Patents by Inventor Kouichi Endo

Kouichi Endo 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: 10927263
    Abstract: An object of the present invention is to provide a polymerizable composition with which a polymer having a high degree of hardness can be produced. Another object is to provide, for example, an optically anisotropic body, a phase retardation film, an optical compensation film, an antireflection film, a lens, and a lens sheet that are composed of the polymerizable composition and a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a coloring agent, a security marker, a laser emission member, a polarizing film, a coloring material, and a printed item that are produced using the polymerizable composition. The present invention provides a polymerizable composition including a polymerizable compound represented by General Formula (IA) which has a specific structure including a plurality of polymerizable groups.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 23, 2021
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Mika Takasaki
  • Patent number: 10655066
    Abstract: The problem that the present invention is to solve is to provide an optical film that has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state. The present invention provides an optical film containing a structural unit derived from a specific compound, that is, an optical film containing a structural unit derived from a compound represented by the general formula (I), which has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state, and also provides a display device including the optical film.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: May 19, 2020
    Assignee: DIC Corporation
    Inventors: Masahiro Horiguchi, Sayaka Nose, Yasuhiro Kuwana, Kouichi Endo
  • Publication number: 20190369315
    Abstract: The optical film (retardation film) has a good antireflection ability not only in a direction perpendicular to the film but also over a wide angle range and provides an optical film that can maintain its ability even after the film is subjected to high temperature. It can provide an elliptically polarizing plate and a display device that use the optical film. The optical film includes a first retardation layer and a second retardation layer. The first retardation layer is formed of a cured product of a polymerizable composition containing at least one compound A having at least three polymerizable groups and satisfying (formula 1) and at least one compound B satisfying (formula 2). The second retardation layer is formed of a cured product of a polymerizable composition containing at least one compound satisfying (formula 1) and/or at least one compound B satisfying (formula 2).
    Type: Application
    Filed: November 7, 2017
    Publication date: December 5, 2019
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Kazuaki Hatsusaka, Mika Takasaki
  • Patent number: 10479844
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 19, 2019
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20190264034
    Abstract: An object of the present invention is to provide a polymerizable composition with which a polymer having a high degree of hardness can be produced. Another object is to provide, for example, an optically anisotropic body, a phase retardation film, an optical compensation film, an antireflection film, a lens, and a lens sheet that are composed of the polymerizable composition and a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a coloring agent, a security marker, a laser emission member, a polarizing film, a coloring material, and a printed item that are produced using the polymerizable composition. The present invention provides a polymerizable composition including a polymerizable compound represented by General Formula (IA) which has a specific structure including a plurality of polymerizable groups.
    Type: Application
    Filed: July 13, 2017
    Publication date: August 29, 2019
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Mika Takasaki
  • Publication number: 20190233565
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having, in its molecule, a pentaerythritol skeleton or a dipentaerythritol skeleton. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Application
    Filed: January 12, 2016
    Publication date: August 1, 2019
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20190153125
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Application
    Filed: January 16, 2019
    Publication date: May 23, 2019
    Applicant: DIC CORPORATION
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Patent number: 10253125
    Abstract: There is provided a polymerizable liquid crystal composition that enables a film formed through application of the composition and exposure thereof to heat or active energy rays to have an excellent molecular alignment and reduced haze. There is also provided an optically anisotropic body that is produced by using such a polymerizable liquid crystal composition and that has a good transparency. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable haze-reducing agent and a polymerizable liquid crystal compound. Furthermore, the present invention also provides an optically anisotropic body produced by using the polymerizable liquid crystal composition of the present invention.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: April 9, 2019
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Mika Yamamoto, Kazuaki Hatsusaka
  • Patent number: 10202470
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: February 12, 2019
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20180361326
    Abstract: The present invention aims to provide a gas-selective permeable membrane that has gas permeability and gas selectivity capable of highly separating a target gas from other gases, is less likely to be influenced by the temperature condition employed, and is excellent in strength and handleability. The invention uses at least one or more polymerizable compounds to provide a gas-selective permeable film that contains a polymer having an optically uniaxial or multiaxial molecular alignment and to provide a laminate including a gas-permeable substrate and the permeable membrane laminated thereon.
    Type: Application
    Filed: November 8, 2016
    Publication date: December 20, 2018
    Applicant: DIC Corporation
    Inventors: Yasuhiro Kuwana, Kouichi Endo, Isa Nishiyama, Susumu Matsuzaki, Yutaka Kadomoto
  • Publication number: 20180362849
    Abstract: The present invention provides a polymerizable liquid crystal composition capable of forming a uniform homeotropic alignment in producing a polymer through polymerization of the polymerizable liquid crystal composition. Further, the present invention provides a polymer obtained through polymerization of the polymerizable liquid crystal composition and having good alignment performance and high durability (retardation retention) with little cissing, and an optically anisotropic body using the polymer. Specifically, the present invention provides a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound represented by the general formula (II-1), one or more kinds of polymerizable liquid crystal compounds (II-2) having one polymerizable functional group and/or one or more kinds of polymerizable liquid crystal compounds having 2 or more polymerizable functional groups in the molecule and represented by the general formula (I-1).
    Type: Application
    Filed: June 7, 2016
    Publication date: December 20, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana
  • Publication number: 20180346614
    Abstract: A polymerizable composition excellent in solubility and having high storage stability with no crystal precipitation or the like; a polymerizable composition capable of being formed into a polymer excellent in alignment performance and leveling performance, hardly having defects, cissing and unevenness and hardly causing appearance failure owing to surfactant offset; and a polymer, an optically anisotropic body, a display element, a light-emitting element and the like using the polymerizable composition are provided. Specifically, the invention provides a polymerizable composition containing a) one or two or more polymerizable compounds each having one polymerizable group or two or more polymerizable groups and satisfying a formula (I) Re(450 nm)/Re(550 nm)<1.0 (I), and b) one or two or more compounds represented by the general formula (B).
