Patents Represented by Attorney, Agent or Law Firm Aron Preis
  • ABS molding compositions having improved processability
    Patent number: 6639000
    Abstract: An additive mixture containing a dibenzoate and either or both of a compound containing at least one structural unit and a compound containing at least one structural unit is disclosed. The additive combination enhances the processability of a thermoplastic molding composition that contains a (co)polymer of styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride and N-substituted maleimide and a graft copolymer.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: October 28, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Siebourg, Edgar Leitz, Herbert Eichenauer
  • Safety bumper comprising an energy-absorbing element controlled by an impact sensor
    Patent number: 6637788
    Abstract: The safety bumper includes: (a) a bumper basic body (4) having a forward surface; (b) a bumper bar (5); (c) a mounting member (11); (d) a cross-bar (10) of the vehicle, (e) at least one of a deployable energy-absorbing element (9; 32, 33, 39, 41; 52, 60) positioned above the mounting member (11) and a deployable energy-absorbing element (17, 20; 38, 46; 64) positioned below mounting member (11); and (f) an impact sensor (6) located in bumper bar (5). The bumper bar (5) is connected to bumper basic body (4) and extends through to the forward surface of bumper basic body (4), bumper bar (5) is also connected to mounting member (11), and mounting member (11) is located behind bumper basic body (4) and bumper bar (5). The mounting member (11) is connected to cross-bar (10), which is located behind mounting member (11).
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: October 28, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Olaf Zöllner, Andreas Lang, Thorsten Bredemann
  • Composition containing thermoplastic polymers
    Patent number: 6632864
    Abstract: A method of using an extrudable thermoplastic compositions that contains a mixture of benzotriazoles is disclosed. The composition is suitable for producing sheets having improved surface quality.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: October 14, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rüdiger Gorny, Siegfried Anders, Wolfgang Nising
  • Process for continuous production of polycarbonates and a reactor therefor
    Patent number: 6630563
    Abstract: A process for producing polycarbonate is disclosed. The process entails obtaining an oligocarbonate produced by transesterification of diaryl carbonate with dihydroxyaryl compound in the presence of catalysts and introducing the oliogocarbonate into a reactor that enables continuous formation of free films at a rate higher than 10. The reactor including a horizontal cylinder equipped with a heating jacket, at least one vapor outlet, a feed nozzle an outlet nozzle, a rotatable cylindrical basket having a cylindrical perforated wall and annular discs positioned at intervals around the periphery of said basket and along the length thereof, and means for rotating said basket, the interior of said basket including no central shaft, the diameter of the cylindrical basket corresponding to about ⅔ of the diameter of the horizontal cylinder, and said discs being formed of perforated sheet metal.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: October 7, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Uwe Hucks, Thomas König, Silke Kratschmer, Eike Schulz Van Endert, Klaus Schröder, Hans-Peter Hoffmann
  • Decorated article made by film insert molding
    Patent number: 6623677
    Abstract: A process for making a decorated article is described. The process entails printing, using a high temperature ink, a design on a surface of transfer paper, and transferring the design by sublimation to the surface of a clear flat substrate to obtain a decorated substrate. The thus decorated surface is then placed in a mold and thermoplastic resin is injected to form an article. The placing of the decorated substrate in the mold is such that the surface carrying the design faces the inside of the mold. An additional embodiment entails forming the decorated substrate to attain a three dimensional decorated substrate prior to placing it in the mold.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: September 23, 2003
    Assignee: Bayer Corporation
    Inventors: Stephen G. Smith, Patrick J. Griffin, Keith R. Heffley, Diane D. Dougherty
  • Process for producing thermally stable thermoplastic polyurethanes
    Patent number: 6624278
    Abstract: A continuous process for the production of thermoplastically processable polyurethane elastomer is disclosed. The process comprise adding acid H compounds in an amount calculated to control and render constant the melt viscosity of the product. The inventive elastomer has constant melt flow behavior and high thermal stability.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: September 23, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedemann Müller, Wolfgang Bräuer, Hans-Georg Hoppe, Hans-Georg Wussow, Hans Wagner
  • Process for the preparation of graft rubber latexes having a reduced residual monomer content
    Patent number: 6620883
    Abstract: The invention relates to a process for the preparation of graft rubber polymers of the ABS type by emulsion polymerization according to the so-called fed batch process, in which latexes having markedly reduced residual monomer contents are obtained, and to compositions containing the mentioned graft rubber polymers.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 16, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Erich Gasche, Herbert Eichenauer, Pierre Vanhoorne, Ulrich Jansen, Eckhard Wenz, Stefan Moss
  • Containers made of a branched polycarbonate
    Patent number: 6613869
    Abstract: A branched polycarbonate resin suitable for making containers is disclosed. The polycarbonate is characterized in that at 260° C. and shear rate of 10 s−1 it has a melt viscosity of 5500 to 900 Pas, and in that at 260° C. and shear rate of 1000 s−1 it has a melt viscosity of 880 tom 1500 Pas, and in that it has a melt flow index (MFR) of 0.1 to 3.0 g/10 min. A container made of the polycarbonate exhibits great breaking strength.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: September 2, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Horn, Ralf Hufen, Wolfgang Alewelt, Peter Gebauer, Franky Bruynseels
  • Process for producing polycarbonates
    Patent number: 6613868
    Abstract: A process for the production of polycarbonate is disclosed. The process, representing an improvement over the known interfacial polycondensation process entails introducing into the loop of a circulating reactor that additionally contains, a residence tank, an optional mixer, a pump, and a heat exchanger (i) an organic phase that contains a solvent for polycarbonate and phosgene and (ii) an aqueous phase that contains an aqueous lye solution, a dihydroxy compound and an optional monophenol to form an emulsion. Maintaining specified temperature and process conditions results in polycarbonate resin having good properties and in waste water that are characterized by their purity.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: September 2, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Kauth, Christian Kords, Jürgen Heuser
  • Flame-resistant polycarbonate ABS moulding materials
    Patent number: 6613822
    Abstract: A thermoplastic molding composition that contains aromatic polycarbonate and/or polyester carbonate, a graft polymer, phosphazene compound, phosphorus compound and fluorinated polyolefin is disclosed. The composition exhibits excellent flame retardance and very good mechanical properties, including weld line strength and impact strength.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: September 2, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Michael Zobel, Dieter Wittmann
  • Aromatic copolyester containing active ingredients
    Patent number: 6605069
    Abstract: The invention relates to aromatic copolyesters comprising antimicrobially active substances in homogeneous distribution, processes for their preparation and their use in medical articles.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: August 12, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Albers, Ralf Dujardin, Heinz Pudleiner, Joachim Simon, Rita Fröde, Hartwin Hobler
  • Method for reprocessing reaction mixtures containing diaryl carbonate
    Patent number: 6605191
    Abstract: A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic hydroxy compound, water, base and quaternary salt, separating the mixture in a distillation apparatus having only one theoretical separation stage into a liquid phase and a gas phase and recycling the liquid phase without further work up to the reaction step of the direct carbonylation.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: August 12, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Carsten Hesse, Ursula Jansen, Johann Rechner, Claus-Peter Reisinger, Rob Eek, Kaspar Hallenberger, Martin Friedrich
  • Additive mixtures containing thermoplastic moulding compositions
    Patent number: 6602939
    Abstract: A thermoplastic molding composition suitable for preparing molded articles having improved mechanical properties is disclosed. The composition contains A) a (co)polymer of at least one monomer selected from the group consisting of styrene, &agr;-methylstyrene, nuclear-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride and N-substituted maleimide , and B) a graft polymer of B.1) at least one member selected from the group consisting of styrene, &agr;-methylstyrene, nuclear-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride and N-substituted maleimide on B.2) a rubber having a glass transition temperature of ≦10° C. and C) a mixture of at least 3 components selected from I) metallic compounds, II) esters III) amides and IV) certain specified compounds exemplified by oil or wax.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: August 5, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventor: Herbert Eichenauer
  • Method for producing modified polycarbonates
    Patent number: 6596840
    Abstract: A process for the synthesis of polycarbonate is disclosed. The process entails reacting in the presence of at least one phosphonium salt as catalyst, at least one diphenol, at least one carbonic acid diester, and at least one alkyl group-substituted phenol chain terminator. The chain terminator is introduced in free form or as a transesterifiable compound under the conditions of the synthesis. The polycarbonate thus produced is suitable for preparing a variety of molded articles.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Silke Kratschmer, Uwe Hucks, Lothar Bunzel
  • Flame-resistant polycarbonate ABS moulding material
    Patent number: 6596794
    Abstract: Thermoplastic moulding compositions based on polycarbonate and/or polyester-carbonate comprising graft polymer prepared by means of bulk, solution or bulk-suspension polymerization processes and phosphorus compounds of the general formula (I)
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Michael Zobel, Bernd Keller, Dieter Wittmann
  • Static mixer with at least three interleaved grids
    Patent number: 6595679
    Abstract: A static mixer is disclosed comprising a mixer insert and an enclosing housing having a central axis. The insert includes at least three interleaved grids and each of the grids includes a plurality of layers that are superposed parallel one to the others. Each of the layers includes a plurality of bars that are mutually parallel one to the others. There is an angle of 30 to 60 degrees between each of the bars and the axis.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventor: Heinrich Schuchardt
  • Light-resistant thermoplastic polyurethanes, a process for their preparation and their use
    Patent number: 6596820
    Abstract: A thermoplastic molding composition that contains a light-resistant aliphatic thermoplastic polyurethane elastomer is disclosed. The composition which largely contains of thermoplastic polyurethanes with high molecular weights and small amounts of thermoplastic polyurethanes with low molecular weights is useful for the preparation of a variety of articles and for use as sinterable composition in powder form.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hanns-Peter Müller, Horst Gruttmann, Wolfgang Kaufhold, Henricus Peerlings
  • Polycarbonate molding materials exhibiting improved mechanical properties
    Patent number: 6596800
    Abstract: A thermoplastic molding compositions comprising thermoplastic polycarbonate and an additive amount of a zinc compound having an average particle diameter of 1 nm to 20 &mgr;m is disclosed. The composition has an improved crude shade and improved mechanical properties.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: July 22, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Zobel, Thomas Eckel, Dieter Wittmann, Bernd Keller
  • Process for the continuous production of superabsorbent polymers from PAN emulsions
    Patent number: 6590040
    Abstract: A process for producing a superabsorbent polymer is described. The process that entails a continuous hydrolysis of an aqueous emulsion of crosslinked or uncrosslinked polyacrylonitrile in the form of fine particles is carried out in a cascade of stirred tanks. The reaction with alkali-hydroxide solution an aqueous-alcoholic medium at 60 to 100° C. yields polymers that are suitable for the preparation of hygiene products, water-storing materials in agriculture, and sheathing of electrical cables.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: July 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Sackmann, Rolf-Volker Meyer, Sergei Schapowalow, Telman Bayburdov, Jgor Nakonetschny
  • Initiation method of a method for producing 2,2-bis(4-hydroxyphenyl)propane
    Patent number: 6590128
    Abstract: A process for the commissioning of a process for the production of 2,2-bis(4-hydroxyphenyl)propane is disclosed. The process that entails reacting phenol with acetone in the presence of sulfonated cross-linked polystyrene resins is characterized in that the commissioning takes place with an acetone concentration reduced below, and a phenol concentration increased above, that of the optimal sustained operation state, with a reduced quantitative throughput, and in that with temperature control, the reactant quantity and the acetone content of the reactor feed are subsequently increased until the sustained operating state is reached.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: July 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Bödiger, Rainer Neumann, Frieder Heydenreich, Michael Prein, Hans-Ludwig Fofonka