Patents by Inventor Akihiro Koiso

Akihiro Koiso 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: 11261378
    Abstract: The present invention aims to provide a polymerizable compound that has high storage stability without causing crystal precipitation when added to a polymerizable composition and to provide a polymerizable composition containing the polymerizable compound. A polymer film produced by polymerization of the polymerizable composition has a low haze, high thickness uniformity, low occurrence of nonuniform orientation, high surface hardness, high adhesiveness, and good appearances and fewer orientation defects even after ultraviolet irradiation. The present invention also aims to provide a polymer produced by polymerization of the polymerizable composition and an optically anisotropic body produced from the polymer.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 1, 2022
    Assignee: DIC CORPORATION
    Inventors: Masahiro Horiguchi, Sayaka Nose, Akihiro Koiso
  • Patent number: 10919870
    Abstract: There is provided a polymerizable composition, by which discoloration or alignment defects are less likely to occur when a filmy polymer, which is obtained by adding a polymerizable compound to the polymerizable composition and polymerizing this composition, is irradiated with ultraviolet light. There are also provided a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer. The present invention provides a polymerizable low-wavelength dispersive or polymerizable reverse-wavelength dispersive compound having a partial structure represented by Formula (Z-0). Further, the present invention provides a composition containing the compound; a polymer obtained by polymerizing the composition; and an optically anisotropic body obtained by using the polymer.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: February 16, 2021
    Assignee: DIC CORPORATION
    Inventors: Masahiro Horiguchi, Yutaka Kadomoto, Akihiro Koiso, Masanao Hayashi, Yoshitaka Saitou, Yan Teng, Zhimin Li
  • Patent number: 10647662
    Abstract: In light of requests to reduce or reverse the wavelength dispersion of the birefringence of a phase-retardation film in order to increase the viewing angle of a liquid crystal display, the present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Another object of the present invention is to provide a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: May 12, 2020
    Assignee: DIC CORPORATION
    Inventors: Yutaka Kadomoto, Masahiro Horiguchi, Akihiro Koiso
  • Patent number: 10633353
    Abstract: It is an object of the present invention to provide a polymerizable compound having a good liquid crystal property, a good alignment property, sufficient solubility in solvents, high preservation stability in a solution state, and high optical stability; a composition including the polymerizable compound; a polymer produced by polymerizing the polymerizable compound, such as a resin produced using the polymerizable compound; an optically anisotropic body including the polymer; and a liquid crystal display element and an organic EL device that include the optically anisotropic body. As a result of conducting intensive studies in order to achieve the above object, the compound represented by General Formula (I) is developed.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: April 28, 2020
    Assignee: DIC CORPORATION
    Inventors: Sayaka Nose, Yuji Ohashi, Junichi Mamiya, Akihiro Koiso, Tatsufumi Yamazaki
  • Patent number: 10351643
    Abstract: An object of the invention is to provide polymerizable compounds having excellent optical characteristics and suited as materials for optically anisotropic articles, compositions containing the polymerizable compounds, polymers obtained by polymerizing the polymerizable compounds, optically anisotropic articles formed of the polymers, and liquid crystal display devices including the optically anisotropic articles.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: July 16, 2019
    Assignee: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
  • Publication number: 20180319755
    Abstract: There is provided a polymerizable composition, by which discoloration or alignment defects are less likely to occur when a filmy polymer, which is obtained by adding a polymerizable compound to the polymerizable composition and polymerizing this composition, is irradiated with ultraviolet light. There are also provided a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer. The present invention provides a polymerizable low-wavelength dispersive or polymerizable reverse-wavelength dispersive compound having a partial structure represented by Formula (Z-0). Further, the present invention provides a composition containing the compound; a polymer obtained by polymerizing the composition; and an optically anisotropic body obtained by using the polymer.
    Type: Application
    Filed: November 9, 2015
    Publication date: November 8, 2018
    Applicant: DIC CORPORATION
    Inventors: Yan Teng, Masahiro Horiguchi, Yutaka Kadomoto, Akihiro Koiso, Masanao Hayashi, Yoshitaka Saitou, Zhimin Li
  • Publication number: 20180037817
    Abstract: The polymerizable composition prevents precipitation and the like of crystals and has high storage stability. A polymer compound is added to the polymerizable composition. In a case where a film-shaped polymer obtained by polymerizing the polymerizable composition is prepared, a tilt angle formed with an air interface is small, and glances of reflected light when a circularly polarizing plate is obtained by combining the polymer with a polarizing plate are removed. In addition, there is provided a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer. The polymerizable composition includes a reverse dispersible compound represented by General Formula (I), and a compound represented by General Formula (II).
