Bromine Or Iodine Containing Patents (Class 570/137)
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Patent number: 8791310Abstract: To provide a process for producing a fluoroalkyl iodide, whereby the selectivity for a fluoroalkyl iodide having a desired degree of polymerization is high and the productivity is high. A process for producing a fluoroalkyl iodide (2) represented by RfCF2CF2I (wherein Rf is a fluoroalkyl group having at most 4 carbon atoms), which comprises reacting a fluoroalkyl iodide (1) represented by RfI with tetrafluoroethylene in the presence of a radical initiator, wherein a first reaction step of supplying and reacting tetrafluoroethylene and a radical initiator to the fluoroalkyl iodide (1), is followed by repeating (n?1) times (provided that n is an integer of at least 3) a subsequent reaction step of supplying and reacting a radical initiator, or a radical initiator and tetrafluoroethylene, to a reaction mixture (1) formed in the first reaction step.Type: GrantFiled: December 4, 2012Date of Patent: July 29, 2014Assignee: Asahi Glass Company, LimitedInventors: Tetsuo Otsuka, Shoji Furuta
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Patent number: 8722945Abstract: A process for the preparation of a fluoroiodoalkane represented by the structural formula CF3(CF2)n—I, wherein n is 0 or 1. The process has the step of reacting a source of iodine with a compound represented by the structural formula CF3(CF2)n—Y, wherein Y is selected from H, Cl, Br and COOH and wherein n is 0 or 1. The reaction is carried out at a temperature from about 100° C. to about 750° C. and at a pressure from about 0.001 to about 100 atm for a contact time from about 0.001 second to about 300 hours in the presence a catalyst.Type: GrantFiled: November 4, 2008Date of Patent: May 13, 2014Assignee: Honeywell International Inc.Inventors: Shuwu Yang, Hsueh Sung Tung
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Patent number: 8575285Abstract: Provided is a catalyst used for a living radical polymerization method, which contains a central element consisting of carbon and at least one halogen atom binding to the central element. Further, a hydrocarbon compound can be used as a catalyst precursor. A monomer having a radical-reactive unsaturated bond is subjected to a radical polymerization reaction in the presence of the catalyst, consequently a polymer having narrow molecular weight distribution can be obtained, and thus the cost of the living radical polymerization can be remarkably reduced. The present invention is significantly more environmentally friendly and economically excellent than conventional living radical polymerization methods, due to advantages such as low toxicity of the catalyst, low amount of the catalyst used, high solubility of the catalyst, mild reaction conditions, and no coloration/no odor (no need of any post-treatments for a molded article), and the like.Type: GrantFiled: September 8, 2009Date of Patent: November 5, 2013Assignee: Kyoto UniversityInventors: Atsushi Goto, Yoshinobu Tsujii, Takeshi Fukuda
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Publication number: 20130165658Abstract: This invention is directed to a process for the preparation of high yield alkyl or aryl iodide from its corresponding carboxylic acid using N-iodo amides.Type: ApplicationFiled: June 9, 2011Publication date: June 27, 2013Inventors: Gennady Nisnevich, Mark Gandelman, Kseniya Kulbitski
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Patent number: 8212064Abstract: An oligomer of the formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]mG??(I) wherein G is an I; OH; OC(O)CH?CH2; OC(O)CCH3?CH2; OC(O)CCl?CH2; NR1H; N3; NCO; SQ wherein Q is H, alkyl, (CH2)nOH, (CH2)nNH2, (CH2)nOC(O)C(Me)=CH2, or (CH2)nNHC(O)C(Me)=CH2; SCN; COOH; SO3H; NHCOCH?CH2; NHCOC(CH3)?CH2); OC(O)NHCH2CH2OC(O)C(CH3)?CH2; or OC(O)NHCH2CH2OC(O)C(CH3)?CH2; subscript n is an integer from 1 to about 6, subscript x is an integer from 1 to about 6, subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof, the total number of carbons in said formula (I) excluding G ranges from about 8 to about 22, and a process for preparation thereof.Type: GrantFiled: May 14, 2008Date of Patent: July 3, 2012Assignee: E.I. du Pont de Nemours and CompanyInventors: Weiming Qiu, Anilkumar Raghavanpillai, Michael Francis Vincent
