Patents by Inventor Hitoshi Okazaki
Hitoshi Okazaki 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: 11833722Abstract: A resin molding apparatus includes: a first molding mold provided with a first member and a second member configured to move relative to the first member, and configured to form a cavity by the first member and the second member; a second molding mold configured to hold a substrate; and a mask member so as to be relatively immovable with respect to the first member, configured to make contact with a portion of the substrate when the first molding mold and the second molding mold are clamped, and formed with a flow portion through which a resin material existing in the cavity and pressurized by the second member is capable of flowing.Type: GrantFiled: August 20, 2021Date of Patent: December 5, 2023Assignee: Towa CorporationInventors: Hayato Yasui, Yohei Onishi, Hitoshi Okazaki
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Publication number: 20230311103Abstract: A catalyst for production of carboxylic acid ester, containing: catalyst particles containing at least one element selected from the group consisting of nickel, cobalt, palladium, lead, platinum, ruthenium, gold, silver, and copper; and a support supporting the catalyst particles, wherein the catalyst for production of carboxylic acid ester has half-width Wa of pore distribution of 10 nm or less, the half-width Wa being calculated using BJH method from an adsorption isotherm obtained by nitrogen adsorption.Type: ApplicationFiled: September 4, 2020Publication date: October 5, 2023Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Dai NAGATA, Hitoshi OKAZAKI
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Publication number: 20220063149Abstract: A resin molding apparatus includes: a first molding mold provided with a first member and a second member configured to move relative to the first member, and configured to form a cavity by the first member and the second member; a second molding mold configured to hold a substrate; and a mask member so as to be relatively immovable with respect to the first member, configured to make contact with a portion of the substrate when the first molding mold and the second molding mold are clamped, and formed with a flow portion through which a resin material existing in the cavity and pressurized by the second member is capable of flowing.Type: ApplicationFiled: August 20, 2021Publication date: March 3, 2022Inventors: Hayato Yasui, Yohei Onishi, Hitoshi Okazaki
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Publication number: 20180171080Abstract: The present invention is able to provide a curable composition which contains a poly(meth)acrylate compound having a fluorene ring (component (A)), a polythiol compound having a thioalkyl structure (component (B)), an ene compound having a polycyclic aromatic hydrocarbon skeleton (component (C)), and a polymerization initiator (component (D)). A curable composition according to the present invention is especially useful as an adhesive for optical applications, and has high refractive index as an optical characteristic, while having low contractility, photocurability, colorlessness and transparency, viscosity suitable for work, and the like.Type: ApplicationFiled: May 19, 2016Publication date: June 21, 2018Inventors: Kousuke NAMIKI, Sawako FUSE, Hitoshi OKAZAKI, Eiji KOSHIISHI, Kikuo FURUKAWA, Hiroshi HORIKOSHI
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Patent number: 9920169Abstract: According to the present invention, a curable composition can be provided, said composition being characterized by comprising: (A) an episulfide compound; and (B) a photobase generator comprising an organoboron compound represented by general formula (1) below: (In general formula (1), R1, R2, R3, R4 and R5 may be the same as or different from one another and independently represent an alkyl group having 1 to 8 carbon atoms; and Ar1, Ar2 and Ar3 may be the same as or different from one another and independently represent a group selected from the group consisting of a phenyl group, a naphthyl group, an anthracenyl group and a phenanthryl group, each of which may have a substituent selected from the group consisting of an alkyl group, an aryl group, an alkenyl group, a cycloalkyl group and a heterocyclic group.Type: GrantFiled: June 26, 2014Date of Patent: March 20, 2018Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kousuke Namiki, Hitoshi Okazaki, Eiji Koshiishi, Sawako Fuse, Kikuo Furukawa
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Patent number: 9518153Abstract: The present invention addresses the problem of providing: a catalyst for preliminary reaction and a preliminary reaction method, which are suitable for a composition that is obtained by adding a thiol compound and an isocyanate compound to an episulfide compound; and a polymerizable composition for optical materials, which is capable of preventing yellowing of an optical material which contains a composition that is obtained by adding a thiol compound and an isocyanate compound to an episulfide compound.Type: GrantFiled: February 27, 2013Date of Patent: December 13, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Eiji Koshiishi, Hitoshi Okazaki, Motoharu Takeuchi
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Patent number: 9376603Abstract: According to the present invention, a polymerizable composition having excellent storage stability can be provided by adding an acid that serves as a stabilizing agent and a free-radical polymerization inhibitor to a polymerizable composition that contains a polythiol compound and an enic compound having a phenylthio backbone as monomer components. In the present invention, an embodiment in which the acid is at least one compound having a protonic-acid-type functional group which is selected from phosphoric acid, phosphonic acid, phosphinic acid, sulfonic acid, sulfoneimide and carboxylic acid is preferred.Type: GrantFiled: October 16, 2013Date of Patent: June 28, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Hitoshi Okazaki, Kousuke Namiki, Motoharu Takeuchi
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Publication number: 20160152774Abstract: According to the present invention, a curable composition can be provided, said composition being characterized by comprising: (A) an episulfide compound; and (B) a photobase generator comprising an organoboron compound represented by general formula (1) below: (In general formula (1), R1, R2, R3, R4 and R5 may be the same as or different from one another and independently represent an alkyl group having 1 to 8 carbon atoms; and Ar1, Ar2 and Ar3 may be the same as or different from one another and independently represent a group selected from the group consisting of a phenyl group, a naphthyl group, an anthracenyl group and a phenanthryl group, each of which may have a substituent selected from the group consisting of an alkyl group, an aryl group, an alkenyl group, a cycloalkyl group and a heterocyclic group.Type: ApplicationFiled: June 26, 2014Publication date: June 2, 2016Inventors: Kousuke Namiki, Hitoshi Okazaki, Eiji Koshiishi, Sawako Fuse, Kikuo Furukawa
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Publication number: 20150252234Abstract: According to the present invention, a polymerizable composition having excellent storage stability can be provided by adding an acid that serves as a stabilizing agent and a free-radical polymerization inhibitor to a polymerizable composition that contains a polythiol compound and an enic compound having a phenylthio backbone as monomer components. In the present invention, an embodiment in which the acid is at least one compound having a protonic-acid-type functional group which is selected from phosphoric acid, phosphonic acid, phosphinic acid, sulfonic acid, sulfoneimide and carboxylic acid is preferred.Type: ApplicationFiled: October 16, 2013Publication date: September 10, 2015Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Hitoshi Okazaki, Kousuke Namiki, Motoharu Takeuchi
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Publication number: 20150011727Abstract: The present invention includes a polymerizable composition for optical materials, which contains a thiourethane oligomer that is obtained by preliminarily reacting the whole or a part of a thiol compound and an isocyanate compound in a composition that contains an episulfide compound, the thiol compound and the isocyanate compound, while using a compound represented by formula (2) below as a catalyst for preliminary reaction. (In formula (2), R represents an alkyl group having 1 to 4 carbon atoms; and X represents an organic group which has 2 to 11 carbon atoms and contains a vinyl group, a vinylidene group or a vinylene group.Type: ApplicationFiled: February 27, 2013Publication date: January 8, 2015Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Eiji Koshiishi, Hitoshi Okazaki, Motoharu Takeuchi
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Patent number: 8853346Abstract: The invention relates to a curable composition preferable as a raw material for optical materials such as adhesive agents for optical elements, coating agents for optical elements, resist materials, prisms, optical fibers, information recording substrates, filters and plastic lenses, and more specifically to a curable composition characterized by containing (A) an episulfide compound, and (B) a polymerization catalyst comprising a tetraalkylphosphonium dialkylphosphate represented by the following general formula (1): wherein R1 to R6 are the same or different, an alkyl group having 1 to 8 carbon atoms or an alkyl group having a hydroxyl group and 1 to 8 carbon atoms, and linear, branched or cycloaliphatic.Type: GrantFiled: February 8, 2011Date of Patent: October 7, 2014Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hitoshi Okazaki, Motoharu Takeuchi
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Publication number: 20140140714Abstract: A fixing device includes an endless belt, a heating unit that heats the belt, a rotating body that rotates while applying pressure to a recording medium interposed between the rotating body and the belt, a pressing member that forms a first area in which the recording medium is to be nipped between the belt and the rotating body by pressing the belt against the rotating body from an inside of the belt, and a driving member that drives the rotating body so that the rotating body rotates at a speed determined such that a time obtained by dividing a length of the first area in a direction in which the rotating body is rotating by the speed is approximately 20 milliseconds or less.Type: ApplicationFiled: April 11, 2013Publication date: May 22, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Yasuto OKABAYASHI, Yasuhiro UEHARA, Hitoshi OKAZAKI, Hisashi MURASE, Toshiyuki MIYATA
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Publication number: 20130078470Abstract: A fixing belt includes a base layer that contains a resin, a flat metal heat-generating layer that is provided on the base layer and contains metal as a main component, and a protective layer that is provided on the metal heat-generating layer and contains a resin, wherein the metal heat-generating layer contains resin portions that pass through the metal heat-generating layer in a thickness direction of the layer, and the resin portions contain at least one of the resin of the base layer and the resin of the protective layer.Type: ApplicationFiled: March 5, 2012Publication date: March 28, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Hisashi MURASE, Hitoshi OKAZAKI
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Publication number: 20130018168Abstract: The invention relates to a curable composition preferable as a raw material for optical materials such as adhesive agents for optical elements, coating agents for optical elements, resist materials, prisms, optical fibers, information recording substrates, filters and plastic lenses, and more specifically to a curable composition characterized by containing (A) an episulfide compound, and (B) a polymerization catalyst comprising a tetraalkylphosphonium dialkylphosphate represented by the following general formula (1): wherein R1 to R6 are the same or different, an alkyl group having 1 to 8 carbon atoms or an alkyl group having a hydroxyl group and 1 to 8 carbon atoms, and linear, branched or cycloaliphatic.Type: ApplicationFiled: February 8, 2011Publication date: January 17, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Hitoshi Okazaki, Motoharu Takeuchi
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Patent number: 7691555Abstract: There are provided a photocurable composition capable of being readily cured by irradiation of ultraviolet rays and a cured product of the photocurable composition, as well as a coating composition and a coating film obtained from the coating composition. The cured product exhibits a high refractive index, a less discoloration and an excellent transparency. The present invention relates to a photocurable composition comprising (A) an episulfide compound containing a thiirane ring; and (B) a photo-base generator represented by the general formula (1): wherein Ar is phenyl, etc.; R is an alkyl group, etc.; —A+ is an ammonium ion; and X? is a borate anion, etc., and a coating composition comprising the photocurable composition and (C) a modified silicone oil, as well as a cured product and a coating film obtained from these compositions.Type: GrantFiled: August 4, 2004Date of Patent: April 6, 2010Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hitoshi Okazaki, Junya Hayakawa, Motoharu Takeuchi, Masahiro Johno, Kenji Ishii
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Patent number: 7553891Abstract: A flame-retardant epoxy resin composition, as well as an electronic device, a laminated circuit board, a multilayered circuit board and a printed circuit board employing the flame-retardant epoxy resin composition are disclosed. The flame-retardant epoxy resin composition contains: an epoxy resin; an epoxy resin curing agent; and flame-retardant particles containing a metal hydrate. The flame-retardant particles are provided with a coating layer on the surfaces thereof and have a volume average particle diameter in a range from 1 to 500 nm.Type: GrantFiled: August 12, 2005Date of Patent: June 30, 2009Assignee: Fuji Xerox CorporationInventors: Takuro Hoshio, Hitoshi Okazaki, Masayuki Okoshi, Michiaki Yasuno
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Patent number: 7511087Abstract: A sheath composition and a cable using the sheath composition are disclosed. The sheath composition contains a polyolefine resin and flame-retardant particles containing a metal hydrate. The flame-retardant particles are provided with a coating layer on the surfaces thereof and have a volume average particle diameter in a range from 1 to 500 nm.Type: GrantFiled: August 17, 2005Date of Patent: March 31, 2009Assignee: Fuji Xerox Co., Ltd.Inventors: Takuro Hoshio, Hitoshi Okazaki, Masayuki Okoshi, Michiaki Yasuno
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Publication number: 20080152404Abstract: A fixing device comprises: a fixing belt that has a surface release layer of a fluorinated-resin tube, the fixing belt being laid across by a fixing roller and a tension roller; a pressurizing member that presses the fixing roller through the fixing belt; and a release member that presses the fixing belt on the pressurizing member, in a substantial vicinity of a downstream of a pressure contact site of between the fixing roller and the pressurizing member, and strips a recording material from the fixing belt, the fixing device fixing a toner image on the recording material by heat.Type: ApplicationFiled: June 25, 2007Publication date: June 26, 2008Inventors: Daisuke Yoshino, Toshiyuki Miyata, Yasuhiro Uehara, Yasuo Sakaguchi, Hitoshi Okazaki, Takuro Hoshio, Fumio Daishi
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Patent number: 7354958Abstract: The invention provides a photopolymerizable composition comprising: flame-retardant particles which contains a hydrated metal and have an average diameter of about 1 to 500 nm; and a photopolymerization reactive material. The hydrated metal preferably includes at least one selected from the group consisting of a hydrated magnesium, hydrated calcium, hydrated aluminum, hydrated zinc, hydrated barium, hydrated copper and hydrated nickel. A cover layer which comprises an organic compound or a polysilicone is preferably formed on surfaces of the flame-retardant particles. The invention provides a flame-retardant resin-formed article which is formed of the photopolymerized photopolymerizable composition. A flame retardancy of the article measured in accordance with the UL-94 test preferably scores HB or higher.Type: GrantFiled: August 3, 2005Date of Patent: April 8, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Masayuki Ohkoshi, Hitoshi Okazaki, Takuro Hoshio, Michiaki Yasuno
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Patent number: 7300747Abstract: The photobase generator of the invention is represented by the following formula 1: wherein Ar, R, A+ and X? are as defined in the specification. Since the photobase generator of the formula 1 absorbs ultraviolet lights of relatively long wavelength and is photolyzed to generate a strong base efficiently, a composition containing the photobase generator and an episulfide compound is easily cured by polymerization under ultraviolet irradiation.Type: GrantFiled: February 7, 2005Date of Patent: November 27, 2007Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hitoshi Okazaki, Junya Hayakawa, Motoharu Takeuchi, Masahiro Jono, Kenji Ishii