Patents by Inventor Shiroshi Matsuki

Shiroshi Matsuki 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: 20240076413
    Abstract: An object of the present invention is to stably and efficiently provide an oxidized cellulose having excellent fibrillatability. The above object can be achieved by a method of producing an oxidized cellulose, which contains an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, is substantially free of N-oxyl compounds, and has a degree of polymerization of 600 or less, the method including a step of obtaining an oxidized cellulose by oxidizing a cellulose raw material using a hypochlorous acid or a salt thereof, wherein viscosity of a slurry of the cellulose raw material having the same concentration as when the oxidation is performed is in a range of 1,000 Pa·s or less at 30° C. or 40° C.
    Type: Application
    Filed: December 22, 2021
    Publication date: March 7, 2024
    Applicant: TOAGOSEI CO., LTD.
    Inventors: Shiroshi MATSUKI, Toshihiko TSUIKI, Hidenari KAYANO, Hayato YOSHIKAWA, Daisuke KAMIYA
  • Patent number: 11919974
    Abstract: Provided is an oxidized cellulose, a 13C solid-state NMR spectrum of the oxidized cellulose including a number of peaks in a range of from 165 ppm to 185 ppm, which can be produced by oxidizing a cellulose raw material with a hypochlorous acid or salt thereof having an available chlorine concentration of from 6% by mass to 14% by mass, while adjusting the pH in a range of from 5.0 to 14.0.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: March 5, 2024
    Assignee: TOAGOSEI CO., LTD.
    Inventors: Daisuke Kamiya, Shiroshi Matsuki, Jun Takada
  • Patent number: 11891501
    Abstract: A method of producing a resin modifier, the method comprising a process of polymerizing an ethylene unsaturated monomer in the presence of a cellulose nanofiber, the cellulose nanofiber being reacted with an amine or a quaternary ammonium salt compound.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: February 6, 2024
    Assignees: TOAGOSEI CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Daisuke Kamiya, Akihiro Gotou, Shun Nakano, Shiroshi Matsuki, Shuji Fujisawa, Tsuguyuki Saito, Ryo Saito
  • Publication number: 20240010756
    Abstract: The present invention has an object to provide an efficient production method of a nanocellulose-containing composition. The object can be achieved by a production method of a composition containing nanocellulose, including: a step of stirring a mixture containing oxidized cellulose and a component constituting the composition other than the nanocellulose to fibrillate the oxidized cellulose into the nanocellulose, wherein the oxidized cellulose includes an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof.
    Type: Application
    Filed: November 11, 2021
    Publication date: January 11, 2024
    Applicant: TOAGOSEI CO., LTD.
    Inventors: Shiroshi MATSUKI, Toshihiko TSUIKI, Daisuke KAMIYA, Eiichi OKAZAKI, Hidenari KAYANO
  • Publication number: 20230407054
    Abstract: A resin composition containing a nanocellulose and a polymer of an ethylenically unsaturated monomer, wherein the nanocellulose contains an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, is substantially free of a N-oxyl compound, and satisfies following (I) and/or (II): (I) zeta potential is ?30 mV or less; and (II) light transmittance in a mixed solution in which the nanocellulose and water are mixed and which has a solid content concentration of 0.1 mass % is 95% or more.
    Type: Application
    Filed: September 15, 2021
    Publication date: December 21, 2023
    Applicant: TOAGOSEI CO., LTD.
    Inventors: Daisuke KAMIYA, Shiroshi MATSUKI, Akihiro GOTOU, Gen OKABE
  • Publication number: 20230250198
    Abstract: The present invention provides a nanocellulose that does not contain a N-oxyl compound in the cellulose fibers, exhibits an excellent dispersion stability in dispersion media, is the oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, and has an average fiber width of from at least 1 nm to not more than 200 nm. The nanocellulose substantially does not contain a N-oxyl compound and has a zeta potential of less than or equal to ?30 mV.
    Type: Application
    Filed: July 9, 2021
    Publication date: August 10, 2023
    Applicant: TOAGOSEI CO., LTD.,
    Inventors: Shiroshi MATSUKI, Toshihiko TSUIKI, Jun TAKADA, Hidenari KAYANO
  • Publication number: 20230250197
    Abstract: The present invention provides an oxidized cellulose that exhibits an excellent fibrillatability and is an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof. The oxidized cellulose substantially does not contain a N-oxyl compound and has a degree of polymerization of not more than 600.
    Type: Application
    Filed: July 9, 2021
    Publication date: August 10, 2023
    Applicant: TOAGOSEI CO., LTD.
    Inventors: Shiroshi MATSUKI, Toshihiko TSUIKI, Jun TAKADA, Hidenari KAYANO
  • Patent number: 11713360
    Abstract: An object of the present invention is to provide an efficient method for producing cellulose nanofibers, without N-oxyl compounds such as TEMPO remaining in the cellulose nanofibers. Provided is a method for producing cellulose nanofibers, the method including: oxidizing a cellulose raw material with hypochlorous acid, or a salt thereof, having an available chlorine concentration of from 14% by mass to 43% by mass, to produce an oxidized cellulose; and fibrillating the oxidized cellulose into nanofibers.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: August 1, 2023
    Assignee: TOAGOSEI CO., LTD.
    Inventors: Daisuke Kamiya, Shiroshi Matsuki
  • Publication number: 20220186015
    Abstract: A method of producing a resin modifier, the method comprising a process of polymerizing an ethylene unsaturated monomer in the presence of a cellulose nanofiber, the cellulose nanofiber being reacted with an amine or a quaternary ammonium salt compound.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 16, 2022
    Inventors: Daisuke KAMIYA, Akihiro GOTOU, Shun NAKANO, Shiroshi MATSUKI, Shuji FUJISAWA, Tsuguyuki SAITO, Ryo SAITO
  • Publication number: 20210301034
    Abstract: Provided is an oxidized cellulose, a 13C solid-state NMR spectrum of the oxidized cellulose including a number of peaks in a range of from 165 ppm to 185 ppm, which can be produced by oxidizing a cellulose raw material with a hypochlorous acid or salt thereof having an available chlorine concentration of from 6% by mass to 14% by mass, while adjusting the pH in a range of from 5.0 to 14.0.
    Type: Application
    Filed: August 2, 2019
    Publication date: September 30, 2021
    Inventors: Daisuke KAMIYA, Shiroshi MATSUKI, Jun TAKADA
  • Publication number: 20200270369
    Abstract: An object of the present invention is to provide an efficient method for producing cellulose nanofibers, without N-oxyl compounds such as TEMPO remaining in the cellulose nanofibers. Provided is a method for producing cellulose nanofibers, the method including: oxidizing a cellulose raw material with hypochlorous acid, or a salt thereof, having an available chlorine concentration of from 14% by mass to 43% by mass, to produce an oxidized cellulose; and fibrillating the oxidized cellulose into nanofibers.
    Type: Application
    Filed: June 1, 2018
    Publication date: August 27, 2020
    Applicant: TOAGOSEI CO., LTD.
    Inventors: Daisuke KAMIYA, Shiroshi MATSUKI
  • Publication number: 20020053518
    Abstract: A copper electroplating material capable of exhibiting increased easy-dissolution properties, to thereby minimize formation of an insoluble residue. Basic copper carbonate is formed in a reaction tank by deposition and heated to a temperature of between 250° C. and 800° C. and preferably between 350° C. and 600° C. in an atmosphere which does not form a reducing atmosphere which does not form a reducing atmosphere, to thereby be subjected to thermal decomposition, resulting in providing easily soluble copper oxide. The copper oxide is washed with water and dewatered using, for example, a centrifugal separator. Then, the copper oxide is dried.
    Type: Application
    Filed: September 4, 2001
    Publication date: May 9, 2002
    Applicant: TSURUMI SODA CO., LTD.
    Inventors: Shiroshi Matsuki, Kazunori Akiyama