Patents by Inventor Aoi DAITO

Aoi DAITO 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).

  • Patent number: 11261303
    Abstract: A method for producing a polyimide resin film, including: a coating step of forming a coated film by coating a polyimide resin composition containing a polyimide resin, an antioxidant, and a solvent on a substrate; and a drying step of drying the coated film in air at 180° C. or more, the antioxidant being a phenol-based antioxidant, and a content of the phenol-based antioxidant being 0.05 part by mass or more per 100 parts by mass of the polyimide resin.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: March 1, 2022
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Aoi Daito, Shinji Sekiguchi
  • Publication number: 20210395568
    Abstract: A polyimide resin includes structural unit A derived from tetracarboxylic dianhydride and structural unit B derived from diamine, wherein unit A includes at least one unit selected from the group consisting of unit (A-1) derived from a compound represented by Formula (a-1) and unit (A-2) derived from a compound represented by Formula (a-2), and unit B includes unit (B-1) derived from a compound represented by Formula (b-1) and includes unit (B-2) derived from a compound represented by Formula (b-2). wherein X represents a single bond or an oxygen atom, and Ar represents a substituted or unsubstituted arylene group. wherein Z1/Z2 represent a divalent aliphatic or aromatic group, R1/R2 represent a monovalent aromatic or aliphatic group, R3/R4 represent a monovalent aliphatic group, R5/R6 represent a monovalent aliphatic or aromatic group, m&n represent an integer of 1 or greater, and a sum of m+n represents an integer from 2-1000.
    Type: Application
    Filed: November 12, 2019
    Publication date: December 23, 2021
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yohei ABIKO, Aoi DAITO, Shinji SEKIGUCHI
  • Patent number: 10954339
    Abstract: Provided is a polyimide resin composition and a production method thereof, wherein the polyimide resin composition contains an alicyclic polyimide resin having a structural unit represented by the following general formula (1) and inorganic particles of at least one selected from the group consisting of titanium dioxide, barium titanate, and zirconium oxide, wherein the alicyclic polyimide resin has a glass transition temperature of 260° C. or higher, wherein R1 represents a tetravalent alicyclic hydrocarbon group having a carbon number of from 4 to 22, and R2 represents a divalent aliphatic hydrocarbon group having a carbon number of from 2 to 28 and/or a divalent aromatic hydrocarbon group having a carbon number of from 6 to 27.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: March 23, 2021
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Kazuaki Mukasa, Yohei Abiko, Aoi Daito, Shinji Sekiguchi
  • Patent number: 10920018
    Abstract: A polyimide resin including a structural unit A derived from a tetracarboxylic dianhydride and a structural unit B derived from a diamine compound, wherein the structural unit A includes a structural unit (A-1) derived from a compound represented by the following formula (a-1), and the structural unit B includes a structural unit (B-1) derived from a compound represented by the following formula (b-1): wherein m and n in the formula (b-1) each independently are an integer of 0 or 1.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 16, 2021
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yohei Abiko, Saeko Sato, Aoi Daito, Shinji Sekiguchi
  • Publication number: 20200385523
    Abstract: A polyimide containing a repeating unit represented by the following formula (I) and a repeating unit represented by the following formula (II). In the formula (II), R each independently represents a hydrogen atom, a fluorine atom, or a methyl group.
    Type: Application
    Filed: March 23, 2018
    Publication date: December 10, 2020
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Aoi DAITO, Shuya SUENAGA
  • Publication number: 20200055987
    Abstract: A polyimide resin including a structural unit A derived from a tetracarboxylic dianhydride and a structural unit B derived from a diamine compound, wherein the structural unit A includes a structural unit (A-1) derived from a compound represented by the following formula (a-1), and the structural unit B includes a structural unit (B-1) derived from a compound represented by the following formula (b-1): wherein m and n in the formula (b-1) each independently are an integer of 0 or 1.
    Type: Application
    Filed: April 21, 2017
    Publication date: February 20, 2020
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Yohei ABIKO, Saeko SATO, Aoi DAITO, Shinji SEKIGUCHI
  • Publication number: 20200002477
    Abstract: Provided is a polyimide resin composition and a production method thereof, wherein the polyimide resin composition contains an alicyclic polyimide resin having a structural unit represented by the following general formula (1) and inorganic particles of at least one selected from the group consisting of titanium dioxide, barium titanate, and zirconium oxide, wherein the alicyclic polyimide resin has a glass transition temperature of 260° C. or higher, wherein R1 represents a tetravalent alicyclic hydrocarbon group having a carbon number of from 4 to 22, and R2 represents a divalent aliphatic hydrocarbon group having a carbon number of from 2 to 28 and/or a divalent aromatic hydrocarbon group having a carbon number of from 6 to 27.
    Type: Application
    Filed: March 31, 2017
    Publication date: January 2, 2020
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Kazuaki MUKASA, Yohei ABIKO, Aoi DAITO, Shinji SEKIGUCHI
  • Publication number: 20190185631
    Abstract: A method for producing a polyimide resin film, including: a coating step of forming a coated film by coating a polyimide resin composition containing a polyimide resin, an antioxidant, and a solvent on a substrate; and a drying step of drying the coated film in air at 180° C. or more, the antioxidant being a phenol-based antioxidant, and a content of the phenol-based antioxidant being 0.05 part by mass or more per 100 parts by mass of the polyimide resin.
    Type: Application
    Filed: July 19, 2017
    Publication date: June 20, 2019
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Aoi DAITO, Shinji SEKIGUCHI