Patent application number | Description | Published |
20080260948 | INK AND INK JET RECORDING METHOD - An ink used in an ink jet recording method in which ink droplets are ejected from a recording head by the action of thermal energy to record an image on a recording medium; the ink being characterized by containing (a) a pigment, (b) a dispersing agent, (c) a liquid medium, (d) a polyglycerol and (e) at least one selected from a potassium salt of a carboxylic acid, a rubidium salt of a carboxylic acid and a cesium salt of a carboxylic acid. | 10-23-2008 |
20100165019 | INK JET RECORDING INK, INK JET IMAGE-FORMING METHOD AND INK JET RECORDING APPARATUS - The invention provides an ink jet recording ink containing a self-dispersion pigment, to the surface of which an anionic functional group represented by the following general formula (I) has been bonded directly or through another atomic group, water, a water-soluble substance having a coefficient of hydrophilicity-hydrophobicity of 0.37 or more as defined by the following equation (A) and a water-soluble substance having a coefficient of hydrophilicity-hydrophobicity of 0.25 or less as defined by the equation (A), and having a surface tension of 34 mN/m or less. | 07-01-2010 |
20100189902 | INK JET RECORDING INK, INK JET IMAGE-FORMING METHOD AND INK JET RECORDING APPARATUS - The invention provides an ink jet recording ink containing a self-dispersion pigment having a lactone group and a carboxyl group, an organic carboxylic acid salt, water and a water-soluble substance having a coefficient of hydrophilicity-hydrophobicity of 0.37 or more as defined by the following equation (A), and having a surface tension of 34 mN/m or less. | 07-29-2010 |
20100214351 | INK JET IMAGE-FORMING METHOD, INK JET COLOR IMAGE-FORMING METHOD AND INK JET RECORDING APPARATUS - An ink jet image-forming method for forming an image by applying an ink in a fixed amount of 0.5 pl or more to 6.0 pl or less to plain paper. The ink contains a self-dispersion pigment, water, a water-soluble compound having a coefficient of hydrophilicity-hydrophobicity of 0.37 or more as defined by the equation (A) stated in the description and a water-soluble compound having a coefficient of hydrophilicity-hydrophobicity of 0.25 or less, and has a surface tension of 34 mN/m or less. The application of the ink is divided into plural times when an image having a portion where the ink is applied in a duty of 80% or more and an amount of 5.0 μl/cm | 08-26-2010 |
20110023749 | COLORED PARTICLES - The present invention relates to colored particles containing a dye and a dispersant, wherein the average particle diameter of the colored particles is 10 nm or more, and 80 nm or less, the solubility index represented by Formula (1) of the dye is 9.20 or more, and the dye content and the dispersant content in the colored particles satisfy the relationship represented by Formula (2). | 02-03-2011 |
20110054094 | COLOR PARTICLES - In color particles containing a dye and a polymer compound, the average particle diameter of the color particles measured by a dynamic light scattering method is 10 to 80 nm, the content of the dye of the color particles is in the range of 60 to 90 percent by mass, and the dye has a solubility index of 7.50 or more in water having a pH of 6.0 to 11.0, the solubility index being represented by the following equation (1): Solubility Index=log(1/Aqueous Solubility of Dye [mol/L]). | 03-03-2011 |
20110205285 | INKJET RECORDING INK - An inkjet recording ink having a surface tension of 34 mN/m or more is provided. The inkjet recording ink contains an anionic self-dispersion pigment having an anionic functional group, a salt, and a water-soluble compound having a hydrophilicity/hydrophobicity coefficient of 0.26 or more. The ink contains a larger amount of cesium ion than the amount of the anionic functional group. The hydrophilicity/hydrophobicity coefficient is defined by equation (A). | 08-25-2011 |
