Patents by Inventor Michiaki Fuji
Michiaki Fuji 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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Publication number: 20230024196Abstract: A copolymerized polycarbonate resin having, at least, a constituent unit (A) and a constituent unit (B). The constituent unit (A) is derived from a dihydroxy compound. The carbonate constituent unit (B) is derived from a polyoxyalkylene glycol. A weight ratio of the constituent unit (B) derived from a polyoxyalkylene glycol to a weight of the copolymerized polycarbonate resin is preferably more than 20 wt % and 99 wt % or less.Type: ApplicationFiled: August 30, 2022Publication date: January 26, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Michiaki FUJI, Atsushi FUJIMURA, Kazuki FUKUMOTO, Ryuichi SHIMOGAWA, Hikaru KONDO
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Patent number: 10632696Abstract: Disclosed herein is a process for producing a transparent film, including the step of stretching a film in at least one direction under a condition(s) that satisfies an expression (5): 200%/min?[stretching speed(strain rate)]?1,200%/min??(5), wherein the film comprises a polycarbonate resin containing at least a constitutional unit derived from a dihydroxy compound (A) that has a bonded structure represented by a structural formula (1): in which no hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).Type: GrantFiled: May 5, 2017Date of Patent: April 28, 2020Assignees: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko Tanaka, Michiaki Fuji, Nao Murakami, Takashi Shimizu
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Patent number: 10155846Abstract: The present invention relates to a polycarbonate resin containing, in the molecule, a structure represented by the following formula (1): wherein X has a structure represented by any one of the following formula (2) to (4): wherein each of R1 to R4 independently represents a hydrogen atom or an organic group having a carbon number of 1 to 30; the organic group may have an arbitrary substituent, and any two or more members of R1 to R4 may combine with each other to form a ring, which is excellent in heat resistance, transparency, light resistance, weather resistance and mechanical strength.Type: GrantFiled: June 19, 2017Date of Patent: December 18, 2018Assignee: Mitsubishi Chemical CorporationInventors: Michiaki Fuji, Kiminori Kawakami, Kazuki Fukumoto, Hisatoshi Uehara, Kenichi Satake, Tomoko Maeda
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Publication number: 20170283550Abstract: The present invention relates to a polycarbonate resin containing, in the molecule, a structure represented by the following formula (1): wherein X has a structure represented by any one of the following formulae (2) to (4): wherein each of R1 to R4 independently represents a hydrogen atom or an organic group having a carbon number of 1 to 30; the organic group may have an arbitrary substituent, and any two or more members of R1 to R4 may combine with each other to form a ring, which is excellent in heat resistance, transparency, light resistance, weather resistance and mechanical strength.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Applicant: Mitsubishi Chemical CorporationInventors: Michiaki FUJI, Kiminori KAWAKAMI, Kazuki FUKUMOTO, Hisatoshi UEHARA, Kenichi SATAKE, Tomoko MAEDA
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Publication number: 20170239899Abstract: A polycarbonate resin film of the present invention is formed from a polycarbonate resin which contains at least a constitutional unit derived from a dihydroxy compound having a bonded structure represented by the following structural formula (1) and satisfies the following expression (2) when subjected to a tensile test at a standard stretching temperature for the polycarbonate resin and at a pulling speed (strain rate) of 1,000%/min. [Chem. 1] ?CH2—O???(1) (No hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).) 0.Type: ApplicationFiled: May 5, 2017Publication date: August 24, 2017Applicants: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko TANAKA, Michiaki FUJI, Nao MURAKAMI, Takashi SHIMIZU
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Patent number: 9709701Abstract: A polycarbonate resin film of the present invention is formed from a polycarbonate resin which contains at least a constitutional unit derived from a dihydroxy compound having a bonded structure represented by the following structural formula (1) and satisfies the following expression (2) when subjected to a tensile test at a standard stretching temperature for the polycarbonate resin and at a pulling speed (strain rate) of 1,000%/min. [Chem. 1] CH2—O??(1) (No hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).) 0.9?[(lower yield stress in tension)/(upper yield stress in tension)]?1??(2).Type: GrantFiled: May 18, 2012Date of Patent: July 18, 2017Assignees: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko Tanaka, Michiaki Fuji, Nao Murakami, Takashi Shimizu
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Patent number: 9678245Abstract: A polycarbonate resin film of the present invention is formed from a polycarbonate resin which contains at least a constitutional unit derived from a dihydroxy compound having a bonded structure represented by the following structural formula (1) and satisfies the following expression (2) when subjected to a tensile test at a standard stretching temperature for the polycarbonate resin and at a pulling speed (strain rate) of 1,000%/min. [Chem. 1] CH2—O??(1) (No hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).) 0.9?[(lower yield stress in tension)/(upper yield stress in tension)]?1??(2).Type: GrantFiled: May 18, 2012Date of Patent: June 13, 2017Assignees: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko Tanaka, Michiaki Fuji, Nao Murakami, Takashi Shimizu
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Publication number: 20160264725Abstract: The invention is to provide polycarbonate resins having excellent light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength and to provide processes for efficiently and stably producing a polycarbonate resin which stably shows those performances. The invention includes: polycarbonate resins which at least contain structural units derived from a dihydroxy compound having the portion represented by formula (1) as part of the structure thereof and which have specific properties; and processes for producing the polycarbonate resins, where the case where the portion represented by formula (1) is part of —CH2—O—H is excluded.Type: ApplicationFiled: May 25, 2016Publication date: September 15, 2016Applicant: Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Michiaki FUJI, Masanori YAMAMOTO
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Patent number: 9382378Abstract: The invention is to provide polycarbonate resins having excellent light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength and to provide processes for efficiently and stably producing a polycarbonate resin which stably shows those performances. The invention includes: polycarbonate resins which at least contain structural units derived from a dihydroxy compound having the portion represented by formula (1) as part of the structure thereof and which have specific properties; and processes for producing the polycarbonate resins, CH2—O??(1) where the case where the portion represented by formula (1) is part of —CH2—O—H is excluded.Type: GrantFiled: January 8, 2014Date of Patent: July 5, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo Namiki, Michiaki Fuji, Masanori Yamamoto
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Patent number: 9193823Abstract: The problem to be solved by the present invention is to provide a polycarbonate copolymer containing a plant-derived raw material, which is excellent in the mechanical strength and heat-resistant and assured of small refractive index, large Abbe number, small birefringence and excellent transparency. The present invention provides a polycarbonate copolymer containing a constitutional unit derived from a dihydroxy compound represented by the following formula (1) and a constitutional unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more and the 5% thermal reduction temperature is 340° C. or more; and a method of producing this polycarbonate copolymer by reacting a dihydroxy compound represented by the following formula (1) and an alicyclic hydroxy compound with a carbonic acid diester in the presence of a polymerization catalyst.Type: GrantFiled: May 1, 2014Date of Patent: November 24, 2015Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Michiaki Fuji, Minako Akita, Tomohiko Tanaka
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Patent number: 9120910Abstract: The invention provides polycarbonate resins which are excellent in terms of light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength. The invention relates to a polycarbonate resin composition containing: a polycarbonate resin at least containing structural units derived from a dihydroxy compound having the portion represented by the following formula (1) as part of the structure thereof; and a bluing agent. The invention further relates to a polycarbonate resin composition including: a polycarbonate resin (A) containing structural units derived from a dihydroxy compound represented by the following formula (2) as part of the structure thereof; and a bluing agent. CH2—O??(1) The case where the portion represented by the general formula (1) constitutes —CH2—O—H is excluded.Type: GrantFiled: December 26, 2012Date of Patent: September 1, 2015Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi Yokogi, Michiaki Fuji, Masanori Yamamoto
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Patent number: 9051420Abstract: The invention is to provide polycarbonate resins having excellent light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength and to provide processes for efficiently and stably producing a polycarbonate resin which stably shows those performances. The invention includes: polycarbonate resins which at least contain structural units derived from a dihydroxy compound having the portion represented by the following general formula (1) as part of the structure thereof and which have specific properties; and processes for producing the polycarbonate resins. [Chem. 1] CH2—O??(1) (The case where the portion represented by general formula (1) is part of —CH2—O—H is excluded.Type: GrantFiled: May 24, 2012Date of Patent: June 9, 2015Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo Namiki, Michiaki Fuji, Masanori Yamamoto
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Patent number: 8865855Abstract: The problem to be solved by the present invention is to provide a polycarbonate copolymer containing a plant-derived raw material, which is excellent in the mechanical strength and heat-resistant and assured of small refractive index, large Abbe number, small birefringence and excellent transparency. The present invention provides a polycarbonate copolymer containing a constitutional unit derived from a dihydroxy compound represented by the following formula (1) and a constitutional unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more and the 5% thermal reduction temperature is 340° C. or more; and a method of producing this polycarbonate copolymer by reacting a dihydroxy compound represented by the following formula (1) and an alicyclic hydroxy compound with a carbonic acid diester in the presence of a polymerization catalyst.Type: GrantFiled: June 14, 2007Date of Patent: October 21, 2014Assignee: Mitsubishi Chemical CorporationInventors: Michiaki Fuji, Minako Akita, Tomohiko Tanaka
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Publication number: 20140296473Abstract: The problem to be solved by the present invention is to provide a polycarbonate copolymer containing a plant-derived raw material, which is excellent in the mechanical strength and heat-resistant and assured of small refractive index, large Abbe number, small birefringence and excellent transparency. The present invention provides a polycarbonate copolymer containing a constitutional unit derived from a dihydroxy compound represented by the following formula (1) and a constitutional unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more and the 5% thermal reduction temperature is 340° C. or more; and a method of producing this polycarbonate copolymer by reacting a dihydroxy compound represented by the following formula (1) and an alicyclic hydroxy compound with a carbonic acid diester in the presence of a polymerization catalyst.Type: ApplicationFiled: May 1, 2014Publication date: October 2, 2014Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Michiaki FUJI, Minako AKITA, Tomohiko TANAKA
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Publication number: 20140121348Abstract: The invention is to provide polycarbonate resins having excellent light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength and to provide processes for efficiently and stably producing a polycarbonate resin which stably shows those performances. The invention includes: polycarbonate resins which at least contain structural units derived from a dihydroxy compound having the portion represented by formula (1) as part of the structure thereof and which have specific properties; and processes for producing the polycarbonate resins, ?CH2—O???(1) where the case where the portion represented by formula (1) is part of —CH2—O—H is excluded.Type: ApplicationFiled: January 8, 2014Publication date: May 1, 2014Inventors: Shingo Namiki, Michiaki Fuji, Masanori Yamamoto
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Patent number: 8546515Abstract: A subject for the invention relates to processes for producing a polycarbonate containing a plant-derived starting material and to molded articles thereof, the polycarbonate having excellent mechanical strength, heat resistance, a low refractive index, a large Abbe number, low birefringence, and excellent transparency. The invention relates to a process for producing a polycarbonate which includes a step in which one or more dihydroxy compounds including a dihydroxy compound having at least one linking group —CH2—O— in the molecule thereof are reacted with a carbonic acid diester in the presence of a polymerization catalyst, wherein the dihydroxy compound having at least one linking group —CH2—O— in the molecule thereof has a formic acid content lower than 20 ppm.Type: GrantFiled: December 10, 2008Date of Patent: October 1, 2013Assignee: Mitsubishi Chemical CorporationInventors: Michiaki Fuji, Tomohiko Tanaka, Minako Akita
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Patent number: 8481625Abstract: The present invention relates to a polycarbonate resin composition (X) which includes a polycarbonate resin (A) and an aromatic polycarbonate resin (B), the polycarbonate resin (A) including a constitutional unit derived from a dihydroxy compound (a) having, as part of the structure thereof, a site represented by the following formula (1) and a constitutional unit derived from a dihydroxy compound (b) of an aliphatic hydrocarbon, wherein the proportion of the constitutional unit derived from the dihydroxy compound (b) of an aliphatic hydrocarbon based on all constitutional units each derived from a dihydroxy compound in the polycarbonate resin (A) is 45% by mole or more. (The case where the site represented by the formula (1) is part of —CH2—O—H is omitted.Type: GrantFiled: June 6, 2012Date of Patent: July 9, 2013Assignees: Mitsubishi Chemical Corporation, Mitsubishi Plastics, Inc.Inventors: Masashi Yokogi, Michiaki Fuji, Haruo Sasaki, Kazuya Tanaka, Kouichirou Taniguchi
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Patent number: 8445624Abstract: A subject for the invention is to provide a polycarbonate having excellent mechanical strength, heat resistance, a low refractive index, a large Abbe number, reduced birefringence, and excellent transparency. The invention relates to a polycarbonate characterized by being obtained by subjecting one or more dihydroxy compounds including a dihydroxy compound having at least one linking group —CH2—O— in the molecule thereof to melt polycondensation with a carbonic acid diester, and by having a reduced viscosity of from 0.40 dL/g to 1.70 dL/g and a formic acid content lower than 5 ppm by weight.Type: GrantFiled: December 10, 2008Date of Patent: May 21, 2013Assignee: Mitsubishi Chemical CorporationInventors: Michiaki Fuji, Shingo Namiki, Masaki Yamamoto
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Publication number: 20130116365Abstract: The invention provides polycarbonate resins which are excellent in terms of light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength. The invention relates to a polycarbonate resin composition containing: a polycarbonate resin at least containing structural units derived from a dihydroxy compound having the portion represented by the following formula (1) as part of the structure thereof; and a bluing agent. The invention further relates to a polycarbonate resin composition including: a polycarbonate resin (A) containing structural units derived from a dihydroxy compound represented by the following formula (2) as part of the structure thereof; and a bluing agent. ?CH2—O???(1) The case where the portion represented by the general formula (1) constitutes —CH2—O—H is excluded.Type: ApplicationFiled: December 26, 2012Publication date: May 9, 2013Inventors: Masashi YOKOGI, Michiaki Fuji, Masanori Yamamoto
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Publication number: 20120245266Abstract: The present invention relates to a polycarbonate resin composition (X) which includes a polycarbonate resin (A) and an aromatic polycarbonate resin (B), the polycarbonate resin (A) including a constitutional unit derived from a dihydroxy compound (a) having, as part of the structure thereof, a site represented by the following formula (1) and a constitutional unit derived from a dihydroxy compound (b) of an aliphatic hydrocarbon, wherein the proportion of the constitutional unit derived from the dihydroxy compound (b) of an aliphatic hydrocarbon based on all constitutional units each derived from a dihydroxy compound in the polycarbonate resin (A) is 45% by mole or more. (The case where the site represented by the formula (1) is part of —CH2—O—H is omitted.Type: ApplicationFiled: June 6, 2012Publication date: September 27, 2012Applicants: MITSUBISHI PLASTICS, INC., MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi Yokogi, Michiaki Fuji, Haruo Sasaki, Kazuya Tanaka, Kouichirou Taniguchi