Patents by Inventor Katsura TSUJIMOTO

Katsura TSUJIMOTO 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: 20230272204
    Abstract: The present disclosure is directed to providing a methacrylic resin composition and a molded article having excellent performances to allow light to be favorably transmitted and sufficiently diffused, and having good heat deformation resistance and long-term use property. A methacrylic resin composition includes 0.5 to 6 parts by mass of a light diffusing filler having an average particle diameter of 0.2 to 10 ?m and 0.005 to 0.3 parts by mass of an ultraviolet absorber with respect to 100 parts by mass of a methacrylic resin, and has an intermediate point glass transition temperature of 105° C. or higher.
    Type: Application
    Filed: August 10, 2021
    Publication date: August 31, 2023
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventor: Katsura TSUJIMOTO
  • Publication number: 20230053691
    Abstract: Provided is a thermoplastic resin composition exhibiting both high transmittance and low haze and having excellent transparency and excellent scratch resistance and toughness. The thermoplastic resin composition of the present disclosure contains 50% to 99% by mass of methacrylic resin (A) and 1% to 50% by mass of thermoplastic polyurethane (B), wherein the methacrylic resin (A) contains 80.0% to 99.9% by mass of methacrylate ester monomer unit, 0.1% to 20.0% by mass of vinyl monomer unit containing a vinyl monomer copolymerizable with a methacrylate ester monomer excluding maleic acid and maleic anhydride, and 0% to 4.0% by mass of maleic acid and/or maleic anhydride monomer unit, and the thermoplastic polyurethane (B) has a structural unit derived from polyester polyol and a structural unit derived from isocyanate having an alicyclic ring.
    Type: Application
    Filed: February 4, 2021
    Publication date: February 23, 2023
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventor: Katsura TSUJIMOTO
  • Patent number: 11180593
    Abstract: The present invention provides a methacrylic resin composition for non-contact hot plate welding comprising a methacrylic resin comprising 80 to 99.9% by mass of a methacrylic acid ester monomer unit and 0.1 to 20% by mass of a unit of at least one additional vinyl monomer copolymerizable with the methacrylic acid ester monomer, wherein the methacrylic resin composition has a melt flow rate (MFR) of 2.5 g/10 min or lower at 230° C. at a load of 3.8 kg.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: November 23, 2021
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masahiro Watanabe, Katsura Tsujimoto, Kazunori Kozawa
  • Publication number: 20190241689
    Abstract: The present invention provides a methacrylic resin composition for non-contact hot plate welding comprising a methacrylic resin comprising 80 to 99.9% by mass of a methacrylic acid ester monomer unit and 0.1 to 20% by mass of a unit of at least one additional vinyl monomer copolymerizable with the methacrylic acid ester monomer, wherein the methacrylic resin composition has a melt flow rate (MFR) of 2.5 g/10 min or lower at 230° C. at a load of 3.8 kg.
    Type: Application
    Filed: April 17, 2019
    Publication date: August 8, 2019
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masahiro WATANABE, Katsura TSUJIMOTO, Kazunori KOZAWA
  • Publication number: 20180208694
    Abstract: The present invention provides a methacrylic resin composition for non-contact hot plate welding comprising a methacrylic resin comprising 80 to 99.9% by mass of a methacrylic acid ester monomer unit and 0.1 to 20% by mass of a unit of at least one additional vinyl monomer copolymerizable with the methacrylic acid ester monomer, wherein the methacrylic resin composition has a melt flow rate (MFR) of 2.5 g/10 min or lower at 230° C. at a load of 3.8 kg.
    Type: Application
    Filed: September 1, 2015
    Publication date: July 26, 2018
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masahiro WATANABE, Katsura TSUJIMOTO, Kazunori KOZAWA
  • Publication number: 20150344645
    Abstract: A molded article contains a methacrylic resin composition containing a methacrylic resin, and has a joining portion for being joined to a different member in at least part of the molded article, wherein a thickness t (mm) of the molded article excluding the joining portion and a resin flow length L (mm) of the molded article satisfy relationships of formulae (1) and (2) below: t<4.0??(1) L/t>100??(2), the methacrylic resin composition has a melt mass-flow rate value a (g/10 min) and a melt mass-flow rate value b (g/10 min) which satisfy relationships of formulae (3) and (4) below: 5.0<b/a??(3) 0.3<a<15??(4) wherein the melt mass-flow rate value a is determined at a load of 3.80 kgf and a test temperature of 230° C., and the melt mass-flow rate value b is determined at a load of 10.19 kgf and a test temperature of 230° C. according to JIS K7210:1999.
    Type: Application
    Filed: May 26, 2015
    Publication date: December 3, 2015
    Applicant: Asahi Kasei Chemicals Corporation
    Inventor: Katsura TSUJIMOTO