Patents by Inventor Ikuro Yamaoka
Ikuro Yamaoka 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: 11555125Abstract: A coated steel sheet has a coating film on at least one side of a plated steel sheet. The coating film contains a binder resin, non-oxide ceramic particles containing V (excluding VC particles), and doped zinc oxide particles. The respective contents of the non-oxide ceramic particles containing V and the doped zinc oxide particles relative to the coating film satisfy the expressions: [(1) CZn?10.0, (2) CV?0.5·CZn, (3) CV?70?CZn, (4) CV?0.125·CZn, and (5) CV?2.0], where CV represents the content (mass %) of the non-oxide ceramic particles containing V, and CZn represents the content (mass %) of the doped zinc oxide particles. The coated steel sheet is excellent in both corrosion resistance before electrodeposition coating, and weldability.Type: GrantFiled: November 17, 2016Date of Patent: January 17, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Yasuaki Kawamura, Yoichiro Mori, Ikuro Yamaoka
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Patent number: 10697067Abstract: A steel sheet for a fuel tank according to the present invention includes: a Zn—Ni alloy plated layer placed on one surface or each of both surfaces of a base metal; and a chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface with the chromate-free chemical conversion coating film and reaching an interface with the steel sheet, the chromate-free chemical conversion coating film consists of an organosilicon compound consisting of a condensation polymer of a silane coupling agent, a phosphoric acid compound and/or a phosphonic acid compound, a vanadium compound, and a titanium compound and/or a zirconium compound, and a concentration of a total of amounts in terms of metal, per surface, of the phosphoric acid compound and/or the phosphonic acid compound+the vanadium compound+the titanium compound and/or the zirconium compound, is 5 mass % to 20 mass %.Type: GrantFiled: February 1, 2016Date of Patent: June 30, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kiyokazu Ishizuka, Noriyuki Maekawa, Hiroaki Uramoto, Masahiro Fuda, Ikuro Yamaoka, Kenichiro Matsumura
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Patent number: 10688755Abstract: A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.Type: GrantFiled: December 1, 2016Date of Patent: June 23, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kiyokazu Ishizuka, Noriyuki Maekawa, Hiroaki Uramoto, Masahiro Fuda, Ikuro Yamaoka, Kenichiro Matsumura
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Publication number: 20190330478Abstract: A coated steel sheet has a coating film on at least one side of a plated steel sheet. The coating film contains a binder resin, non-oxide ceramic particles containing V (excluding VC particles), and doped zinc oxide particles. The respective contents of the non-oxide ceramic particles containing V and the doped zinc oxide particles relative to the coating film satisfy the expressions: [(1) CZn?10.0, (2) CV?0.5·CZn, (3) CV?70?CZn, (4) CV?0.125·CZn, and (5) CV?2.0], where CV represents the content (mass %) of the non-oxide ceramic particles containing V, and CZn represents the content (mass %) of the doped zinc oxide particles. The coated steel sheet is excellent in both corrosion resistance before electrodeposition coating, and weldability.Type: ApplicationFiled: November 17, 2016Publication date: October 31, 2019Applicant: NIPPON STEEL CORPORATIONInventors: Yasuaki KAWAMURA, Yoichiro MORI, Ikuro YAMAOKA
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Publication number: 20180002813Abstract: A steel sheet for a fuel tank according to the present invention includes: a Zn—Ni alloy plated layer placed on one surface or each of both surfaces of a base metal; and a chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface with the chromate-free chemical conversion coating film and reaching an interface with the steel sheet, the chromate-free chemical conversion coating film consists of an organosilicon compound consisting of a condensation polymer of a silane coupling agent, a phosphoric acid compound and/or a phosphonic acid compound, a vanadium compound, and a titanium compound and/or a zirconium compound, and a concentration of a total of amounts in terms of metal, per surface, of the phosphoric acid compound and/or the phosphonic acid compound+the vanadium compound+the titanium compound and/or the zirconium compound, is 5 mass % to 20 mass %.Type: ApplicationFiled: February 1, 2016Publication date: January 4, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kiyokazu ISHIZUKA, Noriyuki MAEKAWA, Hiroaki URAMOTO, Masahiro FUDA, Ikuro YAMAOKA, Kenichiro MATSUMURA
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Publication number: 20170361571Abstract: A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.Type: ApplicationFiled: February 1, 2016Publication date: December 21, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kiyokazu ISHIZUKA, Noriyuki MAEKAWA, Hiroaki URAMOTO, Masahiro FUDA, Ikuro YAMAOKA, Kenichiro MATSUMURA
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Patent number: 9127367Abstract: A precoated metal sheet excellent in conductivity and corrosion resistance and able to be inexpensively produced is provided. The present invention is a conductive, corrosion resistant precoated metal sheet comprising a metal sheet on at least one surface of which is formed a coating film (?) which contains an organic resin (A) and non-oxide ceramic particles (B) with a 25° C. electrical resistivity of 0.1×10?6 to 185×10?6 ?cm selected from borides, carbides, nitrides, and silicides, a volume ratio of the organic resin (A) and the non-oxide ceramic particles (B) in the coating film (a) at 25° C. being 90:10 to 99.9:0.1, the organic resin (A) including a derivative (A2) of a resin (A1) which includes at least one type of functional group selected from a carboxyl group and sulfonic acid group in a structure of the resin (A1).Type: GrantFiled: September 1, 2011Date of Patent: September 8, 2015Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Ikuro Yamaoka, Atsushi Morishita
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Publication number: 20150044450Abstract: Precoated metal sheet for automobile use which is excellent in resistance weldability, corrosion resistance, and formability is provided. The present invention provides precoated metal sheet for automobile use comprising a metal sheet and a coat (?) on at least one surface of the metal sheet, wherein the coat (?) comprising an organic resin (A), non-oxide ceramic particles (B) selected from at least one type of borides, carbides, nitrides, and silicides and which have an electrical resistivity at 25° C. of 0.1×10?6 to 185×10?6 ?cm, and an anti-corrosive pigment (C).Type: ApplicationFiled: March 5, 2013Publication date: February 12, 2015Inventors: Kensei Yuasa, Ikuro Yamaoka, Atsushi Morishita
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Publication number: 20130161062Abstract: A precoated metal sheet excellent in conductivity and corrosion resistance and able to be inexpensively produced is provided. The present invention is a conductive, corrosion resistant precoated metal sheet comprising a metal sheet on at least one surface of which is formed a coating film (?) which contains an organic resin (A) and non-oxide ceramic particles (B) with a 25° C. electrical resistivity of 0.1×10?6 to 185×10?6 ?cm selected from borides, carbides, nitrides, and silicides, a volume ratio of the organic resin (A) and the non-oxide ceramic particles (B) in the coating film (?) at 25° C. being 90:10 to 99.9:0.1, the organic resin (A) including a resin (A1) which includes at least one type of functional group selected from a carboxyl group and sulfonic acid group in a structure of the resin (A1) or further a derivative (A2) of that resin (A1).Type: ApplicationFiled: September 1, 2011Publication date: June 27, 2013Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Ikuro Yamaoka, Atsushi Morishita
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Patent number: 7705066Abstract: The present invention provides an excellent radiation curable aqueous coating composition, which is highly safe and can make the adhesion to a metal surface and the corrosion resistance compatible which have been considered to conflict with each other, particularly adhesion after severe working and solvent resistance, and particularly durability to alcohols having high polarity. The composition of the present invention contains (1) a phosphoric acid ester compound having an ethylenically unsaturated double bond, (2) an aqueous polyurethane resin having both an ethylenically unsaturated double bond and a group capable of forming a salt, and (3) colloidal silica.Type: GrantFiled: July 17, 2002Date of Patent: April 27, 2010Assignee: DIC CorporationInventors: Shigehiro Tanaka, Masanori Takase, Hiroshi Matsuo, Hiroshi Kanai, Ikuro Yamaoka, Yoichiro Mori, Shin-ichi Ohara, Tadashi Fujii
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Publication number: 20040249012Abstract: The present invention provides an excellent radiation curable aqueous coating composition, which is highly safe and can make the adhesion to a metal surface and the corrosion resistance compatible which have been considered to conflict with each other, particularly adhesion after severe working and solvent resistance, and particularly durability to alcohols having high polarity. The composition of the present invention contains (1) a phosphoric acid ester compound having an ethylenically unsaturated double bond, (2) an aqueous polyurethane resin having both an ethylenically unsaturated double bond and a group capable of forming a salt, and (3) colloidal silica.Type: ApplicationFiled: August 5, 2004Publication date: December 9, 2004Inventors: Shigehiro Tanaka, Masanori Takase, Hiroshi Matsuo, Hiroshi Kanai, Ikuro Yamaoka, Yoichiro Mori, Shin-ichi Ohara, Tadashi Fujii
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Publication number: 20040121162Abstract: In order to provide an alkali-soluble-film surface-lubricated metal product excellent in moldability and long-term stable film-removability independent of the film drying temperature, an alkali-soluble lubricating film mainly comprising an alkali-soluble polyurethane aqueous composition containing a polyether polyol as a skeleton and also containing a carboxyl group within the molecule, and a lubricating function-imparting agent in an amount of 1 to 30 mass % based on the alkali-soluble polyurethane aqueous composition is coated on both surfaces or one surface of a metal to have a film thickness of 0.5 to 10 &mgr;m, thereby constituting an alkali-soluble-film surface-lubricated metal product excellent in moldability and long-term stable film-removability independent of the film drying temperature, wherein the elastic modulus of the film after coating is from 0.5 to 20 GPa at 25° C.Type: ApplicationFiled: September 30, 2003Publication date: June 24, 2004Inventors: Ikuro Yamaoka, Hiroshi Kanai, Akihiro Miyasaka, Yoichiro Mori, Tsutomu Tawa, Mitsuhiro Nishimura, Chikako Kouda
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Patent number: 6730407Abstract: A soluble lubricating surface-treated stainless steel sheet with excellent shapability for fuel tanks, comprising a substrate having on both surfaces or one surface thereof a soluble lubricating resin film. Preferably, the soluble lubricating resin film mainly comprises (A) an alkali-soluble polyurethane resin composition containing a carboxyl group or a sulfonic acid group within the molecule and having a glass transition point of 100° C. or more as a dry film and (B) a lubricating function-imparting agent in an amount of from 1 to 30% by mass based on the polyurethane composition.Type: GrantFiled: August 8, 2001Date of Patent: May 4, 2004Assignees: Nippon Steel Corporation, Mitsui Takeda Chemicals, Inc.Inventors: Yoichiro Mori, Akihiro Miyasaka, Hiroshi Kanai, Ikuro Yamaoka, Tsutomu Tawa, Chikako Kouda, Mitsuhiro Nishimura
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Publication number: 20040033909Abstract: A surface-lubricated metal product, with excellent shapability, comprising a metal having coated on both surfaces, or one surface, thereof an alkali-soluble lubricating film mainly comprising an alkali-soluble polyurethane aqueous composition containing a carboxyl group or a sulfonic acid group within the molecule, and a lubricating function-imparting agent in an amount of 1 to 30 mass % based on the alkali-soluble polyurethane aqueous composition, the film being coated to have a film thickness of 0.5 to 10 &mgr;m and the elastic modulus of the film after coating being 0.5 to 20 GPa at 25° C.Type: ApplicationFiled: May 15, 2003Publication date: February 19, 2004Inventors: Ikuro Yamaoka, Hiroshi Kanai, Akihiro Miyasaka, Yoichiro Mori, Tsutomu Tawa, Mitsuhiro Nishimura, Chikako Kouda
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Publication number: 20020098367Abstract: A soluble lubricating surface-treated stainless steel sheet with excellent shapability for fuel tanks, comprising a substrate having on both surfaces or one surface thereof a soluble lubricating resin film. Preferably, the soluble lubricating resin film mainly comprises (A) an alkali-soluble polyurethane resin composition containing a carboxyl group or a sulfonic acid group within the molecule and having a glass transition point of 100° C. or more as a dry film and (B) a lubricating function-imparting agent in an amount of from 1 to 30% by mass based on the polyurethane composition.Type: ApplicationFiled: August 8, 2001Publication date: July 25, 2002Inventors: Yoichiro Mori, Akihiro Miyasaka, Hiroshi Kanai, Ikuro Yamaoka, Tsutomu Tawa, Chikako Kouda, Mitsuhiro Nishimura
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Patent number: 5180535Abstract: A method of injection molding a styrene resin or a composition thereof, which includes injection molding a molten molding resin material of a styrene-conjugated diene block copolymer containing 50 to 90% by weight of a styrene polymer or a molten molding resin material of a resin composition comprising 50% by weight or more of the styrene-conjugated diene block copolymer and 50% by weight or less of a styrene resin other than the styrene-conjugated diene block copolymer, wherein the molten resin is injected and filled into a mold with a wall surface temperature at core and cavity portions within the mold being made 110.degree. to 180.degree. C., and the molded product is demolded when the wall surface temperature of the core and cavity portions is lowered to the glass transition temperature or lower of the styrene polymer moiety in the block copolymer. The obtained molded product has a high impact resistance.Type: GrantFiled: February 20, 1990Date of Patent: January 19, 1993Assignee: Nippon Steel CorporationInventors: Ikuro Yamaoka, Masao Kimura
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Patent number: 5006631Abstract: An aromatic polyester carbonate comprising structural units represented by the following formulae (A), (B), (C), and (D) and satisfying the following relationship when the mole fractions of the structural units represented by the formulae (A), (B), (C), and (D) are defined as a, b, c, and d, respectively: ##EQU1## and having an inherent viscosity [.eta..sub.inh ] in a solution at a concentration of 0.5 g/dl in p-chlorophenol as a solvent at 50.degree. C. of 1.0 dl/g or higher, or being insoluble in the solvent, and having liquid crystal properties ##STR1## wherein R is the same or different and represent an alkyl, phenyl group or a halogen, and n represents an integer of 0 to 4; ##STR2## X.sup.1 represents a substituted or non-substituted phenyl group, an alkyl group having 3 to 6 carbon atoms or a halogen;X.sup.2 represents --O--, --S--, ##STR3## or --CH.sub.2 --; X.sup.3 may be the same or different and represents an alkyl group, phenyl group, or a halogen; and m represents an integer of 0 to 4.Type: GrantFiled: July 19, 1989Date of Patent: April 9, 1991Assignees: Nippon Steel Corporation, Nippon Steel Chemical Co., Ltd.Inventors: Masanao Kawabe, Masao Kimura, Kazuhiro Sugiyama, Ikuro Yamaoka, Hiroharu Inoue