Patents by Inventor Mikiko Hojo

Mikiko Hojo 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).

  • Patent number: 9972413
    Abstract: The present invention is to provide a metal particle dispersion for electroconductive substrates, which has high dispersibility and dispersion stability and which is able to form a film that shows high electroconductivity after baking. Disclosed is a metal particle dispersion for electroconductive substrates, comprising metal particles, a dispersant and a solvent, wherein the dispersant is a graft copolymer having at least a constitutional unit represented by the following chemical formula (I) and a constitutional unit represented by the following chemical formula (II): (Symbols in the formulae are as described in the Description.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: May 15, 2018
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yoshinobu Omori, Naonobu Yoshi, Michihiro Ogura, Tomoki Murata, Mikiko Hojo
  • Patent number: 9953740
    Abstract: The present invention is to provide a dispersant which has excellent dispersibility and which is able to inhibit the oxidation of dispersed particles. Disclosed is a dispersant comprising a graft copolymer having a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (II): (Symbols shown in the general formulae (I) and (II) are as described in the Description.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: April 24, 2018
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yoshinobu Omori, Naonobu Yoshi, Michihiro Ogura, Tomoki Murata, Mikiko Hojo
  • Patent number: 9751997
    Abstract: The present invention is to provide a metal particle dispersion which has low viscosity and excellent dispersibility and dispersion stability, and in which the precipitation of the metal particles is inhibited.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 5, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Yoshinobu Omori, Naonobu Yoshi, Mikiko Hojo, Masanori Sawada, Shigehiro Ueno, Shinsuke Nagino
  • Publication number: 20170013711
    Abstract: Provided is a metal microparticle dispersion including metal microparticles, a polymeric dispersant and a dispersion medium, wherein an average primary particle diameter of the metal microparticles is 0.001 to 0.5 ?m; the polymeric dispersant has a polyester skeleton in at least one of a principal chain and a side chain thereof; or the polymeric dispersant has a polyether skeleton in at least one of a principal chain and a side chain thereof; and a content of the above polymeric dispersant is 0.1 to 100 parts by mass based on a content of 100 parts by mass of the metal microparticles. Further, provided is a production process for an electrically conductive substrate, and an electrically conductive substrate produced by the above production process is provided.
    Type: Application
    Filed: September 26, 2016
    Publication date: January 12, 2017
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Mikiko HOJO, Shinya YONEDA, Naonobu YOSHI, Takeshi SATO, Kisei MATSUMOTO
  • Patent number: 9497859
    Abstract: Provided is a metal microparticle dispersion including metal microparticles, a polymeric dispersant and a dispersion medium, wherein an average primary particle diameter of the metal microparticles is 0.001 to 0.5 ?m; the polymeric dispersant has a polyester skeleton in at least one of a principal chain and a side chain thereof; or the polymeric dispersant has a polyether skeleton in at least one of a principal chain and a side chain thereof; and a content of the above polymeric dispersant is 0.1 to 100 parts by mass based on a content of 100 parts by mass of the metal microparticles. Further, provided is a production process for an electrically conductive substrate, and an electrically conductive substrate produced by the above production process is provided.
    Type: Grant
    Filed: September 6, 2010
    Date of Patent: November 15, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Mikiko Hojo, Shinya Yoneda, Naonobu Yoshi, Takeshi Sato, Kisei Matsumoto
  • Patent number: 9420698
    Abstract: Provided is a conductive substrate which is prepared by forming a pattern-shaped metal fine particle sintered film such as a copper wiring and the like on a base material of polyimide and the like and which has a high adhesive property with the base material and is provided with an excellent conductivity. The conductive substrate of the present invention is prepared by printing a coating liquid containing metal or metal oxide fine particles on a base material to form a print layer and subjecting the above print layer to sintering treatment to form a metal fine particle sintered film, wherein a crystallite diameter in the metal fine particle sintered film which is measured by X ray diffraction is 25 nm or more, and a cross section of the metal fine particle sintered film has a void rate of 1% or less.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: August 16, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Naonobu Yoshi, Mikiko Hojo
  • Publication number: 20150299364
    Abstract: The present invention is to provide a dispersant which has excellent dispersibility and which is able to inhibit the oxidation of dispersed particles. Disclosed is a dispersant comprising a graft copolymer having a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (II): (Symbols shown in the general formulae (I) and (II) are as described in the Description.
