high purity hydrogen peroxide
US6365684B1 (en) * 1995-11-06 2002-04-02 Alliedsignal Inc. Method of manufacturing fluoropolymers
EP1335007A1 (en) * 2002-02-12 2003-08-13 Atofina Chemicals, Inc. Cross-linkable aqueous fluoropolymer based dispersions containing silanes
US20040132927A1 (en) * 2000-06-01 2004-07-08 3M Innovative Properties Company High purity fluoropolymers
US6833403B1 (en) * 1998-12-11 2004-12-21 3M Innovative Properties Company Aqueous dispersions of fluoropolymers

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559752A (en) 1951-03-06 1951-07-10 Du Pont Aqueous colloidal dispersions of polymers
US3488288A (en) * 1968-03-04 1970-01-06 Peter Strong & Co Inc Denture cleansers
US3882153A (en) 1969-09-12 1975-05-06 Kureha Chemical Ind Co Ltd Method for recovering fluorinated carboxylic acid
US3704272A (en) 1970-09-15 1972-11-28 Du Pont Concentration of polytetrafluoroethylene aqueous dispersion
DE2903981A1 (de) 1979-02-02 1980-08-07 Hoechst Ag Rueckgewinnung fluorierter emulgatorsaeuren aus basischen anionenaustauschern
JP3346090B2 (ja) 1995-03-31 2002-11-18 ダイキン工業株式会社 ポリテトラフルオロエチレン水性分散液組成物及びその用途
DE19933696A1 (de) * 1999-07-17 2001-01-18 Dyneon Gmbh Verfahren zur Rückgewinnung fluorierter Emulgatoren aus wässrigen Phasen
US7168617B2 (en) * 2000-06-07 2007-01-30 Walker Digital, Llc Game presentation in a retail establishment
US6720437B2 (en) * 2001-02-07 2004-04-13 E. I. Du Pont De Nemours And Company Fluorinated carboxylic acid recovery and reuse
US20030125421A1 (en) * 2001-08-03 2003-07-03 Hermann Bladel Aqueous dispersions of fluoropolymers
US7279522B2 (en) 2001-09-05 2007-10-09 3M Innovative Properties Company Fluoropolymer dispersions containing no or little low molecular weight fluorinated surfactant
US6956078B2 (en) 2002-01-04 2005-10-18 E.I. Du Pont De Nemours And Company Concentrated fluoropolymer dispersions
ATE338073T1 (de) * 2002-05-22 2006-09-15 3M Innovative Properties Co Prozess zur reduzierung des gehaltes an fluorierten emulgatoren in wässrigen fluorpolymer-dispersionen
EP1441014A1 (en) 2003-01-22 2004-07-28 3M Innovative Properties Company Aqueous fluoropolymer dispersion comprising a melt processible fluoropolymer and having a reduced amount of fluorinated surfactant
EP1452571B1 (en) 2003-02-28 2005-08-17 3M Innovative Properties Company Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant
US7619018B2 (en) * 2004-12-22 2009-11-17 E.I. Du Pont De Nemours And Company Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5055286A (en) * 1987-12-11 1991-10-08 Tokai Denka Kogyo Kabushiki Kaisha Process for preparing high purity hydrogen peroxide
US6365684B1 (en) * 1995-11-06 2002-04-02 Alliedsignal Inc. Method of manufacturing fluoropolymers
US6833403B1 (en) * 1998-12-11 2004-12-21 3M Innovative Properties Company Aqueous dispersions of fluoropolymers
US20040132927A1 (en) * 2000-06-01 2004-07-08 3M Innovative Properties Company High purity fluoropolymers
EP1335007A1 (en) * 2002-02-12 2003-08-13 Atofina Chemicals, Inc. Cross-linkable aqueous fluoropolymer based dispersions containing silanes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7619018B2 (en) * 2004-12-22 2009-11-17 E.I. Du Pont De Nemours And Company Process for removing fluorosurfactant from aqueous fluoropolymer dispersions and reducing scum formation
US9080035B2 (en) 2011-03-31 2015-07-14 Daikin Industries, Ltd. Aqueous fluoropolymer dispersion

Also Published As

Publication number Publication date
US20060135680A1 (en) 2006-06-22
EP1828260B1 (en) 2010-10-20
JP5017123B2 (ja) 2012-09-05
CN101087814A (zh) 2007-12-12
EP1828260A1 (en) 2007-09-05
DE602005024300D1 (de) 2010-12-02
JP2008525592A (ja) 2008-07-17
US7619018B2 (en) 2009-11-17
CN101087814B (zh) 2010-09-08

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