Patents by Inventor Mika Takasaki

Mika Takasaki 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: 10649124
    Abstract: A polymerizable composition of the present invention has favorable solubility, and an optically anisotropic body using the polymerizable composition is unlikely to discolor and is excellent in heat resistance and light resistance. The problem to be solved by the present invention is to provide a polymer obtained by polymerizing the polymerizable composition and an optically anisotropic body using the polymer. The present invention relates to a polymerizable composition which includes a compound having at least one mesogenic group and satisfying an expression represented by Expression (1), and which satisfies an expression represented by Expression (2). 0.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 12, 2020
    Assignee: DIC CORPORATION
    Inventors: Mika Takasaki, Masahiro Horiguchi, Yasuhiro Kuwana
  • 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
  • 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: 20190025490
    Abstract: A polymerizable composition of the present invention has favorable solubility, and an optically anisotropic body using the polymerizable composition is unlikely to discolor and is excellent in heat resistance and light resistance. The problem to be solved by the present invention is to provide a polymer obtained by polymerizing the polymerizable composition and an optically anisotropic body using the polymer. The present invention relates to a polymerizable composition which includes a compound having at least one mesogenic group and satisfying an expression represented by Expression (1), and which satisfies an expression represented by Expression (2). 0.
    Type: Application
    Filed: July 14, 2016
    Publication date: January 24, 2019
    Applicant: DIC Corporation
    Inventors: Mika Takasaki, Masahiro Horiguchi, 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: 20180327668
    Abstract: The polymerizable composition includes a compound which is reverse wavelength dispersive or low wavelength dispersive and has at least one mesogenic group, the mixture satisfying Expression (1). In the expression (1), YI represents a yellowness index of the compound and ?n represents a refractive index anisotropy at a wavelength of 550 nm in the case of being formed into a film: 0.5?YI/?n?500 Expression (1).
    Type: Application
    Filed: July 14, 2016
    Publication date: November 15, 2018
    Applicant: DIC Corporation
    Inventors: Masahiro Horiguchi, Mika Takasaki, Yasuhiro Kuwana
  • 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