Patents by Inventor Holger Leifheit

Holger Leifheit 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 repairing road surfacing systems, in particular for open-pore asphalts
    Patent number: 9221996
    Abstract: The present invention relates to a process for repairing top layers for roads, tracks, and other areas used by traffic, by applying an amount of at least 20 g/m2 of a polymeric material to the damaged site, applying an amount of at least 80 g/m2 of a first polyurethane reaction mixture (which can comprise additives) to the polymeric material, and applying, to the first polyurethane reaction mixture, a mixture comprising mineral aggregate and a second polyurethane reaction mixture, and allowing the material to harden. The present invention further relates to a repair kit for repairing top layers for roads, tracks, and other areas used by traffic.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: December 29, 2015
    Assignee: BASF SE
    Inventors: Franz Xaver Redl, Holger Leifheit, Thomas Stuehrenberg, Martin Lange
  • PROCESS FOR REPAIRING ROAD SURFACING SYSTEMS, IN PARTICULAR FOR OPEN-PORE ASPHALTS
    Publication number: 20130183094
    Abstract: The present invention relates to a process for repairing top layers for roads, tracks, and other areas used by traffic, by applying an amount of at least 20 g/m2 of a polymeric material to the damaged site, applying an amount of at least 80 g/m2 of a first polyurethane reaction mixture (which can comprise additives) to the polymeric material, and applying, to the first polyurethane reaction mixture, a mixture comprising mineral aggregate and a second polyurethane reaction mixture, and allowing the material to harden. The present invention further relates to a repair kit for repairing top layers for roads, tracks, and other areas used by traffic.
    Type: Application
    Filed: November 27, 2012
    Publication date: July 18, 2013
    Inventors: Franz Xaver Redl, Holger Leifheit, Thomas Stuehrenberg, Martin Lange
  • Low-emission polyurethane backing layer, spray polyurethane system for producing such a backing layer, and use of such a backing layer
    Patent number: 8299171
    Abstract: The present invention relates to a spray-polyurethane system which comprises a polyol component (A) and an isocyanate component (B), where the polyol component (A) comprises a1) at least one compound reactive with isocyanate, a2) at least one reactive chain extender having at least two groups reactive toward isocyanates, where at least one group reactive toward isocyanates is a free, primary NH2 group, and also a3) at least one metal catalyst, and a4) if appropriate, further additives, where the spray-polyurethane system comprises no amine catalyst. The present invention moreover relates to a process for production of a backing layer composed of polyurethane for moldings and to the use of this backing layer for production of automobile parts. Inventive backing layers have good mechanical properties, and low emissions, and their demolding time is small when compared with the open assembly time.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: October 30, 2012
    Assignee: BASF Aktiengesellschaft
    Inventors: Cord Schmalkuche, Udo Hadick, Holger Leifheit, Georg Partusch, Franz Xaver Redl
  • LOW-EMISSION POLYURETHANE BACKING LAYER, SPRAY POLYURETHANE SYSTEM FOR PRODUCING SUCH A BACKING LAYER, AND USE OF SUCH A BACKING LAYER
    Publication number: 20090326148
    Abstract: The present invention relates to a spray-polyurethane system which comprises a polyol component (A) and an isocyanate component (B), where the polyol component (A) comprises a1) at least one compound reactive with isocyanate, a2) at least one reactive chain extender having at least two groups reactive toward isocyanates, where at least one group reactive toward isocyanates is a free, primary NH2 group, and also a3) at least one metal catalyst, and a4) if appropriate, further additives, where the spray-polyurethane system comprises no amine catalyst. The present invention moreover relates to a process for production of a backing layer composed of polyurethane for moldings and to the use of this backing layer for production of automobile parts. Inventive backing layers have good mechanical properties, and low emissions, and their demolding time is small when compared with the open assembly time.
    Type: Application
    Filed: July 18, 2007
    Publication date: December 31, 2009
    Applicant: BASF SE
    Inventors: Cord Schmalkuche, Udo Hadick, Holger Leifheit, Georg Partusch, Franz Xaver Redl
  • Method for Producing Polyurethane Layers and Use Thereof as Imitation Leather
    Publication number: 20080214727
    Abstract: The invention concerns a process, preferably a solventless process, for producing a polyurethane layer and its use as artificial leather.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 4, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Wolfgang Pohl, Cord Schmalkuche, Holger Leifheit, Stefan Quaiser, Cheun-Gwo Chen, Wei Liang