Patents by Inventor Takaaki Kurata
Takaaki Kurata 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).
-
Patent number: 10899153Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.Type: GrantFiled: November 15, 2016Date of Patent: January 26, 2021Assignee: Nippon Kayaku Kabushiki KaishaInventors: Tsunetoshi Egusa, Takashi Fujii, Hiroyuki Tsukui, Takaaki Kurata
-
Patent number: 10780724Abstract: To provide a heat-sensitive recording material which produces images with excellent resistance to water, while producing background with resistance to heat. A heat-sensitive recording material which is characterized by containing at least one compound represented by general formula (1) as a color-developing compound: wherein, R1-R5 each independently represents a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group or an arylamino group.Type: GrantFiled: December 22, 2016Date of Patent: September 22, 2020Assignee: Nippon Kayaku Kabushiki KaishaInventors: Kyohei Miyanaga, Takaaki Kurata
-
Patent number: 10343438Abstract: This heat-sensitive recording material is configured to contain, as a color-developing compound, at least one compound represented by one of formulas (1)-(3):Type: GrantFiled: September 30, 2015Date of Patent: July 9, 2019Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takaaki Kurata, Kyohei Miyanaga
-
Publication number: 20180345710Abstract: To provide a heat-sensitive recording material which produces images with excellent resistance to water, while producing background with resistance to heat. A heat-sensitive recording material which is characterized by containing at least one compound represented by general formula (1) as a color-developing compound: wherein, R1-R5 each independently represents a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group or an arylamino group.Type: ApplicationFiled: December 22, 2016Publication date: December 6, 2018Inventors: Kyohei Miyanaga, Takaaki Kurata
-
Publication number: 20180312465Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.Type: ApplicationFiled: November 15, 2016Publication date: November 1, 2018Inventors: Tsunetoshi Egusa, Takashi Fujii, Hiroyuki Tsukui, Takaaki Kurata
-
Publication number: 20170297355Abstract: This heat-sensitive recording material is configured to contain, as a color-developing compound, at least one compound represented by one of formulas (1)-(3):Type: ApplicationFiled: September 30, 2015Publication date: October 19, 2017Inventors: Takaaki Kurata, Kyohei Miyanaga
-
Patent number: 9663688Abstract: The present invention relates to an ultraviolet-curable adhesive to be used for laminating a first optical base material and a second optical base material having a light-shielding portion on a surface thereof to each other, the ultraviolet-curable adhesive containing (A) a specified compound represented by the following formula (1), (B) a photopolymerizable compound, and (C) a photopolymerization initiator; a cured product obtained by irradiating the adhesive with an ultraviolet ray; and an optical member having the cured product, such as a touch panel:Type: GrantFiled: October 25, 2012Date of Patent: May 30, 2017Assignee: NipponKayaku KabushikiKaishaInventors: Hayato Motohashi, Daisuke Kobayashi, Yuichiro Matsuo, Takaaki Kurata, Masahiro Naitou
-
Publication number: 20150044479Abstract: The present invention relates to an ultraviolet-curable adhesive to be used for laminating a first optical base material and a second optical base material having a light-shielding portion on a surface thereof to each other, the ultraviolet-curable adhesive containing (A) a specified compound represented by the following formula (1), (B) a photopolymerizable compound, and (C) a photopolymerization initiator; a cured product obtained by irradiating the adhesive with an ultraviolet ray; and an optical member having the cured product, such as a touch panel:Type: ApplicationFiled: October 25, 2012Publication date: February 12, 2015Applicant: Nippon Kayaku KabushikiKaishaInventors: Hayato Motohashi, Daisuke Kobayashi, Yuichiro Matsuo, Takaaki Kurata, Masahiro Naitou
-
Publication number: 20140356591Abstract: The present invention relates to: an ultraviolet-curable adhesive to be used for laminating a first optical base material and a second optical base material having a light-shielding portion on a surface thereof to each other, the ultraviolet-curable adhesive comprising (A) an organic compound capable of absorbing an ultraviolet ray to emit light and having a specified light absorption wavelength and a specified light emission maximum wavelength, (B) a photopolymerizable compound, and (C) a photopolymerization initiator; a cured product obtained by irradiating the adhesive with an ultraviolet ray; and an optical member comprising the cured product, such as a touch panel.Type: ApplicationFiled: October 25, 2012Publication date: December 4, 2014Applicant: Nippon Kayaku KabushikiKaishaInventors: Hayato Motohashi, Daisuke Kobayashi, Yuichiro Matsuo, Takaaki Kurata, Masahiro Naitou
