Patents by Inventor Robrecht Leonardus Johannes van der Bruggen

Robrecht Leonardus Johannes van der Bruggen 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 the preparation of multifunctional polycarbodiimides which are used as crosslinking agents
    Patent number: 9546301
    Abstract: A process for the preparation of multifunctional polycarbodiimides, which are used as crosslinking agents, in which the polycarbodiimide is prepared by reacting mono- and polyisocyanates in the presence of a mono- or polyisocyanate that contains one or multiple additional reactive functional groups and in the presence of a carbodiimide catalyst, and thereafter terminating or chain extending the polycarbodiimide chain. Between 0 and 10% of an organic solvent and/or between 0 and 30% of a plasticizer and/or between 0 and 30% of a surface active component is added to the product during, before or after the polycarbodiimide forming reaction and/or the capping reaction and/or the chain extending reaction. Further, the invention relates to a coating mixture in which the polycarbodiimide is used as crosslinking agent and to the cured material obtained with the coating mixture.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: January 17, 2017
    Assignee: STAHL INTERNATIONAL B.V.
    Inventors: Andries Johannes Derksen, Robrecht Leonardus Johannes van der Bruggen