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Publication number: 20110313214Abstract: A subject of the invention is a compound of formula (I) XCFzR3-z in which: in which X represents a branched or linear unsaturated hydrocarbon radical having up to 5 carbon atoms, unsubstituted or substituted, R represents Cl, F, Br, I or H, Z is equal to 1, 2 or 3, and the bio-carbon content of which is at least 1%. A subject of the invention is also processes for the preparation of this compound.Type: ApplicationFiled: July 9, 2009Publication date: December 22, 2011Applicant: Arkema FranceInventor: Jean-Luc Dubois
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Publication number: 20110275775Abstract: Provided is a catalyst used for a living radical polymerization method, which contains a central element consisting of carbon and at least one halogen atom binding to the central element. Further, a hydrocarbon compound can be used as a catalyst precursor. A monomer having a radical-reactive unsaturated bond is subjected to a radical polymerization reaction in the presence of the catalyst, consequently a polymer having narrow molecular weight distribution can be obtained, and thus the cost of the living radical polymerization can be remarkably reduced. The present invention is significantly more environmentally friendly and economically excellent than conventional living radical polymerization methods, due to advantages such as low toxicity of the catalyst, low amount of the catalyst used, high solubility of the catalyst, mild reaction conditions, and no coloration/no odor (no need of any post-treatments for a molded article), and the like.Type: ApplicationFiled: September 8, 2009Publication date: November 10, 2011Applicant: Kyoto UniversityInventors: Atsushi Goto, Yoshinobu Tsujii, Takeshi Fukuda
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Patent number: 7842730Abstract: Medicine, in particular medications for treating blood losses, hypoxic and ishemic states, for improving a blood oxygen supply and for preserving isolated perfused organs and tissues. The inventive medical emulsion of perfluororganic compounds includes rapidly excretable perfluororganic compounds such as perfluordecalin, perfluoractilbromide, a perfluoroganic additive embodied in the form of a mixture of perfluorinated tertiary amines and phospholipids in the form of a water-salt dispersion. The perfluordecalin and perfluoractilbromide are contained in the composition of the rapidly excretable perfluororganic compounds at a ratio ranging from 10:1 to 1:10. The mixture of perfluorinated tertiary amines is embodied in the form of the mixture of perfluorotpripropylamine and the co-products thereof: cis- and trans-isomers perfluor-1-propyl 3,4-dimethylpirrolidone and perfluor-1-propyl-4-methhylpiperidine.Type: GrantFiled: February 7, 2005Date of Patent: November 30, 2010Inventors: Irina Nikolaievna Kuznetsova, Evgeny Ilich Maievsky
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Publication number: 20100197967Abstract: The invention concerns a process for purifying ?,?-diiodoperfluorinated compounds of formula 1-(CF2CF2Y)m—I comprising contacting an impure ?,?-diiodoperfluorinated compound with a suitable sequestering agent, with formation of a reversible adduct and separating the ?,?-diiodoperfluorinated compound from the adduct itself. Diammonium dihalogenids of the general formula [R1,2,3N—(CH2)n—NR4,5,6]2*2X (R1-6=alkyl C1-C6n=8-26, X?I, Br, Cl) also called ‘methonium compounds’ are the preferred sequestering agents.Type: ApplicationFiled: July 3, 2008Publication date: August 5, 2010Applicant: Politecnico di MilanoInventors: Pierangelo Metrangolo, Giuseppe Resnati, Yvan Carcenac
