Patents Assigned to Nippon Crucible Company, Ltd.
  • Refractory composition for flow casting
    Patent number: 4377413
    Abstract: A refractory composition for flow casting consists essentially of 100 parts by weight of refractory material, 0.1 to 2 parts by weight of sparingly water-soluble aluminum tripolyphosphate, 0.2 to 3 parts by weight of alkali metal silicate, 0.5 to 5 parts by weight of clay, up to 2/5 part by weight of organic binder per amount of clay, and 0.2 to 4 parts by weight of at least one hardening promoting reagent selected from the group consisting of calcium silicate and calcium aluminate.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: March 22, 1983
    Assignees: Nippon Steel Corporation, Nippon Crucible Company, Ltd.
    Inventors: Mitsuo Nomura, Shigeru Amano, Sho Okubo, Takuo Hosaka, Kunihiko Shiraishi, Ryuzi Adachi