Patents by Inventor Yuuichi HIRAMI
Yuuichi HIRAMI 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: 11873370Abstract: A polycarbonate resin composition may include a first polycarbonate resin and a second polycarbonate resin, which a molded article may include, and a multilayer body may have a resin layer A including the polycarbonate resin composition and a resin layer B including a resin different from the resin layer A. The first polycarbonate resin may include 40% by weight or more of a structural unit of formula (1) The second polycarbonate resin may include less than 40% by weight of the structural unit of formula (1). The weight ratio of the first polycarbonate resin to the second polycarbonate resin, the first polycarbonate resin/the second polycarbonate resin, may be in a range of from 55/45 to 99/1. The polycarbonate resin composition may have two or more glass transition temperatures.Type: GrantFiled: June 10, 2019Date of Patent: January 16, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo Namiki, Yuuichi Hirami, Tomoaki Kanemasa, Taiki Shimada, Masato Ando, Akira Kosuge, Shigeki Ohta, Yuuichirou Kutsunugi, Asami Kakiuchi
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Publication number: 20220081510Abstract: A thermoplastic resin may have a structural unit of formula (1): wherein A1 to A8 are each independently ?CH— or ?N—, and at least one of A1 to A8 is ?N—. R1 to R8 are each independently a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, or the like, and at least two adjacent groups out of R1 to R8 may be bonded to each other to form a ring. R9 and R10 are each independently a direct bond or an optionally substituted alkylene group having 1 to 20 carbon atoms. X is an oxygen atom, a carbonyl group, or an optionally substituted amino group. And n is an integer of 0 to 5.Type: ApplicationFiled: November 23, 2021Publication date: March 17, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo NAMIKI, Yuuichi HIRAMI, Koji NAKAMURA, Hiroyuki HAYASHI, Tomoko MAEDA, Kenichi SATAKE
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Publication number: 20210253788Abstract: A polycarbonate resin composition may include a first polycarbonate resin and a second polycarbonate resin, which a molded article may include, and a multilayer body may have a resin layer A including the polycarbonate resin composition and a resin layer B including a resin different from the resin layer A. The first polycarbonate resin may include 40% by weight or more of a structural unit of formula (1) The second polycarbonate resin may include less than 40% by weight of the structural unit of formula (1). The weight ratio of the first polycarbonate resin to the second polycarbonate resin, the first polycarbonate resin/the second polycarbonate resin, may be in a range of from 55/45 to 99/1. The polycarbonate resin composition may have two or more glass transition temperatures.Type: ApplicationFiled: June 10, 2019Publication date: August 19, 2021Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo NAMIKI, Yuuichi HIRAMI, Tomoaki KANEMASA, Taiki SHIMADA, Masato ANDO, Akira KOSUGE, Shigeki OHTA, Yuuichirou KUTSUNUGI, Asami KAKIUCHI
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Patent number: 10754065Abstract: An object of the present invention is to provide a retardation film excellent in various properties such as optical properties, heat resistance, mechanical properties, and reliability. The present invention relates to a retardation film containing a thermoplastic resin and composed of a single layer, in which the retardation film has a value of wavelength dispersion that is a ratio of retardations at a wavelength of 450 nm and at a wavelength of 550 nm being 0.75 or more and 0.92 or less; a birefringence at a wavelength of 550 nm and the wavelength dispersion satisfy a relationship of ?n?0.0140×(R450/R550)?0.0082; and a photoelastic coefficient is 25×10?12 Pa?1 or less.Type: GrantFiled: October 14, 2016Date of Patent: August 25, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Patent number: 10732323Abstract: The retardation film of the present invention contains a resin having positive refractive index anisotropy and containing at least one bonding group of a carbonate bond and an ester bond and one or more structural units selected from the group consisting of a structural unit represented by the general formula (1) and a structural unit represented by the general formula (2), in which the value of wavelength dispersion (R450/R550) as a ratio of retardation R450 at a wavelength of 450 nm to retardation R550 at a wavelength of 550 nm is more than 0.5 and less than 1.0: (in formula (1) and formula (2), definitions of R1 to R9 are the same as in the description).Type: GrantFiled: October 14, 2016Date of Patent: August 4, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Patent number: 10670773Abstract: The retardation film of the present invention contains a thermoplastic resin and is constituted of a single layer. A value of wavelength dispersion (R450/R550) that is a ratio of a retardation R450 at a wavelength of 450 nm and a retardation R550 at a wavelength of 550 nm is 0.70 or more and 0.85 or less; and a photoelastic coefficient is 14×10?12 Pa?1 or less.Type: GrantFiled: October 14, 2016Date of Patent: June 2, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Publication number: 20190079231Abstract: There is provided an optical laminate that has a conductive layer directly formed on a retardation layer, is extremely thin and has an excellent antireflection function, and further, can realize excellent display characteristics even when it is applied to a bent portion of an image display apparatus. An optical laminate according to an embodiment of the present invention includes: a polarizer; a retardation layer; and a conductive layer, which is directly formed on the retardation layer. The retardation layer has an in-plane retardation Re(550) being from 100 nm to 180 nm and satisfying a relationship of Re(450)<Re(550)<Re(650), and has a glass transition temperature (Tg) of 150° C. or more and an absolute value of a photoelastic coefficient of 20×10?12 (m2/N) or less. An angle formed between a slow axis of the retardation layer and an absorption axis of the polarizer is from 35° to 55°.Type: ApplicationFiled: January 31, 2017Publication date: March 14, 2019Applicants: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Hiroshi Sumimura, Takashi Shimizu, Shingo Namiki, Yuuichi Hirami