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Publication number: 20090287010Abstract: An oligomer of the formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]mG??(I) wherein G is an I; OH; OC(O)CH?CH2; OC(O)CCH3?CH2; OC(O)CCl?CH2; NR1H; N3; NCO; SQ wherein Q is H, alkyl, (CH2)nOH, (CH2)nNH2, (CH2)nOC(O)C(Me)?CH2, or (CH2)nNHC(O)C(Me)?CH2; SCN; COOH; SO3H; NHCOCH?CH2; NHCOC(CH3)?CH2); OC(O)NHCH2CH2OC(O)C(CH3)?CH2; or OC(O)NHCH2CH2OC(O)C(CH3)?CH2; subscript n is an integer from 1 to about 6, subscript x is an integer from 1 to about 6, subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof, the total number of carbons in said formula (I) excluding G ranges from about 8 to about 22, and a process for preparation thereof.Type: ApplicationFiled: May 14, 2008Publication date: November 19, 2009Applicant: E.I. du Pont de Nemours and CompanyInventors: Weiming Qiu, Anilkumar Raghavanpillai, Michael Francis Vincent
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Publication number: 20090137852Abstract: A process for the preparation of a fluoroiodoalkane represented by the structural formula CF3(CF2)n—I, wherein n is 0 or 1. The process has the step of reacting a source of iodine with a compound represented by the structural formula CF3(CF2)n—Y, wherein Y is selected from H, Cl, Br and COOH and wherein n is 0 or 1. The reaction is carried out at a temperature from about 100° C. to about 750° C. and at a pressure from about 0.001 to about 100 atm for a contact time from about 0.001 second to about 300 hours in the presence a catalyst.Type: ApplicationFiled: November 4, 2008Publication date: May 28, 2009Inventors: Shuwu Yang, Hsueh Sung Tung
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Patent number: 7501540Abstract: The present invention provides a process for producing compounds useful as raw materials for various fluororesins in high yields in few steps from inexpensive and readily available starting materials. The following compound (1) and the following compound (2) are reacted to form the following compound (3), then the compound (3) is fluorinated in a liquid phase to form the following compound (4), and the ester bonds in the compound (4) are dissociated to form the compound (5), or the compound (5) and the compound (6). HOCH2-Q-O—(CH2)3—OH??(1), CRBCOX??(2), RBCOOCH2-Q-O—(CH2)3—OCORB??(3), RBFCOOCF2-QF-O—(CF2)3—OCORBF??(4), FCO-QF-O—(CF2)2—COF??(5), RBFCOF??(6).Type: GrantFiled: June 29, 2007Date of Patent: March 10, 2009Assignee: Asahi Glass Company, LimitedInventors: Shu-zhong Wang, Takashi Okazoe, Eisuke Murotani, Kunio Watanabe, Daisuke Shirakawa, Kazuya Oharu
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Patent number: 6396680Abstract: A monolithic capacitor including a sintered body formed from a TiO2-containing reduction-resistant dielectric ceramic material; a plurality of internal electrodes which are formed inside the sintered body, the electrodes being formed of a base metal; and first and second external electrodes which are formed on the sintered body, the internal electrodes being electrically connected to the external electrodes; wherein the amount of Ti contained in a secondary phase of the sintered body is about 2 wt. % or less as TiO2. A process for producing the monolithic capacitor of the present invention is also disclosed.Type: GrantFiled: November 30, 2000Date of Patent: May 28, 2002Assignee: Murata Manufacturing Co., Ltd.Inventors: Toshiki Nishiyama, Takayuki Nishino, Yasunobu Yoneda
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Patent number: 6365676Abstract: The invention concerns a process for the reaction of a perfluoroalkyl iodide of the formula CF3(CF2)h—I, where h is an integer from 4 to 18, with a compound having a terminal olefinic group, which comprises conducting said reaction in an aqueous medium containing 5 to 40% by weight of a water-soluble solvent and in the presence of from 0.02 to 0.5 equivalents of dithionite ion, based on the perfluoroalkyl iodide, at a temperature of from 0 to 40° C. and at a pH greater than 7.0.Type: GrantFiled: October 16, 2000Date of Patent: April 2, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: John Jennings, Ted Deisenroth, Marlon Haniff
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Patent number: 6229058Abstract: The instant invention relates to producing fluorinated propanes and pentanes. More particularly it relates to producing perhalofluoropropanes and pentanes by reacting dihalodifluoromethanes with polyfluoroethylenes, notably tetrafluoroethylene (TFE) and chlorotrifluoroethylene (CTFE) while in the presence of an aluminum chlorofluoride catalyst.Type: GrantFiled: August 28, 1997Date of Patent: May 8, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Allen Capron Sievert, Mario Joseph Nappa
