Patents by Inventor Eric Wilhelmus Johannes Frederik Neijman

Eric Wilhelmus Johannes Frederik Neijman 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).

  • Polymer particles
    Patent number: 6528570
    Abstract: Polymer particles containing a polymer of a vinylarene monomer, a porous silicate compound and at least 1.5% by weight of water, based on the weight of vinylarene, water and porous silicate compound, wherein the porous silicate compound is selected from alumino silicates and amorphous silica particles, and a process for the preparation of such polymer particles.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: March 4, 2003
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Michel Florentine Jozef Berghmans, Carolus Matthias Anna Maria Mesters, Alphonsus Catharina Gerardus Metsaars, Eric Wilhelmus Johannes Frederik Neijman, Ján Pallay
  • Process for the preparation of polymer particles
    Patent number: 6242540
    Abstract: Particles of a copolymer of a vinyl arene and a copolymerizable compound containing a polar moiety and a vinyl moiety containing water may be prepared by forming a mixture of monomers and small amounts of water and polymerizing under agitation to 20 to 70% conversion and then suspending the mass in water and finishing the polymerization. The resulting polymer beads contain finely dispersed water which is useful as an environmentally acceptable blowing agent.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: June 5, 2001
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Jeroen Joost Crevecoeur, Eric Wilhelmus Johannes Frederik Neijman, Laurentius Nicolaas Ida Hubertus Nelissen, Johannes Maria Zijderveld
  • Process for the preparation of polymer particles
    Patent number: 6160027
    Abstract: It is desirable to reduce the amount of volatile organic blowing agent in expandable polystyrene. This may be accomplished by partially polymerizing a mass of styrene and incorporating therein water together with an emulsifier. The partially polymerized mass is then polymerized to a high conversion using conventional suspension techniques. The polymer beads containing water which acts as a blowing agent are recovered.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: December 12, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Jeroen Joost Crevecoeur, Eric Wilhelmus Johannes Frederik Neijman, Laurentius Nicolaas Ida Hubertus Nelissen, Johannes Maria Zijderveld
  • Process for the preparation of polymer particles
    Patent number: 6127439
    Abstract: The present invention provides a process for preparing an expandable polymer of a vinyl aromatic monomer and a polar water adsorbing monomer. The monomers are partially polymerized and then suspended in water so that the resulting beads contain from 3 to 40 weight % water which act as the sole or a predominant blowing agent.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: October 3, 2000
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Hugo Angela Albert Berghmans, Igor Chorvath, Peter Kelemen, Eric Wilhelmus Johannes Frederik Neijman, Johannes Maria Zijderveld