Patents by Inventor Frank Bruynseels

Frank Bruynseels 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).

  • Ultra-high purity polycarbonates having good inherent color and thermal resistance and a device and a method for producing the same
    Patent number: 10435507
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 8, 2019
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas Koenig, Joerg Kirchhoff, Michael Bierdel, Klemens Kohlgrueber, Johann Rechner, Ing. Johan Vaes, Johan Vanden Eynde, Frank Bruynseels, Bert Ruytinx
  • Preparation of highly heat-resistant (co)polycarbonates by the transesterification method
    Patent number: 10370491
    Abstract: The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: August 6, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Ivan Sluijs, Jan Heijl, Erik Sluyts, Frank Bruynseels
  • ULTRA-HIGH PURITY POLYCARBONATES HAVING GOOD INHERENT COLOR AND THERMAL RESISTANCE AND A DEVICE AND A METHOD FOR PRODUCING THE SAME
    Publication number: 20180105644
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Application
    Filed: October 20, 2017
    Publication date: April 19, 2018
    Applicant: Covestro Deutschland AG
    Inventors: Thomas Koenig, Joerg Kirchhoff, Michael Bierdel, Klemens Kohlgrueber, Johann Rechner, Ing. Johan Vaes, Johan Vanden Eynde, Frank Bruynseels, Bert Ruytinx
  • Preparation of Highly Heat-Resistant (Co)Polycarbonates by the Transesterification Method
    Publication number: 20170369642
    Abstract: The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.
    Type: Application
    Filed: January 20, 2016
    Publication date: December 28, 2017
    Inventors: Ivan Sluijs, Jan Heijl, Erik Sluyts, Frank Bruynseels
  • Ultra-high purity polycarbonates having good inherent color and thermal resistance and a device and a method for producing the same
    Patent number: 9828464
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: November 28, 2017
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas König, Jörg Kirchhoff, Michael Bierdel, Klemens Kohlgrüber, Johann Rechner, Ing. Johan Vaes, Johan Vanden Eynde, Frank Bruynseels, Bert Ruytinx
  • Process and apparatus for the preparation of polycarbonate
    Patent number: 8394912
    Abstract: The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discolored and is free of insoluble constituents.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: March 12, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Frank Doebert, Andreas Stremmel, Christoph Biedron, Stephan Laue, Johann Rechner, Torsten Hagen, Frank Bruynseels, Frank Quaeyhaegens, Johan Decloedt, Paul Van Dorst, Uwe Arndt, Johan Vanden Eynde, Ursula Tracht, Thomas König, Ulrich Liesenfelder
  • ULTRA-HIGH PURITY POLYCARBONATES HAVING GOOD INHERENT COLOR AND THERMAL RESISTANCE AND A DEVICE AND A METHOD FOR PRODUCING THE SAME
    Publication number: 20120157653
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Application
    Filed: May 26, 2010
    Publication date: June 21, 2012
    Applicant: BAYER MATERIAL SECIENCE AG
    Inventors: Thomas König, Jörg Kirchhoff, Michael Bierdel, Klemens Kohlgrüber, Johann Rechner, Ing Johan Vaes, Johan Vander Eynde, Frank Bruynseels, Bert Ruytinx
  • PROCESS AND APPARATUS FOR THE PREPARATION OF POLYCARBONATE
    Publication number: 20110184144
    Abstract: The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discoloured and is free of insoluble constituents.
    Type: Application
    Filed: December 20, 2010
    Publication date: July 28, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Frank Doebert, Andreas Stremmel, Christoph Biedron, Stephan Laue, Johann Rechner, Torsten Hagen, Frank Bruynseels, Frank Quaeyhaegens, Johan Decloedt, Paul Van Dorst, Uwe Arndt, Johan Vanden Eynde, Ursula Tracht, Thomas König, Ulrich Liesenfelder
  • Working up of polymer synthesis solutions
    Patent number: 6716933
    Abstract: The present invention relates to a process for working up solutions of polymers in organic solvents contaminated by alkaline constituents, using homogeneously soluble acids, especially by the introduction of an acid gas, and subsequent washing, and to the polymers so obtainable, which are distinguished by the fact that, on treatment with moist heat (sterilisation), only few defects caused by decomposition are formed, to the use thereof in the production of extrudates and molded specimen, and to the extrudates and molded specimen produced from those polymers themselves.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: April 6, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Alewelt, Wolfgang Ebert, Thomas Fritz, Dirk Jahn, Stefan Westernacher, Frank Bruynseels, Johann Rechner
  • Working up of polymer sysnthesis solutions
    Publication number: 20030023030
    Abstract: The present invention relates to a process for working up solutions of polymers in organic solvents contaminated by alkaline constituents, using homogeneously soluble acids, especially by the introduction of an acid gas, and subsequent washing, and to the polymers so obtainable, which are distinguished by the fact that, on treatment with moist heat (sterilisation), only few defects caused by decomposition are formed, to the use thereof in the production of extrudates and molded specimen, and to the extrudates and molded specimen produced from those polymers themselves
    Type: Application
    Filed: July 16, 2002
    Publication date: January 30, 2003
    Inventors: Wolfgang Alewelt, Wolfgang Ebert, Thomas Fritz, Dirk Jahn, Stefan Westernacher, Frank Bruynseels, Johann Rechner