Patents by Inventor Michael Schelhaas

Michael Schelhaas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing 5-nitro-3,4-dihydro-1(H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate
    Patent number: 7202378
    Abstract: The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: April 10, 2007
    Assignee: Bayer MaterialScience AG
    Inventors: Joachim Zechlin, Kai Verkerk, Dietmar Wastian, Katrin Joschek, Tim Loddenkemper, Wilfried Pinke, Michael Schelhaas, Georg Ronge
  • Elimination-free powder coating crosslinking agents
    Patent number: 7148374
    Abstract: The present invention relates to novel blocked, elimination-free polyurethane (PUR) crosslinking agents, to a process for their preparation and to their use as starting components for the production of polyurethane plastics, especially as crosslinking agents for thermally crosslinkable powder coatings.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: December 12, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dorota Greszta-Franz, Christoph Gürtler, Reinhard Halpaap, Michael Schelhaas, Michael Grahl
  • Process for producing 5-nitro-3,4-dihydro-1(H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate
    Publication number: 20060183946
    Abstract: The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.
    Type: Application
    Filed: April 7, 2006
    Publication date: August 17, 2006
    Inventors: Joachim Zechlin, Kai Verkerk, Dietmar Wastian, Katrin Joschek, Tim Loddenkemper, Wilfried Pinke, Michael Schelhaas, Georg Ronge
  • Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate
    Publication number: 20060178526
    Abstract: The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.
    Type: Application
    Filed: April 7, 2006
    Publication date: August 10, 2006
    Inventors: Joachim Zechlin, Kai Verkerk, Dietmar Wastian, Katrin Joschek, Tim Loddenkemper, Wilfried Pinke, Michael Schelhaas, Georg Ronge
  • Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate
    Patent number: 7057071
    Abstract: The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: June 6, 2006
    Assignee: Bayer MaterialScience AG
    Inventors: Joachim Zechlin, Kai Verkerk, Dietmar Wastian, Katrin Joschek, Tim Loddenkemper, Wilfried Pinke, Michael Schelhaas, Georg Ronge
  • Reactive systems, their preparation and their use
    Patent number: 7057003
    Abstract: The invention relates to novel blocked polyurethane prepolymers, to a process for their preparation, to reactive systems prepared therefrom that cure at room temperature, and to their use.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: June 6, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kamelia Detig-Karlou, Joachim Simon, Michael Mager, Thomas Stingl, Christoph Gürtler, Michael Schelhaas
  • Adhesive compositions containing blocked polyurethane prepolymers
    Publication number: 20060069225
    Abstract: The present invention relates to reactive compositions containing A) one or more blocked polyurethane prepolymers which have a content of blocked isocyanate groups (calculated as NCO) of 0.1 to 20 wt. % and are prepared from i) at least one aromatic, aliphatic, araliphatic and/or cycloaliphatic diisocyanate having a content of free NCO groups of 5 to 60 wt.
    Type: Application
    Filed: September 2, 2005
    Publication date: March 30, 2006
    Inventors: Matthias Wintermantel, Christoph Gurtler, Michael Schelhaas, Rainer Trinks, Walter Meckel
  • Blocked polyisocyanates
    Patent number: 6843933
    Abstract: Blocked polyisocyanates, their preparation and use in one-component coating materials. In organic polyisocyanates having at least two isocyanate groups, the isocyanate groups are blocked with OH acidic cyclic ketones of the general formula (I). The blocked polyisocyanate system of the invention reacts without elimination of the blocking agent and possesses low crosslinking temperatures.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: January 18, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Christoph Gürtler, Beate Baumbach, Christian Füssel
  • Cyclic ketones as blocking agents
    Patent number: 6827875
    Abstract: The present invention relates to new blocked polyisocyanates with which high-grade, emission-free coatings and lacquer coatings with reduced yellowing values can be obtained, to a method of producing them, and to the use thereof in one-component polyurethane systems, particularly as crosslinking agents in automobile primer surfacers.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: December 7, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Christoph Gürtler
  • Process for producing aliphatic tricarbonitriles
    Patent number: 6790976
    Abstract: The present invention relates to a process for producing tricarbonitriles corresponding to formula I wherein n is an integer from 2 to 11 by forming an intermediate in the presence of a strong base in a first stage from an aliphatic &agr;-&ohgr;-dinitrile corresponding to formula II wherein n is an integer from 3 to 12, and reacting the intermediate in a second stage to form a trinitrile corresponding to formula I by the addition of acrylonitrile.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: September 14, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Manfred Jautelat
  • Reactive systems, their preparation and their use
    Publication number: 20040147704
