Patents by Inventor Duck Kyun Ahn
Duck Kyun Ahn 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: 8603717Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: GrantFiled: July 22, 2009Date of Patent: December 10, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8492060Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: GrantFiled: June 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8475995Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: GrantFiled: October 22, 2008Date of Patent: July 2, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8389188Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.Type: GrantFiled: October 22, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dong Won Kim, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
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Patent number: 8389196Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: GrantFiled: September 19, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8206884Abstract: A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.Type: GrantFiled: February 20, 2008Date of Patent: June 26, 2012Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Jae Bum Park, Il Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110159424Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: ApplicationFiled: June 4, 2009Publication date: June 30, 2011Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110116841Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: ApplicationFiled: July 22, 2009Publication date: May 19, 2011Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110076609Abstract: Provided are a toner containing a resin having wax properties and a method of preparing the toner. The toner includes a binder resin into which at least one residue of the group consisting of a C8-C60 higher fatty acid residue and a C8-C60 higher alcohol residue is introduced by esterification, a colorant, and at least one additive.Type: ApplicationFiled: May 19, 2009Publication date: March 31, 2011Inventors: Dae Il Hwang, Il Sun Hwang, Duck Kyun Ahn, Woo Young Yang
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Publication number: 20110033207Abstract: A toner using an organic solvent-insoluble resin and a method of preparing the same. The toner includes: a binder resin that comprises an organic solvent-insoluble resin and an acid group-containing resin, a coloring agent, and at least one additive, wherein the organic solvent-insoluble resin is a crosslinked polyester resin or a cyclic olefin co-polymer (COC) resin, and the ratio of the organic solvent-insoluble resin to the acid group-containing resin is in the range of 5:95 to 40:60 on a weight basis. The toner can be applied to an electrophotographic imaging apparatus.Type: ApplicationFiled: March 26, 2009Publication date: February 10, 2011Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Duck Kyun Ahn, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim
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Publication number: 20110028643Abstract: A wax-resin compatibilizer, a wax-resin dispersion, and methods of preparing the wax-resin dispersion. The wax-resin dispersion includes a wax, the wax-resin compatibilizer, and a second resin. The wax-resin dispersion may have a high wax content and excellent storage stability.Type: ApplicationFiled: March 30, 2009Publication date: February 3, 2011Applicant: Samsung Fine Chemicals Co., LtdInventors: Dae Il Hwang, Il Sun Hwang, Duck Kyun Ahn, Woo Young Yang
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Publication number: 20100272471Abstract: Provided are an electrophotographic toner and an electrophotographic image forming apparatus using the same. The electrophotographic toner includes: parent toner particles including a binder resin, a colorant, a releasing agent, and a charge control agent; and barium titanate external additives having an average primary particle diameter in the range of about 50 to about 150 nm, an average shape factor (SF1) in the range of about 100 to about 120, a shape factor in the range of about 0.96 to about 1, and an aspect ratio in the range of about 0.89 to about 1, and added to the surface of the parent toner particles.Type: ApplicationFiled: December 17, 2008Publication date: October 28, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Woo Young Yang, Keon II Kim, Dae II Hwang, Jae Bum Park, II Sun Hwang, Jun-Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100239972Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.Type: ApplicationFiled: October 22, 2008Publication date: September 23, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTD.Inventors: Dong Won Kim, Woo Young Yang, Keon II Kim, Dae II Hwang, II Hyuk Kim, Jae Bum Park, II Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
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Publication number: 20100232837Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: ApplicationFiled: October 22, 2008Publication date: September 16, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100216069Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: ApplicationFiled: September 19, 2008Publication date: August 26, 2010Applicant: Samsung Fine Chemicals Co. LTdInventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100098462Abstract: A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.Type: ApplicationFiled: February 20, 2008Publication date: April 22, 2010Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Jae Bum Park, Il Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100055599Abstract: A method of preparing a toner having a core-shell structure. The method includes: preparing a mixture by mixing a resin with acid groups, a coloring agent and at least one additive with an organic solvent, and neutralizing the acid groups of the resin with a base; forming a micro-suspension solution by adding the mixture to a dispersion medium; forming a toner core by removing the organic solvent from the micro-suspension; and forming a toner complex having a core-shell structure by seed-polymerizing at least one monomer on the surface of the toner core. Thus, the toner that can prevent hot offsets, improve storage stability at a high temperature and improve charge stability against environment changes can be prepared with reduced costs according to the method.Type: ApplicationFiled: February 20, 2008Publication date: March 4, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Woo Young Yang, Keon li Kim, Dae Ii Hwang, Jae Bum Park, Ii Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn