Patents by Inventor Fredericus Slijkerman

Fredericus Slijkerman 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).

  • Styrenic polymers having reduced trimer content
    Patent number: 11584807
    Abstract: Disclosed are styrenic polymers made by a mass or solution process, where the amount of trimer consisting of styrene and/or acrylonitrile is less than about 0.50 weight percent. Also disclosed is a method of minimizing the amount of trimer consisting of styrene and/or acrylonitrile in styrenic polymers made by a mass or solution process. The method includes the steps of lowering the temperature of the polymerization reaction mixture and including more than one initiator in the polymerization reaction mixture.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: February 21, 2023
    Assignee: TRINSEO EUROPE GMBH
    Inventors: Gilbert Bouquet, Fredericus Slijkerman
  • STYRENIC POLYMERS HAVING REDUCED TRIMER CONTENT
    Publication number: 20220213237
    Abstract: Disclosed are styrenic polymers made by a mass or solution process, where the amount of trimer consisting of styrene and/or acrylonitrile is less than about 0.50 weight percent. Also disclosed is a method of minimizing the amount of trimer consisting of styrene and/or acrylonitrile in styrenic polymers made by a mass or solution process. The method includes the steps of lowering the temperature of the polymerization reaction mixture and including more than one initiator in the polymerization reaction mixture.
    Type: Application
    Filed: June 10, 2020
    Publication date: July 7, 2022
    Applicants: TRINSEO EUROPE GMBH, TRINSEO EUROPE GMBH
    Inventors: Gilbert Bouquet, Fredericus Slijkerman
  • Impact modified monovinylidene aromatic polymer having low rubber crosslinking
    Patent number: 9447219
    Abstract: The ductility/stiffness balance of a rubber-modified monovinylidene aromatic polymer, e.g., HIPS, is increased without increasing the rubber content of the polymer and/or changing the size of the average rubber particle by a process comprising the step of crosslinking the rubber such that the rubber-modified polymer has an optical crosslink index (OCLI) of <0.5 and an injection molded/compression molded (IM/CM) modulus ratio ?1.3.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: September 20, 2016
    Assignee: Styron Europe GMBH
    Inventors: Gilbert C. E. Bouquet, Fredericus Slijkerman
  • IMPACT MODIFIED MONOVINYLIDENE AROMATIC POLYMER HAVING LOW RUBBER CROSSLINKING
    Publication number: 20120202949
    Abstract: The ductility/stiffness balance of a rubber-modified monovinylidene aromatic polymer, e.g., HIPS, is increased without increasing the rubber content of the polymer and/or changing the size of the average rubber particle by a process comprising the step of crosslinking the rubber such that the rubber-modified polymer has an optical crosslink index (OCLI) of <0.5 and an injection molded/compression molded (IM/CM) modulus ratio ?1.3.
    Type: Application
    Filed: October 6, 2010
    Publication date: August 9, 2012
    Applicant: Styron Europe GmbH
    Inventors: Gilbert C.E. Bouquet, Fredericus Slijkerman