    Type: Application
    Filed: January 12, 2016
    Publication date: February 8, 2018
    Applicant: DIC Corporation
    Inventors: Yasuhiro Kuwana, Masahiro Horiguchi, Toru Ishii, Sayaka Nose, Akihiro Koiso
  • Publication number: 20180002276
    Abstract: In light of requests to reduce or reverse the wavelength dispersion of the birefringence of a phase-retardation film in order to increase the viewing angle of a liquid crystal display, the present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Another object of the present invention is to provide a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer.
    Type: Application
    Filed: January 7, 2016
    Publication date: January 4, 2018
    Applicant: DIC Corporation
    Inventors: Yutaka Kadomoto, Masahiro Horiguchi, Akihiro Koiso
  • Publication number: 20170369783
    Abstract: The present invention aims to provide a polymerizable compound that has high storage stability without causing crystal precipitation when added to a polymerizable composition and to provide a polymerizable composition containing the polymerizable compound. A polymer film produced by polymerization of the polymerizable composition has a low haze, high thickness uniformity, low occurrence of nonuniform orientation, high surface hardness, high adhesiveness, and good appearances and fewer orientation defects even after ultraviolet irradiation. The present invention also aims to provide a polymer produced by polymerization of the polymerizable composition and an optically anisotropic body produced from the polymer.
    Type: Application
    Filed: December 17, 2015
    Publication date: December 28, 2017
    Inventors: Masahiro HORIGUCHI, Sayaka NOSE, Akihiro KOISO
  • Publication number: 20170362508
    Abstract: A problem of the present invention is to provide a polymerizable compound and a polymerizable composition which cause little decrease in retardation and discoloration when a film-shaped polymer produced by polymerization is irradiated with ultraviolet/visible light for a long time at high temperature. A further problem is to provide a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body using the polymer. As a result, a compound useful as a component of a polymerizable composition was obtained. An optically anisotropic body using a polymerizable liquid crystal composition containing the compound of the present invention is useful for application to an optical film and the like.
    Type: Application
    Filed: January 14, 2016
    Publication date: December 21, 2017
    Applicant: DIC Corporation
    Inventors: Masahiro Horiguchi, Akihiro Koiso
  • Patent number: 9809668
    Abstract: It is an object of the present invention to provide a polymerizable compound suitable as a material for optically anisotropic bodies having excellent optical properties, a composition containing the polymerizable compound, a polymer obtained by polymerizing the polymerizable compound, an optically anisotropic body formed of the polymer, and a liquid crystal display device including the optically anisotropic body.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: November 7, 2017
    Assignee: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
  • Publication number: 20170260150
    Abstract: It is an object of the present invention to provide a polymerizable compound having a good liquid crystal property, a good alignment property, sufficient solubility in solvents, high preservation stability in a solution state, and high optical stability; a composition including the polymerizable compound; a polymer produced by polymerizing the polymerizable compound, such as a resin produced using the polymerizable compound; an optically anisotropic body including the polymer; and a liquid crystal display element and an organic EL device that include the optically anisotropic body. As a result of conducting intensive studies in order to achieve the above object, the compound represented by General Formula (I) is developed.
    Type: Application
    Filed: December 1, 2015
    Publication date: September 14, 2017
    Applicant: DIC Corporation
    Inventors: Sayaka Nose, Yuji Ohashi, Junichi Mamiya, Akihiro Koiso, Tatsufumi Yamazaki
  • Publication number: 20170037159
    Abstract: An object of the invention is to provide polymerizable compounds having excellent optical characteristics and suited as materials for optically anisotropic articles, compositions containing the polymerizable compounds, polymers obtained by polymerising the polymerizable compounds, optically anisotropic articles formed of the polymers, and liquid crystal display devices including the optically anisotropic articles.
    Type: Application
    Filed: November 27, 2014
    Publication date: February 9, 2017
    Applicant: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
  • Publication number: 20170029655
    Abstract: It is an object of the present invention to provide a polymerizable compound suitable as a material for optically anisotropic bodies having excellent optical properties, a composition containing the polymerizable compound, a polymer obtained by polymerizing the polymerizable compound, an optically anisotropic body formed of the polymer, and a liquid crystal display device including the optically anisotropic body.
    Type: Application
    Filed: November 27, 2014
    Publication date: February 2, 2017
    Applicant: DIC CORPORATION
    Inventors: Hiroshi HASEBE, Yoshio AOKI, Kunihiko KOTANI, Akihiro KOISO, Hidetoshi NAKATA
  • Publication number: 20170002123
    Abstract: It is an object of the present invention to provide a polymerizable compound suitable as a material for optically anisotropic bodies having excellent optical properties, a composition containing the polymerizable compound, a polymer obtained by polymerizing the polymerizable compound, an optically anisotropic body formed of the polymer, and a liquid crystal display device including the optically anisotropic body.
