Abstract: A toner or two-component developer is provided. The toner includes toner base particles obtained by mixing in an aqueous medium a first resin particle dispersion, a colorant particle dispersion, and a wax particle dispersion, aggregating the mixed dispersion to form core particles at least part of which is melted, adding a second resin particle dispersion to a core particle dispersion in which the core particles are dispersed, and fusing the second resin particles with the core particles by heating. A GPC measurement of the second resin particles shows that the number-average molecular weight (Mn2) is 9000 to 30000, the weight-average molecular weight (Mw2) is 50000 to 500000, and the ratio (Mw2/Mn2) of the weight-average molecular weight (Mw2) to the number-average molecular weight (Mn2) is 2 to 10. The wax particles include at least a first wax and a second wax. An endothermic peak temperature (melting point Tmw1) of the first wax based on a DSC method is 50° C. to 90° C.

Abstract: A toner or two-component developer is provided. The toner includes toner base particles obtained by mixing in an aqueous medium a first resin particle dispersion, a colorant particle dispersion, and a wax particle dispersion, aggregating the mixed dispersion to form core particles at least part of which is melted, adding a second resin particle dispersion to a core particle dispersion in which the core particles are dispersed, and fusing the second resin particles with the core particles by heating. A GPC measurement of the second resin particles shows that the number-average molecular weight (Mn2) is 9000 to 30000, the weight-average molecular weight (Mw2) is 50000 to 500000, and the ratio (Mw2/Mn2) of the weight-average molecular weight (Mw2) to the number-average molecular weight (Mn2) is 2 to 10. The wax particles include at least a first wax and a second wax. An endothermic peak temperature (melting point Tmw1) of the first wax based on a DSC method is 50° C. to 90° C.

Abstract: Toner of the present invention includes aggregated particles formed by aggregating at least resin particles, pigment particles, and wax particles in an aqueous medium in the presence of a water-soluble inorganic salt. The wax includes at least one selected from the following: ester wax that has an iodine value of not more than 25, a saponification value of 30 to 300, and an endothermic peak temperature (melting point) of 50° C. to 100° C. based on a DSC method; and wax that is obtained by a reaction of alkyl alcohol having a carbon number of 4 to 30, unsaturated polycarboxylic acid or its anhydride, and synthetic hydrocarbon wax, and has an acid value of 1 to 80 mgKOH/g and an endothermic peak temperature (melted point) of 50° C. to 120° C. based on the DSC method.

Abstract: Toner of the present invention is produced by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wax particles are dispersed and heating and aggregating the mixed dispersion. The main component of a surface-active agent used for the resin particle dispersion is a nonionic surface-active agent. The main component of at least one surface-active agent selected from a surface-active agent used for the wax particle dispersion and a surface-active agent used for the colorant particle dispersion is a nonionic surface-active agent. With this configuration, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process.

Abstract: The present invention provides toner containing core particles prepared by mixing and aggregating in an aqueous medium at least a first resin particle dispersion in which first resin particles are dispersed, a colorant particle dispersion in which particles of colorant are dispersed and a wax particle dispersion in which particles of wax are dispersed. The colorant contains carbon black having a DBP oil absorption of 45 to 70 (ml/100 g) and the wax contains a wax having an endothermic peak temperature (referred to as melting point Tmw1 (° C.)) according the DSC method of 50 to 90° C. It is thus possible to prepare toner that has a small particle size and a sharp particle size distribution without requiring a classification process and that can prevent transfer void and toner scattering during transfer and obtain high transfer efficiency. The present invention provides also a method for producing the toner.

Abstract: Toner includes aggregated and associated particles formed by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wax particles are dispersed and heat-treating the mixed dispersion for aggregation. The aggregated and associated particles include first particles having a capsule structure in which aggregated wax with an average particle size of greater than 1 ?m is incorporated into the resin, and second particles formed of the resin and the wax in a mixed and dispersed state. The toner can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance and also can eliminate spent of the toner components on a carrier to make the life longer.

Abstract: Toner of the present invention includes aggregated particles formed by aggregating at least resin particles, pigment particles, and wax particles in an aqueous medium in the presence of a water-soluble inorganic salt. The wax includes at least one selected from the following: ester wax that has an iodine value of not more than 25, a saponification value of 30 to 300, and an endothermic peak temperature (melting point) of 50° C. to 100° C. based on a DSC method; and wax that is obtained by a reaction of alkyl alcohol having a carbon number of 4 to 30, unsaturated polycarboxylic acid or its anhydride, and synthetic hydrocarbon wax, and has an acid value of 1 to 80 mgKOH/g and an endothermic peak temperature (melted point) of 50° C. to 120° C. based on the DSC method.

Abstract: Toner of the present invention is produced by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wax particles are dispersed and heating and aggregating the mixed dispersion. The main component of a surface-active agent used for the resin particle dispersion is a nonionic surface-active agent. The main component of at least one surface-active agent selected from a surface-active agent used for the wax particle dispersion and a surface-active agent used for the colorant particle dispersion is a nonionic surface-active agent. With this configuration, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process.