    Type: Application
    Filed: October 17, 2013
    Publication date: October 22, 2015
    Applicant: DAI NIPPON PRINTING CO., LTD
    Inventors: Yoshinobu OMORI, Naonobu YOSHI, Michihiro OGURA, Tomoki MURATA, Mikiko HOJO
  • Publication number: 20150279505
    Abstract: The present invention is to provide a metal particle dispersion for electroconductive substrates, which has high dispersibility and dispersion stability and which is able to form a film that shows high electroconductivity after baking. Disclosed is a metal particle dispersion for electroconductive substrates, comprising metal particles, a dispersant and a solvent, wherein the dispersant is a graft copolymer having at least a constitutional unit represented by the following chemical formula (I) and a constitutional unit represented by the following chemical formula (II): (Symbols in the formulae are as described in the Description.
    Type: Application
    Filed: October 10, 2013
    Publication date: October 1, 2015
    Inventors: Yoshinobu Omori, Naonobu Yoshi, Michihiro Ogura, Tomoki Murata, Mikiko Hojo
  • Publication number: 20150252157
    Abstract: The present invention is to provide a metal particle dispersion which has low viscosity and excellent dispersibility and dispersion stability, and in which the precipitation of the metal particles is inhibited.
    Type: Application
    Filed: September 27, 2013
    Publication date: September 10, 2015
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Yoshinobu Omori, Naonobu Yoshi, Mikiko Hojo, Masanori Sawada, Shigehiro Ueno, Shinsuke Nagino
  • Publication number: 20120267151
    Abstract: Provided are a metal microparticle dispersion which is excellent in a dispersibility, an electrically conductive substrate which is obtained by using the above metal microparticle dispersion and which is excellent in an electrical conductivity and a production process for the same. Provided is a metal microparticle dispersion comprising metal microparticles, a polymeric dispersant and a dispersion medium, wherein an average primary particle diameter of the metal microparticles is 0.001 to 0.
    Type: Application
    Filed: September 6, 2010
    Publication date: October 25, 2012
    Inventors: Mikiko Hojo, Shinya Yoneda, Naonobu Yoshi, Takeshi Sato, Kisei Matsumoto
  • Publication number: 20120061130
    Abstract: Provided is a conductive substrate which is prepared by forming a pattern-shaped metal fine particle sintered film such as a copper wiring and the like on a base material of polyimide and the like and which has a high adhesive property with the base material and is provided with an excellent conductivity. The conductive substrate of the present invention is prepared by printing a coating liquid containing metal or metal oxide fine particles on a base material to form a print layer and subjecting the above print layer to sintering treatment to form a metal fine particle sintered film, wherein a crystallite diameter in the metal fine particle sintered film which is measured by X ray diffraction is 25 nm or more, and a cross section of the metal fine particle sintered film has a void rate of 1% or less.
    Type: Application
    Filed: February 19, 2010
    Publication date: March 15, 2012
    Inventors: Naonobu Yoshi, Mikiko Hojo
  • Patent number: 7776436
    Abstract: A hardcoat for a plastic substrate film is provided which has good suitability for printing and satisfactory hardness, can prevent influence of the deformation of a plastic substrate film from extending to the hardcoat, and is resistant to cracking and peeling. The hardcoat is produced from a coating component containing one or more organic components having a polymerizable functional group and an inorganic filler, at least one of the organic components being free from a hydrogen bond-forming group. In the hard coat, the content of the inorganic filler in the surface of the hardcoat is higher than that in the interior of the hardcoat. The hardcoat can be applied to antireflection films and hologram labels.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: August 17, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Yurie Ota, Nobuko Takahashi, Noboru Kunimine, Satoshi Shioda, Mikiko Hojo
  • Patent number: 7420005
    Abstract: The photocurable resin composition in the first aspect of the invention comprises, as essential components, (A) a binder resin having photopolymerizable functional groups and (B) inorganic superfine particles in the order of sub-micron which can be dispersed in a colloidal form; the photocurable resin composition in the second aspect comprises, as essential components, (C) a binder resin containing photopolymerizable functional groups and (D) hydrophobic fine silica particles; and the photocurable resin composition in the third aspect comprises, as essential components, (E) a binder resin containing acrylic resin and urethane acrylate resin and/or polyester acrylate having photopolymerizable functional groups and (F) an organometallic coupling agent.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: September 2, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Mikiko Hojo, Toshio Yoshihara
  • Patent number: 7141336
    Abstract: Disclosed is a hologram transfer film which can realize easy and good transfer of a hologram and, at the same time, can realize stable transfer of the hologram in a transfer process. The hologram transfer film comprises: a substrate film; and a transfer layer provided on the substrate film, the transfer layer comprising a hologram-forming layer and a heat-sensitive adhesive layer provided in that order on the substrate film, the hologram-forming layer having a breaking strain of 0.5 to 15% at 25° C. and a breaking strain of 0.5 to 30% at 120° C.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: November 28, 2006
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Satoshi Shioda, Mikiko Hojo, Hiroyuki Otaki, Kenji Ueda, Tetsuya Toshine
  • Publication number: 20040028881
    Abstract: A hardcoat for a plastic substrate film is provided which has good suitability for printing and satisfactory hardness, can prevent influence of the deformation of a plastic substrate film from extending to the hardcoat, and is resistant to cracking and peeling. The hardcoat is produced from a coating component containing one or more organic components having a polymerizable functional group and an inorganic filler, at least one of the organic components being free from a hydrogen bond-forming group. In the hard coat, the content of the inorganic filler in the surface of the hardcoat is higher than that in the interior of the hardcoat. The hardcoat can be applied to antireflection films and hologram labels.
