GB1100388A - Polytetrafluoroethylene powder and method of preparation thereof - Google Patents

Polytetrafluoroethylene powder and method of preparation thereof

Info

Publication number
GB1100388A
GB1100388A GB2079665A GB2079665A GB1100388A GB 1100388 A GB1100388 A GB 1100388A GB 2079665 A GB2079665 A GB 2079665A GB 2079665 A GB2079665 A GB 2079665A GB 1100388 A GB1100388 A GB 1100388A
Authority
GB
United Kingdom
Prior art keywords
powders
polytetrafluoroethylene
glass
free
flowing
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.)
Expired
Application number
GB2079665A
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo Co Ltd
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 Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Publication of GB1100388A publication Critical patent/GB1100388A/en
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
    • C08J3/124—Treatment for improving the free-flowing characteristics
    • 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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Free-flowing polytetraethylene powders comprising a major proportion by weight of aggregated particles which have a relatively smooth exterior with substantially no fluffy projections, which powders have an angle of repose of not more than 45 degrees and an average particle diameter of 100 to 5000 microns, may be prepared by agitating a mixture of polytetrafluoroethylene particles having an average diameter of less than 300 microns and an organic liquid capable of wetting polytetrafluoroethylene, having at atmospheric pressure a boiling-point between 0 DEG and 200 DEG C. and simultaneously heating the mixture to a temperature of at least 30 DEG C. until a free-flowing powder is obtained. The polytetrafluoroethylene may be mixed with filler particles, e.g. of glass, molybdenum disulphide or graphite, and mixing may be effected by tumbling. Specified liquids are hydrocarbons, alcohols, acyclic and heterocyclic ethers, ketones, aldehydes and halogen compounds. Water may also be present. In examples polytetrafluoroethylene powders are agitated in the presence of carbon tetrachloride, trichloroethylene, trichlorotrifluoroethane and acetone, with and without water, and glass, fibrous glass, graphite and molybdenum disulphide powders, to give free-flowing powders suitable for moulding.
GB2079665A 1964-05-18 1965-05-17 Polytetrafluoroethylene powder and method of preparation thereof Expired GB1100388A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2764464 1964-05-18
JP3500864 1964-06-20
JP3500764 1964-06-20

Publications (1)

Publication Number Publication Date
GB1100388A true GB1100388A (en) 1968-01-24

Family

ID=27285888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2079665A Expired GB1100388A (en) 1964-05-18 1965-05-17 Polytetrafluoroethylene powder and method of preparation thereof

Country Status (3)

Country Link
DE (1) DE1604349B2 (en)
FR (1) FR1450542A (en)
GB (1) GB1100388A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532782A (en) * 1965-12-30 1970-10-06 Hoechst Ag Polytetrafluoroethylene granular powder and process for its manufacture
DE2338285A1 (en) * 1972-07-29 1974-02-14 Daikin Ind Ltd GRAINY POLYTETRAFLUORAETHYLENE POWDER
USB324503I5 (en) * 1973-01-17 1975-01-28
US4241137A (en) 1977-11-22 1980-12-23 Daikin Kogyo Co., Ltd. Process for preparing polytetrafluoroethylene granular powder
EP0033354A1 (en) * 1980-02-05 1981-08-12 Asahi Glass Company Ltd. Process for producing fluorinated polymer ion-exchange membranes
DE3500061A1 (en) * 1985-01-03 1986-07-10 Norton Pampus GmbH, 4156 Willich METHOD FOR PRODUCING A MATERIAL
US4914158A (en) * 1986-04-11 1990-04-03 Daikin Industries, Ltd. Granular powder of melt processable fluorine-containing resin and preparation of the same
EP0455210A1 (en) * 1990-05-01 1991-11-06 Daikin Industries, Limited Process for preparing polytetrafluoroethylene granular powder
US5118788A (en) * 1990-05-14 1992-06-02 Daikin Industries Ltd. Process for preparing polytetrafluoroethylene powder
WO1996020241A2 (en) * 1994-12-21 1996-07-04 Ici Americas Inc. Method for the production of free-flowing tetrafluoroethylene polymer molding powders
US5833149A (en) * 1996-03-05 1998-11-10 Du Pont Mitsui Fluorochemicals Method for the granulation of polytetrafluoroethylene powder
EP0930328A1 (en) * 1997-07-24 1999-07-21 Asahi Glass Company Ltd. Process for producing granulated polytetrafluoroethylene powder
EP0937738A2 (en) * 1998-02-24 1999-08-25 DuPont-Mitsui Fluorochemicals Co., Ltd. Method for producing a polytetrafluoroethylene granulated powder

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532782A (en) * 1965-12-30 1970-10-06 Hoechst Ag Polytetrafluoroethylene granular powder and process for its manufacture
DE2338285A1 (en) * 1972-07-29 1974-02-14 Daikin Ind Ltd GRAINY POLYTETRAFLUORAETHYLENE POWDER
USB324503I5 (en) * 1973-01-17 1975-01-28
US3928524A (en) * 1973-01-17 1975-12-23 Du Pont Process for reducing electrostatic charge on polytetrafluoroethylene agglomerates
US4241137A (en) 1977-11-22 1980-12-23 Daikin Kogyo Co., Ltd. Process for preparing polytetrafluoroethylene granular powder
EP0033354A1 (en) * 1980-02-05 1981-08-12 Asahi Glass Company Ltd. Process for producing fluorinated polymer ion-exchange membranes
DE3500061A1 (en) * 1985-01-03 1986-07-10 Norton Pampus GmbH, 4156 Willich METHOD FOR PRODUCING A MATERIAL
US4914158A (en) * 1986-04-11 1990-04-03 Daikin Industries, Ltd. Granular powder of melt processable fluorine-containing resin and preparation of the same
EP0455210A1 (en) * 1990-05-01 1991-11-06 Daikin Industries, Limited Process for preparing polytetrafluoroethylene granular powder
US5189143A (en) * 1990-05-01 1993-02-23 Daikin Industries, Ltd. Process for preparing polytetrafluoroethylene granular power
US5118788A (en) * 1990-05-14 1992-06-02 Daikin Industries Ltd. Process for preparing polytetrafluoroethylene powder
WO1996020241A2 (en) * 1994-12-21 1996-07-04 Ici Americas Inc. Method for the production of free-flowing tetrafluoroethylene polymer molding powders
WO1996020241A3 (en) * 1994-12-21 1996-09-06 Ici America Inc Method for the production of free-flowing tetrafluoroethylene polymer molding powders
US5833149A (en) * 1996-03-05 1998-11-10 Du Pont Mitsui Fluorochemicals Method for the granulation of polytetrafluoroethylene powder
EP0930328A1 (en) * 1997-07-24 1999-07-21 Asahi Glass Company Ltd. Process for producing granulated polytetrafluoroethylene powder
EP0930328A4 (en) * 1997-07-24 2000-01-26 Asahi Glass Co Ltd Process for producing granulated polytetrafluoroethylene powder
US6203733B1 (en) 1997-07-24 2001-03-20 Asahi Glass Company Ltd. Process for producing granulated polytetrafluoroethylene powder
EP0937738A2 (en) * 1998-02-24 1999-08-25 DuPont-Mitsui Fluorochemicals Co., Ltd. Method for producing a polytetrafluoroethylene granulated powder
EP0937738A3 (en) * 1998-02-24 2000-01-26 DuPont-Mitsui Fluorochemicals Co., Ltd. Method for producing a polytetrafluoroethylene granulated powder

Also Published As

Publication number Publication date
DE1604349A1 (en) 1970-02-05
DE1604349B2 (en) 1973-02-22
FR1450542A (en) 1966-08-26

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