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Patent number: 10081707Abstract: The object of the present invention is to provide a polycarbonate resin which is excellent in various properties, such as heat resistance, optical properties, melt processability, etc., and an optical film composed of the same and the present invention relates to a polycarbonate resin containing at least a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2): wherein in the formula (1), R1 to R6 each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group, an alkoxy group having 1 to 12 carbon atoms, or a halogen atom.Type: GrantFiled: March 31, 2017Date of Patent: September 25, 2018Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo Namiki, Yuuichi Hirami
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Publication number: 20170204220Abstract: The object of the present invention is to provide a polycarbonate resin which is excellent in various properties, such as heat resistance, optical properties, melt processability, etc., and an optical film composed of the same and the present invention relates to a polycarbonate resin containing at least a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2): wherein in the formula (1), R1 to R6 each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group, an alkoxy group having 1 to 12 carbon atoms, or a halogen atom.Type: ApplicationFiled: March 31, 2017Publication date: July 20, 2017Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo NAMIKI, Yuuichi HIRAMI
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Publication number: 20170031060Abstract: The retardation film of the present invention contains a resin having positive refractive index anisotropy and containing at least one bonding group of a carbonate bond and an ester bond and one or more structural units selected from the group consisting of a structural unit represented by the general formula (1) and a structural unit represented by the general formula (2), in which the value of wavelength dispersion (R450/R550) as a ratio of retardation R450 at a wavelength of 450 nm to retardation R550 at a wavelength of 550 nm is more than 0.5 and less than 1.0: (in formula (1) and formula (2), definitions of R1 to R9 are the same as in the description).Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Applicants: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Yuuichi HIRAMI, Hisatoshi UEHARA, Hiroyuki HAYASHI, Takashi SHIMIZU, Hiroshi SUMIMURA, Nao MURAKAMI
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Publication number: 20170031061Abstract: An object of the present invention is to provide a retardation film excellent in various properties such as optical properties, heat resistance, mechanical properties, and reliability. The present invention relates to a retardation film containing a thermoplastic resin and composed of a single layer, in which the retardation film has a value of wavelength dispersion that is a ratio of retardations at a wavelength of 450 nm and at a wavelength of 550 nm being 0.75 or more and 0.92 or less; a birefringence at a wavelength of 550 nm and the wavelength dispersion satisfy a relationship of ?n?0.0140×(R450/R550)?0.0082; and a photoelastic coefficient is 25×10?12 Pa?1 or less.Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Applicants: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Yuuichi HIRAMI, Hisatoshi UEHARA, Hiroyuki HAYASHI, Takashi SHIMIZU, Hiroshi SUMIMURA, Nao MURAKAMI
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Publication number: 20170031062Abstract: The retardation film of the present invention contains a thermoplastic resin and is constituted of a single layer. A value of wavelength dispersion (R450/R550) that is a ratio of a retardation R450 at a wavelength of 450 nm and a retardation R550 at a wavelength of 550 nm is 0.70 or more and 0.85 or less; and a photoelastic coefficient is 14×10?12 Pa?1 or less.Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Applicants: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Yuuichi HIRAMI, Histatoshi UEHARA, Hiroyuki HAYASHI, Takashi SHIMIZU, Hiroshi SUMIMURA, Nao MURAKAMI
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Patent number: 9518150Abstract: The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550?1.0.Type: GrantFiled: April 14, 2015Date of Patent: December 13, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Hisatoshi Uehara, Hiroyuki Hayashi, Naoko Sumitani, Haruhiko Kusaka, Shingo Namiki, Yuuichi Hirami
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Publication number: 20150247002Abstract: The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550?1.0.Type: ApplicationFiled: April 14, 2015Publication date: September 3, 2015Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hisatoshi UEHARA, Hiroyuki HAYASHI, Naoko SUMITANI, Haruhiko KUSAKA, Shingo NAMIKI, Yuuichi HIRAMI
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Publication number: 20140285888Abstract: A retardation film insusceptible to color dropout or color shift even under environment of severe temperature or humidity conditions and capable of being produced by a melt film-forming method. The retardation film is obtained by molding at least one polymer selected from polycarbonate and polyester carbonate each having a glass transition temperature of 110 to 180° C. and satisfies the relationships of the following formulae (A) and (B): 0.7<R1(450)/R1(550)<1??Formula (A): |R2(450)/R2(550)?R1(450)/R1(550)|<0.020.Type: ApplicationFiled: March 14, 2014Publication date: September 25, 2014Applicants: NITTO DENKO CORPORATION, MITSUBISHI CHEMICAL CORPORATIONInventors: Tomohiko TANAKA, Masashi YOKOGI, Shingo NAMIKI, Yuuichi HIRAMI, Masanori YAMAMOTO, Nao MURAKAMI, Toshiyuki IIDA, Takashi SHIMIZU