Patents by Inventor Yoshimi Midorikawa
Yoshimi Midorikawa 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: 11945249Abstract: The present invention provides a thermosensitive recording medium having a high degree of water resistance and excellent surface qualities. The thermosensitive recording medium has a thermosensitive recording layer comprising a colorless or pale colored basic leuco dye and an electron accepting developing agent on a substrate, but does not have a protective layer on the thermosensitive recording layer, and the thermosensitive recording layer further comprises (i) a carboxy-modified polyvinyl alcohol as a binder, (ii) an epichlorohydrin resin and a modified polyamine/amide resin (excluding those contained in the category of epichlorohydrin resin) as crosslinking agents, and (iii) an acrylic resin with a glass transition temperature (Tg) of lower than or equal to 50 degree C. and a minimum film forming temperature (MFT) of higher than or equal to 40 degree C.Type: GrantFiled: February 25, 2020Date of Patent: April 2, 2024Assignee: NIPPON PAPER INDUSTRIES CO., LTD.Inventors: Kentaro Kawasaki, Yoshimi Midorikawa, Kenji Hirai
-
Patent number: 11912052Abstract: Provided is a thermosensitive recording medium having excellent oil resistance among various performances required for the thermosensitive recording medium. The thermosensitive recording medium has a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains N-[2-(3-phenylureido)phenyl] benzenesulfonamide and an urea-based compound represented by the general formula 1 as the electron accepting color developing agents, wherein R1 represents a substituted or unsubstituted alkyl group, aralkyl group or aryl group, and R2 represents a hydrogen atom or an alkyl group.Type: GrantFiled: November 11, 2020Date of Patent: February 27, 2024Inventors: Kentaro Kawasaki, Yuka Murata, Kenji Hirai, Yoshimi Midorikawa
-
Publication number: 20230144275Abstract: Provided is a thermosensitive recording medium being excellent in oil resistance among various performances required for the thermosensitive recording medium, and being further excellent in heat resistance, plasticizer resistance, and printing (recording) run-ability. That is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains at least two kinds of urea compounds. The two kinds of urea compounds comprise the first urea compound being represented by the following general formula 1, and the second urea compound being represented by the following general formula 2.Type: ApplicationFiled: February 8, 2021Publication date: May 11, 2023Inventors: Kenji Hirai, Kentaro Kawasaki, Yuka Murata, Yoshimi Midorikawa
-
Publication number: 20230027721Abstract: Provided is a thermosensitive recording medium having a sufficient water resistance to moisture and humidity, such as for outdoor use in rainy weather and the like, and also having a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like. As the protective layer comprises a specific silane-modified acrylic resin which is an aqueous emulsion of core-shell type p articles, in a thermosensitive recording medium having a thermosensitive recording layer on a substrate and a protective layer on the thermosensitive recording layer, the thermosensitive re cording medium has a sufficient water resistance and also has a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like.Type: ApplicationFiled: December 8, 2020Publication date: January 26, 2023Inventors: Kenji Hirai, Yoshimi Midorikawa, Yuka Murata, Kentaro Kawasaki
-
Publication number: 20220410610Abstract: Provided is a thermosensitive recording medium having excellent oil resistance among various performances required for the thermosensitive recording medium. The thermosensitive recording medium has a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains N-[2-(3-phenylureido)phenyl] benzenesulfonamide and an urea-based compound represented by the general formula 1 as the electron accepting color developing agents, wherein R1 represents a substituted or unsubstituted alkyl group, aralkyl group or aryl group, and R2 represents a hydrogen atom or an alkyl group.Type: ApplicationFiled: November 11, 2020Publication date: December 29, 2022Inventors: Kentaro Kawasaki, Yuka Murata, Kenji Hirai, Yoshimi Midorikawa
-
Publication number: 20220161588Abstract: The present invention provides a thermosensitive recording medium having a high degree of water resistance and excellent surface qualities. The thermosensitive recording medium has a thermosensitive recording layer comprising a colorless or pale colored basic leuco dye and an electron accepting developing agent on a substrate, but does not have a protective layer on the thermosensitive recording layer, and the thermosensitive recording layer further comprises (i) a carboxy-modified polyvinyl alcohol as a binder, (ii) an epichlorohydrin resin and a modified polyamine/amide resin (excluding those contained in the category of epichlorohydrin resin) as crosslinking agents, and (iii) an acrylic resin with a glass transition temperature (Tg) of lower than or equal to 50 degree C. and a minimum film forming temperature (MFT) of higher than or equal to 40 degree C.Type: ApplicationFiled: February 25, 2020Publication date: May 26, 2022Inventors: Kentaro KAWASAKI, Yoshimi MIDORIKAWA, Kenji HIRAI
-
Publication number: 20200406658Abstract: Provided is a thermosensitive recording medium, which is excellent in color developing property, especially excellent in bar code readability, under severe environment, further, excellent in resistance to discoloration under severe environment. That is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer comprises, as the electron accepting color developing agent, a specific sulfone compound and a phenolic compound in a specific ratio, wherein the phenolic compound contains two or more hydroxyl groups and two or more diphenylsulfone backbone but contains neither urethane bond nor urea bond. The thermosensitive recording layer optionally may further comprise a specific urea-urethane-based compound.Type: ApplicationFiled: March 1, 2019Publication date: December 31, 2020Inventors: Kenji Hirai, Koji Kutsuwa, Yoshimi Midorikawa
-
Patent number: 10513137Abstract: The objective of the present invention is to provide a thermosensitive recording medium excellent in color developing property, especially excellent in bar code readability, under severe environment. Provided is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains a specific sulfone compound and a specific urea-urethane-based compound in a specific ratio.Type: GrantFiled: June 16, 2016Date of Patent: December 24, 2019Assignee: Nippon Paper Industries Co., Ltd.Inventors: Yasuaki Matsumori, Akihito Ogino, Yoshimi Midorikawa
-
Publication number: 20180178570Abstract: The objective of the present invention is to provide a thermosensitive recording medium excellent in color developing property, especially excellent in bar code readability, under severe environment. Provided is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains a specific sulfone compound and a specific urea-urethane-based compound in a specific ratio.Type: ApplicationFiled: June 16, 2016Publication date: June 28, 2018Inventors: Yasuaki Matsumori, Akihito Ogino, Yoshimi Midorikawa
-
Patent number: 9579916Abstract: The purpose of the present invention is to provide a thermosensitive recording medium with an increased gloss in the blank and printed portions, excellent color developing sensitivity and excellent printing run-ability, particularly excellent printing run-ability at high-speed printing. Provided is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored basic leuco dye and an electron accepting color developing agent, an intermediate layer and a gloss layer as an outermost layer in this order on a substrate, wherein the intermediate layer is formed by containing a carboxyl group-containing resin and the gloss layer is formed by containing a long chain alkyl group-containing resin and an emulsion type silicone copolymer resin.Type: GrantFiled: September 25, 2014Date of Patent: February 28, 2017Assignee: Nippon Paper Industries Co., Ltd.Inventors: Yasuaki Matsumori, Akihito Ogino, Yoshimi Midorikawa, Yoshihide Watanabe
-
Publication number: 20160236497Abstract: The purpose of the present invention is to provide a thermosensitive recording medium with an increased gloss in the blank and printed portions, excellent color developing sensitivity and excellent printing run-ability, particularly excellent printing run-ability at high-speed printing. Provided is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored basic leuco dye and an electron accepting developing agent, an intermediate layer and a gloss layer as an outermost layer in this order on a substrate, wherein the intermediate layer is formed by containing a carboxyl group-containing resin and the gloss layer is formed by containing a long chain alkyl group-containing resin and an emulsion type silicone copolymer resin. The long chain alkyl group-containing resin is preferably an acrylic resin containing long-chain alkyl group(s) and the silicone copolymer resin is preferably a silicone-acryl copolymer resin and/or a silicone-urethane copolymer resin.Type: ApplicationFiled: September 25, 2014Publication date: August 18, 2016Inventors: Yasuaki Matsumori, Akihito Ogino, Yoshimi Midorikawa, Yoshihide Watanabe
-
Patent number: 9073376Abstract: The present invention provides a compound represented by the formula (1). The compound represented by the formula (1) is a developing agent superior in both color-developing sensitivity with low energy and image stability [in the following formula, wherein R1 is a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or an aralkyl group, R2 in the number of m are each independently an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogen atom, a hydroxy group, a cyano group, a nitro group, a carboxy group or an amino group, R3 in the number of n are each independently an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogen atom, a hydroxy group, a cyano group, a nitro group, a carboxy group or an amino group, and m and n are each independently an integer of 0-4.Type: GrantFiled: October 31, 2012Date of Patent: July 7, 2015Assignees: NIPPON PAPER INDUSTRIES CO., LTD., Mitsubishi Chemical CorporationInventors: Akihito Ogino, Yoshimi Midorikawa, Yukiko Sato, Keiichiro Inada, Mai Higuchi, Mamoru Suga
-
Patent number: 8975212Abstract: The invention provides a phenolsulfonic acid aryl ester represented by formula (1) wherein each symbol is as defined in the description. The phenolsulfonic acid aryl ester is useful as a developer to provide a thermal recording material with good color-developing sensitivity, image density when printed at a low application energy (i.e., high start-up sensitivity), and heat and plasticizer resistance. The invention also provides a thermal recording material using the developer.Type: GrantFiled: September 16, 2011Date of Patent: March 10, 2015Assignees: Mitsubishi Chemical Corporation, Nippon Paper Industries Co., Ltd.Inventors: Mai Higuchi, Yoshimune Aosaki, Keiichiro Inada, Mamoru Suga, Katsuto Ohse, Yoshimi Midorikawa, Yukiko Sato
-
Publication number: 20140315713Abstract: The present invention provides a compound represented by the formula (1). The compound represented by the formula (1) is a developing agent superior in both color-developing sensitivity with low energy and image stability [in the following formula, wherein R1 is a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or an aralkyl group, R2 in the number of m are each independently an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogen atom, a hydroxy group, a cyano group, a nitro group, a carboxy group or an amino group, R3 in the number of n are each independently an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogen atom, a hydroxy group, a cyano group, a nitro group, a carboxy group or an amino group, and m and n are each independently an integer of 0-4.Type: ApplicationFiled: October 31, 2012Publication date: October 23, 2014Applicants: NIPPON PAPER INDUSTRIES CO., LTD., MITSUBISHI CHEMICAL CORPORATIONInventors: Akihito Ogino, Yoshimi Midorikawa, Yukiko Sato, Keiichiro Inada, Mai Higuchi, Mamoru Suga
-
Patent number: 8673812Abstract: The present invention present a thermosensitive recording medium having excellent printed image quality on a thermosensitive recording surface, particularly for bar code readability, and also good record density and recording property after storage. In a thermosensitive recording medium obtained by installing on a substrate a thermosensitive recording layer containing a colorless or pale electron donating leuco dye and an electron accepting coloring agent, the water drop absorbency of the surface on which a thermosensitive recording layer is installed on said substrate is adjusted to at least 50 seconds by having at least 5 wt. % of mechanical pulp present in the substrate and controlling the sizing agent treatment of the substrate.Type: GrantFiled: June 3, 2010Date of Patent: March 18, 2014Assignee: Nippon Paper Industries Co., Ltd.Inventors: Katsuto Ohse, Yasuaki Matsumori, Yoshimi Midorikawa, Yukiko Satou
-
Publication number: 20130237414Abstract: The invention provides a phenolsulfonic acid aryl ester represented by formula (1) wherein each symbol is as defined in the description. The phenolsulfonic acid aryl ester is useful as a developer to provide a thermal recording material with good color-developing sensitivity, image density when printed at a low application energy (i.e., high start-up sensitivity), and heat and plasticizer resistance. The invention also provides a thermal recording material using the developer.Type: ApplicationFiled: September 16, 2011Publication date: September 12, 2013Applicants: NIPPON PAPER INDUSTRIES CO., LTD., API CORPORATIONInventors: Mai Higuchi, Yoshimune Aosaki, Keiichiro Inada, Mamoru Suga, Katsuto Ohse, Yoshimi Midorikawa, Yukiko Sato
-
Patent number: 8492308Abstract: The present invention provides a thermosensitive recording medium with excellent color developing sensitivity, moist heat resistance and plasticizer resistance, as well as excellent heat resistance, background coloring, light resistance and the like in the printed image. A diphenyl sulfone derivative containing a hydroxyl group on one end and an alkoxy group on the other end has a higher melting point than the one containing hydroxyl groups on both ends. As a result, the thermosensitive recording medium obtained using the diphenyl sulfone derivative as the color developing agent in the thermosensitive color developing layer has excellent heat resistance. However the color developing sensitivity of the thermosensitive recording medium generally declines simultaneously, when a color developing agent with a high melting point is ordinarily used.Type: GrantFiled: August 21, 2008Date of Patent: July 23, 2013Assignees: Nippon Paper Industries Co., Ltd., API CorporationInventors: Tatsuyuki Kurihara, Tatsuo Nagai, Yoshimi Midorikawa, Akihito Ogino, Mamoru Suga, Yoshimune Aosaki
-
Patent number: 8466085Abstract: The present invention provides a thermosensitive recording medium, which has a satisfactory color developing sensitivity, an excellent general printability (surface strength) and an excellent anti-sticking property. The thermosensitive recording layer of the thermosensitive recording medium of the present invention contains an alkylketene dimer. Without forming a protecting layer, the thermosensitive recording medium of the present invention is superior in color developing sensitivity, general printability (surface strength) and anti-sticking property.Type: GrantFiled: December 19, 2007Date of Patent: June 18, 2013Assignee: Nippon Paper Industries Co., Ltd.Inventors: Aya Kato, Tatsuyuki Kurihara, Tatsuo Nagai, Yoshimi Midorikawa, Kenji Hirai, Akihito Ogino
-
Publication number: 20120129692Abstract: The present invention present a thermosensitive recording medium having excellent printed image quality on a thermosensitive recording surface, particularly for bar code readability, and also good record density and recording property after storage. In a thermosensitive recording medium obtained by installing on a substrate a thermosensitive recording layer containing a colorless or pale electron donating leuco dye and an electron accepting coloring agent, the water drop absorbency of the surface on which a thermosensitive recording layer is installed on said substrate is adjusted to at least 50 seconds by having at least 5 wt. % of mechanical pulp present in the substrate and controlling the sizing agent treatment of the substrate.Type: ApplicationFiled: June 3, 2010Publication date: May 24, 2012Inventors: Katsuto Ohse, Yasuaki Matsumori, Yoshimi Midorikawa, Yukiko Satou
-
Publication number: 20110269622Abstract: The present invention provides a thermosensitive recording medium having an excellent image durability, even when used in a severe condition. A thermosensitive recording medium having a thermosensitive color developing layer comprising a colorless or pale colored dye and two kinds of color developing agents on a substrate, wherein the thermosensitive color developing layer contains bis (3-allyl-4-hydroxyphenyl) sulfone and a phenol novolac compound as the color developing agents.Type: ApplicationFiled: March 27, 2009Publication date: November 3, 2011Inventors: Katsuto Ohse, Yoshimi Midorikawa, Akihito Ogino, Keiichirou Inada, Yoshimune Aosaki