Patents by Inventor Akira Ishikubo
Akira Ishikubo 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: 10947353Abstract: A resin composition for insulating coating material, comprises: a polyimide resin and/or a precursor thereof; and a polymer having a heterocyclic ring at a side chain, wherein the content of the polymer having a heterocyclic ring at a side chain is 0.1 to 7 parts by weight relative to 100 parts by weight of the polyimide resin and/or the precursor thereof. By adding a prescribed amount of the polymer having a heterocyclic ring at a side chain, there can be obtained a resin composition for insulating coating material still maintaining heat resistance and together having excellent bending resistance.Type: GrantFiled: September 28, 2018Date of Patent: March 16, 2021Assignee: Mitsubishi Chemical CorporationInventors: Takeshi Kato, Akira Ishikubo, Yu Echigo, Mika Matsumoto, Jiro Sugiyama
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Patent number: 10617611Abstract: The present invention relates to a core-shell type polymer particle including a shell part composed of an amphoteric polymer (A) and a core part composed of a hydrophobic polymer (B).Type: GrantFiled: August 28, 2019Date of Patent: April 14, 2020Assignee: Mitsubishi Chemical CorporationInventors: Kiyomi Takei, Akira Ishikubo, Yuji Soejima
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Patent number: 10568816Abstract: The present invention relates to a core-shell type polymer particle including a shell part composed of an amphoteric polymer (A) and a core part composed of a hydrophobic polymer (B).Type: GrantFiled: August 28, 2019Date of Patent: February 25, 2020Assignee: Mitsubishi Chemical CorporationInventors: Kiyomi Takei, Akira Ishikubo, Yuji Soejima
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Publication number: 20190380926Abstract: The present invention relates to a core-shell type polymer particle including a shell part composed of an amphoteric polymer (A) and a core part composed of a hydrophobic polymer (B).Type: ApplicationFiled: August 28, 2019Publication date: December 19, 2019Applicant: Mitsubishi Chemical CorporationInventors: Kiyomi Takei, Akira Ishikubo, Yuji Soejima
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Publication number: 20190299032Abstract: An oil-in water emulsion cosmetic composition has a good feeling in use and excellent dispersion stability, and does not cause patchiness upon drying. A hydrophobized powder is dispersed in an oil phase and processed with a wet type disperser to obtain a dispersed solution. A water phase is added thereto and processed with a homomixer, to obtain an oil-in water emulsion composition having excellent usability. The powder is easily dispersed upon application to skin. The dispersion stability of the powder is further improved, and the precipitation and creaming of the emulsion particle can be eliminated by blending a thickener having salt tolerance. A sticky feeling is eliminated by using succinoglycan as a thickener, and patchiness is eliminated by plasticizing said succinoglycan.Type: ApplicationFiled: June 20, 2019Publication date: October 3, 2019Inventors: Susumu Yoshida, Tadashi Nakamura, Akira Ishikubo, Akio Nasu
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Publication number: 20190031844Abstract: A resin composition for insulating coating material, comprises: a polyimide resin and/or a precursor thereof; and a polymer having a heterocyclic ring at a side chain, wherein the content of the polymer having a heterocyclic ring at a side chain is 0.1 to 7 parts by weight relative to 100 parts by weight of the polyimide resin and/or the precursor thereof. By adding a prescribed amount of the polymer having a heterocyclic ring at a side chain, there can be obtained a resin composition for insulating coating material still maintaining heat resistance and together having excellent bending resistance.Type: ApplicationFiled: September 28, 2018Publication date: January 31, 2019Applicant: Mitsubishi Chemical CorporationInventors: Takeshi KATO, Akira ISHIKUBO, Yu ECHIGO, Mika MATSUMOTO, Jiro SUGIYAMA
