Patents by Inventor Steffen Hofacker

Steffen Hofacker 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).

  • Patent number: 7473756
    Abstract: The present invention relates to low-viscosity oligocarbonate polyols, their preparation and use. The oligocarbonate polyols are based on diols of formula I below, which are used in combination with a further aliphatic polyol.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: January 6, 2009
    Assignee: Bayer MaterialScience AG
    Inventor: Steffen Hofacker
  • Publication number: 20080281025
    Abstract: The present invention relates to hybrid organic-inorganic polyisocyanates for the preparation of organic-inorganic coating compositions and adhesives.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 13, 2008
    Applicant: Bayer MaterialScience AG
    Inventors: Arno Nennemann, Steffen Hofacker, Markus Mechtel, Thomas Klimmasch
  • Patent number: 7420077
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 2, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Publication number: 20080102157
    Abstract: Flavored chewable foams for the oral care sector are produced from a polyurethane-polyurea and a sensorially active substance (e.g., taste substance and/or aroma substance) by foaming a polyurethane-urea dispersion, drying that dispersion and incorporating the sensorially active substance into the polyurethane-urea dispersion before, during or after foaming of the dispersion.
    Type: Application
    Filed: October 25, 2006
    Publication date: May 1, 2008
    Inventors: Steffen Hofacker, Thomas Feller, Thomas Michaelis, Sebastian Doerr, Dirk Schwannecke
  • Patent number: 7317121
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate polyols by transesterifying dimethyl carbonate (DMC) with an aliphatic polyol component.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: January 8, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Herbert Witossek, Lothar Bäcker
  • Publication number: 20070249745
    Abstract: The invention relates to novel chewable foams which are useful in the oral care sector and which are based on polyurethane-polyureas, to a method for the production of these novel chewable foams, and also to use thereof.
    Type: Application
    Filed: April 17, 2007
    Publication date: October 25, 2007
    Inventors: Steffen Hofacker, Thorsten Rische, Meike Niesten, Thomas Feller, Thomas Michaelis
  • Publication number: 20070243149
    Abstract: The present invention relates to a new aqueous binder system for nail varnishes, based on nitrocellulose-containing polyurethanepolyurea dispersions.
    Type: Application
    Filed: April 4, 2007
    Publication date: October 18, 2007
    Inventors: Steffen Hofacker, Thorsten Rische, Rainer Trinks, Sebastian Dorr, Werner Lange
  • Publication number: 20070219296
    Abstract: The invention relates to aqueous dispersions comprising nitrocellulose-polyurethane-polyurea particles, to a process for preparing them and to their use.
    Type: Application
    Filed: March 12, 2007
    Publication date: September 20, 2007
    Inventors: Rainer Trinks, Thorsten Rische, Thomas Feller, Steffen Hofacker, Harald Blum, Hans-Ulrich Meier-Westhues
  • Publication number: 20070219388
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Application
    Filed: May 21, 2007
    Publication date: September 20, 2007
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Backer, Herbert Witossek
  • Publication number: 20070219337
    Abstract: The invention relates to storage-stable isocyanate-functional prepolymers, to a process for the preparation, and also to their use as a starting component in the production of polyurethane plastics, of paints and coatings, of adhesives and of sealants.
    Type: Application
    Filed: March 13, 2007
    Publication date: September 20, 2007
    Inventors: Burkhard Kohler, Steffen Hofacker
  • Publication number: 20070167565
    Abstract: The invention relates to new, hydrolysis-stable, aqueous polyurethane-polyurea dispersions based on polyether-polycarbonate-polyols, to a process for preparing them and to their use in coating materials.
    Type: Application
    Filed: January 10, 2007
    Publication date: July 19, 2007
    Inventors: Thorsten Rische, Thomas Feller, Holger Casselmann, Gerald Kurek, Steffen Hofacker
  • Publication number: 20070166552
    Abstract: The present invention provides coating agents made up of the reaction product of a) a polycarbonatediol component comprising a1) a polytetramethylene glycol-based polycarbonatediol with a molecular weight of between 400 and 8000, and a2) optionally other polyols with a molecular weight of from 200 to 8000, b) 0.5-2.0 mol per mol of a) of a chain extender selected from the group consisting of a low-molecular weight aliphatic or cycloaliphatic diol, a low-molecular weight aliphatic or cycloaliphatic diamine, and hydrazine, and c) 1.5-3.0 mol per mol of a) of an aliphatic, cycloaliphatic or aromatic diisocyanate, dissolved in d) 40-90 percent by weight (based on the total formulation) of an organic solvent selected from the group consisting of linear or cyclic esters, ketones, alcohols, aromatic compounds and mixtures thereof.
