Patents Examined by Henry S. Hu
  • Ultraviolet and vacuum ultraviolet transparent polymer compositions and their uses
    Patent number: 6824930
    Abstract: Disclosed are partially fluorinated and fully fluorinated polymers that are substantially transparent to ultraviolet radiation at wavelengths from 140 to 186 nanometers.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: November 30, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Clayton Wheland, Roger Harquail French, Fredrick Claus Zumsteg, Jr.
  • Process for producing a tetrafluoroethylene polymer excellent in strength
    Patent number: 6822060
    Abstract: A process for producing a tetrafluoroethylene polymer, which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a dispersant, a stabilizer and a polymerization initiator, wherein the polymerization initiator is a redox polymerization initiator comprising a halogen acid salt YXO3/a sulfite Z2SO3 wherein X is a chlorine atom, a bromine atom or an iodine atom, Y is a hydrogen atom, ammonium, an alkali metal or an alkaline earth metal, and Z is ammonium, an alkali metal or an alkaline earth metal. By this process, it is possible to obtain a tetrafluoroethylene polymer which is suitable for a stretching operation after paste extrusion.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: November 23, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeki Kobayashi, Jun Hoshikawa, Kazuo Kato, Hiroki Kamiya, Hiroyuki Hirai
  • Dispersions containing bicomponent fluoropolymer particles and use thereof
    Patent number: 6822059
    Abstract: 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(perfluorovinyl ether) homopolymers and a second fluoropolymer. The dispersions of the present invention may be used for rendering fibrous substrates oil repellent, water repellent and/or stain repellent without altering the looks and feel of the substrate.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: November 23, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Richard S. Buckanin, Lian S. Tan, E. Steven McAlister
  • Inorganic metal oxide/organic polymer nanocomposites and method thereof
    Patent number: 6818081
    Abstract: A synthetic method for preparation of hybrid inorganic/organic energetic nanocomposites is disclosed herein. The method employs the use of stable metal in organic salts and organic solvents as well as an organic polymer with good solubility in the solvent system to produce novel nanocomposite energetic materials. In addition, fuel metal powders (particularly those that are oxophilic) can be incorporated into composition. This material has been characterized by thermal methods, energy-filtered transmission electron microscopy (EFTEM), N2 adsoprtion/desorption methods, and Fourier-Transform (FT-IR) spectroscopy. According to these characterization methods the organic polymer phase fills the nanopores of the material, providing superb mixing of the component phases in the energetic nanocomposite.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: November 16, 2004
    Assignee: The Regents of the University of California
    Inventors: Alexander E. Gash, Joe H. Satcher, Randy Simpson
  • Process for producing fluoropolymers having a reduced amount of polar end groups
    Patent number: 6812310
    Abstract: A fluoropolymer having a reduced amount of polar end groups. The fluoropolymer is produced by free radical polymerization of fluorinated monomers and the initiation of the polymerization is carried out in the presence of a chloride salt. Polar end groups include hydroxy groups and ionized or ionizable end groups. Examples of ionized or ionizable end groups include acid groups and salts thereof such as sulfonic acid and salts thereof, —CH2—OSO3H groups, sulfates and carbonyl containing end groups such as carboxylic and carboxylate groups. Due to the presence of chloride salt at the initiation of the free radical polymerization, CF2Cl end groups are formed instead of the polar end groups. As a result, a fluoropolymer is obtained that has improved processibility and heat resistance.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: November 2, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Werner M. A. Grootaert, Klaus Hintzer, Bernhard Hirsch, Harald Kaspar, Gernot Löhr, Franz März, Guy Van Gool
  • Amorphous perfluorinated copolymers
    Patent number: 6809166
    Abstract: Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties: substantial absence of unstable polar end groups, polymer Tg higher than 120° C., narrow monomeric composition distribution.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: October 26, 2004
    Assignee: Solvay Solexis S.p.A.
    Inventors: Marco Apostolo, Francesco Triulzi, Vincenzo Arcella, Vito Tortelli, Pierangelo Calini
  • Tetrafluoroethylene thermoprocessable copolymer microspheres
    Patent number: 6809167
    Abstract: Tetrafluoroethylene (TFE) thermoprocessable copolymer microspheres having a substantially spherical shape for at least 95% by weight, the average size of the microspheres being in the range 25 &mgr;m and 2 mm, the bulk density being in the range 0.5 and 1.1 g/cm3.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: October 26, 2004
    Assignee: Ausimont S.p.A.
    Inventors: Hua Wu, Francesco Morandi
  • Aqueous dispersion of fluorocopolymer
    Patent number: 6806333
    Abstract: An aqueous dispersion of a fluorocopolymer, which is excellent in stability and film-forming properties as an aqueous dispersion, and which gives a coating film excellent in mechanical strength and improved in transparency, water resistance and stain resistance. A stable aqueous dispersion of a fluorocopolymer obtained in such a manner that a fluorocopolymer comprising polymerized units based on a vinyl monomer having a reactive group as the base is subjected to a composite treatment or a mixing treatment with a (meth)acrylate containing a reactive group capable of forming a bond by reaction with the above reactive group or the like.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: October 19, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Toru Ishida, Naomi Ichikuni
  • Process for producing a tetrafluoroethylene polymer having high strength
    Patent number: 6803437
    Abstract: A process for producing a tetrafluoroethylene polymer, which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a water-soluble initiator, wherein the water used for the polymerization is regulated to have a TOC of 100 ppb or lower and/or an electrical conductivity of 1.0 &mgr;S/cm or lower. When this process for producing a tetrafluoroethylene polymer is employed, a decrease or fluctuation in the polymerization rate during the polymerization of tetrafluoroethylene will be minimal, and a deterioration in the physical properties of the obtained tetrafluoroethylene polymer will be minimal.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: October 12, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeki Kobayashi, Jun Hoshikawa, Kazuo Kato, Hiroki Kamiya, Hiroyuki Hirai
  • Fluorine-containing compounds and polymers derived therefrom
    Patent number: 6800788
    Abstract: Provided are fluorine-containing compounds, and polymers derived therefrom, for use in compositions used for treating textile substrates. Also provided are methods of making fluorine-containing compounds and polymers derived therefrom, compositions comprising the compounds and/or polymers of the present invention, methods of treating substrates, and the treated products derived therefrom.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: October 5, 2004
    Assignee: Honeywell International Inc.
    Inventors: David Bradley, Jing Ji Ma, Haridasan K. Nair, David Nalewajek, Leonard M. Stachura, George Samuels, Michael Van Der Puy
  • Process for producing a coating film and process for producing a solid polymer electrolyte fuel cell
    Patent number: 6797316
    Abstract: A process for producing a coating film consisting of a single coating layer or a plurality of coating layers laminated, which comprises a coating operation of relatively moving at least one of a die for discharging a coating liquid containing short fibrous fillers from a linear opening with a predetermined length and a substrate for coating, on which the coating liquid discharged from the die is coated, to form a coating layer on the substrate for coating, wherein the direction in the coating operation includes at least two different angle directions with regard to the single coating layer or the plurality of coating layers of the coating film.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: September 28, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Shinji Kinoshita, Hiroshi Shimoda, Atsushi Mukoyama
  • Process for producing a tetrafluoroethylene polymer
    Patent number: 6794470
    Abstract: A tetrafluoroethylene polymer is produced by polymerizing tetrafluoroethylene in the presence of an aqueous medium and a polymerization initiator, wherein the content of impurities (e.g. a saturated compound such as CH2F2 or CHF3 and an unsaturated compound such as CF2═CFH, CF2═CH2, CF2═CFCl or CF2═CHCl) in the tetrafluoroethylene is not more than 100 ppm. By this method, PTFE which is uniform and stretchable at a high stretch ratio and which is excellent in the fibrillation property and has a high break strength, can be obtained.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: September 21, 2004
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeki Kobayashi, Jun Hoshikawa, Kazuo Kato, Hiroki Kamiya, Hiroyuki Hirai
  • Coagents for fluoroelastomer free radical-curable compositions
    Patent number: 6794455
    Abstract: Crosslinking coagents based on aromatic diimides having N-substituted allyl groups are employed in place of triallyl isocyanurate (TAIC) for the free radical curing of fluoroelastomers. The diimide coagents mix more easily with fluoroelastomers and are less likely to homopolymerize than TAIC. Thus mold fouling and sticking due to low molecular weight polymers of coagent is greatly reduced.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: September 21, 2004
    Assignee: DuPont Dow Elastomers
    Inventor: Ming-Hong Hung
  • Process for obtaining non thermoprocessable fine powders of homopolymer or modified PTFE
    Patent number: 6790932
    Abstract: A process for obtaining non thermoprocessable fine powders of homopolymer or modified PTFE, comprising the following steps: A) obtaining of the polymer latex under the gel form; B) washing of the polymer gel with acid aqueous solutions or neutral aqueous solutions; C) granulation of the gel washed by mechanical stirring, at a specific power in the range 1.5-10 kW/m3, until flotation of the PTFE fine powder, and separation of the floated fine powder; D) drying in an aerated oven of the floated fine powder at a drying temperature in the range 90° C.-160° C.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: September 14, 2004
    Assignee: Ausimont S.p.A.
    Inventors: Valery Kapeliouchko, Hua Wu, Giovanna Palamone
  • Fiber-treating agent, glass fiber and rubber product both made with the fiber treating agent
    Patent number: 6790901
    Abstract: A glass fiber containing a fiber processing agent for increasing the surface strength of a rubber product, such as a rubber belt or a tire, and a rubber product containing the glass fiber. The fiber processing agent is comprised of a dispersion solution having a 2-component dispersoid including a rubber latex and an epoxy resin. By using the 2-component dispersoid solution comprised of the epoxy resin, which has excellent strength and also has excellent heat resistance and water resistance, and the rubber latex, which is flexible, a glass fiber and a rubber product can be obtained having greatly increased durability, without bringing about a drop in quality, even under a poor environment.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: September 14, 2004
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventor: Satoru Kawaguchi
  • Aqueous crumb rubber composition
    Patent number: 6790897
    Abstract: A fluid or semifluid additive composition useful for asphalt paving comprises between about 10% and about 50% crumb rubber, about 10% and about 50% petroleum hydrocarbon having at least about 50% aromatics, between about 10% and about 50% surface active clay, and water, by weight.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: September 14, 2004
    Assignee: Flex Products, Inc.
    Inventors: Michael V. Burris, Bryan B. Burris
  • Resin film and applications thereof
    Patent number: 6790914
    Abstract: A film for a display device produced by using a transparent (crosslinked) resin film formed of a composition including a cyclic olefin addition copolymer of the present invention has optical transparency, heat resistance, liquid crystal resistance, dimensional stability, and adhesion and is suitably used as an alternative to a glass substrate of a liquid crystal display device and an EL display device. The transparent (crosslinked) resin film can be used as a polarizing film, surface protective film, retardation film, transparent conductive film, light diffusion film, film for an EL display device, transparent conductive composite material, antireflection film, and the like.
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: September 14, 2004
    Assignee: JSR Corporation
    Inventors: Tarou Kanamori, Kouji Kawahara, Yuuichi Hashiguchi, Yooichiroh Maruyama, Noboru Oshima
  • Rubber composition for extrusion molding and for molding with mold and use thereof
    Patent number: 6784255
    Abstract: This invention relates to a rubber composition for extrusion and molding comprising 100 weight parts of ethylene/&agr;-olefin/non-conjugated polyene copolymer (A) composed of ethylene, &agr;-olefin having carbon atoms of 3-20 and non-conjugated polyene, and at least 30-300 weight parts of carbon black (B), and 1.0×10−5-5.0×10−3 mol of an alkoxysilane compound shown by the following formula (I): wherein, R is alkyl or alkoxy, R1 is alkyl or phenyl, n is 0, 1 or 2, R2 is a bivalent hydrocarbon, R3 is arylene group, m and p are 0 or 1 respectively, and m and p are not 0 at a same time, q is 1 or 2, and D is —SCN or —SH when q is 1, and —Sx— when q is 2 (wherein x is an integer of 2-8).
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: August 31, 2004
    Assignees: Mitsui Chemicals Inc., Degussa AG
    Inventors: Hidenari Nakahama, Yuji Ishii, Mikio Hosoya, Masaaki Kawasaki
  • Rubber composition for the sidewall of a tire and a pneumatic using the same
    Patent number: 6780915
    Abstract: A rubber composition for a tire sidewall which can prevent color change to brown and has sufficient ozone resistance and improved low heat build-up characteristics, and a pneumatic tire having a sidewall containing such a rubber composition. The rubber composition includes 5 to 150 parts by weight of carbon black having a nitrogen adsorption specific surface area of 70 to 300 m2/g and 5 to 100 parts by weight of calcium carbonate based on 100 parts by weight of a rubber component containing 20 to 70% by weight of a natural rubber and 30 to 80% by weight of a synthetic diene rubber.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: August 24, 2004
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Noriko Yagi, Kiyoshige Muraoka
  • Highly conductive thermoplastic elastomer (TPE) gap filler
    Patent number: 6780921
    Abstract: A highly conductive thermoplastic elastomer gap filler having superior durability and EMI shielding properties. According to the preferred embodiment, the TPE comprises graphite fiber having a nickel-copper-nickel coating formed thereabout that is suspended within an elastomer, which preferably comprises polyvinylchloride. The TPE of the present invention is particularly well-suited for reducing radio frequency electromagnetic radiation reflected by gaps formed between adjacent panels of a structure, and is particularly well-suited for the maintenance and repair of low observable aircraft. The TPE of the present invention may further be modified to include carbon black filler.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: August 24, 2004
    Assignee: Northrop Grumman Corporation
    Inventors: David Arthur Luippold, Mark David Brown, John Wilbur Tully