Patents Assigned to Bowic B.V.
  • Patent number: 5266253
    Abstract: The present invention relates to a method of manufacturing molded polymer articles comprised of casting resins and having color-differentiated surface regions, wherein prior to the charging of the casting resin, a surface region of the molding implement is coated with a hardenable coating of a colorant-containing composition, producing color-differentiation in the surface of the molded articles. The designated surface regions of the molding implement are coated with at least two layers, whereby, according to the present method, the first coating step applies a filler-containing coating dispersion (L-1) without added colorant, and the second coating step applies a colorant-containing coating (L-2) without filler. Thereafter, the coating layers are dried, the casting resin is charged to the molding implement, the resin is polymerized by heating, and the molded articles removed from the mold.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: November 30, 1993
    Assignees: Roehm GmbH Chemische Fabrik, Bowic B.V.
    Inventors: Okko K. Dijkhuizen, Manfred Krieg, Guenther Ittmann