Patents Examined by Henry S. Hu
  • Patent number: 6890657
    Abstract: A surface contacting member for toner fusing systems and processes. This surface contacting member has a fluoroelastomer surface layer containing amorphous silica that has been surface treated with at least one organoaminosilane.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: May 10, 2005
    Assignee: Eastman Kodak Company
    Inventors: Jerry A. Pickering, Stephen V. Davis, Theodora Miller
  • Patent number: 6890994
    Abstract: The invention provides an acrylic polymer or oligomer comprising random repeating units of the formula: a method of making said polymers and curable coating compositions comprising the same.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: May 10, 2005
    Assignee: BASF Corporation
    Inventors: Walter H. Ohrbom, Craig S. Schang, Donald Campbell, Donald L. St. Aubin
  • Patent number: 6869997
    Abstract: 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 one or more of an antifoulant, a buffering agent and a chain-transfer agent.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: March 22, 2005
    Assignee: Arkema, Inc.
    Inventors: Roice Andrus Wille, Lotfi Hedhli, Mehdi Durali, Sayed Youssef Antoun
  • Patent number: 6867273
    Abstract: Vinylidene fluoride polymers, characterized in that they are thermoplastic vinylidene fluoride/chlorotrifluoroethylene/hexafluoropropylene terpolymers and in that they contain at least 70% vinylidene fluoride, process for obtaining them and use thereof.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: March 15, 2005
    Assignee: Solvay (Societe Anonyme)
    Inventors: Thierry Lannuzel, Vincent Meunier, Régis Faig, Olivier Vidberg
  • Patent number: 6864336
    Abstract: The present invention is based on quad-fluoropolymer suitable for the preparation of a fluoroelastomer. The fluoropolymer comprises repeating units derived from 10 to 40 mol % of tetrafluoroethylene, 40 to 65 mol % of vinylidene fluoride, 1 to 30 mol % of a perfluorinated vinyl ether of the formula CF2?CFOCF2CF2CF2OCF3, 1 to 20 mol % of perfluoromethyl vinylether.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: March 8, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Harald Kaspar, Klaus Hintzer, Guy van Gool, Franz März, Allan T. Worm, Tatsuo Fukushi
  • Patent number: 6861466
    Abstract: 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 and 70% by weight. The dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol (hereinafter called low molecular weight fluorinated surfactant) or contains the low molecular weight fluorinated surfactant in an amount of not more than 0.05% by weight based on the total weight solids of the dispersion. The dispersion further comprises a non-ionic non-fluorinated surfactant or mixture of non-ionic non-fluorinated surfactants and one or more non-fluorinated anionic surfactants. Through the use of a non-fluorinated anionic surfactant, a dispersion is obtained that has a low viscosity at room temperature (20° C.).
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: March 1, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Michael C. Dadalas, Leonard W. Harvey
  • Patent number: 6858692
    Abstract: A fluoropolymer having repeating units formed by cyclopolymerization of a functional group-containing fluorinated diene represented by the following formula: CF2?CR1-Q-CR2?CH2??(1) wherein each of R1 and R2 which are independent of each other, is a hydrogen atom, a fluorine atom, an alkyl group having at most 3 carbon atoms, or a fluoroalkyl group having at most 3 carbon atoms, and Q is a bivalent organic group having a functional group bonded thereto, and a production method which comprises subjecting the above diene to radical polymerization. The polymer has a high Tg and a functional group concentration sufficient to exhibit the characteristics thereof.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: February 22, 2005
    Assignee: Asahi Glass Company, Limited
    Inventors: Isamu Kaneko, Yoko Takebe
  • Patent number: 6858674
    Abstract: The invention provides a primary carbamate functional material of the formula: a method of making said materials and curable coating compositions comprising the primary carbamate functional material of the invention. The primary carbamate functional material comprises the reaction product of (1) at least one material P comprising one or more functional groups (i) which are reactive with a functional group Z but which are substantially nonreactive with a primary carbamate group X of monomeric reactive compound (2), and (2) a monomeric reactive compound comprising one or more structures of a particular formula.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: February 22, 2005
    Assignee: BASF Corporation
    Inventors: Walter H. Ohrbom, Craig S. Schang
  • Patent number: 6855774
    Abstract: A crosslinkable elastomer composition which provides a crosslinked product with improved mechanical strength and heat resistance, comprising, (A) a compound having at least two crosslinkable groups represented by the formula (I): and (B) an elastomer which contains a crosslinking site capable of reacting with the crosslinkable group (I) is prepared.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: February 15, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuyoshi Kawasaki, Tsuyoshi Itagaki, Katsuhiko Iseki, Takafumi Yamato, Tsuyoshi Noguchi
  • Patent number: 6855800
    Abstract: For trapping a residual monomer containing an expoxide function that has not reacted by copolymerization or by grafting, in a thermoplastic composition based on a copolymer of ethylene and/or propylene, a sufficient amount of an acidic trapping additive is added to remove the residual monomer. The trapping additive is preferably a porous zeolite with a pore diameter of between 2 and 10 angstroms. Improved compositions and blends are thereby obtained.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: February 15, 2005
    Assignee: ARKEMA
    Inventor: Thierry Senninger
  • Patent number: 6853790
    Abstract: The present invention is directed to optical waveguides or waveguide systems, comprising at least (a) a first material which is a poly(perfluorocyclobutane), and in direct contact to this material, (b) a second material which is a polycyanate resin made from at least one aromatic difunctional cyanate of formula (I) wherein R1 to R8 are independently from each other hydrogen, optionally substituted C1-C10 alkyl, C3-C8 cycloalkyl, C1-C10 alkoxy, halogen, phenyl or phenoxy, the alkyl or aryl groups being unfluorinated, partly fluorinated or fully fluorinated with the proviso that (I) carries at least 1 fluorine atom, and Z is a chemical bond, SO2, CF2 CH2, CHF, CH(CH3), isopropylene, hexafluoroisopropylene, n- or iso-C1-C10 alkylene which may be partly or fully fluorinated, O, NR9 whereby R9 is hydrogen or C1-C10 alkyl, N?N, CH?CH, C(O)O, CH?N, CH?N—N?CH, alkyloxyalkylene having 1 to 8 carbon atoms, S, or Si(CH3)2 optionally in mixture with other components.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: February 8, 2005
    Assignee: Pirelli Cavi e Sistemi S.p.A.
    Inventors: Monika Bauer, Jörg Bauer, Christian Dreyer, Norbert Keil, Crispin Zawadzki
  • Patent number: 6846904
    Abstract: After a melt-processable fluorine-containing copolymer is heated and molten, the copolymer is reheatd in a closed apparatus under a non-static condition at a temperature of, for example, 130° C. to the melting point of the fluorine-containing polymer, whereby a content of volatile materials in the copolymer is reduced to 30% or less of an initial content of volatile materials. Thereby, the content of volatile materials in the melt-processable fluorine-containing copolymer, which has been once molten, can be effectively decreased without using a large apparatus while avoiding the contamination of the copolymer with foreign particles.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: January 25, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroyuki Imanishi, Yoshiyuki Hiraga, Masayuki Namimatsu, Satoshi Komatsu
  • Patent number: 6846902
    Abstract: The invention relates to a process for trapping a free monomer which has not reacted by copolymerization or by grafting comprising at least one epoxide functional group in a thermoplastic composition based on ethylene and/or on propylene and based on at least one monomer comprising at least one epoxide functional group. The process can comprise the following stages: (i) preparation of the thermoplastic composition; and (ii) addition of a sufficient amount of a solid trapping additive exhibiting, at its surface, sites with a basic nature within the Lewis or Brönstead meaning. The trapping additive comprises a porous zeolite, the diameter of the pores of which is between 5 and 15 angströms, preferably between 6 and 13 angströms. The invention also relates to the composition obtained by such a process and to the blends comprising such a composition.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: January 25, 2005
    Assignee: Atofina S.A.
