GB1344925A - Process for producing a shaped article of porous polytetra fluoroethylene - Google Patents

Process for producing a shaped article of porous polytetra fluoroethylene

Info

Publication number
GB1344925A
GB1344925A GB1221771A GB1221771A GB1344925A GB 1344925 A GB1344925 A GB 1344925A GB 1221771 A GB1221771 A GB 1221771A GB 1221771 A GB1221771 A GB 1221771A GB 1344925 A GB1344925 A GB 1344925A
Authority
GB
United Kingdom
Prior art keywords
thermoplastic resin
extraction
porous
shaped article
polymerized
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
GB1221771A
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.)
Kureha Corp
Original Assignee
Kureha Corp
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 Kureha Corp filed Critical Kureha Corp
Publication of GB1344925A publication Critical patent/GB1344925A/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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
    • 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)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

1344925 Moulding porous polytetrafluoroethylene articles KUREHA KAGAKU KOGYO KK 29 April 1971 [30 April 1970] 12217/71 Heading B5A [Also in Division C3] In a process for producing shaped articles of porous polytetrafluoroethylene, a polymerizable monomer, e.g. methyl methacrylate, vinyl chloride, styrene or vinylidene chloride which is capable of being polymerized to form a thermoplastic resin, is adsorbed or otherwise attached to particles of p.t.f.e. and then polymerized to form a polymeric mixture of thermoplastic resin and p.t.f.e.; the resulting mixture is kneaded at a temperature above the softening temperature of the thermoplastic resin to form a shaped article from which the thermoplastic resin is removed, e.g. by solvent extraction, thermal decomposition, chemical dissolution or chemical modification. In an example, a porous p.t.f.e. sheet is produced using polymethylmethacrylate as the thermoplastic resin, the resin being removed by extraction with tetrahydrofuran. In further examples, p.v.c. was removed by tetrahydrofuran extraction and polystyrene by heating at 300‹ C. The article produced is for example a filter, a gas diffusion membrane, an electrode or a partition membrane for use in electrolytic cells.
GB1221771A 1970-04-30 1971-04-29 Process for producing a shaped article of porous polytetra fluoroethylene Expired GB1344925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3628170A JPS4812177B1 (en) 1970-04-30 1970-04-30

Publications (1)

Publication Number Publication Date
GB1344925A true GB1344925A (en) 1974-01-23

Family

ID=12465384

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1221771A Expired GB1344925A (en) 1970-04-30 1971-04-29 Process for producing a shaped article of porous polytetra fluoroethylene

Country Status (3)

Country Link
JP (1) JPS4812177B1 (en)
DE (1) DE2120860A1 (en)
GB (1) GB1344925A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49124376U (en) * 1973-02-26 1974-10-24
JPS49147208U (en) * 1973-04-23 1974-12-19
JPS504938U (en) * 1973-05-16 1975-01-20
JPS5010602U (en) * 1973-05-31 1975-02-03
JPS5018606U (en) * 1973-06-21 1975-03-01
JPS50138301U (en) * 1974-04-27 1975-11-14
JPS51128803U (en) * 1975-03-25 1976-10-18
JPS5268582A (en) * 1975-12-02 1977-06-07 Nippon Koukan Kk Container for keeping food and drink in warm or cold state* and producing method thereof
JPS576404Y2 (en) * 1976-08-17 1982-02-06
JPS5339132U (en) * 1976-09-04 1978-04-05
JPH03120475U (en) * 1990-03-20 1991-12-11

Also Published As

Publication number Publication date
DE2120860A1 (en) 1972-04-06
JPS4812177B1 (en) 1973-04-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee