Abstract: A toner for electrostatic image development containing a resin binder, a negatively chargeable charge control agent, and a positively chargeable charge control agent, wherein the resin binder contains at least one polyester, wherein a carboxylic acid component of the polyester contains isophthalic acid and/or an ester thereof and fumaric acid and/or an ester thereof, provided that if two or more polyesters are used, the carboxylic acid component is taken as an overall component, and wherein the negatively chargeable charge control agent contains a metal-containing azo dye and/or a metal complex of salicylic acid, and wherein the toner has a softening point of from 90° to 120° C. The toner for electrostatic image development of the present invention can be suitably used in developing latent images formed in, for example, electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: A transparent toner for developing an electrostatic latent image includes toner particles containing a binder resin; and an external additive containing cerium oxide, in which a content of cerium in all toner particles is from 0.05% by weight to 0.20% by weight, the cerium oxide contains a praseodymium, and a content of praseodymium in all toner particles is from 0.001% by weight to 0.050% by weight.

Abstract: A latent electrostatic image developing carrier including a carrier core material, and a coating layer containing a resin and provided on a surface of the carrier core material, wherein the coating layer includes a particulate material containing at least first fine conductive particles and second fine conductive particles, and wherein the first fine conductive particles and the second fine conductive particles satisfy the relationships expressed by Expressions 1 and 2, 3?D1/D2?15 . . . Expression 1, where D1 denotes a dispersed particle diameter of the first fine conductive particles and D2 denotes a dispersed particle diameter of the second fine conductive particles, and ?7E?R1×R2?8E . . . Expression 2, where R1 denotes a powder specific resistance of the first fine conductive particles and R2 denotes a powder specific resistance of the second fine conductive particles.

Abstract: A toner composition includes resin core particles having outer surfaces, and surface treatment, wherein the surface treatment includes at least first metal oxide particles having a surface area equivalent average particle diameter of greater than 25 nm and a surface energy of less than 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., tacked to the outer surfaces of the resin core particles, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area, and wherein the toner composition comprises less than 0.013 g non-tacked surface treatment per square meter of resin core particles outer surface. A developer for developing electrostatic images includes magnetic carrier particles and toner as described above, wherein the developer comprises less than 0.

Abstract: The invention provides a toner for developing an electrostatic image including toner particles having a shape factor SF1 of 110 or more and including a binder resin, and particles of an external additive that adhere to the toner particles, wherein the particles of the external additive including first particles, and second particles which are adhered to the first particles and have a primary particle size of 0.2 times to 0.5 times as large as that of the first particles, and in an image obtained by observing the particles of the external additive with a microscope, when the projection surface area of the first particle is defined as S1 and the total of the projection surface areas of the second particles which are not hidden by the first particle is defined as S2, S2 being from 0.1 times to 0.5 times as large as S1.

Abstract: Provided is a toner in which faulty transfer under an extremely-low-temperature, low-humidity environment hardly occurs, including toner particles and a zeolite as an external additive, in which a ratio of the alminium atoms to a total of the silicon atoms and the aluminium atoms contained in the zeolite is 0.2 to 24.0%.

Abstract: A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a second polymer binder; and a borax coupling agent between the core and the shell.

Abstract: The present disclosure relates to polymer particles comprising a polymer matrix having a coating of an inorganic semimetal oxide or metal oxide, wherein the polymer matrix has at least one first functional group A and at least one second functional group B, both functional groups A and B being able to enter into at least one covalent bond with one another, functional group A being selected from the group consisting of an azide group, C—C double bond, C—C triple bond, aldehyde group, ketone group, imine group, thioketone group and thiol group, and functional group B being selected from the group consisting of a C—C double bond, C—C triple bond, C—N triple bond, diene group, thiol group and amine group.

Abstract: Disclosed is a toner composition comprising: (a) resin particles; and (b) strontium titanate particles having an average particle diameter of at least about 400 nm.

Abstract: An electrostatic image developing toner contains a binder resin and at least two different kinds of white pigments, wherein from about 10% by weight to about 30% by weight of the at least two kinds of white pigments is porous titanium oxide having a volume average particle diameter of from about 0.01 ?m to about 1 ?m, a particle size distribution (volume average particle size distribution index GSDv) of from 1.1 to 1.3 and a BET specific surface area of from about 250 m2/g to about 500 m2/g.

Abstract: This invention provides metal oxide particles surface-treated with a cyclic silazane and a hydrophobicity-imparting agent, methods of making such, and toner compositions comprising the same.

Abstract: The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.

