Patents by Inventor Yukinori Nakamichi
Yukinori Nakamichi 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: 10472514Abstract: A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; and the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit.Type: GrantFiled: January 22, 2015Date of Patent: November 12, 2019Assignees: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.Inventors: Takahiro Hisasue, Shigeo Nakajima, Yoshifumi Araki, Yukinori Nakamichi
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Patent number: 10138368Abstract: A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; and the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit.Type: GrantFiled: January 22, 2015Date of Patent: November 27, 2018Assignees: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.Inventors: Takahiro Hisasue, Shigeo Nakajima, Yoshifumi Araki, Yukinori Nakamichi
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Publication number: 20170002190Abstract: A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; and the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit.Type: ApplicationFiled: January 22, 2015Publication date: January 5, 2017Applicants: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.Inventors: Takahiro Hisasue, Shigeo Nakajima, Yoshifumi Araki, Yukinori Nakamichi
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Patent number: 9359537Abstract: It is an object to provide a block copolymer composition for a viscous adhesive, which will be a viscous adhesive composition excellent in balance of the adhesive properties such as tack strength and tackiness, having a low melt viscosity, and excellent solubility, coating properties, ejection stability, and surface skin quality. The block copolymer composition for a viscous adhesive having: a component (a) in an amount of 50 mass % or more and 90 mass % or less; and a component (b) in an amount of 10 mass % or more and 50 mass % or less; a content of the vinyl aromatic monomer unit being 25 to 50 mass %; a viscosity of the 15 mass % toluene solution being 10 to 40 mPa·s; and a number average molecular weight ratio of the component (b) to the component (a) being 2.0 to 4.0.Type: GrantFiled: July 18, 2013Date of Patent: June 7, 2016Assignees: Asahi Kasei Chemicals Corporation, Japan Elastomer Co., Ltd.Inventors: Shigeo Nakajima, Takahiro Hisasue, Kenji Ebara, Yukinori Nakamichi
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Publication number: 20150175855Abstract: It is an object to provide a block copolymer composition for a viscous adhesive, which will be a viscous adhesive composition excellent in balance of the adhesive properties such as tack strength and tackiness, having a low melt viscosity, and excellent solubility, coating properties, ejection stability, and surface skin quality. The block copolymer composition for a viscous adhesive having: a component (a) in an amount of 50 mass % or more and 90 mass % or less; and a component (b) in an amount of 10 mass % or more and 50 mass % or less; a content of the vinyl aromatic monomer unit being 25 to 50 mass %; a viscosity of the 15 mass % toluene solution being 10 to 40 mPa·s; and a number average molecular weight ratio of the component (b) to the component (a) being 2.0 to 4.0.Type: ApplicationFiled: July 18, 2013Publication date: June 25, 2015Applicants: Asahi Kasei Chemicals Corporation, Japan Elastomer Co., Ltd.Inventors: Shigeo Nakajima, Takahiro Hisasue, Kenji Ebara, Yukinori Nakamichi
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Patent number: 8563646Abstract: An adhesive composition having good balance in tackiness properties such as tack strength and retentivity, low melt viscosity, high processability, and high stability in melt viscosity under high temperature heating is provided. An adhesive composition containing two hydrogenated block copolymers and a predetermined tackifier is provided, the two hydrogenated block copolymers each having a different structure obtained by controlling the degree of hydrogenation of a block copolymer of a conjugated diene compound and a vinyl aromatic hydrocarbon in a particular range.Type: GrantFiled: April 10, 2009Date of Patent: October 22, 2013Assignees: Asahi Kasei Chemicals Corporation, Japan Elastomer Co., Ltd.Inventors: Shigeo Nakajima, Yukinori Nakamichi
