Four Or More Fluorine Atoms Patents (Class 524/546)
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Publication number: 20100305262Abstract: There is provided a fluoroelastomer characterized by containing one type or more types of fluorinated emulsifiers represented by the formula: F—(CF2)t-[O(CF2)n]m-O—(CHF)o-(CF2)p-X where m=0 to 3; n=1 to 5; o=0 to 1; p=1 to 3; t=1 to 10; and where when t=2 than o?0; and further where X is selected from a group consisting of a carboxyl acid group and a salt of a carboxylic acid group. A method for preparing fluoroelastomers by using such fluorinated emulsifiers in emulsion polymerization of fluoromonomers and articles containing such fluoroelastomers are also provided. A fluorinated elastomer dispersion including an aqueous mixture of a crosslinkable fluorinated elastomer and such fluorinated emulsifiers are also provided. The fluoroelastomers created with such fluorinated emulsifiers are essentially free of cations other than NH4+ and H+ and have a low glass transition temperature.Type: ApplicationFiled: October 10, 2008Publication date: December 2, 2010Inventors: Klaus Hintzer, Kai H. Lochhaas, Michael Jürgens, Harald Kaspar, Tilman C. Zipplies, André Streiter
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Patent number: 7842390Abstract: Chain end functionalized fluoropolymers are disclosed exhibiting good chemical reactivity high breakdown electric field (E>100 MV/m) and high dielectric constants (i.e., ?>10). The polymers can be prepared by functional initiators and from a variety of fluoromonomers including vinylidene difluoride together with one or more additional monomers. The polymers can be combined with other dielectric materials to form composites having uniform composition and morphology.Type: GrantFiled: October 3, 2006Date of Patent: November 30, 2010Assignees: The Penn State Research Foundation, Daikin America, Inc.Inventors: Tze-Chiang Chung, Zhicheng Zhang, Shangtao Chen, Katsuyoshi Kubo, Koji Kigawa
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Patent number: 7833340Abstract: To provide a coating material capable of forming a film having both a sufficiently high film strength and a photocatalytic function by an easy method, there is provided a coating material comprising a particle group A, a particle group B and a solvent, wherein the number of necking particles of the particle group A is larger than the number of necking particles of the particle group B, wherein “the number of necking particles” here is referred to the total number of particles constituting all necking particles with each constituting particle being considered as the unit particle.Type: GrantFiled: April 25, 2005Date of Patent: November 16, 2010Assignee: Showa Denko K.K.Inventors: Yasuaki Wakizaka, Masayuki Sanbayashi, Jun Tanaka
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Publication number: 20100285262Abstract: [Object] There are provided a fluorocarbon resin composite having improved abrasion resistance while nonadhesiveness, which is a feature of a fluorocarbon resin, is maintained, cookware, and a roller and a belt for use in office automation equipment. [Solving Means] A fluorocarbon resin composite includes a fluorocarbon resin layer on a base, in which a fluorocarbon resin constituting the fluorocarbon resin layer is crosslinked by electron beam irradiation, and the base has a desired shape obtained by machining. The fluorocarbon resin is composed of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer, polytetrafluoroethylene, or a mixture of the tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and polytetrafluoroethylene.Type: ApplicationFiled: June 11, 2008Publication date: November 11, 2010Applicant: SUMITOMO Electric Fine Polymer , Inc.Inventors: Kazuaki IKEDA, Nobutaka MATSUSHITA, Yoshimasa SUZUKI
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Publication number: 20100286330Abstract: A process for reducing the fluoroether carboxylic acid or salt content of aqueous fluoropolymer dispersion. The fluoroether carboxylic acid or salt employed comprises fluoroether carboxylic acid or salt having the formula below: [R1—O-L-COO?]Y+ wherein R1 is a linear, branched or cyclic partially or fully fluorinated aliphatic group which may contain ether linkages; L is a branched partially or fully fluorinated alkylene group which may contain ether linkages; and Y+ is hydrogen, ammonium or alkali metal cation. The process comprises adding stabilizer to the aqueous fluoropolymer dispersion to form a stabilized aqueous fluoropolymer dispersion and heating the stabilized aqueous fluoropolymer dispersion to decarboxylate the fluoroether carboxylic acid or salt to produce a fluoroether byproduct. At least a portion of the fluoroether byproduct is removed.Type: ApplicationFiled: May 5, 2010Publication date: November 11, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: David William Johnson, Kenneth Scott Teter
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Publication number: 20100285303Abstract: Exemplary embodiments provide a coating composition for an outermost layer of a fuser member that can include a plurality of fluorinated diamond-containing particles dispersed in a fluororesin matrix.Type: ApplicationFiled: May 6, 2009Publication date: November 11, 2010Applicant: XEROX CORPORATIONInventor: Jin WU
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Publication number: 20100285710Abstract: An article of manufacture comprises a substrate which defines the shape of the article and which comprises a sliding surface adapted for sliding over the surface of snow or over ice or over water, which sliding surface is coated with an oxidation-resistant hydrocarbon wax coating which is long lasting and renders the sliding surface near super-hydrophobic and thus lowers the sliding drag of the sliding surface on snow, ice or water over which the substrate is adapted to be slid.Type: ApplicationFiled: October 30, 2008Publication date: November 11, 2010Applicant: BRIAREOS, INC.Inventor: Franklin G. Reick
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Publication number: 20100285304Abstract: Exemplary embodiments provide a coating composition for an outermost layer of a fuser member that can include a plurality of fluorinated diamond-containing particles dispersed in an elastomeric matrix.Type: ApplicationFiled: May 6, 2009Publication date: November 11, 2010Applicant: XEROX CORPORATIONInventor: Jin WU
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Patent number: 7820775Abstract: The invention provides a TFE polymer capable of providing stretched materials excellent in membrane homogeneity. The present invention is related to a tetrafluoroethylene polymer having stretchability and non-melt-processability and having a standard specific gravity of 2.140 to 2.165, wherein, with regard to the heat-of-fusion curve obtained by subjecting the tetrafluoroethylene polymer in the form of an unbaked polymer to be measured having no history of being heated to a temperature of 300° C. or higher to differential scanning calorimetry at a programming rate of 2° C./minute, the ratio S2/S1 is not lower than 0.90.Type: GrantFiled: April 13, 2007Date of Patent: October 26, 2010Assignee: Daikin Industries, Ltd.Inventors: Shunji Kasai, Makoto Ono, Taku Yamanaka, Yasuhiko Sawada
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Patent number: 7812081Abstract: Method for making a mixture used in the production of a polytetrafluoroethylene (PTFE) membrane including porous inorganic materials. The mixture includes PTFE resin, a lubricating agent, and a porous inorganic material. The mixture may be further processed to form a PTFE membrane.Type: GrantFiled: February 26, 2008Date of Patent: October 12, 2010Assignee: General Electric CompanyInventor: Gopakumar Thottupurathu
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Publication number: 20100247913Abstract: There are provided novel crosslinked fluorine-containing elastomer fine particles, a process for preparing crosslinked fluorine-containing elastomer fine particles and a resin composition comprising the same. The crosslinked fluorine-containing elastomer fine particles are crosslinked fluorine-containing elastomer fine particles having a gel fraction of not less than 85% by mass or crosslinked fluorine-containing elastomer fine particles obtained by crosslinking fluorine-containing elastomer particles having at least three iodine atoms per one polymer molecule at an end thereof. The composition is one comprising those fine particles and a synthetic resin.Type: ApplicationFiled: May 2, 2008Publication date: September 30, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hideto Nakagawa, Haruhiko Mohri, Hirokazu Aoyama, Junpei Terada, Rumi Takeuchi
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Publication number: 20100248324Abstract: A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.Type: ApplicationFiled: March 24, 2009Publication date: September 30, 2010Inventors: Ping Xu, Jack J. Hegenbarth, Xin Kang Chen
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Patent number: 7790794Abstract: A composition for aqueous coating material which has a low content of an organic solvent and presents little burden on the environment and which is excellent in storage stability. A composition for aqueous coating material, which comprises a synthetic resin containing a fluorinated copolymer comprising from 40 to 60 mol % of a fluoro-olefin unit, from 3 to 50 mol % of an alkyl vinyl ether or alkyl vinyl ester unit, from 4 to 30 mol % of a hydroxyl group-containing vinyl ether unit and 0.Type: GrantFiled: October 9, 2008Date of Patent: September 7, 2010Assignee: Asahi Glass Company, LimitedInventors: Naoko Sumi, Takashi Morizumi, Isao Kimura
