Patents by Inventor Kazunori Shigemori
Kazunori Shigemori 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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Publication number: 20210380743Abstract: An ultraviolet-ray absorbing polymer containing a monomer unit represented by general formula (12) below and a monomer unit derived from a monomer represented by general formula (1) below. In general formula (12), R6 represents any one selected from a group consisting of a hydrogen atom and a methyl group, U represents a hydrocarbon group, and the hydrocarbon group includes a skeleton absorbing ultraviolet rays and optionally contains a heteroatom. In general formula (1), R16 represents any one selected from a group consisting of a hydrogen atom and a methyl group, and Z represents any one selected from a group consisting of a chain hydrocarbon group having 10 or more carbon atoms and a polycyclic hydrocarbon group having 10 or more carbon atoms.Type: ApplicationFiled: August 18, 2021Publication date: December 9, 2021Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYOCOLOR CO., LTD.Inventors: Akio HIMIZU, Keisuke MASUKO, Joji MIKAMI, Takeshi NISHINAKA, Tomoyuki AOTANI, Kazunori SHIGEMORI, Motoki TANAKA, Hiroyuki HAYASHI
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Patent number: 9732240Abstract: Provided is an inkjet pigment ink which contains a pigment that is selected from the group consisting of C.L. Pigment Yellow 74 having a transmittance of 70% or more, C.I. Pigment Red 269 having a transmittance of 70% or more, C.I. Pigment Red 122 having a transmittance of less than 70% and C.I. Pigment Yellow 150; a water-soluble solvent that is selected from the group consisting of glycol ethers and diols; water; and a pigment dispersing resin that is a copolymer which contains a monomer A, a monomer B and a monomer C as unit components. The monomer A is an alkyl (meth)acrylate ester; the monomer B is styrene, ?-methyl styrene or benzyl (meth)acrylate; and the monomer C is (meth)acrylic acid.Type: GrantFiled: March 9, 2012Date of Patent: August 15, 2017Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Kazunori Shigemori, Natsuko Kokubo, Joji Mikami, Masayoshi Utsugi, Yasutaka Itimura, Satoshi Washio, Yukitoshi Takahashi, Atsushi Yoda, Masahiro Sugihara
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Publication number: 20150353749Abstract: The present invention relates to a pigment ink composition that can fulfill excellent print stability, and performances and drying performance of printed matters. The ink composition comprises: at least a pigment; an organic solvent; and two or more kinds of binder resins having different weight average molecular weights (Mw), wherein, when a binder resin having lowest weight average molecular weight (Mw) is marked as ?, and a binder resin having higher weight average molecular weight (Mw) than that of the binder resin ? and meeting formula (3) is marked as ? among the two or more kinds of binder resins to be used, the ink composition meets formulae (1) and (2): Formula (1): Mw??Mw??10,000, Formula (2): 1,000<Mw?<30,000, and Formula (3): 20,000<Mw?<100,000, wherein Mw? represents the weight average molecular weight of the binder resin ?, and Mw? represents the weight average molecular weight of the binder resin ?.Type: ApplicationFiled: August 21, 2015Publication date: December 10, 2015Applicant: TOYO INK SC HOLDINGS CO., LTD.Inventors: Atsushi YODA, Seiji Aida, Ken Yamasaki, Daisuke Fujiwara, Kouhei Yamada, Kazunori Shigemori, Mitsuo Umezawa
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Publication number: 20140066550Abstract: Provided is an inkjet pigment ink which contains a pigment that is selected from the group consisting of C.L. Pigment Yellow 74 having a transmittance of 70% or more, C.I. Pigment Red 269 having a transmittance of 70% or more, C.I. Pigment Red 122 having a transmittance of less than 70% and C.I. Pigment Yellow 150; a water-soluble solvent that is selected from the group consisting of glycol ethers and diols; water; and a pigment dispersing resin that is a copolymer which contains a monomer A, a monomer B and a monomer C as unit components. The monomer A is an alkyl (meth)acrylate ester; the monomer B is styrene, ?-methyl styrene or benzyl (meth)acrylate; and the monomer C is (meth)acrylic acid.Type: ApplicationFiled: March 9, 2012Publication date: March 6, 2014Applicants: TOYO INK CO., LTD., TOYO INK SC HOLDINGS CO., LTD.Inventors: Kazunori Shigemori, Natsuko Kokubo, Joji Mikami, Masataka Utsugi, Yasutaka Itimura, Satoshi Washio, Yukitoshi Takahashi, Atsushi Yoda, Masahiro Sugihara
