Abstract: A toner composition and a method of making a toner composition wherein toner particles having an average size in the range of 1-25 ?m may be mixed with large fumed silica particles sized 70 nm to 120 nm and medium fumed silica particles sized 30 nm to 60 nm and optionally alumina particles surface treated with an inorganic/organic compound. The large sized fumed silica particles are present in the range of 0.1% to 2% by weight of the toner composition. The medium sized fumed silica particles are present in the range of 0.1% to 2% by weight of the toner composition. The alumina particles surface treated with an inorganic/organic compound may be present in the range of 0.01% to 1.0% by weight of the toner composition.

Abstract: A method for producing a positively chargeable toner, including: step 1: melt-kneading a toner raw material composition containing a resin binder, a positively chargeable charge control agent, and fine fluororesin particles, and a recycled powder; step 2: cooling a melt-kneaded mixture obtained in the step 1, and pulverizing a cooled mixture; and step 3: classifying a pulverized product obtained in the step 2, wherein the resin binder in the toner raw material composition contains 50% by mass or more of a polyester having a softening point of 125° C. or higher and 170° C. or lower. The positively chargeable toner obtainable by the method of the present invention is suitably used in developing latent images formed in, for example, an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: A process for making a latex by phase inversion emulsification in an agitated reactor column is described.

Abstract: Toner compositions that having spherical particles and provide stable density. The toner compositions also comprise and deliver a silicone oil to the cleaning subsystem in the image forming apparatus by incorporating an inorganic fine powder additive package that has been mixed with silicone oil in a manner such that the toner is blended with the inorganic fine powder and silicone oil.

Abstract: A process includes adding a particulate toner additive to toner particles to form a slurry, filtering the slurry to form a filter cake, the particulate toner additive functioning as a filtration aid, and washing the filter cake, after the washing step the toner particles have a portion of the particulate toner additive adhered thereto, and de-agglomerating/drying the toner particles with the additive, after the drying step the toner particles have a portion of the particulate toner additive adhered thereto.

Abstract: Disclosed is an decolorizable electrophotographic toner, containing a binder resin, an electron-donating color-developable agent, and a wax having a color-developing action and having an acid value of 60 mgKOH/g or more.

Abstract: A production process of a toner, wherein wet colored resin particles are poured into a rotary vane type agitating device having a structure that an agitating vane fixed to a rotating drive shaft extending through a bottom wall of an agitation vessel is arranged at a bottom of the agitation vessel, and at least one gas inlet port and at least one gas outlet port are arranged at a lower portion of the agitation vessel and an upper portion of the agitation vessel, respectively, the wet colored resin particles are dried by a method, in which the wet colored resin particles are agitated by the rotary vane within the agitation vessel while supplying a heated gas, thereby forming a fluidized bed, and a mixed gas containing water is discharged from the gas outlet port to the outside, and at that time, drying conditions are controlled in such a manner that the temperature of the gas discharged falls within a range from 20 to 60° C.

Abstract: A process is disclosed for the preparation of developer compositions comprising: providing a first developer including carrier and a first toner comprised of resin, pigment, polyolefin, a first compatibilizer, a first charge control agent, and a first metal oxide surface additive; and, adding thereto a second developer including carrier, and a second toner, second compatibilizer, a second charge control agent, and a second metal oxide surface additive.

Abstract: The present disclosure provides a process for the preparation of developer compositions comprising: a first developer comprised of carrier and toner comprised of resin, pigment, polyolefin, compatibilizer, charge control agent, and metal oxide surface additive, and adding thereto a second developer comprised of carrier, and second compatibilizer, charge control agent, and metal oxide surface additive. The second developer can be directly dispensed into a developer housing.

Abstract: To provide a toner A containing: base particles, each containing polyester, microcrystalline wax, and a colorant; and spherical silica particles having an average primary particle diameter of 100 nm to 150 nm, wherein the microcrystalline wax has an onset temperature of 45° C. to 60° C. as determined by DSC, and a carbon number distribution of 25 to 55.

Abstract: Disclosed is an decolorizable electrophotographic toner, containing a binder resin, an electron-donating color-developable agent, and a wax having a color-developing action and having an acid value of 60 mgKOH/g or more.

Abstract: The present disclosure provides a process for the preparation of developer compositions comprising: a first developer comprised of carrier and toner comprised of resin, pigment, polyolefin, compatibilizer, charge control agent, and metal oxide surface additive, and adding thereto a second developer comprised of carrier, and second compatibilizer, charge control agent, and metal oxide surface additive. The second developer can be directly dispensed into a developer housing.

Abstract: The continuous process for manufacturing toners disclosed herein includes continuously feeding components of a toner composition into a feed section of a screw extruder at a controlled rate. The continuous process for manufacturing toners may include feeding the components of a toner composition into the feed section of a screw extruder without performing an external or secondary dispersion step. That is to say, the components of the toner composition may be fed directly into the extruder without using dispersions of individual components as used in batch processes. Rather, the toner components are added to the extruder in dry form, melt-mixed, and may be dispersed in aqueous form in the extruder. The process may produce micron-sized toner particles, thus no further size reduction may be necessary.

Abstract: A continuous emulsion aggregation process for the production of particles is presented including a plurality of continuous stirred-tank reactors (CSTR). The plurality of continuous stirred-tank reactors includes a first reactor and a second reactor for facilitating an aggregation process; a third reactor for facilitating a shell addition process; a fourth reactor for facilitating a freeze process; a fifth reactor for facilitating a chelating process; a sixth reactor for facilitating a ramp-up process; and a seventh reactor for facilitating a coalescence process. The reactors are sequentially assembled in a series configuration, each of the reactors cooperating with an overhead stirrer. In other embodiments, a CSTR system of the present disclosure possesses five reactors sequentially assembled in a series configuration to form toner particles.

Abstract: A method of preparing a developer includes mixing a carrier and a powder with each other while falling with gravity.

Abstract: A method for producing dry toner particles that have similar particle size and shape characteristics as chemically produced toners. The method includes melt-mixing a toner resin with a colorant and, optionally, a wax, to form a toner; grinding the toner to form toner particles; classifying the toner particles into particles averaging 4 to 10 microns in size; blending the classified toner particles with additives in a high-speed blender; and then processing the mixture with optional additional surface additives in a conical mixer. The method produces toner particles that have high circularity and sharper particle size distribution. The surface processing of the toner particles does not affect the internal constituents of the toner particles.

Abstract: Metallic dry toner particles are prepared by dry blending resin particles with non-conductive metal oxide particles to form a dry blend. This dry blend is melt extruded under low shear conditions to form an extruded composition that is broken up into metallic dry toner particles. Each metallic dry toner particle consists essentially of a polymeric binder phase formed from the resin particles, and the non-conductive metal oxide particles dispersed within the polymeric binder phase. The metallic dry toner particles have a mean volume weighted diameter (Dvol) before fixing of 15 ?m to 40 ?m, and the non-conductive metal oxide particles are present in an amount of 20 to 50 weight %. The ratio of the metallic dry toner particle Dvolto the average equivalent circular diameter (ECD) of the non-conductive metal oxide particles in the metallic dry toner particles is greater than 0.1 and to 10.

Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.

Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.

Abstract: The invention relates to a toner for developing a toner image, the toner comprising a binder resin, an inorganic component and a wax. The wax is finely dispersed within the toner and has a melting transition, wherein the lower temperature limit of the melting transition is between 110° C. and 140° C. at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. The invention further relates to a printing system for applying the toner according to the present invention on an image receiving medium. The invention further relates to a method for preparing the toner according to the present invention.

Abstract: A toner composition including at least one phosphorescent pigment that absorbs energy released by natural or artificial light, and is able to be seen in a dark environment through luminescence of a certain color created by the energy released as light, and a method of forming and using the toner are described. The phosphorescent toner has a particle size in the range of about 15-40 microns, which allows the toner to have the ability to absorb and then release the needed amount of light energy to be noticeable in a dark environment.

Abstract: A toner for electrostatic image development containing a resin binder and a releasing agent, wherein the resin binder contains a polyester A having a furan ring, and wherein the releasing agent contains an ester wax, and a method for producing the toner. The toner for electrostatic image development of the present invention can be suitably used in, for example, the development or the like of latent image formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: A method for producing a toner including the step of melt-kneading a mixture containing a resin binder and a wax with a twin-screw kneader, wherein the resin binder contains three kinds of a resin R1, a resin R2 and a resin R3 having different softening points to each other, wherein the wax contains at least two kinds of a wax W2 and a wax W3 having different melting points to each other, wherein the softening points of R1, R2 and R3 and the melting point W2 meet certain relationships, and wherein the mixture is supplied to the twin-screw kneader in an amount of from 1.3 to 5.0 kg/hr·cm2 per unit cross-sectional area of the screw. The toner obtainable by the method of the present invention can be suitably used in, for example, the development or the like of latent image formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: An erasable electrophotographic toner includes a binder resin, a near-infrared absorbing material, a decolorizing agent and an organic white pigment.

Abstract: The invention relates to a toner for developing a toner image, the toner comprising a binder resin, a colorant, a first wax and a compatibilizer. The wax is finely dispersed within the toner. The compatibilizer has a melting transition, wherein the lower temperature limit of the melting transition is between 110° C. and 140° C. at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. The invention further relates to a printing system for applying the toner according to the present invention on an image receiving medium. The invention further relates to a method for preparing the toner according to the present invention.

Abstract: A toner containing toner base particles and an external additive, wherein regions with different tribocharging polarities with respect to a magnetic carrier are present in a domain-matrix structure on the surface of the toner base particles. The island region B has a predetermined height, the external additive has a reverse polarity to the region B in terms of tribocharging polarity to the magnetic carrier, the external additive contains a first external additive having a number-average primary particle size of 80-150 nm and a second external additive having a number-average primary particle size of 10-60 nm, and an average coverage Cb (%) with the first external additive in the region B is 27-100% and a coverage Ca (%) with the first external additive in the sea region A is 12% or less.

Abstract: Method for producing structured particles specifically nanoparticles, toners for laser printers and photocopiers, particularly chemical toner with particular product properties. The method produces toners of improved performance. Method relates particularly to the selection and properties of the base materials and utilizing these properties to design the toner product properties that result in improved performance.

Abstract: The present invention provides a process for producing a colored toner having a textured surface, the process includes forming a polymer composition of at least one polymer and a colorant, where the at least one polymer has a softening temperature from about 60° C. to about 160° C.; forming an aqueous mineral suspension of at least one multivalent metal phosphate; forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition; heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and increasing the pH to above 7.0; cooling the dispersion including the dispersed particles of the polymer composition to a temperature of from about 1° C. to about 89° C.; and recovering the particles.

Abstract: A toner capable of ensuring cleanness and the amount of specific charge for extended periods of time and having excellent charge stability and fixing property, a two-component developer, a developing device and an image forming apparatus are provided. A toner includes toner particles containing at least a binding resin and a coloring agent, and fine silicon-containing oxide particles having an average primary particle size of not smaller than 70 nm but not larger than 150 nm and containing water in an amount of not larger than 2.0% by weight, the fine silicon-containing oxide particles being externally added to the toner particles.

Abstract: A polymer expanded particle and an expanded toner having small pores, and a production method thereof are provided. A polymer expanded particle comprises micropores having an average pore diameter of less than 50 ?m. An expanded toner comprises micropores having an average pore diameter of 1 ?m to less than 3 ?m, wherein volume average particle diameter is 5 ?m to less than 15 ?m. A method for producing a polymer expanded particle comprises a first step for mixing specific polymer particles with high pressure gas or supercritical fluid, to prepare a mixture, a second step for impregnating with the high pressure gas or the supercritical fluid to the inside of the polymer particles, and a third step for reducing pressure and temperature of the mixture, to form the polymer expanded particle, wherein the pressure and temperature in the third step is reduced for 5 minutes or less from a state of 20 MPa or greater and 60° C. or greater to a state of less than 1 MPa and less than 30° C., respectively.

Abstract: Provided is a toner for an electrostatic charge image development having toner particles which contain: a binder resin; a colorant; and a compound represented by Formula (1) in an amount of 0.1 to 65 ppm based on the total weight of the toner particles: wherein R1 and R2 each respectively represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group.

Abstract: The present disclosure provides processes for producing toners. In embodiments, alkyl or alkyl ether sulfates are used in a solvent-free toner production process as surfactants to provide for higher parent particle charge without adversely affecting particle size, distribution control and circularity of the toner particles. The present disclosure also provides a new formulation and process for the emulsification of polyester resins to form nano-scale particles dispersed in water (latex) without the use of organic solvents by an extrusion process.