20110227976 | INK JET RECORDING INK, INK JET IMAGE FORMING METHOD AND INK JET RECORDING APPARATUS - The invention provides an ink jet recording ink containing a self-dispersion pigment to a surface of which an anionic functional group represented by the following general formula (1) is bonded directly or through another atomic group, an ammonium salt of an organic carboxylic acid, water, and a water-soluble compound having a hydrophilicity-hydrophobicity coefficient of 0.26 or more as defined by the following equation (A), the ink having a surface tension of 34 mN/m or less, | 09-22-2011 |
20110234667 | INK JET IMAGE FORMING METHOD AND INK JET RECORDING APPARATUS - An ink jet image forming method, wherein an ink is applied to plain paper in a fixed amount of 0.5 to 6.0 pl, contains a self-dispersion pigment, an organic carboxylic acid salt, water and a water-soluble compound having a hydrophilicity-hydrophobicity coefficient of 0.26 or more, and has a surface tension of 34 mN/m or less, and when the total amount of inks applied to a fundamental matrix for forming an image is 5.0 pl/cm | 09-29-2011 |
20110239901 | COLORING PARTICLES - The present invention provides coloring particles containing a dye and a water-insoluble low-molecular-weight dispersant, wherein the average particle size of the coloring particles is 10 nm or more and 80 nm or less; the solubility parameter of the dye in water with a pH of 6.0 to 10.0 is 9.20 or more, the solubility parameter being represented by formula ( | 10-06-2011 |
20120127234 | AQUEOUS INK - The present invention relates to an aqueous ink having a surface tension of 34 mN/m or less including a self-dispersion pigment and water. In the aqueous ink, the self-dispersion pigment has a plurality of pKa values that are 8.0 or less. Assuming that the lowest pKa value among the plurality of pKa values is pKa | 05-24-2012 |
20120190788 | COLORING PARTICLES - Coloring particles contain a dye and a polymeric dispersant, and particles of the dye are coated on their surface with the polymeric dispersant. The average particle size of the coloring particles is in a range of 10 nm to 80 nm, inclusive, and the dye content is in a range of 60% by mass to 90% by mass, inclusive. The polymeric dispersant is insoluble in water of pH 6.0 to 8.0, inclusive, and the dye has a solubility parameter of equation (1) equal to or larger than 9.20 in water of pH 6.0 to 11.0, inclusive. | 07-26-2012 |
20120194621 | INK-JET RECORDING METHOD - Aspects of the present invention provide an ink-jet recording method including the step of applying an ink to a recording medium by discharging the ink from a recording head by action of thermal energy and the step of fixing the ink to the recording medium by heating the ink applied to the recording medium. The ink contains water, a self-dispersing pigment, and resin particles. The resin particles have a glass transition temperature of not less than 25° C., an average particle diameter of 70 nm or more and 220 nm or less, and an acid value of 25 mg KOH/g or more and 150 mg KOH/g or less. | 08-02-2012 |
20130222462 | INK JET IMAGE FORMING METHOD - An ink jet image forming method for forming an image including applying ink to a printing paper sheet using a recording head of an ink jet system. The ink contains a self-dispersion pigment, a polymer particle having a glass transition temperature of 25° C. or lower, and water and has a surface tension of 34 mN/m or less. When recording a line image having a recording density of 600 dpi or more and 4,800 dpi or less and a width of adjacent four pixels or more by conducting one scanning of the recording head, an amount of an ink droplet applied from the recording head is 0.6 pL or more and 6.0 pL or less, and an average ink application amount per unit area in the line image is 0.3 μL/cm | 08-29-2013 |
20140313265 | FILLING LIQUID FOR DISTRIBUTION OF INK JET HEAD, INK JET HEAD, AND DISTRIBUTION METHOD FOR INK JET HEAD - A filling liquid for distribution of an ink jet head of a thermal type, the filling liquid filling a nozzle flow path during distribution of the ink jet head, a hydrophilic region formed on a periphery of an ink discharge port having an opening area of from 100 to 350 μm | 10-23-2014 |