Patents by Inventor Yasuo Shirasaki
Yasuo Shirasaki 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: 7740696Abstract: The present invention relates to a water-soluble azo compound for yellow represented by the following formula (1) wherein, A represents a hydroxy group, a morpholino group, an amino group, an aliphatic amine residue which may have a substituent, an aromatic amine residue which may have a substituent, a phenoxy group which may have a substituent, or an alkoxy group which may have a substituent, R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R2 represents a hydrogen atom, a nitro group or a hydroxy group, and n represents an integer number of 1 to 3, respectively as a free acid, and an ink composition containing the same; said ink composition has good stability and is suitable for inkjet printing; and printed matters therewith have very high fastness such as ozone fastness and the like.Type: GrantFiled: December 28, 2005Date of Patent: June 22, 2010Assignee: Nippon Kayaku Kabushiki KaishaInventors: Shinjiro Takahashi, Yoshiyuki Dejima, Yasuo Shirasaki
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Publication number: 20090130399Abstract: The present invention relates to a water-soluble azo compound represented by the following formula (1) [KA 1] (wherein, A represents a hydroxyl group, a morpholino group, an amino group, an aliphatic amine residue which may have a substituent, aromatic amine residue which may have a substituent, a phenoxy group which may have a substituent or an alkoxy group which may have a substituent, R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R2 represents a substituent selected from a hydrogen atom, a halogen atom, a nitro group and a hydroxyl group, n represents an integer number of 1 to 3, respectively) as free acid and an ink composition comprising the same. Said azo compound has hue having high vividness suitable for inkjet recording, said ink composition is excellent in storage stability, and an inkjet recorded article by using this is excellent in fastnesses such as moisture fastness, ozone gas fastness and light fastness.Type: ApplicationFiled: January 24, 2006Publication date: May 21, 2009Inventors: Shinjiro Takahashi, Yoshiyuki Dejima, Yasuo Shirasaki
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Publication number: 20090118479Abstract: The present invention relates to an azo compound represented by the following formula (1) (wherein, each of R1 and R2 independently represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, a sulfo group, a sulfamoyl group or the like, each of m and n independently represents 0 or 1, X represents a sulfo group, B represents a substituted p-phenylene group or a substituted p-naphthylene group (these may be substituted by a group selected from the group consisting of a sulfo group, a sulfo C1 to C4 alkoxy group, a C1 to C4 alkyl group and the like), and C represents a substituted phenyl group or a naphthyl group) or a salt thereof, an ink composition containing it, especially a black ink composition.Type: ApplicationFiled: June 8, 2006Publication date: May 7, 2009Inventors: Hiroaki Ohno, Takahiko Matsui, Shinjirou Takahashi, Yasuo Shirasaki
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Publication number: 20090117341Abstract: The present invention relates to a water-soluble azo compound for yellow represented by the following formula (1) (wherein, A represents a hydroxy group, a morpholino group, an amino group, an aliphatic amine residue which may have a substituent, an aromatic amine residue which may have a substituent, a phenoxy group which may have a substituent, or an alkoxy group which may have a substituent, R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R2 represents a hydrogen atom, a nitro group or a hydroxy group, and n represents an integer number of 1 to 3, respectively) as a free acid, and an ink composition containing the same; said ink composition has good stability and is suitable for inkjet printing; and printed matters therewith have very high fastnesses such as ozone fastness and the like.Type: ApplicationFiled: December 28, 2005Publication date: May 7, 2009Inventors: Shinjiro Takahashi, Yoshiyuki Dejima, Yasuo Shirasaki
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Patent number: 7503967Abstract: An azo compound represented by the following Formula (1) or a salt thereof, and an ink composition comprising the same (wherein, each of R1, R2, R5, R6 and R7 independently represents a hydrogen atom, a carboxyl group, a sulfo group and the like, each of R3 and R4 independently represents a hydrogen atom, a sulfo group, a nitro group, a (C1 to C4) alkyl group (which may be substituted by a hydroxyl group or a (C1 to C4) alkoxy group), a (C1 to C4) alkoxy group (which may be substituted by a hydroxyl group, a (C1 to C4) alkoxy group, a sulfo group or a carboxyl group) and the like, and n represents 0 or 1, respectively).Type: GrantFiled: November 10, 2005Date of Patent: March 17, 2009Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takahiko Matsui, Hiroaki Ohno, Yasuo Shirasaki
