Patents Assigned to Mitsui Kinzoku Mitsui Maining & Smelting Co. Ltd.
  • Patent number: 5997775
    Abstract: The electrically conductive, barium sulfate-containing composition consists of BaSO.sub.4 particles having a surface area of from 0.1 to 150 m.sup.2 /g. The BaSO.sub.4 particles each are provided with a SnO.sub.2 coating having a thickness of 2 to 80 nm and containing from 1 to 15% by weight of the Sb.sub.2 O.sub.3. The electrically conductive, barium sulfate-containing composition is made by a method including the steps of adding a first acidic solution containing 1 to 95% by weight SnCl.sub.4 and a basic solution to an aqueous dispersion from 50 to 800 g/l of BaSO.sub.4 to make a basic mixture having a pH from 9 to 15; then adding an acid to the basic mixture to form an acidic mixture having a pH from 4 to 1; then adding a second acid solution containing 0.5 to 60% by weight of SbCl.sub.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: December 7, 1999
    Assignee: Mitsui Kinzoku Mitsui Maining & Smelting Co. Ltd.
    Inventors: Takao Hayashi, Norihiro Sato, Manabu Hosoi, Nobuyoshi Kasahara, Clemens Aderhold, Wolf-Dieter Griebler, Jorg Hocken, Uwe Rosin, Gunther Rudolph