GB1161023A - Process for Polymerizing Tetrafluoroethylene - Google Patents

Process for Polymerizing Tetrafluoroethylene

Info

Publication number
GB1161023A
GB1161023A GB2722367A GB2722367A GB1161023A GB 1161023 A GB1161023 A GB 1161023A GB 2722367 A GB2722367 A GB 2722367A GB 2722367 A GB2722367 A GB 2722367A GB 1161023 A GB1161023 A GB 1161023A
Authority
GB
United Kingdom
Prior art keywords
polymerization
range
tetrafluoroethylene
june
aqueous medium
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
GB2722367A
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 GB1161023A publication Critical patent/GB1161023A/en
Expired legal-status Critical Current

Links

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
    • 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

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)

Abstract

1,161,023. Polymerization of tetrafluoroethylene. DAIKIN KOGYO CO. Ltd. 13 June, 1967 [15 June, 1966], No. 27223/67. Heading C3P. Tetrafluoroethylene is polymerized at a temperature of 0‹ to 40‹ C. and a pressure of 0 to 30 atmospheres in an aqueous medium containing an inorganic polymerization initiator system and having a pH within the range of 5À0 to 10À0 while adding a buffer agent in an amount necessary to maintain the aqueous medium at a given pH within the range during the polymerization. Using an initiator system comprising an inorganic peroxide crude polytetrafluoroethylene particles may be prepared which when pulverized give a non-fibrous granular powder having a wet-sieve size of not greater than 40 microns, a shape factor of not more than 15, an anisotropic expansion coefficient within the range of 1À02 to 1À26 and a surface smoothness of at least 15 seconds. In the examples were used; KH 2 PO 4 , Na 2 HPO 4 , Na 2 B 4 O 7 , (NH 4 ) 2 S 2 O 8 , NaHSO 3 and FeSO 4 .
GB2722367A 1966-06-15 1967-06-13 Process for Polymerizing Tetrafluoroethylene Expired GB1161023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3821766 1966-06-15

Publications (1)

Publication Number Publication Date
GB1161023A true GB1161023A (en) 1969-08-13

Family

ID=12519127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2722367A Expired GB1161023A (en) 1966-06-15 1967-06-13 Process for Polymerizing Tetrafluoroethylene

Country Status (2)

Country Link
DE (1) DE1720479A1 (en)
GB (1) GB1161023A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048308A1 (en) * 1980-09-19 1982-03-31 Asahi Glass Company Ltd. Process for producing propylene-tetrafluoroethylene copolymer
US5153285A (en) * 1990-07-13 1992-10-06 Hoechst Aktiengesellschaft Process for the preparation of tetrafluoroethylene polymer in aqueous suspension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048308A1 (en) * 1980-09-19 1982-03-31 Asahi Glass Company Ltd. Process for producing propylene-tetrafluoroethylene copolymer
US5153285A (en) * 1990-07-13 1992-10-06 Hoechst Aktiengesellschaft Process for the preparation of tetrafluoroethylene polymer in aqueous suspension

Also Published As

Publication number Publication date
DE1720479A1 (en) 1972-03-23

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Legal Events

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