    Type: Application
    Filed: November 27, 2014
    Publication date: January 5, 2017
    Applicant: DIC CORPORATION
    Inventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
  • Publication number: 20070105926
    Abstract: The present invention provides a tetrazoyloxime derivative which is less likely to cause chemical injury to useful plants and is also superior in chemical efficacy to a conventional hetero ring-substituted oxime derivative. A tetrazoyloxime derivative represented by the general formula (1): X represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a methanesulfonyl group, a nitro group, a trifluoromethyl group, or an aryl group; A represents a 1-alkyltetrazoyl-5-yl group or a 5-alkyltetrazoyl-1-yl group; and Het represents a pyridyl group having a substituent or a thiazoyl group having a substituent, and a plant disease controlling agent containing the same as an active ingredient are disclosed.
    Type: Application
    Filed: December 6, 2006
    Publication date: May 10, 2007
    Applicant: NIPPON SODA CO., LTD
    Inventors: Takeo Kobori, Hitoshi Kondo, Hiroyuki Tsuboi, Kumiko Akiba, Akihiro Koiso, Tsuneyuki Otaguro, Hidetoshi Nakayama, Hiroyuki Hamano, Akira Ohno, Toru Asada
  • Patent number: 7183299
    Abstract: The present invention provides a tetrazoyloxime derivative which is less likely to cause chemical injury to useful plants and is also superior in chemical efficacy to a conventional hetero ring-substituted oxime derivative. A tetrazoyloxime derivative represented by the general formula (1): X represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a methanesulfonyl group, a nitro group, a trifluoromethyl group, or an aryl group; A represents a 1-alkyltetrazoyl-5-yl group or a 5-alkyltetrazoyl-1-yl group; and Het represents a pyridyl group having a substituent or a thiazoyl group having a substituent, and a plant disease controlling agent containing the same as an active ingredient are disclosed.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: February 27, 2007
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Takeo Kobori, Hitoshi Kondo, Hiroyuki Tsuboi, Kumiko Akiba, Akihiro Koiso, Tsuneyuki Otaguro, Hidetoshi Nakayama, Hiroyuki Hamano, Akira Ohno, Toru Asada
  • Publication number: 20050070439
    Abstract: The present invention provides a tetrazoyloxime derivative which is less likely to cause chemical injury to useful plants and is also superior in chemical efficacy to a conventional hetero ring-substituted oxime derivative. A tetrazoyloxime derivative represented by the general formula (1): X represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a methanesulfonyl group, a nitro group, a trifluoromethyl group, or an aryl group; A represents a 1-alkyltetrazoyl-5-yl group or a 5-alkyltetrazoyl-1-yl group; and Het represents a pyridyl group having a substituent or a thiazoyl group having a substituent, and a plant disease controlling agent containing the same as an active ingredient are disclosed.
    Type: Application
    Filed: August 16, 2002
    Publication date: March 31, 2005
    Applicant: Dainippon Ink And Chemicals, INC.
    Inventors: Takeo Kobori, Hitoshi Kondo, Hiroyuki Tsuboi, Kumiko Akiba, Akihiro Koiso, Tsuneyuki Otaguro, Hidetoshi Nakayama, Hiroyuki Hamano, Akira Ohno, Toru Asada
  • Patent number: 5354905
    Abstract: An N-alkoxymethyl benzamide derivative represented by Formula (I); ##STR1## (In the formula, reference X indicates a halogen atom, references Y.sub.1 and Y.sub.2 indicate hydrogen atoms or halogen atoms, and may be identical or different, and reference R indicates a lower alkyl group.) and a manufacturing method for this N-alkoxymethyl benzamide derivative in which a substituted benzamide and an .alpha.-haloacetal are reacted. Furthermore, a manufacturing method for benzamide derivatives in which the N-alkoxymethyl benzamide derivative represented by Formula (I) above and benzene or a derivative thereof are reacted, and a benzamide derivative is produced. The N-alkoxymethyl benzamide derivative of the present invention is a novel compound, and possesses utility as an intermediate in the manufacturing of oxazoline derivatives which possess insecticidal and anti-mite activity, and as a starting material for the synthesis of various organic compounds and the like.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: October 11, 1994
    Assignee: Yashima Chemical Industry Co., Ltd.
    Inventors: Yoshihiro Sato, Akihiro Koiso, Tohru Asada, Yasuhisa Miura, Yasuo Kikuchi, Yasuaki Hariya