Patents by Inventor Burkhard Köhler

Burkhard Köhler 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: 11149145
    Abstract: This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: October 19, 2021
    Assignees: Covestro LLC, Covestro Deutschland AG
    Inventors: Rick L. Adkins, Jack R. Reese, Thomas Ernst Müller, Christoph Gürtler, Urs Rauwald, Muhammad Afzal Subhani, Verena Jakoby, Burkhard Köhler, Walter Leitner
  • Publication number: 20210292478
    Abstract: Provided herein is a process for preparing a heterocycle-functional polyoxyalkylene polyol, in which a polyoxyalkylene polyol having unsaturated groups is reacted with a heterocyclic compound. Also provided herein is a heterocycle-functional polyoxyalkylene polyol, a method of crosslinking a heterocycle-functional polyoxyalkylene polyol, a crosslinked, heterocycle-functional polyoxyalkylene polyol, and related processes.
    Type: Application
    Filed: July 16, 2019
    Publication date: September 23, 2021
    Inventors: Daniela Cozzula, Burkhard Köhler, Muhammad Afzal Subhani, Piotr Putaj, Walter Leitner, Thomas Ernst Mueller, Christoph Guertler, Volker Marker
  • Patent number: 11098154
    Abstract: A process for preparing a phosphorus-functional polyethercarbonate polyol, comprising reacting a polyethercarbonate polyol having unsaturated groups with a phosphorus-functional compound of formula (Ia): wherein X=O or S; and wherein R1 and R2 are selected from the group consisting of C1-C22 alkyl, C1-C22 alkoxy, C1-C22 alkylsulfanyl, C6-C70 aryl, C6-C70 aryloxy, C6-C70 arylsulfanyl, C7-C70 aralkyl, C7-C70 aralkyloxy, C7-C70 aralkylsulfanyl, C7-C70 alkylaryl, C7-C70 alkylaryloxy, C7-C70 alkylarylsulfanyl, or wherein R1 and R2 are bridged to one another directly and/or via heteroatoms and are selected from the group consisting of C1-C22 alkylene, oxygen, sulfur, and NR5, wherein R5 is hydrogen, C1-C22 alkyl, C1-C22 acyl, C7-C22 aralkyl, or C6-C70 aryl radical. A process for preparing a phosphorus-functional polyurethane polymer is disclosed.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: August 24, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas Ernst Mueller, Christoph Guertler, Kai Laemmerhold, Muhammad Afzal Subhani, Burkhard Koehler, Walter Leitner
  • Patent number: 11098153
    Abstract: The present invention relates to a method for producing a prepolymer that contains carbon-carbon multiple bonds, a polyol component A) being reacted with component B) that contains isocyanate groups and the polyol component comprising a polyether carbonate polyol that contains carbon-carbon multiple bonds.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: August 24, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Muhammad Afzal Subhani, Burkhard Koehler, Walter Leitner, Thomas Ernst Müller, Christoph Gürtler
  • Publication number: 20210147623
    Abstract: A process for preparing halogen-containing polyoxyalkylenepolyols, comprising the step of reacting an alkylene oxide with carbon dioxide in the presence of an H-functional starter compound and of a double metal cyanide catalyst, wherein the reaction is also conducted in the presence of an ?,?-epoxy-?-haloalkane.
    Type: Application
    Filed: June 27, 2018
    Publication date: May 20, 2021
    Inventors: Thomas Ernst Mueller, Christoph Guertler, Daniela Cozzula, Burkhard Köhler, Muhammad Afzal Subhani, Walter Leitner
  • Publication number: 20200377652
    Abstract: A method for preparing polyoxyalkylene monomers, comprising the step of the reaction of one or more H-functional starter substance(s), one or more alkylene oxides and carbon dioxide in the presence of a DMC catalyst is characterized in that at least one of the H-functional starter substance(s) comprises a carbon-carbon double bond, wherein the carbon-carbon double bond is part of a cyclic structure. The macromonomers obtained can be used in a method for preparing polyoxyalkylene brush polymers, wherein this method comprises the step of the reaction with an olefin metathesis catalyst. The polyoxyalkylene brush polymers obtained may subsequently be crosslinked.