    Type: Application
    Filed: August 12, 2003
    Publication date: February 12, 2004
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Yurie Ota, Nobuko Takahashi, Noboru Kunimine, Satoshi Shioda, Mikiko Hojo
  • Patent number: 6638606
    Abstract: A hardcoat for a plastic substrate film is provided which has good suitability for printing and satisfactory hardness, can prevent influence of the deformation of a plastic substrate film from extending to the hardcoat, and is resistant to cracking and peeling. The hardcoat is produced from a coating component containing one or more organic components having a polymerizable functional group and an inorganic filler, at least one of the organic components being free from a hydrogen bond-forming group. In the hard coat, the content of the inorganic filler in the surface of the hardcoat is higher than that in the interior of the hardcoat. The hardcoat can be applied to antireflection films and hologram labels.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: October 28, 2003
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Yurie Ota, Nobuko Takahashi, Noboru Kunimine, Satoshi Shioda, Mikiko Hojo
  • Publication number: 20030129385
    Abstract: The photocurable resin composition in the first aspect of the invention comprises, as essential components, (A) a binder resin having photopolymerizable functional groups and (B) inorganic superfine particles in the order of sub-micron which can be dispersed in a colloidal form; the photocurable-resin composition in the second aspect comprises, as essential components, (C) a binder resin containing photopolymerizable functional groups and (D) hydrophobic fine silica particles; and the photocurable resin composition in the third aspect comprises, as essential components, (E) a binder resin containing acrylic resin and urethane acrylate resin and/or polyester acrylate having photopolymerizable functional groups and (F) an organometallic coupling agent.
    Type: Application
    Filed: June 24, 2002
    Publication date: July 10, 2003
    Inventors: Mikiko Hojo, Toshio Yoshihara
  • Publication number: 20030124436
    Abstract: Disclosed is a hologram transfer film which can realize easy and good transfer of a hologram and, at the same time, can realize stable transfer of the hologram in a transfer process. The hologram transfer film comprises: a substrate film; and a transfer layer provided on the substrate film, the transfer layer comprising a hologram-forming layer and a heat-sensitive adhesive layer provided in that order on the substrate film, the hologram-forming layer having a breaking strain of 0.5 to 15% at 25° C. and a breaking strain of 0.5 to 30% at 120° C.
    Type: Application
    Filed: October 8, 2002
    Publication date: July 3, 2003
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Satoshi Shioda, Mikiko Hojo, Hiroyuki Otaki, Kenji Ueda, Tetsuya Toshine
  • Patent number: 6495295
    Abstract: Disclosed is a hologram transfer film which can realize easy and good transfer of a hologram and, at the same time, can realize stable transfer of the hologram in a transfer process. The hologram transfer film comprises: a substrate film; and a transfer layer provided on the substrate film, the transfer layer comprising a hologram-forming layer and a heat-sensitive adhesive layer provided in that order on the substrate film, the hologram-forming layer having a breaking strain of 0.5 to 15% at 25° C. and a breaking strain of 0.5 to 30% at 120° C.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: December 17, 2002
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Satoshi Shioda, Mikiko Hojo, Hiroyuki Otaki, Kenji Ueda, Tetsuya Toshine
  • Publication number: 20020098350
    Abstract: A hardcoat for a plastic substrate film is provided which has good suitability for printing and satisfactory hardness, can prevent influence of the deformation of a plastic substrate film from extending to the hardcoat, and is resistant to cracking and peeling. The hardcoat is produced from a coating component containing one or more organic components having a polymerizable functional group and an inorganic filler, at least one of the organic components being free from a hydrogen bond-forming group. In the hard coat, the content of the inorganic filler in the surface of the hardcoat is higher than that in the interior of the hardcoat. The hardcoat can be applied to antireflection films and hologram labels.
    Type: Application
    Filed: January 16, 2002
    Publication date: July 25, 2002
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Toshio Yoshihara, Yurie Ota, Nobuko Takahashi, Noboru Kunimine, Satoshi Shioda, Mikiko Hojo