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Publication number: 20100222495Abstract: The invention relates to the field of chemistry and relates to long-term stable oil PTFE dispersions, such as can be used, for example, in transmissions or bearings, and a method for the production thereof. The object of the present invention is therefore to disclose a long-term stable oil PTFE dispersion as well as a simple and cost-effective method for the production thereof. The object is attained with an oil PTFE dispersion comprising PTFE particles and a monoolefinically or polyolefinically unsaturated oil, wherein molecules of the olefinically unsaturated oil are covalently/chemically coupled to PTFE (primary) particle surfaces via radical reactions, and wherein a permanent charge separation between the PTFE particle surfaces and the coupled oil molecules is present and a fine dispersion of the PTFE particles in the oil or oil mixture is present.Type: ApplicationFiled: December 9, 2008Publication date: September 2, 2010Applicant: LEIBNIZ-INSTITUT FUER POLYMERFORSCHUNG DRESDEN E.V.Inventor: Dieter Lehmann
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Publication number: 20100222491Abstract: The present invention has an object to provide an aqueous fluoropolymer dispersion which is excellently prevented from foaming without significant impairment in viscosity and in mechanical stability. The present invention is related to an aqueous fluoropolymer dispersion comprising a particle of fluoropolymer as dispersed in an aqueous medium in the presence of a specific nonionic surfactant, wherein the specific nonionic surfactant comprises a compound having an average total hydrophilic group content of 45 to 90% by mass, each hydrocarbon group in the compound constituting the specific nonionic surfactant is only a hydrocarbon group of 1 to 5 consecutively neighboring carbon atoms, and the fluorinated surfactant in the aqueous fluoropolymer dispersion amounts to 500 ppm or less of the solid matter of the fluoropolymer.Type: ApplicationFiled: December 28, 2006Publication date: September 2, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Chie Sawauchi, Nobuhiko Tsuda, Toshirou Miura
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Publication number: 20100222494Abstract: There is provided an aqueous dispersion comprising fluorine-containing composite polymer particles which, even when an amount of a fluorine-containing polymer is smaller than that of conventional fluorine-containing polymer, makes it possible to obtain characteristics of the fluorine-containing polymer equal to or superior to those of conventional fluorine-containing polymer, and a process for preparing the aqueous dispersion. The process, which is used for preparing an aqueous dispersion comprising fluorine-containing composite polymer particles, is characterized by subjecting the polymer solution obtained by dissolving the fluorine-containing polymer (A) in the monomer (b) having an ethylenically unsaturated group to emulsion polymerization.Type: ApplicationFiled: August 1, 2006Publication date: September 2, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Katsuhiko Imoto, Tsunehiko Fuwa
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Patent number: 7776946Abstract: The present invention provides an aqueous emulsion polymerization of fluorinated monomers including gaseous fluorinated monomers using a perfluoro ether surfactant as an emulsifier. The perfluoro ether surfactants correspond to formula (I) Rf—O—CF2CF2—X??(I) wherein Rf represents a linear or branched perfluoroalkyl group having 1, 2, 3 or 4 carbon atoms and X represents a carboxylic acid group or salt thereof. In a further aspect, the invention also provides an aqueous fluoropolymer dispersion comprising the perfluoro ether surfactant and the use of such dispersion in the coating or impregnation of substrates.Type: GrantFiled: July 14, 2006Date of Patent: August 17, 2010Assignee: 3M Innovative Properties CompanyInventors: Klaus Hintzer, Harald Kaspar, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies
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Publication number: 20100204345Abstract: The present invention provides an aqueous dispersion of a low-molecular-weight polytetrafluoroethylene (PTFE), which contains an easily removable surfactant, and has a good dispersion stability. Specifically, the present invention provides an aqueous dispersion of a low-molecular-weight PTFE comprising tetrafluoroethylene (TFE) units, or TFE units and modifying monomer units which are copolymerizable with the TFE units, wherein the aqueous dispersion contains from 70 to 9,000 ppm, based on the aqueous dispersion, of a fluorine-containing compound of the formula (1) below: X—(CF2)m—Y??(1) where X is H or F; m is an integer from 3 to 5; and Y is —SO3M, —SO4M, —SO3R, —SO4R, —COOM, —PO3M2 or —PO4M2, M being H, NH4 or an alkali metal, and R being an alkyl group having 1 to 12 carbons, and the low-molecular-weight PTFE has an average primary particle size of from 100 to 350 nm.Type: ApplicationFiled: August 7, 2008Publication date: August 12, 2010Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Taku Yamanaka, Nobuhiko Tsuda, Masayuki Tsuji, Yasuhiko Sawada
