Patents Assigned to BASF
  • Method for producing gamma-butyrolactone
    Patent number: 6521763
    Abstract: In a process for preparing GBL by reaction of 1,4 butanediol over a copper catalyst, use is made of a 1,4 butanediol-containing reaction mixture which comprises further alcohols other than 1,4-butanediol and water.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: February 18, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fischer, Rolf Pinkos
  • Catalyst comprising a complex of a metal from subgroup VIII based on a bidentate phosphonite ligand, and method for producing nitriles
    Patent number: 6521778
    Abstract: A catalyst which comprises at least one complex of a metal of subgroup VIII having at least one bidentate phosphonite ligand of the formula I or salts and mixtures thereof, a process for the preparation of mixtures of monoolefinic C5-mononitriles, a process for the catalytic isomerization of branched aliphatic monoalkenenitriles and a process for the preparation of adiponitrile.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 18, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Jakob Fischer, Wolfgang Siegel, Dagmar Pascale Keitel, Lorenz Siggel
  • Flexographic printing element comprising an IR-ablatable layer with improved sensitivity
    Patent number: 6521390
    Abstract: Photosensitive printing element for preparing flexographic printing plates via computer-to-plate technology with a support, a photopolymerizable layer and an IR-ablatable layer substantially opaque to actinic radiation which comprises at least one heat-combustible polymeric binder, at least one IR-absorbing material and at least one aliphatic diester, and a process for making a flexographic printing plate using such an element.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: February 18, 2003
    Assignees: BASF Drucksysteme GmbH, Agfa Gevaert N.V.
    Inventors: Alfred Leinenbach, Sabine Philipp, Eddy Daems, Hieronymus Andriessen, Luc Leenders
  • Aqueous dispersions for hydrolysis-resistant coatings
    Publication number: 20030032720
    Abstract: Aqueous dispersions for hydrolysis-resistant coatings, comprising a polyurethane synthesized from
    Type: Application
    Filed: July 11, 2002
    Publication date: February 13, 2003
    Applicant: BASF Aktiengesellschaft
    Inventors: Karl Haeberle, Gundo Brauch, Klaus Dieter Hoerner, Juergen Reichert, Hermann Seyffer
  • Process for stabilizing (METH)acrylic acid esters against unwanted radical polymerization
    Patent number: 6518452
    Abstract: A method is described of stabilizing (meth)acrylic esters against unwanted free-radical polymerization, in which the mixture to be stabilized has added to it a polymerization inhibitor mixture comprising at least one nitroxyl radical and/or at least one organic compound having at least one nitroso group, and at least one p-phenylenediamine.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Aichinger, Holger Herbst, Gerhard Nestler
  • Method of immediately terminating free-radical polymerisation processes
    Patent number: 6518374
    Abstract: Free radical polymerizations immediately terminated by a process comprising the addition of an inhibitor solution which contains phenothiazine and at least 50% (w/w) N-alkylpyrrolidone to a system undergoing free radical polymerization, wherein the inhibitor solution also contains p-methoxyphenol (MEHQ).
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Aichinger, Gerhard Nestler, Jürgen Schröder
  • Fast drying alkyd basecoat refinish composition
    Patent number: 6518338
    Abstract: A refinish basecoat composition includes an alkyd resin, at least one pigment dispersed by resin comprising the alkyd resin, and an hydroxyl-functional acrylic polymer. The acrylic polymer has a number average molecular weight of at least about 6000 and is polymerized using at least about 45% by weight cycloaliphatic monomer, based on total monomer weight polymerized. A mixer system that can be used to prepare the refinish basecoat has a plurality of color components, each independently including at least one pigment dispersed by resin including an alkyd resin, and a pigment-free component containing the hydroxyl-functional acrylic polymer.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Corporation
    Inventors: Emerson Keith Colyer, Henry J. Stateczny
  • Fungicidal mixtures
    Patent number: 6518275
    Abstract: Fungicidal compositions comprising an acceptable carrier and/or surface active agent and synergistically effective amounts of (a) at least one azolopyrimidine of formula I  in which R1, R2, L1, L2 and L3 have the meaning given in claim 1; and (b) at least one fungicidal active ingredient selected from benomyl, carboxin, captan, chlorothalonil, copper oxychloride, cyprodinil, dimethomorph, dithianon, dodine, famoxadone, fenhexamid, fenpiclonil, fenpropimorph, fluazinam, mancozeb, metalaxyl, pyrimethanil, quinoxifen, sulfur, triforine, vinclozolin, a fungicidal triazole derivative, and a synthetic strobilurine derivative. The invention also provides a method of controlling the growth of phytopathogenic fungi at a locus by applying synergistically effective amounts of at least one azolopyrimidine of formula I and at least one fungicidal active ingredient (b) to the locus.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Henry Van Tuyl Cotter, Leslie May, Gunter Reichert, Ewald Sieverding
  • Method for drying and producing microporous particles
    Patent number: 6516537
    Abstract: In a process for drying microporous, fluid-containing particles, the fluid-containing particles to be dried are fed as a moving bed countercurrently to a drying fluid, the interfacial tension of the fluid being reduced in comparison with the interfacial tension of the fluid at room temperature, at near-critical to supercritical pressure of the fluid, preferably to a value in the range from 0 to {fraction (1/10)}, in particular from 0 to {fraction (1/20)}, of the interfacial tension at room temperature. Furthermore, microporous, three-dimensionally networked particles are prepared by a process comprising preparation of microporous particles containing pore liquid, exchange of the pore liquid in the particles for a fluid and drying of the fluid-containing particles, the exchange and drying being carried out in the moving bed by the countercurrent method.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedhelm Teich, Heiner Schelling, Herbert Köster, Horst Kratzer, Wolfgang Reichert, Martin Gall, Bernd Ziegler
  • Method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization
    Patent number: 6518453
    Abstract: In a process for stabilizing chemical compounds having at least one ethylenically unsaturated bond to undesired free radical polymerization, a nitroxyl radical and a chemical compound containing phosphorus in chemically bonded form are added to the unsaturated compound present as pure substance or as a component of a mixture.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Gerhard Wagenblast, Volker Schliephake, Jürgen Schröder, Klaus Joachim Müller-Engel, Harald Keller, Thomas Jaworek
  • Thermoplastic molding compositions
    Patent number: 6518361
    Abstract: Thermoplastic molding compositions are made from A) from 20 to 98% by weight of a particulate graft polymer and a non-elastomeric graft shell B) from 0.5 to 78.5% by weight of a thermoplastic styrene polymer or copolymer C) from 1 to 79% by weight of a second styrene copolymer and D) from 0.5 to 30% by weight of an isobutene polymer.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Güntherberg, Martin Weber, Gerhard Lindenschmidt, Hans Peter Rath
  • Shaped catalysts
    Patent number: 6518220
    Abstract: Shaped catalysts for heterogeneously catalyzed reactions are in the form of hollow cylinders or annular tablets whose end faces are rounded both to the outer edge and to the edge of the central hole, i.e. have no right-angled edges.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Walsdorff, Otto Hofstadt, Raimund Felder, Ruprecht Meissner, Klaus Harth
  • Method of producing rubber compositions in styrene solutions with sterically superior chelate catalysts
    Patent number: 6518379
    Abstract: In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an alkylating agent and, if desired, a regulator. This process can be used for preparing high-impact polystyrene, acrylonitrile-butadiene-styrene copolymers or methyl methacrylate-butadiene-styrene copolymers.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Jüngling, Christian Schade, Hermann Gausepohl, Volker Warzelhan, Rainer Moors, Hansjörg Schäch, Joachim Queisser, Gerrit Luinstra, Jürgen Demeter
  • Supply system for transferring a fluid to a container
    Patent number: 6517057
    Abstract: A supply system for feeding a fluid to a vessel (1) is described, which is provided with a feedline (10), having a reservoir which is filled with the fluid and a compressed-gas store (14) which can be brought into communication with this reservoir (13), in which system the reservoir (13) and the compressed-gas store (14) are arranged in immediate proximity to one another, and wherein the reservoir (13) can, when required, be brought into communication with the feedline (10) via connection pieces (11, 12).
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Aichinger, Michael Fried, Gerhard Nestler, Oliver Odenwald
  • Continuous process for the preparation of acetals
    Patent number: 6518464
    Abstract: The present invention relates to a continuous process for the preparation of unsaturated acetals by reacting olefinically unsaturated aliphatic compounds with allyl alcohols in a reaction column, where the reactants are only partially reacted in the reaction column, the resulting acetal is concentrated in at least two successive evaporation stages, and the recovered reactants are returned to the reaction column.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Jörg Therre, Gerd Kaibel, Werner Aquila, Günter Wegner, Hartwig Fuchs
  • Method for oxidizing an organic compound containing at least one C-C double bond
    Patent number: 6518441
    Abstract: A process for oxidizing an organic compound having at least one C—C double bond or a mixture of two or more thereof comprises the following steps: (I) preparing a hydroperoxide, (II) reacting an organic compound having at least one C—C double bond or a mixture of two or more thereof with the hydroperoxide prepared in step (I) in the presence of a zeolite catalyst, (III) regenerating the at least partially deactivated zeolite catalyst used in step (II), and (IV) conducting the reaction of step (II) using a zeolite catalyst containing the catalyst regenerated in step (III).
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Heinrich Grosch, Ulrich Müller, Andreas Walch, Norbert Rieber, Martin Fischer, Stefan Quaiser, Wolfgang Harder, Karsten Eller, Peter Bassler, Anne Wenzel, Gerd Kaibel, Achim Stammer, Jochem Henkelmann, Arnd Böttcher, Joaquim Henrique Teles, Michael Schulz, Gert Treiber
  • Method for producing highly reactive polyisobutenes
    Patent number: 6518373
    Abstract: Polyisobutenes are prepared by the continuous preparation process, by polymerizing isobutene in the presence of a catalyst comprising boron trifluoride and at least one cocatalyst in an inert organic solvent, a) a part of the reaction mixture obtained thereby being discharged continuously from the polymerization reactor, b) the catalyst being separated from the discharge and/or being deactivated in the discharge, and c) the solvent and any unconverted isobutene being separated from the discharge and recycled to the polymerization reactor, wherein the recycled solvent and, if present, the isobutene are subjected to a wash with water before recycling to the polymerization reactor and are then dried.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Peter Rath, Dieter Hahn, Gerhard Sandrock, Frans van Deyck, Bart Vander Straeten, Eddy De Vree
  • Heat curable binders
    Publication number: 20030027915
    Abstract: The invention relates to a process for preparing an aqueous polymer dispersion comprising
    Type: Application
    Filed: April 18, 2002
    Publication date: February 6, 2003
    Applicant: BASF Aktiengesellschaft
    Inventors: Matthias Gerst, Matthias Laubender, Bernd Reck
  • Heat exchanger with a reduced tendency to produce deposits and method for producing same
    Patent number: 6513581
    Abstract: The invention relates to a process for the production of a heat transfer device, which comprises electroless chemical deposition of a metal/polymer dispersion layer, in which the polymer is halogenated, on a heat transfer surface. The invention furthermore relates to a process for the production of a heat transfer device, wherein a metal/phosphorus layer with a thickness of from 1 to 15 &mgr;m is applied by electroless chemical deposition before application of the metal/polymer dispersion layer. The invention furthermore relates to a heat transfer device which can be produced by a process according to the invention, and to the use of a coating, produced by electroless chemical deposition of a metal/polymer dispersion layer, in which the polymer is halogenated, for reducing the tendency of the coated surfaces to accumulate solids from fluids, causing fouling.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: February 4, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Hüffer, Axel Franke, Stephan Scholl, Hans Mueller-Steinhagen, Qi Zhao, Bernd Diebold, Peter Dillmann
  • Gel purge formulations and methods of cleaning extruders by using the same
    Patent number: 6514922
    Abstract: Methods for cleaning screw extruder, especially powder-coating extruders, include filling the extruder barrel with a gel purge formulation comprised of a high-boiling pyrrolidone or piperidone (lactam) solvent (most preferably N-methyl pyrrolidone (NMP)), thickened with 5-50 wt. % of a thermoplastic resin thickening agent, most preferably polystyrene (PS). Once the extruder barrel is filled with the gel purge formulation, the screws are stopped and the gel allowed to soak for between about 10 to about 30 minutes. The screws are then restarted and the gel is discharged from the extruder. Immediately after the gel purge formulation exits the machine, a small amount of a thermoplastic “rinse” polymer (e.g., polyethylene) may be added so as to remove any vestigial amount of the gel purge formulation therefrom.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: February 4, 2003
    Assignee: BASF Corporation
    Inventor: Mark W. Waldrop