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Patent number: 7503965Abstract: A novel azo compound represented by the following Formula (1) wherein A represents the following Formula (2) and is located preferably in a position meta or para to the azo group; R1 and R2 each independently represents hydrogen, carboxy, sulfo, nitro, C1-4 alkoxy, etc.; R3 and R4 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, hydroxy, or C1-4 alkoxy; and n is 0 or 1. [In the Formula (2), R5 represents cyano, carboxy, C1-4 alky, C1-4 alkoxycarbonyl, or phenyl; and R6, R7, and R8 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, C1-4 alkoxy, or acylamino.] The compound is useful as a black dye, especially one for ink compositions for, e.g., inkjet prints. Also provided are: an ink composition which contains the compound and has excellent storage stability; and a print obtained through recording with the ink. The print is excellent in light resistance, ozone resistance, fastness to moisture, etc.Type: GrantFiled: April 6, 2005Date of Patent: March 17, 2009Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takahiko Matsui, Hiroaki Ohno, Takashi Yoneda, Yasuo Shirasaki
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Patent number: 7462228Abstract: The present invention relates to a water-based black ink composition comprising a water-soluble black dye (A) exhibiting ozone fastness and a condensate compound (B) of 4,4?-dinitrostilbene-2,2?-disulfonic acid and aminobenzenes or a reduction product (C) thereof. Said ink composition is suitable for use in ink-jet recording, and realizes neutral hue and black color of high printing density. Further, a printed matter obtained is excellent in ozone gas fastness, light fastness, moisture fastness and color rendering properties. Still further, storage stability as a recording liquid is excellent.Type: GrantFiled: March 4, 2004Date of Patent: December 9, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hiroaki Ohno, Toru Yamaguchi, Takahiko Matsui, Takashi Yoneda, Yoshiaki Kawaida, Yasuo Shirasaki, Kazunobu Nagasaki
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Publication number: 20080292792Abstract: A novel azo compound represented by the following formula (1) wherein A represents the following formula (2) and is located preferably in a position meta or para to the azo group; R1 and R2 each independently represents hydrogen, carboxy, sulfo, nitro, C1-4 alkoxy, etc.; R3 and R4 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, hydroxy, or C1-4 alkoxy; and n is 0 or 1. [In the formula (2), R5 represents cyano, carboxy, C1-4 alky, C1-4 alkoxycarbonyl, or phenyl; and R6, R7, and R8 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, C1-4 alkoxy, or acylamino.] The compound is useful as a black dye, especially one for ink compositions for, e.g., ink-jet prints. Also provided are: an ink composition which contains the compound and has excellent storage stability; and a print obtained through recording with the ink. The print is excellent in light resistance, ozone resistance, fastness to moisture, etc.Type: ApplicationFiled: April 6, 2005Publication date: November 27, 2008Inventors: Takahiko Matsui, Hiroaki Ohno, Takashi Yoneda, Yasuo Shirasaki
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Patent number: 7427319Abstract: The present invention relates to an azo compound represented by the following formula (1): (wherein, in the formula (1), R1 represents a hydrogen atom; a hydroxyl group; a carboxyl group; a (C1-C4)alkyl group which may be substituted by a hydroxyl group or a (C1-C4)alkoxy group; or the like, and A represents an aliphatic amine residue having a carboxyl group or a sulfo group, respectively;) or a salt thereof; an ink composition containing the same; and an inkjet recording method and a colored object using the same. Said azo compound has a high color value and has a hue between yellow and red or a brown hue. The ink containing said azo compound has satisfactory storage stability, and exhibits, when printed therewith, a stable ejection property even on a thermal type inkjet printer, and gives a print of high quality (superior in light fastness, ozone gas fastness and moisture fastness).Type: GrantFiled: June 21, 2005Date of Patent: September 23, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takashi Yoneda, Hiroaki Ohno, Yasuo Shirasaki
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Publication number: 20080193660Abstract: [Problems] A compound of a black ink which has such excellent fastnesses of a recorded article as light fastness, ozone gas fastness and moisture fastness, excellent solubility, and storage stability as a recording liquid, when used for inkjet recording and writing tools, and an ink composition comprising the same are provided. [Method for solving the problems] An azo compound represented by the following Formula (1) or a salt thereof, and an ink composition comprising the same (wherein, each of R1, R2, R5, R6 and R7 independently represents a hydrogen atom, a carboxyl group, a sulfo group and the like, each of R3 and R4 independently represents a hydrogen atom, a sulfo group, a nitro group, a (C1 to C4) alkyl group (which may be substituted by a hydroxyl group or a (C1 to C4) alkoxy group), a (C1 to C4) alkoxy group (which may be substituted by a hydroxyl group, a (C1 to C4) alkoxy group, a sulfo group or a carboxyl group) and the like, and n represents 0 or 1, respectively).Type: ApplicationFiled: November 10, 2005Publication date: August 14, 2008Inventors: Takahiko Matsui, Hiroaki Ohno, Yasuo Shirasaki
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Patent number: 7387668Abstract: An azo compound which is reduced in the copper ion content and exhibits hue and clarity suitable for ink-jet recording and which can give records having excellent light fastness, water resistance, and moisture proofness, and such ozone resistance as to control the fading and the discoloration; and water-base yellow inks containing the same.Type: GrantFiled: September 29, 2004Date of Patent: June 17, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hirokazu Kitayama, Yasuo Shirasaki, Takahiko Matsui, Hiroaki Ohno
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Patent number: 7326288Abstract: [PROBLEMS] To provide: a black compound which is for use in ink-jet recording or writing utensils, is excellent in ozone resistance, light resistance, moisture resistance, and color rendering, and gives a recording fluid having satisfactory storage stability; and an ink composition containing the compound. [MEANS FOR SOLVING PROBLEMS] The black compound is a trisazo compound represented by the following formula (1) or a salt thereof. (1) [In the formula (1), R1 and R2 each independently represents hydrogen, carboxy, sulfo, hydroxy, a C1-4 alkyl, C1-4 alkoxy, or sulfo group optionally substituted by C1-4 alkoxy, an optionally carboxylated C1-4 alkoxy group, etc.; and A represents phenyl or naphthyl (provided that the phenyl and naphthyl groups may be substituted by halogeno, carboxy, sulfo, sulfamonyl optionally substituted by alkyl or phenyl, nitro, etc.).Type: GrantFiled: November 26, 2004Date of Patent: February 5, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takahiko Matsui, Hiroaki Ohno, Takashi Yoneda, Yoshiaki Kawaida, Yasuo Shirasaki
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Patent number: 7297196Abstract: The present invention provides magenta dyestuff represented by the formula (1): (wherein symbols are as defined in the present description), with hue and vividness suitable to ink-jet recording, records excellent in fastness to light, gas, water and so on and a superior ink composition using said dyestuff.Type: GrantFiled: May 20, 2004Date of Patent: November 20, 2007Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hiroyuki Matsumoto, Katsunori Fujii, Yasuo Shirasaki, Takafumi Fujii, Yasuo Murakami
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Publication number: 20070257975Abstract: The present invention relates to an azo compound represented by the following formula (1): (wherein, in the formula (1), R1 represents a hydrogen atom; a hydroxyl group; a carboxyl group; a (C1-C4)alkyl group which may be substituted by a hydroxyl group or a (C1-C4)alkoxy group; or the like, and A represents an aliphatic amine residue having a carboxyl group or a sulfo group, respectively;) or a salt thereof; an ink composition containing the same; and an inkjet recording method and a colored object using the same. Said azo compound has a high color value and has a hue between yellow and red or a brown hue. The ink containing said azo compound has satisfactory storage stability, and exhibits, when printed therewith, a stable ejection property even on a thermal type inkjet printer, and gives a print of high quality (superior in light fastness, ozone gas fastness and moisture fastness).Type: ApplicationFiled: June 21, 2005Publication date: November 8, 2007Inventors: Takashi Yoneda, Hiroaki Ohno, Yasuo Shirasaki
