Patents by Inventor Shu Yoshida
Shu Yoshida 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: 9957349Abstract: A resin composition for transparent substrates comprises an epoxy resin (A) and a curing agent (B), wherein the curing agent (B) comprises a cyclohexane tricarboxylic anhydride.Type: GrantFiled: December 13, 2013Date of Patent: May 1, 2018Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Toyoji Oshima, Shu Yoshida, Takeru Horino, Rintaro Takahashi
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Patent number: 9274252Abstract: To provide a polycarbonate resin composition having a high Abbe's number, high strength and excellent stainability. Disclosed is a polycarbonate resin composition prepared by blending a polycarbonate resin (A) prepared by forming carbonate bonds in tricyclo[5.2.1.02,6]decanedimethanol with a diester or phosgene, and a weight-averaged molecular weight (Mw) of the polycarbonate resin (A) being equal to or more than 25,000, and a polycarbonate resin (B) prepared by reacting 2,2-bis(4-hydroxyphenyl)propane and phosgene, and weight-averaged molecular weight (Mw) of the polycarbonate resin (B) being equal to or more than 30,000, wherein a ratio thereof, 100×(A)/((A)+(B)), is from 1 to 99% by weight.Type: GrantFiled: August 11, 2010Date of Patent: March 1, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Hiroki Furuhashi, Shu Yoshida, Kazuaki Kaneko, Keiichi Kameyama
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Publication number: 20150337075Abstract: A resin composition for transparent substrates comprises an epoxy resin (A) and a curing agent (B), wherein the curing agent (B) comprises a cyclohexane tricarboxylic anhydride.Type: ApplicationFiled: December 13, 2013Publication date: November 26, 2015Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Toyoji OSHIMA, Shu YOSHIDA, Takeru HORINO, Rintaro TAKAHASHI
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Patent number: 9163116Abstract: To provide a polycarbonate resin composition excellent in low-birefringence and strength. Disclosed is a polycarbonate resin composition prepared by blending a polycarbonate resin (A) prepared by forming carbonate bonds in a 95-5% by mole of dihydroxy compound represented by formula (1) and a 5-95% by mole of dihydroxy compound represented by formula (2) with a diester carbonate, and a polycarbonate resin (B) prepared by forming carbonate bonds in dihydroxy compound represented by formula (3) with a diester carbonate or phosgene in a 45-85% ratio by weight of (100×(A))/((A)+(B)). (in the formula, R1 and R2 represent a hydrogen atom or methyl respectively.Type: GrantFiled: July 12, 2010Date of Patent: October 20, 2015Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Hiroki Furuhashi, Shu Yoshida, Kazuaki Kaneko, Keiichi Kameyama
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Patent number: 8674053Abstract: A method for highly polymerizing an aromatic polycarbonate resin, which enables the increase in molecular weight of the aromatic polycarbonate resin satisfactorily while keeping good quality of the resin. An aromatic polycarbonate is linked to an aliphatic diol compound having a boiling point of 240° C. or higher (preferably in an amount of 0.01 to 1.0 mole per mole of the total amount of the terminal of the aromatic polycarbonate) through a transesterification reaction in the presence of a transesterification catalyst under reduced pressure conditions (preferably at a reduced pressure ranging from 13 kPaA (100 torr) to 0.01 kPaA (0.01 torr)), thereby increasing the molecular weight of the resulting molecule. The weight average molecular weight (Mw) of the aromatic polycarbonate after the transesterification reaction can be increased preferably by 5,000 or more compared to that of the aromatic polycarbonate before the transesterification reaction.Type: GrantFiled: November 18, 2010Date of Patent: March 18, 2014Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yoshinori Isahaya, Shu Yoshida, Noriyuki Kato, Hiroki Furuhashi
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Publication number: 20130310535Abstract: The present invention provides a polycarbonate resin containing a structural unit represented by general formula (I). In formula (I), R's independently represent a halogen atom, an alkyl group having 1-9 carbon atoms, an aryl group having 6-12 carbon atoms, an alkenyl group having 2-5 carbon atoms, an alkoxy group having 1-5 carbon atoms, or an aralkyl group having 7-17 carbon atoms; n's independently mean the number of R's which substitute on the benzene ring and independently represent an integer of 0-4; Y represents an alkylene group having 1-4 carbon atoms; and p represents an integer of 0-4.Type: ApplicationFiled: January 23, 2012Publication date: November 21, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Yuki Kumagai, Shu Yoshida, Takashi Ishii, Kazuaki Kaneko, Kazuya Sekihara
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Publication number: 20130197166Abstract: A method for highly polymerizing an aromatic polycarbonate resin, which enables the increase in molecular weight of the aromatic polycarbonate resin satisfactorily while keeping good quality of the resin. An aromatic polycarbonate is linked to an aliphatic diol compound having a boiling point of 240° C. or higher (preferably in an amount of 0.01 to 1.0 mole per mole of the total amount of the terminal of the aromatic polycarbonate) through a transesterification reaction in the presence of a transesterification catalyst under reduced pressure conditions (preferably at a reduced pressure ranging from 13 kPaA (100 torr) to 0.01 kPaA (0.01 torr)), thereby increasing the molecular weight of the resulting molecule. The weight average molecular weight (Mw) of the aromatic polycarbonate after the transesterification reaction can be increased preferably by 5,000 or more compared to that of the aromatic polycarbonate before the transesterification reaction.Type: ApplicationFiled: November 18, 2010Publication date: August 1, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Yoshinori Isahaya, Shu Yoshida, Noriyuki Kato, Hiroki Furuhashi
