Patents Assigned to Sanyo Color Works, Ltd.
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Patent number: 11549018Abstract: A pigment composition contains: an azo pigment that is a reaction product between a coupler and a base; and a pigment derivative, and a content of o-anisidine derived from the coupler is less than or equal to 20 mg/kg in the entire pigment composition. A method for producing the pigment composition includes, after reaction between a coupler and a base to generate an azo pigment, or during the reaction between the coupler and the base, adding a remover for o-anisidine derived from the coupler.Type: GrantFiled: November 29, 2018Date of Patent: January 10, 2023Assignee: Sanyo Color Works, Ltd.Inventors: Junichiro Sato, Takeshi Nishikawa
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Patent number: 10570302Abstract: An aqueous dye dispersion for an aqueous ink including a dye derivative as indicated at Formula (1) below; a water-insoluble dye; a dispersant; and water, makes it possible to provide an aqueous dye dispersion for aqueous ink, which reduces flocculation of particles within aqueous ink even when the aqueous ink is prepared, and has satisfactory dispersion stability during storage, thereby providing an aqueous ink having satisfactory dispersion stability during storage.Type: GrantFiled: August 29, 2016Date of Patent: February 25, 2020Assignee: SANYO COLOR WORKS, Ltd.Inventors: Kosuke Tange, Toshiaki Makino
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Publication number: 20190031898Abstract: An aqueous dye dispersion for an aqueous ink including a dye derivative as indicated at Formula (1) below; a water-insoluble dye; a dispersant; and water, makes it possible to provide an aqueous dye dispersion for aqueous ink, which reduces flocculation of particles within aqueous ink even when the aqueous ink is prepared, and has satisfactory dispersion stability during storage, thereby providing an aqueous ink having satisfactory dispersion stability during storage. (At Formula (1), R1 is a group as indicated at Formula (2), below, and R2 is a group as indicated at Formula (3), below. m and n are each 0 or 1 but m+n=1. R3 is at least one species selected from among a hydroxyl group and an amino group. l is 0 to 2; when l=2, R3 may respectively be the same or different.) (At Formula (3), R4 is a phenylene group or an alkylene group having 1 to 4 carbons; R5 and R6 are independently selected alkyl groups having 1 to 4 carbons.Type: ApplicationFiled: August 29, 2016Publication date: January 31, 2019Applicant: SANYO COLOR WORKS, Ltd.Inventors: Kosuke Tange, Toshiaki Makino
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Patent number: 8993674Abstract: To provide an inkjet ink polymer capable of providing an inkjet ink capable of forming a printed product having excellent weather resistance, print density (coloring properties), and fixability (abrasion properties) with good productivity and providing a pigment dispersion having excellent dispersibility with good productivity. An inkjet ink copolymer contains 10 to 99% by weight of a cyclohexyl methacrylate unit and 1 to 90% by weight of an acrylic acid unit. The purpose is achieved by an inkjet ink pigment dispersion containing the inkjet ink copolymer and a pigment.Type: GrantFiled: February 28, 2012Date of Patent: March 31, 2015Assignee: Sanyo Color Works, Ltd.Inventors: Minoru Yoshida, Atsushi Ishikawa, Yoshiya Kobayashi, Kazuki Sase, Eiji Morimoto
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Publication number: 20130338302Abstract: To provide an inkjet ink polymer capable of providing an inkjet ink capable of forming a printed product having excellent weather resistance, print density (coloring properties), and fixability (abrasion properties) with good productivity and providing a pigment dispersion having excellent dispersibility with good productivity. An inkjet ink copolymer contains 10 to 99% by weight of a cyclohexyl methacrylate unit and 1 to 90% by weight of an acrylic acid unit. The purpose is achieved by an inkjet ink pigment dispersion containing the inkjet ink copolymer and a pigment.Type: ApplicationFiled: February 28, 2012Publication date: December 19, 2013Applicant: SANYO COLOR WORKS, LTD.Inventors: Minoru Yoshida, Atsushi Ishikawa, Yoshiya Kobayashi, Kazuki Sase, Eiji Morimoto
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Patent number: 6960252Abstract: Monoazo based yellow pigment compositions for image recording that are suitable as a well-balanced yellow coloring agent for image recording with favorable reproducibility of images and image retaining capacity, which is inexpensive and excellent in safety are provided. Provided is a yellow pigment composition for image recording which includes a monoazo yellow base pigment represented by the general formula (1): and a particular disazo yellow pigment having a sulfonic acid group and/or a particular monoazo yellow pigment.Type: GrantFiled: November 25, 2003Date of Patent: November 1, 2005Assignee: Sanyo Color Works, Ltd.Inventors: Koichi Takahara, Kensuke Misono, Hidehiro Tamatome, Junichiro Sato, Kunji Kitamura
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Publication number: 20040138434Abstract: Monoazo based yellow pigment compositions for image recording that are suitable as a well-balanced yellow coloring agent for image recording with favorable reproducibility of images and image retaining capacity, which is inexpensive and excellent in safety are provided.Type: ApplicationFiled: November 25, 2003Publication date: July 15, 2004Applicant: SANYO COLOR WORKS, LTD.Inventors: Koichi Takahara, Kensuke Misono, Hidehiro Tamatome, Junichiro Sato, Kunji Kitamura
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Patent number: 6512643Abstract: A photoselective absorbing filter that avoids a decrease in luminance of picture elements and is capable of absorbing reflected light with high efficiency, and a color display device equipped with the photoselective absorbing filter, are disclosed. In a filter of the present invention, the transmittance of light at a wavelength ranging from 470 to 510 nm and at a wavelength ranging from 550 to 600 nm is a value smaller than a transmittance of light at a visible range other than said two wavelength ranges. The photoselective absorbing filter of the present invention contains a coloring material containing (a) a pyridinophthalocyanine selected from the group consisting of metal-tetra-2,3-pyridinoporphyrazine, metal-tetra-3,4-pyridinoporphyrazine, tetra-2,3-pyridinoporphyrazine and tetra-3,4-pyridinoporphyrazine, and (b) an anthraquinone dye.Type: GrantFiled: November 17, 2000Date of Patent: January 28, 2003Assignee: Sanyo Color Works, Ltd.Inventors: Atsushi Wada, Yoshinori Kawasaki
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Patent number: 4762569Abstract: The present invention relates to a easily dispersible pigment composition for non-aqueous vehicles, comprising 100 wt. parts of organic pigment or inorganic pigment and 0.5-15 wt. parts of tetracarboxylic acid diimid compound having the following formula [I], and a method for dispersing pigment in non-aqueous vehicle, comprising use of 0.5-15 wt. parts of the compound having the following formula [I] against 100 wt. parts of organic or inorganic pigment. ##STR1## In the formula [I], Q shows naphthaline radical or perylene radical having 4 carbonyl radicals at peri-positions and R.sup.1 and R.sup.2 show either the same or differently hydrogen atom or alkyl radical having 1-2 carbon atoms, and n is 2 or 3.Type: GrantFiled: August 7, 1987Date of Patent: August 9, 1988Assignee: Sanyo Color Works, Ltd.Inventors: Toshiyuki Miki, Mitsumasa Takeya
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Patent number: 4607097Abstract: A dichromatic coloring matter for a colored liquid crystal display element comprising a compound of the general formula: ##STR1## where A and B each stand for ##STR2## where n is 0, 1, 2, 3 or 4, and X and Y each stand for ##STR3## where R.sub.1 and R.sub.2 stand for an alkyl group or hydrogen, --R (alkyl group) or --OR (alkoxy group).Type: GrantFiled: June 4, 1984Date of Patent: August 19, 1986Assignees: Alps Electric Co., Ltd., Sanyo Color Works Ltd.Inventors: Mitsuru Kano, Yoshinori Kato, Yoshimi Kamijo, Yoshio Takeda, Yoshinari Sakikubo, Naoki Yagi