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| Number | Title | Issue Date |
| 8119750 | Explosion taming surfactants for the production of perfluoropolymers A process comprising polymerizing tetrafluoroethylene in an aqueous emulsion in the presence of a non-telogenic surfactant having an anionic portion with the general formula (I): Rf—O-L-CO2— (I) wherein Rf | 02/21/2012 |
| 8080621 | Aqueous process for making fluoropolymers A novel aqueous polymerization process for making fluoropolymer dispersions is disclosed in which non-ionic non-fluorinated emulsifier is used to produce fluoropolymer emulsions. The emulsifiers contain blocks of polyethylene glycol, polypropylene glycol and/or poly... | 12/20/2011 |
| 8071702 | Low equivalent weight ionomer An ionomer and a process for forming the ionomer such that the ionomer has (1) low equivalent weight (below 950, preferably between 625 and 850, and most preferably between 675 and 800) and (2) high conductivity (greater than 0.13 S/cm). In another embodiment, the i... | 12/06/2011 |
| 8053538 | Ether composition and solution composition To provide an ether composition containing no —OCF2O— structure, having a low viscosity and being excellent in chemical stability in a wide temperature range. An ether composition comprising a polyether compound (A) containing at least two —(OCF | 11/08/2011 |
| 8017709 | Fluorinated polymer and fluorinated polymer composition containing it To provide an amorphous fluorinated polymer which is soluble in a fluorinated solvent having a boiling point of at most 70° C., and a fluorinated polymer composition containing it. An amorphous fluorinated polymer characterized by having a fluorine content of at le... | 09/13/2011 |
| 7932335 | Fluorine-containing elastomer and composition thereof A fluorine-containing elastomer having a copolymer composition, which comprises (a) 50-85 mol. % of vinylidene fluoride, (b) 0-25 mol. % of tetrafluoroethylene, (c) 7-20 mol. % of perfluoro(methyl vinyl ether), (d) 2.5-15 mol. % of CF2═CFO[CF2 | 04/26/2011 |
| 7923519 | FEP pellet An FEP pellet having a volatile content of 0.2% by weight or less. The FEP pellet satisfies the following requirements (i) and (ii) when used to form a insulating material coating a core wire by extrusion coating at a coating speed of 2,800 ft/min.: (i) an adhesive ... | 04/12/2011 |
| 7915361 | Fluorocopolymer, process for producing fluorocopolymer, fluorocopolymer curable composition, and cured object The present invention has for its object to provide a fluorocopolymer which is available at low cost, has fluidity at room temperature, and is curable, a method of producing the same copolymer and a curable composition having good processability and in situ moldabil... | 03/29/2011 |
| 7910671 | Linear perfluoropolyethers having an improved thermooxidative stability Linear perfluoropolyethers of formula: T-O(CF2O)n(CF2CF2O)m(CF2CF2CF2O)r(CF2CF2CF2CF2O)s-T1... | 03/22/2011 |
| 7902311 | Electrolyte polymer for polymer electrolyte fuel cells, process for its production and membrane-electrode assembly To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen... | 03/08/2011 |
| 7884166 | Elastic fluorocopolymer, its composition and crosslinked rubber An elastic fluorocopolymer comprises repeating units (l) based on a fluoromonomer such as tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride or CF2═CF—O—Rf (wherein Rf is a C1-8 saturated perfluoroalkyl gr... | 02/08/2011 |
| 7872081 | Melt-processible poly(tetrafluoroethylene) Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described. ... | 01/18/2011 |
| 7855259 | Method for producing melt-processable fluororesin To provide a method for producing a melt-processable fluororesin, which is capable of increasing the molecular weight of the fluororesin and preventing coloration of the fluororesin, by using a specific fluorinated emulsifier other than ammonium perfluorooctanoate. ... | 12/21/2010 |
| 7754837 | Flourinated aryl ether polymers exhibiting dual fluoroolefin functionality and methods of forming same Disclosed are telechelic fluoropolymers and methods for forming the polymers. The fluoropolymers can be formed via step-growth polymerization of bis(trifluorovinyloxy)biphenyls with bisphenols. The formed telechelic polymers possess fluoroolefin functionality at the... | 07/13/2010 |
