Patents by Inventor Mayuko Okamoto
Mayuko Okamoto 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: 11453797Abstract: An ink set containing an inkjet ink and a treatment liquid, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains an alkyl diol (A) of 2 to 8 carbon atoms, the weighted average boiling point of the water-soluble organic solvent at one atmosphere is from 175 to 240° C., the surfactant contains an acetylenediol-based surfactant, the treatment liquid contains a coagulant, calcium nitrate is included as the coagulant in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the pH of the treatment liquid is from 2 to 11.Type: GrantFiled: July 13, 2018Date of Patent: September 27, 2022Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYOCOLOR CO., LTDInventors: Mayuko Okamoto, Kazuhiro Jonai, Atsushi Yoda, Norio Suzuki
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Patent number: 11359107Abstract: An ink set containing an inkjet ink and a treatment liquid used in combination with the inkjet ink, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains a glycol ether-based organic solvent having a specific structure, the treatment liquid contains a coagulant, the coagulant contains calcium nitrate in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the amount of compounds contained in the treatment liquid that have three or more hydroxyl groups is not more than 15% by mass relative to the total mass of the treatment liquid.Type: GrantFiled: July 13, 2018Date of Patent: June 14, 2022Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYOCOLOR CO., LTDInventors: Mayuko Okamoto, Atsushi Yoda, Norio Suzuki, Kazuhiro Jonai
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Patent number: 11352516Abstract: One embodiment relates to a water-based inkjet ink containing at least water, a pigment, a water-soluble organic solvent and a binder resin, wherein the water-soluble organic solvent contains at least a water-soluble organic solvent having a surface tension of 30 to 50 mN/m and a boiling point at 1 atmosphere of 180 to 230° C., in an amount of 15 to 50% by weight relative to the total weight of the water-based inkjet ink, and the acid value of the binder resin is at least 5 mgKOH/g but less than 60 mgKOH/g.Type: GrantFiled: April 17, 2018Date of Patent: June 7, 2022Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYOCOLOR CO., LTDInventors: Atsushi Yoda, Yoshihito Suzuki, Mayuko Okamoto, Kazuhiro Jonai, Norio Suzuki
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Publication number: 20210214569Abstract: One embodiment relates to a water-based inkjet ink containing at least water, a pigment, a water-soluble organic solvent and a binder resin, wherein the water-soluble organic solvent contains at least a water-soluble organic solvent having a surface tension of 30 to 50 mN/m and a boiling point at 1 atmosphere of 180 to 230° C., in an amount of 15 to 50% by weight relative to the total weight of the water-based inkjet ink, and the acid value of the binder resin is at least 5 mgKOH/g but less than 60 mgKOH/g.Type: ApplicationFiled: April 17, 2018Publication date: July 15, 2021Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYOCOLOR CO, LTD.Inventors: Atsushi YODA, Yoshihito SUZUKI, Mayuko OKAMOTO, Kazuhiro JONAI, Norio SUZUKI
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Publication number: 20200172754Abstract: An ink set containing an inkjet ink and a treatment liquid used in combination with the inkjet ink, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains a glycol ether-based organic solvent having a specific structure, the treatment liquid contains a coagulant, the coagulant contains calcium nitrate in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the amount of compounds contained in the treatment liquid that have three or more hydroxyl groups is not more than 15% by mass relative to the total mass of the treatment liquid.Type: ApplicationFiled: July 13, 2018Publication date: June 4, 2020Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Atsushi YODA, Norio SUZUKI, Kazuhiro JONAI
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Publication number: 20200157370Abstract: An ink set containing an inkjet ink and a treatment liquid, wherein the inkjet ink contains a pigment, a water-soluble organic solvent, a surfactant and water, the water-soluble organic solvent contains an alkyl diol (A) of 2 to 8 carbon atoms, the weighted average boiling point of the water-soluble organic solvent at one atmosphere is from 175 to 240° C., the surfactant contains an acetylenediol-based surfactant, the treatment liquid contains a coagulant, calcium nitrate is included as the coagulant in an amount of 6.8 to 20.8% by mass relative to the total mass of the treatment liquid, and the pH of the treatment liquid is from 2 to 11.Type: ApplicationFiled: July 13, 2018Publication date: May 21, 2020Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Kazuhiro JONAI, Atsushi YODA, Norio SUZUKI
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Patent number: 10501654Abstract: A pretreatment solution which is used together with an aqueous inkjet ink that contains at least a pigment, wherein the pretreatment solution contains an inorganic metal salt and/or an organic metal salt that exists in a dissolved state, and an organic solvent, the organic solvent contains a compound having one or more hydroxyl groups in each molecule, and the amount of the organic solvent is from 0.1 to 50% by weight based on the total weight of the pretreatment solution.Type: GrantFiled: January 13, 2017Date of Patent: December 10, 2019Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko Okamoto, Atsushi Yoda, Yoshihito Suzuki, Kazuhiro Jonai
