Patents by Inventor Masanori Tomonari

Masanori Tomonari 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).

  • Publication number: 20210017037
    Abstract: The present invention manufactures titanium oxide particles that have a small degree of aggregation (size of aggregate particle diameter relative to primary particle diameter) and are not readily sintered by heating. The present invention has: a step in which an alkali and a solution including a carboxylic acid and a titanium (oxy)chloride are mixed, and the titanium (oxy)chloride is hydrolyzed by neutralization; and a step in which, after the hydrolysis by neutralization, the solution is heated to a temperature of 80° C. or more and 110° C. or less, and the titanium (oxy)chloride remaining in the solution is hydrolyzed by heating.
    Type: Application
    Filed: March 27, 2019
    Publication date: January 21, 2021
    Inventors: Masanori TOMONARI, Kiyonobu IDA, Takuya HOSOKAWA
  • Publication number: 20200347256
    Abstract: Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.
    Type: Application
    Filed: January 28, 2019
    Publication date: November 5, 2020
    Inventors: Masanori TOMONARI, Satoshi NAGAMORI, Yuto KAMEDA
  • Patent number: 10071419
    Abstract: A dispersion comprising at least metallic copper particles with gelatin provided on the surface thereof, a polymeric dispersant, and an organic solvent. The dispersion is produced by reducing copper oxide in an aqueous solvent in the presence of gelatin having an amine number and an acid number wherein the difference (amine number?acid number) is 0 or less, then subjecting the reaction solution to solid-liquid separation, and then mixing the resultant metallic copper particles with gelatin provided on the surface thereof and a polymeric dispersant having an amine number and an acid number wherein the difference (amine number?acid number) is 0 to 50, into an organic solvent. The dispersion maintains dispersion stability of the metallic copper particles for a long time, is suitable for inkjet printing and spray coating and can be used to make microelectrodes and circuit wiring patterns.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: September 11, 2018
    Assignee: ISHIHARA SANGYO KAISHA, LTD.
    Inventors: Masanori Tomonari, Kiyonobu Ida
  • Publication number: 20170252801
    Abstract: Provided are: metallic copper particles exhibiting excellent low-temperature sintering properties at temperatures equal to or lower than 300° C.; and a production method therefor. In these metallic copper particles, metallic copper fine particles are adhered to the surfaces of large-diameter metallic copper particles. With regard to the metallic copper particles to be produced, copper oxide and hypophosphoric acid and/or a salt thereof are mixed and reduced, preferably in the presence of 1-500 mass % of gelatin and/or collagen peptide. The reduction reaction temperature is preferably in the range of 20-100° C. The produced metallic copper particles have a volume resistivity value when heated to a temperature of 300° C. under a nitrogen atmosphere of 1×10-2 ?·cm or less.
    Type: Application
    Filed: August 26, 2015
    Publication date: September 7, 2017
    Inventors: Kiyonobu IDA, Mitsuru WATANABE, Masanori TOMONARI
  • Publication number: 20110155432
    Abstract: Disclosed is a dispersion comprising at least metallic copper particles with gelatin provided on the surface thereof, a polymeric dispersant, and an organic solvent. The dispersion is produced by reducing copper oxide in an aqueous solvent in the presence of gelatin having an amine number and an acid number such that the difference therebetween (amine number?acid number) is 0 or less, then subjecting the reaction solution to solid-liquid separation, and then mixing the resultant metallic copper particles with gelatin provided on the surface thereof and a polymeric dispersant having an amine number and an acid number such that the difference therebetween (amine number?acid number) is 0 to 50, into an organic solvent.
    Type: Application
    Filed: August 28, 2009
    Publication date: June 30, 2011
    Inventors: Masanori Tomonari, Kiyonobu Ida
  • Patent number: 7902292
    Abstract: The present invention relates to two-component paint, which comprises: a first liquid comprising at least one colloidal metal solution which includes at least colloidal metal particles with a sulfur compound of low molecular weight on the particle surfaces and a dispersion medium, the solution containing not less than 1 wt. % of the colloidal metal particles and has a pH of 8-14, and a second liquid comprising at least a curable resin component.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 8, 2011
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventor: Masanori Tomonari
  • Patent number: 7897675
    Abstract: The present invention relates to a process for producing a colloidal metal solution, which comprises a first step of forming colloidal metal particles with a sulfur compound of low molecular weight on the particle surfaces in a solution, a second step of adjusting the solution to a pH of not more than 5, thereby aggregating the colloidal metal particles and recovering the colloidal metal particles by filtration, and a third step of dispersing the recovered colloidal metal particles into a dispersion medium at a pH of 8-14.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 1, 2011
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventor: Masanori Tomonari
  • Patent number: 7828872
    Abstract: There is provided a process comprising mixing a divalent copper oxide with a reducing agent in the presence of a complexing agent and a protective colloid in a liquid medium to thereby produce copper microparticles without formation of a univalent copper oxide from the divalent copper oxide. Further, there is provided a process comprising reducing a divalent copper oxide in the presence of a complexing agent and a protective colloid, such as a protein, to thereby form metallic copper microparticles, adding a protective colloid scavenger, such as a protease, to thereby remove the protective colloid and effect agglomeration of metallic copper microparticles, and filtering the mixture by means of a pressure filter, a vacuum filter, a suction filter, etc.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: November 9, 2010
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Masanori Tomonari, Masatoshi Honma, Yoshiyuki Kunifusa
  • Patent number: 7557149
    Abstract: The present invention relates to a colloidal metal solution comprising colloidal metal particles with a sulfur compound of low molecular weight such as mercaptoacetic acid, mercaptopropionic acid, mercaptoethanol, etc. as a protective colloid on the particle surfaces and having a pH of 8-14. According to the present invention, a colloidal metal solution having a high concentration and a distinguished dispersion stability with a small amount of the protective colloid can be provided with a commercially and economically high advantage without any operation such as centrifuge, etc.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: July 7, 2009
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventor: Masanori Tomonari
  • Publication number: 20080148904
    Abstract: Copper microparticles that are fine and contain substantially none of agglomerated particles. For example, there are provided copper microparticles of 0.005 to 2.0 ?m average particle diameter (D) as measured by an electron microscope, 0.005 to 2.0 ?m average particle diameter (d) as measured by a dynamic light scattering particle size distribution measuring apparatus and 0.7 to 2 d/D ratio. There is provided a process comprising mixing a divalent copper oxide with a reducing agent in the presence of a complexing agent and a protective colloid in a liquid medium to thereby produce copper microparticles without formation of a univalent copper oxide from the divalent copper oxide.
    Type: Application
    Filed: August 18, 2005
    Publication date: June 26, 2008
    Inventors: Masanori Tomonari, Masatoshi Honma, Yoshiyuki Kunifusa
  • Publication number: 20070098909
    Abstract: The present invention relates to a colloidal metal solution comprising colloidal metal particles with a sulfur compound of low molecular weight such as mercaptoacetic acid, mercaptopropionic acid, mercaptoethanol, etc. as a protective colloid on the particle surfaces and having a pH of 8-14. According to the present invention, a colloidal metal solution having a high concentration and a distinguished dispersion stability with a small amount of the protective colloid can be provided with a commercially and economically high advantage without any operation such as centrifuge, etc.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 3, 2007
    Inventor: Masanori Tomonari
  • Publication number: 20070098608
    Abstract: The present invention relates to a colloidal metal solution comprising colloidal metal particles with a sulfur compound of low molecular weight such as mercaptoacetic acid, mercaptopropionic acid, mercaptoethanol, etc. as a protective colloid on the particle surfaces and having a pH of 8-14. According to the present invention, a colloidal metal solution having a high concentration and a distinguished dispersion stability with a small amount of the protective colloid can be provided with a commercially and economically high advantage without any operation such as centrifuge, etc.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 3, 2007
    Inventor: Masanori Tomonari
  • Patent number: 6833088
    Abstract: The organic solvent-based dispersion of conductive powders of the present invention comprises an organic solvent-based medium as a dispersion medium, conductive tin oxide powders coated with an organic metal coupling agent at the surface of tin oxide particles and a dispersant, and shows excellent dispersibility and high transparency. Therefore, the dispersion is useful for antistatic purpose of transparent substrates including the display surface of display devices, their surface protecting materials, films, etc.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: December 21, 2004
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Kaoru Isobe, Masanori Tomonari, Tsutomu Kikuchi
  • Publication number: 20030170382
    Abstract: The present invention relates to a colloidal metal solution comprising colloidal metal particles with a sulfur compound of low molecular weight such as mercaptoacetic acid, mercaptopropionic acid, mercaptoethanol, etc. as a protective colloid on the particle surfaces and having a pH of 8-14. According to the present invention, a colloidal metal solution having a high concentration and a distinguished dispersion stability with a small amount of the protective colloid can be provided with a commercially and economically high advantage without any operation such as centrifuge, etc.
    Type: Application
    Filed: February 10, 2003
    Publication date: September 11, 2003
    Inventor: Masanori Tomonari
  • Patent number: 5759948
    Abstract: The invention provides a titanium oxide photocatalyst having an excellent photocatalytic property and comprising titanium oxide particles which have part or the whole of an iron compound contained therein and supported thereon. The invention further provides a titanium oxide photocatalyst comprising titanium oxide particles which are treated with a mineral acid and which have part or the whole of an iron compound contained therein and supported thereon. The invention still further provides a process for producing the titanium oxide photocatalyst. Utilizing the excellent photocatalytic property, materials which exert or may exert a harmful influence upon human bodies or living environment, such as organic halogen compounds, malodorous gases, oils, bacteria, fungi and algae can be rapidly and effectively removed.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: June 2, 1998
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Yoichi Takaoka, Yoshio Hirobe, Masanori Tomonari, Yoshiki Kinoshita