Patent application number | Description | Published |
20100159386 | METHOD FOR PRODUCING DEVELOPING AGENT - A method for producing a developing agent, wherein in the formation of aggregated particles, particles in a dispersion liquid have a volume average particle diameter of 2 μm or less when the pH of the dispersion liquid is 7, and also the pH of the dispersion liquid is from 3.0 to 6.9 when the zeta potential of the particles is −30 mV. | 06-24-2010 |
20100173079 | EMULSION TYPE INKJET INK - One embodiment of the invention is an emulsion type inkjet ink including water, a pigment, an emulsifier, and an alcohol compound in which the alcohol compound is dispersed in water with the emulsifier. The emulsifier is a polyoxyethylene sorbitan fatty acid ester compound, and the alcohol compound is a compound including an aromatic ring and having a boiling point of 180° C. or higher. | 07-08-2010 |
20100209840 | DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME - As a first dispersion liquid containing first fine particles and a second dispersion liquid containing second fine particles, those satisfy the relationship represented by the following formula (1) are used, and these two dispersion liquids are mixed with each other, and an aggregating agent and a pH adjusting agent are added thereto in sequence, whereby encapsulation is achieved by selective formation of core particles through aggregation of the first fine particles and shells through aggregation of the second fine particles. | 08-19-2010 |
20100310981 | DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME - According to one embodiment, a method for producing a developing agent includes pulverizing a mixture in the form of coarse particles of a toner material including a coloring agent and a binder resin by mechanical shearing, aggregating and fusing the resulting fine particles. The solid content concentration in a dispersion liquid including the aggregated particles is from 5.0% to 40.0%, the volume average particle diameter of the aggregated particles is from 1.0 μm to 10.0 μm, and the ratio of the standard deviation to the volume average particle diameter is 30.0% or less. | 12-09-2010 |
20110014558 | DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME - According to one embodiment, a method for producing a developing agent including aggregating fine particles of a toner material containing a binder resin and a coloring agent in a dispersion liquid in which the fine particles are dispersed in an aqueous medium to form aggregated particles, and washing the aggregated particles and drying the washed aggregated particles, forming toner particles is provided. An electrical conductivity of the toner particles is measured by a toner electrical conductivity evaluation method. A sample toner is prepared by adhering an additive to surfaces of the toner particles, and a content ratio of a sodium element to a carbon element in a region to which the additive is not adhered of the toner is measured. The washing of the toner particles is repeated until each of the measurement values becomes a predetermined reference value or less. | 01-20-2011 |
20110109687 | INKJET EMULSION INK - According to one embodiment, an inkjet emulsion ink includes coloring material, an aqueous liquid, an oil liquid, and a polyvinyl alcohol. The aqueous liquid accounts for 10 to 40% by weight of the inkjet emulsion ink, the oil liquid accounts for 60 to 90% by weight of the inkjet emulsion ink. At least a part of the oil liquid is an aromatic alcohol represented by general formula A. The polyvinyl alcohol accounts for 0.1 to 3% by weight of the inkjet emulsion ink and is represented by general formula B. The viscosity of an aqueous solution containing 4% by weight of the polyvinyl alcohol at 20° C. is less than 10 mPa·s. | 05-12-2011 |
20110148977 | INKJET EMULSION INK - According to one embodiment, an inkjet emulsion ink includes an aqueous liquid, a color pigment dispersed in the aqueous liquid, an oil liquid, a white pigment dispersed in the oil liquid, and polyvinyl alcohol. The aqueous liquid content of the inkjet emulsion ink is W | 06-23-2011 |
20110148978 | INKJET EMULSION INK - According to one embodiment, an inkjet emulsion ink includes a pigment, an aqueous liquid, an oil liquid, and a polyoxyethylene hydrogenated castor oil. The polyoxyethylene hydrogenated castor oil emulsifies the aqueous liquid and the oil liquid. The oil liquid is at least partly an aliphatic monoalcohol having 6 to 9 carbon atoms. | 06-23-2011 |
20110259238 | AQUEOUS PIGMENT INK - According to one embodiment, an aqueous pigment ink includes water, a pigment, and a water-soluble polymeric compound. The pigment is contained in the aqueous pigment ink in an amount of less than 5 wt %. The aqueous pigment ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: | 10-27-2011 |
20110261107 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes water and a pigment. The pigment is contained in the aqueous inkjet ink in an amount of less than 5 wt %. The queous inkjet ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: | 10-27-2011 |
20110261108 | DECOLORIZABLE WATER-BASED INKJET INK - According to one embodiment, a decolorizable water-based inkjet ink includes a color material, a solvent, and a nonionic surfactant. The color material contains a color developable compound and a color developing agent, and the solvent contains water and a water-soluble organic solvent. The nonionic surfactant is contained in the ink in an amount of 5 wt % or more of the total amount of the solvent. | 10-27-2011 |
20110273515 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a dispersion medium that contains water and a water-soluble polyhydric alcohol having a weight average molecular weight of 400 or more, and a pigment. The pigment accounts for less than 5 mass % of the total amount of the aqueous inkjet ink. The aqueous inkjet ink has viscosities (mPa·s) measured using a cone-plate type viscometer at 20 rpm and satisfying the following relationships: | 11-10-2011 |
20110279514 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes water in an amount of from 15 to 50% by mass of the total amount of the ink, a glycol mixture in an amount of from 34 to 80% by mass of the total amount of the ink, and a pigment in an amount of from 2 to 20% by mass of the total amount of the ink. The glycol mixture contains 40 to 70% by mass of propylene glycol, with the remainder being isoprene glycol. | 11-17-2011 |
20110279515 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a color material, water as a first liquid, propylene glycol as a second liquid, and a compound represented by the following general formula (PEG) or a compound represented by the following general formula (PGC) as a third liquid. The aqueous inkjet ink has a water activity of 0.85 or less. | 11-17-2011 |
20120013676 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a pigment in an amount of 2 to 20% by mass of the total amount of the aqueous inkjet ink, and a dispersion medium in which the pigment is dispersed. The dispersion medium contains water in the amount of 53 to 94% by mass, with the remainder of the dispersion medium being a compound represented by the following general formula 1. The water accounts for 50 to 80% by mass of the total amount of the aqueous inkjet ink. | 01-19-2012 |
20120033010 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a color material in an amount of 2 to 20% by mass of the total amount of ink, water in an amount of 41 to 70% by mass of the total amount, and a water-soluble organic solvent in an amount of 20 to 53% by mass of the total amount. The solvent contains a compound represented by the following general formula 1 which accounts for 20 to 50% by mass of the total amount of ink. When the amount of compound is equal to the amount of solvent, the total amount of solvent is the compound, and the sum of the amounts of the color material, the water, and the solvent is 100% by mass or less of the ink. | 02-09-2012 |
20120062644 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of 29-49% by mass of the total amount. The soluble organic solvent contains a compound represented by the following general formula 1 which accounts for 10-36% by mass of the total amount of ink. When the amount of the compound is equal to the amount of the solvent, the total amount of the solvent is the compound. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. | 03-15-2012 |
20120062645 | AQUEOUS INKJET INK - According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of from 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of from 29-49% by mass of the total amount. The water-soluble organic solvent contains a compound represented by the following general formula 1, and the compound represented by the following general formula 1 accounts for 10-35% by mass of the total amount of the ink. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. | 03-15-2012 |
20120328977 | TONER AND PROCESS FOR PRODUCTION THEREOF - Encapsulated toner particles are formed by: aggregating core material particles containing at least a colorant and a core material resin in an aqueous dispersion medium to form core particles; adding coating resin particles into the aqueous dispersion medium during progress of the formation of the core material at a point of time when the volume-based median particle diameter of the core particles formed by the aggregation reaches 30 to 83% of that of desired toner particles; and continuing the aggregation to form a coating layer composed of a composite aggregate of the core material particles and the coating resin particles on the core material. In the thus-obtained toner, the colorant is uniformly and well incorporated in the toner particles, and therefore, the coloring ability is improved without causing a problem of release of fine powder. | 12-27-2012 |
20130011775 | TONER AND PROCESS FOR PRODUCTION THEREOF - Disclosed is a toner obtained by coating surfaces of core particles including at least a binder resin having a carboxyl group and a coloring agent with successive coatings of a water-soluble crosslinking agent capable of crosslinking with a carboxyl group and a water-soluble polymer having a carboxyl group, which have been successively applied on the core particles and crosslinked with each other. The thus-formed toner is provided with a good harmony of favorable fixability represented by a low lowest fixable temperature and favorable storage stability represented by little aggregation after standing at 50° C. for 8 hours. | 01-10-2013 |
