Patents by Inventor Keigo Gouda
Keigo Gouda 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: 20230220222Abstract: An object of the present invention is to provide an inkjet aqueous composition that can sufficiently and easily prevent deterioration or corrosion of a silicon member that forms an ink channel. The present invention relates to an inkjet aqueous composition containing an aqueous medium and a surfactant, in which the surfactant includes a polysiloxane compound having a siloxane structure (—Si—O—) with a repetition number of 5 or more and 1000 or less, and to an inkjet aqueous ink, an inkjet aqueous primer, an inkjet aqueous cleaning liquid, an inkjet aqueous preservation liquid, and an inkjet recording device.Type: ApplicationFiled: March 18, 2021Publication date: July 13, 2023Applicant: DIC CorporationInventors: Ryota Ichikawa, Takahiro Nio, Keigo Gouda
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Publication number: 20220403190Abstract: Provided is an aqueous inkjet ink with which sufficient setting properties and image fastness are achieved even in printing on a less-ink-absorbent or non-ink-absorbent recording medium. An aqueous ink composition for use in an inkjet recording method includes a color material, an aqueous medium, a binder resin, and a wax. The binder resin includes an acid-modified polypropylene resin. The wax includes an oxidized polyethylene wax.Type: ApplicationFiled: November 12, 2020Publication date: December 22, 2022Applicant: DIC CorporationInventors: Ryota Ichikawa, Takahiro Nio, Keigo Gouda
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Publication number: 20220403193Abstract: Provided is an aqueous in ink with which the granularity of an ink coating caused in printing on a less-ink-absorbent or non-ink-absorbent recording medium is reduced while sufficient image fastness is achieved even printing on an ink-absorbent recording medium. The present invention relates to an ague-gas ink composition for use in an inkjet recording method. The aqueous ink composition contains an aqueous medium, a pigment, and a dye, and a combination of the pigment and the dye is a predetermined combination.Type: ApplicationFiled: November 12, 2020Publication date: December 22, 2022Applicant: DIC CorporationInventors: Ryota Ichikawa, Takahiro Nio, Saki Fukui, Keigo Gouda
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Patent number: 11421122Abstract: A problem to be solved by the invention is to provide an aqueous ink capable of forming a clear print image without causing deterioration in print quality due to uneven drying (mottling) of the ink even when continuous printing is performed for a long period of time or when printing is resumed after printing is suspended for several minutes to several hours. The invention relates to an aqueous ink containing: an acetylene-based surfactant (A); a nonionic surfactant (B) other than the acetylene-based surfactant (A); and an aqueous medium (C), in which the nonionic surfactant (B) contains a nonionic surfactant that satisfies at least one of the following three requirements: (i) having an HLB of less than 13.5, (ii) having a clouding point of 75° C. or lower, and (iii) having no clouding point.Type: GrantFiled: October 3, 2019Date of Patent: August 23, 2022Assignee: DIC CORPORATIONInventors: Saki Fukui, Keigo Gouda, Masaki Hosaka
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Publication number: 20210395546Abstract: A problem to be solved by the invention is to provide an aqueous ink capable of forming a clear print image without causing deterioration in print quality due to uneven drying (mottling) of the ink even when continuous printing is performed for a long period of time or when printing is resumed after printing is suspended for several minutes to several hours. The invention relates to an aqueous ink containing: an acetylene-based surfactant (A); a nonionic surfactant (B) other than the acetylene-based surfactant (A); and an aqueous medium (C), in which the nonionic surfactant (B) contains a nonionic surfactant that satisfies at least one of the following three requirements: (i) having an HLB of less than 13.5, (ii) having a clouding point of 75° C. or lower, and (iii) having no clouding point.Type: ApplicationFiled: October 3, 2019Publication date: December 23, 2021Applicant: DIC CorporationInventors: Saki Fukui, Keigo Gouda, Masaki Hosaka
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Publication number: 20210222025Abstract: A problem to be addressed by the present invention is to provide a primer for ink-jet printing inks, the primer being capable of preventing streaks from generating on a printed material, a recording medium, and a method for producing the recording medium. The present invention relates to a primer for ink-jet printing inks, the primer containing an aqueous medium and at least one vinyl polymer (A) selected from the group consisting of a vinyl polymer (A1) having a structural unit derived from an aromatic vinyl monomer and having a glass transition temperature of 50° C. to 100° C. and a halogenated vinyl polymer (A2) having a glass transition temperature of 50° C. to 100° C.Type: ApplicationFiled: June 27, 2019Publication date: July 22, 2021Applicant: DIC CorporationInventors: Hiroaki Okazaki, Takahiro Nio, Keigo Gouda
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Patent number: 10358567Abstract: A compound is represented by the following formula (1). In the compound represented by Formula (1), at least one of R1 to R24 is a group particularly high electron withdrawing property, such as a sulfonic acid group and a carboxylic acid group or a group having the next highest electron withdrawing property to the sulfonic acid group and the carboxylic acid group, such as a halogen atom.Type: GrantFiled: February 24, 2017Date of Patent: July 23, 2019Assignee: Canon Kabushiki KaishaInventors: Yutaka Tani, Masanori Seki, Yoshio Kinoshita, Keigo Gouda
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Patent number: 10125284Abstract: An aqueous ink for ink jet, the aqueous ink including a pigment and a resin for dispersing the pigment. The pigment is impregnated with a compound having a structure in which at least two structures each represented by General Formula (1) are bonded by a glycoside bond.Type: GrantFiled: May 16, 2017Date of Patent: November 13, 2018Assignee: Canon Kabushiki KaishaInventors: Keigo Gouda, Shin-ichi Hakamada, Hisao Kamo, Hitoshi Nagashima, Daiji Okamura, Takakazu Mizutani, Masahito Miyabe, Isamu Oguri, Kouichirou Okumura
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Publication number: 20170335125Abstract: An aqueous ink for ink jet, the aqueous ink including a pigment and a resin for dispersing the pigment. The pigment is impregnated with a compound having a structure in which at least two structures each represented by General Formula (1) are bonded by a glycoside bond.Type: ApplicationFiled: May 16, 2017Publication date: November 23, 2017Inventors: Keigo Gouda, Shin-ichi Hakamada, Hisao Kamo, Hitoshi Nagashima, Daiji Okamura, Takakazu Mizutani, Masahito Miyabe, Isamu Oguri, Kouichirou Okumura
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Publication number: 20170247557Abstract: A compound is represented by the following formula (1). In the compound represented by Formula (1), at least one of R1 to R24 is a group particularly high electron withdrawing property, such as a sulfonic acid group and a carboxylic acid group or a group having the next highest electron withdrawing property to the sulfonic acid group and the carboxylic acid group, such as a halogen atom.Type: ApplicationFiled: February 24, 2017Publication date: August 31, 2017Inventors: Yutaka Tani, Masanori Seki, Yoshio Kinoshita, Keigo Gouda
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Patent number: 9315683Abstract: The present invention provides an ink that can achieve image characteristics for recording an image having excellent optical density, bleeding resistance, and white blur resistance and also can achieve reliability that provides excellent sticking resistance to a recording head. The ink is one for ink jet containing a first pigment and second pigment. The first pigment is a self-dispersible pigment to a surface of a particle of which a first functional group containing a phosphonic acid group is bonded. The second pigment is a self-dispersible pigment to a surface of a particle of which a second functional group not containing a phosphonic acid group but containing an anionic group other than the phosphonic acid group, and further containing another atomic group is bonded. The introduced amount of the functional group of the second pigment is 0.25 mmol/g or more.Type: GrantFiled: May 7, 2013Date of Patent: April 19, 2016Assignee: Canon Kabushiki KaishaInventors: Souichi Nagai, Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Akiko Yasuda
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Patent number: 8985755Abstract: Provided is an ink for ink jet including a first pigment and a second pigment. Each of the first pigment and the second pigment comprises a self-dispersible carbon black in which a functional group containing two phosphonic acid groups is bonded to a particle surface. The average particle size of the first pigment is smaller than the average particle size of the second pigment. The introduced amount of the functional group of the first pigment is higher than the introduced amount of the functional group of the second pigment.Type: GrantFiled: June 3, 2014Date of Patent: March 24, 2015Assignee: Canon Kabushiki KaishaInventors: Fumiaki Fujioka, Masashi Ogasawara, Keigo Gouda, Souichi Nagai, Akiko Yasuda
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Publication number: 20150002576Abstract: Provided is an ink for ink jet including a first pigment and a second pigment. Each of the first pigment and the second pigment comprises a self-dispersible carbon black in which a functional group containing two phosphonic acid groups is bonded to a particle surface. The average particle size of the first pigment is smaller than the average particle size of the second pigment. The introduced amount of the functional group of the first pigment is higher than the introduced amount of the functional group of the second pigment.Type: ApplicationFiled: June 3, 2014Publication date: January 1, 2015Applicant: CANON KABUSHIKI KAISHAInventors: Fumiaki Fujioka, Masashi Ogasawara, Keigo Gouda, Souichi Nagai, Akiko Yasuda
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Publication number: 20140192111Abstract: The present invention provides an ink that can achieve image characteristics for recording an image having excellent optical density, bleeding resistance, and white blur resistance and also can achieve reliability that provides excellent sticking resistance to a recording head. The ink is one for ink jet containing a first pigment and second pigment. The first pigment is a self-dispersible pigment to a surface of a particle of which a first functional group containing a phosphonic acid group is bonded. The second pigment is a self-dispersible pigment to a surface of a particle of which a second functional group not containing a phosphonic acid group but containing an anionic group other than the phosphonic acid group, and further containing another atomic group is bonded. The introduced amount of the functional group of the second pigment is 0.25 mmol/g or more.Type: ApplicationFiled: May 7, 2013Publication date: July 10, 2014Inventors: Souichi Nagai, Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Akiko Yasuda
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Patent number: 8491715Abstract: Disclosed herein are an ink containing a self-dispersible pigment and a salt, wherein the self-dispersible pigment is a pigment to the surface of a particle of which a functional group containing at least a group having a hydrogen bonding property and two phosphonic acid groups is bonded, counter ions of the two phosphonic acid groups containing one of K+ and NH4+; the salt is constituted by combining at least one cation of K+ and NH4+ with at least one anion selected from the group consisting of Cl?, Br?, I?, ClO?, ClO2?, ClO3?, ClO4?, NO2?, NO3?, SO42?, CO32?, HCO3?, HCOO?, (COO?)2, COOH(COO?), CH3COO?, C2H4 (COO?)2, C6H5COO?, C6H4(COO?)2, PO43?, HPO42? and H2PO4?; a cation concentration in the ink is 0.04 mol/L or more; and the viscosity of a liquid obtained by evaporating 15% by mass of the ink is less than 3.5 mPa·s at 25° C.Type: GrantFiled: July 5, 2011Date of Patent: July 23, 2013Assignee: Canon Kabushiki KaishaInventors: Keigo Gouda, Masashi Ogasawara, Tomonari Watanabe, Fumiaki Fujioka, Souichi Nagai, Akiko Yasuda
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Patent number: 8475580Abstract: An ink jet ink including a self-dispersible pigment, a salt, a polyoxyethylene alkyl ether and a water-soluble organic solvent. The self-dispersible pigment is a pigment to a surface of a particle of which a functional group containing at least a phosphonic acid group is bonded, the introduced amount of the functional group bonded to the self-dispersible pigment is 0.10 to 0.33 mmol/g. The salt is constituted by combining a specific cation with a specific anion. The value (Concentration of anion)×(Valence number of anion) of the salt in the ink is 0.005 to 0.06 mol/L. The water-soluble organic solvent includes glycerol, the content of which in the ink is 35% to 78% by mass based on the total content of the water-soluble organic solvent in the ink.Type: GrantFiled: July 5, 2011Date of Patent: July 2, 2013Assignee: Canon Kabushiki KaishaInventors: Souichi Nagai, Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Akiko Yasuda
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Publication number: 20130027463Abstract: An ink cartridge including a housing formed with a resin and an ink stored in the housing, wherein the resin includes a white mica composition; the ink includes a salt and a self-dispersible pigment having a functional group that contains two phosphonic acid groups and is bonded to the particle surface thereof; the salt includes a specific cation and a specific anion; and an amount of calcium in the ink after the ink is preserved in the housing at 60° C. for 2 months is 10.0 ppm or less.Type: ApplicationFiled: June 19, 2012Publication date: January 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Souichi Nagai, Akiko Yasuda, Keiichiro Tsukuda, Hiromasa Amma, Kyosuke Toda
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Publication number: 20120033012Abstract: An ink jet ink including a self-dispersible pigment, a salt, a polyoxyethylene alkyl ether and a water-soluble organic solvent. The self-dispersible pigment is a pigment to a surface of a particle of which a functional group containing at least a phosphonic acid group is bonded, the introduced amount of the functional group bonded to the self-dispersible pigment is 0.10 to 0.33 mmol/g. The salt is constituted by combining a specific cation with a specific anion. The value (Concentration of anion)×(Valence number of anion) of the salt in the ink is 0.005 to 0.06 mol/L. The water-soluble organic solvent includes glycerol, the content of which in the ink is 35% to 78% by mass based on the total content of the water-soluble organic solvent in the ink.Type: ApplicationFiled: July 5, 2011Publication date: February 9, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Souichi Nagai, Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Akiko Yasuda
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Publication number: 20120033009Abstract: Disclosed herein are an ink containing a self-dispersible pigment and a salt, wherein the self-dispersible pigment is a pigment to the surface of a particle of which a functional group containing at least a group having a hydrogen bonding property and two phosphonic acid groups is bonded, counter ions of the two phosphonic acid groups containing one of K+ and NH4+; the salt is constituted by combining at least one cation of K+ and NH4+ with at least one anion selected from the group consisting of Cl?, Br?, I?, ClO?, ClO2?, ClO3?, ClO4?, NO2?, NO3?, SO42?, CO32?, HCO3?, HCOO?, (COO?)2, COOH(COO?), CH3COO?, C2H4 (COO?)2, C6H5COO?, C6H4(COO?)2, PO43?, HPO42? and H2PO4?; a cation concentration in the ink is 0.04 mol/L or more; and the viscosity of a liquid obtained by evaporating 15% by mass of the ink is less than 3.5 mPa·s at 25° C.Type: ApplicationFiled: July 5, 2011Publication date: February 9, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Keigo Gouda, Masashi Ogasawara, Tomonari Watanabe, Fumiaki Fujioka, Souichi Nagai, Akiko Yasuda