Patents by Inventor Reinhard Halpaap

Reinhard Halpaap 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).

  • Method of dimerizing isophorone diisocyanate
    Patent number: 6797800
    Abstract: The invention relates to a method of preparing a polyisocyanate with at least one uretdione group by oligomerizing part of the isocyanate groups of isophorone diisocyanate in the presence of a catalyst which accelerates the dimerization of isocyanate groups, wherein the oligomerization catalyst comprises a saline compound comprising from 10 to 100 wt. % of 1,2,3- and/or 1,2,4-triazolate structures (calculated as C2N3; molecular weight=66) in the anion, and the products prepared by this method.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: September 28, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Frank Richter, Jürgen Köcher
  • Highly functional polyisocyanate mixtures which are dispersible in water
    Patent number: 6777523
    Abstract: The invention relates to polyether-modified, water-dispersible polyisocyanate mixtures, a process for their production and their use as initial component in the production of polyurethane plastics.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: August 17, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Laas, Martin Brahm, Reinhard Halpaap
  • Modified polyisocyanates
    Patent number: 6767958
    Abstract: The present invention relates to a modified polyisocyanate which is the reaction product of a polyisocyanate with 2-(cyclohexylamino)-ethanesulfonic acid and/or 3-(cyclohexylamino)-propanesulfonic acid, to a process for preparing these modified polyisocyanates, to coating compositions containing these modified polyisocyanates and to coated substrates prepared from these coating compositions.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: July 27, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Laas, Reinhard Halpaap
  • Novel coating systems
    Publication number: 20040143083
    Abstract: The present invention concerns novel reactive one-component coating systems, a process for their production and their use in one-component polyurethane systems.
    Type: Application
    Filed: January 2, 2004
    Publication date: July 22, 2004
    Inventors: Christoph Gurtler, Hanno Brummer, Reinhard Halpaap, Jorg Tillack, Birgit Willwerth-Schwarten
  • 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
  • Low-monomer-content polyisocyanates containing uretdione groups
    Publication number: 20040110915
    Abstract: The invention relates to polyisocyanates which contain uretdione groups, have a particularly low monomer content and are stable towards redissociation and also to their use.
    Type: Application
    Filed: December 3, 2003
    Publication date: June 10, 2004
    Inventors: Frank Richter, Reinhard Halpaap, Hans-Josef Laas, Andreas Hecking
  • Preparation of polyisocyanates containing uretdione groups
    Publication number: 20040106789
    Abstract: The invention relates to the use of cycloalkylphosphines as catalysts for isocyanate dimerization and to a process for preparing polyisocyanates containing uretdione groups.
    Type: Application
    Filed: November 21, 2003
    Publication date: June 3, 2004
    Inventors: Frank Richter, Reinhard Halpaap, Hans-Josef Laas, Andreas Hecking
  • Blocked polyisocyanates that are stable to solidification
    Publication number: 20040097687
    Abstract: The present invention relates to novel storage-stable blocked polyisocyanates, to a process for their preparation and to their use in the production of polyurethane materials and coatings.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 20, 2004
    Inventors: Christoph Thiebes, Hans-Josef Laas, Reinhard Halpaap, Dorota Greszta-Franz
  • Composition comprising a blocked polyisocyanate
    Publication number: 20040072931
    Abstract: Use of a compound according to one of the formulae I to III 1
    Type: Application
    Filed: June 20, 2003
    Publication date: April 15, 2004
    Inventors: Christoph Thiebes, Christian Fussel, Reinhard Halpaap, Beate Baumbach, Joachim Petzoldt, Karsten Danielmeier
  • Process for the preparation of polyisocyanates with a biuret structure
    Patent number: 6720400
    Abstract: The present invention relates to an improved process for the continuous preparation of polyisocyanates with a biuret structure comprising the steps of continuously reacting excess amounts of organic diisocyanates having exclusively aliphatically and/or cycloaliphatically bound isocyanate groups with organic diamines having exclusively aliphatically and/or cycloaliphatically bound primary amino groups at temperatures above 170° C. and adding acid before or during the reaction.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: April 13, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Halpaap, Dieter Mager, Siegfried Oeckl, Harald Mertes
  • Dimethylpyrazole-blocked isocyanate mixtures
    Patent number: 6713556
    Abstract: The invention relates to particular mixtures of polyisocyanates which are blocked with 3,5-dimethylpyrazole, and to the use thereof as crosslinking component in single-component stoving lacquers, especially automotive clear lacquers.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: March 30, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eberhard König, Reinhard Halpaap, Thomas Klimmasch, Hans-Ulrich Meier-Westhues, Harald Mertes, Joachim Schüll, Bernd Steinhilber
  • Polyadducts containing uretdione groups
    Publication number: 20040059082
    Abstract: The invention relates to novel polyaddition compounds containing uretdione groups, to a process for preparing them and to their use as a starting component in the preparation of polyurethane plastics.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 25, 2004
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Peter Thometzek, Michael Grahl, Hans-Ulrich Meier-Westhues
  • Isocyanates containing uretdione groups
    Publication number: 20040049028
    Abstract: The invention relates to novel compounds containing uretdione groups, to a process for preparing them by dimerizing aliphatic and/or cycloaliphatic isocyanates containing exclusively secondary and/or tertiary isocyanate groups and also to the use of uretdione polyisocyanates obtainable by this process from diisocyanates containing exclusively secondary and/or tertiary isocyanate groups as a starting component for polyurethane polymers, in particular as an isocyanate component in the preparation of uretdione powder coating crosslinkers.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 11, 2004
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Frank Richter, Jurgen Kocher
  • Modified polyisocyanates
    Publication number: 20040034162
    Abstract: The invention relates to modified polyisocyanates and polyisocyanate mixtures, to a method for their production and to the use thereof as a starting component in the production of polyurethane synthetic materials, in particular as cross-linking agents for water-soluble or water-dispersible paint binding agents or components of binding agents, said agents containing groups that are capable of reacting with isocyanate groups.