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Patent number: 10472532Abstract: The present invention relates to a magenta ink for inkjet recording containing at least one pigment selected from the group consisting of C.I. Pigment Red 147, 150, 176, 266 and 269, in an amount of 0.5 to 10% by mass relative to the total mass of the ink. The present invention can provide a magenta ink that is comprehensively superior in terms of light resistance, color development and storage stability. The present invention can also provide an ink set having excellent light resistance and color development for each ink included in the ink set, and an inkjet recording method that uses the ink set.Type: GrantFiled: March 30, 2016Date of Patent: November 12, 2019Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko Okamoto, Yuji Kameyama
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Publication number: 20190016911Abstract: A pretreatment solution which is used together with an aqueous inkjet ink that contains at least a pigment, wherein the pretreatment solution contains an inorganic metal salt and/or an organic metal salt that exists in a dissolved state, and an organic solvent, the organic solvent contains a compound having one or more hydroxyl groups in each molecule, and the amount of the organic solvent is from 0.1 to 50% by weight based on the total weight of the pretreatment solution.Type: ApplicationFiled: January 13, 2017Publication date: January 17, 2019Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Atsushi YODA, Yoshihito SUZUKI, Kazuhiro JONAI
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Patent number: 10000649Abstract: The disclosure relates to an active energy ray-curable inkjet ink composition comprising at least a monomer and a pigment, wherein the monomer comprises at least 2-(2-vinyloxyethoxy)ethyl acrylate and dipropylene glycol diacrylate. A content of 2-(2-vinyloxyethoxy)ethyl acrylate is 36 to 65% by weight in a total weight of the ink. A content of dipropylene glycol diacrylate is 31 to 63% by weight in the total weight of the ink. A content of the pigment is 1 to c % by weight in the total weight of the ink, wherein the c is the pigment concentration at which the average absorbance at 320-380 nm in 2,000-fold dilution of the ink composition with dipropylene glycol diacrylate is 1.Type: GrantFiled: March 14, 2014Date of Patent: June 19, 2018Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko Okamoto, Yuji Kameyama, Kazuhiro Jonai
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Publication number: 20180079921Abstract: The present invention relates to a magenta ink for inkjet recording containing at least one pigment selected from the group consisting of C.I. Pigment Red 147, 150, 176, 266 and 269, in an amount of 0.5 to 10% by mass relative to the total mass of the ink. The present invention can provide a magenta ink that is comprehensively superior in terms of light resistance, color development and storage stability. The present invention can also provide an ink set having excellent light resistance and color development for each ink included in the ink set, and an inkjet recording method that uses the ink set.Type: ApplicationFiled: March 30, 2016Publication date: March 22, 2018Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Yuji KAMEYAMA
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Patent number: 9884973Abstract: The present disclosure relates to an active energy ray curable inkjet ink for use in a single pass printing inkjet system, the inkjet ink containing a colorant, a monomer and at least one initiator, wherein the sum of the integrated value(s) of absorbance across wavelengths from 380 to 410 nm of the initiator(s) is at least 35, and 0.02?amount of initiator/amount of monomer?0.50 (weight ratio) is satisfied. The disclosure also relates to an ink set including the ink. The present disclosure is able to show printed articles that exhibit no wrinkling or tack, excellent color reproducibility, and reduced amounts of residual components within the cured film of printed articles, while offering high productivity, and can also show an active energy ray-curable inkjet ink cured film which has a low residue ratio and is of low-odor, while exhibiting similar print quality and productivity to existing printing systems.Type: GrantFiled: October 23, 2014Date of Patent: February 6, 2018Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko Okamoto, Daisuke Fujiwara, Yuji Kameyama, Kazuhiro Jonai
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Patent number: 9809723Abstract: Provided is an active energy ray-curable inkjet ink with high productivity which has the same quality level as the conventional printing and which contains an isoindoline-based pigment having a specific electric conductance, which is measured according to DIN ISO 787/14, of 150 ?S/cm or less.Type: GrantFiled: September 11, 2013Date of Patent: November 7, 2017Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko Okamoto, Tohru Konno, Kazuhiro Jonai
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Publication number: 20170002218Abstract: The disclosure relates to an active energy ray-curable inkjet ink composition comprising at least a monomer and a pigment, wherein the monomer comprises at least 2-(2-vinyloxyethoxy)ethyl acrylate and dipropylene glycol diacrylate. A content of 2-(2-vinyloxyethoxy)ethyl acrylate is 36 to 65% by weight in a total weight of the ink. A content of dipropylene glycol diacrylate is 31 to 63% by weight in the total weight of the ink. A content of the pigment is 1 to c % by weight in the total weight of the ink, wherein the c is the pigment concentration at which the average absorbance at 320-380 nm in 2,000-fold dilution of the ink composition with dipropylene glycol diacrylate is 1.Type: ApplicationFiled: March 14, 2014Publication date: January 5, 2017Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Yuji KAMEYAMA, Kazuhiro JONAI
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Publication number: 20160251527Abstract: The present disclosure relates to an active energy ray curable inkjet ink for use in a single pass printing inkjet system, the inkjet ink containing a colorant, a monomer and at least one initiator, wherein the sum of the integrated value(s) of absorbance across wavelengths from 380 to 410 nm of the initiator(s) is at least 35, and 0.02?amount of initiator/amount of monomer?0.50 (weight ratio) is satisfied. The disclosure also relates to an ink set including the ink. The present disclosure is able to show printed articles that exhibit no wrinkling or tack, excellent color reproducibility, and reduced amounts of residual components within the cured film of printed articles, while offering high productivity, and can also show an active energy ray-curable inkjet ink cured film which has a low residue ratio and is of low-odor, while exhibiting similar print quality and productivity to existing printing systems.Type: ApplicationFiled: October 23, 2014Publication date: September 1, 2016Applicants: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Mayuko OKAMOTO, Daisuke FUJIWARA, Yuji KAMEYAMA, Kazuhiro JONAI
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Patent number: 9157000Abstract: The present invention provides an ink composition for use in active energy beam-curable inkjet printing, wherein the ink composition has low viscosity yet exhibits superior curability and superior adhesion to many different substrates, and also exhibits excellent storage stability. An active energy beam-curable inkjet ink composition containing at least polymerizable monomers (A) and a stabilizer (B), and containing essentially no water, the inkjet ink composition containing, as the polymerizable monomers (A), at least a polymerizable monomer (A-1) containing a vinyl ether group and an acryloyl group, and a polymerizable monomer (A-2) containing 2 or more acryloyl groups.Type: GrantFiled: March 29, 2012Date of Patent: October 13, 2015Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Norio Suzuki, Kazuhiro Jonai, Mayuko Okamoto, Yuji Kameyama, Yohei Konda
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Patent number: 9109130Abstract: The present invention provides an active energy ray-curable inkjet magenta ink composition that achieves excellent color reproducibility and is also excellent in storage stability, and an ink set using the composition. The magenta ink composition according to the present invention contains, as two kinds of quinacridone pigments, (A) unsubstituted quinacridone and (B) 2,9-dimethylquinacridone.Type: GrantFiled: August 29, 2012Date of Patent: August 18, 2015Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Yohei Konda, Mayuko Okamoto, Yuji Kameyama, Kazuhiro Jonai, Norio Suzuki
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Patent number: 9040150Abstract: Provided is an ink composition used in active energy ray-curable inkjet printing, which has excellent curing property, discharge property, storage stability, and compatibility with various substrates. The inkjet ink composition of the present invention includes at least two types of polymerizable compounds selected from a group consisting of (A) 2-(2-vinyloxyethoxy) ethyl acrylate, (B) N-vinyl caprolactam, and (C) at least one type of bifunctional acrylate monomer including at least a diacrylate having a molecular weight of 250 or less.Type: GrantFiled: August 29, 2012Date of Patent: May 26, 2015Assignees: TOYO INK SC HOLDINGS CO., LTD., TOYO INK CO., LTD.Inventors: Yuji Kameyama, Mayuko Okamoto, Yohei Konda, Kazuhiro Jonai, Norio Suzuki
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Patent number: 8933141Abstract: An ink composition which is used for active energy ray-curable inkjet printing, has excellent curability or adhesiveness to multiple base materials while having low viscosity, and exhibits excellent non-yellowing properties of the printed matter is provided. The composition comprises a polymerizable monomer (A) and photopolymerization initiators (B), the polymerizable monomer comprising 2-(2-vinyloxyethoxy)ethyl acrylate (A-1), and the photopolymerization initiators comprising oligo(2-hydroxy-2-methyl-1-(4-(1-methylvinyl)phenyl)propanone) (B-1) and other initiator (B-2).Type: GrantFiled: March 29, 2012Date of Patent: January 13, 2015Assignees: Toyo Ink SC Holdings Co., Ltd., Toyo Ink Co., Ltd.Inventors: Norio Suzuki, Kazuhiro Jonai, Mayuko Okamoto, Yuji Kameyama, Yohei Konda
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Publication number: 20140224150Abstract: The present invention provides an active energy ray-curable inkjet magenta ink composition that achieves excellent color reproducibility and is also excellent in storage stability, and an ink set using the composition. The magenta ink composition according to the present invention contains, as two kinds of quinacridone pigments, (A) unsubstituted quinacridone and (B) 2,9-dimethylquinacridone.Type: ApplicationFiled: August 29, 2012Publication date: August 14, 2014Applicants: TOYO INK CO., LTD., TOYO INK SC HOLDINGS CO., LTD.Inventors: Yohei Konda, Mayuko Okamoto, Yuji Kameyama, Kazuhiro Jonai, Norio Suzuki