GB1199312A – Process for Polymerizing Tetrafluoroethylene in Continuous Manner
– Google Patents
GB1199312A – Process for Polymerizing Tetrafluoroethylene in Continuous Manner
– Google Patents
Process for Polymerizing Tetrafluoroethylene in Continuous Manner
Info
Publication number
GB1199312A
GB1199312A
GB3868967A
GB3868967A
GB1199312A
GB 1199312 A
GB1199312 A
GB 1199312A
GB 3868967 A
GB3868967 A
GB 3868967A
GB 3868967 A
GB3868967 A
GB 3868967A
GB 1199312 A
GB1199312 A
GB 1199312A
Authority
GB
United Kingdom
Prior art keywords
tetrafluoroethylene
polymer
vessel
water
polymerization
Prior art date
1967-08-22
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
GB3868967A
Inventor
Arthur Constantinos Doumas
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.)
Dow Chemical Co
Original Assignee
Dow Chemical 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.)
1967-08-22
Filing date
1967-08-22
Publication date
1970-07-22
1967-08-22
Application filed by Dow Chemical Co
filed
Critical
Dow Chemical Co
1967-08-22
Priority to GB3868967A
priority
Critical
patent/GB1199312A/en
1970-07-22
Publication of GB1199312A
publication
Critical
patent/GB1199312A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
C08F259/00—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00
C08F259/08—Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group C08F14/00 on to polymers 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
Abstract
1,199,312. Polymerizing tetrafluoroethylene. DOW CHEMICAL CO. 22 Aug., 1967, No. 38689/67. Headings C3G and C3P. Tetrafluoroethylene is polymerized by feeding monomeric tetrafluoroethylene to a polymerization vessel and into contact with particles of a finely divided solid polymer consisting of at least a predominant amount by weight of tetrafluoroethylene and not more than a minor amount by weight of another ethylenically unsaturated fluoro compound copolymerizable therewith, suspended in water; withdrawing a liquid body comprising the polymer suspended in water from the vessel and then passing it through a field of high energy ionizing radiation of an intensity of at least 40,000 rads per hour and subjecting the polymer therein to irradiation with a dose effective to initiate polymerization of tetrafluoroethylene upon contacting and interacting the monomer with irradiated polymer; feeding a first portion of the suspension of the irradiated polymer to a filtering means and separating the polymer from the water, the water being passed from there to the vessel while a second portion of the suspension of the irradiated polymer is recirculated to the vessel where it is contacted with tetrafluoroethylene, the process being continued while feeding the tetrafluoroethylene to the vessel at a rate not substantially greater than it is consumed in the polymerization reaction. The polymer separated from the water may be contacted with additional tetrafluoroethylene and polymerization allowed to proceed until the rate of polymerization becomes negligible. Suitable polymers are homopolymers of tetrafluoroethylene and copolymers with hexafluoropropylene. The monomer may be linked to increase the parent chain length and/or grafted.
GB3868967A
1967-08-22
1967-08-22
Process for Polymerizing Tetrafluoroethylene in Continuous Manner
Expired
GB1199312A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB3868967A
GB1199312A
(en)
1967-08-22
1967-08-22
Process for Polymerizing Tetrafluoroethylene in Continuous Manner
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3868967A
GB1199312A
(en)
1967-08-22
1967-08-22
Process for Polymerizing Tetrafluoroethylene in Continuous Manner
Publications (1)
Publication Number
Publication Date
GB1199312A
true
GB1199312A
(en)
1970-07-22
Family
ID=10405078
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3868967A
Expired
GB1199312A
(en)
1967-08-22
1967-08-22
Process for Polymerizing Tetrafluoroethylene in Continuous Manner
Country Status (1)
Country
Link
GB
(1)
GB1199312A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2318896A1
(en)
*
1975-07-24
1977-02-18
Inst Khim Fiz An Sssr
Regenerating spent PTFE powder – by ionising radiation induced graft block copolymerisation with fluorinated monomers
EP0253400A2
(en)
*
1986-07-18
1988-01-20
Yoneho Tabata
Process for producing low-molecular weight polytetrafluoroethylene fine powder by ionizing radiation
US5872157A
(en)
*
1996-01-30
1999-02-16
The University Of North Carolina At Chapel Hill
Method for olefin oxidation
1967
1967-08-22
GB
GB3868967A
patent/GB1199312A/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2318896A1
(en)
*
1975-07-24
1977-02-18
Inst Khim Fiz An Sssr
Regenerating spent PTFE powder – by ionising radiation induced graft block copolymerisation with fluorinated monomers
EP0253400A2
(en)
*
1986-07-18
1988-01-20
Yoneho Tabata
Process for producing low-molecular weight polytetrafluoroethylene fine powder by ionizing radiation
EP0253400A3
(en)
*
1986-07-18
1988-09-14
Yoneho Tabata
Process for producing low-molecular weight polytetrafluoroethylene fine powder by ionizing radiation
US5872157A
(en)
*
1996-01-30
1999-02-16
The University Of North Carolina At Chapel Hill
Method for olefin oxidation
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Legal Events
Date
Code
Title
Description
1970-12-02
PS
Patent sealed
1973-03-21
PLNP
Patent lapsed through nonpayment of renewal fees