20130011776 | ERASABLE TONER AND PROCESS FOR PRODUCTION THEREOF - Disclosed is a decolorable toner produced by aggregating dispersed fine particles of a color material containing at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles containing at least a binder resin having a carboxyl group, then adding a compound having a carbodiimide group or an epoxy group reactive with the carboxyl group of the binder resin, and thereafter fusing the aggregate particles, respectively in an aqueous medium. The thus obtained decolorable toner can suppress the generation of fine powder by the release of erasable color material fine particles from the toner particles. | 01-10-2013 |
20130011777 | DECOLORABLE TONER AND PROCESS FOR PRODUCTION THEREOF - Disclosed is a process for production of a decolorable toner, including: aggregating dispersed fine particles of a color material comprising at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles comprising at least a binder resin comprising a polyester resin to form aggregates in an aqueous medium, adding a reactive polymer having an oxazoline group in to the aqueous medium, and fusing the aggregates in the aqueous medium. As a result, it becomes possible to produce a decolorable toner which suppresses the generation of fine powder due to the release of fine particles of an erasable color material from the toner. | 01-10-2013 |
20130137031 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE SAME - An electrophotographic toner produced by mixing a dispersion of colorant particles containing a colorant and a dispersion of release agent particles containing a release agent and having a volume average particle diameter smaller than that of the colorant particles, aggregating the colorant particles and the release agent particles in the dispersion to produce first aggregates, mixing a dispersion of resin particles containing a binder resin and having a volume average particle diameter smaller than that of the release agent particles in the dispersion containing the first aggregates, and aggregating the first aggregates and the resin particles in the dispersion of the first aggregates and the resin particles to coat the first aggregates with the resin particles, producing second aggregates. | 05-30-2013 |
20130196264 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE SAME - A decolorizable electrophotographic toner, including: toner particles, the toner particle comprising a binder resin; and colorant particles which contain an electron donating color developable agent, an electron accepting color developing agent, and a decolorizing temperature control agent, and have a capsule structure coated with an outer shell, wherein
| 08-01-2013 |
20140064750 | DEVELOPER AND TEST METHOD THEREOF - A color-fadable developer contains a binder resin, a color generation compound and a color developing agent. When the developer is heated from a temperature range of 0° C. to 20° C. to a temperature range of 150° C. to 180° C. at a temperature increase rate range of 5° C./min to 10° C./min a first time and a second time, a first differential scanning calorimetry curve based on a measurement by differential scanning calorimetry during the first heating has an endothermic peak that is missing from a second differential scanning calorimetry curve based on a measurement differential scanning calorimetry during the second heating, and has a different peak than the endothermic peak caused by a glass transition point of a binder resin. | 03-06-2014 |
20140199626 | METHOD OF MANUFACTURING ERASABLE TONER - According to one embodiment, a method of manufacturing an erasable toner includes washing toner particles including therein a coloring material that is erasable by heating and a binder resin to obtain a toner cake having the amount of water of 20% by weight to 60% by weight, and drying the toner cake at 40° C. or more and at a temperature which is lower than the complete color erasing temperature of the toner particles by 30° C. or more. | 07-17-2014 |
20140212805 | DECOLORIZABLE TONER - Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components. | 07-31-2014 |
20140234768 | TONER AND METHOD FOR PRODUCING THE SAME - Provided is a method for producing a toner including: aggregating colorant particles and release agent particles, thereby forming aggregates containing the colorant particles and the release agent particles; aggregating binder resin particles and the obtained aggregates containing the colorant particles and the release agent particles, thereby forming toner particle precursors; and aggregating and fusing the obtained toner particle precursors, thereby forming toner particles, wherein when the average circularity of the toner particles is represented by Rt, Rt satisfies the following formula (1): 0.85≦Rt≦0.92 (1). | 08-21-2014 |