Abstract: It is an object of the present invention to provide a toner having the transfer efficiency and the cleanability in combination, exhibiting excellent stress resistance, and ensuring the low-temperature fixing. A toner characterized in that the average circularity of the above-described toner is 0.960 or more, and 0.985 or less, where the average circularity is analyzed by dividing particles having a circle equivalent diameter of 1.98 ?m or more, and 200.00 ?m or less, the number A of toners having a circularity of 0.990 or more, and 1.000 or less is 25.0 percent by the number or less, and the percentage of the number of particles B having a circle equivalent diameter of 0.50 ?m or more, and 1.98 ?m or less relative to the total particles of 0.50 ?m or more, and 200.00 ?m or less is 10.0 percent by the number or less.

Abstract: A toner for developing a latent electrostatic image produced by suspension polymerizing a polymerizable monomer composition in an aqueous dispersion medium, wherein the polymerizable monomer composition contains a polymerizable monomer, a colorant, and a layered inorganic mineral in which at least a part of an interlayer ion is replaced with an organic ion, and a process cartridge and an image forming method using the toner.

Abstract: A toner for electrostatic image development containing an external additive comprising composite oxide particles made of titania and silica (external additive A), and hydrophobic silica particles (external additive B), wherein the external additive A has a core-shell structure in which a core portion is made of titania and a shell portion is made of silica, wherein the titania is contained in the external additive A in an amount of from 75 to 95% by weight, and wherein the external additive B has a carbon content of from 2.8 to 6.0% by weight. The toner for electrostatic image development of the present invention is 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: Toner for electrophotography contains toner base particles containing a binder resin, a colorant, and a wax, resin particles containing a binder resin and a wax, but substantially not containing a colorant, and an external additive that is externally added to the toner base particles and the resin particles, with a mean domain diameter of the wax in the resin particles being larger than a mean domain diameter of the wax in the toner base particles.

Abstract: A developer has a molecular weight distribution of its tetrahydrofuran soluble portion measured by a gel permeation chromatography. In the molecular weight distribution, the main peak is in a range from 2×103 to 3×104 weight-average molecular weight (Mw), the shoulder peak is in a range from 200 to 500 Mw, and a half-value width of the main peak is equal to or less than 50000. A glass-transition temperature Tg of the developer is a range from 55° C. to 80° C.

Abstract: An image is formed with an electrostatic latent image-developing toner that includes toner base particles and titanium oxide serving as an external additive. The toner base particles containing a binder resin, a colorant, and a charge control agent. The titanium oxide is attached to surfaces of the toner base particles and containing titanium oxide A and titanium oxide B. Each of the titanium oxide A and the titanium oxide B has a predetermined particle diameter and a predetermined volume resistivity. The liberation rate of each of the titanium oxide A and the titanium oxide B in the toner is within a predetermined range.

Abstract: Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D50 of 0.1 ?m or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010?SD?0.040??(1) where SD=(D84?D16)/2, where D84 represents the particle diameter (?m) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (?m) at a point of 16% in the cumulative volume particle size distribution curve.

Abstract: A toner for electrostatic image development containing (a) a toner matrix particle containing a resin binder, and (b) an external additive added to the toner matrix particles, wherein the resin binder contains a polyester A obtained by polycondensing an alcohol component and a carboxylic acid component containing isophthalic acid and/or an ester thereof, and wherein the external additive contains fine silica particles containing a metal or a metal oxide; and A method of forming fixed images including the step of applying the toner for electrostatic image development to an image-forming apparatus according to a non-contact fusing method. The toner for electrostatic image development of the present invention is suitably used in developing latent images formed in, for example, electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.

Abstract: According to an embodiment, provided is a developer, which is used for a full-color image forming apparatus, wherein the developer includes a monochrome toner and a color toner, each including a coloring material, an amorphous polyester resin, a crystalline polyester resin, and an ester wax which includes ester compounds having an alkyl group and also having a carbon number of from 32 to 48, the amorphous polyester resin to be blended in the monochrome toner has a melting point (Tm2) of from 140 to 155° C. and the amorphous polyester resin to be blended in the color toner has a melting point (Tm1) of from 115 to 130° C., and the Tm1 and the Tm2 satisfy the following formula (1): 10(° C.)?Tm2?Tm1?40(° C.).

Abstract: A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and HMDS silica. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry theological properties. These improved properties make this toner composition useful for higher speed printing while using less toner.

Abstract: Coated phosphorescent pigments are provided which may be utilized in toner compositions. In embodiments, the phosphorescent pigment may be coated by a powder coating process. The large pigment particles may be dry blended with dried resin latex particles, thereby coating the pigment surface, followed by heating and shearing in a rotary kiln or extruder to melt the toner resin and fuse it to the pigment surface. The resulting coated particles may be utilized with other toners, in embodiments color toners, to provide phosphorescent images.

Abstract: The present invention relates to a polymerized toner and a method for preparing the same, wherein the toner can realize an excellent offset feature, high transfer efficiency, and a uniform image and thus can exhibit excellent performances in the applications of high speed copying, development of transferred photos, etc.

