Patents by Inventor Masashi Yokogi
Masashi Yokogi 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: 20220195114Abstract: A formed product produced by using a thermoplastic resin composition comprising a polycarbonate resin with a repeating unit (A) represented by the following general formula (1) and a repeating unit (B) represented by the following general formula (2). R1 and R2 independently denote a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group. The alkyl groups in R1 and R2 may be bonded together to form a ring. R3 and R4 independently denote a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. X denotes a single bond or a divalent organic group represented by the following general formula (3). R6 to R9 independently denote a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group.Type: ApplicationFiled: February 28, 2022Publication date: June 23, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shohei TOMITA, Masashi YOKOGI, Hiroki SHIBATA, Masaya YAMASHITA
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Publication number: 20220098135Abstract: A bisphenol composition includes 95% or more by mass of a bisphenol and 200 mass ppm or more of a compound represented by the following general formula (II): In formula (II), R21 and R22 denote a methyl group or a hydrogen atom; R22 is a methyl group when R21 is a hydrogen atom; R22 is a hydrogen atom when R21 is a methyl group; R23 to R25 independently denote a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and R23, R24, and R25 may be bonded or cross-linked between two of the groups. A method for producing a polycarbonate resin using the bisphenol composition is also described.Type: ApplicationFiled: September 13, 2021Publication date: March 31, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kei Uchiyama, Masashi Yokogi, Hiroki Shibata, Sora Tomita, Yuichi Yayama, Kenji Tsuruhara, Takayuki Yoshida, Yukie Nakashima, Rie Konishi, Kazuo Hirowatari
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Publication number: 20210403641Abstract: A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CR11R12—, —O—, —CO—, —S—, —SO—, or —SO2—, R11 and R12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R11 and R12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.Type: ApplicationFiled: September 13, 2021Publication date: December 30, 2021Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kei Uchiyama, Masashi Yokogi, Hiroki Shibata, Sora Tomita, Yuichi Yayama, Kenji Tsuruhara, Takayuki Yoshida, Yukie Nakashima, Rie Konishi, Kazuo Hirowatari
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Patent number: 10131761Abstract: The invention provides a glittering resin composition which includes: a polycarbonate resin that contains structural units derived from a dihydroxy compound having the portion represented by the following general formula (1) as a part of the structure thereof; and glittering particles in an amount of 0.1 parts by weight or more and 10 parts by weight or less per 100 parts by weight of the polycarbonate resin, wherein the glittering particles are inorganic particles (excluding metal particles) coated with a metal or a metal oxide or are metal particles: provided that a case where the portion represented by general formula (1) is a part of —CH2—O—H is excluded.Type: GrantFiled: March 15, 2013Date of Patent: November 20, 2018Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi Yokogi, Taku Kitade, Toshiaki Ebitani
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Patent number: 9670359Abstract: An object of the present invention is to provide a polycarbonate resin composition and a molded article, which are excellent in jet-blackness, image sharpness, impact resistance, scratch resistance owing to high hardness, flame retardancy and heat retention stability. The present invention provides a resin composition comprising a polycarbonate resin comprising a structural unit derived from a cyclic ether structure-containing dihydroxy compound and a coloring agent, which is a polycarbonate resin composition having an L* value of 6 or less as measured by the reflected light method of JIS K7105; and a molded article using the resin composition. The resin composition and the molded article of the present invention can be used over a wide range of fields allowing a product to be imparted with a high-grade appearance and a dignified impression.Type: GrantFiled: August 16, 2013Date of Patent: June 6, 2017Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroyoshi Kaito, Haruo Sasaki, Masashi Yokogi
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Publication number: 20160216408Abstract: An object of the present invention is to provide a retardation film succeeded in solving those conventional problems, that is, 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 of the present invention 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.Type: ApplicationFiled: April 4, 2016Publication date: July 28, 2016Applicants: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko TANAKA, Masashi YOKOGI, Nao MURAKAMI, Toshiyuki llDA
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Patent number: 9353215Abstract: The present invention is a method for producing a polycarbonate resin, comprising performing polycondensation through a transesterification reaction by using a catalyst and using a dihydroxy compound and a carbonic acid diester as raw material monomers, and feeding the produced polycarbonate resin to an extruder, wherein the dihydroxy compound contains at least a dihydroxy compound having a moiety represented by formula (1) in a part of the structure, the dihydroxy compound having a moiety represented by formula (1) contains a compound having a cyclic ether structure, and the temperature at the time of feeding the polycarbonate resin to the extruder is from 180° C. to less than 250° C., with the proviso excluding the case where the moiety represented by formula (1) is a part of —CH2—O—H CH2—O??(1).Type: GrantFiled: September 30, 2013Date of Patent: May 31, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi Yokogi, Shingo Namiki, Takehito Nagao, Masanori Yamamoto
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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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Publication number: 20150141577Abstract: The present invention relates to a transparent film obtained by molding a polycarbonate resin composition comprising a specific weight of (A) a polycarbonate resin containing (a) a specific structural unit and (b) a specific structural unit, and a specific weight of (B) a resin having a composition different from that of the polycarbonate resin (A), with a specific absolute value of the difference in the glass transition temperature between the resin (B) and the polycarbonate resin (A) and a specific absolute value of the difference in the refractive index, wherein in the transparent film, the ratio of the retardation measured at a wavelength of 450 nm to the retardation measured at a wavelength of 550 nm satisfies a specific formula.Type: ApplicationFiled: January 30, 2015Publication date: May 21, 2015Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shingo NAMIKI, Hiroyuki TAJIMA, Masashi YOKOGI, Tomohiko TANAKA, Akira KOSUGE
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Patent number: 9006351Abstract: The invention is to provide a polycarbonate resin composition and a molded polycarbonate resin article which combine excellent transparency and strength and which are suitable for use in the field of building materials, electrical/electronic field, automotive field, field of optical parts, etc. The invention relates to a polycarbonate resin composition containing a polycarbonate resin and an impact strength modifier, the polycarbonate resin containing structural units which are derived from a dihydroxy compound that has the portion represented by the following general formula (1) as part of the structure thereof and having a glass transition temperature lower than 145° C. and a molded polycarbonate resin article obtained by molding the composition. The polycarbonate resin composition gives a molded object having a thickness of 3 mm which has a total light transmittance of 60% or higher.Type: GrantFiled: January 14, 2013Date of Patent: April 14, 2015Assignees: Mitsubishi Chemical Corporation, Mitsubishi Plastics, Inc.Inventors: Masashi Yokogi, Kazuya Tanaka, Haruo Sasaki, Akira Kosuge
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Patent number: 8937146Abstract: The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin.Type: GrantFiled: November 12, 2013Date of Patent: January 20, 2015Assignees: Mitsubishi Chemical Corporation, Nitto Denko CorporationInventors: Masashi Yokogi, Shingo Namiki, Tomohiko Tanaka, Nao Murakami
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Patent number: 8907044Abstract: The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin.Type: GrantFiled: November 12, 2013Date of Patent: December 9, 2014Assignees: Mitsubishi Chemical Corporation, Nitto Denko CorporationInventors: Masashi Yokogi, Shingo Namiki, Tomohiko Tanaka, Nao Murakami
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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
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Publication number: 20140268334Abstract: The polycarbonate resin of the invention includes a first structural unit derived from a dihydroxy compound represented by a general formula (1), a second structural unit derived from a dihydroxy compound represented by a general formula (2), and a third structural unit derived from at least one dihydroxy compound selected from the group consisting of a dihydroxy compound represented by a general formula (3), a dihydroxy compound represented by a general formula (4), a dihydroxy compound represented by a general formula (5), and a dihydroxy compound represented by a general formula (6), and in which the first structural unit derived from a dihydroxy compound represented by the general formula (1) accounts for 18% by mole or more of the polycarbonate resin. The above general formulae (1) to (6) are described in the specification of the present application.Type: ApplicationFiled: May 30, 2014Publication date: September 18, 2014Applicants: MITSUBISH CHEMICAL CORPORATION, NITTO DENKO CORPORATIONInventors: Tomohiko TANAKA, Masashi YOKOGI, Nao MURAKAMI, Toshiyuki IIDA