-
Publication number: 20140320770Abstract: The present invention relates to: an ultraviolet-curable adhesive to be used for laminating a first optical base material and a second optical base material having a light-shielding portion on a surface thereof to each other, the ultraviolet-curable adhesive containing (A) a compound capable of absorbing an ultraviolet ray to emit light, (B) a photopolymerizable compound, and (C) a photopolymerization initiator; a cured product obtained by irradiating the adhesive with an ultraviolet ray; and an optical member having the cured product, such as a touch panel.Type: ApplicationFiled: October 25, 2012Publication date: October 30, 2014Inventors: Hayato Motohashi, Daisuke Kobayashi, Masahiro Naitou, Takaaki Kurata, Yuichiro Matsuo
-
Patent number: 8212974Abstract: Disclosed is a dye-containing blue color composition for color filter, including a triarylmethane-based dye having a structure represented by the following formula (1): wherein R1, R2, R3, R4, R5 and R6 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may have a substituent, a phenyl group which may have a substituent or a benzyl group which may have a substituent, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 and R20 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may have a substituent or a halogen atom and X represents a tristrifluoromethanesulfonylmethide anion.Type: GrantFiled: April 22, 2010Date of Patent: July 3, 2012Assignees: Toppan Printing Co., Ltd., Nippon Kayaku Kabushiki KaishaInventors: Satoshi Ohkuma, Noriko Asahi, Takashi Yamauchi, Yasuyuki Demachi, Takaaki Kurata, Yutaka Ishii, Yoshiki Akatani
-
Patent number: 7901497Abstract: The present invention relates to an aqueous solution composition (water-based ink composition) containing a water-soluble naphthalocyanine coloring matter represented by the following formula (1): wherein, M represents a hydrogen atom, a metal atom, a metal oxide, a metal hydroxide or a metal halide, X represents a carbonyl group or a sulfonyl group, W1 to W4 are each independently a hydrogen atom, an ionic hydrophilic group or the like, at least one of W1 to W4 is a group other than a hydrogen atom, and n represents an integer number of 1 to 24, respectively, or a salt thereof, and a novel naphthalocyanine coloring matter, and said compound is useful as a near-infrared ray absorbent because it has a high absorption in the near-infrared region, and it is useful as a near-infrared ray absorbing water-based ink because it has an excellent storage stability in aqueous solution.Type: GrantFiled: October 30, 2008Date of Patent: March 8, 2011Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takaaki Kurata, Takashi Yoneda, Takafumi Fujii, Tadayuki Kiyoyanagi, Koji Hirota
-
Publication number: 20100271578Abstract: Disclosed is a dye-containing blue color composition for color filter, including a triarylmethane-based dye having a structure represented by the following formula (1): wherein R1, R2, R3, R4, R5 and R6 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may have a substituent, a phenyl group which may have a substituent or a benzyl group which may have a substituent, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 and R20 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may have a substituent or a halogen atom and X represents a tristrifluoromethanesulfonylmethide anion.Type: ApplicationFiled: April 22, 2010Publication date: October 28, 2010Applicants: TOPPAN PRINTING CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHAInventors: Satoshi Ohkuma, Noriko Asahi, Takashi Yamauchi, Yasuyuki Demachi, Takaaki Kurata, Yutaka Ishii, Yoshiki Akatani
-
Publication number: 20100236448Abstract: The present invention relates to an aqueous solution composition (water-based ink composition) containing a water-soluble naphthalocyanine coloring matter represented by the following formula (1): (wherein, M represents a hydrogen atom, a metal atom, a metal oxide, a metal hydroxide or a metal halide, X represents a carbonyl group or a sulfonyl group, W1 to W4 are each independently a hydrogen atom, an ionic hydrophilic group or the like, at least one of W1 to W4 is a group other than a hydrogen atom, and n represents an integer number of 1 to 24, respectively) or a salt thereof, and a novel naphthalocyanine coloring matter; and said compound is useful as a near-infrared ray absorbent because it has a high absorption in the near-infrared region, and it is useful as an near-infrared ray absorbing water-based ink because it has an excellent storage stability in aqueous solution.Type: ApplicationFiled: October 30, 2008Publication date: September 23, 2010Applicant: Nippon Kayaku Kabushiki KaishaInventors: Takaaki Kurata, Takashi Yoneda, Takafumi Fujii, Tadayuki Kiyoyanagi, Koji Hirota
-
Patent number: 7521006Abstract: Disclosed is a near-infrared absorbing compound which does not contain antimony or arsenic, and has excellent stability, especially excellent heat resistance, light resistance and moist heat resistance. Also disclosed are a near-infrared absorbing filter, which is produced by using the near-infrared absorbing compound, and has excellent resistance such as light resistance and heat resistance, an optical filter and an optical recording medium. Specifically disclosed are a diimmonium compound represented by the formula (1) below and a near-infrared absorbing filter obtained by using such a diimmonium compound. Further specifically disclosed are a near-infrared absorbing filter wherein an adhesive layer containing the diimmonium compound is arranged on a transparent supporting body, and an optical filter using such a near-infrared absorbing filter.Type: GrantFiled: September 2, 2005Date of Patent: April 21, 2009Assignee: Nippon Kayaku Kabushiki KaishaInventors: Masaaki Ikeda, Takaaki Kurata, Syouichi Kaneko, Junichi Segawa
-
Patent number: 7494721Abstract: The device according to the invention is a device having organic thin films containing a light-emitting layer between an anode and a cathode that emits light by application of electric energy, characterized in that the light-emitting device contains at least a compound having the basic skeleton represented by the following General Formula (1) or (2). Use of the condensed polycyclic compound according to the invention allows production of high-brightness, high-efficiency light-emitting device superior in color purity.Type: GrantFiled: January 16, 2004Date of Patent: February 24, 2009Assignee: Nippon Kayaku Kabushiki KaishaInventors: Masaaki Ikeda, Takaaki Kurata, Teppei Tsuchida, Chihaya Adachi
-
Publication number: 20080067478Abstract: Disclosed is a near-infrared absorbing compound which does not contain antimony or arsenic, and has excellent stability, especially excellent heat resistance, light resistance and moist heat resistance. Also disclosed are a near-infrared absorbing filter, which is produced by using the near-infrared absorbing compound, and has excellent resistance such as light resistance and heat resistance, an optical filter and an optical recording medium. Specifically disclosed are a diimmonium compound represented by the formula (1) below and a near-infrared absorbing filter obtained by using such a diimmonium compound. Further specifically disclosed are a near-infrared absorbing filter wherein an adhesive layer containing the diimmonium compound is arranged on a transparent supporting body, and an optical filter using such a near-infrared absorbing filter.Type: ApplicationFiled: September 2, 2005Publication date: March 20, 2008Inventors: Masaaki Ikeda, Takaaki Kurata, Syouichi Kaneko, Junichi Segawa
-
Publication number: 20060051612Abstract: The device according to the invention is a device having organic thin films containing a light-emitting layer between an anode and a cathode that emits light by application of electric energy, characterized in that the light-emitting device contains at least a compound having the basic skeleton represented by the following General Formula (1) or (2). Use of the condensed polycyclic compound according to the invention allows production of high-brightness, high-efficiency light-emitting device superior in color purity.Type: ApplicationFiled: January 16, 2004Publication date: March 9, 2006Inventors: Masaaki Ikeda, Takaaki Kurata, Teppei Tsuchida, Chihaya Adachi
-
Publication number: 20050148786Abstract: To provide a near-IR absorption compound free from antimony or arsenic and excellent in stability, especially, in heat resistance, light fastness, and moisture-and-heat resistance and also an IR absorption filter, an optical information recording medium, and a resin composition excellent in durability by using the near-IR absorption compound. The near-IR absorption compound is a diimmonium compound having the following structure and the resin composition contains the diimmonium compound: (wherein R1 to R8 independently denote hydrogen atom or an optionally substituted aliphatic hydrocarbon group; R9 and R10 independently denote an aliphatic hydrocarbon group optionally containing a halogen atom; and rings A and B may further have substituent groups.).Type: ApplicationFiled: October 22, 2004Publication date: July 7, 2005Inventors: Masaaki Ikeda, Takaaki Kurata, Toshitaka Toriniwa