Abstract: Provided is a toner for an electrostatic charge image development having toner particles which contain: a binder resin; a colorant; and a compound represented by Formula (1) in an amount of 0.1 to 65 ppm based on the total weight of the toner particles: wherein R1 and R2 each respectively represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group.

Abstract: A method for producing a developing agent contains mechanically shearing a mixture containing a polyester resin, a colorant and a releasing agent to form first fine particles, aggregating the first fine particles to form aggregated particles as a core, aggregating second fine particles containing a polyester resin onto the core to form a shell.

Abstract: An additive package is provided for use with toners. The additive package may be utilized with ultra low melt toners formed by emulsion aggregation processes. The additive package of the present disclosure provides toners with a low minimum fusing temperature to enable high speed printing. Toners possessing the additive package of the present disclosure also possess wide fusing latitude, good release, high gloss, high blocking temperature, robust particles, excellent triboelectric charge properties, and the like.

Abstract: An erasable toner is prepared by mixing colored particles containing at least a color former compound, a color developer agent and a binder resin with de-coloring particles having a melting point higher than the fixing temperature of the colored particles. By using this toner, a colored image is formed by electrostatically transferring a toner image onto a medium, and heating the toner image at a temperature lower than the melting point of the de-coloring particles to form a fixed toner image in a color developed state, and the color of the fixed image is erased by heating the image to a temperature not lower than the melting point of the de-coloring particles. In this toner, the color developing function and the color erasing function are assigned to different particles so that the functions are separated from each other, and therefore, the formation of an image in a color developed state and the erasure thereof can be reliably and promptly achieved.

Abstract: A toner for electrostatic latent image development is disclosed, comprising colored particles containing a binder resin and a colorant, and an external-additive, wherein the external additive comprises boron nitride particles exhibiting a number average primary particle size of 10 to 500 nm. The production method of the toner is also disclosed.

Abstract: According to one embodiment, a color erasable coloring material containing a binder resin, and dispersed therein, a color developable compound and a color developing agent is provided. The color developing agent to be used in the coloring material contains at least an aminohydroxy derivative. The aminohydroxy derivative is obtained by subjecting a starting material selected from a benzene ring compound having a hydroxy group and a heterocyclic compound having a hydroxy group to nitration, hydrogenation, and alkylation.

Abstract: The invention provides a method and an apparatus for manufacturing a developer, which can manufacture a developer having a uniform and fine particle shape in a narrow particle size distribution and having a coloring agent highly dispersed therein at the primary particle level, the method and apparatus at the same time enabling continuous and efficient production without opening and closing a reactor. The method comprises the steps of: dissolving a binding resin component in a supercritical or subcritical fluid so that the binding resin component is blended with a coloring agent component; and reducing the solubility of the binding resin component in the supercritical or subcritical fluid so that the binding resin component is precipitated in the form of particles with the coloring agent component dispersed in the interior thereof.

Abstract: A process for preparing a mixed color toner obtained by mixing two or more kinds of color toners of which each color is different, including the following steps (1) and (2): (1) determining zeta potential distributions of each of the color toners, and (2) mixing the color toners in combination so that an overlapping ratio of the zeta potential distributions is 70.0% or more; a mixed color toner obtainable by the process; a two-component developer containing the toner; and a method of forming fixed images using the toner. The mixed color toner obtainable by the present invention is used for, for example, developing a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.

Abstract: A developer comprised of a toner and at least one external surface additive, wherein an acid-base interaction has an Interaction Surface Parameter (ISP) of greater than 0, and wherein ISP is defined by the following equation: [(Ka)toner×(Kb)additive]+[(Kb)toner×(Ka)additive]?[(Ka)toner×(Ka)additive]?[(Kb)toner×(Kb)additive], wherein Ka is the Lewis acid value and Kb is the Lewis base value.

Abstract: The toner of the present invention, comprising a colored resin particle and an external additive, wherein said external additive contains a silica fine particle (A) having a Dv50/Dv10 of 1.8 or more, in which Dv10 represents a particle diameter at which a volume cumulative total from small particle diameter side is 10% and Dv50 represents a particle diameter at which the mentioned volume cumulative total is 50%, a volume average particle diameter in the range from 0.1 to 1.0?, and a sphericity in the range from 1 to 1.3. The toner of the present invention cause less fog, and excellent resolution on the printed image, excellent in cleaning property, and cause less filming.

