Patents by Inventor Masaaki KUSUMOTO

Masaaki KUSUMOTO 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: 20240228753
    Abstract: A thermoplastic resin composition may include a cellulose ester, a polyester, and a plasticizer. The plasticizer may have a number average molecular weight of 1000 or less. An amount of the polyester may be 120 parts by weight or less per 100 parts by weight of the cellulose ester. An amount of the plasticizer may be less than 100 parts by weight per 100 parts by weight of the cellulose ester.
    Type: Application
    Filed: March 12, 2021
    Publication date: July 11, 2024
    Applicant: Daicel Corporation
    Inventors: Masaaki KUSUMOTO, Hiroki TANIGUCHI, Takafumi KAWASAKI, Akihiro HIGUCHI
  • Publication number: 20240191063
    Abstract: An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater. A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio ? of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.
    Type: Application
    Filed: January 5, 2024
    Publication date: June 13, 2024
    Applicant: DAICEL CORPORATION
    Inventors: Hiroyuki MATSUMURA, Kyokutou GA, Masaaki KUSUMOTO
  • Patent number: 11981796
    Abstract: A cellulose acetate resin composition may include a cellulose acetate (A) having a total degree of acetyl substitution of 2.60 or less; a filler (B); and a plasticizer (C). The filler (B) may be selected from the group consisting of (b1) a predetermined inorganic compound, (b2) a predetermined metal salt, (b3) cellulose or hemicellulose, and (b4) wood flour. The plasticizer (C) may be selected from (c1) a glycerin ester-based plasticizer, (c2) an ether-based plasticizer, and (c3) a glycol ester-based plasticizer. A content of the component (A) may be from 4.5 to 90 mass %. A total content of the component (B) may be from 5 to 50 mass %. A total content of the component (C) may be from 5 to 35 mass %.
    Type: Grant
    Filed: November 1, 2022
    Date of Patent: May 14, 2024
    Assignee: DAICEL CORPORATION
    Inventors: Masaaki Kusumoto, Takafumi Kawasaki, Akihiro Higuchi
  • Patent number: 11920021
    Abstract: An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater. A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio ? of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: March 5, 2024
    Assignee: DAICEL CORPORATION
    Inventors: Hiroyuki Matsumura, Kyokutou Ga, Masaaki Kusumoto
  • Publication number: 20230192993
    Abstract: The cellulose acetate resin composition may include: a cellulose acetate having a total degree of acetyl substitution of 1.9 or greater and 2.6 or less; and a plasticizer. The cellulose acetate may have a number average molecular weight of 45000 or greater and a weight average molecular weight of 70000 or greater. The plasticizer may be selected from (1) an ether-based plasticizer in which at least one terminal hydroxyl group of a polyalkylene glycol is etherified, and (2) an ester-based plasticizer in which at least one terminal hydroxyl group of a polyalkylene glycol is esterified. The polyalkylene glycol in the ether-based plasticizer (1) and the ester-based plasticizer (2) may have a degree of polymerization of 3 or greater and less than 10. The plasticizer may not include an aromatic ring in the terminal group.
    Type: Application
    Filed: February 7, 2023
    Publication date: June 22, 2023
    Applicant: Daicel Corporation
    Inventors: Masaaki KUSUMOTO, Takafumi KAWASAKI, Akihiro HIGUCHI
  • Publication number: 20230130981
    Abstract: This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Applicant: Daicel Corporation
    Inventors: Hiroyuki MATSUMURA, Hiroki TANIGUCHI, Akihiro HIGUCHI, Tomohiro HASHIZUME, Masaaki KUSUMOTO
  • Publication number: 20230055648
    Abstract: A cellulose acetate resin composition may include a cellulose acetate (A) having a total degree of acetyl substitution of 2.60 or less; a filler (B); and a plasticizer (C). The filler (B) may be selected from the group consisting of (b1) a predetermined inorganic compound, (b2) a predetermined metal salt, (b3) cellulose or hemicellulose, and (b4) wood flour. The plasticizer (C) may he selected from (c1) a glycerin ester-based plasticizer, (c2) an ether-based plasticizer, and (c3) a glycol ester-based plasticizer. A content of the component (A) may he from 4.5 to 90 mass %. A total content of the component (B) may be from 5 to 50 mass %. A total content of the component (C) may be from 5 to 35 mass %.
    Type: Application
    Filed: November 1, 2022
    Publication date: February 23, 2023
    Applicant: Daicel Corporation
    Inventors: Masaaki KUSUMOTO, Takafumi KAWASAKI, Akihiro HIGUCHI
  • Patent number: 11572457
    Abstract: This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: February 7, 2023
    Assignee: DAICEL CORPORATION
    Inventors: Hiroyuki Matsumura, Hiroki Taniguchi, Akihiro Higuchi, Tomohiro Hashizume, Masaaki Kusumoto
  • Publication number: 20220267574
    Abstract: An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater. A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio ? of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.
    Type: Application
    Filed: December 9, 2019
    Publication date: August 25, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Hiroyuki MATSUMURA, Kyokutou GA, Masaaki KUSUMOTO
  • Publication number: 20220227973
    Abstract: This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Applicant: Daicel Corporation
    Inventors: Hiroyuki MATSUMURA, Hiroki TANIGUCHI, Akihiro HIGUCHI, Tomohiro HASHIZUME, Masaaki KUSUMOTO