Patents Represented by Attorney Joseph C. Gil

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  • Process for preparing low-monomer-content TDI trimers
    Patent number: 6992186
    Abstract: The invention relates to a novel process for preparing low-monomer-content trimers based on 2,4- and/or 2,6-diisocyanatotoluene (TDI). A catalytic trimerization is carried out in a mixture of from 20 to 80% by weight of a diisocyanate component containing at least 80% by weight of 2,4- and/or 2,6-diisocyanatotoluene, from 20 to 80% by weight of solvent, and 0–20% by weight of an alcohol component, and also phenolic catalysts containing dialkylamino-methyl groups. In the course of ongoing trimerization, in one or more steps, additional monomeric 2,v4-diisocyanatotoluene is metered in.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: January 31, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Brahm, Oswald Wilmes, Joachim Simon
  • Polyurea polyrethanes having improved physical properties
    Patent number: 6989406
    Abstract: A process for preparing oil and petroleum-resistant cellular to solid (polyurea)polyurethanes (PURS) with improved physical properties in which a polyether polyol component having a number average molecular weight of from 1000 to 8000 and a polyester polyol component having a number average molecular weight of from 1000 to 6000 are reacted with a polyisocyanate and the (polyurea) polyurethanes produced by that process. The (polyurea)polyurethanes are particularly useful for personal safety equipment and in the construction of automobiles.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: January 24, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Detlef Arntz, Klaus Brecht, Bernhard John, Peter Seifert, Michael Schneider
  • Electrolytic capacitors with a polymeric outer layer
    Patent number: 6987663
    Abstract: Electrolytic capacitors having low equivalent series resistance and low leakage current are described. The electrolytic capacitors include a solid electrolyte layer of a conductive material in particular a conductive polymer, and an outer layer that includes binders, polymeric anions and conductive polymers (e.g., polythiophenes). Also described is a method of preparing electrolytic capacitors that involves forming the conductive polymer of the solid electrolyte layer in situ by means of chemical oxidative polymerization or electrochemical polymerization. Electronic circuits that include the electrolytic capacitors are also described.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: January 17, 2006
    Assignee: H.C. Starck GmbH
    Inventors: Udo Merker, Klaus Wussow, Friedrich Jonas
  • Polyadducts containing uretidone groups
    Patent number: 6987158
    Abstract: Polyaddition compounds containing uretdione groups prepared by reacting uretdione polyisocyanates formed from diisocyanates having exclusively secondary- and/or tertiary-attached isocyanate groups with a molar fraction of isocyanurate structures, based on the sum of uretdione groups and isocyanurate groups, of not more than 10%, with compounds reactive towards isocyanates. The polyaddition compounds can be use as a starting component in the preparation of polyurethane plastics, in particular as crosslinkers for heat-crosslinkable powder coating materials. The compounds may be used as starting components in the preparation of moldings and shaped parts, and as starting components in the preparation of coating materials and coatings.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: January 17, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Peter Thometzek, Michael Grahl, Hans-Ulrich Meier-Westhues
  • Method for removing deposits from chemical reactors
    Patent number: 6986816
    Abstract: The invention relates to a process for the removal of deposits formed in a reaction apparatus by the precipitation of solids from a liquid reaction mixture, which process is characterized in that particles of a material that is inert under the reaction conditions are introduced into the reaction apparatus, which particles, by suitable mechanical circulation of the reaction mixture, are so moved through the reactor that, during the reaction, by striking the walls or other built-in elements, they abrasively remove precipitates adhered thereto.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: January 17, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus-Peter Reisinger, Sven Michael Hansen, Peter Fischer, Konrad Triebeneck, Joachim Helbig
  • Process for preparing aspartates
    Patent number: 6984715
    Abstract: The present invention relates to novel aspartates, their method of production and the use of these mono and polyaspartates as reactive components for polyisocyanates in two-component polyurethane coating compositions and for preparing polyurethane prepolymers.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: January 10, 2006
    Assignee: Bayer MaterialScience LLC
    Inventors: Richard R. Roesler, Douglas A. Wicks, Terrell Dean Wayt, Brian Long, Karsten Danielmeier, Charles A. Gambino
  • Electrochemical cell for electrolyzers with stand-alone element technology
    Patent number: 6984296
    Abstract: The invention describes an electrochemical cell for the membrane electrolysis process for electrolyzers with single-element technology. The cell consists of at least of 2 half-shells (8, 10), which surround an anolyte chamber (16) and a cathode chamber (22) with a membrane (5) arranged in between, and an anode (6) in the anolyte chamber (16), with the cathode chamber (22) being provided with an oxygen-consuming cathode (4), with a plurality of pressure-compensated gas pockets (15) arranged one above the other, a catholyte gap (14) and optionally a back chamber (19), where electrically conducting supporting elements (7) are provided in the anolyte chamber (16) and supporting elements (3, 2, 1) are provided in the cathode chamber (22) at the same position opposite one another.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: January 10, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventor: Fritz Gestermann
  • Process for the two-step production of dinitrotoluene
    Patent number: 6984762
    Abstract: The invention relates to a process for the production of dinitrotoluene by the two-stage nitration of toluene. In the first stage of this process, toluene was reacted adiabatically with nitrating acid so that at least 90% of the toluene was reacted off and no more than 70% of the toluene formed dinitrotoluene. The resulting organic phase containing mononitrotoluene and the aqueous acid phase containing sulfuric acid were separated, and the aqueous acid phase containing sulfuric acid was concentrated by flash evaporation. The resulting concentrated sulfuric acid was recycled into the reaction in the first stage, and/or into the reaction in the second stage, and/or into the concentration in the second stage. In the second stage, the organic phase containing mononitrotoluene from the first stage was completely reacted isothermally with nitrating acid.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: January 10, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Dieterich, Anke Hielscher, Berthold Keggenhoff, Manfred Keller-Killewald, Jürgen Münnig, Dietmar Wastian
  • Solvent-free room temperature curing reactive systems and the use thereof in the production of adhesives, sealing agents, casting compounds, molded articles or coatings
    Patent number: 6977279
    Abstract: The present invention relates to novel solventless reactive systems curable at room temperature, based on blocked polyisocyanates, primary amines, compounds with oxirane groups, and 2,3-dimethyl-3,4,5,6-tetrahydropyrimidine, and to processes for the preparation of these solventless reactive systems curable at room temperature.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: December 20, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jörg Tillack, Wolfgang Puetz, Lutz Schmalstieg
  • Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereof
    Patent number: 6977290
    Abstract: The present invention relates to a method for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and NCO-terminated prepolymers obtainable therefrom. The inventive compounds may find use in the preparation of polyurethanes.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: December 20, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hartmut Nefzger, Erika Bauer, Manfred Schmidt, Hans-Dieter Ruprecht, James-Michael Barnes
  • Reactive systems that harden at room temperature
    Patent number: 6977289
    Abstract: The invention relates to new blocked polyurethane prepolymers, a process for their production and reactive systems produced therefrom that harden at room temperature, and their use.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: December 20, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kamelia Detig-Karlou, Joachim Simon, Malte Homann, Thomas Stingl, Jörg Tillack
  • Process for the manufacture of (poly-)isocyanates in the gas phase
    Patent number: 6974880
    Abstract: The present invention relates to a process for the manufacture of diisocyanates by phosgenation of the corresponding diamines in which the vaporous diamines, optionally rarefied with an inert gas or with the vapors of an inert solvent, and phosgene are heated separately to temperatures of about 200° C. to about 600° C. and mixed and reacted in a tube reactor characterized in that a number n?2 of nozzles directed parallel to the axis of the tube reactor are arranged in the tube reactor, the diamine-containing stream being fed into the tube reactor through the n nozzles and the phosgene stream being fed into the tube reactor through the remaining free space.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: December 13, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Biskup, Peter Keldenich, Peter Fuhrmann, Christian Six
  • Reduction of monomer content and stabilization of polyaziridines
    Patent number: 6974874
    Abstract: The invention relates to a process for reducing the monomeric aziridine content in a polyaziridine forming reaction mixture by adding to the polyaziridine forming reaction mixture an excess of a carbodiimide scavenger wherein the excess is based on the equivalent ratio of scavenger to monomeric aziridine, and to a product obtained by this process and to a coating composition containing the product obtained by the process.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: December 13, 2005
    Assignee: Bayer MaterialScience LLC
    Inventors: Lanny D. Venham, Myron W. Shaffer, Karsten Danielmeier, Karen M. Henderson
  • Extraction of phenol-containing effluent streams
    Patent number: 6972345
    Abstract: A process for extracting phenol from a phenol-containing aqueous solution is disclosed. The process entails contacting the aqueous solution with an extracting agent that comprise a mixture of 60 to 99% of methyl isobutyl ketone, 1 to 40% of anisole and 0 to 20% of mesitylene.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: December 6, 2005
    Assignee: Bayer MaterialScience AG
    Inventors: Ulrich Blaschke, Stefan Westernacher
  • Aqueous secondary dispersions
    Patent number: 6962953
    Abstract: The present invention relates to heat and storage stable vinyl polymer polyol secondary dispersions containing A) at least one vinyl polymer resin having functional groups selected from hydroxyl, carboxyl and/or sulfonic acid groups and dispersed in a water/solvent mixture in the presence of a neutralizing agent, and B) at least one amphiphilic polymer built up from a hydrophobic and a hydrophilic segment. The invention also relates to a process for the preparation of the vinyl polymer polyol secondary dispersions by preparing vinyl polymer resin A) by polymerizing a mixture of ethylenically unsaturated monomers a) in the presence of an initiator b) in a water/solvent mixture and adding at least one amphiphilic polymer B), then at least partly neutralizing and dispersing the resulting product, optionally after the addition of a further amount of water.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: November 8, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Probst, Martin Melchiors, Wieland Hovestadt, Michael Sonntag, Burkhard Köhler, Bernhard Jansen
  • Compositions containing polycarbonate
    Patent number: 6960623
    Abstract: A thermoplastic molding composition especially suitable for preparing extruded articles is disclosed. The composition contains polycarbonate, a fatty acid ester and a triazine conforming to formula (I) wherein R1, R2, R3 and R4 independently one of the others is selected from the group consisting of C1-C8-alkyl, halogen and —CN, and where R5 is H or C1-C20-alkyl.
