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| Number | Title | Issue Date |
| 8350094 | Methods of making fluorinated ethers, fluorinated ethers, and uses thereof A method of making a fluorinated ether includes combining, in a polar aprotic solvent: a fluorinated alcohol represented by the formula X—Rf1CH2OH, and a fluorinated sulfonate ester represented by the formula Rf2 | 01/08/2013 |
| 8071816 | Hydrofluoroacetal compounds and processes for their preparation and use The present disclosure provides a compound according to the formula: Rf1[CH(—O—CH(3-m)Rf2m)(—O—CF2—CFH—Rf3)]n [I] wherei... | 12/06/2011 |
| 7772443 | Iodine-containing fluoropolyether and process for producing the same An iodine-containing fluoropolyether represented by the following general formula [I]: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nI [I] (where Rf is a perfluoroalkyl group having 1-3 carbon atoms,... | 08/10/2010 |
| 7388114 | Perfluoropolyether derivative A novel perfluoropolyether derivative which is less likely to undergo decomposition, which is free from a problem of deterioration during its use, and which is useful as a lubricating oil or a coating agent, is provided. A compound represented by the followin... | 06/17/2008 |
| 7388646 | Perfluoropolyethers Use in optical systems as liquids to transmit light at wave lengths lower than 250 nm, in particular at 157 nm, of perfluoropolyethers having the following formula: X1—O(CF2O)n(CF2CF2O)m(C... | 06/17/2008 |
| 7319173 | Process for preparing fluorohalogenethers A process for preparing (per)fluorohalogenethers having general formula: wherein: A and A′, equal to our different from each other, are selected among Cl, Br, H; m=1, 2; n=0, 1; R1 is a flu... | 01/15/2008 |
| 7288682 | Separation of bifunctional perfluoropolyethers (PFPEs) having -CHOH termination from their mixtures with -CHOH monofunctional PFPEs A process for separating bifunctional perfluoropolyethers (PFPEs) having two terminations —CH2OH from their mixtures with monofunctional PFPEs with one termination —CH2OH, of general formula X1—O—Rf—Y (I) | 10/30/2007 |
| 7252886 | Curable composition and process for producing cured fluorinated product To provide a curable composition which gives a cured fluorinated product excellent in transparency, light resistance (particularly against a short wavelength light having a wavelength of from 200 to 500 nm) and heat resistance, and having a controlled volume particu... | 08/07/2007 |
| 7230140 | Perfluoropolyether derivative A novel perfluoropolyether derivative which is less likely to undergo decomposition, which is free from a problem of deterioration during its use, and which is useful as a lubricating oil or a coating agent, is provided. A compound represented by the followin... | 06/12/2007 |
| 7193118 | Method for producing fluoroalkyl ether A method for producing a fluoroalkyl ether, which comprises reacting a fluoroalkyl alcohol with a fluorinated olefin in the presence of a solvent and a catalyst, wherein the fluoroalkyl alcohol and the fluorinated olefin are continuously supplied into a reactor, a r... | 03/20/2007 |
| 7160967 | Fluorovinyl ethers and polymers obtainable therefrom Fluorovinyl ethers having the formula CFX═CXOCF2OR, wherein R is a C2–C6 linear, branched or C5–C6 cyclic (per)fluoroalkyl group, or a C2–C6 linear, branched (per)fluoro oxyalkyl gr... | 01/09/2007 |
| 7141704 | Process for preparing hydrofluoroethers Process for obtaining hydrofluoroethers of formula (I): A-(Rf)n0—CF(Rf1)—O—Rh (I) wherein a mono- or bifunctional carbonyl compound of formula (IV): B—Rf—C(O)Rf1... | 11/28/2006 |
| 7074472 | Hard coat agent composition and optical information medium using the same The present invention provides a hard coat agent composition that is useful for forming a hard coat layer with excellent anti-staining properties and lubricity, as well as superior scratch resistance and abrasion resistance, on the surfaces of various articles. The ... | 07/11/2006 |
| 6936722 | Polyhalogenated ethers (Per)haloethers having formula: X—(Rf)L—O—CF2CF2—O—CX1X2—CFX3X4 (I), process for obtaining them and hypofluorites usable in the synthesis of said (per)h... | 08/30/2005 |
| 6770776 | Synthesis of fluorocarbon compounds Fluorocarbon compounds are synthesized by reacting a substrate hydrocarbyl compound containing at least one sp3-hybridized halophoric carbon atom bearing at least two halogen atom substituents, at least one of which is a halogen atom having an atomic numb... | 08/03/2004 |
| 6716534 | Coating composition comprising a fluorochemical polyether silane partial condensate and use thereof A composition comprising a least one fluorochemical polyether silane compound having a polyfluoropolyether segment and at least two hydrolysable silane groups per molecule, one or more non-fluorinated compounds having at least two hydrolysable groups per molecule, a... | 04/06/2004 |
| 6509509 | Process for the preparation of perfluoropolyoxyalkylenes with hydroxyl end groups A process for preparing perfluoropolyoxyalkylenes with hydroxyl end groups having structure: T1 --CFW1 --O--Rf --CFW2 --T2 (I) wherein: T1, T2, are selected from --CH2 OH, --F,... | 01/21/2003 |
| 6506947 | Fluorinated diol and method for the production thereof The subject-matter of the invention is a fluorinated diol and its process of preparation. The fluorinated diol corresponds to the formula (I): Cn F2n+1 --A--CH2 OCH2 --C(CH2 OH)2 --R in which n has a... | 01/14/2003 |
| 6410808 | Method for producing a fluoroalcohol A method for producing a fluoroalcohol of the following formula 1a, which comprises reacting a compound of the following formula 1 with water in a liquid phase at a temperature of 150° C. or higher under a gauge pressure of 0.4 MPa or higher: ##STR1... | 06/25/2002 |
| 6362379 | Method of making chlorofluoroethers A method is provided for preparation of chlorofluoroethers ClCF2 CFClOR8f and Cl2 CFCFClOR8f by direct fluorination of Cl2 CHCH2 OR8 and Cl3 CCH2... | 03/26/2002 |
| 6361713 | Omega-hydrofluoroalkyl ethers, precursor carboxylic acids and derivatives thereof, and their preparation and application Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the... | 03/26/2002 |
| 6316636 | Synthesis of fluorocarbon compounds Fluorocarbon compounds are synthesized by reacting a substrate hydrocarbyl compound containing at least one sp3 -hybridized halophoric carbon atom bearing at least two halogen atom substituents, at least one of which is a halogen atom having an... | 11/13/2001 |
| 6315869 | Process for purification of perfluorovinyl ethers A perfluorovinyl ether of the formula: RfO(CF2 CFXO)n CF.dbd.CF2 (1) in which Rf is a perfluoralkyl group, X is a fluorine atom or a trifluoromethyl group, and n is a number of 0 to 20 containing impurities is purified by remo... | 11/13/2001 |
| 6255535 | Fluorine containing allylethers and higher homologs The present invention describes a novel process for the preparation of perfluoro allyl ethers. The process involves providing a hydrogen-containing precursor comprising at least one 1,2-dichloro alkyl ether moiety, fluorinating the precursor to provide a ... | 07/03/2001 |
| 6099937 | High molecular weight fractioned lubricant for use with thin film magnetic media Disclosed is a perfluoropolyether (PFPE) lubricant comprising less than about 10 percent PFPE molecules having a molecular weight lower than about 2000 Daltons, and wherein the average molecular weight of the lubricant is greater than about 5000 Daltons. ... | 08/08/2000 |
| 6072088 | Chemical compounds having two trifluoromethyl groups A compound having the formula: CF3 CH2-w (H1-x CH2-y Rm R'n CH1-z)p H2-q CF3 wherein w=0, 1 or 2; x=0 or 1; y=0, 1 or 2; m=0, 1 or 2; n=0 or 1; z=0 or ... | 06/06/2000 |
| 5965779 | Fluorooxetane compound and process for its preparation The present invention provides processes for preparing 2,2,3,3,4-pentafluorooxetane and/or 2,2,3,3,4,4-hexafluorooxetane which comprises reacting 2,2,3,3-tetrafluorooxetane with fluorine gas, the process inhibiting decomposition of the oxetane ring during... | 10/12/1999 |
| 5917008 | Polytetrafluoroethylene dispersions in an organic solvent and dispersing agents employed therein Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising: (A) from 2 to 40% by weight of PTFE in powder form; (B) from 50 to 95% by weight of an organic solvent; (C) from 0.5 to 10% by weight of a dispersing agent of formula: (RH -L) | 06/29/1999 |
| 5877357 | Process for preparing perhaloethers from perhaloolefins and new perhaloethers thereby obtained The invention relates to a process for preparing perhaloethers from perhaloolefins and to a few "per se" new classes of perhaloethers thereby obtained. The process consists in reacting a perhalomonoolefin with a fluoroxy compound Rx --OF (where... | 03/02/1999 |
| 5856587 | Flame extinguishing compositions Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having general formula HF2 CO(CF2 O)n (CF2 CF2 O)m CF2 H wherein n and m are integer... | 01/05/1999 |
| 5814698 | Polytetrafluoroethylene dispersions in an organic solvent and dispersing agents employed therein Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising: (A) from 2 to 40% by weight of PTFE in powder form; (B) from 50 to 95% by weight of an organic solvent; (C) from 0.5 to 10% by weight of a dispersing agent of formula: (RH --L)... | 09/29/1998 |
| 5789534 | Process for purifying a fluorinated polyether having at an end thereof a terminal vinyl group linked thereto through an amide group-containing linkage The purification process comprises removing carboxylic acids and/or carboxylic acid salts contained as impurities in a fluorinated polyether having at at least one end thereof a terminal vinyl group linked thereto through an amide group-containing linkage... | 08/04/1998 |
| 5705713 | Preparation of fluoro compounds Fluoro compounds are made by reaction of an activated oxy-acid ester or cyclic ether starting material with hydrogen fluoride in the presence of an organometallic compound.... | 01/06/1998 |
| 5677406 | Lengthened difunctional perfluoropolyether oils and rubbers prepared therewith The invention relates to a difunctional perfluoropolyether oil, prepared by reacting a perfluoropolyether diol oil having a weight average molecular weight (Mw) of 1500 to 3000 with a chain lengthener selected from the group consisting of diacid chlorides... | 10/14/1997 |
| 5648560 | Process for preparing perhaloethers from perhaloolefins and new perhaloethers so obtained A process for preparing perhaloethers from perhaloolefins by reacting at least one fluorooxy compound Rx --OF, wherein Rx is a perhaloalkyl radical, with a perfluoroolefin in a liquid phase, optionally containing an organic solvent i... | 07/15/1997 |
| 5576464 | Removal of methanol from methyl tertiary butyl ether MTBE, prepared by reacting MeOH with TBA to form a primary etherification reaction product, is distilled in a first distillation column to provide a first lower boiling distillation fraction comprising methyl tertiary butyl ether, isobutylene, methanol, d... | 11/19/1996 |
| 5557012 | Fluorination of acetals, ketals and orthoesters This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.... | 09/17/1996 |
| 5491261 | Poly-perfluoroalkyl-substituted alcohols and acids, and derivatives thereof Di-, tri- and poly-perfluoroalkyl-substituted alcohols and acids and derivatives thereof are described which are prepared from perfluoroalkyl iodides and di-, tri- or polyallyl alcohols or acids. These compounds contain two or more perfluoroalkyl-iodoalky... | 02/13/1996 |
| 5476974 | Omega-hydrofluoroalkyl ethers, precursor carboxylic acids and derivatives thereof, and their preparation and application Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the... | 12/19/1995 |
| 5455371 | Method of producing difluoromethyl ethers and esters and ethers and esters produced thereby A process for producing difluoromethyl ethers and esters by reacting an ether or an acid with a cadmium, zinc or bismuth compound containing the CF3 group and selected from the group consisting of Cd(CF3)2, Zn(CF3 | 10/03/1995 |