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Publication number: 20140268333Abstract: An object of the present invention is to provide a retardation film succeeded in solving those conventional problems, that is, 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 of the present invention 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.Type: ApplicationFiled: March 14, 2014Publication date: September 18, 2014Applicants: NITTO DENKO CORPORATION, MITSUBISHI CHEMICAL CORPORATIONInventors: Tomohiko TANAKA, Masashi Yokogi, Nao Murakami, Toshiyuki IIDA
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Patent number: 8778486Abstract: The polycarbonate resin of the invention includes a first structural unit derived from a dihydroxy compound represented by a general formula (1), a second structural unit derived from a dihydroxy compound represented by a general formula (2), and a third structural unit derived from at least one dihydroxy compound selected from the group consisting of a dihydroxy compound represented by a general formula (3), a dihydroxy compound represented by a general formula (4), a dihydroxy compound represented by a general formula (5), and a dihydroxy compound represented by a general formula (6), and in which the first structural unit derived from a dihydroxy compound represented by the general formula (1) accounts for 18% by mole or more of the polycarbonate resin. The above general formulae (1) to (6) are described in the specification of the present application.Type: GrantFiled: May 17, 2012Date of Patent: July 15, 2014Assignees: Mitsubishi Chemical Corporation, Nitto Denko CorporationInventors: Tomohiko Tanaka, Masashi Yokogi, Nao Murakami, Toshiyuki Iida
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Patent number: 8742057Abstract: A polycarbonate resin composition (X), comprises: (A) a polycarbonate resin containing (a) a structural unit derived from a dihydroxy compound having a moiety represented by the following formula (1) in a part of a structure; and (B) an aromatic polycarbonate resin, wherein a reduced viscosity of the aromatic polycarbonate resin (B) is 0.55 dl/g or less, a proportion of the aromatic polycarbonate resin (B) in the polycarbonate resin composition (X) is 30 wt % or more, and a total light transmittance of the polycarbonate resin composition (X) is 90% or less: CH2—O??(1).Type: GrantFiled: August 19, 2013Date of Patent: June 3, 2014Assignee: Mitsubishi Chemical CorporationInventors: Masashi Yokogi, Haruo Sasaki
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Publication number: 20140073757Abstract: The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin.Type: ApplicationFiled: November 12, 2013Publication date: March 13, 2014Applicants: NITTO DENKO CORPORATION, MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi YOKOGI, Shingo NAMIKI, Tomohiko TANAKA, Nao MURAKAMI
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Publication number: 20140030505Abstract: The present invention is a method for producing a polycarbonate resin, comprising performing polycondensation through a transesterification reaction by using a catalyst and using a dihydroxy compound and a carbonic acid diester as raw material monomers, and feeding the produced polycarbonate resin to an extruder, wherein the dihydroxy compound contains at least a dihydroxy compound having a moiety represented by formula (1) in a part of the structure, the dihydroxy compound having a moiety represented by formula (1) contains a compound having a cyclic ether structure, and the temperature at the time of feeding the polycarbonate resin to the extruder is from 180° C. to less than 250° C., with the proviso excluding the case where the moiety represented by formula (1) is a part of —CH2—O—H.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Masashi YOKOGI, Shingo NAMIKI, Takehito NAGAO, Masanori YAMAMOTO
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Publication number: 20130331514Abstract: An object of the present invention is to provide a polycarbonate resin composition and a molded article, which are excellent in jet-blackness, image sharpness, impact resistance, scratch resistance owing to high hardness, flame retardancy and heat retention stability. The present invention provides a resin composition comprising a polycarbonate resin comprising a structural unit derived from a cyclic ether structure-containing dihydroxy compound and a coloring agent, which is a polycarbonate resin composition having an L* value of 6 or less as measured by the reflected light method of JIS K7105; and a molded article using the resin composition. The resin composition and the molded article of the present invention can be used over a wide range of fields allowing a product to be imparted with a high-grade appearance and a dignified impression.Type: ApplicationFiled: August 16, 2013Publication date: December 12, 2013Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroyoshi KAITO, Haruo Sasaki, Masashi Yokogi