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).
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Patent number: 11261378Abstract: 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: GrantFiled: December 17, 2015Date of Patent: March 1, 2022Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Sayaka Nose, Akihiro Koiso
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Patent number: 10919870Abstract: 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: GrantFiled: November 9, 2015Date of Patent: February 16, 2021Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Yutaka Kadomoto, Akihiro Koiso, Masanao Hayashi, Yoshitaka Saitou, Yan Teng, Zhimin Li
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Patent number: 10647662Abstract: 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: GrantFiled: January 7, 2016Date of Patent: May 12, 2020Assignee: DIC CORPORATIONInventors: Yutaka Kadomoto, Masahiro Horiguchi, Akihiro Koiso
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Patent number: 10633353Abstract: 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: GrantFiled: December 1, 2015Date of Patent: April 28, 2020Assignee: DIC CORPORATIONInventors: Sayaka Nose, Yuji Ohashi, Junichi Mamiya, Akihiro Koiso, Tatsufumi Yamazaki
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Patent number: 10351643Abstract: 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: GrantFiled: November 27, 2014Date of Patent: July 16, 2019Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
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Publication number: 20180319755Abstract: 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: ApplicationFiled: November 9, 2015Publication date: November 8, 2018Applicant: DIC CORPORATIONInventors: Yan Teng, Masahiro Horiguchi, Yutaka Kadomoto, Akihiro Koiso, Masanao Hayashi, Yoshitaka Saitou, Zhimin Li
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Publication number: 20180037817Abstract: 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: ApplicationFiled: January 12, 2016Publication date: February 8, 2018Applicant: DIC CorporationInventors: Yasuhiro Kuwana, Masahiro Horiguchi, Toru Ishii, Sayaka Nose, Akihiro Koiso
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Publication number: 20180002276Abstract: 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: ApplicationFiled: January 7, 2016Publication date: January 4, 2018Applicant: DIC CorporationInventors: Yutaka Kadomoto, Masahiro Horiguchi, Akihiro Koiso
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Publication number: 20170369783Abstract: 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: ApplicationFiled: December 17, 2015Publication date: December 28, 2017Inventors: Masahiro HORIGUCHI, Sayaka NOSE, Akihiro KOISO
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Publication number: 20170362508Abstract: 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: ApplicationFiled: January 14, 2016Publication date: December 21, 2017Applicant: DIC CorporationInventors: Masahiro Horiguchi, Akihiro Koiso
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Patent number: 9809668Abstract: 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: GrantFiled: November 27, 2014Date of Patent: November 7, 2017Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
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Publication number: 20170260150Abstract: 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: ApplicationFiled: December 1, 2015Publication date: September 14, 2017Applicant: DIC CorporationInventors: Sayaka Nose, Yuji Ohashi, Junichi Mamiya, Akihiro Koiso, Tatsufumi Yamazaki
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Publication number: 20170037159Abstract: 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: ApplicationFiled: November 27, 2014Publication date: February 9, 2017Applicant: DIC CORPORATIONInventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
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Publication number: 20170029655Abstract: 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: ApplicationFiled: November 27, 2014Publication date: February 2, 2017Applicant: DIC CORPORATIONInventors: Hiroshi HASEBE, Yoshio AOKI, Kunihiko KOTANI, Akihiro KOISO, Hidetoshi NAKATA
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Publication number: 20170002123Abstract: 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: ApplicationFiled: November 27, 2014Publication date: January 5, 2017Applicant: DIC CORPORATIONInventors: Hiroshi Hasebe, Yoshio Aoki, Kunihiko Kotani, Akihiro Koiso, Hidetoshi Nakata
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Publication number: 20070105926Abstract: 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: ApplicationFiled: December 6, 2006Publication date: May 10, 2007Applicant: NIPPON SODA CO., LTDInventors: Takeo Kobori, Hitoshi Kondo, Hiroyuki Tsuboi, Kumiko Akiba, Akihiro Koiso, Tsuneyuki Otaguro, Hidetoshi Nakayama, Hiroyuki Hamano, Akira Ohno, Toru Asada
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Patent number: 7183299Abstract: 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: GrantFiled: August 16, 2002Date of Patent: February 27, 2007Assignee: 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
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Publication number: 20050070439Abstract: 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: ApplicationFiled: August 16, 2002Publication date: March 31, 2005Applicant: 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
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Patent number: 5354905Abstract: 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: GrantFiled: October 20, 1993Date of Patent: October 11, 1994Assignee: Yashima Chemical Industry Co., Ltd.Inventors: Yoshihiro Sato, Akihiro Koiso, Tohru Asada, Yasuhisa Miura, Yasuo Kikuchi, Yasuaki Hariya