Patents by Inventor Ing Johan Vaes

Ing Johan Vaes 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
  • 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
  • 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
  • Device and method for degassing solvent-containing polycarbonate solutions
    Patent number: 8497345
    Abstract: The invention relates to an apparatus and a process for devolatilizing solvent-containing polycarbonate solutions. By employing the inventive apparatus, polycarbonates with low residual values of volatile constituents are produced from solvent-containing polymer melts, which improved optical properties, especially yellowness index, with the aid of an apparatus combination of a flash devolatilizer and a vented extruder.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: July 30, 2013
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Thomas König, Klemens Kohlgrüber, Johan Vanden Eynde, Ing Johan Vaes, Stefaan De Vos
  • 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