    Abstract: The invention relates to novel blocked polyurethane prepolymers, to a process for their preparation, to reactive systems prepared therefrom that cure at room temperature, and to their use.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 29, 2004
    Inventors: Kamelia Detig-Karlou, Joachim Simon, Michael Mager, Thomas Stingl, Christoph Gurtler, Michael Schelhaas
  • Elimination-free powder coating crosslinking agents
    Publication number: 20040133035
    Abstract: The present invention relates to novel blocked, elimination-free polyurethane (PUR) crosslinking agents, to a process for their preparation and to their use as starting components for the production of polyurethane plastics, especially as crosslinking agents for thermally crosslinkable powder coatings.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 8, 2004
    Inventors: Dorota Greszta-Franz, Christoph Gurtler, Reinhard Halpaap, Michael Schelhaas, Michael Grahl
  • Dual cure systems
    Publication number: 20040132909
    Abstract: The present invention concerns new dual cure systems and polyisocyanate crosslinking agents, a process for their production and their use.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 8, 2004
    Inventors: Jan Weikard, Christoph Gurtler, Wolfgang Fischer, Diethelm Rappen, Michael Schelhaas
  • Process for the production of 1,5-naphthalenediamine
    Patent number: 6706924
    Abstract: The invention relates to a process for the production of 1,5-naphthalenediamine and to the intermediates 4-(2-nitrophenyl)butyronitrile, 5-nitro-3,4-dihydro-1(2H)-naphthyl-imine, 5-nitroso-1-naphthylamine, 5-nitro-1-naphthylamine, 4-(2-aminophenyl)-butyronitrile, 5-amino-3,4-dihydro-1(2H)-naphthalene imine, 4-(2-nitrophenyl)ethyl butyrate and 4-(2-nitrophenyl)butyramide obtainable during the process.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 16, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Katrin Joschek, Manfred Jautelat, Joachim Zechlin, Dietmar Wastian
  • Blocked polyisocyanates
    Publication number: 20040030086
    Abstract: Blocked polyisocyanates, their preparation and use in one-component coating materials. In organic polyisocyanates having at least two isocyanate groups, the isocyanate groups are blocked with OH acidic cyclic ketones of the general formula (I). The blocked polyisocyanate system of the invention reacts without elimination of the blocking agent and possesses low crosslinking temperatures.
    Type: Application
    Filed: June 10, 2003
    Publication date: February 12, 2004
    Inventors: Michael Schelhaas, Christoph Gurtler, Beate Baumbach, Christian Fussel
  • Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate
    Publication number: 20030229252
    Abstract: The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 11, 2003
    Inventors: Joachim Zechlin, Kai Verkerk, Dietmar Wastian, Katrin Joschek, Tim Loddenkemper, Wilfried Pinke, Michael Schelhaas, Georg Ronge
  • Process for preparing 4,5-dihydro-1,3-thiazoles
    Publication number: 20030078433
    Abstract: The present invention relates to an improved and more economical process for the synthesis of 4,5-dihydro-1,3-thiazoles carried out in a single vessel without the isolation of intermediates.
    Type: Application
    Filed: August 28, 2002
    Publication date: April 24, 2003
    Inventors: Katrin Joschek, Anton Vidal-Ferran, Manfred Jautelat, Michael Schelhaas
  • Cyclic ketones as blocking agents
    Publication number: 20030026999
    Abstract: The present invention relates to new blocked polyisocyanates with which high-grade, emission-free coatings and lacquer coatings with reduced yellowing values can be obtained, to a method of producing them, and to the use thereof in one-component polyurethane systems, particularly as crosslinking agents in automobile primer surfacers.
    Type: Application
    Filed: June 28, 2002
    Publication date: February 6, 2003
    Inventors: Michael Schelhaas, Christoph Gurtler
  • Preparation of aliphatic &agr;, &ohgr;-dicarboxylic acids
    Patent number: 6437180
    Abstract: A process for preparing aliphatic C4-18 &agr;,&ohgr;-dicarboxylic acids by oxidation of C6-20 &agr;,&ohgr;-dienes with hydrogen peroxide or compounds which release hydrogen peroxide under the reaction conditions as is characterized in that the reaction is carried out in the presence of a transition metal catalyst of group VI and of a mixture containing at least one organic acid and one aprotic organic solvent. A specific temperature profile is maintained at different phases of the reaction, which increases yield and selectivity.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: August 20, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Helmut Greiving, Manfred Jautelat
  • Process for the production of 1,5-naphthalenediamine
    Publication number: 20020103401
    Abstract: The invention relates to a process for the production of 1,5-naphthalenediamine and to the intermediates 4-(2-nitrophenyl)butyronitrile, 5-nitro-3,4-dihydro-1(2H)-naphthyl-imine, 5-nitroso-1-naphthylamine, 5-nitro-1-naphthylamine, 4-(2-aminophenyl)-butyronitrile, 5-amino-3,4-dihydro-1(2H)-naphthalene imine, 4-(2-nitrophenyl)ethyl butyrate and 4-(2-nitrophenyl)butyramide obtainable during the process.
    Type: Application
    Filed: December 18, 2001
    Publication date: August 1, 2002
    Inventors: Michael Schelhaas, Katrin Joschek, Manfred Jautelat, Joachim Zechlin, Dietmar Wastian