Patents Assigned to Mikuni Shikiso Kabushiki Kaisha
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Publication number: 20240030449Abstract: Provided is a production method of a coating composition for electrode, which is able to determine suitable conditions in a dispersion step of an electrode slurry for positive electrode for lithium ion battery, in terms of numerical values, and to enhance performances of the resulting battery. A production method of an electrode slurry for positive electrode for lithium ion secondary battery, including kneading at least a carbon material as an electroconductive material and a solvent into a dispersion, is disclosed. As for the carbon material-dispersed slurry, its alternating current impedance value immediately after the dispersion is controlled to a prescribed numerical value.Type: ApplicationFiled: May 30, 2023Publication date: January 25, 2024Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Kazuhiro TACHIBANA, Taizou HARUYAMA, Takuya KITAGAWA, Naoya KAWAMURA, Yasuhiro YAMAMOTO
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Publication number: 20240030448Abstract: An object of the present application is to provide a conductive material dispersion having excellent performance, and methods for manufacturing a positive electrode for a lithium ion secondary battery and a lithium ion secondary battery, using the conductive material dispersion. As a means for achieving the object, the conductive material dispersion contains at least a conductive material, a dispersion medium, a polyvinyl acetal-based resin, and a cellulose-based resin, wherein 10-200 parts by weight of the polyvinyl acetal-based resin is contained with respect to 100 parts by weight of the cellulose-based resin.Type: ApplicationFiled: March 6, 2021Publication date: January 25, 2024Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventor: Rie KAJIHARA
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Publication number: 20230386760Abstract: The present invention relates to a slurry for forming a semiconductor electrode layer to obtain a dye-sensitized solar cell containing a porous layer, which is not susceptible to cracking and is capable of providing a higher conversion efficiency. The slurry for forming a semiconductor electrode layer contains two types of metal-oxide semiconductor particles having different particle sizes. When a semiconductor electrode layer is formed by coating and sintering such a slurry, cracking seldom occurs and a higher conversion efficiency is achieved when it is made into a film with a thickness of 3˜20 ?m.Type: ApplicationFiled: August 7, 2023Publication date: November 30, 2023Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Sumiyo SHIMIZU, Taizou HARUYAMA
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Publication number: 20190221850Abstract: Provided is a production method of a coating composition for electrode, which is able to determine suitable conditions in a dispersion step of an electrode slurry for positive electrode for lithium ion battery, in terms of numerical values, and to enhance performances of the resulting battery. A production method of an electrode slurry for positive electrode for lithium ion secondary battery, including kneading at least a carbon material as an electroconductive material and a solvent into a dispersion, is disclosed. As for the carbon material-dispersed slurry, its alternating current impedance value immediately after the dispersion is controlled to a prescribed numerical value.Type: ApplicationFiled: March 25, 2019Publication date: July 18, 2019Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Kazuhiro Tachibana, Taizou Haruyama, Takuya Kitagawa, Naoya Kawamura, Yasuhiro Yamamoto
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Publication number: 20180122586Abstract: The present invention relates to a slurry for forming a semiconductor electrode layer to obtain a dye-sensitized solar cell containing a porous layer, which is not susceptible to cracking and is capable of providing a higher conversion efficiency. The slurry for forming a semiconductor electrode layer contains two types of metal-oxide semiconductor particles having different particle sizes. When a semiconductor electrode layer is formed by coating and sintering such a slurry, cracking seldom occurs and a higher conversion efficiency is achieved when it is made into a film with a thickness of 3˜20 ?m.Type: ApplicationFiled: December 17, 2015Publication date: May 3, 2018Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Sumiyo SHIMIZU, Taizou HARUYAMA
