Patents by Inventor Seiji Aida
Seiji Aida 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: 20150353749Abstract: The present invention relates to a pigment ink composition that can fulfill excellent print stability, and performances and drying performance of printed matters. The ink composition comprises: at least a pigment; an organic solvent; and two or more kinds of binder resins having different weight average molecular weights (Mw), wherein, when a binder resin having lowest weight average molecular weight (Mw) is marked as ?, and a binder resin having higher weight average molecular weight (Mw) than that of the binder resin ? and meeting formula (3) is marked as ? among the two or more kinds of binder resins to be used, the ink composition meets formulae (1) and (2): Formula (1): Mw??Mw??10,000, Formula (2): 1,000<Mw?<30,000, and Formula (3): 20,000<Mw?<100,000, wherein Mw? represents the weight average molecular weight of the binder resin ?, and Mw? represents the weight average molecular weight of the binder resin ?.Type: ApplicationFiled: August 21, 2015Publication date: December 10, 2015Applicant: TOYO INK SC HOLDINGS CO., LTD.Inventors: Atsushi YODA, Seiji Aida, Ken Yamasaki, Daisuke Fujiwara, Kouhei Yamada, Kazunori Shigemori, Mitsuo Umezawa
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Patent number: 8530400Abstract: Provided is a maintenance liquid for inkjet printers, which comprises at least one of glycol ethers and glycol esters represented by the following general formulas (1) to (3), and 45 to 10 mg/L of dissolved oxygen: R1CO(OR2)xOR3??General formula (1) R4CO(OR5)YOCOR6??General formula (2) R7(OR8)ZOR9??General formula (3) wherein R2, R5, and R8 each independently represent an ethylene group or a propylene group, R1, R3, R4, and R6 each independently represent an alkyl group having 1 to 4 carbon atoms, R7 and R9 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and X, Y, and Z each independently represent an integer of 1 to 4.Type: GrantFiled: April 25, 2008Date of Patent: September 10, 2013Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Eriko Seki, Seiji Aida, Yasuo Yoshihiro, Kaori Nakano, Ken Yamasaki
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Patent number: 8519020Abstract: A non-aqueous ink jet which has less bad odor, has excellent safety and sanitariness, excellent resin dissolvability, excellent printing stability and excellent dryability, causes no corrosion of printers, and has good adhesiveness to non-absorbent substrates, and an ink set are provided. In the non-aqueous inkjet ink comprising a pigment, a resin and a mixed solvent, the mixed solvent comprises diethylene glycol dialkyl ether and tetraethylene glycol dialkyl ether.Type: GrantFiled: October 19, 2007Date of Patent: August 27, 2013Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Seiji Aida, Ken Yamasaki, Atsushi Yoda, Kaori Nakano
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Publication number: 20110230603Abstract: The present invention relates to a pigment ink composition that can fulfill excellent print stability, and performances and drying performance of printed matters. The ink composition comprises: at least a pigment; an organic solvent; and two or more kinds of binder resins having different weight average molecular weights (Mw), wherein, when a binder resin having lowest weight average molecular weight (Mw) is marked as ?, and a binder resin having higher weight average molecular weight (Mw) than that of the binder resin ? and meeting formula (3) is marked as ? among the two or more kinds of binder resins to be used, the ink composition meets formulae (1) and (2): Formula (1): Mw??Mw??10,000, Formula (2): 1,000<Mw?<30,000, and Formula (3): 20,000<Mw?<100,000, wherein Mw? represents the weight average molecular weight of the binder resin ?, and Mw? represents the weight average molecular weight of the binder resin ?.Type: ApplicationFiled: September 4, 2009Publication date: September 22, 2011Applicant: TOYO INK MFG. CO., LTD.Inventors: Atsushi Yoda, Seiji Aida, Ken Yamasaki, Daisuke Fujiwara, Kouhei Yamada, Kazunori Shigemori, Mitsuo Umezawa
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Patent number: 7897657Abstract: Present invention relates to an inkjet ink used for a polyvinyl chloride resin sheet, wherein the inkjet ink comprises an organic solvent, a pigment and a vinyl chloride-vinyl acetate resin, the organic solvent is a mixed solvent comprising at least one compound selected from the group consisting of compounds represented by a formula (1) and compounds represented by a formula (2), together with a lactone compound, and the quantity of the lactone compound is within a range from 1 to 40% by weight relative to the total weight of the ink. [Formula 1] CH3CO(OR1)mOR2??(1) (wherein, R1 represents an ethylene group or propylene group, R2 represents an alkyl group of 1 to 4 carbon atoms, and m represents an integer from 1 to 3) [Formula 2] CH3CH(OH)COOR3??(2) (wherein, R3 represents an alkyl group of 1 to 8 carbon atoms).Type: GrantFiled: June 13, 2006Date of Patent: March 1, 2011Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Kaori Nakano, Seiji Aida, Ken Yamasaki, Eriko Seki
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Publication number: 20100317775Abstract: A non-aqueous ink jet which has less bad odor, has excellent safety and sanitariness, excellent resin dissolvability, excellent printing stability and excellent dryability, causes no corrosion of printers, and has good adhesiveness to non-absorbent substrates, and an ink set are provided. In the non-aqueous inkjet ink comprising a pigment, a resin and a mixed solvent, the mixed solvent comprises diethylene glycol dialkyl ether and tetraethylene glycol dialkyl ether.Type: ApplicationFiled: October 19, 2007Publication date: December 16, 2010Applicant: Toyo Ink Mfg. Co., Ltd.Inventors: Seiji Aida, Ken Yamasaki, Atsushi Yoda, Kaori Nakano
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Publication number: 20100126529Abstract: Provided is a maintenance liquid for inkjet printers, which comprises at least one of glycol ethers and glycol esters represented by the following general formulas (1) to (3), and 45 to 10 mg/L of dissolved oxygen: R1CO(OR2)xOR3??General formula (1) R4CO(OR5)YOCOR6??General formula (2) R7(OR8)ZOR9??General formula (3) wherein R2, R5, and R8 each independently represent an ethylene group or a propylene group, R1, R3, R4, and R6 each independently represent an alkyl group having 1 to 4 carbon atoms, R7 and R9 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and X, Y, and Z each independently represent an integer of 1 to 4.Type: ApplicationFiled: April 25, 2008Publication date: May 27, 2010Applicant: TOYO INK MFG. CO., TLDInventors: Eriko Seki, Seiji Aida, Yasuo Yoshihiro, Kaori Nakano, Ken Yamasaki
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Patent number: 7604695Abstract: An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds of the formula (1) and (2), wherein each of R1, R2 and R4 independently represents an oxygen atom or —NR6— wherein R6 represents an alkyl group having 1 to 3 carbon atoms, a hydroxyalkyl group, a hydroxyl group or a hydrogen atom, and each of R3 and R5 independently represents a branched or non-branched hydrocarbon group represented by CmHn wherein m is an integer of 2 to 8 and n is an integer of 2m-4, 2m-2 or 2m.Type: GrantFiled: November 27, 2006Date of Patent: October 20, 2009Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Kaori Nakano, Ken Yamasaki, Seiji Aida, Nozomi Tsushima
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Publication number: 20090118418Abstract: Present invention relates to an inkjet ink used for a polyvinyl chloride resin sheet, wherein the inkjet ink comprises an organic solvent, a pigment and a vinyl chloride-vinyl acetate resin, the organic solvent is a mixed solvent comprising at least one compound selected from the group consisting of compounds represented by a formula (1) and compounds represented by a formula (2), together with a lactone compound, and the quantity of the lactone compound is within a range from 1 to 40% by weight relative to the total weight of the ink.Type: ApplicationFiled: June 13, 2006Publication date: May 7, 2009Applicant: Toyo Ink Mfg. Co., LtdInventors: Kaori Nakano, Seiji Aida, Ken Yamasaki, Eriko Seki
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Publication number: 20090092801Abstract: A nonaqueous ink composition for an ink jet recording, comprising (A) a urethane resin dispersant with an acidic functional group, (B) a pigment, and (C) an organic solvent [and optionally (D) a thermal reactive compound], characterized in that the urethane resin dispersant (A) is a branched urethane resin dispersant prepared by polymerizing a terminal-isocyanate-containing compound (p), which has been prepared by reacting (a) a polyisocyanate having three or more isocyanate groups, and (b) a monoalcohol, under the condition that a molar ratio (Ma/Mb) of the number of moles (Ma) of isocyanate groups (NCO) from the polyisocyanate (a) to the number of moles (Mb) of hydroxyl groups (OH) from the monoalcohol (b) is 3/2 to 3/0.Type: ApplicationFiled: April 24, 2007Publication date: April 9, 2009Applicant: TOYO INK MANUFACTURING CO., LTD.Inventors: Shinichi Sato, Seiji Aida, Atsushi Nakazato, Tsutomu Hiroshima, Yoshikazu Tanaka, Dai Inagaki, Takayuki Nogami, Tomonori Ikegami
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Patent number: 7407536Abstract: An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds represented by the formulae (1) to (3), wherein each of R1, R2, R3, R4, R7 and R8 independently represents an alkylene group having 1 to 4 carbon atoms or an alkenylene group having 2 to 4 carbon atoms and each of R5, R6 and R9 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.Type: GrantFiled: November 27, 2006Date of Patent: August 5, 2008Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Kaori Nakano, Ken Yamasaki, Seiji Aida, Takahiko Uesugi, Nozomi Tsushima
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Patent number: 7381760Abstract: The invention relates to a pigment dispersion comprising: a condensate of or a salt between a polyallylamine and a polyester having a free carboxylic acid or the salt; a pigment derivative represented by the following general formula (1); a pigment; and an organic solvent, (P?X)?[N(R1, R2, R3, R4)]+??general formula (1) wherein p represents an organic dyestuff residue; X represents a sulfonic acid group or a carboxylic acid group; R1 represents an alkyl group having 5 to 20 carbon atoms; and R2, R3 and R4 each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.Type: GrantFiled: June 29, 2004Date of Patent: June 3, 2008Assignee: Toyo Ink Mfg.Co., Ltd.Inventors: Seiji Aida, Shinya Fujimatsu, Kaori Nakano, Shinichi Sato, Daisuke Tanabe
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Publication number: 20070119342Abstract: An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds of the formulae (1) and (2), wherein each of R1, R2 and R4 independently represents an oxygen atom or —NR6— wherein R6 represents an alkyl group having 1 to 3 carbon atoms, a hydroxyalkyl group, a hydroxyl group or a hydrogen atom, and each of R3 and R5 independently represents a branched or non-branched hydrocarbon group represented by CmHn wherein m is an integer of 2 to 8 and n is an integer of 2m-4, 2m-2 or 2m.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Inventors: Kaori Nakano, Ken Yamasaki, Seiji Aida, Nozomi Tsushima
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Publication number: 20070119335Abstract: An ink composition containing an organic solvent and a pigment, which has a little amount of smell, excellent safety and health properties, excellent resin solubility, excellent printing stability and excellent drying properties, causes no corrosion to a printer, and is excellent in adhesion to non-absorbable printing media and good printability, wherein the ink composition comprises as the organic solvent at least one compound selected from compounds represented by the formulae (1) to (3), wherein each of R1, R2, R3, R4, R7 and R8 independently represents an alkylene group having 1 to 4 carbon atoms or an alkenylene group having 2 to 4 carbon atoms and each of R5, R6 and R9 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Inventors: Kaori Nakano, Ken Yamasaki, Seiji Aida, Takahiko Uesugi, Nozomi Tsushima
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Patent number: 7205341Abstract: The present invention relates to an aqueous pigment dispersion that shows excellent dispersibility and storage stability, an inkjet ink that shows excellent jetability, water resistance, and adhesion, and a process for producing an aqueous pigment dispersion that shows excellent dispersibility and storage stability, as well as superior jetability, water resistance and adhesion. An aqueous pigment dispersion of the present invention comprises a dispersion formed by dispersing a monoalkyl maleate graft polymer of a maleic anhydride/?-olefin copolymer in water in the presence of a base, a pigment, and an aqueous medium.Type: GrantFiled: August 25, 2003Date of Patent: April 17, 2007Assignee: Toyo Ink Mfg. Co., Ltd.Inventor: Seiji Aida
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Publication number: 20040266912Abstract: The invention relates to a nonaqueous ink-jet ink comprising at least two kinds of mixed organic solvents, a pigment and a resin, wherein all of the following mathematical formulae (1) (2) and (3) are satisfied in which when the total amount of the mixed organic solvents is regarded as 1, weight ratios of the respective organic solvents are x1, x2 . . . xn wherein n represents an integer; vapor pressures (mmHg) of the respective organic solvents at 20° C. are y1, y2 . . . yn wherein n represents an integer; A=x1y1+x2y2+ . . . +xnyn; and B=x1/y1+x2/y2+ . . .Type: ApplicationFiled: July 12, 2004Publication date: December 30, 2004Applicant: Toyo Ink Mfg. Co., Ltd.Inventors: Seiji Aida, Shinya Fujimatsu, Kaori Nakano, Shinichi Sato
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Publication number: 20040266911Abstract: The invention relates to a pigment dispersion comprising: a condensate of or a salt between a polyallylamine and a polyester having a free carboxylic acid or the salt; a pigment derivative represented by the following general formula (1); a pigment; and an organic solvent,Type: ApplicationFiled: June 29, 2004Publication date: December 30, 2004Applicant: Toyo Ink Mfg. Co., Ltd.Inventors: Seiji Aida, Shinya Fujimatsu, Kaori Nakano, Shinichi Sato, Daisuke Tanabe
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Publication number: 20040068030Abstract: The present invention relates to an aqueous pigment dispersion that shows excellent dispersibility and storage stability, an inkjet ink that shows excellent jetability, water resistance, and adhesion, and a process for producing an aqueous pigment dispersion that shows excellent dispersibility and storage stability, as well as superior jetability, water resistance and adhesion. An aqueous pigment dispersion of the present invention comprises a dispersion formed by dispersing a monoalkyl maleate graft polymer of a maleic anhydride/&agr;-olefin copolymer in water in the presence of a base, a pigment, and an aqueous medium.Type: ApplicationFiled: August 25, 2003Publication date: April 8, 2004Applicant: Toyo Ink Mfg. Co., Ltd.Inventor: Seiji Aida
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Patent number: 6648954Abstract: A water-based pigment dispersion comprising 100 parts by weight of a pigment, 3 to 30 parts by weight of a sulfonic acid group-containing pigment derivative and water, wherein the sulfonic acid group-containing pigment derivative has only one sulfonic acid group in a molecule of a pigment of which the type is the same as the type of the pigment to be dispersed, the sulfonic acid group forms at least one salt selected from the group consisting of ammonia salt, an organic amine salt and a salt in which at least 15% of the sulfonic acid group is liberated and the rest is a salt with monovalent metal, the content of metal ion having a valence of at least 2 in a solid matter of the above water-based pigment dispersion is 500 ppm or less, and the above pigment is dispersed in water according to electrostatic repulsion due to the sulfonic acid group-containing pigment derivative adsorbed on the particle surface of the pigment, an inkjet recording liquid containing the same and process for the production thereof.Type: GrantFiled: March 5, 2001Date of Patent: November 18, 2003Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Toshiyuki Uemura, Jun Kaneda, Eriko Suzuki, Takashi Negishi, Seiji Aida
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Publication number: 20010029870Abstract: A water-based pigment dispersion comprising 100 parts by weight of a pigment, 3 to 30 parts by weight of a sulfonic acid group-containing pigment derivative and water, wherein the sulfonic acid group-containing pigment derivative has only one sulfonic acid group in a molecule of a pigment of which the type is the same as the type of the pigment to be dispersed, the sulfonic acid group forms at least one salt selected from the group consisting of ammonia salt, an organic amine salt and a salt in which at least 15% of the sulfonic acid group is liberated and the rest is a salt with monovalent metal, the content of metal ion having a valence of at least 2 in a solid matter of the above water-based pigment dispersion is 500 ppm or less, and the above pigment is dispersed in water according to electrostatic repulsion due to the sulfonic acid group-containing pigment derivative adsorbed on the particle surface of the pigment, an inkjet recording liquid containing the same and process for the production thereof.Type: ApplicationFiled: March 5, 2001Publication date: October 18, 2001Inventors: Toshiyuki Uemura, Jun Kaneda, Eriko Suzuki, Takashi Negishi, Seiji Aida