Patents by Inventor Christian Wamprecht

Christian Wamprecht 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).

  • Publication number: 20200223973
    Abstract: Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH2)n, R1 and R2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of ?400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.
    Type: Application
    Filed: March 25, 2020
    Publication date: July 16, 2020
    Inventors: Heike HECKROTH, Hartmut NEFZGER, Christian WAMPRECHT
  • Patent number: 10633481
    Abstract: Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH2)n, R1 and R2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of ?400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: April 28, 2020
    Assignee: Adhesys Medical GmbH
    Inventors: Heike Heckroth, Hartmut Nefzger, Christian Wamprecht
  • Publication number: 20200040128
    Abstract: The present invention relates to aliphatic, lightfast thermoplastic polyurethanes having improved blooming behaviour, good heat resistance and fast industrial processability, and the preparation and use thereof.
    Type: Application
    Filed: April 18, 2018
    Publication date: February 6, 2020
    Inventors: Christian WAMPRECHT, Christoph IRLE
  • Patent number: 10435501
    Abstract: The invention also relates to thermoplastic polyurethanes and to a method for the production and use thereof.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: October 8, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Christian Wamprecht, Christoph Gürtler
  • Publication number: 20190226123
    Abstract: The invention relates to melt spun multifilaments based on thermoplastic polyurethane, their production and the use of said melt spun multifilaments to produce technical textiles and clothing such as socks, stockings, compression textiles like medical bandage, surgical hose, orthopedic elastic bandage, sport textiles, underwear etc.
    Type: Application
    Filed: September 8, 2017
    Publication date: July 25, 2019
    Inventors: Christian WAMPRECHT, Jochen NORWIG, Christoph GÜRTLER, Pavan MANVI, Gunnar SEIDE, Thomas GRIES
  • Patent number: 10238531
    Abstract: The present invention relates to a novel thermoplastic polyurethane (TPU) elastomer, T-frames made thereof as well as the use of the new TPU in manufacturing of T-frames for intrauterine systems for contraception and therapy.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: March 26, 2019
    Assignee: Bayer Oy
    Inventors: Taina Tjäder, Nina Stenroos, Christian Wamprecht, Wolfgang Kaufhold
  • Patent number: 9949869
    Abstract: The present invention relates to novel intrauterine systems and to methods for manufacturing these systems. An intrauterine system according to the invention comprises a reservoir and a continuous, closed and flexible frame. The frame comprises a thermoplastic polyurethane elastomer made of a polycarbonate diol, 1,6-hexamethylenediisocyanate, and a chain extender.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: April 24, 2018
    Assignee: BAYER OY
    Inventors: Taina Tjäder, Ulla Calvo Alonso, Pirjo Inki, Harri Jukarainen, Ilkka Jutila, Pirjo Kortesuo, Juha Lehtinen, Eeva Lukkari-Lax, Heikki Lyytikäinen, Joachim Moede, Hannu Nikander, Pirjo Sallinen, Faisal Shafiq, Wolfgang Kaufhold, Christian Wamprecht
  • Publication number: 20170333246
    Abstract: The present invention relates to a novel thermoplastic polyurethane (TPU) elastomer, T-frames made thereof as well as the use of the new TPU in manufacturing of T-frames for intrauterine systems for contraception and therapy.
    Type: Application
    Filed: December 4, 2015
    Publication date: November 23, 2017
    Inventors: Taina TJÄDER, Nina STENROOS, Christian WAMPRECHT, Wolfgang KAUFHOLD
  • Patent number: 9718917
    Abstract: The invention relates to a method for producing a thermoplastic polyurethane elastomer based on polyether carbonate polyols. The method comprises a first step, in which at least A) an organic diisocyanate and B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol are reacted to form an isocyanate-terminated prepolymer. In a second step, the prepolymer is reacted with C) one or more chain extenders having a molecular weight>=60 and <=490 g/mol and optionally D) a monofunctional chain stopper or E) an organic diisocyanate, wherein optionally at least F) one catalyst is used in the first and/or second step.; The molar ratio of the sum of the isocyanate groups from A) and, if applicable, E) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=12:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: August 1, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Christian Wamprecht, Wolfgang Kaufhold, Christoph Gürtler
  • Publication number: 20170081463
    Abstract: The invention also relates to thermoplastic polyurethanes and to a method for the production and use thereof.
    Type: Application
    Filed: April 1, 2015
    Publication date: March 23, 2017
    Applicant: Covestro Deutschland AG
    Inventors: Christian WAMPRECHT, Christoph GÜRTLER
  • Patent number: 9593199
    Abstract: The invention relates to a method for producing a thermoplastic polyurethane elastomer, comprising the reaction of at least A) one organic diisocyanate containing two isocyanate groups with B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol, which has at least two isocyanate-reactive groups, and C) one or more chain extenders having a molecular weight >=60 and <=490 g/mol, which have two isocyanate-reactive groups, and optionally D) a monofunctional chain stopper, which has one isocyanate-reactive group, and/or E) a catalyst, wherein the molar ratio of the isocyanate groups from A) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=1.2:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: March 14, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Christian Wamprecht, Wolfgang Kaufhold, Christoph Gürtler
  • Patent number: 9458282
    Abstract: The invention relates to the use of polyurethane sealing compounds for the production of light-fast compact or foamed polyurethane bodies or polyurethane urea bodies which have excellent mechanical and optical properties and especially a very high thermostability.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: October 4, 2016
    Assignee: Covestro Deutchland AG
    Inventors: Dorota Greszta-Franz, Hans-Josef Laas, Jens Krause, Dieter Mager, Christian Wamprecht
  • Publication number: 20150284501
    Abstract: The invention relates to a method for producing a thermoplastic polyurethane elastomer based on polyether carbonate polyols. The method comprises a first step, in which at least A) an organic diisocyanate and B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol are reacted to form an isocyanate-terminated prepolymer. In a second step, the prepolymer is reacted with C) one or more chain extenders having a molecular weight>=60 and <=490 g/mol and optionally D) a monofunctional chain stopper or E) an organic diisocyanate, wherein optionally at least F) one catalyst is used in the first and/or second step.; The molar ratio of the sum of the isocyanate groups from A) and, if applicable, E) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=12:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances.
    Type: Application
    Filed: October 11, 2013
    Publication date: October 8, 2015
    Inventors: Christian Wamprecht, Wolfgang Kaufhold, Christoph Gürtler
  • Publication number: 20150232606
    Abstract: The invention relates to a method for producing a thermoplastic polyurethane elastomer, comprising the reaction of at least A) one organic diisocyanate containing two isocyanate groups with B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol, which has at least two isocyanate-reactive groups, and C) one or more chain extenders having a molecular weight >=60 and <=490 g/mol, which have two isocyanate-reactive groups, and optionally D) a monofunctional chain stopper, which has one isocyanate-reactive group, and/or E) a catalyst, wherein the molar ratio of the isocyanate groups from A) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=1.2:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances.
    Type: Application
    Filed: October 14, 2013
    Publication date: August 20, 2015
    Applicant: Bayer Material/Science AG
    Inventors: Christian Wamprecht, Wolfgang Kaufhold, Christoph Gürtler
  • Patent number: 9096717
    Abstract: The invention relates to a process for the preparation of polyol mixtures comprising polyether carbonate polyol and polyol containing urethane groups, characterized in that (i) in a first step one or more alkylene oxides and carbon dioxide are added on to one or more H-functional starter substances in the presence of at least one DMC catalyst (“copolymerization”), and (ii) in a second step at least one amino-functional substance is added to the crude mixture formed in step (i), and a process for the preparation of polyurethane from these mixtures.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: August 4, 2015
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Christian Wamprecht, Christoph Gürtler
  • Publication number: 20150166715
    Abstract: Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH2)n, R1 and R2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of ?400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.
    Type: Application
    Filed: March 2, 2015
    Publication date: June 18, 2015
    Inventors: Heike Heckroth, Hartmut Nefzger, Christian Wamprecht
  • Patent number: 9000089
    Abstract: Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH2)n, R1 and R2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of ?400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: April 7, 2015
    Assignee: Medical Adhesive Revolution GmbH
    Inventors: Heike Heckroth, Hartmut Nefzger, Christian Wamprecht
  • Publication number: 20140350206
    Abstract: The invention relates to a thermoplastic polyurethane that can be obtained by reacting at least the following components: an isocyanate having two isocyanate groups, a first poly(ethylene glycol)polyether diol of the structure (HO—(CH2-CH2-O)x-H) having two isocyanate-reactive groups and a number-average molecular weight Mn>=6000 and <=16000 g/mol, a second poly(ethylene glycol)polyether diol of the structure (HO—(CH2-CH2-O)x-H) having two isocyanate-reactive groups and a number-average molecular weight Mn that corresponds to up to 80% of the number-average molecular weight Mn of the first poly(ethylene glycol)polyether diol B1), a chain extender having two isocyanate-reactive groups and a number-average molecular weight Mn>=60 and <600 g/mol, optionally a catalyst, and optionally auxiliary agents and additives, wherein the equivalent ratio of isocyanate A); to poly(ethylene glycol)polyether diols B1) and B2) lies between 1.5:1.0 and 10.0:1.
    Type: Application
    Filed: September 17, 2012
    Publication date: November 27, 2014
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Sebastian Dörr, Henricus Peerlings, Christian Wamprecht, Hansson Dennis
  • Patent number: 8791200
    Abstract: The present invention relates to a polyurethaneurea solution having a polyurethaneurea having a structural unit of the formula (I) and terminated with at least one copolymer unit of the group consisting of a polyethylene oxide, a polypropylene oxide, and mixtures thereof.
    Type: Grant
    Filed: August 22, 2009
    Date of Patent: July 29, 2014
    Assignee: Bayer MaterialScience AG
    Inventors: Jürgen Köcher, Christian Wamprecht
  • Patent number: 8530600
    Abstract: This invention concerns thermoplastic polyurethane mouldings with improved surface resistance (resistance to writing and scratching) and very good technical processability as well as their use.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: September 10, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Faisal Shafiq, Christian Wamprecht, David Pucket