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Patent number: 6150565Abstract: A process is disclosed for making diiodofluorinated compounds of the formula ICF.sub.2 (A).sub.n I wherein n is an integer of at least 1 and each A is CXYCQZ wherein each X, Y, Q, and Z are each independently selected from the group consisting of H, F, Cl, R.sub.F and OR.sub.F, and R.sub.F is a perfluoroalkyl group or perfluorinated polyether group wherein one or more of the fluorines is optionally replaced by a substituent selected from the group consisting of chlorine, bromine, iodine, hydrogen, sulfonyl fluoride, nitrile, ester, acyl chloride and acyl fluoride. The process involves reacting an olefin of the formula CXY.dbd.CQZ with CF.sub.2 I.sub.2 at a temperature in the range of from about 120.degree. C. to 240.degree. C.Diiodofluorinated compounds of the formula ICF.sub.2 CH.sub.2 CHR.sub.F I are also disclosed.Type: GrantFiled: September 8, 1998Date of Patent: November 21, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Zhen-Yu Yang
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Patent number: 5763552Abstract: A partially-fluorinated surfactant having internal methylene groups and having the formula R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM wherein m is 1-3, R.sub.f is perfluoroalkyl or perfluoroalkoxy, containing 3-8 carbon atoms, R'.sub.f is linear or branched perfluoroalkylene containing 1-4 carbon atoms, and M is NH.sub.4, Li, Na, K, or H is useful in polymerization of fluorinated monomers. High molecular weight can be achieved in homopolymerization of tetrafluoroethylene.Type: GrantFiled: July 1, 1997Date of Patent: June 9, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Andrew E. Feiring, Ming-Hong Hung, Jose M. Rodriguez-Parada, Roger J. Zipfel
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Patent number: 5654473Abstract: Novel trifluoromethylated intermediates are provided which are useful in synthesizing trifluoromethylated organic compounds. Specifically, compounds of the formula CF.sub.3 CCl.dbd.CHCH.sub.2 X are provided, which compounds are versatile intermediates for the synthesis of a wide variety of trifluoromethylated organic compounds.Type: GrantFiled: March 16, 1995Date of Patent: August 5, 1997Assignee: AlliedSignal Inc.Inventor: Michael Van Der Puy
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Patent number: 5481046Abstract: Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a photochemically initiated reaction between liquified CTFE and either elemental iodine or the telogen ICF.sub.2 CFClI at temperatures below about 50.degree. C.Type: GrantFiled: July 5, 1994Date of Patent: January 2, 1996Assignee: Dow Corning CorporationInventors: Richard D. Chambers, Martin P. Greenhall, Antony P. Wright
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Patent number: 5446214Abstract: A cotelomer of --CH.sub.2 CF.sub.2 -- (VDF) units and CF.sub.2 CF(CF.sub.3)-- (HFP) units characterized in that the HEP units comprise at least 33% of all VDF and HFP units in the cotelomer combined. Also claimed is a process for preparing a cotelomer in the liquid state comprising reacting (A) a bromine geminal telogen having the general formula RC(R')Br.sub.2 wherein R and R' are selected from the group consisting of F and perfluorinated alkyl radicals having 1 to 8 carbon atoms; (B) 1,1-difluoroethene, and (C) hexafluoropropene, the molar ratio of said components (A):(B):(C) being x:1:1 to x:1:5, in which x is 1 to 5.Type: GrantFiled: October 27, 1994Date of Patent: August 29, 1995Assignee: Dow Corning CorporationInventors: Gerardo Caporiccio, Richard D. Chambers, Lee D. Proctor