Abstract: The invention provides a method for preparing an ink having constituents of a water-soluble dye having a water-soluble solubilizing group of at least one of a sulfonic group and a carboxyl group, water, a water-soluble substance that is condensation-polymerized in the absence of the water, a water-soluble medium and an additive including at least one of an organic acid salt and an inorganic acid salt. This method includes a first mixing step of mixing at least the dye and the water-soluble substance out of the constituents of the ink excluding the additive; a second mixing step of mixing a mixture obtained in the first mixing step and the additive; and a pH adjusting step, performed before the second mixing step, of preparing a solution including the mixture or a solution including the additive while adjusting the solution to a given pH range by using a pH adjuster.

Abstract: An ink-jet recording ink contains at least a colorant, a moisturizer, water and a water-soluble substance capable of undergoing polycondensation along with vaporization of the water, in which the colorant is a chelate azo dye.

Abstract: An ink composition is produced using a water-soluble substance that undergoes condensation polymerization in the absence of water (e.g., a hydrolyzable silane compound), which includes fluoroalkyl groups. Alternatively, a water-repellent film of a nozzle plate is subjected to a surface treatment with a trialkyl silane compound.

Abstract: An aggregation stabilizer is further added to an ink composition for inkjet recording which contains a colorant, a humectant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water. With this aggregation stabilizer, a hardly-soluble or insoluble component formed by the colorant and the water-soluble substance is modified so as to be readily dissolved in water, whereby generation of an aggregate in the ink is prevented.

Abstract: Toner includes aggregated and associated particles formed by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wax particles are dispersed and heat-treating the mixed dispersion for aggregation. The aggregated and associated particles include first particles having a capsule structure in which aggregated wax with an average particle size of greater than 1 ?m is incorporated into the resin, and second particles formed of the resin and the wax in a mixed and dispersed state. The toner can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance and also can eliminate spent of the toner components on a carrier to make the life longer.

Abstract: In ink containing a colorant, a humectant, a penetrant, water, and a water-soluble substance that is condensation-polymerized in the absence of the water (e.g., hydrolyzable silane compound), the surface tension of the ink at 25° C. before the water-soluble substance is condensation-polymerized is set to 20–50 mN/m, or the ink further contains a fluoroalkyl monoalcohol whose boiling point is lower than 100° C.

Abstract: A filler solution of the present invention, which is supplied to fill an inkjet head, contains water and a hydrolyzate of a silicon compound which has a hydrophilic group.

Abstract: Ink for ink-jet recording contains an oil soluble dye, a humectant, a penetrant, water, and an amphiphilic star block polymer of which the outer portion is hydrophilic. The surface tension of the ink at 25° C. is in the range of 20 to 50 mN/m.

Abstract: An ink composition containing a colorant, a humectant, water, and a water-soluble substance that begins to be condensation-polymerized as the water evaporates is ejected such that drops of the ink composition are adhered onto a print material 41 whose surface is acidic, whereby an image is formed on the print material 41.

Abstract: Toner of the present invention includes aggregated particles formed by aggregating at least resin particles, pigment particles, and wax particles in an aqueous medium in the presence of a water-soluble inorganic salt. The wax includes at least one selected from the following: ester wax that has an iodine value of not more than 25, a saponification value of 30 to 300, and an endothermic peak temperature (melting point) of 50° C. to 100° C. based on a DSC method; and wax that is obtained by a reaction of alkyl alcohol having a carbon number of 4 to 30, unsaturated polycarboxylic acid or its anhydride, and synthetic hydrocarbon wax, and has an acid value of 1 to 80 mgKOH/g and an endothermic peak temperature (melted point) of 50° C. to 120° C. based on the DSC method.

Abstract: In order to improve the water-resisting property of an image formed on a recording medium such as recording paper and plain paper by using an ink-jet recording ink, while also improving the light-resisting property of the image, an ink-jet recording ink, which contains a color material, water, a moisture-retaining agent, an organic silicon compound and an ultraviolet-ray absorbing agent, is allowed to contain an organic silicon compound in a range of 0.1 parts by weight to 50 parts by weight and an ultraviolet-ray absorbing agent in a range of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the ink. The ultraviolet-ray absorbing agent is at least one compound selected from the group consisting of benzophenone-based, benzotriazole-based, cyanoacrylate-based and oxalic acid anilide-based compounds.

Abstract: A method of contacting a substrate having a surface containing hydroxyl groups with a non-aqueous solution containing a material having a chrolosilyl group; washing if desired; coating the substrate with a non-aqueous solvent containing a compound having a fluorocarbon group and a chlorosilane group or a solvent containing a compound containing a fluorocarbon group and an alkoxysilane; and baking the substrate if necessary in order to form a fluorocarbon-based polymer coating film chemically bonded to the substrate surface. The hydroxyl groups on the substrate surface and chlorosilyl groups are reacted to form a thin film having a large number of silanol groups (—SiOH) capable of connecting the polymer coating film to the substrate to form a heat-, weather-, and wear-resistant film on various surfaces.