Patents by Inventor Stefan Schwiegk

Stefan Schwiegk 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: 20220049096
    Abstract: A polyarylene ether sulfone contains endgroups of formula (I), A molding composition contains the polyarylene ether sulfone; and a fiber, film, or shaped article can be produced using the molding composition.
    Type: Application
    Filed: October 28, 2021
    Publication date: February 17, 2022
    Applicant: BASF SE
    Inventors: Martin WEBER, Helmut Reichelt, Stefan Schwiegk, Gad Kory, Christian Maletzko
  • Patent number: 11193020
    Abstract: A polyarylene ether sulfone comprising endgroups of formula (I), a process for its manufacture, a molding composition comprising the polyarylene ether sulfone, use of the molding composition and fiber, film or shaped article produced using the molding composition.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: December 7, 2021
    Assignee: BASF SE
    Inventors: Martin Weber, Helmut Reichelt, Stefan Schwiegk, Gad Kory, Christian Maletzko
  • Publication number: 20210171711
    Abstract: The present invention relates to semi-aromatic copolyamides having a high glass transition temperature and a high degree of crystallinity, to a polyamide molding compound containing said semi-aromatic copolyimide and to the use of the semi-aromatic copolyamides and of the polyamide molding compounds.
    Type: Application
    Filed: February 23, 2021
    Publication date: June 10, 2021
    Inventors: Florian Richter, Christian Schmidt, Joachim Clauss, Stefan Schwiegk, Axel Wilms, Gad Kory
  • Patent number: 10676569
    Abstract: The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 9, 2020
    Assignee: BASF SE
    Inventors: Joachim Clauss, Stefan Schwiegk, Gad Kory, Christian Schmidt, Axel Wilms, Florian Richter, Ning Zhu, Silke Biedasek, Isa Alexandra Queiroz Da Fonseca, Heinrich Sack, Arnold Schneller, Achim Stammer, Volker Rauschenberger
  • Publication number: 20200010680
    Abstract: A polyarylene ether sulfone comprising endgroups of formula (I), a process for its manufacture, a molding composition comprising the polyarylene ether sulfone, use of the molding composition and fiber, film or shaped article produced using the molding composition.
    Type: Application
    Filed: January 18, 2018
    Publication date: January 9, 2020
    Applicant: BASF SE
    Inventors: Martin WEBER, Helmut REICHELT, Stefan SCHWIEGK, Gad KORY, Christian MALETZKO
  • Patent number: 10351671
    Abstract: The present invention relates to a method for producing semi-aromatic copolyamides with a high diamine excess in the reaction batch.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: July 16, 2019
    Assignee: BASF SE
    Inventors: Axel Wilms, Christian Schmidt, Florian Richter, Joachim Clauss, Gad Kory, Stefan Schwiegk, Arnold Schneller
  • Patent number: 9994678
    Abstract: The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 12, 2018
    Assignee: BASF SE
    Inventors: Christian Schmidt, Joachim Clauss, Axel Wilms, Volker Rauschenberger, Gad Kory, Stefan Schwiegk, Arnold Schneller, Achim Stammer, Frank Niedermaier, Bernd Hackel
  • Patent number: 9708449
    Abstract: The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide oligomer, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and elevated pressure and the oligomerization output is preferably subjected to an expansion.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: July 18, 2017
    Assignee: BASF SE
    Inventors: Gad Kory, Joachim Clauss, Axel Wilms, Stefan Schwiegk, Christian Schmidt, Silke Biedasek, Heinrich Sack, Florian Richter, Ning Zhu
  • Patent number: 9701790
    Abstract: The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide, in which a polyamide prepolymer is subjected to a solid state polymerization.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: July 11, 2017
    Assignee: BASF SE
    Inventors: Christian Schmidt, Florian Richter, Joachim Clauss, Axel Wilms, Gad Kory, Arnold Schneller, Achim Stammer, Volker Rauschenberger, Stefan Schwiegk
  • Publication number: 20160340509
    Abstract: The present invention relates to the use of polyolefin copolymers A) for reducing color changes during the heating of polymer compositions which contain at least one thermoplastic polyamide B).
    Type: Application
    Filed: January 26, 2015
    Publication date: November 24, 2016
    Applicant: BASF SE
    Inventors: Christian Schmidt, Florian Richter, Joachim Clauss, Andreas Wollny, Philippe Desbois, Faissal-Ali El-Toufaili, Achim Stammer, Stefan Schwiegk
  • Publication number: 20160152770
    Abstract: The present invention relates to semi-aromatic copolyamides having a high glass transition temperature and a high degree of crystallinity, to a polyamide molding compound containing said semi-aromatic copolyamide and to the use of the semi-aromatic copolyamides and of the polyamide molding compounds.
