Patents by Inventor Walter H. N. Nijhuis

Walter H. N. Nijhuis 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).

  • Process for molecular weight regulation in (co)polymers
    Patent number: 5612430
    Abstract: A polymerization method carried out in the presence of unsaturated organic peroxide chain transfer agents is disclosed. Also disclosed are (co)polymers and oligomers made by this process and articles of manufacture comprising one or more (co)polymers or oligomers made by this process. Furthermore, the use of these unsaturated organic peroxides as chain transfer agents is disclosed. The present process reduces the severe retardation of polymerization observed for unsaturated organic peroxide chain transfer agents of the prior art and, in some cases, even improves the monomer conversion in comparison to the control.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: March 18, 1997
    Assignee: Akzo Nobel nv
    Inventors: Walter H. N. Nijhuis, Auke G. Talma, Luc L. T. Vertommen, Bernard J. Maillard