    Type: Grant
    Filed: May 28, 2001
    Date of Patent: November 1, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rüdiger Gorny, Siegfried Anders, Wolfgang Nising
  • Radiation-curing coating compositions
    Patent number: 6960639
    Abstract: Aqueous coating compositions based on polyurethane dispersions which cure under the influence of high-energy radiation, to a process for preparing them and to their use. The coating compositions contain a polyisocyanate, a polyurethane containing free-radically polymerizable groups, and an initiator which is capable of initiating a free-radical polymerization.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: November 1, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Erhard Lühmann, Christoph Irle, Thorsten Rische, Karin Naujoks, Thomas Feller, Jan Mazanek
  • Active material for rechargeable batteries
    Patent number: 6958139
    Abstract: A mixed metal hydroxide with brucite structure is described, which contains nickel hydroxide as its main component and at least one trivalent metal selected from the group consisting of Co, Fe, Al, Ga, In, Sc, Y and La in an amount of from about 12 to about 30 atom % relative to the sum of the metal components including Ni. The invention also relates to a rechargeable battery containing a mixed metal hydroxide according to the invention as an electrochemically active material as well as a secondary batter containing the mixed metal hydroxide. The invention also relates to a process for producing a mixed metal hydroxide having a brucite structure.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: October 25, 2005
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Oskar Glemser, Sven Albrecht
  • Cellulose derivatives having gel-like rheological properties and process for the preparation thereof
    Patent number: 6958393
    Abstract: A description is given of cellulose derivatives having gel-like rheological properties in aqueous solution characterized in that: a) cellulose is alkalized with aqueous alkali metal hydroxide solution in the presence of a suspension medium, b) the alkalized cellulose is reacted with one or more alkylene oxides, c) then reacted with an alkyl halide present in the suspension medium d) subsequently or simultaneously the alkalized cellulose is reacted with a crosslinking agent in an amount of 0.0001 to 0.05 eq, where the unit “eq” represents the molar ratio of crosslinking agent relative to the anhydroglucose unit (AGU) of the cellulose used, and e) after, if appropriate, further addition of alkali metal hydroxide and/or alkylating agent, the resultant irreversibly crosslinked cellulose derivative is separated off from the reaction mixture, if appropriate purified and dried.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: October 25, 2005
    Assignee: Wolff Cellulosics GmbH & Co. KG
    Inventors: Hartwig Schlesiger, Arne Henning Kull, Erik-Andreas Klohr
  • Process for working up secondary components in the preparation of dinitrotoluene
    Patent number: 6953869
    Abstract: The present invention relates to a process for working up organic secondary components which are formed in the one-stage or two-stage nitration of toluene to dinitrotoluene. These organic secondary components are present in the acidic and alkaline waste water from the dinitrotoluene washing step and in the aqueous distillate from the sulfuric acid concentration step, together with small amounts of mononitrotoluene and dinitrotoluene. This process comprises a) combining the acidic and alkaline waste waters from the washing step and the aqueous distillate from the sulfuric acid concentration step such that the resulting mixture has a pH below 5, b) separating the aqueous and organic phases which form by phase separation, and c) recycling the organic phase from step b) into the nitration process.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: October 11, 2005
    Assignee: Bayer MaterialScience AG
    Inventors: Jürgen Münnig, Dietmar Wastian, Wolfgang Lorenz, Berthold Keggenhoff