Patents Assigned to Degussa AG
  • Rubber mixtures
    Patent number: 6890981
    Abstract: Rubber mixtures which contain an organosilane of the general structure 1R2R3Si—R4—Z (I), wherein R1, R2 and R3 independently of one another are H, (C1-C4)alkyl, (C1-C4)alkoxy or halogen and the number of alkyl groups is ?1; R4 is a linear or branched (C1-C18)alkylidene group; and Z=H, halogen, SCN, SH or Sx—R4—SiR1R2R3, where x is 2 to 10. The rubber mixtures are useful in molding compositions particularly for tires and tire treads.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: May 10, 2005
    Assignee: Degussa AG
    Inventor: Hans-Detlef Luginsland
  • Glass prepared from pyrogenically prepared silicon dioxide
    Patent number: 6890873
    Abstract: Pyrogenically prepared silicon dioxide with the following physicochemical properties: 1. Average particle size (D50 value) D50?150 nm (dynamic light scattering, 30 wt %) 2. Viscosity (5 rpm, 30 wt %) ??100 m·Pas 3. Thixotropy of Ti (?(5 rpm))/(?(50 rpm))?2 4. BET surface area 30-60 m2/g 5. Compacted bulk=100-160 g/L 6. Original pH?4.5 that can be used for the preparation of dispersions and glass bodies.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: May 10, 2005
    Assignee: Degussa AG
    Inventors: Monika Oswald, Gerrit Schneider, Klaus Deller
  • Methods for producing amino acids in coryneform bacteria using an enhanced sigD gene
    Patent number: 6890744
    Abstract: The invention relates to an isolated polynucleotide from Corynebacterium glutamicum having a polynucleotide sequence which codes for the sigD gene, and a host-vector system having a coryneform host bacterium in which the sigD gene is present in enhanced form and a vector which carries at least the sigD gene according to SEQ ID No: 1, and the use of polynucleotides which comprise the sequences according to the invention as hybridization probes.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: May 10, 2005
    Assignee: Degussa AG
    Inventors: Brigitte Bathe, Caroline Kreutzer, Monika Martens, Mike Farwick, Thomas Hermann, Walter Pfefferle
  • High-reactivity liquid polyurethane systems which contain uretdione groups and can be cured at a low temperature
    Publication number: 20050096451
    Abstract: A high-reactivity liquid polyurethane composition which contains at least one uretdione group and cures at a low baking temperature can be used for producing plastics, particularly surface coatings and adhesives. The polyurethane composition contains A) at least one curing agent which contains at least one uretdione group and is obtained from i) an aliphatic polyisocyanate, a (cyclo)aliphatic polyisocyanate, a cycloaliphatic polyisocyanate or mixtures thereof, and ii) at least one hydroxyl-containing compound, the curing agent having a free NCO content of less than 5% by weight and a uretdione content of from 1 to 18% by weight; and B) at least one catalyst.
    Type: Application
    Filed: October 6, 2004
    Publication date: May 5, 2005
    Applicant: DEGUSSA AG
    Inventor: Emmanouil Spyrou
  • Low temperature curable polyurethane compositions containing uretdione groups
    Publication number: 20050096450
    Abstract: The invention relates to high-reactivity polyurethane compositions. The invention further relates to low temperature curable polyurethane compositions which contain uretdione groups, particularly useful for polyurethane powder coating compositions and adhesive compositions, and to processes for preparing and using the same.
    Type: Application
    Filed: October 6, 2004
    Publication date: May 5, 2005
    Applicant: DEGUSSA AG
    Inventors: Emmanouil Spyrou, Holger Loesch, Dirk Hoppe
  • Stabilizing agent
    Patent number: 6887939
    Abstract: The present invention relates to a stabilizing agent for polymers or copolymers which is a copolymer of ethylene or propylene (A) and a vinyl compound (B) having the formula: wherein X is O, NH or NR5; R1, R2 and R3 are each independently H, C1-C8 alkyl, C1-C8 substituted aryl; R4 is H, C1-C8 alkyl, C6-C12 cycloalkyl, C1-C10 acyl, C1-C10 acyloxy or C1-C8 alkyl ether; R5 is C1-C8 alkyl and wherein the copolymer has at least 1 mol % (B) and has an MFR2 of 1-1000 g/10 min.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: May 3, 2005
    Assignees: Degussa AG, Borealis A/S
    Inventors: Udo Jegelka, Jochen Kirchhoff, Thomas Hjertberg, Bill Gustafsson, Johan Linner, Annika Smedberg
  • Nucleotide sequences coding for the MtrA and/or MtrB proteins
    Publication number: 20050089986
    Abstract: The present invention provides nucleotide sequences from Coryneform bacteria which code for the MtrA and/or MtrB proteins and processes for the fermentative preparation of amino acids using bacteria in which the mtrA and/or mtrB genes are attenuated.
    Type: Application
    Filed: September 2, 2003
    Publication date: April 28, 2005
    Applicant: DEGUSSA AG
    Inventors: Brigitte Bathe, Natalie Schischka, Michael Bott, Steffen Schaffer
  • Low-temperature-curing epoxy-functional powder coating compositions
    Publication number: 20050090627
    Abstract: Epoxy-functional powder coating compositions which cure at low baking temperatures, a process for preparing such compositions, and their use for producing plastics, especially powder coatings, which crosslink at low baking temperatures to give high-gloss or matt, light-stable and weather-stable coating films.
    Type: Application
    Filed: October 7, 2004
    Publication date: April 28, 2005
    Applicant: DEGUSSA AG
    Inventors: Andreas Wenning, Emmanouil Sprou
  • Nucleotide sequences coding for the lysRI gene
    Publication number: 20050089976
    Abstract: The present invention relates to polynucleotides corresponding to the lysR1 gene and which encode a LysR1 transcriptional regulator, methods of producing L-amino acids, and methods of screening for polynucleotides which encode proteins having LysR3 transcriptional regulator activity.
    Type: Application
    Filed: June 22, 2004
    Publication date: April 28, 2005
    Applicant: Degussa AG
    Inventors: Bettina Moeckel, Mike Farwick, Thomas Hermann, Caroline Kreutzer, Walter Pfefferle
  • High-reactivity polyurethane powder coating compositions based on epoxy-terminated polyaddition compounds containing uretdione groups
    Publication number: 20050090636
    Abstract: Polyurethane powder coating compositions based on epoxy-terminated polyaddition compounds having uretdione groups, which cure at low baking temperatures, a process for preparing such compositions, and their use for producing plastics, especially polyurethane powder coatings, which crosslink at low baking temperatures to give high-gloss or matt, light-stable and weather-stable coating films.
    Type: Application
    Filed: October 14, 2004
    Publication date: April 28, 2005
    Applicant: DEGUSSA AG
    Inventors: Andreas Wenning, Emmanouil Spyrou
  • Method for producing amines by homogeneously catalyzed reductive amination of carbonyl compounds
    Patent number: 6884887
    Abstract: The invention relates to the preparation of chiral or achiral amines by reaction of aldehydes or ketones with ammonia or primary or secondary amines in the presence of hydrogen and in the presence of homogeneous metal catalysts under mild conditions. Metal catalysts which can be used are complexes of late transition metals with chiral or achiral phosphorus-containing ligands.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: April 26, 2005
    Assignee: Degussa AG
    Inventors: Thomas Riermeier, Karl-Josef Haack, Uwe Dingerdissen, Armin Boerner, Vitali Tararov, Renat Kadyrov
  • Molding composition based on polyetheramides
    Patent number: 6884485
    Abstract: A molding composition containing the following components: I. from 99.9 to 95 parts by weight of a polyetheramide obtained from 1) a linear aliphatic diamine having from 6 to 12 carbon atoms, 2) a linear aliphatic or aromatic dicarboxylic acid having from 6 to 12 carbon atoms, and 3) a polyetherdiamine having at least 3 carbon atoms per ethereal oxygen atom and having a primary amino group at an end of the chain, and II. from 0.1 to 5 parts by weight of a copolymer which contains from 0.8 to 20% by weight of an anhydride or an epoxide in copolymerized form, wherein the total amount of I. and II. is 100 parts by weight, is suitable for the extrusion of flexible pipes, and also for the production of flexible blow-molded articles.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: April 26, 2005
    Assignee: Degussa AG
    Inventors: Franz-Erich Baumann, Martin Himmelmann, Wilfried Bartz, Olivier Farges
  • Solid polyaddition compounds containing uretdione groups
    Publication number: 20050085615
    Abstract: Solid polyaddition compounds containing uretdione groups for polyurethane powder coating compositions which can be cured at a low temperature.
    Type: Application
    Filed: October 7, 2004
    Publication date: April 21, 2005
    Applicant: Degussa AG
    Inventors: Andreas Wenning, Emmanouil Spyrou
  • Dispersions of amorphous unsaturated polyester resins based on particular Dicidol isomers
    Patent number: 6881785
    Abstract: An aqueous dispersion based on an amorphous unsaturated polyester resin obtained by polycondensing a mixture of Dicidol isomers and one or more saturated and/or unsaturated dicarboxylic acids.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: April 19, 2005
    Assignee: Degussa AG
    Inventors: Patrick Glöckner, Martina Ortelt, Werner Andrejewski, Alessandro Cerri, Lutz Mindach, Stephan Kohlstruk
  • Catalyst for the synthesis of alkyl mercaptan and process for the production thereof
    Publication number: 20050080295
    Abstract: The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicant: Degussa AG
    Inventors: Hubert Redlingshofer, Christoph Weckbecker, Andreas Dorflein, Michael Ruckriegel
  • Preparation of ketone-formaldehyde resins
    Publication number: 20050080222
    Abstract: A process for preparing ketone-formaldehyde resins, especially acetophenone- and cyclohexanone-formaldehyde resins, having a low water content and high thermal stability and yellowing resistance, and a process for their production and their use.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicant: DEGUSSA AG
    Inventors: Werner Andrejewski, Andreas Wenning, Patrick Glockner
  • Method for the fermentative production of L-amino acids, using coryneform bacteria
    Publication number: 20050079588
    Abstract: L-amino acid is produced by fermenting a medium using coryneform bacteria in which one or more of the genes linked with a nitrogen metabolism and selected from the group consisting of amt, ocd, soxA and sumT is/are amplified.
    Type: Application
    Filed: September 16, 2004
    Publication date: April 14, 2005
    Applicants: DEGUSSA AG, FORSCHUNGSZENTRUM JUELICH GMBH
    Inventors: Georg Sindelar, Volker Wendisch, Hermann Sahm
  • Rubber pellets comprising silicatic and oxidic fillers
    Patent number: 6878759
    Abstract: The present invention provides a process, which includes: a) suspending: at least one filler selected from the group including silicatic filler, oxidic filler, and a mixture thereof, 0.5 to 7% by weight, based on the weight of the filler, of at least one polysiloxane hydrophobicizing agent, and 0.1 to 2% by weight, based on the weight of the filler, of at least one non-ionic surfactant, in water at a temperature of 10 to 60° C., to prepare a suspension having a solids content of 0.5 to 15% by weight, based on the weight of the suspension; b) contacting a rubber latex emulsion and the suspension, to prepare a mixture; c) contacting the mixture with at least one acid to lower the pH of the mixture to 2.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 12, 2005
    Assignee: Degussa AG
    Inventors: Udo Goerl, Reinhard Stober, Matthias Schmitt
  • Process for the epoxidation of propene
    Patent number: 6878836
    Abstract: A process for the continuous epoxidation of propene with hydrogen peroxide in the presence of a titanium silicalite catalyst and a methanol solvent, wherein the catalyst is periodically regenerated by washing with a methanol solvent at a temperature of at least 100° C. and the epoxidation reaction is carried out for periods of more than 300 h between two regeneration steps.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: April 12, 2005
    Assignees: Degussa AG, Uhde GmbH
    Inventors: Thomas Haas, Claudia Brasse, Wolfgang Wöll, Willi Hofen, Bernd Jaeger, Guido Stochniol, Norbert Ullrich
  • Nucleotide sequences which code for the MetD gene
    Publication number: 20050074802
    Abstract: The invention relates to polynucleotides comprising polynucleotide sequences corresponding to the metD gene and parts thereof that encode polypeptide sequences and parts thereof possessing varying degrees of MetD transcription regulator activity, methods for preparation of L-amino acids, and methods of screening and amplifying polynucleotides encoding polypeptide sequences which comprise varying degrees of MetD transcription regulator activity. Further, the invention relates to animal food additives based on fermentation liquor and containing L-methionine, and to the preparation of such additive.
    Type: Application
    Filed: September 9, 2004
    Publication date: April 7, 2005
    Applicant: DEGUSSA AG
    Inventors: Daniel Rey, Christian Rueckert, Joern Kalinowski, Alfred Puehler, Brigitte Bathe, Klaus Huthmacher, Walter Pfefferle