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Patent number: 8436129Abstract: A polycarbonate resin having at least one terminal group which is represented by formula (1), and a resin composition and an optical material comprising the polycarbonate resin are disclosed. In the formula, R1-R9 each independently represent a hydrogen atom, halogen atom or an alkyl group. X1 represents a direct bond or alkylene group.Type: GrantFiled: April 23, 2009Date of Patent: May 7, 2013Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Noriyuki Kato, Shu Yoshida, Toshiaki Yamada, Jun Hagiwara
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Publication number: 20120220737Abstract: To provide a polycarbonate resin composition having a high Abbe's number, high strength and excellent stainability. Disclosed is a polycarbonate resin composition prepared by blending a polycarbonate resin (A) prepared by forming carbonate bonds in tricyclo[5.2.1.02,6]decanedimethanol with a diester or phosgene, and a weight-averaged molecular weight (Mw) of the polycarbonate resin (A) being equal to or more than 25,000, and a polycarbonate resin (B) prepared by reacting 2,2-bis(4-hydroxyphenyl)propane and phosgene, and weight-averaged molecular weight (Mw) of the polycarbonate resin (B) being equal to or more than 30,000, wherein a ratio thereof, 100×(A)/((A)+(B)), is from 1 to 99% by weight.Type: ApplicationFiled: August 11, 2010Publication date: August 30, 2012Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Hiroki Furuhashi, Shu Yoshida, Kazuaki Kaneko, Keiichi Kameyama
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Publication number: 20120178886Abstract: To provide a polycarbonate resin composition excellent in low-birefringence and strength. Disclosed is a polycarbonate resin composition prepared by blending a polycarbonate resin (A) prepared by forming carbonate bonds in a 95-5% by mole of dihydroxy compound represented by formula (1) and a 5-95% by mole of dihydroxy compound represented by formula (2) with a diester carbonate, and a polycarbonate resin (B) prepared by forming carbonate bonds in dihydroxy compound represented by formula (3) with a diester carbonate or phosgene in a 45-85% ratio by weight of (100×(A))/((A)+(B)). (in the formula, R1 and R2 represent a hydrogen atom or methyl respectively.Type: ApplicationFiled: July 12, 2010Publication date: July 12, 2012Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Hiroki Furuhashi, Shu Yoshida, Kazuaki Kaneko, Keiichi Kameyama
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Publication number: 20120116000Abstract: To provide a thermoplastic polymer composition excellent in molding. Disclosed is a thermoplastic polymer composition comprising A) a polycarbonate copolymer which is produced according to a melt method without adding any quencher, which comprises constitution units of (1) and (2), B) a mold release which is a partial ester formed of a C10-20 monovalent fatty acid and glycerol, and C) a hindered phenol antioxidant.Type: ApplicationFiled: April 5, 2010Publication date: May 10, 2012Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Shu Yoshida, Noriyuki Kato, Hiroki Furuhashi, Kazuaki Kaneko, Keiichi Kameyama
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Publication number: 20120095139Abstract: To provide a polycarbonate resin which is excellent in transparency, hue and ultraviolet-resistance of the molded product, is excellent in retention-stability at a high temperature, and causes sufficiently-reduced amount of the dirt on the metal mold during molding. A polycarbonate resin composition comprising A) a polycarbonate resin which is produced according to a melt method without adding any quencher, which comprises a constitution unit derived from 9,9-bis (4-(2-hydroxy ethoxy)phenyl)fluorene and a constitution unit derived from bisphenol A, B) a benzotriazole ultraviolet absorber, C) a mold release which is a partial ester formed of a C10-20 monovalent fatty acid and glycerol, and D) a hindered phenol antioxidant.Type: ApplicationFiled: April 19, 2010Publication date: April 19, 2012Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Shu Yoshida, Noriyuki Kato, Hiroki Furuhashi, Kazuaki Kaneko, Keiichi Kameyama
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Patent number: 8058384Abstract: The invention relates to a method for producing a thermoplastic resin, comprising using a composition at least comprising a fluorene-containing dihydroxy compound represented by the following formula (1) and a fluorene-containing hydroxy compound represented by the following formula (2) in an amount of from 0.5 parts by weight to 1.5 parts by weight relative to 100 parts by weight of the fluorene-containing dihydroxy compound of formula (1).Type: GrantFiled: October 26, 2009Date of Patent: November 15, 2011Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Noriyuki Kato, Toshiaki Yamada, Shu Yoshida, Jun Hagiwara, Hiroki Furuhashi, Kazuaki Kaneko, Keiichi Kameyama
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Patent number: 8026336Abstract: The present invention relates to a polycarbonate resin composition which comprises a polycarbonate resin having the repeating unit that is represented by the following general formula (1) and a hydroxyl group at terminal thereof and has the concentration of the terminal hydroxyl group of 1000 ppm or more.Type: GrantFiled: February 16, 2010Date of Patent: September 27, 2011Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Noriyuki Kato, Yoshinori Isahaya, Shu Yoshida, Jun Hagiwara, Kazuaki Kaneko, Keiichi Kameyama
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Patent number: 8013106Abstract: An optical lens which can be produced by injection molding on an industrial scale, and which has a high refractive index, a low Abbe's number, a low birefringence index, a high transparency and a high glass transition temperature. The optical lens can be produced by injection molding of a polycarbonate resin (preferably having a reduced viscosity of 0.2 dl/g or higher and a glass transition temperature of 120 to 160° C.), wherein the polycarbonate resin is produced by reacting a diol component comprising 99 to 51 mol % of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene and 1 to 49 mol % of bisphenol A with a carbonate diester. It becomes possible to produce an optical lens preferably having a refractive index of 1.60 to 1.65, an Abbe's number of 30 or smaller, a birefringence index of 300 nm or lower and an all light transmittance of 85.0% or higher.Type: GrantFiled: June 1, 2007Date of Patent: September 6, 2011Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Noriyuki Kato, Toshiaki Yamada, Eiji Koshiishi, Shu Yoshida
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Publication number: 20110201762Abstract: To provide a polycarbonate resin composition excellent in low-birefringence and environment resistance properties to be used for optical materials such as lenses, films or sheets. Disclosed is a polycarbonate resin composition comprising a polycarbonate resin (A) prepared by forming carbonate bonds in a dihydroxy compound represented by formula (1) with a diester carbonate, and a polycarbonate resin (B) prepared by forming carbonate bonds in 2,2-bis(4-hydroxyphenyl)propane with a diester carbonate or phosgene. In the formula, R1 and R2 each independently represent a hydrogen atom or methyl.Type: ApplicationFiled: July 23, 2009Publication date: August 18, 2011Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Toshiaki Yamada, Shu Yoshida, Jun Hagiwara, Kazuaki Kaneko
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Patent number: 7999055Abstract: The present invention can provide a polycarbonate resin containing a structural unit represented by the following formula (1). wherein R represents one selected from an alkyl group having 1 to 9 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an aralkyl group having 7 to 17 carbon atoms, and halogen; and n represents the number of substituting R's on a benzene ring and is an integer of 0 to 4. Y represents an alkylene group having 1 to 4 carbon atoms; and p is an integer of 0 to 4.Type: GrantFiled: May 19, 2008Date of Patent: August 16, 2011Assignee: Mitsubishi Gas Chemical Company, IncInventors: Shu Yoshida, Toshiaki Yamada
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Publication number: 20110112271Abstract: A polycarbonate resin having at least one terminal group which is represented by formula (1), and a resin composition and an optical material comprising the polycarbonate resin are disclosed. In the formula, R1-R9 each independently represent a hydrogen atom, halogen atom or an alkyl group. X1 represents a direct bond or alkylene group.Type: ApplicationFiled: April 23, 2009Publication date: May 12, 2011Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki Kato, Shu Yoshida, Toshiaki Yamada, Jun Hagiwara
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Patent number: 7905262Abstract: A tire (2) for a motorcycle includes a tread (4). The tread (4) has a center region (18), a pair of shoulder regions (20) and a pair of middle regions (22). In straight running, the center region (18) mainly comes in contact with a road surface. In cornering, the shoulder region (20) mainly comes in contact with a road surface. A modulus (Mm) of a rubber composition in the middle regions (22) is lower than a modulus (Mc) in the center region (18) and is higher than a modulus (Ms) in the shoulder regions (20). A ratio ((Mc?Mm)/(Mm?Ms)) is equal to or higher than 1/3 and is equal to or lower than 3/1. A ratio (Wm/W) is equal to or higher than 0.3 and is equal to or lower than 0.8. A ratio (Wc/W) is equal to or higher than 0.1 and is equal to or lower than 0.4. A ratio (Ws/W) is equal to or higher than 0.1 and is equal to or lower than 0.4.Type: GrantFiled: December 12, 2006Date of Patent: March 15, 2011Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Shu Yoshida
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Publication number: 20100210811Abstract: The present invention relates to a polycarbonate resin composition which comprises a polycarbonate resin having the repeating unit that is represented by the following general formula (1) and a hydroxyl group at terminal thereof and has the concentration of the terminal hydroxyl group of 1000 ppm or more.Type: ApplicationFiled: February 16, 2010Publication date: August 19, 2010Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Noriyuki KATO, Yoshinori ISAHAYA, Shu YOSHIDA, Jun HAGIWARA, Kazuaki KANEKO, Keiichi KAMEYAMA