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| Number | Title | Issue Date |
| 7358296 | Aqueous dispersions of fluoropolymers Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a non ionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. T... | 04/15/2008 |
| 7304101 | Method of purifying a dispersion of ionic fluoropolymer Anionic species are removed from aqueous dispersions of ionic fluoropolymers using anion exchange resins. In some embodiments, cationic species are also removed using cation exchange resins. ... | 12/04/2007 |
| 7300989 | Dispersions containing bicomponent fluoropolymer particles and use thereof The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether) homopolymers. The present invention further relates to a method of making an aqueous fluoropolymer dispersion comprising bicomponent particles of poly(perfluorov... | 11/27/2007 |
| 7262246 | Emulsion polymerization of fluorinated monomers The use of perfluorinated polymers and/or fluorinated ionomers as surfactant emulsifiers in emulsion polymerization of fluorinated monomers. ... | 08/28/2007 |
| 7255762 | Camouflage tire The present invention is directed to a camouflage tire suitable for use in various vehicle use environments wherein it is desirable to reduce or eliminate a viewer's visual perception of the tire against the given environmental background. ... | 08/14/2007 |
| 7253240 | Explosion-free process for the production of polytetrafluoroethylene Use of non-water-soluble organic fluorinated compounds, which are gaseous under the polymerization conditions and act as chain transfer agent in the gas phase, as explosion suppressors in the emulsion polymerization of tetrafluoroethylene. ... | 08/07/2007 |
| 7247671 | Aqueous crosslinkable coating compositions based on vinyl fluoropolymer Aqueous crosslinkable coating composition suitable for anti-graffiti and heavy duty applications comprising: (A) an aqueous polymer emulsion comprising at least one vinyl fluoropolymer which comprises as a polymerized constituent monomer thereof (i) a fluoromonomer(... | 07/24/2007 |
| 7214740 | Fluorinated ionomers with reduced amounts of carbonyl end groups The present invention is a fluoropolymer comprising a plurality of pendent groups terminating in —CF2SO3X, —CF2SO2F, or combinations thereof, where X is selected from a group consisting of H+ and a monovalen... | 05/08/2007 |
| 7196133 | Surface tension control agent for coating material and coating material containing same A surface tension control agent for coating materials includes a fluorine-containing (meth)acrylate copolymer obtained by copolymerizing a fluorine-substituted alkyl (meth)acrylate monomer (A), an alkyl (meth)acrylate monomer (B), and a hydroxyl group- or ether grou... | 03/27/2007 |
| 7189780 | Processes to produce water-dispersible polyester stabilized, acid-treated, fluoroalkyl compositions A process to produce an acid-treated aqueous dispersion is provided. The process comprises contacting a polymer, a water dispersible polyester, water, and at least one acid-generating compound; wherein said polymer comprises repeating units from at least one fluoroa... | 03/13/2007 |
| 7186772 | Coating composition for forming self-layering or self-coating lacquer systems Self-coating or self-layering lacquer systems from at least two different resins, oligomers, or polymers, which are emulsifiable or dispersible in water, have different surface tensions, and form self-layering phases. After the application, the phases separate into ... | 03/06/2007 |
| 7186769 | Water-dispersible polyester stabilized fluoroalkyl compositions In this invention, an aqueous dispersion is provided to improve the oil and water repellency of materials. The aqueous dispersion comprises a polymer, at least one water dispersible polyester, and water; wherein the polymer comprises the repeating units from at leas... | 03/06/2007 |
| 7173081 | Processes to produce water-dispersible polyester stabilized fluoroalkyl compositions A process is provided to produce an aqueous dispersion wherein the aqueous dispersion enhances the water and oil repellency of materials. The process comprises: 1) contacting at least one fluoroalkyl monomer, at least one water-dispersible polyester, water, and opti... | 02/06/2007 |
| 7160480 | Leather treated with fluorochemicals A method of treating leather for imparting soil resistance to the leather by contacting the leather with a fluorinated hydrophobic additive comprising at least one fluorinated urethane or a mixture of at least one fluorinated urethane with at least one fluorinated e... | 01/09/2007 |
| 7138438 | Polymeric nanoparticle formulations and their use for improving the dirt pick up resistance of a coating A formulation for repelling particulate matter on the surface of a coating comprising polymeric nanoparticles having a mean particle diameter of from 1 to 50 nm. The polymeric nanoparticles may further be functionalized to impart additional characteristics to modify... | 11/21/2006 |
| 7129298 | Tetrafluoroethylene based resin molding material excellent in high frequency electric characteristics The present invention provides a TFE resin molding material which has electric characteristics, particularly low dielectric dissipation factor, in a microwave area, can also lower extrusion pressure as the material is of low molecular weight and can provide a molded... | 10/31/2006 |
| 7125941 | Aqueous emulsion polymerization process for producing fluoropolymers The present invention provides a method of making a fluoropolymer through emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated surfactant. At least part of the fluorinated surfactant is added to the aqueous... | 10/24/2006 |
| 7101924 | Water-dispersible polyester stabilized, acid-treated, fluoroalkyl compositions In this invention, an acid treated, aqueous dispersion is provided that improves the oil and water-repellency of materials. The acid-treated, aqueous dispersion comprises at least one polymer, at least one water-dispersible polyester, water, and at least one acid-ge... | 09/05/2006 |
| 7094839 | Process for making a fluoroelastomer Aqueous microemulsions obtained from a perfluorinated alkane sulphonic or carboxylic acid or salt thereof, a liquid fluorinated monomer comprising a cure-site and optionally an inert liquid and highly fluorinated hydrocarbon compound. The aqueous microemulsion may b... | 08/22/2006 |
| 7087710 | Polymeric surfactants derived from cyclic monomers having pendant fluorinated carbon groups A fluorine containing polymer which acts as a wetting, flow or leveling agent, and has at least one polar group. The polymer has at least one pendant or ether side chain containing from about 1 to about 20 carbon atoms with at least 25% of the hydrogen atoms being r... | 08/08/2006 |
| 7071271 | Aqueous emulsion polymerization of functionalized fluoromonomers A method is provided for aqueous emulsion co-polymerization of two or more fluoromonomers comprising the steps of: 1) forming an aqueous pre-emulsion by mixing a fluoromonomer according to formula I: F2C═CF—R1—SO2X ... | 07/04/2006 |
| 7064170 | Emulsifier free aqueous emulsion polymerization to produce copolymers of a fluorinated olefin and hydrocarbon olefin Provided is a process for making a copolymer of fluorinated olefin and hydrocarbon olefin selected from ethylene, propylene and mixtures thereof, the process comprising a substantially emulsifier free aqueous emulsion polymerization of said fluorinated olefin and sa... | 06/20/2006 |
| 7053148 | Compositions of polysiloxanes, fluoropolymers extenders Fiber materials in the form of fabrics receive, as a result of treatment with compositions according to the invention, a pleasant soft hand and excellent oil-and water-repelling properties with good permanence. The compositions can be obtained by a) preparing a solu... | 05/30/2006 |
| 7049380 | 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... | 05/23/2006 |
| 7045571 | Emulsion polymerization of fluorinated monomers The use of perfluorinated polymers and/or fluorinated ionomers as surfactant emulsifiers in emulsion polymerization of fluorinated monomers. ... | 05/16/2006 |
| 7041728 | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant The present invention provides a method of making an aqueous dispersion of non-melt processible polytetrafluoroethylene, the method comprising: (a) an aqueous emulsion polymerization of an amount of tetrafluoroethylene to produce a final amount of polytetrafl... | 05/09/2006 |
| 7026036 | Single coat non-stick coating system and articles coated with same Single coat coating systems (22), as well as articles coated with such non-stick coating systems, are provided. The single coat system includes a fluoropolymer copolymer (14a), such as fluoropolymer terpolymer including tetrafluoroethylene, hexa... | 04/11/2006 |
| 7022811 | 3,4-Alkylenedioxythiophene compounds and polymers thereof A thiophene compound represented by formula (I): wherein A represents a C1-5-alkylene bridge substituted with at least one fluorine atom and/or at least one alkyl group substituted with a fluorine-containing-... | 04/04/2006 |
| 7022773 | Fluoroelastomer compositions Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer formed of tetrafluoroethylene (TFE) homopolymers or copolymers, wherein the average particle sizes of the semicrystalline fluoropolymer latex range ... | 04/04/2006 |
| 6984697 | Fluoropolymers resistant to stress cracking The invention provides a fluorothermoplastic composition comprising interpolymerized units derived from about 94 to about 97.5 mole percent (mol %) tetrafluoroethylene (TFE), about 2 to about 3 mol % perfluoro (propyl vinyl ether) (PPVE), and about 0.5 to about 3 mo... | 01/10/2006 |
| 6956078 | Concentrated fluoropolymer dispersions An aqueous dispersion composition of about 30 to about 70 weight % non-melt-processible fluoropolymer particles having a standard specific gravity (SSG) of less than 2.225 and about 2 to about 11 weight % surfactant based on the weight of said fluoropolymer comprisi... | 10/18/2005 |
| 6908954 | Coating composition for artistic reproductions A synthetic resin containing glass beads is used as a coating for artistic reproductions to lend a realistic texture to the surface of the artistic reproduction. Surprisingly, the glass beads provide in the synthetic resin coating a canvas-like or natural feel as we... | 06/21/2005 |
| 6872324 | Aqueous dispersion An aqueous dispersion comprising a polymer (a) having a repeating unit (A) which comprises four carbon atoms connected in a linear chain and which has one double bond at the second position and a polyfluoroalkyl group bonded to an arbitrary carbon atom, and a surfac... | 03/29/2005 |
| 6869997 | Polymerization of fluoromonomers using a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant Fluoropolymers are prepared by a process comprising polymerizing at least one fluoromonomer in an aqueous reaction medium containing monomer, a radical initiator and a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant. The medium may optionally contain ... | 03/22/2005 |
| 6861466 | Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant In an aspect of the invention, a fluoropolymer dispersion, preferably a PTFE dispersion, is provided that comprises fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion has an amount of solids between 35 a... | 03/01/2005 |
| 6833418 | Dispersions containing perfluorovinyl ether homopolymers and use thereof The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether)homopolymers. The present invention further relates to a method of making an aqueous fluoropolymer dispersion comprising bicomponent particles of poly(perfluorovi... | 12/21/2004 |
| 6822059 | Dispersions containing bicomponent fluoropolymer particles and use thereof The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether) homopolymers. The present invention further relates to a method of making an aqueous fluoropolymer dispersion comprising bicomponent particles of poly(perfluorov... | 11/23/2004 |
| 6790898 | Preparation of fluorinated core-shell particles with water and oil repellency The present invention relates to preparation of fluorinated core-shell particles with water and oil repellency, and more particularly, to preparation of emulsion-type coating material with good water and oil repellency using only small amount of expensive fluorinate... | 09/14/2004 |
| 6774164 | Process for producing fluoroelastomers with fluorinated anionic surfactants A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF2CF2)n—CH2CH2SO3M, where n is an ... | 08/10/2004 |
| 6759477 | Method for preparing imides from sulfonyl fluorides This invention discloses a method for preparing imides (I) and (II) from compounds having a sulfonyl fluoride functional group. The imides so prepared are useful in a variety of catalytic and electrochemical applications. (I) or polymer comprising the unit (II) | 07/06/2004 |