Abstract: A bio-toner for use in electrophotographic image forming that contains a bio-resin component that is at least partially derived from a renewable resource is provided. A method of making the bio-toner that contains a bio-resin component for use in electrophotographic image forming is also provided. A method for electrophotographic image formation using the bio-toner that contains a bio-resin is also provided.

Abstract: A system and method for producing toner associated with a selectable gloss level is provided. The method includes holding a first toner formed of particles, associated with a relatively low gloss level, and having two particle properties, each having a first and second characteristic, respectively, and holding a second toner formed of particles, associated with a relatively high gloss level, and having the two particle properties, each having a third and fourth characteristic, respectively. The first and third and the second and fourth characteristics are substantially the same. The first and second toners are transported and a ratio of their respective volumes is determined so that when blended a third toner is produced which is associated with a selected gloss level that is in-between the low and high gloss levels. The transporting is controlled in accordance with the determined ratio.

Abstract: A toner composition and method of providing such composition which may be used in a printer or printer cartridge. The composition may include toner particles mixed with silica particles having a primary particle size in the range of 30 nm to 60 nm present in the range of 0.1 to 2.0% by weight of the toner composition and silica particles having a primary particle size in the range of 60 nm to 150 nm present in the range of 0.1 to 2% by weight of the toner composition.

Abstract: A process for creating custom colors including: creating a plurality of neutral gray scale primary components of varying darkness levels; selecting one or more non-gray scale primary components; and combining one or more of the plurality of neutral gray scale primary components with the one or more non-gray scale primary components; the plurality of neutral gray scale primary components are compatible with dry blending techniques of the one or more non-gray scale primary components in order to shift a hue of a designated target primary.

Abstract: The present invention relates to a color toner for a nonmagnetic mono-component printing system that improves the printing characteristics, and a preparation method thereof. More specifically, the present invention provides a color toner including a first coating layer and a second coating layer formed on a toner mother particle, wherein the first coating layer contains coated organic powders where two kinds of organic powders are coated with each other, and the second coating layer contains coated inorganic powders where silica and titanium dioxide are coated with each other. The color toner of the present invention has a narrow charge distribution, good image density, high transfer efficiency, excellent long-term stability, and reduced PCR contamination, thereby being good for use in high speed color printers, etc., employing a direct type or a tandem type of transfer system.

Abstract: A process for preparing a toner comprising the steps of (1) pulverizing a pulverized product of a composition comprising a resin binder and a colorant with a jet type pulverizer in the presence of fine inorganic oxide particles, to give an upper limit cut-off classification powder; and (2) classifying the upper limit cut-off classification powder with a classifier, the classifier comprising a classifying rotor comprising a driving shaft arranged in one casing as a central shaft thereof in a vertical direction, and a stationary spiral guiding vane arranged to share the same central shaft as the classifying rotor, wherein the stationary spiral guiding vane is arranged in a classification zone on an outer circumference of the classifying rotor with a given spacing to the outer circumference of the classifying rotor.

Abstract: A toner for developing a latent electrostatic image including a base of toner particle which contains a binder resin and a coloring agent, and an external additive. Herein, a plurality of the base of toner particle has a volume average particle diameter (Dv) of 3 ?m to 7 ?m, a ratio (Dv/Dn) of the volume average particle diameter (Dv) to a number average particle diameter (Dn) is 1.01 to 1.25, a plurality of the base of toner particle contains 15% by number or less of the base of toner particle having a particle diameter of 0.6 ?m to 2.0 ?m, a plurality of the base of toner particle has a circularity of 0.930 to 0.990 on average, the binder resin contains a modified polyester resin, and the toner contains 0.3 parts by weight to 5.0 parts by weight of the external additive, relative to 100 parts by weight of the base of toner particle.

Abstract: A toner and process for making the toner wherein each combined resin and colorant particle has an average size less than about 10 microns and wherein the surface additive particles averaging less than about 40 nanometers in size average greater than two (2) percent of the combined weight of resin and colorant in the toner and wherein the Additive Adhesion Force Distribution percent value after 12 kilojoules of energy is greater than 40 percent.