    Type: Application
    Filed: June 11, 2014
    Publication date: June 2, 2016
    Inventors: Florian Richter, Christian Schmidt, Joachim Clauss, Stefan Schwiegk, Axel Wilms, Gad Kory
  • Publication number: 20160145390
    Abstract: The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 26, 2016
    Inventors: Christian Schmidt, Joachim Clauss, Axel Wilms, Volker Rauschenberger, Gad Kory, Stefan Schwiegk, Arnold Schneller, Achim Stammer, Frank Niedermaier, Bernd Hackel
  • Publication number: 20160145389
    Abstract: The present invention relates to a method for producing semi-aromatic copolyamides with a high diamine excess in the reaction batch.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 26, 2016
    Applicant: BASF SE
    Inventors: Axel Wilms, Christian Schmidt, Florian Richter, Joachim Clauss, Gad Kory, Stefan Schwiegk, Arnold Schneller
  • Publication number: 20160137782
    Abstract: The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide oligomer, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and elevated pressure and the oligomerization output is preferably subjected to an expansion.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 19, 2016
    Inventors: Gad Kory, Joachim Clauss, Axel Wilms, Stefan Schwiegk, Christian Schmidt, Silke Biedasek, Heinrich Sack, Florian Richter, Ning Zhu
  • Publication number: 20160137783
    Abstract: The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide, in which a polyamide prepolymer is subjected to a solid state polymerization.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 19, 2016
    Applicant: BASF SE
    Inventors: Christian Schmidt, Florian Richter, Joachim Clauss, Axel Wilms, Gad Kory, Arnold Schneller, Achim Stammer, Volker Rauschenberger, Stefan Schwiegk
  • Publication number: 20160130397
    Abstract: The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide.
    Type: Application
    Filed: June 11, 2014
    Publication date: May 12, 2016
    Inventors: Joachim Clauss, Stefan Schwiegk, Gad Kory, Christian Schmidt, Axel Wilms, Florian Richter, Ning Zhu, Sike Biedasek, Isa Alexandra Queiroz Da Fonseca, Heinrich Sack, Arnold Schneller, Achim Stammer, Volker Rauschenberger
  • Patent number: 9080259
    Abstract: The novel polyamide fibers with dyeable particles comprise 80% to 99.95% by weight of polyamide, 0.05% to 20% by weight of dyeable particles and 0% to 19.95% by weight of added substances, the % by weight summing to 100%.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: July 14, 2015
    Assignee: BASF SE
    Inventors: Stefan Schwiegk, Christof Kujat, Axel Wilms, Alexander Traut, Norbert Wagner
  • Patent number: 8999211
    Abstract: A process for producing porous structures from polyamide by dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium. Fibers are produced from the dissolved polyamide in a wet-spinning process by precipitation in protic solvents, in particular water, a C1-4-alkanol or mixtures thereof, and subsequent freeze-drying. Foils, films or coatings are produced by blade coating the dissolved polyamide onto a substrate surface, optionally spraying with protic solvent, in particular water, a C1-4-alcohol or mixtures thereof, dipping into a precipitation or coagulation bath, freeze-drying of the resulting foil, of the film or of the coated substrate. Molded parts are prepared by extracting the dissolved polyamide with protic solvents, preferably water, a C1-4-alcohol or mixtures thereof, wherein the dissolved polymer is transformed to a solid or wax-like state by cooling and extracted after subsequent molding.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: April 7, 2015
    Assignee: BASF SE
    Inventors: Stefan Schwiegk, Axel Wilms, Ronald Frans Maria Lange, Michael Siemer, Giovanni D'Andola, Volker Rauschenberger, Frank Hermanutz, Frank Gaehr, Julien Courtois, Dirk Gerhard
  • Publication number: 20120108710
    Abstract: The novel polyamide fibers with dyeable particles comprise 80% to 99.95% by weight of polyamide, 0.05% to 20% by weight of dyeable particles and 0% to 19.95% by weight of added substances, the % by weight summing to 100%.
    Type: Application
    Filed: June 24, 2010
    Publication date: May 3, 2012
    Applicant: BASF SE
    Inventors: Stefan Schwiegk, Christof Kujat, Axel Wilms, Alexander Traut, Norbert Wagner
  • Publication number: 20100310853
    Abstract: A process for producing porous structures from polyamide by dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium. Fibers are produced from the dissolved polyamide in a wet-spinning process by precipitation in protic solvents, in particular water, a C1-4-alkanol or mixtures thereof, and subsequent freeze-drying. Foils, films or coatings are produced by blade coating the dissolved polyamide onto a substrate surface, optionally spraying with protic solvent, in particular water, a C1-4-alcohol or mixtures thereof, dipping into a precipitation or coagulation bath, freeze-drying of the resulting foil, of the film or of the coated substrate. Molded parts are prepared by extracting the dissolved polyamide with protic solvents, preferably water, a C1-4-alcohol or mixtures thereof, wherein the dissolved polymer is transformed to a solid or wax-like state by cooling and extracted after subsequent moulding.
    Type: Application
    Filed: February 11, 2009
    Publication date: December 9, 2010
    Inventors: Stefan Schwiegk, Axel Wilms, Ronald Frans Maria Lange, Michael Siemer, Giovanni D'Andola, Volker Rauschenberger, Frank Hermanutz, Frank Gaehr