Patents by Inventor Naohiro Fujita
Naohiro Fujita 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: 11905404Abstract: Provided is a resin composition that is capable of producing a cured product having excellent environmental suitability, high strength, and excellent flame retardancy, and that is suitably usable as a matrix resin for fiber-reinforced plastics. A resin composition contains (A) an epoxy resin, (B) a cyanate resin, (C) an aromatic amine curing agent that is liquid at 25° C., and (D) a phosphorus-containing compound represented by formula (1). Preferably, in formula (1), R1 and R2 each independently represent an alkyl group or an aryl group, and X and Y are an oxygen atom.Type: GrantFiled: June 27, 2019Date of Patent: February 20, 2024Assignee: ADEKA CORPORATIONInventors: Masato Inadome, Naohiro Fujita, Kazuhide Morino, Chihiro Asakura
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Patent number: 11649319Abstract: The present invention provides a resin composition for a fiber-reinforced plastic, the resin composition including a cyanate ester (A), an epoxy resin (B), and an aromatic amine-based curing agent that is liquid at 25° C. (C), wherein the average number of cyanate groups in the cyanate ester (A) is 2.1 or greater, and/or the average number of epoxy groups in the epoxy resin (B) is 2.1 or greater. A fiber-reinforced plastic that is produced using this composition and a reinforcing fiber has favorable heat resistance and excellent tensile and bending properties, and therefore can be applied to a wide variety of fields including transport vehicles such as ships, automobiles, and aircrafts, sporting goods, building materials such as sinks and window frames, as well as industrial machinery and materials such as high-pressure gas tanks and blades for wind power generation.Type: GrantFiled: February 26, 2018Date of Patent: May 16, 2023Assignee: ADEKA CORPORATIONInventors: Masato Inadome, Naohiro Fujita, Kazuhide Morino
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Publication number: 20220144999Abstract: A resin composition for fiber-reinforced plastic having a good balance between stability and curability and capable of producing fiber-reinforced plastic with improved strength. The composition contains an epoxy resin, an acid anhydride, and a catalyst that is liquid at 25° C. The catalyst is at least one member selected from the group consisting of a compound composed of an acid and a base and a compound composed of a quaternary onium cation and an anion.Type: ApplicationFiled: March 4, 2020Publication date: May 12, 2022Inventors: Kazuhide MORINO, Naohiro FUJITA
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Publication number: 20210163733Abstract: Provided is a resin composition that is capable of producing a cured product having excellent environmental suitability, high strength, and excellent flame retardancy, and that is suitably usable as a matrix resin for fiber-reinforced plastics. A resin composition contains (A) an epoxy resin, (B) a cyanate resin, (C) an aromatic amine curing agent that is liquid at 25° C., and (D) a phosphorus-containing compound represented by formula (1). Preferably, in formula (1), R1 and R2 each independently represent an alkyl group or an aryl group, and X and Y are an oxygen atom.Type: ApplicationFiled: June 27, 2019Publication date: June 3, 2021Inventors: Masato INADOME, Naohiro FUJITA, Kazuhide MORINO, Chihiro ASAKURA
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Publication number: 20210130538Abstract: The present invention provides a resin composition for a fiber-reinforced plastic, the resin composition including a cyanate ester (A), an epoxy resin (B), and an aromatic amine-based curing agent that is liquid at 25° C. (C), wherein the average number of cyanate groups in the cyanate ester (A) is 2.1 or greater, and/or the average number of epoxy groups in the epoxy resin (B) is 2.1 or greater. A fiber-reinforced plastic that is produced using this composition and a reinforcing fiber has favorable heat resistance and excellent tensile and bending properties, and therefore can be applied to a wide variety of fields including transport vehicles such as ships, automobiles, and aircrafts, sporting goods, building materials such as sinks and window frames, as well as industrial machinery and materials such as high-pressure gas tanks and blades for wind power generation.Type: ApplicationFiled: February 26, 2018Publication date: May 6, 2021Inventors: Masato INADOME, Naohiro FUJITA, Kazuhide MORINO
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Patent number: 10988928Abstract: A binding beam includes a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion and binding beam concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form.Type: GrantFiled: August 23, 2019Date of Patent: April 27, 2021Assignees: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATIONInventors: Takayuki Hirayama, Kazuto Nakahira, Hirokazu Nozawa, Yuuichirou Okuno, Takahiro Machinaga, Naohiro Fujita, Hiroto Takatsu, Kenji Yamazaki, Yukio Murakami, Tomohiro Kinoshita, Takanori Shimizu, Seishi Watanabe, Hiroori Yasuoka
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Patent number: 10557002Abstract: A resin composition for fiber reinforced plastic which is a resin composition comprising an epoxy resin (A), a cyanate resin (B) and a liquid aromatic amine curing agent (C), and, as necessary, further an active energy radiation absorbable component (D), wherein 20 to 100 percent by mass of the aforementioned epoxy resin (A) is an epoxy compound expressed by the following general formula (1), a cured product obtained by curing a composition containing said resin composition and a high-strength fiber-reinforced plastic; wherein (a) and (b) each independently express an integer from 2 to 10, (c) expresses an integer from 0 to 3, R1 and R2 each independently express a bivalent hydrocarbon group having 2 to 5 carbon atoms, and R3 expresses a single bond, a methylene group or —C(CH3)2—.Type: GrantFiled: August 25, 2016Date of Patent: February 11, 2020Assignee: ADEKA CORPORATIONInventors: Naohiro Fujita, Kazuhide Morino, Tasuku Aoki, Tomoko Kimura, Masato Inadome
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Publication number: 20190376283Abstract: A steel form is a steel form for forming a binding beam, including: a pair of Z-steels, wherein each of the pair of Z-steels is provided with a bottom plate portion and a side plate portion extending upward from the bottom plate portion, the bottom plate portion has a joining surface for joining the respective bottom plate portions of the pair of Z-steels to each other, and a groove portion allowing concrete placement is formed by the bottom plate portion and the side plate portion of each of the pair of Z-steelsType: ApplicationFiled: August 23, 2019Publication date: December 12, 2019Applicants: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATIONInventors: Takayuki HIRAYAMA, Kazuto NAKAHIRA, Hirokazu NOZAWA, Yuuichirou OKUNO, Takahiro MACHINAGA, Naohiro FUJITA, Hiroto TAKATSU, Kenji YAMAZAKI, Yukio MURAKAMI, Tomohiro KINOSHITA, Takanori SHIMIZU, Seishi WATANABE, Hiroori YASUOKA
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Publication number: 20190376289Abstract: A binding beam includes a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion and binding beam concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form.Type: ApplicationFiled: August 23, 2019Publication date: December 12, 2019Applicants: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATIONInventors: Takayuki HIRAYAMA, Kazuto NAKAHIRA, Hirokazu NOZAWA, Yuuichirou OKUNO, Takahiro MACHINAGA, Naohiro FUJITA, Hiroto TAKATSU, Kenji YAMAZAKI, Yukio MURAKAMI, Tomohiro KINOSHITA, Takanori SHIMIZU, Seishi WATANABE, Hiroori YASUOKA
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Publication number: 20180361685Abstract: A molding apparatus reduces waviness or deformation of fibers. The molding apparatus includes a fiber feeder (7) that feeds fibers (5) to a lamination area (32) long in a first direction, a resin composition feeder (11) that feeds a resin composition (9) to the lamination area (32), an impregnator (17) that impregnates the fibers (5) fed to the lamination area (32) with the resin composition (9), a curing accelerator (13) that accelerates curing of the resin composition (9) fed to the lamination area (32) while the fibers (5) fed in the lamination area (32) are being tensioned, and a transporter (15) that relatively moves the devices (7, 11, 17, and 13) in the first direction with respect to the lamination area (32). The resin composition (9) contains an epoxy resin (A), a cyanate resin (B), and an aromatic amine curing agent (C) that is liquid at 25° C.Type: ApplicationFiled: November 21, 2016Publication date: December 20, 2018Applicants: ADEKA CORPORATION, GH CRAFT LTD.Inventors: Naohiro FUJITA, Kazuhide MORINO, Masato INADOME, Masayoshi GOKE, Takeshi SUKEMUNE, Yosuke ARAGANE, Tomo KIMURA, Akinori OKUBO
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Publication number: 20180251612Abstract: A resin composition for fiber reinforced plastic which is a resin composition comprising an epoxy resin (A), a cyanate resin (B) and a liquid aromatic amine curing agent (C), and, as necessary, further an active energy radiation absorbable component (D), wherein 20 to 100 percent by mass of the aforementioned epoxy resin (A) is an epoxy compound expressed by the following general formula (1), a cured product obtained by curing a composition containing said resin composition and a high-strength fiber-reinforced plastic; wherein (a) and (b) each independently express an integer from 2 to 10, (c) expresses an integer from 0 to 3, R1 and R2 each independently express a bivalent hydrocarbon group having 2 to 5 carbon atoms, and R3 expresses a single bond, a methylene group or —C(CH3)2—.Type: ApplicationFiled: August 25, 2016Publication date: September 6, 2018Applicant: ADEKA CORPORATIONInventors: Naohiro FUJITA, Kazuhide MORINO, Tasuku AOKI, Tomoko KIMURA, Masato INADOME