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Publication number: 20150311533Abstract: [Problem] Provided is a production method of a coating composition for electrode, which is able to determine suitable conditions in a dispersion step of an electrode slurry for positive electrode for lithium ion battery, in terms of numerical values, and to enhance performances of the resulting battery. [Solution] A production method of an electrode slurry for positive electrode for lithium ion secondary battery, including kneading at least a carbon material as an electroconductive material and a solvent into a dispersion, is disclosed. As for the carbon material-dispersed slurry, its alternating current impedance value immediately after the dispersion is controlled to a prescribed numerical value.Type: ApplicationFiled: September 13, 2013Publication date: October 29, 2015Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Kazuhiro TACHIBANA, Taizou HARUYAMA, Takuya KITAGAWA, Naoya KAWAMURA, Yasuhiro YAMAMOTO
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Patent number: 7858676Abstract: An aqueous pigment dispersion for ink jet having a pigment dispersed, characterized by containing a water-soluble resin and a resin having a urethane bond and/or an amide bond.Type: GrantFiled: December 14, 2007Date of Patent: December 28, 2010Assignees: Seiko Epson Corporation, Mikuni Shikiso Kabushiki KaishaInventors: Minoru Waki, Naoki Okamoto, Izumi Yasuda
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Publication number: 20100189625Abstract: [Problems] A carbon nanotube has a low apparent bulk density and therefore has serious problems in the workability upon use. Particularly when two or more types of carbon nanotubes are used together, the workability becomes more serious, and it is more difficult to exploit the properties of the carbon nanotubes. [Means for Solving the Problems] One or more types of carbon nanotubes are mixed and granulated. In this manner, it becomes possible to increase the apparent bulk density of a carbon nanotube, improve the workability of a carbon nanotube during the production of a resin master batch or a dispersion solution, and exploit the properties of a carbon nanotube satisfactorily.Type: ApplicationFiled: July 11, 2008Publication date: July 29, 2010Applicant: MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Hideyuki Hisashi, Tetsuji Kadowaki, Takefumi Nagata
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Patent number: 7524892Abstract: It is an object of the present invention to provide a pigment dispersion, an ink composition, and an ink set, enabling excellent glossiness, bronzing prevention, and ink composition storage stability to be realized. The present invention provides a pigment dispersion characterized by comprising at least a pigment, an aqueous medium, a copolymer resin between a hydrophobic monomer and a hydrophilic monomer, and a urethane resin, and also an ink composition characterized by containing at least the pigment dispersion and an aqueous medium, and an ink set characterized by comprising at least the ink composition.Type: GrantFiled: April 12, 2004Date of Patent: April 28, 2009Assignees: Seiko Epson Corporation, Mikuni Shikiso Kabushiki KaishaInventors: Shuichi Kataoka, Bunji Ishimoto, Akira Mizutani, Naoki Okamoto, Yoshiaki Miyazaki, Izumi Yasuda, Tomoyuki Shiraga
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Publication number: 20080108746Abstract: An aqueous pigment dispersion for ink jet having a pigment dispersed, characterized by containing a water-soluble resin and a resin having a urethane bond and/or an amide bond.Type: ApplicationFiled: December 14, 2007Publication date: May 8, 2008Applicants: Seiko Epson Corporation, MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Minoru Waki, Naoki Okamoto, Izumi Yasuda
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Patent number: 7348368Abstract: A pigment-dispersed aqueous recording liquid containing at least a pigment and a resin, which comprises from 60 to 200 parts by weight of the resin to 100 parts by weight of the pigment, wherein at least one of the resin is a water-dispersible urethane type resin, a weight fraction of a polyurethane urea part of which is at most 2.0 wt % to the urethane resin, and the pigment dispersed in the recording liquid has a dispersion particle size D50 of from 40 to 100 nm.Type: GrantFiled: March 3, 2004Date of Patent: March 25, 2008Assignees: Mitsubishi Chemical Corporation, Seiko Epson Corporation, Mikuni Shikiso Kabushiki KaishaInventors: Munetaka Kakiuchi, Shuichi Kataoka, Takashi Oyanagi, Kimihiko Ohya, Seiji Kamamasu
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Patent number: 7008994Abstract: A water-based pigment dispersion in which a pigment is dispersed with a water soluble or self-emulsifying thermoplastic resin containing carboxylic group, characterized in that the ratio of the pigment to the thermoplastic resin containing the carboxylic group (pigment/thermoplastic resin containing carboxylic group (weight ratio of effective solid matter)) is 10/10 to 10/1, the thermoplastic resin containing the carboxylic group is cross-linked with a cross-linking agent after the pigment is dispersed with the thermoplastic resin, and the ratio of the cross-linking agent to the thermoplastic resin containing the carboxylic group (cross-linking agent/thermoplastic resin containing carboxylic group (weight ratio of effective solid matter)) is 1/100 to 50/100; a process for preparing the same; and a water-based ink containing the same.Type: GrantFiled: April 13, 1999Date of Patent: March 7, 2006Assignee: Mikuni Shikiso Kabushiki KaishaInventor: Minoru Waki
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Publication number: 20040229976Abstract: A pigment-dispersed aqueous recording liquid containing at least a pigment and a resin, which comprises from 60 to 200 parts by weight of the resin to 100 parts by weight of the pigment, wherein at least one of the resin is a water-dispersible urethane type resin, a weight fraction of a polyurethane urea part of which is at most 2.0 wt % to the urethane resin, and the pigment dispersed in the recording liquid has a dispersion particle size D50 of from 40 to 100 nm.Type: ApplicationFiled: March 3, 2004Publication date: November 18, 2004Applicants: Seiko Epson Corporation, Mitsubishi Chemical Corporation, MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Munetaka Kakiuchi, Shuichi Kataoka, Takashi Oyanagi, Kimihiko Ohya, Seiji Kamamasu
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Patent number: 6806300Abstract: A water-based ink composition for ink-jet printing, containing at least pigment, a dispersing resin, a surface active agent, an organic solvent and water, in which the pigment is dispersed with the dispersing resin, characterized in that the dispersing resin comprises a copolymer (I) prepared by polymerizing a monomer mixture (I) containing a monomer (A) represented by the formula (I), a monomer (B) represented by the formula (II) and a monomer (C) represented by the formula (III) and a copolymer (II) prepared by polymerizing a monomer mixture (II) containing a monomer (D) represented by the formula (IV) and a monomer (E) represented by the formula (V).Type: GrantFiled: July 30, 2001Date of Patent: October 19, 2004Assignees: Mikuni Shikiso Kabushiki Kaisha, Seiko Epson CorporationInventors: Minoru Waki, Naoki Okamoto, Kazuaki Watanabe
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Publication number: 20040011429Abstract: A zinc phosphate-containing surface conditioning agent to be used for surface conditioning as pretreatment for zinc phosphate conversion coating of a metallic material, which contains from 500 to 20,000 ppm of zinc phosphate and which has a pH of from 3 to 11, wherein said zinc phosphate has an average particle size of at most 3 &mgr;m and D90 of at most 4 &mgr;m.Type: ApplicationFiled: June 12, 2003Publication date: January 22, 2004Applicants: Nippon Paint Co., Ltd., MIKUNI SHIKISO KABUSHIKI KAISHAInventors: Satoshi Miyamoto, Toshiko Nakazawa, Daisuke Fujimoto
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Publication number: 20020035172Abstract: A water-based ink composition for ink-jet printing, containing at least pigment, a dispersing resin, a surface active agent, an organic solvent and water, in which the pigment is dispersed with the dispersing resin, characterized in that the dispersing resin comprises a copolymer (I) prepared by polymerizing a monomer mixture (I) containing a monomer (A) represented by the formula (I), a monomer (B) represented by the formula (II) and a monomer (C) represented by the formula (III) and a copolymer (II) prepared by polymerizing a monomer mixture (II) containing a monomer (D) represented by the formula (IV) and a monomer (E) represented by the formula (V).Type: ApplicationFiled: July 30, 2001Publication date: March 21, 2002Applicant: Mikuni Shikiso Kabushiki KaishaInventors: Minoru Waki, Naoki Okamoto, Kazuaki Watanabe
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Patent number: 5417747Abstract: A waterbased ink composition for ink-jet printing including a pigment, an aqueous medium and a monoterpene or sesquiterpene excellent in coloring property and water resistance, which does not stop up the nozzle nor feather, and by which the stable printed images can be continuously formed without any distortion.Type: GrantFiled: January 19, 1994Date of Patent: May 23, 1995Assignee: Mikuni Shikiso Kabushiki KaishaInventors: Satoru Arata, Issei Kawabata, Yoshihiko Uchioki