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Patent number: 5354928Abstract: The invention relates to a process for the manufacture of 1,1,1,2-tetrafluorochloroethane and of pentafluoroethane.The process which consists of gas phase catalytic fluorination of at least one pentahaloethane of formula C.sub.2 HX.sub.2-n F.sub.3+n in which X denotes a chlorine or bromine atom and n the number 0 or 1, by hydrofluoric acid, is characterized in that a catalyst is employed consisting of a catalytic quantity of chromium in an oxidation state equal to or greater than 3 and of an activated charcoal as support.The selectivity for 1,1,1,2-tetrafluorochloroethane and pentafluoroethane reaches approximately 95% and even more.Type: GrantFiled: May 24, 1993Date of Patent: October 11, 1994Assignee: Societe AtochemInventors: Bernard Cheminal, Eric Lacroix, Andre Lantz
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Patent number: 5347058Abstract: Fluorinated olefins are produced by thermolysis of a silyl ester of a fluorinated aliphatic carboxylic acid in the presence of a catalyst which provides fluoride ion, such as potassium fluoride. The fluorinated olefins are useful as monomers and chemical intermediates.Type: GrantFiled: December 7, 1993Date of Patent: September 13, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: William B. Farnham
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Patent number: 5288932Abstract: The present invention relates to a method for the production of substituted or unsubstituted chloromethyl and bromomethyl cyclopropane having a degree of purity above 85%, particularly above 90%, by reacting a hydroxymethyl cyclopropane of the formula ##STR1## where R is H, or one or two R groups are alkyl of from 1 to 10 carbon atoms or phenyl, with methane sulfonic acid chloride or methane sulfonic acid bromide in the presence of a trialkylamine and, if necessary, an organic solvent, preferably an organic solvent containing oxygen, at a temperature of from -20.degree. C. to +30.degree. C. over a period of time of from 1 to 30 hours, then heating the reaction mixture to a temperature of from 40.degree. to 80.degree. C., or to reflux temperature, without isolating the intermediate mesylate.Type: GrantFiled: March 30, 1993Date of Patent: February 22, 1994Assignee: Huels AktiengesellschaftInventor: Manfred Kaufhold
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Patent number: 5196614Abstract: The present invention relates to a novel, catalyst-free method for preparing brominated telomers of chlorotrifluoroethylene. The process comprises reacting chlorotrifluoroethylene with a brominated telogen at a temperature in excess of 200.degree. C. for a time sufficient to produce the telomer.Type: GrantFiled: April 29, 1992Date of Patent: March 23, 1993Assignee: Dow Corning CorporationInventors: Gerardo Caporiccio, Gerald A. Gornowicz, Bernard Boutevin
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Patent number: 5105034Abstract: The present invention relates to new perfluoroalkyl halides and to their preparation by a process based on the thermodecomposition of perfluorocarbides in the presence of Cl.sub.2, Br.sub.2 and I.sub.2.Type: GrantFiled: May 29, 1990Date of Patent: April 14, 1992Assignee: Ausimont S.r.l.Inventors: Claudio Tonelli, Vito Tortelli
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Patent number: 5068415Abstract: The halogenotetrafluoropropionic acid 3-iodotetrafluoropropionic acid of the formula ICF.sub.2 CF.sub.2 COOH, it is prepared by reacting iodine, tetrafluoroethylene and ethylene in a one-pot reaction under specific conditions, reacting the resulting compound ICF.sub.2 CF.sub.2 CH.sub.2 CH.sub.2 I with a base in order to eliminate hydrogen iodide and oxidizing the compound ICF.sub.2 CF.sub.2 --CH.dbd.CH.sub.2 thus obtained to give 3-iodotetrafluoropropionic acid. The halogenotetrafluoropropionic acid is an advantageous starting compound for the preparation of valuable unsaturated compounds containing functional groups.Type: GrantFiled: September 4, 1987Date of Patent: November 26, 1991Assignee: Hoechst AktiengesellschaftInventors: Konrad von Werner, Anton Probst
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Patent number: 5068471Abstract: A process for continuous telomerization is described, in which at least one telogenic compound and at least one taxogenic compound are reacted at from 40.degree. to 150.degree. C. under a pressure of from 0.1 to 3 MPa in the presence of at least one catalyst in an elongate cylindrical reaction space. After it has left the reaction space, the reaction mixture is separated, for example by distillation, the desired higher-molecular telomers are discharged as the bottom product, and the undesired low-molecular telomerization products are stripped off over the top, condensed and recycled into the process in a first circulation. In a second circulation, a part of the reaction mixture is taken off towards the end of the reaction space and reintroduced into the initial part of the reaction space. This allows an improved space-time yield and a better selection of defined product cuts.Type: GrantFiled: December 19, 1990Date of Patent: November 26, 1991Assignee: Hoechst AktiengesellschaftInventors: Norbert Paul, Rudolf Huber, Ingolf Mielke
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Patent number: 5057633Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes C.sub.n F.sub.2n+1 -Br (n=1 to 20).A perfluoroalkanesulphonyl chloride C.sub.n F.sub.2n+1 -SO.sub.2 Cl is reacted with a compound of formula: ##STR1## in which X represents a nitrogen or phosphorus atom and R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be identical or different, each represent an optionally substituted hydrocarbon radical, it also being possible for one of these symbols to be a hydrogen atom.Type: GrantFiled: November 21, 1990Date of Patent: October 15, 1991Assignee: Societe AtochemInventors: Gilles Drivon, Pierre Durual, Elie Ghenassia
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Patent number: 5017718Abstract: A process for preparing a perfluoroalkyl-substituted compound is disclosed. The process comprises reacting a halopolyfluoroalkane having 1 to 20 carbon atoms with a compound selected from the group consisting of (1) a substituted or unsubstituted ethylene, (2) a substituted or unsubstituted acetylene and (3) a substituted or unsubstituted allylsilane, in the presence of a metal-carbonyl complex of the metal of the Group VIII of the Periodic Table. Alternatively, the reaction between the halopolyfluoroalkane and the substituted or unsubstituted allylsilane is effected under radical generating condition.Type: GrantFiled: January 26, 1984Date of Patent: May 21, 1991Assignee: Sagami Chemical Research CenterInventors: Iwao Ojima, Takamasa Fuchikami
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Patent number: 4973762Abstract: A polyfluoroiodide is produced by reacting an acid halide of a polyfluorocarbon in a perhalogenated solvent with I.sub.2 and at least one salt selected from the group consisting of an alkali metal carbonate and an alkaline earth metal carbonate.Type: GrantFiled: June 27, 1989Date of Patent: November 27, 1990Assignee: Daikin Industries Ltd.Inventors: Takashi Tohzuka, Koji Fujiwara
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Patent number: 4912269Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes, CnF.sub.2n+1 -Br (n=1 to 20).Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride, C.sub.n F.sub.2n+1 -SO.sub.2 Cl, in the presence of a catalyst consisting of a tertiary amine or phosphine or a quaternary ammonium or phosphonium salt, at a temperature ranging from 80.degree. to 200.degree. C.Type: GrantFiled: June 28, 1988Date of Patent: March 27, 1990Assignee: AtochemInventors: Gilles Drivon, Pierre Durual, Bernard Gurtner, Andre Lantz
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Patent number: 4833274Abstract: New perfluoroalkanes and haloperfluoroalkanes, having low melting point and high thermal and chemical stability, constituted by preferably branched perfluorinated and haloperfluorinated chains, obtained by starting from precursors containing two halogen atoms equal to or different from each other, one of them necessarily being an iodine atom, which are reacted with C.sub.3 F.sub.6 and possibly subsequently halogenated with either fluorine or chlorine or bromine.Type: GrantFiled: January 28, 1988Date of Patent: May 23, 1989Assignee: Ausimont S.p.A.Inventors: Gerardo Caporiccio, Gianangelo Bargigia, Claudio Tonelli, Vito Tortelli