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Patent number: 9315677Abstract: The present invention is an aqueous polyurethane resin composition for a flame retardant coated material comprised of an aqueous dispersion of a polyurethane resin obtained by extending a chain of an urethane prepolymer in an aqueous dispersion. The aqueous dispersion of the urethane prepolymer is obtained by reacting (a) a polyisocyanate component with (b) a polyol component which contains a phosphorus-containing polyol compound represented by the following general formula (1) as an essential component then dispersed the obtained prepolymer in the water, wherein a unit corresponding to the compound represented by the said general formula (1) is contained so that the phosphorus content in the urethane resin solid is 0.3 to 5.0 mass percent; R1 in the formula (1) represents an alkylene group having 2 to 4 carbon atoms, and m and n represent a number from 1 to 10.Type: GrantFiled: August 19, 2011Date of Patent: April 19, 2016Assignee: ADEKA CORPORATIONInventors: Naohiro Fujita, Nobuyuki Shimamura
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Publication number: 20140083239Abstract: A steering apparatus includes a grip core and a rim part. The grip core has a cross-sectional area substantially constant in a longitudinal direction of the grip core. The rim part is molded by foaming of a material liquid in a mold, and configured to cover the grip core. A first portion of the rim part is smaller in cross-sectional area than a second portion of the rim part, wherein the mold includes a vent opening facing the first portion of the rim part during the molding of the rim part, wherein the mold includes a material liquid infusion opening facing the second portion of the rim part during the molding of the rim part, and wherein the material liquid is infused into the mold through the material liquid infusion opening, and allowed to flow toward the vent opening.Type: ApplicationFiled: September 26, 2013Publication date: March 27, 2014Applicant: NIHON PLAST CO., LTD.Inventor: Naohiro FUJITA
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Publication number: 20130203936Abstract: The present invention is an aqueous polyurethane resin composition for a flame retardant coated material comprised of an aqueous dispersion of a polyurethane resin obtained by extending a chain of an urethane prepolymer in an aqueous dispersion. The aqueous dispersion of the urethane prepolymer is obtained by reacting (a) a polyisocyanate component with (b) a polyol component which contains a phosphorus-containing polyol compound represented by the following general formula (1) as an essential component then dispersed the obtained prepolymer in the water, wherein a unit corresponding to the compound represented by the said general formula (1) is contained so that the phosphorus content in the urethane resin solid is 0.3 to 5.0 mass percent; R1 in the formula (1) represents an alkylene group having 2 to 4 carbon atoms, and m and n represent a number from 1 to 10.Type: ApplicationFiled: August 19, 2011Publication date: August 8, 2013Applicant: ADEKA CORPORATIONInventors: Naohiro Fujita, Nobuyuki Shimamura
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Patent number: 8071208Abstract: The present invention provides an integral skin molded article used for vehicle internal parts, which enables good production efficiency and cost reduction and has good external appearance, and a method of preparing an integral skin molded article, and also provides a laminate with a skin comprising the integral skin molded article and a core material, and a method of preparing a laminate with a skin. Disclosed are an integral skin molded article obtained by injecting a polyurethane foam for a skin into a die after injecting a high density polyurethane resin for a core, containing a high density polyurethane resin for a skin, containing a polyol component, 1-methyl-3,5-diethyl-2,4-diaminobenzene and/or 1-methyl-3,5-diethyl-2,6-diaminobenzene, and a blowing agent into the same die; and a method of preparing a laminate with a skin comprising a skin molded article and a core material.Type: GrantFiled: September 17, 2008Date of Patent: December 6, 2011Assignees: Sumika Bayer Urethane Co., Ltd., Nihon Plast Co., Ltd.Inventors: Eiju Kochi, Naohiro Fujita, Takahiro Suwama, Shinji Nishikawa, Hiroaki Ido
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Publication number: 20110008628Abstract: The present invention is an aqueous polyurethane resin composition, which has excellent water resistance properties and chemical resistance properties etc. and is suitably available for a coating composition for surface-treated steels, characterized in that an isocyanurate compound (a) represented by the following general formula (1), a long-chain alkylenediol compound (b) having 10-32 carbon atoms, a polyisocyanate compound (c), a polyol compound (d), an anionic group-introducing compound (e), an anionic group neutralizing agent (f) and water are essential components. A, R1 and R2 in the general formula (1) are described in Claim 1.Type: ApplicationFiled: February 2, 2009Publication date: January 13, 2011Applicant: ADEKA CORPORATIONInventors: Naohiro Fujita, Akira Nakatsuji
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Publication number: 20090075084Abstract: The present invention provides an integral skin molded article used for vehicle internal parts, which enables good production efficiency and cost reduction and has good external appearance, and a method of preparing an integral skin molded article, and also provides a laminate with a skin comprising the integral skin molded article and a core material, and a method of preparing a laminate with a skin. Disclosed are an integral skin molded article obtained by injecting a polyurethane foam for a skin into a die after injecting a high density polyurethane resin for a core, containing a high density polyurethane resin for a skin, containing a polyol component, 1-methyl-3,5-diethyl-2,4-diaminobenzene and/or 1-methyl-3,5-diethyl-2,6-diaminobenzene, and a blowing agent into the same die; and a method of preparing a laminate with a skin comprising a skin molded article and a core material.Type: ApplicationFiled: September 17, 2008Publication date: March 19, 2009Inventors: Eiju Kochi, Naohiro Fujita, Takahiro Suwama, Shinji Nishikawa, Hiroaki Ido
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Publication number: 20080194757Abstract: The water-dispersed polyurethane composition of the present invention comprises a polyisocyanate component (a), a polyol component (b), and water as the essential components, wherein, at least, an isocyanate compound represented by general formula (I) below is used as the polyisocyanate component (a). The water-dispersed polyurethane composition of the present invention is excellent in adhesiveness, water resistance, corrosion resistance, heat resistance, weather resistance, water repellency, oil repellency, and the like, and can be suitably used as paint for surface-treated steel plates. wherein R1 represents an alkyl group having 10 to 30 carbon atoms, R2 represents —N?C?O or —NH—C(?O)C—O— R1, and A represents a residue other than two —N?C?O groups derived from a diisocyanate.Type: ApplicationFiled: September 21, 2005Publication date: August 14, 2008Applicant: ADEKA CORPORATIONInventors: Naohiro Fujita, Fumiaki Murano, Atsushi Ohyagi
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Patent number: 7226981Abstract: An epoxy resin curing agent composition containing a ketimine compound prepared by the reaction between a polyoxypropylenediamine component and a ketone compound, wherein (1) the polyoxypropylenediamine component is a 9/1 to 6/4 (by weight) mixture of polyoxypropylenediamine having a molecular weight of 200 and 500 and polyoxypropylenediamine having a molecular weight of 1000 to 3000, (2) the ketimine compound has a degree of ketimination of 90% or higher, or (3) the reaction is carried out in the presence of a catalyst selected from (i) a combination of a tertiary amine and a sulfonic acid and (ii) a salt between a tertiary amine and a sulfonic acid.Type: GrantFiled: May 17, 2004Date of Patent: June 5, 2007Assignee: Asahi Denka Co., Ltd.Inventors: Naohiro Fujita, Ryo Ogawa, Shoji Kusano
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Publication number: 20060198921Abstract: Disclosed is a structure for preventing resin leak of an injection molding of a resin covering layer on a covering surface of an insert member using a molding die which includes a first mold and a second mold which forms a cavity in combination with the first mold. The cavity receives the covering surface of the insert member for forming the resin covering layer. The first mold and the second mold include clamping surfaces which face each other and receive a portion of the insert member therebetween. The structure includes i) a first sealing portion provided on the portion of the insert member facing a location of the clamping surface near the cavity. The first sealing portion includes a ridge formed at the portion of the insert member.Type: ApplicationFiled: February 8, 2006Publication date: September 7, 2006Inventor: Naohiro Fujita