    Type: Application
    Filed: November 20, 2018
    Publication date: December 3, 2020
    Inventors: Thomas Ernst Mueller, Christoph Guertler, Muhammad Afzal Subhani, Burkhard Köhler, Walter Leitner
  • Patent number: 10722609
    Abstract: The present invention relates to a method that includes providing a formulation having an isocyanate-functional prepolymer and a curing component comprising an amino-functional aspartic ester of the general formula (I) applying the formulation to a cell tissue; and curing the formulation such that the loss of blood (haemostatic) or tissue fluids is staunched or leaks in cell tissues are sealed.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: July 28, 2020
    Assignee: Adhesys Medical GmbH
    Inventors: Heike Heckroth, Burkhard Köhler, Sebastian Dörr
  • Publication number: 20200087511
    Abstract: This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 19, 2020
    Inventors: Rick L. ADKINS, Jack R. Reese, Thomas Ernst Müller, Christoph Gürtler, Urs Rauwald, Muhammad Afzal Subhani, Verena Jakoby, Burkhard Köhler, Walter Leitner
  • Publication number: 20200046875
    Abstract: The present invention relates to a method that includes providing a formulation having an isocyanate-functional prepolymer and a curing component comprising an amino-functional aspartic ester of the general formula (I) applying the formulation to a cell tissue; and curing the formulation such that the loss of blood (haemostatic) or tissue fluids is staunched or leaks in cell tissues are sealed.
    Type: Application
    Filed: June 25, 2019
    Publication date: February 13, 2020
    Applicant: Adhesys Medical GmbH
    Inventors: Heike Heckroth, Burkhard KÖHLER, Sebastian DÖRR
  • Publication number: 20200048402
    Abstract: A process for preparing a phosphorus-functional polyethercarbonate polyol, comprising reacting a polyethercarbonate polyol having unsaturated groups with a phosphorus-functional compound of formula (Ia): wherein X=O or S; and wherein R1 and R2 are selected from the group consisting of C1-C22 alkyl, C1-C22 alkoxy, C1-C22 alkylsulfanyl, C6-C70 aryl, C6-C70 aryloxy, C6-C70 arylsulfanyl, C7-C70 aralkyl, C7-C70 aralkyloxy, C7-C70 aralkylsulfanyl, C7-C70 alkylaryl, C7-C70 alkylaryloxy, C7-C70 alkylarylsulfanyl, or wherein R1 and R2 are bridged to one another directly and/or via heteroatoms and are selected from the group consisting of C1-C22 alkylene, oxygen, sulfur, and NR5, wherein R5 is hydrogen, C1-C22 alkyl, C1-C22 acyl, C7-C22 aralkyl, or C6-C70 aryl radical. A process for preparing a phosphorus-functional polyurethane polymer is disclosed.
    Type: Application
    Filed: April 3, 2018
    Publication date: February 13, 2020
    Inventors: Thomas Ernst Mueller, Christoph Guertler, Kai Laemmerhold, Muhammad Afzal Subhani, Burkhard Koehler, Walter Leitner
  • Patent number: 10526484
    Abstract: This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: January 7, 2020
    Assignees: Covestro LLC, Covestro Deutschland AG
    Inventors: Rick L. Adkins, Jack R. Reese, Thomas Ernst Müller, Christoph Gürtler, Urs Rauwald, Muhammad Afzal Subhani, Verena Jakoby, Burkhard Köhler, Walter Leitner
  • Publication number: 20190315904
    Abstract: The present invention relates to a method for producing a prepolymer that contains carbon-carbon multiple bonds, a polyol component A) being reacted with component B) that contains isocyanate groups and the polyol component comprising a polyether carbonate polyol that contains carbon-carbon multiple bonds.