Abstract: A toner set is composed of toners of a plurality of colors that are used in a tandem-type color image forming apparatus. Each of the toners of a plurality of colors includes toner base particles and an external additive. The external additive includes small-diameter silica particles and large-diameter silica particles larger than the small-diameter silica particles. When, of the toners of a plurality of colors, three color toners to be used consecutively for forming the toner image are defined as a first toner, second toner and third toner respectively in order of usage thereof, the average particle diameter of the large-diameter silica particles contained in the second toner is smaller than the average particle diameter of the large-diameter silica particles contained in the first toner and is larger than the average particle diameter of the large-diameter silica particles contained in the third toner.

Abstract: A toner composition that includes at least one low molecular weight amorphous polyester resin, at least one high molecular weight amorphous polyester resin, at least one crystalline polyester resin, at least one wax, at least one biocide and at least one colorant, and wherein the toner composition has a minimum fusing temperature of from about 100° C. to about 125° C.

Abstract: An image forming method including charging an image bearing member by applying combination of DC voltage and AC voltage with frequency of 6.5 to 8.5 cycle/mm; irradiating the image bearing member with light to form an electrostatic image; developing the electrostatic image with a developer including toner to form a toner image; transferring the toner image onto a receiving material; fixing the toner image; cleaning the image bearing member with a blade; then applying a lubricant to the image bearing member; and then spreading the lubricant with a spreading member countering the image bearing member. The toner includes toner particles granulated in an aqueous medium; and at least three kinds of external additives including a first particulate hydrophobic silica, a particulate hydrophobic titanium oxide and a second particulate hydrophobic silica respectively having BET specific surface areas of 20 to 40 m2/g, 40 to 80 m2/g, and 130 to 300 m2/g.

Abstract: The present invention relates to a polymerized toner prepared by suspension polymerization. In particular, the polymerized toner comprises a plurality of toner particles that each comprising a binder resin, a pigment, a pigment stabilizer, a charge control agent, and a wax. The polymerized toner maintains a ratio of toner particles containing at least two wax domains per particle within a defined range. Thereby, the polymerized toner achieves high glossiness and good transfer efficiency.

Abstract: A natural oil-based toner resin for producing toner in developing electrophotographic image comprising a copolymer of unsaturated polyester resins and vinyl monomers, wherein the polyester resins have a molecular weight of 500 to 30000 and obtained from polycondensation between a polycarboxylic acid, a natural oil or derivative thereof and a polyol. The toner resin in emulsion form is mixed with fine suspensions or emulsions of a colourant and a charge control agent; and a flocculating agent is incorporated therein to induce aggregation for forming particles of desired sizes, and subsequently the temperature is suitably raised to cause coalescence to produce raw toner particles of regular shape and smooth surface. The raw toner particles are washed and dried, and treated with suitable additives to produce the finished product of chemically produced toner.

Abstract: The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.

Abstract: A process for adhering surface treatment to toner resin core particles includes: providing resin core particles including a binder polymer having a Tg and having outer surfaces; providing surface treatment including at least first metal oxide particles having an average particle size of greater than 25 nm and a surface energy of less than or equal to 28 erg/cm2, as determined by methanol wettability midpoint at 22° C., and tacking the at least first metal oxide particles to the resin core particles by mixing at a temperature greater than the Tg of the binder polymer. Preferably, the surface treatment is tacked to the outer surfaces of the resin core particles at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area.

Abstract: 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): 2.0?RD/TD?2.5 ??(1), where RD is the real density of the toner particles and TD is the tap density of the toner particles.

Abstract: A magenta electrostatic developing toner includes binder resin particles that do not contain a coloring agent or a release agent and has a shape factor SF1 of about 110 or less, the number of the binder resin particles being about 50 or less per 5,000 electrostatic developing toner particles; and inorganic particles that have a median diameter of about 5 nm to about 70 nm in an amount of about 0.01 mass % to about 0.4 mass % based on the mass of the electrostatic developing toner; and a magenta coloring agent that has an azo group.

Abstract: A positively-chargeable toner for developing electrostatic images which can prevent damage of photosensitive members and filming due to an external additive, can impart a stable charge property and flowability to toner particles over time, and thus hardly causes deterioration of image quality due to fog, blur, white streaks or the like, and therefore is excellent in printing durability even if continuous printing of plural prints is performed is provided. A positively-chargeable toner for developing electrostatic images of the present invention is a positively-chargeable toner for developing electrostatic images comprising colored resin particles containing a colorant and a binder resin, and an external additive, wherein the external additive contains magnesium silicate having negatively charging ability, with a Mohs hardness of 3 or less and a number average primary particle diameter in the range from 1 to 15 ?m.

