Patents by Inventor YUJIRO HAMADA

YUJIRO HAMADA 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).

  • Resin molded body and resin molded body production method
    Patent number: 12679951
    Abstract: Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1/P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm?1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm?1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: July 14, 2026
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yujiro Hamada, Yudai Motomatsu, Masahiko Ono
  • Resin molded body and resin molded body production method
    Patent number: 12583997
    Abstract: Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1/P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm?1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm?1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: March 24, 2026
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yujiro Hamada, Yudai Motomatsu, Masahiko Ono
  • COMPOSITION AND RESIN MOLDED ARTICLE
    Publication number: 20250051561
    Abstract: A composition comprising a (meth)acrylic polymer (A), an antioxidant (B), and a rubber particle (C), wherein a mass ratio of the rubber particle (C)/antioxidant (B) is more than 8 and less than 1000. A method for producing a resin molded article by molding a composition comprising a (meth)acrylic polymer (A), a rubber particle (C), and an antioxidant (B), wherein the composition has a mass ratio of the rubber particle (C)/antioxidant (B) of more than 8 and less than 1000.
    Type: Application
    Filed: August 5, 2024
    Publication date: February 13, 2025
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Yujiro HAMADA
  • Resin Molded Body and Resin Molded Body Production Method
    Publication number: 20220379529
    Abstract: Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1/P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm?1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm?1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.
    Type: Application
    Filed: June 13, 2022
    Publication date: December 1, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yujiro Hamada, Yudai Motomatsu, Masahiko Ono
  • RESIN MOLDED BODY AND RESIN MOLDED BODY PRODUCTION METHOD
    Publication number: 20220251337
    Abstract: Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1/P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm?1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm?1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.
    Type: Application
    Filed: April 27, 2022
    Publication date: August 11, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yujiro HAMADA, Yudai MOTOMATSU, Masahiko ONO
  • COLLAGEN INCORPORATING COSMETICS
    Publication number: 20020150598
    Abstract: Cosmetics incorporating a cosmetic feed containing a dispersion of a collagen association product that is obtained by adjusting an aqueous solution of collagen having a specified isoelectric point to a pH near the isoelectric point.
    Type: Application
    Filed: October 27, 1999
    Publication date: October 17, 2002
    Inventors: YUJIRO HAMADA, KOKICHI SHIRAI, CHIKA SATO, SHINKICHI IRIE, SHUNJI HATTORI, MASARU NISHIZAWA, MASAO TAZAKI