    Type: Application
    Filed: January 10, 2007
    Publication date: July 19, 2007
    Inventors: Steffen Hofacker, Thomas Feller, Jurgen Kocher
  • Patent number: 7238825
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: July 3, 2007
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Publication number: 20060293468
    Abstract: Aqueous coating materials are provided. The materials comprise I) hydroxyl-free polyurethanes and/or polyurethane-ureas, II) ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, and III) at least one crosslinker, characterized in that the components (I) and (II) comprise polycarbonate polyols which have at least 25% by weight of 1,4-butanediol as synthesis component. A process for preparing the coating materials, and their use as soft feel paint, is also provided.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 28, 2006
    Inventors: Thorsten Rische, Thomas Munzmay, Torsten Pohl, Uwe Klippert, Steffen Hofacker
  • Publication number: 20060281857
    Abstract: Coating compositions comprising polyisocyanates, aliphatic oligocarbonate polyols and polyacrylate polyols are provided. The compositions comprise A) a polyol component composed of a) 1% to 50% by weight of aliphatic oligocarbonate polyols having a number-average molecular weight Mn of 200 to 5000 g/mol and b) 50% to 99% by weight of hydroxy-functional polyacrylate polyols; and B) one or more OH-reactive (poly)isocyanate crosslinkers having an average NCO functionality of ?2.0. A process for preparing the coatings are also provided.
    Type: Application
    Filed: June 7, 2006
    Publication date: December 14, 2006
    Inventors: Steffen Hofacker, Christian Wamprecht, Markus Mechtel, Nusret Yuva
  • Publication number: 20060241267
    Abstract: The present invention relates to low-viscosity oligocarbonate polyols, their preparation and use. The oligocarbonate polyols are based on diols of formula I below, which are used in combination with a further aliphatic polyol.
    Type: Application
    Filed: April 17, 2006
    Publication date: October 26, 2006
    Inventor: Steffen Hofacker
  • Publication number: 20060205857
    Abstract: The present invention relates to aqueous copolymer dispersions containing A) one or more hydroxy-functional copolymers synthesized from a) one or more OH-free (meth)acrylic esters and/or vinylaromatics, b) one or more hydroxy-functional (meth)acrylic esters, c) one or more ionic and/or potential ionic monomers capable of free-radical copolymerization, and d) one or more optionally monomers other than components a) to c) that are capable of free-radical copolymerization, and B) one or more hydroxy-functional polycarbonate polyols as reactive diluent. The present invention also relates to a process for preparing these aqueous copolymer dispersions and to their use in coating compositions.
    Type: Application
    Filed: March 6, 2006
    Publication date: September 14, 2006
    Inventors: Steffen Hofacker, Markus Mechtel, Thomas Munzmay, Nusret Yuva, Rolf Gertzmann
  • Patent number: 7060778
    Abstract: Ytterbium(III) acetylacetonate is used as a catalyst for the preparation of aliphatic oligocarbonate polyols by transesterification of at least one organic carbonate with at least one aliphatic polyol.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 13, 2006
    Assignee: Bayer Materialscience AG
    Inventor: Steffen Hofacker
  • Publication number: 20060079632
    Abstract: The present invention relates to weathering-stable mixtures for preparing organic-inorganic (hybrid) transparent topcoat materials. The hybrid composition comprises an inorganic binder based on polyfunctional organosilanes which contain at least 2 silicon atoms having in each case 1 to 3 alkoxy or hydroxyl groups, the silicon atoms being attached by in each case at least one Si—C bond to a structural unit that links the silicon unit; (semi)metal alkoxides and/or hydrolysis and concentration products of these; inorganic UV absorbers selected from the group consisting of ZnO and CeO2; an organic polyol; and one or more solvents.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 13, 2006
    Inventors: Steffen Hofacker, Markus Mechtel, Thomas Klimmasch
  • Publication number: 20060052572
    Abstract: The present invention relates to a process for preparing oligocarbonate polyols having a number average molecular weight of 500 to 5000 g/mol by reacting organic carbonates and aliphatic polyols in the presence of a metal acetylacetonate catalyst based on a metal which has an atomic number in the PTE of 39, 57, 59 to 69 or 71. The present invention also relates to the oligocarbonate polyols obtained by this process.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 9, 2006
    Inventor: Steffen Hofacker