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Publication number: 20100203310Abstract: There are provided a fluororesin thin film which is composed of a fluororesin, which has a thickness of 20 ?m or less and a Gurley's number of 300 seconds or more, and which includes no defects, such as voids and/or cracks; a method for manufacturing the fluororesin thin film in which after a fluororesin dispersion including a dispersing medium and a fluororesin powder dispersed therein is applied on a flat and smooth foil, the dispersing medium is dried, and the fluororesin powder is sintered; the fluororesin dispersion; a fluororesin composite including a porous base material and the fluororesin thin film; a manufacturing method thereof a porous fluororesin composite formed by stretching the fluororesin composite; and a separation membrane element using the porous fluororesin composite.Type: ApplicationFiled: August 6, 2007Publication date: August 12, 2010Applicant: Sumitomo Electric Fine Polymer, Inc.Inventors: Fumihiro Hayashi, Itsumu Furumoto, Shinichi Kanazawa, Kazuaki Ikeda, Tooru Morita, Hajime Funatsu
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Patent number: 7772311Abstract: A composition is provided that is applicable for providing a non-stick abrasion-resistant coating on a surface, but not as a primer layer, said composition comprising fluoropolymer and an effective amount of ceramic particles having an average size of at least about 10 micrometers to improve the abrasion resistance of said coating on said surface by at least 10% as determined by the dry SBAR method, said composition optionally containing adhesion promoter in an amount up to about 10 wt % of the wt. of said fluoropolymer.Type: GrantFiled: March 23, 2007Date of Patent: August 10, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Jerome T. Adams, Osamu Hayakawa, Michael J. Witsch
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Patent number: 7767745Abstract: Method for making a mixture used in the production of a polytetrafluoroethylene (PTFE) membrane including metal oxide(s). The mixture includes PTFE resin, a lubricating agent, and a metal oxide. The mixture may be further processed to form a PTFE membrane.Type: GrantFiled: February 26, 2008Date of Patent: August 3, 2010Assignee: General Electric Co.Inventor: Gopakumar Thottupurathu
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Patent number: 7763680Abstract: Core/shell polymer is provided wherein the core comprises non-melt flowable PTFE and the shell comprises melt-fabricable perfluoropolymer, the core/shell polymer providing a thixotropic melt blend and improved physical properties as compared to the melt-fabricable perfluoropolymer by itself.Type: GrantFiled: November 16, 2006Date of Patent: July 27, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Ralph Munson Aten, Heidi Elizabeth Burch, Sundar Kilnagar Venkataraman
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Patent number: 7754836Abstract: Disclosed is a water- and oil-repellent agent comprising the following fluorine-containing copolymer (A). The fluorine-containing copolymer (A) comprises: (a1) a fluoroalkyl group-containing polymerizable monomer of the formula: wherein Y is a divalent organic group [for example, an aliphatic group having 1 to 10 carbon atoms, an aromatic or cycloaliphatic group having 6 to 10 carbon atoms, a —SO2N(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), a —CON(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), or a —CH2CH(OY1)CH2— group (in which Y1 is a hydrogen atom or an acyl group having 1 to 4 carbon atoms)]; and Rf is a linear or branched fluoroalkyl or fluoroalkenyl group having 1 to 6 carbon atoms; and (a2) vinylidene chloride.Type: GrantFiled: August 30, 2006Date of Patent: July 13, 2010Assignee: Daikin Industries, Ltd.Inventor: Masato Kashiwagi
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Publication number: 20100154680Abstract: The present invention relates to pigment granules which contain inorganic filter aids and a process for the production thereof and their use for colouring lime- and/or cement-bound building materials, asphalt, paints, finishes, paper or plastics.Type: ApplicationFiled: August 20, 2009Publication date: June 24, 2010Applicant: LANXESS DEUTSCHLAND GMBHInventors: Holger Friedrich, Herbert Kunstmann, Krzysztof Chlopek, Jüergen Kischkewitz
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Publication number: 20100160510Abstract: A process for making an aqueous dispersion of fluoropolymer particles by polymerizing in a first polymerization step at least one fluorinated monomer having an ionic group in an aqueous polymerization medium in the presence of initiator, the polymerizing providing dispersed particulate of fluorinated ionomer, and polymerizing in a second polymerization step at least one fluorinated monomer in the aqueous polymerization medium in the presence of the dispersed particulate of fluorinated ionomer and initiator to form the aqueous dispersion of particles of fluoropolymer.Type: ApplicationFiled: December 18, 2009Publication date: June 24, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Ralph Munson Aten, Kenneth Wayne Leffew, Ralph Birchard Lloyd, Charles Joseph Noelke
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Patent number: 7732531Abstract: The present invention provides a molded article comprising a polytetrafluoroethylene resin (A) and a thermoplastic resin (B) having a melting point of not lower than 100° C. but lower than 322° C., wherein the maximum peak temperature of the endothermic curve appearing on the crystal melting curve of the above polytetrafluoroethylene resin (A) as measured by a differential scanning calorimeter is higher by at least 3° C. than the maximum peak temperature of the endothermic curve appearing on the crystal melting curve of the above polytetrafluoroethylene resin (A) after heating to a temperature of not lower than 340° C. as measured by the differential scanning calorimeter.Type: GrantFiled: August 25, 2004Date of Patent: June 8, 2010Assignee: Daikin Industries, Ltd.Inventors: Hiroyuki Yoshimoto, Yasuhiko Sawada, Shunji Kasai, Shuji Tagashira
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Patent number: 7728098Abstract: Fluorochemical oligomeric silanes, compositions comprising such silanes and/or the condensation products of such silanes, and coatings produced with such compositions.Type: GrantFiled: July 27, 2006Date of Patent: June 1, 2010Assignee: 3M Innovative Properties CompanyInventors: Rudolf J. Dams, Zai-Ming Qiu
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Publication number: 20100120972Abstract: Disclosed is a thermoplastic composite composition including at least one semi-aromatic polyamide; a surface-treated carbon fiber having an aromatic sizing; optionally, from 0 to about 25 wt % PTFE; wherein the surface-treated carbon fiber has less than 1.0 wt % weight loss at 380° C., as measured by thermo-gravimetric analysis in air at 10° C./min.Type: ApplicationFiled: November 5, 2009Publication date: May 13, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Shengmei Yuan
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Patent number: 7714047Abstract: The present invention provides a method of producing a fluoropolymer aqueous dispersion by which the fluorine-containing emulsifier contained in the fluoropolymer aqueous dispersion as obtained after polymerization can be efficiently removed as well as a fluoropolymer aqueous dispersion low in fluorine-containing emulsifier concentration. The present invention is a method of producing a fluoropolymer aqueous dispersion which comprises carrying out a concentration treatment comprising a concentration operation of a pretreatment fluoropolymer aqueous dispersion, wherein the pretreatment fluoropolymer aqueous dispersion is obtained by carrying out a polymerization in an aqueous medium in the presence of a fluorine-containing surfactant (A), the fluorine-containing surfactant (A) is a fluorine-containing surfactant having an octanol/water partition coefficient of 1.5 to 3.5.Type: GrantFiled: June 1, 2009Date of Patent: May 11, 2010Assignee: Daikin Industries, Ltd.Inventors: Nobuhiko Tsuda, Chie Sawauchi, Yasuhiko Sawada, Tetsuo Shimizu
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Publication number: 20100113680Abstract: An aqueous fluoropolymer dispersion comprising an aqueous medium, fluoropolymer particles, and an amine oxide surfactant. Coagulated fluoropolymer resin is produced from the dispersion by adding an acidic reagent in sufficient amount to cause coagulation and separation of the coagulated fluoropolymer resin from the aqueous medium. Another particulate component such as particular polymer, filler, pigment, solid lubricant, etc., may be added to the dispersion and co-coagulated to form a mixture of coagulated fluoropolymer resin and particulate component.Type: ApplicationFiled: January 15, 2010Publication date: May 6, 2010Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventor: Clay Woodward Jones
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Publication number: 20100110609Abstract: The present invention relates to a highly dielectric film formed by using (A) a fluorine-containing resin comprising vinylidene fluoride unit and tetrafluoroethylene unit in a total amount of not less than 95% by mole, and provides a film for a film capacitor which has high dielectric property and high withstanding voltage and can be made thin.Type: ApplicationFiled: January 24, 2008Publication date: May 6, 2010Inventors: Meiten Koh, Kouji Yokotani, Miharu Matsumura, Eri Mukai, Nobuyuki Komatsu
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Publication number: 20100104845Abstract: The present invention provides sintered composite polymeric materials and methods of making and using the same. The sintered composite polymeric materials are made by sintering composite particles comprising a polytetrafluoroethylene component and a carbonaceous component, wherein the carbonaceous component is dispersed throughout the polytetrafluoroethylene component.Type: ApplicationFiled: October 23, 2009Publication date: April 29, 2010Applicant: Porex CorporationInventors: Andrew James MacLennan, Tripp Augustus Avett, Xingguo Li, Guoqiang Mao
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Patent number: 7705074Abstract: A process comprising polymerizing at least one fluorinated monomer in an aqueous medium containing initiator and polymerization agent to form an aqueous dispersion of particles of fluoropolymer, the polymerization agent comprising: fluoropolyether acid or salt thereof having a number average molecular weight of at least about 800 g/mol; and fluorosurfactant having the formula: [R1—On-L-A?] Y+ wherein: R1 is a linear or branched partially or fully fluorinated aliphatic group which may contain ether linkages; n is 0 or 1; L is a linear or branched alkylene group which may be nonfluorinated, partially fluorinated or fully fluorinated and which may contain ether linkages; A? is an anionic group selected from the group consisting of carboxylate, sulfonate, sulfonamide anion, and phosphonate; and Y+ is hydrogen, ammonium or alkali metal cation; with the proviso that the chain length of R1—On-L- is not greater than 6 atoms.Type: GrantFiled: November 9, 2007Date of Patent: April 27, 2010Assignee: E. I. du Pont de Nemours and CompanyInventors: Paul Douglas Brothers, Subhash Vishnu Gangal
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Patent number: 7705085Abstract: A composition includes an elastomeric composition. The elastomeric composition can include a fluoroelastomer composition, and the elastomeric composition is substantially free of an epichlorohydrin composition. The composition can further include a filler material which includes a reinforcement-grade carbon black. The composition can further include a peroxide curative.Type: GrantFiled: April 6, 2007Date of Patent: April 27, 2010Assignee: 3M Innovative Properties CompanyInventor: Pradip K. Bandyopadhyay
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Publication number: 20100092759Abstract: The invention describes a particulate filled film, useful as a backsheet for a photovoltaic construct.Type: ApplicationFiled: October 9, 2009Publication date: April 15, 2010Inventors: Hua Fan, Keith C. Hong, Gurkirat S. Sekhon, Karen Conley, Julia DiCorleto Gibson
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Patent number: 7696268Abstract: The present invention provides a method of producing a fluoropolymer aqueous dispersion by which the fluorine-containing emulsifier contained in the fluoropolymer aqueous dispersion as obtained after polymerization can be efficiently removed as well as a fluoropolymer aqueous dispersion low in fluorine-containing emulsifier concentration. The present invention is a method of producing a fluoropolymer aqueous dispersion which comprises carrying out a concentration treatment comprising a concentration operation of a pretreatment fluoropolymer aqueous dispersion, wherein the pretreatment fluoropolymer aqueous dispersion is obtained by carrying out a polymerization in an aqueous medium in the presence of a fluorine-containing surfactant (A), the fluorine-containing surfactant (A) is a fluorine-containing surfactant having an octanol/water partition coefficient of 1.5 to 3.5.Type: GrantFiled: October 29, 2004Date of Patent: April 13, 2010Assignee: Daikin Industries, Ltd.Inventors: Nobuhiko Tsuda, Chie Sawauchi, Yasuhiko Sawada, Tetsuo Shimizu
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Patent number: 7691936Abstract: Fine fluoropolymer powders substantially fluorinated surfactant free, in particular fluorinated ionic surfactants, preferably perfluorooctanoic acid or its salts, comprising an anionic polyelectrolyte.Type: GrantFiled: July 18, 2006Date of Patent: April 6, 2010Assignee: Solvay Solexis S.p.A.Inventors: Marco Malvasi, Stefano Ferrero, Valeri Kapeliouchko
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Publication number: 20100081747Abstract: The present invention provides a polymer composition wherein inorganic particles are uniformly dispersed at the nano level in the polymer without having said inorganic particles being surface-treated. It further provides a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer; and the polymer composition which is obtained by said method.Type: ApplicationFiled: September 29, 2006Publication date: April 1, 2010Inventors: Pham H. Nam, Jeong Chang Lee
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Patent number: 7683118Abstract: A process for preparing a fluoropolymer dispersion that is substantially anionic fluorinated surfactant free includes adding to a fluoropolymer dispersion a nonionic surfactant having a cloud point (CP) between 40 and 80° C. in a concentration of 1.5% to 50% by weight of the fluoropolymer, heating the dispersion up to a temperature Tc in a range of CP±10°C., decanting the dispersion in a reactor at Tc until obtaining a lower aqueous phase containing a concentrated fluoropolymer dispersion and an upper aqueous phase substantially not containing the fluoropolymer dispersion, washing the decanted dispersion with a solution of water and nonionic surfactant having a concentration of the nonionic surfactant of 0.5% to 50% by weight of the fluoropolymer, removing the upper aqueous phase from the upper part of the reactor, and discharge and recovery of the fluoropolymer dispersion.Type: GrantFiled: April 19, 2006Date of Patent: March 23, 2010Assignee: Solvay Solexis S.p.A.Inventors: Alberto Mirigliani, Evasio Deregibus, Valeri Kapeliouchko
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Patent number: 7678859Abstract: Provided is a method comprising polymerizing at least one fluorinated monomer in an aqueous emulsion polymerization in the presence of a carbosilane surfactant having at least one hydrophobic part, wherein the hydrophobic part has at least one silicon atom, and having at least one hydrophilic part, with the proviso that the carbosilane contains no Si—O bonds.Type: GrantFiled: September 14, 2006Date of Patent: March 16, 2010Assignee: 3M Innovative Properties CompanyInventors: Peter Bissinger, Michael C. Dadalas, Klaus Hintzer, Ludwig Mayer, Werner Schwertfeger, Tilman C. Zipplies
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Patent number: 7671123Abstract: A fluororesin aqueous dispersion comprising from 20 to 70 mass % of microparticles of a fluororesin and from 1 to 12 mass %, based on the mass of the fluororesin, of a non-ionic surfactant represented by the formula (1): R1—O-A-X??(1) wherein R1 is a C6-18 alkyl group, O is an oxygen atom, A is a polyoxyalkylene group comprising from 1 to 3 oxybutylene groups and from 5 to 20 oxyethylene groups, and X is a hydrogen atom or a methyl group.Type: GrantFiled: July 12, 2007Date of Patent: March 2, 2010Assignee: Asahi Glass Company, LimitedInventors: Jun Hoshikawa, Shinya Higuchi, Yasuhiko Matsuoka, Nobuyuki Yamagishi
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Patent number: 7671112Abstract: A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO?]iXi+??(I) wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.Type: GrantFiled: May 25, 2006Date of Patent: March 2, 2010Assignee: 3M Innovative Properties CompanyInventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Koenigsmann, Kai Helmut Lochhaas, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies, Ludwig Mayer, Michael C. Dadalas, George G. I. Moore, Jay F. Schulz, Richard M. Flynn
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Publication number: 20100047498Abstract: Crosslinkable perfluoroelastomer compositions having low metal content and low compression set when crosslinked, and processes for producing the same, are provided. Compositions comprising terpolymers of TFE, PAVE, and CNVE having a metal content of less than 3000 ppb may be formed into high purity transparent perfluoroelastomer parts.Type: ApplicationFiled: December 31, 2008Publication date: February 25, 2010Inventors: Ping Xu, Jack Hegenbarth, Xing Kang Chen, Jian Hou
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Patent number: 7666949Abstract: A curative composition comprising a cation and an anion of the formula Anq?Qpm+, wherein m, n, p, and q are positive integers, wherein m*p=n*q, wherein Qm+ is an organo onium, and Aq? is an anion, provided that at least one Aq? is selected from the formula: wherein each R independently is H, halo, alkyl, aryl, aralkyl, or cycloalkyl, and which also may be halogenated, fluorinated, or perfluorinated, wherein two or more of R and R? groups may together form a ring, wherein each R group independently may contain one or more heteroatom(s), wherein R? can be the same as R, with the proviso that R? cannot be halo. Also provided are a fluoropolymer composition including this curative, a method of making a fluoropolymer, and fluoropolymer articles containing curable or cured fluoropolymer compositions.Type: GrantFiled: June 13, 2008Date of Patent: February 23, 2010Assignee: 3M Innovative Properties CompanyInventors: Werner M. A. Grootaert, Eric W. Adair, Miguel A. Guerra
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Patent number: 7662886Abstract: Processable rubber compositions contain a vulcanized elastomeric material dispersed in a matrix of a thermoplastic polymeric material. The vulcanized elastomeric material is a peroxide cure polymeric material containing repeating units derived from fluorine-containing monomers and at least one peroxide cure site monomer. In one embodiment the matrix forms a continuous phase and the vulcanized elastomeric material is in the form of particles forming a non-continuous phase. The compositions are made by combining a radical curing system, a fluorocarbon elastomer material, and a fluoroplastic material, and heating the mixture at a temperature and for a time sufficient to effect vulcanization of the elastomeric material, while mechanical energy is applied to mix the mixture during the heating step. Shaped articles may be readily formed from the rubber compositions according to conventional thermoplastic processes such as blow molding, injection molding, and extrusion.Type: GrantFiled: September 30, 2008Date of Patent: February 16, 2010Assignee: Freudenberg-NOK General PartnershipInventor: Edward Hosung Park
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Patent number: 7659333Abstract: The present invention provides a fluorinated surfactant having the general formula: [Rf—(O)t—CQH—CF2—O]n—R—G??(I) wherein Rf represents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, Q is CF3 or F, R is an aliphatic or aromatic hydrocarbon group, G represents a carboxylic or sulphonic acid or salt thereof, t is 0 or 1 and n is 1, 2 or 3. The surfactant is particularly useful in polymerizing fluorinated monomers in an aqueous emulsion polymerization.Type: GrantFiled: November 21, 2006Date of Patent: February 9, 2010Assignee: 3M Innovative Properties CompanyInventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Königsmann, Kai Helmut Lochhaas, Andreas R. Maurer, Tilman C. Zipplies, Richard M. Flynn
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Patent number: 7655722Abstract: The present invention relates to adhesive compositions having: a phosphate group-containing monomer (a) having a fluorocarbon group represented by Chemical Formula 1; and a solvent (b), where R is a hydrogen atom or a methyl group, n, p and q are natural numbers 2?n?10, p+q?n and p+q+n?13.Type: GrantFiled: April 13, 2006Date of Patent: February 2, 2010Assignee: Kuraray Medical Inc.Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki, Mitsunobu Kawashima
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Publication number: 20100004374Abstract: Creep resistant fluoropolymer is made by blending a melt-fabricable fluoropolymer having a melt flow rate of no greater than about 7 g/10 min with milled carbon fiber and forming the resultant blend into an article, the carbon fiber content of the blend being from about 15 to 35 wt % based on the combined weight of the carbon fiber and the fluoropolymer.Type: ApplicationFiled: June 11, 2009Publication date: January 7, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Jacob Lahijani
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Publication number: 20100004373Abstract: Coating compositions for producing hydrophobic or super-hydrophobic surfaces and olephobic or super-olephobic surfaces, and to processes for producing such surfaces. In particular, the present invention relates to hydrophobic or olephobic powder coatings and their use for transforming surfaces of articles into hard-to-wet and self-cleaning surfaces.Type: ApplicationFiled: July 2, 2008Publication date: January 7, 2010Inventors: Jingxu Zhu, Hui Zhang
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Patent number: 7625974Abstract: A non-dripping, flame retardant, fluoropolymeric composition comprising: (a) a fluoropolymeric base polymer; (b) at least one char forming agent; and (c) a compatibilizer agent. The fluoropolymeric base polymer is preferably selected from the group consisting of PVDF (polyvinylidene fluoride), ECTFE, poly-ethylene chlorotrifluoroethylene, and ETFE poly-ethylene tetrafluoroethylene. Such compositions are especially useful for appliance wire, aerospace/military wire, cable raceways, blown fiber tubes, fire alarm cables, circuit integrity cables, fiber optic distribution cables & breakout components, heat tracing cable jacket, stage lighting cable, industrial cable, shipboard cable (military & passenger), shielded cable jackets.Type: GrantFiled: September 29, 2006Date of Patent: December 1, 2009Assignee: AlphaGary CorporationInventors: Mark A. Jozokos, Yevgeniy I. Globus