    Inventor: Thierry Senninger
  • Patent number: 6838512
    Abstract: A cold shrink article including a fluoroelastomer composition comprising a first fluoroterpolymer having a weight average molecular weight centered from about 107 to about 108. A second fluoroterpolymer included in the fluoroelastomer composition has a weight average molecular weight centered at 104. The first fluoroterpolymer combines with the second fluoroterpolymer to provide a mixed terpolymer. Other components of the fluoroelastomer composition include a processing aid, a filler, an oil, and a curative. The fluoroelastomer composition upon curing at an elevated temperature provides the cold shrink article that has a permanent set value of 21% or less.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: January 4, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Robert E. Eggers, James C. Margl, Steven D. Yau
  • Patent number: 6833403
    Abstract: Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a nonionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: December 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Hermann Blädel, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger, Reinhard Albert Sulzbach
  • Patent number: 6833418
    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.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: December 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Lian S. Tan, Richard S. Buckanin, E. Steven McAlister
  • Patent number: 6831128
    Abstract: Water-continuous emulsion of silylated elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; a silylated elastomeric polymer, surfactant, water, optional plasticizer, and optional low molecular weight acid. The water-continuous emulsions of silylated elastomeric polymers can be prepared by; (I) forming a premix comprising an elastomeric polymer and surfactant, and optionally a plasticizer and low molecular weight acid, and (II) adding water to the premix with mixing to form a water continuous emulsion of the silylated elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: December 14, 2004
    Assignee: Dow Corning Corporation
    Inventors: Michael Gene Altes, Lee Bowen Jensen, Shaow Burn Lin, Anil Kumar Saxena, Anne Katja Shim, Todd Matthew Starke, Toshio Suzuki
  • Patent number: 6828387
    Abstract: The invention disclosed herein relates to an improved process for making elastomeric polyisoprene articles. In particular, the process of the invention is a system which produces synthetic polyisoprene articles exhibiting tensile strength properties similar to that of solvent-based processes using natural rubber latex. The process comprises an accelerator composition at the pre-cure stage comprising a dithiocarbamate, a thiazole and a guanidine compound. In a preferred embodiment, the accelerator composition comprises zinc diethyldithiocarbamate (ZDEC), zinc 2-mercaptobenzothiazole (ZMBT) and diphenyl guanidine (DPG), in conjunction with a stabilizer, such as sodium caseinate. The invention also includes an elastomeric polyisoprene product made by the process, such as a surgeon's glove.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: December 7, 2004
    Assignee: Allegiance Corporation
    Inventors: Shiping Wang, Yun-Siung Tony Yeh, Randell Wenig, Wong Weicheong
  • Patent number: 6825300
    Abstract: The present invention discloses a process for making a fluoropolymer having nitrile endgroups. The process comprises a free radical polymerization of one or more fluorinated monomers in the presence of a nitrile group containing salt or a nitrile group containing pseudohalogen compound.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: November 30, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Werner M. A. Grootaert, Klaus Hintzer, Kai Helmut Lochhaas, Gernot Löhr, Franz März
  • Patent number: 6825250
    Abstract: The present invention provides a process of reducing the amount of fluorinated emulsifier in an aqueous fluoropolymer dispersion by contacting the aqueous fluoropolymer dispersion with an anion exchange resin in a non-fixed resin bed, the process comprising: (a) mixing the aqueous fluoropolymer dispersion with an effective amount of a surfactant so as to stabilize the fluoropolymer dispersion while being contacted with the anion exchange resin; (b) contacting the aqueous fluoropolyrner dispersion with an anion exchange resin by agitating the aqueous fluoropolymer dispersion with an effective amount of anion exchange resin for a time of less than 4 hours to reduce the amount of fluorinated emulsifier in the aqueous fluoropolymer dispersion to a desired level; and (c) separating the anion exchange resin from the aqueous fluoropolymer dispersion.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: November 30, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Rebekka Epsch, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger