GB1299520A - Tetrafluoroethylene polymers - Google Patents

Tetrafluoroethylene polymers

Info

Publication number
GB1299520A
GB1299520A GB1552970A GB1552970A GB1299520A GB 1299520 A GB1299520 A GB 1299520A GB 1552970 A GB1552970 A GB 1552970A GB 1552970 A GB1552970 A GB 1552970A GB 1299520 A GB1299520 A GB 1299520A
Authority
GB
United Kingdom
Prior art keywords
weight
water
dispersion
tetrafluoroethylene
formula
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
GB1552970A
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 GB1299520A publication Critical patent/GB1299520A/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

Abstract

1299520 Tetrafluoroethylene polymer dispersions E I DU PONT DE NEMOURS & CO 1 April 1970 [1 April 1969] 15529/70 Heading C3P A dispersion in water of a tetrafluoroethylene polymer containing at least 98% by weight of units derived from tetrafluoroethylene is prepared by heating gaseous tetrafluoroethylene or a mixture of tetrafluoroethylene and a monomer copolymerizable therewith under a pressure of 50 to 700 p.s.i.g. at a temperature of 50‹ to 125‹ C. in the presence of water and an initiator for the polymerization of tetrafluoroethylene, until the resulting dispersion of polymer in water contains 20 to 50% by weight of solids, there being added to the polymer dispersion, before its solids content reaches 4% by weight, (a) 0À00002 to 0À002% by weight, based on the weight of water in the dispersion, of a hydrocarbon-based nucleating agent, which has the formula R-(C 6 H 4 ) k (OCH 2 CH 2 ) x OH (where R is a primary, secondary or tertiary alkyl group containing 1 to 20 carbon atoms, -C 6 H 4 - is a phenylene group, k is 0 or 1, and x is an integer from 4 to 50) and a 1% by weight solution of which in water, or a saturated solution of which in water if its solubility is less than 1% by weight, has a surface tension at 23‹ C. at least 30 dynes/cm. less than water at 23‹ C., and (b) 0À001 to 0À2% by weight, based on the weight of water in the dispersion, if a fluorocarbon-based nucleating agent which has the formula (where Y- is H-, Cl- or F-; R f is where n is an integer of from 5 to 10; Z is and M is an alkali metal ion, ammonium ion or an ammonium ion substituted by alkyl or 1 to 4 carbon atoms) or of the formula (where R<SP>1</SP> f is a perfluoroalkyl group containing 1 to 5 carbon atoms; -R<SP>11</SP> f is -F or -CF 3 ; m is 0 or an integer from 1 to 10; and M and Z are as defined above) and a 1% by weight solution of which in water, or a saturated solution of which in water if its solubility is less than 1% by weight, has a surface tension at 23‹ C. at least 20 dynes/em. less than water at 23‹ C., and there being added to the dispersion (c) 0À4 to 2À5% by weight, based on the weight of water in the dispersion, of chlorendic acid, the addition of chlorendic acid commencing when the solids content of the dispersion is between 4% and 10% by weight. In the examples tetrafluoroethylene and hexafluoropropylene are polymerized in the presence of water, paraffin wax, ammonium perfluorocaprylate, disuccinic acid peroxide, a surfactant of formula (x =9-10), chlorendic acid, ammonium #- hydrohexadecafluorononanoate, a surfactant of formula (x = 10, y = 12 and z = 5), (x = 7), C 8 H 17 SO 3 K and reduced iron powder.
GB1552970A 1969-04-01 1970-04-01 Tetrafluoroethylene polymers Expired GB1299520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81229469A 1969-04-01 1969-04-01

Publications (1)

Publication Number Publication Date
GB1299520A true GB1299520A (en) 1972-12-13

Family

ID=25209136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1552970A Expired GB1299520A (en) 1969-04-01 1970-04-01 Tetrafluoroethylene polymers

Country Status (4)

