Patents by Inventor Wolfgang Schulz-Schlitte

Wolfgang Schulz-Schlitte 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: 6472497
    Abstract: Thermoplastic starch compositions formed by converting native starch or starch derivatives into thermoplastic starch by at least one hydrophobic biodegradable polymer that functions as a plasticizer for starch. The hydrophobic biodegradable polymer may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to less than about 5% by weight based on the weight of the mixture.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: October 29, 2002
    Assignee: Biotec Biologische Naturverpackungen & Co KG
    Inventors: Jurgen Loercks, Winfried Pommeranz, Harald Schmidt, Ralf Timmermann, Ernst Grigat, Wolfgang Schulz-Schlitte
  • Patent number: 6344535
    Abstract: Polyether ester amides having high water vapor permeability are disclosed. The amides which are prepared simply and reliably, crystallize quickly, are biodegradable and/or compostable, and are suitable in the manufacture of films by extrusion.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: February 5, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Timmermann, Wolfgang Schulz-Schlitte, Michael Voigt
  • Publication number: 20010039303
    Abstract: Thermoplastic starch compositions formed by converting native starch or starch derivatives into thermoplastic starch by at least one hydrophobic biodegradable polymer that functions as a plasticizer for starch. The hydrophobic biodegradable polymer may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to less than about 5% by weight based on the weight of the mixture.
    Type: Application
    Filed: April 30, 2001
    Publication date: November 8, 2001
    Inventors: Jurgen Loercks, Winfried Pommeranz, Harald Schmidt, Ralf Timmermann, Ernst Grigat, Wolfgang Schulz-Schlitte
  • Patent number: 6307003
    Abstract: The present invention relates to a compostable adhesive, to a method of producing the same, and to the use of the adhesive for the adhesive bonding of materials.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: October 23, 2001
    Assignees: Bayer AG, Biotec Biologische
    Inventors: Ernst Grigat, Karsten-Josef Idel, Uwe Westeppe, Wolfgang Schulz-Schlitte, Winfried Pommeranz, Jürgen Lörcks, Harald Schmidt
  • Patent number: 6235815
    Abstract: For converting native starch or starch derivatives into thermoplastic starch, added to the starch is at least one hydrophobic biodegradable polymer. This hydrophobic biodegradable polymer, which serves as a plasticizer or swelling agent, may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to <1% by weight based on the weight of the mixture.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: May 22, 2001
    Assignee: Bio-tec Biologische Naturverpackungen & Co. KG
    Inventors: Jurgen Loercks, Winfried Pommeranz, Harald Schmidt, Ralf Timmermann, Ernst Grigat, Wolfgang Schulz-Schlitte
  • Patent number: 6071984
    Abstract: This invention relates to reinforced thermoplastic moulding compositions prepared from biodegradable polymers, for example aliphatic or polyester amides, aliphatic polyester urethanes, and to the use thereof for the production of mouldings and to the mouldings, wherein the reinforcing materials are selected from wood flour, fibres of natural origin, minerals of natural origin, cellulose and cellulose derivatives.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: June 6, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst Grigat, Hanns Peter Muller, Wolfgang Schulz-Schlitte, Aziz El Sayed, Ralf Timmermann
  • Patent number: 5827905
    Abstract: This invention relates to reinforced thermoplastic moulding compositions prepared from biodegradable polymers, for example aliphatic or polyester amides, aliphatic polyester urethanes, and to the use thereof for the production of mouldings and to the mouldings, wherein the reinforcing materials are selected from wood flour, fibres of natural origin, minerals of natural origin, cellulose and cellulose derivatives.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: October 27, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst Grigat, Hanns Peter Muller, Wolfgang Schulz-Schlitte, Aziz El Sayed, Ralf Timmermann
  • Patent number: 5334692
    Abstract: New, highly branched polyphosphonates which have a greatly improved flame retardant action compared with known polyphosphonates which are suitable as additives for plastics. In addition the new polyphosphonates may be incorporated in plastics as stabilizers with excellent migration properties.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: August 2, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Hess, Wolfgang Schulz-Schlitte, Jurgen Kirsch, Dieter Freitag, Uwe Arndt, Hans-Georg Gehrke, Klaus Zander