Patents by Inventor Yukiko Kawakami
Yukiko Kawakami 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: 7858670Abstract: A photosensitive inkjet ink is provided, which includes a photo-acid generating agent, pigment, and an organic dispersion medium containing at least two kinds of polymerizable compounds selected from the group consisting of an oxetane compound and a vinyl ether compound, at least one kind of the polymerizable compounds being a monofunctional compound at a concentration of 20 to 70% based on a total weight of the organic dispersion medium, and the vinyl ether compound at a concentration of 30% or more based on a total weight of the organic dispersion medium. The vinyl ether compound is selected from the following chemical formula.Type: GrantFiled: February 8, 2007Date of Patent: December 28, 2010Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Yukiko Kawakami, Kazuhiko Ohtsu, Toru Ushirogouchi, Mitsuru Ishibashi
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Patent number: 7803851Abstract: An inkjet ink is provided, which includes a pigment dispersion containing an organic dispersant, a black pigment having an average particle diameter of not more than 200 nm, and a resinous dispersing agent, the organic dispersant being formed of at least one polymerizable compound, and the black pigment being included therein at an amount ranging from 2 to 30% by weight based on the organic dispersant, and an ionic compound. A ?-potential of the black pigment to the at least one polymerizable compound of the organic dispersant is confined within the range of ?10 mV to +100 mV.Type: GrantFiled: February 21, 2006Date of Patent: September 28, 2010Assignee: Toshiba Tec Kabushiki KaishaInventors: Mitsuru Ishibashi, Toru Ushirogouchi, Hiroshi Kiyomoto, Ryozo Akiyama, Kazuhiko Ohtsu, Yukiko Kawakami, Masashi Hiroki
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Patent number: 7473720Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p (wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).Type: GrantFiled: December 7, 2006Date of Patent: January 6, 2009Assignee: Toshiba Tec Kabushiki KaishaInventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami
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Patent number: 7375145Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p ??(1) (Wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).Type: GrantFiled: October 20, 2004Date of Patent: May 20, 2008Assignee: Toshiba Tec Kabushiki KaishaInventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami
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Publication number: 20070270520Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p (wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).Type: ApplicationFiled: December 7, 2006Publication date: November 22, 2007Inventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami
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Publication number: 20070202437Abstract: A photosensitive composition is provided, which includes a cationic photopolymerization initiator, and an organic dispersion medium containing at least two kinds of polymerizable compounds selected from the group consisting of an oxetane compound and a vinyl ether compound represented by the following general formula (1), at least one of the polymerizable compounds being a monofunctional compound: R11—R12—(R11)p ??(1) wherein R11s are individually a group selected from the group consisting of a vinyl ether group, a vinyl ether skeleton-bearing group, an alkoxy group, a substituted hydroxyl group and hydroxyl group, at least one of R11s being a vinyl ether group or a vinyl ether skeleton-bearing group, R12 is a (p+1)-valent group having a substituted or unsubstituted cyclic skeleton or aliphatic skeleton, and p is a positive integer including zero.Type: ApplicationFiled: February 8, 2007Publication date: August 30, 2007Inventors: Mitsuru Ishibashi, Toru Ushirogouchi, Hiroshi Kiyomoto, Ryozo Akiyama, Yukiko Kawakami, Kazuhiko Ohtsu
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Publication number: 20070185224Abstract: A photosensitive inkjet ink is provided, which includes a photo-acid generating agent, pigment, and an organic dispersion medium containing at least two kinds of polymerizable compounds selected from the group consisting of an oxetane compound and a vinyl ether compound, at least one kind of the polymerizable compounds being a monofunctional compound at a concentration of 20 to 70% based on a total weight of the organic dispersion medium, and the vinyl ether compound at a concentration of 30% or more based on a total weight of the organic dispersion medium. The vinyl ether compound is selected from the following chemical formula.Type: ApplicationFiled: February 8, 2007Publication date: August 9, 2007Inventors: Ryozo Akiyama, Hiroshi Kiyomoto, Yukiko Kawakami, Kazuhiko Ohtsu, Toru Ushirogouchi, Mitsuru Ishibashi
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Publication number: 20070101898Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p??(1) (Wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).Type: ApplicationFiled: December 7, 2006Publication date: May 10, 2007Inventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami
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Publication number: 20060189715Abstract: An inkjet ink is provided, which includes a pigment dispersion containing an organic dispersant, a black pigment having an average particle diameter of not more than 200 nm, and a resinous dispersing agent, the organic dispersant being formed of at least one polymerizable compound, and the black pigment being included therein at an amount ranging from 2 to 30% by weight based on the organic dispersant, and an ionic compound. A ?-potential of the black pigment to the at least one polymerizable compound of the organic dispersant is confined within the range of ?10 mV to +100 mV.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventors: Mitsuru Ishibashi, Toru Ushirogouchi, Hiroshi Kiyomoto, Ryozo Akiyama, Kazuhiko Ohtsu, Yukiko Kawakami, Masashi Hiroki
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Publication number: 20060189716Abstract: A dispersion for ink is provided, which includes a dispersion medium, powder or pigment having an average particle diameter of not more than 300 nm, a polymer dispersing agent containing a first resinous dispersing agent and a second resinous dispersing agent, and an ionic compound. A mixing amount of the powder or pigment is 2% to 60% based on a total weight of the dispersion medium, a mixing amount of the first resinous dispersing agent is 1% to 60% based on a total weight of the powder or pigment, the second resinous dispersing agent is a resin having a basic terminal and a mixing amount of the second resinous dispersing agent is 1% to 30% based on a total weight of the powder or pigment, and a mixing amount of the ionic compound is 0.01% to 40% based on a total weight of the dispersion medium.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventors: Toru Ushirogouchi, Ryozo Akiyama, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Masashi Hiroki, Yukiko Kawakami
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Publication number: 20060114305Abstract: Disclosed is a method of exposure-curing an ink layer formed on a recording medium. The layer is made of an ink comprising at least one solvent polymerizable by an acid, a photo-acid generating agent capable of generating the acid as irradiated with light, and a colorant component. This method comprises two irradiation steps. In the first irradiation, the ink layer is irradiated with light by using a light source having a first peak illuminance. The acid is thereby generated from the photo-acid generating agent. The diffusion of the acid is promoted in the layer, curing the ink layer to some extent. In the second irradiation, the ink layer is irradiated with light by using a light source having a second peak illuminance higher than the first peak illuminance. More acid is generated from the photo-acid generating agent and diffuses in the layer, completely curing the ink layer.Type: ApplicationFiled: February 23, 2005Publication date: June 1, 2006Inventors: Kazuhiko Ohtsu, Toru Ushirogouchi, Ryozo Akiyama, Hiroshi Kiyomoto, Mitsuru Ishibashi, Masashi Hiroki, Yukiko Kawakami
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Publication number: 20060021537Abstract: There is proposed a method of curing an electromagnetic radiation-curing type liquid composition comprising a solvent polymerizable in the presence of an acid, and a photo-acid generating agent which is dissolved in the solvent and capable of generating the acid when irradiated with electromagnetic radiation.Type: ApplicationFiled: July 1, 2005Publication date: February 2, 2006Inventors: Kazuhiko Ohtsu, Toru Ushirogouchi, Ryozo Akiyama, Hiroshi Kiyomoto, Mitsuru Ishibashi, Masashi Hiroki, Yukiko Kawakami
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Publication number: 20050113476Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p ??(1) (Wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).Type: ApplicationFiled: October 20, 2004Publication date: May 26, 2005Inventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami