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| Number | Title | Issue Date |
| 7488847 | Fluorinated adamantane and its derivatives The present invention provides a process A1 for producing a compound (5A), which comprises fluorinating a compound (3A-1) by liquid phase fluorination to a compound (4A-1), followed by a decomposition reaction of an ester bond; a process A2 for producing a compound ... | 02/10/2009 |
| 7425646 | Fluorinated adamantane derivative A compound represented by the formula AF(—COF)n, provided that AF and n have the following meanings. AF: a fluorinated adamantane residue which is an n-valent group having an n number of hydrogen atoms removed fro... | 09/16/2008 |
| 7371900 | Peroxidic perfluoropolyethers Peroxidic perfluoropolyethers having formula: X1—O(CF2O)n1(CF2CF2O)m1(CF2(CF2)zCF2O)p1(O)h—X2 (I) | 05/13/2008 |
| 7365229 | Peroxidic perfluoropolyethers Peroxidic perfluoropolyethers having formula: X1—O(CF2O)n1(CF2CF2O)m1(CF2(CF2)zCF2O)p1(O)h—X2 (I) | 04/29/2008 |
| 7002040 | Process for purifying fluoroxy compounds This invention relates generally to a improvement in a process for the purification of fluoroxy compounds, such as bis(fluoroxy)difluoromethane and fluoroxytrifluoromethane produced by the fluorination of carbon oxides. The improvement in effecting purification of t... | 02/21/2006 |
| 6919479 | Process for the preparation of perfluoropolyethers acyl-fluoride ended by reduction of the corresponding peroxidic perfluoropolyethers A process for the preparation of perfluoropolyethers of formula: T-CFX′—O—Rf—CFX—COF (I) wherein: T=COF, F, C1-C3 perfluoroalkyl; X, X′=—F, —CF3; ... | 07/19/2005 |
| 6894187 | Method for producing a fluorine-containing compound The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available. ... | 05/17/2005 |
| 6407282 | Process for producing monoester from dicarboxylic acid fluoride Monoester monoacid fluoride of dicarboxylic acid is produced by allowing dicaroxylic acid fluoride represented by the following general formula: FOCCF(CF3)OCF2 (A)p(CF2)qCOF where A is a bifunctional perfluorinated group having 1 to... | 06/18/2002 |
| 6127498 | Modified hydrogenated polymers Hydrogenated fluoromodified polymers obtainable by reaction among hydrogenated polymers and the modifier having a polyether structure: RfO(CF2 CF2 O)m (CF2 O)n --CF2 --Aq --Tp | 10/03/2000 |
| 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 |
| 5543567 | 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.... | 08/06/1996 |
| 5416243 | Cyclofluoroalkylated fullerene compounds Cyclofluoralkylated fullerene compounds are prepared by reacting the fullerenes with a fluoroalkene as exemplified by tetrafluoroethylene or perfluoromethyl vinyl ether under thermolysis conditions as exemplified by temperatures of 200° C., pressure and ... | 05/16/1995 |
| 5382718 | Cyclofluoroalkylated fullerene compounds Mixtures of cyclofluoroalkylated fullerenes are provided by the thermal 2+2 cycloaddition of fluoroalkenes to a solution or slurry of a fullerene. The cyclofluoroalkylated fullerene mixtures are useful as lubricants or additives to lubricants; in fluoroca... | 01/17/1995 |
| 5300683 | 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.... | 04/05/1994 |
| 5252400 | Fluorine-containing compounds Disclosed in this invention are novel fluorine-contianing compounds of a specific molecular structure having a fluoroalkylether terminal group, an aliphatic hydrocarbon terminal group and an imino terminal group in the same molecule and a molecular weight... | 10/12/1993 |
| 5202480 | 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.... | 04/13/1993 |
| 5164517 | Process for preparing fluoropolyethers and perfluoropolyethers having neutral or functional end groups and a controlled molecular weight This invention relates to a process for preparing fluoropolyethers and perfluoropolyethers having neutral and/or functional end groups and a lower molecular weight by a selective catalytic cleavage of the corresponding higher molecular weight fluoropolyet... | 11/17/1992 |
| 5093523 | Process for the preparation of perfluorosuccinylfluoride A perfluorosuccinylfluoride is prepared by the reaction of a gaseous mixture of 1,4-dibromoperfluorobutane with SO3 in oleum with at least 65% of free SO3 containing a catalyst comprising, besides mono- and bi-valent mercury sulphate... | 03/03/1992 |
| 5053536 | 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.... | 10/01/1991 |
| 4987254 | Fluorinated carboxylic acid fluorides Fluorinated carboxylic acid fluorides of the formula I ##STR1## can be prepared from fluorinated vinyl ethers of the formula II ##STR2## by reacting the vinyl ethers with an oxygen-containing gas in the presence of a catalytic amount of a Lewis ... | 01/22/1991 |
| 4912216 | Method for production of perfluoro-(N-vinylamine) compounds A perfluoro-(N-vinylamine) compound containing a >NCF.dbd.CF2 group is produced from a perfluoro-compound containing a group of the general formula: ##STR1## (wherein X stands for a fluorine atom or a --OM group having an alkali or al... | 03/27/1990 |
| 4904417 | Fluorine-containing polyether and process for preparing the same A fluorine-containing polyether of the formula: A--X--A' wherein A and A' are the same or different and are each --COF, --COCl or --COOH, and X is --CF2 CF2 --Rf --O--Cm F2m --O--Rf 'CF2 | 02/27/1990 |
| 4891167 | Block polymers containing a poly(aryl ether ketone) and methods for their production Described herein are crystalline block polymers and chain extended polymers containing blocks of crystalline poly(aryl ether ketones). Also, described herein are monomers and oligomers suitable for preparing the crystalline block polymers and chain-extend... | 01/02/1990 |
| 4834922 | Process to produce novel fluorocarbon vinyl ethers and resulting polymers Novel vinyl ethers are prepared in decarboxylation reactions of novel acid fluoride compounds according to the following reaction: ##STR1## wherein a is 0 or an integer greater than 0; b is 0 or an integer greater than 0; n=1 or an integer greater than 1;... | 05/30/1989 |
| 4814372 | Functional perfluoropolyethers and process for the preparation thereof The process for the scission of high molecular weight perfluoropolyethers having neutral end groups obtained from photo-oxidation processes of perfluoroolefins, or fluorination of hydrogenated polyalkylene oxides, or by polymerization with opening of the ... | 03/21/1989 |
| 4792618 | Fluorinated carbocylic compounds Fluoro-substituted carbocyclic compounds are prepared by (A) reacting hydrogen fluoride with a chloro-cyclohexenyl compound of the formula ##STR1## where R1 and R2 are independently selected from the group consisting of --H, --... | 12/20/1988 |
| 4788257 | Process for preparing regulated molecular weight perfluoro-polyethers having neutral and functional end groups A process for the dissociation of high molecular weight perfluoropolyethers to obtain low molecular weight perfluoropolyethers which comprises treating a perfluoropolyether with 0.1-10% by weight of a catalyst consisting of Ti, Cr, Mn, Fe, Co, Ni, V, Cu, ... | 11/29/1988 |
| 4782180 | Process for tetrafluorobenzoic acid An improved process for the preparation of 2,3,4,5-tetrafluorobenzoic acid is described which involves decarboxylation of tetrafluorophthalic acid in the presence of a base catalyst. Also described is an improved method for preparing tetrafluorophthalic a... | 11/01/1988 |
| 4739103 | Perfluorocycloalkane carbonyl fluorides and their derivatives Di- and tri-substituted perfluorocycloalkane compounds which have a cyclohexane or decahydronaphthalene nucleus are provided. These perfluorocycloalkane compounds are carbonyl fluorides and derivatives thereof.... | 04/19/1988 |
| 4739112 | Perfluoropolycycloalkanes Perfluoropolycycloalkanes are provided. These perfluoropolycycloalkanes are ring assemblies having (a) at least two perfluorinated cyclohexane rings, (b) at least two perfluorinated fused ring systems, or (c) combinations of at least one perfluorinated cy... | 04/19/1988 |
| 4720527 | New functionalized perfluoropolyethers and process for the preparation thereof A process for the scission of high molecular weight perfluoropolyethers having neutral end groups obtained from photo-oxidation processes of perfluoroolefins, or fluorination of hydrogenated polyalkylene oxides, or by polymerization with opening of the pa... | 01/19/1988 |
| 4647413 | Perfluoropolyether oligomers and polymers Perfluoropolyether oligomers or block polymers, having a backbone with one or a plurality of perfluoropolyether segments each consisting essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis(perfluoromethyleneoxy-terminated) unit, and (... | 03/03/1987 |
| 4608206 | Fluorinated 3-ketoglutaroyl halides Compounds having the formula: ##STR1## where X is F or Cl, and a process for the preparation of such compounds.... | 08/26/1986 |
| 4582925 | Tetramethylbiphenylcarboxylic acids and derivatives thereof 2,2',6,6'-Tetramethyl-4,4'-dicarboxylic acid is prepared by the oxidation of bimesityl and derivatives of the dicarboxylic acid are used in the preparation of polyesters of high molecular weight.... | 04/15/1986 |
| 4578512 | Process to produce novel fluorocarbon vinyl ethers and resulting polymers Novel vinyl ethers are prepared in decarboxylation reactions of novel acid fluoride compounds according to the following reaction: ##STR1## wherein a is 0 or an integer greater than 0; b is 0 or an integer greater than 0; n=1 or an integer greater than 1;... | 03/25/1986 |
| 4500739 | Process for the insertion of perfluoroolefines on perfluoropolyethers and corresponding products Perfluoropolyether comprising, besides --CF2 -- and --CF2 F4 units, also a third fluoroalkylene unit containing three or more carbon atoms, said units being connected to each other through --O-ether bridges, and process fo... | 02/19/1985 |
| 4496721 | Process for preparing symmetrical bis-carbamates Symmetrical N-substituted bis-carbamoyl sulfide compounds exhibit exceptional broad spectrum pesticidal activity coupled with extremely low mammalian toxicity and phytotoxicity.... | 01/29/1985 |
| 4469641 | Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) of the formula ##STR1## which are intermediates in the preparation of perfluoro-isopropylketocarboxylic acid fluorides from omega-hydro-perfluoro-(2-methyl-alkan-3-ones).... | 09/04/1984 |
| 4460514 | Method for the preparation of poly (carbonyl fluoride) oligomers An improved method for synthesizing poly (carbonyl fluoride) oligomers by using bis(trifluoromethyl)trioxide as a reaction initiator in the photo-oxidation of F-3 methylbutene-1.... | 07/17/1984 |
| 4379768 | Process for producing perfluorosuccinyl fluoride Perfluorosuccinyl fluoride is produced by coupling accompanied by dehalogenation of a difluorohaloacetyl fluoride having the formula wherein X represents I, Br or Cl by reacting with a trapping agent of a halogen at a temperature ranging from 100° to 500° C.... | 04/12/1983 |