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Patent number: 8344047Abstract: A dispersing agent characterized in that said dispersing agent is prepared by reacting primary and/or secondary amino groups of an amine compound comprising a polyamine (C) with isocyanate groups of a urethane prepolymer (E) having two isocyanate groups in one terminal region, wherein said urethane prepolymer (E) has been prepared by reacting hydroxyl groups in a vinyl polymer (A) having two hydroxyl groups in one terminal region with isocyanate groups in diisocyanates (B), and in that an amine number of said dispersing agent is 1 to 100 mgKOH/g is disclosed. The dispersing agent of the present invention has excellent dispersibility, flowability, and storage stability when used in small quantities. A pigment-dispersed product can be prepared therefrom, independently of the kinds of binder resin or solvent used. Further, the present invention is suitable for offset ink, gravure ink, resist ink for a color filter, inkjet ink, coating composition, and colored resin composition.Type: GrantFiled: March 24, 2009Date of Patent: January 1, 2013Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Kazunori Shigemori, Tomoko Tachibana, Yasushi Ariyoshi, Ken Yamazaki, Atsushi Yoda, Daisuke Fujiwara, Atsushi Nakazato, Tsutomu Hiroshima
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Publication number: 20110230603Abstract: The present invention relates to a pigment ink composition that can fulfill excellent print stability, and performances and drying performance of printed matters. The ink composition comprises: at least a pigment; an organic solvent; and two or more kinds of binder resins having different weight average molecular weights (Mw), wherein, when a binder resin having lowest weight average molecular weight (Mw) is marked as ?, and a binder resin having higher weight average molecular weight (Mw) than that of the binder resin ? and meeting formula (3) is marked as ? among the two or more kinds of binder resins to be used, the ink composition meets formulae (1) and (2): Formula (1): Mw??Mw??10,000, Formula (2): 1,000<Mw?<30,000, and Formula (3): 20,000<Mw?<100,000, wherein Mw? represents the weight average molecular weight of the binder resin ?, and Mw? represents the weight average molecular weight of the binder resin ?.Type: ApplicationFiled: September 4, 2009Publication date: September 22, 2011Applicant: TOYO INK MFG. CO., LTD.Inventors: Atsushi Yoda, Seiji Aida, Ken Yamasaki, Daisuke Fujiwara, Kouhei Yamada, Kazunori Shigemori, Mitsuo Umezawa
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Publication number: 20110021675Abstract: A dispersing agent characterized in that said dispersing agent is prepared by reacting primary and/or secondary amino groups of an amine compound comprising a polyamine (C) with isocyanate groups of a urethane prepolymer (E) having two isocyanate groups in one terminal region, wherein said urethane prepolymer (E) has been prepared by reacting hydroxyl groups in a vinyl polymer (A) having two hydroxyl groups in one terminal region with isocyanate groups in diisocyanates (B), and in that an amine number of said dispersing agent is 1 to 100 mgKOH/g is disclosed. The dispersing agent of the present invention has excellent dispersibility, flowability, and storage stability when used in small quantities. A pigment-dispersed product can be prepared therefrom, independently of the kinds of binder resin or solvent used. Further, the present invention is suitable for offset ink, gravure ink, resist ink for a color filter, inkjet ink, coating composition, and colored resin composition.Type: ApplicationFiled: March 24, 2009Publication date: January 27, 2011Applicant: TOYO INK MANUFACTURING CO., LTD.Inventors: Kazunori Shigemori, Tomoko Tachibana, Yasushi Ariyoshi, Ken Yamazaki, Atsushi Yoda, Daisuke Fujiwara, Atsushi Nakazato, Tsutomu Hiroshima
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Patent number: 7811738Abstract: In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 ?m, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of ?15 to 10° C. and a width at half maximum of at least 25° C. in viscoelasticity tan ?, the toner has a volume average particle diameter of 4 to 10 ?m and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 ?C/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.Type: GrantFiled: May 31, 2005Date of Patent: October 12, 2010Assignees: Zeon Corporation, Toyo Tire & Rubber Co., Ltd., Yamanashi Electronics Co., Ltd., Shin-Etsu Polymer Co., Ltd.Inventors: Kazunori Shigemori, Muneharu Ito, Toshiyuki Nagai, Toshiro Murano, Fuminori Tsuruta, Tomoharu Takeuchi, Masahiro Ikeda, Sokuei Motoda
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Publication number: 20070217820Abstract: In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 ?m, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of ?15 to 10° C. and a width at half maximum of at least 25° C. in viscoelasticity tan ?, the toner has a volume average particle diameter of 4 to 10 ?m and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 ?C/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.Type: ApplicationFiled: May 31, 2005Publication date: September 20, 2007Applicants: ZEON CORPORATION, TOYO TIRE & RUBBER CO., LTD., YAMANASHI ELECTRONICS CO., LTD., SHIN-ETSU POLYMER CO., LTD.Inventors: Kazunori Shigemori, Muneharu Ito, Toshiyuki Nagai, Toshiro Murano, Fuminori Tsuruta, Tomoharu Takeuchi, Masahiro Ikeda, Sokuei Motoda
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Patent number: 6740463Abstract: A method of producing a toner having a process of mixing colored particles and outer-additives by using a mixer with an agitating blade whose shaft portion is sealed with a gas having a flow rate of from 0.4 m3/hr to 3 m3/hr and which rotates at such a high speed as a peripheral speed at a tip of said agitating blade in a range of from 20 m/sec to 50 m/sec. When the colored particles and outer-additives are mixed with each other, there is no generation of aggregates thereby and the toner can be obtained at a high yield. Therefore the toner which hardly generates a white streak and fog, even after a long period of continuous operation of development of electrophotographs is performed, can be obtained.Type: GrantFiled: June 19, 2002Date of Patent: May 25, 2004Assignee: Zeon CorporationInventors: Kazunori Shigemori, Hidetoshi Azuma, Yoshihiro Makuta, Hirosi Yamamoto, Nobuyasu Ota, Kazuhiro Sato, Ryuji Ota
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Publication number: 20030225239Abstract: This invention provides a Michael addition type urethane urea made from starting materials including a polyol (a), a polyisocyanate (b), a polyamine (c) and an unsaturated compound (d), and comprising a bonded portion represented by the following formula (1-1) or (1-2): 1Type: ApplicationFiled: April 10, 2003Publication date: December 4, 2003Applicant: TOYO INK MANUFACTURING CO., LTD.Inventors: Naotoshi Nakamura, Kazunori Shigemori, Tsukasa Otsuki, Yukifumi Mashimo, Miki Kawashima, Akira Ikeda, Toshiaki Sato, Hiroshi Saito
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Publication number: 20030049559Abstract: A method of producing a toner having a process of mixing colored particles and outer-additives by using a mixer with an agitating blade whose shaft portion is sealed with a gas having a flow rate of from 0.4 m3/hr to 3 m3/hr and which rotates at such a high speed as a peripheral speed at a tip of said agitating blade in a range of from 20 m/sec to 50 m/sec. When the colored particles and outer-additives are mixed with each other, there is no generation of aggregates thereby and the toner can be obtained at a high yield. Therefore the toner which hardly generates a white streak and fog, even after a long period of continuous operation of development of electrophotographs is performed, can be obtained.Type: ApplicationFiled: June 19, 2002Publication date: March 13, 2003Inventors: Kazunori Shigemori, Hidetoshi Azuma, Yoshihiro Makuta, Hirosi Yamamoto, Nobuyasu Ota, Kazuhiro Sato, Ryuji Ota
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Patent number: 5741618Abstract: A process for producing a polymer toner comprises the steps of pouring a polymerizable monomer composition containing at least a polymerizable monomer and a colorant, but containing no oil-soluble polymerization initiator into an aqueous dispersion medium containing a dispersing agent; adding an oil-soluble polymerization initiator to the polymerizable monomer composition while stirring the composition to form primary droplets thereof, thereby bringing the droplets of the polymerizable monomer composition into contact with droplets of the oil-soluble polymerization initiator to form droplets of a polymerizable monomer composition containing the oil-soluble polymerization initiator; further continuing the stirring to form secondary droplets having desired droplet sizes; and then conducting suspension polymerization of the polymerizable monomer composition.Type: GrantFiled: October 10, 1996Date of Patent: April 21, 1998Assignee: Nippon Zeon Co. Ltd.Inventors: Kazunori Shigemori, Tokudai Ogawa
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Patent number: 5716748Abstract: The invention provides a developer comprising toner particles and a finely particulate polymer, wherein the finely particulate polymer is a finely particulate polymer of core-shell structure, which has a core part formed of a vinyl aromatic hydrocarbon polymer and a shell part formed of a (meth)acrylic ester polymer, and is obtained by a soap-free emulsion polymerization process. The developer has stable flowability and charging properties. The invention also provides such a finely particulate polymer and a preparation process thereof.Type: GrantFiled: July 26, 1996Date of Patent: February 10, 1998Assignee: Nippon Zeon Co., Ltd.Inventors: Jun Hasegawa, Katsuhiro Imai, Nobuyasu Ota, Kazunori Shigemori
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Patent number: 5328792Abstract: A non-magnetic one-component developer comprises a binder resin and a colorant, and has a volume-average particle diameter (dv) in a range of 5-15 .mu.m, a ratio (dv/dn) of the volume-average particle diameter (dv) to the number-average particle diameter (dn) in a range of 1.00-1.40, a quotient (Sc/Sr) obtained by dividing the area (Sc) of a circle supposing the absolute maximum length of a particle is a diameter by the real projected area (Sr) of the particle in a range of 1.00-1.30, a product (AxdnxD) of the specific surface area (A) (m.sup.2 /g) as measured in accordance with the BET method, the number-average particle diameter (dn) (.mu.m) and the true specific gravity (D) in a range of 5-10, and a ratio (Q/A) of the charge level (Q) (.mu.c/g) to the specific surface area (A) in a range of 80-150. The developer is substantially spherical from both conditions of Sc/Sr and AxdnxD, and is suitable for use in a development process in which cleaning is conducted at the same time as development.Type: GrantFiled: July 13, 1992Date of Patent: July 12, 1994Assignee: Nippon Zeon Co., Ltd.Inventors: Kazunori Shigemori, Katsuhiro Hasegawa, Jun Saito
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Patent number: 4725534Abstract: A process for producing a heat-developable photosensitive material containing fine photosensitive silver halide particles having a uniform particle form and particle size, said silver halide being prepared by reacting a silver salt of an organic fatty acid stoichiometrically with an inorganic or organic halogen compound.Type: GrantFiled: February 26, 1985Date of Patent: February 16, 1988Assignee: Oriental Photo Industrial Co., Ltd.Inventors: Kenji Kagami, Kenichi Nishio, Yukio Takegawa, Kazunori Shigemori