Patents by Inventor Junpei Karoji

Junpei Karoji has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Coated steel sheet comprising a composite coat containing compounded resin particles
    Patent number: 8241742
    Abstract: It is an object of the present invention to provide a coated steel sheet, properties of which such as tape peeling resistance, solvent resistance, alkali resistance and abrasion resistance are improved. A coated steel sheet coated with a composite coat, wherein said composite coat comprises a compounded resin (A) in which polyurethane resin particles (A-1) and ethylene-unsaturated carboxylic acid copolymerization resin particles (A-2), respectively having an average particle diameter of 20 to 100 nm and a silanol group and/or an alkoxysilyl, group, are contained in a mass ratio of 20:80 to 90:10 and silicon oxide particles (A-3) having an average particle diameter of 5 to 20 nm and an organic titanium compound (A-4) are compounded, polyolefin wax particles (B) having an average particle diameter of 0.5 to 4 ?m and a softening point of 100 to 140° C., and silicon oxide particles (C) having an average particle diameter of 70 to 200 nm, and wherein an amount of a coat of said composite coat is 0.5 to 3 g/cm2.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: August 14, 2012
    Assignees: Nippon Steel Corporation, Nippon Paint Co., Ltd.
    Inventors: Motohiro Sasaki, Junpei Karoji, Koichi Saito, Atsushi Morishita, Akira Takahashi, Hiroshi Kanai, Masahiro Fuda
  • COATED STEEL SHEET
    Publication number: 20100233469
    Abstract: It is an object of the present invention to provide a coated steel sheet, properties of which such as tape peeling resistance, solvent resistance, alkali resistance and abrasion resistance are improved. A coated steel sheet coated with a composite coat, wherein said composite coat comprises a compounded resin (A) in which polyurethane resin particles (A-1) and ethylene-unsaturated carboxylic acid copolymerization resin particles (A-2), respectively having an average particle diameter of 20 to 100 nm and a silanol group and/or an alkoxysilyl, group, are contained in a mass ratio of 20:80 to 90:10 and silicon oxide particles (A-3) having an average particle diameter of 5 to 20 nm and an organic titanium compound (A-4) are compounded, polyolefin wax particles (B) having an average particle diameter of 0.5 to 4 ?m and a softening point of 100 to 140° C., and silicon oxide particles (C) having an average particle diameter of 70 to 200 nm, and wherein an amount of a coat of said composite coat is 0.5 to 3 g/cm2.
    Type: Application
    Filed: June 15, 2006
    Publication date: September 16, 2010
    Applicants: NIPPON STEEL CORPORATION, NIPPON PAINT CO., LTD.
    Inventors: Motohiro Sasaki, Junpei Karoji, Koichi Saito, Atsushi Morishita, Akira Takahashi, Hiroshi Kanai, Masahiro Fuda