Patents by Inventor Nobukatsu SHIGI

Nobukatsu SHIGI 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).

  • Hydrotalcite particles, method for producing hydrotalcite particles, resin stabilizer containing hydrotalcite particles, and resin composition containing hydrotalcite particles
    Patent number: 11873230
    Abstract: A method for producing hydrotalcite particles includes dissolving aluminum hydroxide in an alkaline solution to prepare an aluminate solution, causing a reaction of the aluminate solution prepared in the first step with carbon dioxide to precipitate a low-crystallinity aluminum compound, causing a first-order reaction by mixing the low-crystallinity aluminum compound with a magnesium compound to prepare a reactant containing hydrotalcite nuclear particles, and causing a hydrothermal reaction of the reactant to synthesize hydrotalcite particles. The hydrotalcite particles can impart excellent heat resistance, transparency, flowability, and are useful as a resin stabilizer.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: January 16, 2024
    Assignees: TODA KOGYO CORP., SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Koji Kakuya, Atsuko Yasunaga, Nobukatsu Shigi
  • HYDROTALCITE PARTICLES, METHOD FOR PRODUCING HYDROTALCITE PARTICLES, RESIN STABILIZER CONTAINING HYDROTALCITE PARTICLES, AND RESIN COMPOSITION CONTAINING HYDROTALCITE PARTICLES
    Publication number: 20200361780
    Abstract: A method for producing hydrotalcite particles includes dissolving aluminum hydroxide in an alkaline solution to prepare an aluminate solution, causing a reaction of the aluminate solution prepared in the first step with carbon dioxide to precipitate a low-crystallinity aluminum compound, causing a first-order reaction by mixing the low-crystallinity aluminum compound with a magnesium compound to prepare a reactant containing hydrotalcite nuclear particles, and causing a hydrothermal reaction of the reactant to synthesize hydrotalcite particles. The hydrotalcite particles can impart excellent heat resistance, transparency, flowability, and are useful as a resin stabilizer.
    Type: Application
    Filed: December 17, 2018
    Publication date: November 19, 2020
    Inventors: Koji KAKUYA, Atsuko YASUNAGA, Nobukatsu SHIGI