Patents by Inventor Yukihiko Kawaharada
Yukihiko Kawaharada 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: 10240044Abstract: The present invention provides an aqueous pigment dispersion including a pigment, an anionic group-containing organic polymer compound, and bio-nanofibers having an average diameter of 1 nm or more and 100 nm or less and an aspect ratio of 100 or more, and also provides an aqueous ink using the aqueous pigment dispersion. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers. The anionic group-containing organic polymer compound is preferably at least one selected from the group consisting of acrylic resins having anionic groups, polyurethane resins having anionic groups, and polysaccharide derivatives having anionic groups.Type: GrantFiled: April 16, 2015Date of Patent: March 26, 2019Assignee: DIC CORPORATION (TOKYO)Inventors: Yukihiko Kawaharada, Takaaki Nabe
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Patent number: 10000647Abstract: The present invention provides an aqueous pigment dispersion including at least a pigment, colloidal silica, bio-nanofibers having an average diameter of 1 nm to 100 nm and an aspect ratio of 100 or more, an anionic group-containing organic polymer compound, and also provides an aqueous ink. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers, and the ratio between the pigment, the colloidal silica, and the bio-nanofibers preferably satisfies (1) colloidal silica/pigment=1/100 to 20/100 or (2) colloidal silica/bio-nanofibers=1/2 to 10/1 and (3) bio-nanofibers/pigment=1/100 to 15/100.Type: GrantFiled: August 25, 2015Date of Patent: June 19, 2018Assignee: DIC CORPORATIONInventors: Yukihiko Kawaharada, Takaaki Nabe, Yoshinosuke Shimamura
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Publication number: 20170253754Abstract: The present invention provides an aqueous pigment dispersion including at least a pigment, colloidal silica, bio-nanofibers having an average diameter of 1 nm to 100 nm and an aspect ratio of 100 or more, an anionic group-containing organic polymer compound, and also provides an aqueous ink. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers, and the ratio between the pigment, the colloidal silica, and the bio-nanofibers preferably satisfies (1) colloidal silica/pigment=1/100 to 20/100 or (2) colloidal silica/bio-nanofibers=1/2 to 10/1 and (3) bio-nanofibers/pigment=1/100 to 15/100.Type: ApplicationFiled: August 25, 2015Publication date: September 7, 2017Applicant: DIC CorporationInventors: Yukihiko Kawaharada, Takaaki Nabe, Yoshinosuke Shimamura
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Publication number: 20170051150Abstract: The present invention provides an aqueous pigment dispersion including a pigment, an anionic group-containing organic polymer compound, and bio-nanofibers having an average diameter of 1 nm or more and 100 nm or less and an aspect ratio of 100 or more, and also provides an aqueous ink using the aqueous pigment dispersion. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers. The anionic group-containing organic polymer compound is preferably at least one selected from the group consisting of acrylic resins having anionic groups, polyurethane resins having anionic groups, and polysaccharide derivatives having anionic groups.Type: ApplicationFiled: April 16, 2015Publication date: February 23, 2017Applicant: DIC CORPORATION (TOKYO)Inventors: Yukihiko Kawaharada, Takaaki Nabe
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Patent number: 9359514Abstract: Disclosed are an ink jet recording water-based ink having excellent long-term storage stability and ejection stability at a pigment concentration greater than or equal to a certain level and a simple and efficient method for producing such a water-based ink. The present invention provides an ink jet recording water-based ink in which the total content of polyvalent metals as impurities in the water-based ink is not more than 1.2 ppm in terms of 1 mass % of a pigment concentration. Furthermore, the present invention provides a method for producing an ink jet recording water-based ink; the method enables efficient production of the above-mentioned ink jet recording water-based ink through a contact treatment with a particulate chelating resin in which each resin particle contains both an alkali metal-bonded chelating group and a hydrogen-bonded chelating group.Type: GrantFiled: December 22, 2011Date of Patent: June 7, 2016Assignee: DIC CORPORATIONInventors: Yoshinosuke Shimamura, Hiroyuki Buei, Yukihiko Kawaharada, Shinichi Okada, Soetrisno Misawa
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Publication number: 20160152848Abstract: A water-based ink for ink-jet recording including a pigment, a pigment-dispersing agent, a binder, and water. The pigment-dispersing agent includes a styrene-acrylic copolymer, and the binder includes a polyolefin resin. A method for producing a laminated body including the steps of: forming a print layer on a nonabsorbable base material by an ink-jet recording method using the water-based ink for ink-jet recording; forming an adhesive layer on the print layer; and laminating a sealant film layer on a surface of the adhesive layer.Type: ApplicationFiled: April 26, 2013Publication date: June 2, 2016Applicant: DIC CORPORATIONInventors: Toshihisa Kimura, Yukihiko Kawaharada, Yoshihiro Sato
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Publication number: 20130338310Abstract: Disclosed are an ink jet recording water-based ink having excellent long-term storage stability and ejection stability at a pigment concentration greater than or equal to a certain level and a simple and efficient method for producing such a water-based ink. The present invention provides an ink jet recording water-based ink in which the total content of polyvalent metals as impurities in the water-based ink is not more than 1.2 ppm in terms of 1 mass % of a pigment concentration. Furthermore, the present invention provides a method for producing an ink jet recording water-based ink; the method enables efficient production of the above-mentioned ink jet recording water-based ink through a contact treatment with a particulate chelating resin in which each resin particle contains both an alkali metal-bonded chelating group and a hydrogen-bonded chelating group.Type: ApplicationFiled: December 22, 2011Publication date: December 19, 2013Applicant: DIC CORPORATIONInventors: Yoshinosuke Shimamura, Hiroyuki Buei, Yukihiko Kawaharada, Shinichi Okada, Soetrisno Misawa
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Publication number: 20100044652Abstract: The present invention relates to a pigment composition or pigment dispersion suitable for producing a blue pixel portion of a color filter used in a liquid crystal display device, and also relates to a color filter. An object of the present invention is to obtain a color filter having a blue pixel portion capable of achieving a liquid crystal display device, which has a high contrast for making the images on the display screen even sharper and has a high brightness for making the display screen even brighter, and to provide a pigment composition or pigment dispersion for obtaining the color filter. The object can be achieved by the pigment composition or pigment dispersion for color filters characterized by containing a copper phthalocyanine sulfamoyl compound substituted with a sulfamoyl group having a specific polyalkylene oxide group, and a blue organic pigment.Type: ApplicationFiled: March 4, 2008Publication date: February 25, 2010Applicant: DIC CORPORATIONInventors: Yukihiko Kawaharada, Motokazu Ishimori, Seiji Funakura
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Publication number: 20070042163Abstract: A film for hydraulic transfer having a supporting film formed from a water-soluble or water-swelling resin, and a transfer layer that is soluble in organic solvent provided on top of the supporting film, in which the transfer layer includes a curable resin layer that is curable by irradiation with an active energy beam, and a decorative layer composed of an ink or a coating film, wherein the curable resin layer is non-adhesive at room temperature, and contains: 1) a non-polymerizable thermoplastic resin (A), and, 2) a radical polymerizable oligomer (B1), having a weight average molecular weight within a range from 700 to 3,000 and being compatibility with the non-polymerizable thermoplastic resin (A).Type: ApplicationFiled: September 30, 2004Publication date: February 22, 2007Applicant: Dainppon Ink and Chemicals, Inc.Inventors: Toshirou Ariga, Yoshitomo Nagata, Takashi Suzuki, Yukihiko Kawaharada
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Patent number: 6902642Abstract: Using a hydraulic transfer film wherein a transfer layer is composed of a decorative layer made of a printing ink coating film or a paint coating film, the transfer layer is hydraulically transferred onto a target body for transfer made of a metal substrate having a cured coating film layer in which a xylene absorption amount is within a range from 3.5 to 100 g/m2. Alternatively, using a hydraulic transfer film wherein a transfer layer has a protective layer made of a radiation-curable resin or a thermosetting resin, the transfer layer is hydraulically transferred onto a target body for transfer made of a metal substrate having a cured coating film layer in which a xylene absorption amount is within a range from 10 to 100 g/m2.Type: GrantFiled: October 24, 2002Date of Patent: June 7, 2005Assignees: Dainippon Ink and Chemicals, Inc., Nippon Decor, Inc.Inventors: Yukihiko Kawaharada, Akihiro Sawaguchi, Mitsutaka Nanbo, Hiroyuki Tabe, Shinji Kato, Shuzo Mizuno
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Publication number: 20030108675Abstract: Using a hydraulic transfer film wherein a transfer layer is composed of a decorative layer made of a printing ink coating film or a paint coating film, the transfer layer is hydraulically transferred onto a target body for transfer made of a metal substrate having a cured coating film layer in which a xylene absorption amount is within a range from 3.5 to 100 g/m2. Alternatively, using a hydraulic transfer film wherein a transfer layer has a protective layer made of a radiation-curable resin or a thermosetting resin, the transfer layer is hydraulically transferred onto a target body for transfer made of a metal substrate having a cured coating film layer in which a xylene absorption amount is within a range from 10 to 100 g/m2.Type: ApplicationFiled: October 24, 2002Publication date: June 12, 2003Applicants: DAINIPPON INK AND CHEMICALS, INC., NIPPON DECOR, INC.Inventors: Yukihiko Kawaharada, Akihiro Sawaguchi, Mitsutaka Nanbo, Hiroyuki Tabe, Shinji Kato, Shuzo Mizuno