Patents Assigned to NSG Techno-Research Co., Ltd.
  • Patent number: 6379776
    Abstract: The present invention relates to An anti-fogging and stain-prevented glass article having an alkali shut-off film and a photocatalytic film in the order laminated on the surface of glass substrate, in which dents and projections having an arithmetical mean roughness (Ra) from 1.5 to 80 nm and mean interval (Sm) of dents and projections from 4 to 300 nm are formed thereon, and to An anti-fogging and stain-prevented glass article having an alkali shut-off film, a photocatalytic film, and a silicon oxide monocomponent equivalent layer or a layer of organosilane including at least one kind of functional group selected from polyalkyleneoxide group, alkyl group, alkenyl group and aryl group in its molecules or its hydrolyzed substance, laminated in the order on the surface of a glass article. The abovementioned anti-fogging and stain-prevented glass article can be used for window glasses of automobiles and buildings, and glasses, etc.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: April 30, 2002
    Assignees: Nippon Sheet Glass Co., Ltd., NSG Techno-Research Co., Ltd.
    Inventors: Hiroaki Tada, Koji Shimoda, Akihiko Hattori, Kazuhiro Doushita, Takashi Sunada
  • Patent number: 6194346
    Abstract: Fluorine contained within a photocatalyst layer containing titanium oxide and other metallic oxide semiconductors increases the metallic oxide's photocatalytic activity. The described photocatalyst may be in the form of either film, flake, particulate, or fiber. In addition, it can be used for coating the surface of a base material of various forms, such as sheet, film, flake, particulate, bar, or fiber. When using a base material that has an alkaline-containing glass composition, establishing a fluorine-containing layer, such as a layer of fluorine-containing silicon dioxide and other metallic oxide, between the photocatalyst film and the base material can prevent the deterioration of photocatalytic activity of the photocatalyst layer. The fluorine-containing layer functions as an alkaline barrier that controls the diffusion and migration of alkali metallic ions in the glass fibers, such as Na ions, into the photocatalyst layer.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: February 27, 2001
    Assignees: Nippon Sheet Glass Co., Ltd., NSG Techno-Research Co., Ltd.
    Inventors: Hiroaki Tada, Koji Shimoda, Toshiya Ito, Akihiko Hattori
  • Patent number: 6074981
    Abstract: Fluorine contained within a photocatalyst layer containing titanium oxide and other metallic oxide semiconductors increases the metallic oxide's photocatalytic activity. The described photocatalyst may be in the form of either film, flake, particulate, or fiber. In addition, it can be used for coating the surface of a base material of various forms, such as sheet, film, flake, particulate, bar, or fiber. When using a base material that has an alkaline-containing glass composition, establishing a fluorine-containing layer, such as a layer of fluorine-containing silicon dioxide and other metallic oxide, between the photocatalyst film and the base material can prevent the deterioration of photocatalytic activity of the photocatalyst layer. The fluorine-containing layer functions as an alkaline barrier that controls the diffusion and migration of alkali metallic ions in the glass fibers, such as Na ions, into the photocatalyst layer.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: June 13, 2000
    Assignees: Nippon Sheet Glass Co., Ltd., NSG Techno-Research Co., Ltd.
    Inventors: Hiroaki Tada, Koji Shimoda, Toshiya Ito, Akihiko Hattori