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Patent number: 4801763Abstract: A process is disclosed for purifying and stabilizing a mixture of regular chlorotrifluoroethyelne telomers of formula RCXCl(CF.sub.2 CFCl).sub.n Br from bromine-containing irregular telomer impurities of similar molecular weight. The telomer mixture is produced by reacting chlorotrifluoroethylene with a telogen of formula RCXClBr, where R is CF.sub.2 Br, or Cl, and X is Cl or F. The telomer mixture is then chlorinated using either elevated temperature alone (100.degree. C.-350.degree. C.), or a combination of elevated temperatures (100.degree. C.-200.degree. C.) and light energy primarily of the wavelength region greater than about 3000.degree.A. Under these conditions, CFClBr telomer end group of the regular or normal telomer is chlorinated to form --CFCl.sub.2 end groups, while the bromine-containing irregular telomer impurities (whose bromine-containing end groups are substantially only --CF.sub.2 Br) are substantially not chlorinated.Type: GrantFiled: July 27, 1987Date of Patent: January 31, 1989Assignee: Occidental Chemical CorporationInventors: James J. Maul, Bobby F. Dannels, David Y. Tang
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Patent number: 4760205Abstract: New processes for the preparation of 2-iodo-perfluoro-2-methyl-butane and the corresponding -pentane are described. In one process, perfluoro-2-methyl-2-butene or the corresponding -pentene is reacted in an amount of at least 5 mol with a mixture of 2 mol of iodine and 1 mol of iodine pentafluoride in the presence of more than 1 mol of at least one fluoride of a metal of group I of the periodic table of the elements under the autogenous pressure of the reaction mixture at 170.degree. to 220.degree. C. for 2 to 30 hours. In another process, the same perfluoroolefins are reacted, as the starting substances, with iodine and an alkali metal fluoride in the presence of at least 1 mol of a soluble silver salt per mole of the perfluorinated olefin at 20.degree. to 100.degree. C. for 0.5 to 10 hours. After working up by distillation, the pure iodoperfluoroalkanes are obtained. They are suitable for numerous reactions, but in particular as a packing for lasers.Type: GrantFiled: December 31, 1986Date of Patent: July 26, 1988Assignee: Hoechst AktiengesellschaftInventors: Anton Probst, Klaus Raab, Konrad von Werner
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Patent number: 4754085Abstract: Process for the preparation of hydro(halo)fluoroalkanes by direct fluorination in liquid phase with elemental fluorine at low temperature (under 0.degree. C.) of the corresponding hydro(halo)=alkenes.Type: GrantFiled: October 20, 1986Date of Patent: June 28, 1988Assignee: Ausimont S.p.A.Inventors: Claudio Gervasutti, Lino Conte, Gian Paolo Gambaretto
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Patent number: 4748284Abstract: A process for preparing 1,1-dihalo-1,2,2,2-tetrafluoroethanes by isomerization of 1,2-dihalotetrafluoroethanes at their reflux temperature, by using, as a catalyst, the reaction product prepared "in situ" from an anhydrous aluminum halide with at least equimolecular amounts of the isomer, 1,1-dihalo-1,2,2,2-tetrafluoroethane in a medium consisting of 1,2-dihalotetrafluoroethane. The products find application as intermediates for pyrethroid insecticides.Type: GrantFiled: December 19, 1986Date of Patent: May 31, 1988Assignee: Montedison S.p.A.Inventors: Franco Gozzo, Nicola Troiani, Paolo Piccardi
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Patent number: 4675088Abstract: Pentafluorotellurium hypohalites are reacted with fluorocarbon iodides to form intermediate adducts which are thereafter decomposed to form fluorocarbons containing the TeF.sub.5 O-- group.Type: GrantFiled: January 31, 1986Date of Patent: June 23, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Carl J. Schack, Karl O. Christe
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Patent number: 4668710Abstract: Included are trihalovinyl polyol ethers. The compositions have pendant 1,2,2-trihaloethenyl moieties. The compositions may be low viscosity oils or highly polymeric such as incorporated with a urethane or other polymers. One of the uses of the compositions is as flame retardants which may have high thermal stability and scorch resistance.Type: GrantFiled: December 23, 1985Date of Patent: May 26, 1987Assignee: The Dow Chemical CompanyInventors: Chester E. Pawloski, William J. Kruper, Jr.
