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Dae Woong Choi, Daejeon-City KR

Dae Woong Choi, Daejeon-City KR

Patent application numberDescriptionPublished
20100216069METHOD OF PREPARING TONER - 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.08-26-2010
20100232837TONER HAVING CORE-SHELL STRUCTURE AND METHOD OF PREPARING THE SAME - 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.09-16-2010
20100239972TONER USING RESIN HAVING ACTIVE HYDROGEN-CONTAINING GROUP AND METHOD OF PREPARING THE SAME - 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.09-23-2010
20110033207TONER USING RESIN BEING INSOLUBLE IN ORGANIC SOLVENTS AND METHOD FOR PREPARING THE SAME - 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.02-10-2011
20110116841TONER HAVING MULTIPLE INFLECTION POINTS ON STORAGE MODULUS CURVE WITH RESPECT TO TEMPERATURE AND METHOD OF PREPARING THE SAME - 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.05-19-2011
20110159424METHOD OF FORMING TONER IMAGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS CAPABLE OF REALIZING WIDE COLOR GAMUT - 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 −37.06-30-2011
20120244467TONER FOR ELECTROSTATIC USE - Toner particles having excellent cleaning properties and glossing properties. The toner particles include a binder resin, a releasing agent, and a colorant, wherein toner particles satisfy the following conditions.09-27-2012
20120301819TONER HAVING EXCELLENT BLOCKING RESISTANCE AND FLOWABILITY, AND METHOD FOR PRODUCING SAME - Provided is a toner having excellent blocking resistance and flowability. The toner comprises a binder resin, a releasing agent, a colorant and an external additive, wherein the toner particles satisfy expression (1):11-29-2012

Patent applications by Dae Woong Choi, Daejeon-City KR