| 7700700 | Vinylidene fluoride copolymer composition with improved low-temperature impact properties This invention relates to a heterogeneous copolymer composition of polyvinylidene fluoride with one or more perfluoroalkyl ethers. These copolymers have excellent low temperature impact properties, while maintaining a high melting point. ... | 04/20/2010 |
| 7696291 | Fluoropolymer for chromatic aberration-free lens and chromatic aberration-free lens A material having properties required for a chromatic aberration-free lens and excellent in moldability and impact resistance, which material is an amorphous fluoropolymer containing a carbon atom chain as a main chain and containing a fluorinated atom-bonded carbon... | 04/13/2010 |
| 7638588 | Fluororesin and coated electric wire A fluororesin which does not cause cone break, when used for insulating a core wire having a diameter of 0.05 to 0.07 mm under the conditions of a resin temperature of 320 to 370° C., a drawdown rate [DDR] of 80 to 120, a draw rate balance [DRB] of 1.0, a wire coat... | 12/29/2009 |
| 7582714 | Fluorinated polymers, method for producing the fluorinated compounds and polymers A fluorinated polymer comprising a unit represented by the following formula (1), a method for producing fluorinated compounds and the fluorinated polymers, and an optical/electrical material or coating material comprising the fluorinated polymer. ... | 09/01/2009 |
| 7579418 | Extrusion process and product The present invention relates to the process of extruding melt drawing fluoropolymer onto conductor to form insulated conductor at a line speed of at least 533 m/min and having no more than 10 sparks and no more than 2 lumps/13.7 km of insulated conductor under cond... | 08/25/2009 |
| 7563852 | Fluoropolymer coagulation method and composition Provided is a method of manufacturing a perhalogenated elastomer comprising using an onium compound to coagulate a latex comprising polymer particles, the polymer particles consisting essentially of interpolymerized units of one or more perhalogenated comonomer(s) a... | 07/21/2009 |
| 7544752 | TFE-based thermoprocessable copolymers TFE-based thermoprocessable copolymers having the following composition, expressed in percentage by moles on the total of the monomers: A) from 0.01 to 15% of the monomer of formula: CF2═CFOCF2OCF3 (a); ... | 06/09/2009 |
| 7544753 | Process for producing elastic fluorocopolymer and crosslinked fluororubber A process for producing an elastic fluorocopolymer, by emulsion-polymerizing at least one fluoromonomer (a), a vinyl ester monomer (b) represented by the formula CR1R2═CR3COOCH═CH2 optionally, at least one hydrocarbon ... | 06/09/2009 |
| 7538170 | Fluorocopolymer, process for producing fluorocopolymer, fluorocopolymer curable composition, and cured object The present invention has for its object to provide a fluorocopolymer which is available at low cost, has fluidity at room temperature, and is curable, a method of producing the same copolymer and a curable composition having good processability and in situ moldabil... | 05/26/2009 |
| 7538171 | Fluorine-containing copolymer A fluorine-containing copolymer, which comprises a hydroxyl-terminated fluorine-containing vinyl ether, represented by the following general formula: CF2═CFORfCH2OH (where Rf is a fluoroalkylene group, a fluoroalkyl... | 05/26/2009 |
| 7534845 | 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 group c... | 05/19/2009 |
| 7521513 | Semi-batch process for producing fluoroelastomers A novel semi-batch emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a hydrocarbon anionic surfactant is employed as the dispersing agent. The surfactant has the formula R-L-M wherein R is an alkyl group having between 6 and... | 04/21/2009 |
| 7514512 | Fluoroelastomers VDF-based curable fluoroelastomers having glass transition temperature lower than −35° C. and an amount of —COF end groups in the polymer lower than the sensitivity limit of the method using the FT-IR spectroscopy described in the present application. ... | 04/07/2009 |
| 7488788 | Electrolyte polymer for polymer electrolyte fuel cells, process for its production and membrane-electrode assembly To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen... | 02/10/2009 |
| 7488787 | Perfluoroelastomers Perfluoroelastomers curable by peroxidic way having glass transition temperature lower than −10° C. and an amount of —COF end groups in the polymer lower than the sensitivity limit of the method using the IR spectroscopy in Fourier transform described in the pr... | 02/10/2009 |
| 7479530 | Polymer having charged units A polymer comprising one or more macromonomer units selected from the group consisting of polysiloxane, perfluoroalkylpolyether (PFPE), fluorinated poly(meth)acrylate, polyalkyl (meth)acrylate, polyolefin and fluorinated polyolefin, and one or more charged units (su... | 01/20/2009 |
| 7462675 | Thermoplastic copolymer of tetrafluoroethylene and perfluoromethyl vinyl ether and medical devices employing the copolymer An improved elastomeric material is described comprising an essentially noncross-linkable amorphous copolymer of tetrafluoroethylene (TFE) and perfluoromethyl vinyl ether (PMVE) which is both a thermoplastic and exhibits exceptional mechanical properties. This mater... | 12/09/2008 |
| 7459512 | Process for preparing perfluoroalkyl vinyl ether copolymer and copolymer Disclosed herein are a novel perfluoroalkyl vinyl ether compound, a process for preparing a copolymer by using the perfluoroalkyl vinyl ether compound, and an optical plastic material comprising a copolymer prepared by the process. More specifically, the perfluoroal... | 12/02/2008 |
| 7438995 | Use of partially fluorinated polymers in applications requiring transparency in the ultraviolet and vacuum ultraviolet Disclosed are partially fluorinated and fully fluorinated polymers that are substantially transparent to ultraviolet radiation at wavelengths from approximately 150 nanometer to 260 nanometers. ... | 10/21/2008 |
| 7435785 | Fluoropolymer coagulation method and composition Provided is a method of manufacturing a perhalogenated elastomer comprising using an onium compound to coagulate a latex comprising polymer particles, the polymer particles consisting essentially of interpolymerized units of one or more perhalogenated comonomer(s) a... | 10/14/2008 |
| 7429631 | Fluorocopolymer A fluorecopolymer which comprises repeating units (a) based on tetrafluoroethylene, repeating units (b) based on perfluoro(methyl vinyl ether) and repeating units (c) based on perfluoro(propyl vinyl ether) in a molar ratio of (a)/(b)/(c) of 40-70/3-57/3-57. The fluo... | 09/30/2008 |
| 7408011 | Photoresists, fluoropolymers and processes for 157 nm microlithography The invention provides a polymer having (a) at least one repeat unit derived from an ethylenically unsaturated compound having at least one fluorine atom covalently attached to an ethylenically unsaturated carbon atom; and (b) at least one repeat unit derived from a... | 08/05/2008 |
| 7402640 | Fluoropolymer and film made of it A fluorocopolymer and film thereof exhibiting excellent transparency and mechanical strength at ambient and elevated temperatures, wherein the fluorocopolymer includes polymerized units based on ethylene (E), tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and ... | 07/22/2008 |
| 7399815 | Fluorine-containing allyl ether compounds, their copolymers, and resist compositions and anti-reflection film materials using such copolymers The invention relates to a fluorine-containing allyl ether compound represented by the formula 1, wherein R represents an organic group containing at least one fluorine atom and an alicyclic structure. The invention further... | 07/15/2008 |
| 7399791 | Fluorinated membranes Ionomeric membranes comprising (per)fluorinated, se-micrystalline or amorphous, ionomeric polymers, having equivalent weight (EW) from 380 g/eq to 1,800 g/eq, which used in fuel cells, under the following conditions: membrane thick... | 07/15/2008 |
| 7393624 | Negative resists based on acid-catalyzed elimination of polar molecules The present invention provides polymers that are useful in negative resist compositions. Polymers of the present invention comprise (1) a first monomer having a polar functional group; (2) a second monomer; and optionally, (3) a third monomer that imparts at least o... | 07/01/2008 |