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Patent number: 4501869Abstract: An easily cross linkable fluorine-containing polymer comprising: (1) a polymeric chain comprising one or more polymer segments, at least one polymer segment of which consists of units of at least one fluorine-containing ethylenically unsaturated compound having 2 to 8 carbon atoms, or units of said fluorine-containing ethylenically unsaturated compound and at least one other monomer selected from the group consisting a fluorine-free ethylenically unsaturated compound having 2 to 4 carbon atoms and a fluorine-containing diene having 4 to 8 carbon atoms, (2) at least one bromine atom liberated from a brominated compound of the formula: RBr.sub.x (wherein R is a saturated hydrocarbon residue and x is a number corresponding to the bonding valency of the residue R) in an amount of 0.Type: GrantFiled: July 26, 1983Date of Patent: February 26, 1985Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Masahiko Oka, Hideo Kano, Masayasu Tomoda, Yutaka Ueta
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Patent number: 4489211Abstract: A process for producing 2,2,2-trifluoroethanol, which is used for modifying inorganic high polymers such as phosphazene polymers being thermo-resistant, inflammable and oil-resistant, by employing .gamma.-butyrolactone as a reaction solvent.Type: GrantFiled: February 1, 1983Date of Patent: December 18, 1984Assignees: Onoda Cement Co., Ltd., Toyo Soda Manufacturing Co., Ltd.Inventors: Eiji Ogura, Kunihiro Mito, Shoji Arai
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Patent number: 4359371Abstract: A process for brominating fluorine-containing halogenated hydrocarbons is disclosed which comprises the step of reacting at least one halogenated fluorohydrocarbon compound of formula (I) ##STR1## wherein R.sub.1 represents hydrogen, fluorine, chlorine, bromine or a lower alkyl group which is perhalogenated by a halogen selected from the group consisting of fluorine, chlorine and bromine;R.sub.2 represents hydrogen, fluorine, chlorine, or bromine, and;R.sub.3 represents fluorine or perfluorinated lower alkyl, in gaseous form with bromine under irradiation with light having a wavelength from about 250 nm to about 600 nm in the presence of an active amount of chlorine not exceeding about 2 moles per mole of bromine at a reaction temperature not exceeding 300.degree. C., which is sufficient for transforming the reactants into sufficiently stable gaseous compounds and for substituting the hydrogen in a compound of formula (I) by bromine to form a compound of formula (II) ##STR2## wherein R.sub.1, R.sub.2 and R.Type: GrantFiled: December 1, 1980Date of Patent: November 16, 1982Assignee: Kali-Chemie AGInventors: Horst Bohm, Werner Rudolph, Joachim Massonne
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Patent number: 4243770Abstract: An easily cross linkable fluorine-containing polymer substantially comprising: (1) a polymeric chain comprising one or more polymer segments, of which at least one polymer segment consisting of units of vinylidene fluoride alone or of units of vinylidene fluoride and one or more of other fluoroolefins, and (2) at least one iodine atom liberated from an iodinated compound of the formula: RI.sub.x (wherein R is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon residue having 1 to 8 carbon atoms and x is an integer of 1 or 2 corresponding to the bonding valency of the residue R) in an amount of 0.Type: GrantFiled: April 7, 1978Date of Patent: January 6, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Takeshi Suzuki, Masayasu Tomoda, Yasuyoshi Furukawa, Yutaka Ueta
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Polyhalogenated hydrocarbons, useful as insecticide intermediates, and methods for their preparation
Patent number: 4228107Abstract: Polyhalogenated hydrocarbons of general formula RR.sup.1 CH--CHX--CH.sub.2 CYZQ wherein R is hydrogen or lower alkyl, R.sup.1 is lower alkyl, X is Cl, Br or I, Y is F, Cl or Br, Z is Y or Q and Q is a group W(CF.sub.2).sub.m --in which W is hydrogen, F or Cl and m is 1 or 2, provided that X is always Br or I when at least one of Y and Z is Br, and a process for preparing these polyhalogenated hydrocarbons by reacting an alkyl-substituted butene with a polyhalogenated alkane having from 2 to 4 carbon atoms, in the presence of a catalyst.Type: GrantFiled: May 17, 1979Date of Patent: October 14, 1980Assignee: Imperial Chemical Industries LimitedInventors: David Holland, David J. Milner, Roger K. Huff -
Patent number: T107801Abstract: A process for rapidly curing a fluoroelastomer which comprises mixing and heating a fluoroelastomer copolymer whose interpolymerized units consist essentially of vinylidene fluoride, at least one other fluorine-containing monomer copolymerizable therewith, said monomer being a compound which contains 2-7 carbon atoms, contains no bromine, and contains at least as many fluorine atoms as carbon atoms and contains up to 3 mole percent of units derived from a bromine-containing olefin; a quaternary phosphonium compound; a bisphenol or an ammonium or phosphonium salt thereof; and a dialkylaminopyridine or a diazabicyclo compound having the formula ##STR1## where n is 2-8 or 0.2-0.8 parts by weight per hundred parts fluoroelastomer of a carboxylic acid salt of (a) or (b).Type: GrantFiled: October 9, 1984Date of Patent: May 5, 1987Inventor: Arthur Nersasian