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Publication number: 20070227388Abstract: The present invention relates to black coloring matter, and relates to a compound represented by the following formula (1): (wherein A and D independently represent an optionally substituted phenyl group or naphthyl group, respectively, and m and n represent 1 or 2, respectively), and the coloring matter for recording and an ink comprising the same. Said compound exhibits high solubility in a medium containing water as a main component, is stable even when an aqueous dye solution or an ink having a high concentration is prepared therefrom and is stored for a long period of time, has low color rendering property, exhibits colorless and neutral black, provides a printed image having high density and also provides a black recorded image being excellent in moisture fastness, light fastness and an ozone gas fastness, and further can be synthesized easily and can be produced at a low cost.Type: ApplicationFiled: May 9, 2005Publication date: October 4, 2007Inventors: Hiroaki Ohno, Takahiko Matsui, Takashi Yoneda, Yasuo Shirasaki, Yoshiaki Kawaida
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Publication number: 20070119341Abstract: An azo compound which is reduced in the copper ion content and exhibits hue and clarity suitable for ink-jet recording and which can give records having excellent light fastness, water resistance, and moisture proofness, and such ozone resistance as to control the fading and the discoloration; and water-base yellow inks containing the same. In particular, the azo compound represented by the formula (12) having a content of impurity copper ions of 100 ppm or below or salts thereof; and inks containing the same.Type: ApplicationFiled: September 29, 2004Publication date: May 31, 2007Inventors: Hirokazu Kitayama, Yasuo Shirasaki, Takahiko Matsui, Hiroaki Ohno
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Patent number: 7223301Abstract: The present invention provides magenta dyestuff represented by the formula (1): (symbols are as defined in the present description), with hue and vividness suitable to ink-jet recording, excellent fastness to light, gas, water and so on in records and an ink composition using said dyestuff.Type: GrantFiled: May 20, 2004Date of Patent: May 29, 2007Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hiroyuki Matsumoto, Katsunori Fujii, Yasuo Shirasaki, Takafumi Fujii, Yasuo Murakami, Noriko Kajiura
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Publication number: 20070107628Abstract: [PROBLEMS] To provide: a black compound which is for use in ink-jet recording or writing utensils, is excellent in ozone resistance, light resistance, moisture resistance, and color rendering, and gives a recording fluid having satisfactory storage stability; and an ink composition containing the compound. [MEANS FOR SOLVING PROBLEMS] The black compound is a trisazo compound represented by the following formula (1) or a salt thereof. (1) [In the formula (1), R1 and R2 each independently represents hydrogen, carboxy, sulfo, hydroxy, a C1-4 alkyl, C1-4 alkoxy, or sulfo group optionally substituted by C1-4 alkoxy, an optionally carboxylated C1-4 alkoxy group, etc.; and A represents phenyl or naphthyl (provided that the phenyl and naphthyl groups may be substituted by halogeno, carboxy, sulfo, sulfamonyl optionally substituted by alkyl or phenyl, nitro, etc.).Type: ApplicationFiled: November 26, 2004Publication date: May 17, 2007Inventors: Takahiko Matsui, Hiroaki Ohno, Takashi Yoneda, Yoshiaki Kawaida, Yasuo Shirasaki
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Publication number: 20070062413Abstract: The present invention provides magenta dyestuff represented by the formula (1): (wherein symbols are as defined in the present description), with hue and vividness suitable to ink-jet recording, records excellent in fastness to light, gas, water and so on and a superior ink composition using said dyestuff.Type: ApplicationFiled: May 20, 2004Publication date: March 22, 2007Inventors: Hiroyuki Matsumoto, Katsunori Fujii, Yasuo Shirasaki, Takufumi Fujii, Yasuo Murakami
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Publication number: 20060219131Abstract: The present invention provides magenta dyestuff represented by the formula (1): (symbols are as defined in the present description), with hue and vividness suitable to ink-jet recording, excellent fastness to light, gas, water and so on in records and an ink composition using said dyestuff.Type: ApplicationFiled: May 20, 2004Publication date: October 5, 2006Inventors: Hiroyuki Matsumoto, Katsunori Fujii, Yasuo Shirasaki, Takafumi Fujii, Yasuo Murakami, Noriko Kajiura