    Type: Application
    Filed: November 8, 2016
    Publication date: December 6, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Kazuaki Hatsusaka, Mika Takasaki
  • Publication number: 20180327669
    Abstract: An object of the present invention is to provide a powder mixture containing a polymerizable liquid crystal compound, the powder mixture having a low risk of occurrence of fire due to the flammability of solvent, causing no changes in the appearance due to, for example, precipitation or crystallization of the solute during storage at low temperatures, causing no changes in the composition due to evaporation of solvent during long-term storage or leakage of solvent during long-term storage or transportation, being not viscous and having fluidity unlike nematic liquid crystal compositions, and being easily handled. Another object is to provide a nematic liquid crystal composition, a solution composition, cured products, optical films, and display devices that employ the above-described powder mixture.
    Type: Application
    Filed: July 14, 2016
    Publication date: November 15, 2018
    Applicant: DIC Corporation
    Inventors: Kazuaki Hatsusaka, Yasuhiro Kuwana, Kouichi Endo, Toru Ishii, Mika Yamamoto
  • Publication number: 20180277780
    Abstract: The present invention provides a polymerizable composition having excellent solubility and high storage stability with no precipitation of crystals or the like, and provides a polymerizable composition that is unlikely to develop unevenness when a polymer of the composition is produced and is unlikely to deteriorate the appearance due to offset of the surfactant. Also provided are a polymer, optically anisotropic body, display element, light-emitting element, and the like using the polymerizable composition. Specifically, provided is a polymerizable composition a) one or more polymerizable compounds having one polymerizable group or two or more polymerizable groups that satisfy formula (I) Re(450 nm)/Re(550 nm)<1.0 (I) and b) a surfactant having a weight average molecular weight of 5000 or higher. Also provided are a polymer, optically anisotropic body, display element, light-emitting element, and the like using the polymerizable composition.
    Type: Application
    Filed: September 15, 2016
    Publication date: September 27, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Kazuaki Hatsusaka, Mika Takasaki
  • Publication number: 20180265609
    Abstract: The present invention provides a polymerizable liquid crystal composition including a specific polymerizable compound and a fluorosurfactant having a pentaerythritol skeleton or a dipentaerythritol skeleton in the molecule. In addition, an optically anisotropic body, a phase difference film, an antireflection film, and a liquid crystal display device, which are produced by using the polymerizable liquid crystal composition according to the present invention, are provided. The present invention is useful because three properties, that is, leveling properties of the surface of an optically anisotropic body, offset to a base material, and alignment properties of a liquid crystal can be improved at the same time in the case where the optically anisotropic body is produced by photopolymerizing the polymerizable liquid crystal composition.
    Type: Application
    Filed: January 7, 2016
    Publication date: September 20, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Mika Yamamoto, Kazuaki Hatsusaka
  • Publication number: 20180037819
    Abstract: The problem that the present invention is to solve is to provide an optical film that has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state. The present invention provides an optical film containing a structural unit derived from a specific compound, that is, an optical film containing a structural unit derived from a compound represented by the general formula (I), which has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state, and also provides a display device including the optical film.
    Type: Application
    Filed: August 3, 2017
    Publication date: February 8, 2018
    Inventors: Masahiro HORIGUCHI, Sayaka NOSE, Yasuhiro KUWANA, Kouichi ENDO
  • Publication number: 20180016502
    Abstract: The present invention provides a polymerizable composition containing: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I) Re(450 nm)/Re(550 nm)<1.0; and??(I) b) an organic solvent having a solubility parameter (SP value) of 8.50 to 11.00 (cal/cm3)0.5, a boiling point of 75 to 180° C., and an evaporation rate index of 20 to 700. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The polymerizable composition of the present invention is useful because it is excellent in solubility and has high storage stability that prevents the occurrence of precipitation of crystals. When the composition is polymerized to produce a film-shaped polymer, uneven application is less likely to occur while the liquid crystal alignment is maintained.
    Type: Application
    Filed: January 14, 2016
    Publication date: January 18, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20180002459
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Application
    Filed: December 17, 2015
    Publication date: January 4, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20180002460
    Abstract: The polymerizable composition contains: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I): Re(450 nm)/Re(550 nm)<1.0??(I); b) at least one photopolymerization initiator selected from the group consisting of alkylphenone-based compounds, acylphosphine oxide-based compounds, and oxime ester-based compounds; and c) a polymerization inhibitor. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable liquid crystal composition. The polymerizable composition of the present invention is excellent in solubility and has high storage stability, so that no precipitation of crystals etc. occurs. When a film-shaped polymer is produced by polymerizing the above composition, the unevenness of the surface of the coating film is small while the alignment of the liquid crystal is maintained, and high durability is obtained.
    Type: Application
    Filed: January 12, 2016
    Publication date: January 4, 2018
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Publication number: 20170355907
    Abstract: The present invention provides a polymerizable liquid crystal composition including a specific polymerizable compound and a fluorosurfactant having specific polyoxyalkylene skeleton and molecular weight. Also, an optically anisotropic body, a phase difference film, an antireflection film, and a liquid crystal display device, which are produced by using the polymerizable liquid crystal composition according to the present invention, are provided. The present invention is useful because three properties, that is, leveling properties of the surface of an optically anisotropic body, offset to a base material, and alignment properties of a liquid crystal can be improved at the same time in the case where the optically anisotropic body is produced by photopolymerizing the polymerizable liquid crystal composition.
    Type: Application
    Filed: December 10, 2015
    Publication date: December 14, 2017
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka