Patents by Inventor Junichi Mamiya
Junichi Mamiya 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: 11390811Abstract: The present invention provides a liquid crystal composition, containing: one kind or two or more kinds of a first monomer having a first mesogenic skeleton, at least one polymerizable group represented by the general formula (PG1) linked to the first mesogenic skeleton, and at least one polar group linked to the mesogenic skeleton or the polymerizable group; and one kind or two or more kinds of a second monomer having a second mesogenic skeleton and a polymerizable group represented by the general formula (PG2) linked to the second mesogenic skeleton, and having a chemical structure different from that of the first monomer, in an amount of more than 0.4% by mass, which is excellent in vertical alignment, burn-in characteristics (change with time of pretilt angle), and compatibility, and provides a liquid crystal display element using the liquid crystal composition.Type: GrantFiled: June 14, 2018Date of Patent: July 19, 2022Assignee: DIC CORPORATIONInventors: Junko Yamamoto, Junichi Mamiya, Yuichi Inoue, Masaomi Kimura
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Patent number: 11312906Abstract: A problem to be solved by the present invention is to provide a liquid crystal composition excellent in vertical alignment and compatibility and to provide a liquid crystal display device produced using the same. The problem is solved by a liquid crystal composition containing one or two or more kinds of self-aligning polymerizable monomers and one or two or more kinds of polymerizable monomers (or polymerizable compounds) having a specific chemical structure, and a liquid crystal display device produced using the same, specifically a liquid crystal composition containing a polymerizable monomer represented by General Formula (I) and a spontaneously aligning monomer which has a chemical structure different from that of the polymerizable monomer represented by General Formula (I), and has a polar group, and a liquid crystal display device containing the same.Type: GrantFiled: May 17, 2018Date of Patent: April 26, 2022Assignee: DIC CORPORATIONInventors: Junichi Mamiya, Yuichi Inoue, Masaomi Kimura, Junko Yamamoto, Masanao Hayashi, Hirokazu Sugiyama
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Patent number: 11046889Abstract: The polymerizable liquid crystal compound has reverse wavelength dispersion or low wavelength dispersion and has high solubility in various solvents. The polymerizable liquid crystal compound provides an optically anisotropic body having high adhesiveness to substrates (or alignment films), by adding the polymerizable liquid crystal compound to a polymerizable composition and polymerizing the polymerizable composition using ultraviolet light. The invention provides a polymerizable composition containing the polymerizable liquid crystal compound having reverse wavelength dispersion or low wavelength dispersion, a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer.Type: GrantFiled: December 1, 2016Date of Patent: June 29, 2021Assignee: DIC CORPORATIONInventors: Yoshitaka Saito, Tatsufumi Yamazaki, Masahiro Horiguchi, Junichi Mamiya, Toru Tsuruta
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Publication number: 20210171831Abstract: Provided are an alignment aid that sufficiently exerts an alignment control force causing liquid crystal molecules to be vertically aligned and can reduce a change in pretilt angle over time, a liquid crystal composition containing the alignment aid, and a liquid crystal display device. The alignment aid of the present invention has the function of causing the liquid crystal molecules to be aligned spontaneously. In the light absorption spectrum of the alignment aid, the longest wavelength at which the absorbance is 0.5 is 330 nm or shorter. Preferably, the light absorption spectrum is measured on a solution prepared by dissolving the alignment aid in tetrahydrofuran at a concentration of 1000 ppm.Type: ApplicationFiled: June 20, 2019Publication date: June 10, 2021Applicant: DIC CorporationInventors: Junko Yamamoto, Yuichi Inoue, Junichi Mamiya, Masaomi Kimura
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Patent number: 10968189Abstract: The present invention provides a novel method for producing a 2-hydrazinobenzothiazole derivative. The present invention also provides a method for producing a compound by using the 2-hydrazinobenzothiazole derivative obtained by the production method, and a composition that contains the compound. The present invention also provides a polymerizable composition that is useful in producing film-shaped polymers and contains the compound obtained by the production method. The invention of the present application provides a method for producing a compound represented by general formula (I-C), the method including a step of reacting a compound represented by general formula (I-B) with a compound represented by general formula (I-A) in the presence of at least one compound selected from the group consisting of metal amides, metal hydrides, metal alkoxides, and organic alkali metals. A compound derived from the compound produced by the production method, and a composition that contains the compound are also provided.Type: GrantFiled: March 16, 2017Date of Patent: April 6, 2021Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Junichi Mamiya
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Patent number: 10927087Abstract: The polymerizable compound has a hydrazone moiety. The present invention also provides a polymerizable composition in which discoloration and reduction of aligning property do not easily occur. Furthermore, the present invention provides a polymer obtained by polymerizing a polymerizable composition containing a compound obtained by the production method and an optically anisotropic body using the polymer. The present invention provides a method for producing a polymerizable compound including a step of reacting a compound represented by General Formula (I-B-a) with a compound represented by General Formula (I-B-b) to obtain a compound represented by General Formula (I-C), and provides a composition which contains a compound obtained by this production method.Type: GrantFiled: November 29, 2016Date of Patent: February 23, 2021Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Junichi Mamiya
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Publication number: 20200224098Abstract: A problem to be solved by the present invention is to provide a liquid crystal composition excellent in vertical alignment and compatibility and to provide a liquid crystal display device produced using the same. The problem is solved by a liquid crystal composition containing one or two or more kinds of self-aligning polymerizable monomers and one or two or more kinds of polymerizable monomers (or polymerizable compounds) having a specific chemical structure, and a liquid crystal display device produced using the same, specifically a liquid crystal composition containing a polymerizable monomer represented by General Formula (I) and a spontaneously aligning monomer which has a chemical structure different from that of the polymerizable monomer represented by General Formula (I), and has a polar group, and a liquid crystal display device containing the same.Type: ApplicationFiled: May 17, 2018Publication date: July 16, 2020Applicant: DIC CorporationInventors: Junichi Mamiya, Yuichi Inoue, Masaomi Kimura, Junko Yamamoto, Masanao Hayashi, Hirokazu Sugiyama
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Publication number: 20200208054Abstract: The present invention provides a liquid crystal composition, containing: one kind or two or more kinds of a first monomer having a first mesogenic skeleton, at least one polymerizable group represented by the general formula (PG1) linked to the first mesogenic skeleton, and at least one polar group linked to the mesogenic skeleton or the polymerizable group; and one kind or two or more kinds of a second monomer having a second mesogenic skeleton and a polymerizable group represented by the general formula (PG2) linked to the second mesogenic skeleton, and having a chemical structure different from that of the first monomer, in an amount of more than 0.4% by mass, which is excellent in vertical alignment, burn-in characteristics (change with time of pretilt angle), and compatibility, and provides a liquid crystal display element using the liquid crystal composition.Type: ApplicationFiled: June 14, 2018Publication date: July 2, 2020Applicant: DIC CORPORATION (TOKYO)Inventors: Junko Yamamoto, Junichi Mamiya, Yuichi Inoue, Masaomi Kimura
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Publication number: 20200165215Abstract: The present invention provides a novel method for producing a 2-hydrazinobenzothiazole derivative. The present invention also provides a method for producing a compound by using the 2-hydrazinobenzothiazole derivative obtained by the production method, and a composition that contains the compound. The present invention also provides a polymerizable composition that is useful in producing film-shaped polymers and contains the compound obtained by the production method. The invention of the present application provides a method for producing a compound represented by general formula (I-C), the method including a step of reacting a compound represented by general formula (I-B) with a compound represented by general formula (I-A) in the presence of at least one compound selected from the group consisting of metal amides, metal hydrides, metal alkoxides, and organic alkali metals. A compound derived from the compound produced by the production method, and a composition that contains the compound are also provided.Type: ApplicationFiled: March 16, 2017Publication date: May 28, 2020Applicant: DIC CorporationInventors: Masahiro Horiguchi, Junichi Mamiya
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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: 10428032Abstract: The present invention provides a compound represented by the general formula (I), and a polymerizable composition containing the compound. When the polymerizable composition containing the compound represented by the formula (I) is used to form a filmy product, the resulting filmy product exhibits less change over time in phase difference and reverse wavelength dispersion and when the filmy polymer is irradiated with UV light, peeling from a substrate is unlikely to be caused. Further, the invention provides a polymer obtained through polymerization of the polymerizable composition and an optically anisotropic body obtained using the polymer.Type: GrantFiled: August 25, 2016Date of Patent: October 1, 2019Assignee: DIC CORPORATIONInventors: Masahiro Horiguchi, Junichi Mamiya, Yoshio Aoki
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Publication number: 20180362847Abstract: The polymerizable liquid crystal compound has reverse wavelength dispersion or low wavelength dispersion and has high solubility in various solvents. The polymerizable liquid crystal compound provides an optically anisotropic body having high adhesiveness to substrates (or alignment films), by adding the polymerizable liquid crystal compound to a polymerizable composition and polymerizing the polymerizable composition using ultraviolet light. The invention provides a polymerizable composition containing the polymerizable liquid crystal compound having reverse wavelength dispersion or low wavelength dispersion, a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer.Type: ApplicationFiled: December 1, 2016Publication date: December 20, 2018Applicant: DIC CorporationInventors: Yoshitaka Saito, Tatsufumi Yamazaki, Masahiro Horiguchi, Junichi Mamiya, Toru Tsuruta
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Publication number: 20180354922Abstract: The polymerizable compound has a hydrazone moiety. The present invention also provides a polymerizable composition in which discoloration and reduction of aligning property do not easily occur. Furthermore, the present invention provides a polymer obtained by polymerizing a polymerizable composition containing a compound obtained by the production method and an optically anisotropic body using the polymer. The present invention provides a method for producing a polymerizable compound including a step of reacting a compound represented by General Formula (I-B-a) with a compound represented by General Formula (I-B-b) to obtain a compound represented by General Formula (I-C), and provides a composition which contains a compound obtained by this production method.Type: ApplicationFiled: November 29, 2016Publication date: December 13, 2018Applicant: DIC CorporationInventors: Masahiro Horiguchi, Junichi Mamiya
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Publication number: 20180312481Abstract: The present invention provides a compound represented by the general formula (I), and a polymerizable composition containing the compound. When the polymerizable composition containing the compound represented by the formula (I) is used to form a filmy product, the resulting filmy product exhibits less change over time in phase difference and reverse wavelength dispersion and when the filmy polymer is irradiated with UV light, peeling from a substrate is unlikely to be caused. Further, the invention provides a polymer obtained through polymerization of the polymerizable composition and an optically anisotropic body obtained using the polymer.Type: ApplicationFiled: August 25, 2016Publication date: November 1, 2018Applicant: DIC CorporationInventors: Masahiro Horiguchi, Junichi Mamiya, Yoshio Aoki
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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