Patents Assigned to Werzalit Aktiengesellschaft & Co.
  • Method of making a pressible mixture of lignocellulose-containing fibers and a thermoplastic material having stronger bonding between the fibers and the thermoplastic material
    Patent number: 5155147
    Abstract: The method of making a pressible mixture of lignocellulose-containing fibers and a thermoplastic material includes mixing the fibers with 2 to 8% by weight of a duroplastic, preferably an aminoplast or a phenoplast, 0.5 to 2% by weight of a hydrophobic agent for example, paraffin, and 2 to 10% by weight of an aqueous dispersion of methacrylate and/or polyethylene to form a pretreated fiber mixture and then subsequently mixing 100 parts by weight of the pretreated fiber mixture with from 120 to 150 parts by weight of a thermoplastic powder.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: October 13, 1992
    Assignee: Werzalit Aktiengesellschaft & Co.
    Inventors: Martin Dietz, Bernd Asseier