    Type: Application
    Filed: October 10, 2017
    Publication date: October 17, 2019
    Inventors: Muhammad Afzal SUBHANI, Burkhard KOEHLER, Walter LEITNER, Thomas Ernst MÜLLER, Christoph GÜRTLER
  • Patent number: 10391198
    Abstract: The present invention relates to a method that includes providing a formulation having an isocyanate-functional prepolymer and a curing component comprising an amino-functional aspartic ester of the general formula (I) applying the formulation to a cell tissue; and curing the formulation such that the loss of blood (haemostatic) or tissue fluids is staunched or leaks in cell tissues are sealed.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: August 27, 2019
    Assignee: Adhesys Medical GmbH
    Inventors: Heike Heckroth, Burkhard Köhler, Sebastian Dörr
  • Patent number: 10385167
    Abstract: The present invention relates to polyoxazolidinone compounds, a method for the production of polyoxazolidinone compounds, comprising the step of reacting a biscarbamate compound with a bisepoxide compound in the presence of a mono-carbamate, a mono-isocyanate and/or a mono-epoxide compound as chain regulator and a suitable base having a pKb value of ?9 as catalyst. The invention further relates to the use of polyoxazolidinone compounds with high thermal stability.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: August 20, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Ernst Müller, Christoph Gürtler, Susmit Basu, Claudine Rangheard, David Rivillo, Walter Leitner, Burkhard Köhler
  • Patent number: 10358526
    Abstract: The present invention relates to a method for producing polyether carbonates containing alkoxysilyl groups in which (a) an unsaturated polyether carbonate polyol is reacted with (b) an alkoxysilane compound of formula (II) Si(X)m(R1)n(R2)o (II), where X?H, Y—S—H and Y=C1-C22 alkylene, C6-C14 arylene, C7-C14 aralkylene, C7-C14 alkylarylene; R1=C1-C8 alkoxy, C7-C20-aralkoxy, C6-C14 aroxy, C7-C20 alkylaroxy; R2=C1-C22 alkyl, C6-C14 aryl, C7-C14 aralkyl, C7-C14 alkylaryl, and m and n represent, independently of one another, an integer ?1, o is zero or an integer ?1 and m+n+o=4. The invention further relates to the production of a polyurethane polymer using such a polyether carbonate, a cross-linked, siloxane group containing polymer and a molded part containing or consisting of said cross-linked polymer.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: July 23, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Ernst Müller, Christoph Gürtler, Muhammad Afzal Subhani, Burkhard Koehler
  • Publication number: 20190185666
    Abstract: This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 20, 2019
    Inventors: Rick L. Adkins, Jack R. Reese, Thomas Ernst Müller, Christoph Gürtler, Urs Rauwald, Muhammad Afzal Subhani, Verena Jakoby, Burkhard Köhler, Walter Leitner
  • Publication number: 20190030206
    Abstract: The present invention relates to a method that includes providing a formulation having an isocyanate-functional prepolymer and a curing component comprising an amino-functional aspartic ester of the general formula (I) applying the formulation to a cell tissue; and curing the formulation such that the loss of blood (haemostatic) or tissue fluids is staunched or leaks in cell tissues are sealed.
    Type: Application
    Filed: October 1, 2018
    Publication date: January 31, 2019
    Inventors: Heike HECKROTH, Burkhard KÖHLER, Sebastian DÖRR
  • Patent number: 10179835
    Abstract: The present invention relates to a method for producing polyether carbonate polyols, the polyether carbonate polyols having electron-poor and electron-rich double bonds, said method preferably comprising the steps of (a) providing a suspending agent and/or an H-functional starter compound and a DMC catalyst, 03) adding at least one epoxide and (y) adding carbon dioxide, an epoxide that does not contain an unsaturated group, and at least two unsaturated compounds, the unsaturated compounds in method step (y) being selected from the group comprising unsaturated epoxides and unsaturated cyclic anhydrides, and one of the unsaturated compounds having an electron-rich double bond and one of the unsaturated compounds having an electron-poor double bond. The invention also relates to the crosslinking of polyether carbonate polyols, the polyether carbonate polyols having electronpoor and electron-rich double bonds, and to the crosslinked polyether carbonates obtainable therefrom.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: January 15, 2019
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas E. Müller, Christoph Gürtler, Muhammad A. Subhani, Burkhard Köhler, Walter Leitner
  • Patent number: 10167364
    Abstract: The present invention relates to a process for preparing aromatic polycarbonates, comprising the step of reacting bisphenols with dithiocarbonates or selenium analogs thereof in the presence of a catalyst. It further relates to the use of dithiocarbonates or selenium analogs thereof as transesterifying reagents for the preparation of polycarbonates.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: January 1, 2019
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas Ernst Müller, Christoph Gürtler, Nicolai Kolb, Burkhard Köhler, Walter Leitner, Jan Heijl, Alexandra Große Böwing
  • Patent number: 10117963
    Abstract: The present invention relates to a method that includes providing a formulation having an isocyanate-functional prepolymer and a curing component comprising an amino-functional aspartic ester of the general formula (I) applying the formulation to a cell tissue; and curing the formulation such that the loss of blood (haemostatic) or tissue fluids is staunched or leaks in cell tissues are sealed.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: November 6, 2018
    Assignee: Adhesys Medical GmbH
    Inventors: Heike Heckroth, Burkhard Köhler, Sebastian Dörr