Patents by Inventor Adrianus Cornelis Poppelaars

Adrianus Cornelis Poppelaars 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 polymer particles
    Patent number: 6262193
    Abstract: Process for the preparation of polyvinylarene polymer particles by suspension polymerization, wherein (a) vinylarene monomers are suspended in an aqueous medium to yield a suspension; (b) the temperature of the suspension is adjusted to a temperature above 50° C., at which temperature an initiator is added; (c) subsequently, the reaction temperature is increased by 5 to 30° C. per hour until a temperature of at least 120° C. has been reached; and (d) the temperature is retained at a temperature of at least 120° C. until the polymerization is complete.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: July 17, 2001
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Adrianus Cornelis Poppelaars, Johannes Maria Zijderveld