Country Link
DE (1) DE2015279A1 (en)
FR (1) FR2042250A5 (en)
GB (1) GB1299520A (en)
NL (1) NL7004639A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314925A (en) * 1992-12-03 1994-05-24 General Electric Company Use of polytetrafluoroethylene resins as a nucleating agent for foam molded thermoplastics
US8563670B2 (en) 2010-11-09 2013-10-22 E I Du Pont De Nemours And Company Nucleation in aqueous polymerization of fluoromonomer
US20130303716A1 (en) * 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Drying Wet Fluoropolymer Resin and Exposing to Oxygen Source to Reduce Discoloration
WO2013169568A1 (en) * 2012-05-09 2013-11-14 E. I. Du Pont De Nemours And Company Fluoropolymer dispersion treatment employing high ph and oxygen source to reduce fluoropolymer resin discoloration
US8785516B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Fluoropolymer dispersion treatment employing ultraviolet light and oxygen source to reduce fluoropolymer resin discoloration
US8785560B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Employing pretreatment and fluorination of fluoropolymer resin to reduce discoloration
US9074025B2 (en) 2010-11-09 2015-07-07 The Chemours Company Fc, Llc Reducing the telogenic behavior of hydrocarbon-containing surfactants in aqueous dispersion fluoromonomer polymerization
US9175110B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing melt extrusion and exposure to oxygen source to reduce discoloration
US9175115B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing heating and oxygen source to reduce discoloration
US9255164B2 (en) 2010-11-09 2016-02-09 The Chemours Company Fc, Llc Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
US9574027B2 (en) 2013-03-11 2017-02-21 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing sorbent to reduce fluoropolymer resin discoloration
US9676929B2 (en) 2013-11-26 2017-06-13 The Chemours Company Fc, Llc Employing polyalkylene oxides for nucleation in aqueous polymerization of fluoromonomer

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314925A (en) * 1992-12-03 1994-05-24 General Electric Company Use of polytetrafluoroethylene resins as a nucleating agent for foam molded thermoplastics
US9255164B2 (en) 2010-11-09 2016-02-09 The Chemours Company Fc, Llc Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
US8563670B2 (en) 2010-11-09 2013-10-22 E I Du Pont De Nemours And Company Nucleation in aqueous polymerization of fluoromonomer
US11655312B2 (en) 2010-11-09 2023-05-23 The Chemours Company Fc, Llc Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
US10703829B2 (en) 2010-11-09 2020-07-07 The Chemours Company Fc, Llc Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
US9518170B2 (en) 2010-11-09 2016-12-13 The Chemours Company Fc, Llc Aqueous polymerization of perfluoromonomer using hydrocarbon surfactant
US9074025B2 (en) 2010-11-09 2015-07-07 The Chemours Company Fc, Llc Reducing the telogenic behavior of hydrocarbon-containing surfactants in aqueous dispersion fluoromonomer polymerization
US9371405B2 (en) 2010-11-09 2016-06-21 The Chemours Company Fc, Llc Nucleation in aqueous polymerization of fluoromonomer
US8785516B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Fluoropolymer dispersion treatment employing ultraviolet light and oxygen source to reduce fluoropolymer resin discoloration
US9175112B2 (en) * 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Drying wet fluoropolymer resin and exposing to oxygen source to reduce discoloration
US9175115B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing heating and oxygen source to reduce discoloration
US9175110B2 (en) 2012-05-09 2015-11-03 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing melt extrusion and exposure to oxygen source to reduce discoloration
US8785560B2 (en) 2012-05-09 2014-07-22 E I Du Pont De Nemours And Company Employing pretreatment and fluorination of fluoropolymer resin to reduce discoloration
WO2013169568A1 (en) * 2012-05-09 2013-11-14 E. I. Du Pont De Nemours And Company Fluoropolymer dispersion treatment employing high ph and oxygen source to reduce fluoropolymer resin discoloration
US20130303716A1 (en) * 2012-05-09 2013-11-14 E I Du Pont De Nemours And Company Drying Wet Fluoropolymer Resin and Exposing to Oxygen Source to Reduce Discoloration
US9574027B2 (en) 2013-03-11 2017-02-21 The Chemours Company Fc, Llc Fluoropolymer resin treatment employing sorbent to reduce fluoropolymer resin discoloration
US9676929B2 (en) 2013-11-26 2017-06-13 The Chemours Company Fc, Llc Employing polyalkylene oxides for nucleation in aqueous polymerization of fluoromonomer

Also Published As

Publication number Publication date
DE2015279A1 (en) 1970-10-08
NL7004639A (en) 1970-10-05
FR2042250A5 (en) 1971-02-05

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Legal Events

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