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Publication number: 20180056096Abstract: This object of the invention is to provide an oil-in water emulsion cosmetic composition having fine sense of use and excellent dispersion stability, and does not occur twisting upon drying. In advance, a hydrophobicized powder is dispersed in an oil phase and processed with wet type disperser such as beads mill, dispersing solution is obtained. And then said dispersing solution and a water phase are processed with homomixer, an oil-in water emulsion composition having excellent sense of use and dispersibility of powder after applying to skin can be obtained. The dispersing stability of powder is extremely good by using a particular dispersant and a particular oil component. The dispersion stability of powder is further improved, and the precipitation and creaming of the emulsion particle can be solved by blending thickener having salt tolerance. Sticky feeling is solved by using succinoglycan as a thickener, and twisting is solved by plasticizing said succinoglycan.Type: ApplicationFiled: November 6, 2017Publication date: March 1, 2018Inventors: Susumu Yoshida, Tadashi Nakamura, Akira Ishikubo, Akio Nasu
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Publication number: 20170266085Abstract: The present invention relates to a core-shell type polymer particle including a shell part composed of an amphoteric polymer (A) and a core part composed of a hydrophobic polymer (B).Type: ApplicationFiled: June 6, 2017Publication date: September 21, 2017Applicant: Mitsubishi Chemical CorporationInventors: Kiyomi TAKEI, Akira Ishikubo, Yuji Soejima
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Publication number: 20160106656Abstract: Disclosed is a cosmetic composition comprising: a copolymer (?) or (?); a cationic surfactant; and a higher alcohol. The copolymer (?) includes a constituent unit derived from a monomer (a) acrylic acid and/or methacrylic acid, and at least one constituent unit derived from three different monomers, wherein from 50 to 100 mass % of a constituent unit derived from a vinyl monomer (A) having a carboxyl group. The copolymer (?) includes a constituent unit derived from a monomer (a) acrylic acid and/or methacrylic acid and at least one constituent unit derived from four different monomers, wherein from 50 to 100 mass % of a constituent unit derived from a vinyl monomer (A) having a carboxyl group and wherein from 50 to 100 mol % of the carboxyl groups are not neutralized.Type: ApplicationFiled: October 20, 2014Publication date: April 21, 2016Inventors: Nobuaki UEHARA, Shoya YODA, Akira ISHIKUBO
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Patent number: 9259382Abstract: The present invention relates to a cosmetic composition comprising: a copolymer having a constituent unit corresponding to (A) a vinyl monomer having a carboxyl group in a structure and a constituent unit corresponding to (B) a vinyl monomer represented by the following formula (1); a cationic surfactant; a higher alcohol; and a silicone oil: CH2?C(R1)—CO—X-(Q-O)r—R2??(1) wherein R1 is a hydrogen atom or a methyl group; R2 is a hydrogen atom or an alkyl group having a carbon number of 1 to 5, each of which may have a substituent; Q is an alkylene group having a carbon number of 2 to 4, which may have a substituent; r represents an integer of 2 to 15; and X represents an oxygen atom or NH, and the number of atoms bonded linearly to each other in the structure of -(Q-O)r—R2 is 70 or less.Type: GrantFiled: April 22, 2013Date of Patent: February 16, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Akira Ishikubo, Shoya Yoda
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Patent number: 8673326Abstract: The present invention provides an oil-in-water emulsion composition having excellent emulsion stability, low sticky feeling, and low skin irritation. The oil-in-water emulsion composition according to the present invention comprising (a) 1 to 20 mass % of a powder component, (b) 0.001 to 0.5 mass % of a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component, having a structure wherein (a) powder particles are adsorbed on the oil droplets dispersed in the water phase.Type: GrantFiled: April 25, 2008Date of Patent: March 18, 2014Assignee: Shiseido Company Ltd.Inventors: Akira Ishikubo, Yuji Matsushita, Yosuke Ikebe, Taizo Fujiyama, Tomonori Toyoda, Kazuho Koiwa
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Patent number: 8551332Abstract: The present invention is affinity particles that are characterized by having phosphorylcholine groups represented by the following formula (1) covalently bonded onto the surface of inorganic powder and also by having ligands having specific affinity with a certain target substance covalently bonded or adsorbed onto the surface of inorganic powder. The object of the present invention is to provide an affinity separation method that uses affinity particles utilizing inexpensive inorganic particles and is capable of separating the target substance easily and with high accuracy.Type: GrantFiled: July 1, 2009Date of Patent: October 8, 2013Assignees: Shiseido Company, Ltd.Inventors: Katsuyuki Maeno, Kazuyuki Miyazawa, Akira Ishikubo, Kazuhiko Ishihara
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Publication number: 20130236411Abstract: The present invention relates to a cosmetic composition comprising: a copolymer having a constituent unit corresponding to (A) a vinyl monomer having a carboxyl group in a structure and a constituent unit corresponding to (B) a vinyl monomer represented by the following formula (1); a cationic surfactant; a higher alcohol; and a silicone oil: CH2?C(R1)—CO—X-(Q-O)r—R2??(1) wherein R1 is a hydrogen atom or a methyl group; R2 is a hydrogen atom or an alkyl group having a carbon number of 1 to 5, each of which may have a substituent; Q is an alkylene group having a carbon number of 2 to 4, which may have a substituent; r represents an integer of 2 to 15; and X represents an oxygen atom or NH, and the number of atoms bonded linearly to each other in the structure of -(Q-O)r—R2 is 70 or less.Type: ApplicationFiled: April 22, 2013Publication date: September 12, 2013Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Akira ISHIKUBO, Shoya Yoda
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Patent number: 8496919Abstract: To provide a cosmetic composition and a hair wash which are excellent in metal pyrithione salt persistence after washing with a washing liquid containing a surfactant, etc. A cosmetic composition and a hair wash, which comprise a copolymer and a metal pyrithione salt, wherein the copolymer contains constituting units corresponding to a cationic vinyl monomer of a specific structure and constituting units corresponding to a nonionic vinyl monomer of a specific structure.Type: GrantFiled: August 12, 2011Date of Patent: July 30, 2013Assignee: Mitsubishi Chemical CorporationInventors: Akira Ishikubo, Shoya Yoda
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Patent number: 8232321Abstract: The present invention is to provide a new compound having a rough skin improving effect, excellent in safety, excellent in texture in use, especially free of sticky feeling, excellent in refreshing feeling, and capable to improve the base agent stability as a component. An alkylene oxide derivative is characterized by being represented by the below-described general formula (I): (formula I) Z—{O-[(AO)a-(EO)b]-R}2??(I) (In the formula, Z is the residue obtained by removing hydroxyl groups from the dimer diol, EO is an oxyethylene group, AO is an oxyalkylene group having 3 to 4 carbon atoms, and the addition form is block-type. The symbols a and b are the average addition mole numbers of the above-described oxyalkylene group and the oxyethylene group, respectively, and they are 1?2 a?150 and 1?2 b?150. The percentage of the oxyethylene groups with respect to the sum of the oxyalkylene groups having 3 to 4 carbon atoms and the oxyethylene groups is 10 to 99 mass %.Type: GrantFiled: July 25, 2008Date of Patent: July 31, 2012Assignees: Shiseido Company, Ltd., NOF CorporationInventors: Takashi Ohmori, Akira Ishikubo, Yuki Sugiyama, Yuko Matsui, Tomoyuki Kawasoe, Yoji Tezuka, Hiroyasu Mizuno, Kei-ichi Maruyama
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Patent number: 8173112Abstract: An emulsified composition for hair, which contains a nonionic surfactant that is a solid at normal temperature and has a Krafft point of at least 40° C., an oil component, and water, and which has an average emulsified particle size of 0.5 ?m or less, provides long-lasting luster. Further, an emulsified composition for hair, which is an water-in-oil emulsified composition and which contains the following two types of oil phase as the oil phase, improves the feel of hair immediately after use: 1) an oil phase with an average particle size of 0.5 ?m or less, formed with a nonionic surfactant that is a solid at normal temperature and has a Krafft point of at least 40° C., and 2) an oil phase with an average particle size of 0.5 to 100 ?m, formed with a surfactant and/or an alkyl-modified carboxyvinyl polymer.Type: GrantFiled: May 26, 2004Date of Patent: May 8, 2012Assignee: Shiseido Co., Ltd.Inventors: Akira Ishikubo, Tomoyuki Kawasoe, Shunsuke Takeda
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Publication number: 20110294773Abstract: To provide a cosmetic composition and a hair wash which are excellent in metal pyrithione salt persistence after washing with a washing liquid containing a surfactant, etc. A cosmetic composition and a hair wash, which comprise a copolymer and a metal pyrithione salt, wherein the copolymer contains constituting units corresponding to a cationic vinyl monomer of a specific structure and constituting units corresponding to a nonionic vinyl monomer of a specific structure.Type: ApplicationFiled: August 12, 2011Publication date: December 1, 2011Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Akira ISHIKUBO, Shoya YODA
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Patent number: 7973085Abstract: A gel composition having the formula R1O-[(AO)k(EO)m(AO)n]-R2 comprises (a) 0.1 to 60 mass % of a block-type alkylene oxide derivative, (b) an oil, and (c) 0.1 to 10 mass % of water. AO represents a C3-C4 oxyalkylene group; EO represents an oxyethylene group; k and n represent average addition mole numbers of the oxyalkylene group and m represents average addition mole number of the oxyethylene group, 1?m?70 and 1?k+n?70. The oxyethylene group is 20 to 80 mass % with respect to the sum of the oxyalkylene group (AO) and the oxyethylene group. R1 and R2 may be identical to or different from one another and are each a C1-C4 hydrocarbon group or a hydrogen atom. The composition has a continuous phase comprising the oil; and the viscosity of the composition at 25° C. is 500 mPa·s or more.Type: GrantFiled: June 6, 2007Date of Patent: July 5, 2011Assignee: Shiseido Company Ltd.Inventors: Akira Ishikubo, Takashi Ohmori, Yuki Suzuki
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Publication number: 20110070173Abstract: This object of the invention is to provide an oil-in water emulsion cosmetic composition having fine sense of use and excellent dispersion stability, and does not occur twisting upon drying. In advance, a hydrophobicized powder is dispersed in an oil phase and processed with wet type disperser such as beads mill, dispersing solution is obtained. And then said dispersing solution and a water phase are processed with homomixer, an oil-in water emulsion composition having excellent sense of use and dispersibility of powder after applying to skin can be obtained. The dispersing stability of powder is extremely good by using a particular dispersant and a particular oil component. The dispersion stability of powder is further improved, and the precipitation and creaming of the emulsion particle can be solved by blending thickener having salt tolerance. Sticky feeling is solved by using succinoglycan as a thickener, and twisting is solved by plasticizing said succinoglycan.Type: ApplicationFiled: December 26, 2003Publication date: March 24, 2011Applicant: Shiseido Co., Ltd.Inventors: Susumu Yoshida, Tadashi Nakamura, Keiko Nakamura-Sole Heir, Akira Ishikubo, Akio Nasu
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Publication number: 20100297039Abstract: The present invention provides an oil-in-water emulsion composition having excellent emulsion stability, low sticky feeling, and low skin irritation. The oil-in-water emulsion composition according to the present invention comprises (a) 1 to 20 mass % of a powder component, (b) 0.001 to 0.5 mass % of a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component, having a structure that (a) powder particles are adsorbed on the oil droplets dispersed in the water phase, and containing substantively no surfactant other than the (b) cationic surfactant.Type: ApplicationFiled: April 25, 2008Publication date: November 25, 2010Applicant: SHISEIDO COMPANY LTD.Inventors: Akira Ishikubo, Yuji Matsushita, Yosuke Ikebe, Taizo Fujiyama, Tomonori Toyoda, Kazuho Koiwa