    Type: Application
    Filed: November 14, 2002
    Publication date: February 19, 2004
    Inventors: Hans-Josef Laas, Reinhard Halpaap
  • Ionic liquids
    Publication number: 20030204041
    Abstract: The invention relates to novel ionic liquids, to a process for their preparation, and to their use as solvents or catalysts for chemical reactions, especially as catalysts for the oligomerisation of isocyanates.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 30, 2003
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Frank Richter, Jurgen Kocher
  • Dimethylpyrazole-blocked isocyanate mixtures
    Publication number: 20030171488
    Abstract: The invention relates to particular mixtures of polyisocyanates which are blocked with 3,5-dimethylpyrazole, and to the use thereof as crosslinking component in single-component stoving lacquers, especially automotive clear lacquers.
    Type: Application
    Filed: November 1, 2002
    Publication date: September 11, 2003
    Inventors: Eberhard Knig, Reinhard Halpaap, Thomas Klimmasch, Hans-Ulrich Meier-Westhues, Harald Mertes, Joachim Schll, Bernd Steinhilber
  • Method of preparing aliphatic polyisocyanates with uretdione, isocyanurate and iminooxadiazindione structures
    Patent number: 6590098
    Abstract: The invention relates to a method of preparing an aliphatic polyisocyanate by conversion of an aliphatic diisocyanate to a polyisocyanates in the presence of a catalyst, wherein the catalyst contains a saline compound having 5 to 97.1 wt. % of a 1,2,3- and/or a 1,2,4-triazolate (calculated as C2N3, molecular weight 66) in the anion, the isocyanates thus prepared and the polyurethane paints and coatings containing them.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: July 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Richter, Reinhard Halpaap, Jürgen Köcher, Hans-Josef Laas
  • Preparation and use of biuret-containing polyisocyanates as cross-linking agents for coatings
    Publication number: 20030109664
    Abstract: Biuret group-containing polyisocyanates are produced having an isocyanate functionality of at least 4 are prepared by reacting polyisocyanates having a functionality of at least 2.8 with water as the biuretizing agent. Most preferably water is used as the sole biuretizing agent. The preparation is useful as a curing agent in crosslinkable coating compositions. The coating composition can be used as an automotive clearcoat over a conventional pigmented basecoat, or as a basecoat or monocoat or even as a primer or sealer when a suitable amount of pigment is incorporated therein.
    Type: Application
    Filed: September 20, 2002
    Publication date: June 12, 2003
    Inventors: Jerome T. Adams, Robert J. Barsotti, Laura A. Lewin, Reinhard Halpaap, Dieter Mager, Myron W. Shaffer
  • Method of preparing aliphatic polyisocyanates with uretdione, isocyanurate and iminooxadiazindione structures
    Publication number: 20030078361
    Abstract: The invention relates to a method of preparing an aliphatic polyisocyanate by conversion of an aliphatic diisocyanate to a polyisocyanates in the presence of a catalyst, wherein the catalyst contains a saline compound having 5 to 97.1 wt. % of a 1,2,3- and/or a 1,2,4-triazolate (calculated as C2N3, molecular weight 66) in the anion, the isocyanates thus prepared and the polyurethane paints and coatings containing them.
    Type: Application
    Filed: May 13, 2002
    Publication date: April 24, 2003
    Inventors: Frank Richter, Reinhard Halpaap, Jurgen Kocher, Hans-Josef Laas
  • Method of dimerizing isophorone diisocyanate
    Publication number: 20030013872
    Abstract: The invention relates to a method of preparing a polyisocyanate with at least one uretdione group by oligomerizing part of the isocyanate groups of isophorone diisocyanate in the presence of a catalyst which accelerates the dimerization of isocyanate groups, wherein the oligomerization catalyst comprises a saline compound comprising from 10 to 100 wt. % of 1,2,3- and/or 1,2,4-triazolate structures (calculated as C2N3; molecular weight=66) in the anion, and the products prepared by this method.
    Type: Application
    Filed: May 13, 2002
    Publication date: January 16, 2003
    Inventors: Hans-Josef Laas, Reinhard Halpaap, Frank Richter, Jurgen Kocher