Abstract: A toner comprising toner particles, wherein a surface-treated titanate compound is contained on the surface of parent toner particles comprising a resin and a colorant, and the titanate compound having a carbon amount of not less than 0.15% by mass and not more than 0.50% by mass.

Abstract: The present disclosure provides toners and processes for making said toners. In embodiments, the toners are invisible when viewed under natural light, but possess a UV additive that renders them visible when exposed to UV light of a specific wavelength. By selecting the appropriate UV additive and ionic crosslinker, with optional chelating agent, the gloss of the toner may be tailored to match the gloss of any substrate, such as paper, to which the toner is to be applied, thereby further enhancing its invisibility under visible light.

Abstract: There is provided a toner for electrophotography containing at least a binder resin, a colorant and a barium compound, and having a relaxation modulus G(t) of from about 2.0×102 Pa to about 3.0×103 Pa in a relaxation time of t=10×Dt (wherein Dt is the heating time taken during fixing) as determined by the measurement of dynamic viscoelasticity, and a barium content of from about 0.1% to about 0.5% with respect to the total amount of constituent atoms in the toner as determined by X-ray fluorescence.

Abstract: Presently described are methods of inhibiting water vapor adsorption of a powder and methods of storing a powder at increased humidity level. The methods comprise providing adding discrete hydrophobic nanoparticles to a plurality of particles.

Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.

Abstract: A toner including a binder resin, a colorant, and a release agent is provided. The toner has a peak loss tangent (tan ?) value of 3 or more within a temperature range of 80 to 160° C. Here, the loss tangent (tan ?) is a ratio (G?/G?) of a loss elastic modulus (G?) to a storage elastic modulus (G?). The toner provides a good combination of low-temperature fixability, hot offset resistance, storage stability, coloring power and/or opacifying power, and gloss.

Abstract: This invention provides a toner with improved charge and charge stability by suitable addition of extra particulate additives (EPA) such as aluminum cerium oxide and/or cerium zirconium oxide. The additives may be combined with toner in a conical mixer having selected temperature control. The invention also provides toner which may provide reduced print quality defects such as ghosting or residual image and fade-to-color.

Abstract: A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m2/g and contains particles in a rectangular parallelepiped shape and wherein the hydrophobic silica contains hydrophobic silica A that has at least a BET specific surface area of 150-300 m2/g and the surface of which has been treated with an aminosilane and hexamethyldisilazane and hydrophobic silica B that has at least a BET specific surface area of 90-150 m2/g and the surface of which has been treated with hexamethyldisilazane.

Abstract: The disclosure provides an electrophotographic toner and methods for preparing the electrographic toner. The electrographic toner includes a binder, a colorant and a releasing agent, wherein the electrophotographic toner includes strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein, if [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, then the [Sr]/[Fe] ratio is in the range of about 5.0×10?1 to about 4.5, the [Ti]/[Fe] ratio is in the range of about 5.0×10?1 to about 8.1×10?1, and the [Si]/[Fe] ratio is in the range of about 2.0×10?3 to about 4.0×10?3.

Abstract: The electrostatic charge image developing toner includes a colorant containing rutile type and anatase type titanium oxides, and a binder resin.

Abstract: The present invention is directed to surface treatment of toner particles and the toner developers used for the dry development of electrostatic charge images.

Abstract: A toner whose flowability, chargeability and fixing property are enhanced, a developer, a developing device and an image forming apparatus are provided. The toner comprises a toner particle in which a shell layer is formed on a surface of a core particle, and external additive, where (1) the shell layer is formed in a film on the surface of the core particle, (2) a shape factor SF-2 is 120 or more and 140 or less, and (3) a BET specific surface area measured by the BET method is 1.2 m2/cm3 or more and 4.0 m2/cm3 or less. The developer containing such a toner is filled into the developing device in the image forming apparatus in order to form an image.

Abstract: Disclosed is a toner for developing an electrostatic charge image, including a toner particle coated with a combination of sol-gel silica particles, hydrophobically surface-treated fumed silica particles, and hydrophobically surface-treated titanium dioxide particles.

Abstract: There is provided a toner which contains at least a binder resin, and filler including a layered inorganic compound, wherein the layered inorganic compound is cleaved to form particles in the toner, and the particles have a breadth of 0.5 nm to 4 nm, and a length of 10 nm to 90 nm.

Abstract: A toner for electrostatic image development containing an external additive comprising composite oxide particles made of titania and silica (external additive A), and hydrophobic silica particles (external additive B), wherein the external additive A has a core-shell structure in which a core portion is made of titania and a shell portion is made of silica, wherein the titania is contained in the external additive A in an amount of from 75 to 95% by weight, and wherein the external additive B has a carbon content of from 2.8 to 6.0% by weight. The toner for electrostatic image development of the present invention is 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.