Patents by Inventor Silke Biedasek

Silke Biedasek 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: 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: 20200047397
    Abstract: The present invention relates to a process for producing a polymer film (P) comprising a polyamide composition (PC) by extruding the polyamide composition (PC) through an annular die and then stretching the tube thus obtained by blowing in air. The present invention further relates to the polymer film (P) obtainable by the process of the invention and to a process for packaging foodstuffs with the polymer film (P).
    Type: Application
    Filed: October 24, 2017
    Publication date: February 13, 2020
    Applicant: BASF SE
    Inventors: Rolf MINKWITZ, Silke BIEDASEK, Rony KNIERIM, Frank HERBOTH
  • Patent number: 9914805
    Abstract: The invention relates to a device for synthesizing a polymer accompanied by separating a gaseous substance. Said device comprises: a reactor chamber (1) having a substantially circular cylinder-shaped upper section (11), which is delimited by two circular surfaces (111, 112) and a circumferential surface (113) and has a longitudinal cylinder axis, and a lower section (12), the upper section (11) and the lower section (12) being connected to one another via the first circular surface (111); an inlet opening (2); a first outlet opening (3), which is arranged in a wall of the lower section (12); a second outlet opening (4), which is arranged in the second circular surface (112) or in the circumferential surface (113) between the inlet opening (2) and the second circular surface (112); and a removal device (51), which is arranged so as to be movable along the longitudinal cylinder axis at least between the second circular surface (112) and the inlet opening (2), and contacts the circumferential surface (113).
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 13, 2018
    Assignee: BASF SE
    Inventors: Ning Zhu, Achim Stammer, Joachim Clauss, Uwe Witt, Gad Kory, Silke Biedasek
  • Patent number: 9834885
    Abstract: The present invention relates to a process for the production of a fiber-reinforced composite material with a polyamide matrix.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: December 5, 2017
    Assignee: BASF SE
    Inventors: Philippe Desbois, Silke Biedasek
  • 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
  • Publication number: 20170081472
    Abstract: The present invention provides a process for producing polyamides, which comprises a) providing a monomer composition comprising at least one lactam or at least one aminocarbonitrile and/or oligomers of these monomers, b) reacting the monomer composition provided in step a) in a hydrolytic polymerization at elevated temperature in the presence of water to obtain a reaction product comprising polyamide, water, unconverted monomers and oligomers, c) the reaction product obtained in step b) being fed into at least one kneader (3) and subjected to a postpolymerization, d) optionally forming the reaction product obtained in step c) to obtain polyamide particles, e) optionally treating the reaction product obtained in step c) or the polyamide particles obtained in step d) with at least one extractant.
    Type: Application
    Filed: May 13, 2015
    Publication date: March 23, 2017
    Applicant: BASF SE
    Inventors: Ning ZHU, Ruediger HAEFFNER, Achim STAMMER, Cesar ORTIZ, Silke BIEDASEK, Faissal-Ali EL-TOUFAILI
  • 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: 20160130398
    Abstract: The invention relates to a device for synthesizing a polymer accompanied by separating a gaseous substance. Said device comprises: a reactor chamber (1) having a substantially circular cylinder-shaped upper section (11), which is delimited by two circular surfaces (111, 112) and a circumferential surface (113) and has a longitudinal cylinder axis, and a lower section (12), the upper section (11) and the lower section (12) being connected to one another via the first circular surface (111); an inlet opening (2); a first outlet opening (3), which is arranged in a wall of the lower section (12); a second outlet opening (4), which is arranged in the second circular surface (112) or in the circumferential surface (113) between the inlet opening (2) and the second circular surface (112); and a removal device (51), which is arranged so as to be movable along the longitudinal cylinder axis at least between the second circular surface (112) and the inlet opening (2), and contacts the circumferential surface (113).
    Type: Application
    Filed: June 11, 2014
    Publication date: May 12, 2016
    Inventors: Ning Zhu, Achim Stammer, Joachim Clauss, Uwe Witt, Gad Kory, Silke Biedasek
  • Publication number: 20160009869
    Abstract: The present invention relates to a process for preparing polyamides, comprising a hydrolytic polymerization, a postpolymerization and an extraction.
    Type: Application
    Filed: March 6, 2014
    Publication date: January 14, 2016
    Applicant: BASF SE
    Inventors: Silke BIEDASEK, Achim STAMMER, Gad KORY, William E. GRANT
  • Patent number: 9139692
    Abstract: The present invention relates to a novel process for the anionic polymerization of lactam monomers.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: September 22, 2015
    Assignee: BASF SE
    Inventors: Silke Biedasek, Philippe Desbois, Mohammed Abboud, Andreas Wollny
  • Publication number: 20140256905
    Abstract: The present invention relates to a process for preparing polyamides by hydrolytic polymerization, in which the polyimide is treated in a devolatilizing apparatus after the hydrolytic polymerization.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Applicant: BASF SE
    Inventors: Silke Biedasek, Achim Stammer
  • Publication number: 20140256887
    Abstract: The present invention relates to a process for preparing polyamides, comprising a hydrolytic polymerization and at least two extraction steps which are not in immediate succession.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Applicant: BASF SE
    Inventors: Gad Kory, Silke Biedasek, Faissal-Ali El-Toufaili, Achim Stammer, Reinhard Lang, Dirk Meckelnburg
  • Publication number: 20140154937
    Abstract: The present invention relates to a process for the production of a fiber-reinforced composite material with a polyamide matrix.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: BASF SE
    Inventors: Philippe Desbois, Silke Biedasek
  • Publication number: 20140142274
    Abstract: The present invention relates to solid particles which comprise at least one lactam, and also at least one activator, and at least one catalyst, to a process for the production of these, and also to the use of these for the production of polyamide, and to a process for the production of polyamide.
    Type: Application
    Filed: July 2, 2012
    Publication date: May 22, 2014
    Applicant: BASF SE
    Inventors: Philippe Desbois, Silke Biedasek, Andreas Wollny
  • Publication number: 20130261282
    Abstract: The present invention relates to a process for producing polyamide moldings by subjecting a lactam-containing polymerizable composition to a rotomolding process.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 3, 2013
    Applicant: BASF SE
    Inventors: Silke Biedasek, Philippe Desbois
  • Publication number: 20120141791
    Abstract: The present invention relates to a novel process for the anionic polymerization of lactam monomers.
    Type: Application
    Filed: December 1, 2011
    Publication date: June 7, 2012
    Applicant: BASF SE
    Inventors: Silke Biedasek, Philippe Desbois, Mohammed Abboud, Andreas Wollny
  • Publication number: 20090131549
    Abstract: A process for preparing polyvinylpyrrolidones by free-radically initiated polymerization in the presence of an initiator found, which comprises performing the polymerization as a spray or droplet polymerization.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 21, 2009
    Applicant: BASF SE
    Inventors: Dennis Losch, Ralf Widmaier, Volker Seidl, Hans-Ulrich Moritz, Karim Asif, Silke Biedasek