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Patent number: 8039553Abstract: The present invention relates to an adhesive composition comprising (A) a block copolymer composition comprising a block copolymer (a) formed from at least two polymer blocks composed mainly of a monoalkenyl aromatic compound and at least one polymer block composed mainly of a conjugated diene compound and a block copolymer (b) formed from a polymer block composed mainly of a monoalkenyl aromatic compound and a polymer block composed mainly of a conjugated diene compound, wherein the block copolymer (a) has a GPC peak molecular weight of 60,000 to 110,000 in terms of standard polystyrene, the polymer block composed mainly of a monoalkenyl aromatic compound has a peak molecular weight of 10,000 to 30,000 and a molecular weight distribution Mw/Mn of 1.0 to 1.Type: GrantFiled: August 5, 2004Date of Patent: October 18, 2011Assignee: Japan Elastomer Co., Ltd.Inventors: Masahiro Fujiwara, Yukinori Nakamichi
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Publication number: 20110034614Abstract: An adhesive composition having good balance in tackiness properties such as tack strength and retentivity, low melt viscosity, high processability, and high stability in melt viscosity under high temperature heating is provided. An adhesive composition containing two hydrogenated block copolymers and a predetermined tackifier is provided, the two hydrogenated block copolymers each having a different structure obtained by controlling the degree of hydrogenation of a block copolymer of a conjugated diene compound and a vinyl aromatic hydrocarbon in a particular range.Type: ApplicationFiled: April 10, 2009Publication date: February 10, 2011Applicants: ASAHI KASEI CHEMICALS CORPORATION, JAPAN ELASTOMER CO., LTD.Inventors: Shigeo Nakajima, Yukinori Nakamichi
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Publication number: 20080009587Abstract: The present invention relates to an adhesive composition comprising (A) a block copolymer composition comprising a block copolymer (a) formed from at least two polymer blocks composed mainly of a monoalkenyl aromatic compound and at least one polymer block composed mainly of a conjugated diene compound and a block copolymer (b) formed from a polymer block composed mainly of a monoalkenyl aromatic compound and a polymer block composed mainly of a conjugated diene compound, wherein the block copolymer (a) has a GPC peak molecular weight of 60,000 to 110,000 in terms of standard polystyrene, the polymer block composed mainly of a monoalkenyl aromatic compound has a peak molecular weight of 10,000 to 30,000 and a molecular weight distribution Mw/Mn of 1.0 to 1.Type: ApplicationFiled: August 5, 2004Publication date: January 10, 2008Applicant: JAPAN ELASTOMER CO., LTD.Inventors: Masahiro Fujiwara, Yukinori Nakamichi
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Patent number: 6833411Abstract: A subject for the invention is to provide an asphalt composition excellent in high-temperature storage stability and low-temperature characteristics and having an excellent balance among properties. Another subject is to provide a resin composition which has a reduced gel content, satisfactory appearance, and excellent balance among properties including impact resistance and is especially suitable for use as thin films such as food wrap films, films for laminating, and heat-shrinkable films or transparent sheet moldings such as trays for foods or for parts of light electrical appliances, etc., blister cases, or the like.Type: GrantFiled: April 11, 2003Date of Patent: December 21, 2004Assignee: Japan Elastomer Co., Ltd.Inventors: Masahiro Fujiwara, Yukinori Nakamichi
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Publication number: 20040077789Abstract: The invention relates to a block copolymer composition comprising: from 100 to 20% by weight block copolymer (A) which comprises at least two polymer blocks mainly comprising a monoalkenylaromatic compound and at least one polymer block mainly comprising a conjugated diene; and from 0 to 80% by weight block copolymer.Type: ApplicationFiled: September 10, 2003Publication date: April 22, 2004Inventors: Keiichi Toda, Yukinori Nakamichi
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Publication number: 20030191241Abstract: A subject for the invention is to provide an asphalt composition excellent in high-temperature storage stability and low-temperature characteristics and having an excellent balance among properties.Type: ApplicationFiled: April 11, 2003Publication date: October 9, 2003Inventors: Masahiro Fujiwara, Yukinori Nakamichi