FR2404015A1 - Procede perfectionne de preparation de particules agglomerees de polymere granulaire et tetrafluoroethylene - Google Patents

Procede perfectionne de preparation de particules agglomerees de polymere granulaire et tetrafluoroethylene

Info

Publication number
FR2404015A1
FR2404015A1 FR7826941A FR7826941A FR2404015A1 FR 2404015 A1 FR2404015 A1 FR 2404015A1 FR 7826941 A FR7826941 A FR 7826941A FR 7826941 A FR7826941 A FR 7826941A FR 2404015 A1 FR2404015 A1 FR 2404015A1
Authority
FR
France
Prior art keywords
tetrafluoroethylene
preparation
agglomerated particles
granular polymer
perfected process
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.)
Granted
Application number
FR7826941A
Other languages
English (en)
Other versions
FR2404015B1 (fr
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
Publication of FR2404015A1 publication Critical patent/FR2404015A1/fr
Application granted granted Critical
Publication of FR2404015B1 publication Critical patent/FR2404015B1/fr
Expired legal-status Critical Current

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
    • C08J3/12—Powdering or granulating
    • 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
    • C08J2327/00—Characterised by the use of homopolymers or 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; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or 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; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or 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; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention se rapporte aux matériaux polymères. Elle concerne un procédé de traitement des agglomérats trop grossiers produits pendant l'agglomération (en 1) de petites particules de polymère granulaire de tétrafluoroéthyle, selon lequel on agite, dans des conditions appropriées, ces agglomérats trop grossiers avec de l'eau, par exemple dans une pompe 18, afin de les subdiviser en agglomérats d'une grosseur réduite. Utilisation par les producteurs de polymère granulaires de tétrafluoroéthylène.
FR7826941A 1977-09-21 1978-09-20 Procede perfectionne de preparation de particules agglomerees de polymere granulaire et tetrafluoroethylene Expired FR2404015B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/835,806 US4123606A (en) 1977-09-21 1977-09-21 Deagglomeration process

Publications (2)

Publication Number Publication Date
FR2404015A1 true FR2404015A1 (fr) 1979-04-20
FR2404015B1 FR2404015B1 (fr) 1985-07-12

Family

ID=25270513

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826941A Expired FR2404015B1 (fr) 1977-09-21 1978-09-20 Procede perfectionne de preparation de particules agglomerees de polymere granulaire et tetrafluoroethylene

Country Status (7)

Country Link
US (1) US4123606A (fr)
JP (1) JPS5454156A (fr)
DE (1) DE2841149C3 (fr)
FR (1) FR2404015B1 (fr)
GB (1) GB2004896B (fr)
IT (1) IT1202776B (fr)
NL (1) NL190287C (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241137A (en) * 1977-11-22 1980-12-23 Daikin Kogyo Co., Ltd. Process for preparing polytetrafluoroethylene granular powder
JPS5618624A (en) * 1979-07-24 1981-02-21 Daikin Ind Ltd Production of filled polytetrafluoroethylene fine powder
NL8003949A (nl) * 1980-07-09 1982-02-01 Electrochem Energieconversie Werkwijze voor de vervaardiging van een laag van een elektrode voor een cel, in het bijzonder voor een brandstofcel.
DE3135598A1 (de) * 1981-09-09 1983-03-17 Hoechst Ag, 6000 Frankfurt "kontinuierliches verfahren zur agglomerierung von ptee-pulvern im fluessigen medium und damit gewonnenes modifiziertes ptee-pulver"
JPS63159438A (ja) * 1986-12-22 1988-07-02 Daikin Ind Ltd テトラフルオロエチレン系共重合体粉末の製法
JPH03259926A (ja) * 1990-03-08 1991-11-20 Daikin Ind Ltd ポリテトラフルオロエチレン粒状粉末の製法
JP3000609B2 (ja) * 1990-03-08 2000-01-17 ダイキン工業株式会社 ポリテトラフルオロエチレン粒状粉末の製法
US5977295A (en) * 1990-03-12 1999-11-02 Daikin Industries, Ltd Continuous process for preparing polytetrafluoroethylene wet powder
US5709944A (en) * 1992-02-05 1998-01-20 Daikin Industries, Ltd. Polytetrafluoroethylene molding powder
JP3177983B2 (ja) * 1992-02-05 2001-06-18 ダイキン工業株式会社 ポリテトラフルオロエチレン成形用粉末
JPH0743775U (ja) * 1993-07-26 1995-09-12 株式会社ヨネイ 皺付き片面自己粘着性防音及び防振材
JPH0952955A (ja) * 1995-08-11 1997-02-25 Daikin Ind Ltd 変性ポリテトラフルオロエチレン粒状粉末の製法
DE19547909A1 (de) * 1995-12-21 1997-06-26 Dyneon Gmbh Verfahren zur Nachbehandlung von thermoplastischen Fluorpolymeren
JP4559227B2 (ja) 2002-10-09 2010-10-06 ノボザイムス アクティーゼルスカブ 粒子組成物を改良する方法
US20040130968A1 (en) * 2002-10-09 2004-07-08 Novozymes A/S Method for improving particle compositions
PL1998948T3 (pl) * 2006-03-22 2011-04-29 Basf Se Sposób i urządzenie do granulacji stopów polimerowych zawierających porofor
US20140162916A1 (en) * 2011-05-13 2014-06-12 E I Du Pont De Nemours And Company Slurry technique for producing fluoropolymer composites

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766133A (en) * 1963-09-09 1973-10-16 Du Pont Polytetrafluoroethylene filled and unfilled molding powders and theirpreparation
GB1428838A (en) * 1972-07-29 1976-03-17 Daikin Ind Ltd Polytetrafluoroethylene granular powder and process for preparing the same
FR2307007A1 (fr) * 1975-04-11 1976-11-05 Du Pont Procede pour reduire la perte de charge durant l'agglomeration de polytetrafluoroethylene

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087921A (en) * 1958-09-02 1963-04-30 Du Pont Polytetrafluoroethylene molding powder
US3115486A (en) * 1960-11-30 1963-12-24 Du Pont Process for the preparation of polytetrafluoroethylene molding powder
US3366615A (en) * 1964-09-16 1968-01-30 Allied Chem Method for agglomerating granular polytetrafluoroethylene
US3527857A (en) * 1965-10-26 1970-09-08 Hoechst Ag Process for preparing polytetrafluoroethylene-containing powder
US3781258A (en) * 1968-09-11 1973-12-25 Daikin Ind Ltd Polytetrafluoroethylene powder and method of preparation thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766133A (en) * 1963-09-09 1973-10-16 Du Pont Polytetrafluoroethylene filled and unfilled molding powders and theirpreparation
GB1428838A (en) * 1972-07-29 1976-03-17 Daikin Ind Ltd Polytetrafluoroethylene granular powder and process for preparing the same
FR2307007A1 (fr) * 1975-04-11 1976-11-05 Du Pont Procede pour reduire la perte de charge durant l'agglomeration de polytetrafluoroethylene

Also Published As

Publication number Publication date
NL190287B (nl) 1993-08-02
IT7827899A0 (it) 1978-09-20
IT1202776B (it) 1989-02-09
NL7809580A (nl) 1979-03-23
US4123606A (en) 1978-10-31
DE2841149A1 (de) 1979-03-29
JPH0160049B2 (fr) 1989-12-20
DE2841149C2 (de) 1987-03-19
DE2841149C3 (de) 1993-12-02
FR2404015B1 (fr) 1985-07-12
NL190287C (nl) 1994-01-03
JPS5454156A (en) 1979-04-28
GB2004896A (en) 1979-04-11
GB2004896B (en) 1982-03-10

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