Patents Assigned to Nikko Chemical Institute Inc.
  • Process for coloring concrete
    Patent number: 5534214
    Abstract: A concrete coloring material and a process for coloring concrete by means of such a concrete coloring material capable of permitting concrete to exhibit natural color or aesthetic properties while preventing concrete from being substantially discolored. Polyethylene oxide is used as a water-soluble adhesive or gIue. The oxide is mixed with a composition such as dye, pigment, a mixture thereof or the like, to thereby permit the composition to penetrate into the concrete.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: July 9, 1996
    Assignees: Toyoko Giken Co., Ltd., Nikko Chemical Institute Inc.
    Inventors: Nobuyuki Sakamoto, Takehiko Kobayashi, Takashi Horiguchi
  • Concrete coloring material and process for coloring concrete
    Patent number: 5476722
    Abstract: A concrete coloring material and a process for coloring concrete by means of such a concrete coloring material capable of permitting concrete to exhibit natural color or aesthetic properties while preventing concrete from being substantially discolored. Polyethylene oxide is used as a water-soluble adhesive or glue. The oxide is mixed with a composition such as dye, pigment, a mixture thereof or the like, to thereby permit the composition to penetrate into the concrete.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: December 19, 1995
    Assignees: Toyoko Giken Co., Ltd., Nikko Chemical Institute Inc.
    Inventors: Nobuyuki Sakamoto, Takehiko Kobayashi, Takashi Horiguchi
  • Modified silicone oil-in-water emulsion defoaming agent and defoaming method using it
    Patent number: 5431853
    Abstract: An emulsion type defoaming agent composition formed by emulsifying 5 to 35 weight parts of an organic fluid, 0.5 to 5 weight parts of a silicone oil, 0.5 to 5 weight parts of a hydrophobic silica and 1 to 40 weight parts of a modified silicone oil into water in the presence of an emulsifier is useful as a defoaming agent for aqueous systems, particularly for strongly alkaline aqueous systems.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: July 11, 1995
    Assignees: Nikko Chemical Institute Inc., Nicca Chemical Co., Ltd.
    Inventors: Yasutaka Tsuda, Mitsuru Komatsu