Abstract: In a method for manufacturing a polymerized toner, in a washing step after polymerization, colored polymer particles are washed using a continuous pressurizing filter in a circulation washing manner, in which a dispersion containing colored polymer particles obtained in the polymerization step is supplied by pressure to the inlet of the continuous pressurizing filter from a slurry tank that stores the dispersion; the dispersion is filtered in the filter while stirring; the concentrated dispersion is fed back to the slurry tank from the outlet; a washing solution in a quantity equivalent to the quantity of the filtrate filtered by filtration is added to the slurry tank to dilute the filtrate; and the dispersion diluted by the washing solution is circulated in the filter.

Abstract: The invention provides a toner for developing electrostatic latent images containing at least a binder resin, a colorant, a releasing agent, and a graft polymer that has been made by graft polymerization of a resin matrix and a macromonomer including at least one group selected from the group consisting of a hydroxyl group, a hydroxyalkyl group, and a pyrolidonyl group, and a production method thereof. The invention further provides an electrostatic latent image developer using the toner, an image forming method using the toner, and an image forming apparatus.

Abstract: A toner for developing an electrostatic image of the present invention contains toner particles obtained by forming coagulated particles by mixing a resin particle dispersion solution containing dispersed resin particles and a coloring agent dispersion solution containing dispersed coloring agent particles and fusing the coagulated particles by heating them and is characterized in that at least the surfaces of the toner particles have a chemical structure formed by reaction with a compound having a carbodiimido group. The invention also provides a resin particle dispersion solution to be used for the production of toner.

Abstract: Disclosed is a method of manufacturing toner comprising the steps of adding oil-droplets containing a radically polymerizable monomer into an associated particle dispersion formed by association-fusing resin particles and colorant particles, and forming a shell by coating a resin produced via polymerization on a surface of the associated particle by polymerizing the radically polymerizable monomer in the associated particle dispersion, wherein a hydrophilicity degree of the resin contained in the shell is larger than a hydrophilicity degree of a resin contained in the associated particle.

Abstract: A developing agent includes a toner particle containing a binder resin including a first polyester resin synthesized from an aromatic monomer and an aliphatic monomer blended with a molar ratio in an alcohol component being satisfied with the relationship of {(aromatic monomer)>(aliphatic monomer)?0} and with a molar ratio in an acid component being satisfied with the relationship of {(aliphatic monomer)>(aromatic monomer)}, a release agent, and a coloring agent.

Abstract: In a process for producing toner particles by granulation carried out in an aqueous medium, a process for producing toner particles is provided which toner particles have a sharp particle size distribution and can achieve a high image density. In a process for producing toner particles to be obtained by granulating in an aqueous medium a colorant composition containing at least a colorant, an apparatus which forms the toner particles by granulation has a granulation tank and a stirrer, and, where the internal volume of the granulation tank is represented by A (L) and the volume of an air layer portion in the interior of the granulation tank by B (L), the air layer portion proportion B/A satisfies the following expression (1): 0.05?B/A??(1).

Abstract: A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2): B?14 when 155<A?180; and B?0.6A?79 when 145?A?155,??(1) wherein A represents a shape factor SF-1 of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 ?m; and B?14 when 0.920?A??0.950; and B?394?400A? when 0.950<A??0.965??(2) wherein A? represents an average circularity of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 ?m.

Abstract: The present invention aims to provide a method of producing a polymerized toner which is small in an amount of a microparticle produced as a by-product and an amount of a polymerizable monomer remained, generates no filming upon printing and is excellent in printing durability, and provides a method of producing a polymerized toner comprising the steps of: (A) preparing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant; (B) obtaining a polymerizable monomer composition dispersion by adding the polymerizable monomer composition in an aqueous medium containing a dispersion stabilizer, thereby to form droplets of the polymerizable monomer composition; and (C) obtaining a colored polymer particle by heating the polymerizable monomer composition dispersion to polymerize the polymerizable monomer composition, wherein the polymerizable monomer composition dispersion contains a water-soluble polymerization inhibitor and a thiuram disulfide.

Abstract: An objective is to provide a toner and a method of manufacturing the toner by which a charging amount of toner is kept maintaining to be an appropriate value for a long duration, print images with no fog, together with high density obtained even after heavy-duty printing are obtained, and no contamination within an apparatus caused by toner scattering is generated. Also disclosed is an electrophotographic toner possessing at least a resin and a colorant, wherein the colorant comprises a compound represented by Formula (1) or a lake product of the compound, and the colorant extracted from the electrophotographic toner surface has a colorant surface-exposure amount index of 0.3-0.8.

Abstract: A developer for development of electrostatic images, comprising colored particles containing a binder resin, a colorant and a parting agent, and an external additive, wherein the developer has properties that a work function is at least 5.70 eV; when excitation energy (eV) in the measurement of the work function is plotted on an axis of abscissa, and a normalized photoelectron yield represented by the 0.5th power of a photoelectron yield per unit photon is plotted on an axis of ordinate, a gradient of the normalized photoelectron yield to the excitation energy is at least 15/eV; and an extraction quantity with methanol is 5.0% by weight or less, and a production process thereof.

Abstract: An object of the present invention is to provide a toner having small-sized and potato-shaped particles created from multiple coherent spherical particles for excellent cleaning ability and high image quality, an image-forming method that realizes high image quality using the toner, and the like. To this end, there is provided a toner, which is produced by granulating toner materials as an organic phase comprising at least a binder resin and a colorant in an aqueous medium and has potato-shaped particles created from multiple coherent primary oil droplets of the organic phase in the aqueous medium.

Abstract: The method of producing polymerized toner, the method including: dispersing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant in an aqueous medium; and polymerizing the polymerizable monomer in the aqueous medium with a polymerization initiator to produce toner particles, and is characterized in that a polymerization initiator which has a specific structure and the hydrogen bond dissociation energies of which satisfy specific relationships is used as the polymerization initiator.

Abstract: A toner production method includes the step of: controlling a shape of toner particles in a shape controlling region to control the shape of toner particles in a water based medium, wherein the shape controlling region has a toner channel for the toner particles and a temperature controller capable of controlling at least two zones.

Abstract: A toner including a binder resin comprising a polyester resin in an amount of from 50 to 100% by weight, wherein the polyester resin includes an unsaturated polyester resin which is preferably a crystalline polyester resin; a colorant; and a fatty acid metal salt which is preferably microencapsulated. A method for preparing a toner including forming particles of a toner composition including at least a binder resin including a polyester resin in an amount of from 50 to 100% by weight and a colorant, in an aqueous medium to prepare a dispersion of a particulate material, wherein the polyester resin includes an unsaturated polyester resin; drying the particulate material; and mixing a fatty acid metal salt with the particulate material to subject double bonds of the unsaturated polyester resin to oxidation polymerization.

Abstract: The invention relates to a process for the preparation of a dry toner powder containing a wax component and formed using a limited coalescence suspension polymerization process. Both conventional and aqueous dispersed waxes may be used to form the toner particles. Likewise, both dry and aqueous dispersed pigments may be used. The resulting toner provides properties desired in the next generation of toners including small uniform particle size as well as desirable anti-blocking and high-temperature anti-offset properties.

Abstract: To provide a toner production process in which at least radically polymerizable monomers are polymerized in at least one of a supercritical fluid and a subcritical fluid to thereby produce toner particles, wherein a polymer of the radically polymerizable monomers is insoluble in at least one of the supercritical fluid and the subcritical fluid.

Abstract: In a process for producing toner particles through granulation by a wet process, a process for producing toner particles is provided that enables reduction of water content in wet toner particle cakes obtained by separating toner particles from a toner particle dispersion in a good efficiency, followed by washing, and enables efficient wash-away of impurities remaining on the toner particle surfaces so as to promise superior image characteristics. The toner particles are produced through a filtering step in which a slurry which contains toner particles is subjected to solid-liquid separation by means of a belt filter having a pressing aeration means which carries out aeration with pressing, to form wet toner particle cakes.

Abstract: The present disclosure relates to a process for latex preparation comprising a first heating of a latomer mixture comprising at least one free radical polymerizable monomer to low conversion and then adding at least one alkylene anhydride; a second heating of the latomer mixture to low conversion; a third heating of the latomer mixture to form polymeric particles; and combining at least one amine with the polymeric particles.

Abstract: The invention relates to a toner powder wherein the individual toner particles of the toner powder contain colorants incorporated into at least one polymer, in particular, pigments. The initial product of the polymer consists of a liquid phase based on a monomer and/or oligomer. Subsequently, the colorants, in particular pigments, are dispersed in said liquid phase. Fine drops having a predetermined drop size are produced from the dispersion. A polymerization reaction of the monomers and/or the oligomers in order to form the polymer is then provoked in the individual drops by exposing the drops to electromagnetic waves or electrons, whereby the polymerized drops form the toner particles of the toner powder. The invention also relates to a system for the production of toner powder in addition to toner powder itself.

Abstract: A polyester for a toner having a softening point of from 70° to 110° C. and a glass transition temperature of from 38° to 60° C., obtained by polycondensing an alcohol component containing a propylene oxide adduct of bisphenol A and an ethylene oxide adduct of bisphenol A in a total amount of 80% by mole or more, with a carboxylic acid component, wherein the propylene oxide adduct has an average number of moles of from 2.0 to 2.4, and the ethylene oxide adduct has an average number of moles of from 2.5 to 4.2. The polyester for a toner of the present invention is suitably used as a resin binder of a toner, or the like, used for, for example, developing a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.

Abstract: Methods of preparing a liquid electrographic toner composition are provided, wherein a polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions is first prepared in a hydrocarbon reaction solvent, wherein the hydrocarbon reaction solvent comprises less than about 10% aromatic components by weight and has a Kauri-Butanol number less than about 30 mL. Toner particles are then formulated in the hydrocarbon reaction solvent and dried. The dried toner particles are then redispersed in a carrier liquid that is different from the reaction solvent, wherein the carrier liquid comprises less than about 10% aromatic components by weight and has a Kauri-Butanol number less than about 30 mL, to form a redispersed liquid electrographic toner composition. Preferred carrier liquids are silicone oils. Products and kits are also provided.

Abstract: The present invention is a method of manufacturing toner particles that includes providing a first emulsion of a first aqueous phase comprising a pore stabilizing hydrocolloid dispersed in an organic solution containing a polymer. The first emulsion is dispersed in a second aqueous phase to form a second emulsion that is sheared in the presence of a stabilizing agent to form droplets of the first emulsion in the second aqueous phase. The organic solution is evaporated from the droplets to form porous toner particles.

Abstract: Disclosed is a toner comprising toner particles comprising a binding resin and a colorant, wherein the toner particles exhibit an average circularity of 0.950 to 0.980, a volume-base median diameter of 4.5 to 8.0 ?m and a volume-based particle size dispersion degree (CVvol) of 15 to 25 and contain a metal element selected from the group consisting of titanium, germanium and aluminum in an amount of 10 to 1500 ppm. A manufacturing method of the toner is also disclosed.

Abstract: The present invention provides dry toner particles comprising at least a radiation curable resin, and a colouring agent, wherein the circularity of the toner particles is between 0.95 and 0.99 and a charge control agent in a concentration between 0.025% and 1.0% by weight is present preferably as an external additive. The toners of this invention are useful for printing any substrate and for use in any form of printing or marking device.

Abstract: A method including contacting a toner including: a binder resin including an unsaturated carboxylic acid derivative monomer; a vinyl polymerizing monomer; and a colorant; to a supercritical fluid or a sub-critical fluid to remove the unsaturated carboxylic acid derivative monomer.

Abstract: To provide a method for producing a toner in which at least monomers are polymerized in at least one of a supercritical fluid and a subcritical fluid to thereby produce toner particles, wherein at least one of the supercritical fluid and the subcritical fluid contains a fluorine-containing surfactant, and a polymer resulted from polymerization of the monomers is insoluble in at least one of the supercritical fluid and the subcritical fluid, and provide a toner produced by the method for producing the toner.

Abstract: A hybrid toner and a method of preparing the toner are provided. The hybrid toner is of a core-shell type having improved storage characteristics and a toner blocking phenomenon. The toner prevents image contamination caused by dispersion of waxes or colorants onto the surface of the outer layer of toner particles are prevented. The hybrid toner includes particles including: a core of about 100 parts by weight of a polyester-based resin, about 1-20 parts by weight of a wax, about 0.1-10 parts by weight of a colorant and about 0.1-10 parts by weight of a charge control agent; and about 5-500 parts by weight of a vinyl-based resin, about 0.1-10 parts by weight of silica, about 0.1-5 parts by weight of a metal oxide and about 0.1-10 parts by weight of polymer beads.

Abstract: To provide a toner production process in which at least radically polymerizable monomers are polymerized in at least one of a supercritical fluid and a subcritical fluid to thereby produce toner particles, wherein a polymer of the radically polymerizable monomers is insoluble in at least one of the supercritical fluid and the subcritical fluid.

Abstract: An electrostatic latent image developing toner is provided for which if surface area values for 1-butanol, ethylbenzene, n-butyl ether, styrene, butyl propionate, cumene, benzaldehyde and propylbenzene obtained from gas chromatographic analysis of volatile gas components generated upon heating the toner are termed, a, b, c, d, e, f, g and h respectively, then Z1 and Z2 satisfy the formulas shown below. Z1=5.2×10?6a+9.6×10?7b+2.7×10?6c?2.5×10?6d+8.7×10?6e+1.5×10?7f+1.1×10?6g+8.3×10?7h?1.81 Z2=6.9×10?6a+4.6×10?6b?3.9×10?7c+2.5×10?6d?2.1×10?5e+2.3×10?7f?6.8×10?7g+1.2×10?6h?1.82 Z1?0, and Z2?0.

Abstract: A method including polymerization performed with the use of a binder resin dispersion containing a styrene monomer, a compound having one or more unsaturated bond and sulfonic acid or sulfonate, and an acrylic ester monomer, wherein the contents of the monomers and the compound are 60 to 90 mol %, 1 mol ppm to 10 mol %, and 10 to 40 mol %, respectively.

Abstract: Provided herein are polyester toner resins that may reduce or eliminate the use of Bis A, a common polyester toner resin material that may pose environmental and/or toxicity risks. In addition, the polyester toner resins according to some embodiments of the present invention may have desirable toner resin properties, such as hot offset resistance.

Abstract: A preparation method of a toner having a micro diameter includes: blending a monomer and a dispersing agent in distilled water to prepare a monomer dispersion; polymerizing the monomer dispersion by adding a first polymerization initiator to about 1% by volume to about 50% by volume of the monomer, to cause a first polymerization; mixing the remaining monomer dispersion with the polymerized solution; and polymerizing the mixed solution by adding a wax emulsion and a second polymerization initiator, to cause a second polymerization. The present invention may be advantageously used for obtaining spherical, uniformly micro sized toner particles through the emulsion polymerization only, without performing the aggregation or melting process.

Abstract: The invention relates to a magenta toner having magenta-colored resin particles comprising at least a binder resin and a magenta colorant. The magenta pigment is a magenta pigment composed of a combination of C.I. Pigment Red 31 and C.I. Pigment Red 150.

Abstract: A method of preparing toner includes preparing a pigment dispersion solution by dispersing a pigment in a mixed surfactant solution composed of an anionic reactive surfactant and a nonionic reactive surfactant, mixing the pigment dispersion solution with a polymer latex prepared by polymerizing a toner composition comprising an amphiphilic macromonomer having at least one reactive functional group at an end thereof and at least one polymerizable monomer, and adding an inorganic salt to a mixed solution of the polymer latex and the pigment dispersion solution to be agglomerated, wherein a shape of toner particles can be controlled to have circularity of 0.5-1.0 by adjusting an amount of the nonionic reactive surfactant to be 20-100 parts by weight based on 100 parts by weight of the anionic reactive surfactant. In addition, a method of forming an image uses the toner, and an image forming apparatus to form an image employs the toner.

Abstract: Toner compositions comprising low-melt toner particles and methods of preparing such toner compositions are provided. The toner particles include a polyester-containing binder, a colorant and an optional wax. The binder includes at least one crystalline polyester resin and at one amorphous acidic polyester resin.

Abstract: A binder resin composition which can sharply, but reversibly, melt and solidify within a narrow temperature range, a toner composition of enhanced low-temperature fixability and durability having the binder resin composition, and a preparation method thereof. The binder resin composition of the toner includes a first polymer compound having a proton donor site in a main chain, and a second polymer compound having a proton acceptor site in a main chain.

Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein substantially all of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, preparing toner particles, drying the toner particles, and milling the dry toner particles in the presence of a wax component to provide a dry toner particle composition having the wax associated with the toner particles.

Abstract: A method of preparing a latex for a toner composition and a method of preparing a toner composition using the same. The method of preparing a latex for a toner composition includes preparing a monomer solution by dissolving a polyester-based monomer in an organic solvent and adding a vinyl-based monomer thereto, preparing an aqueous macromonomer solution by dissolving a macromonomer in water, preparing a solution in which monomers and macromonomer are emulsified by mixing the monomer solution and the aqueous macromonomer solution, and polymerizing the monomers by adding a hydrophilic polymerization initiator to the emulsified solution.

Abstract: A method to prepare a toner composition using a continuous reactor may include inputting a first monomer, a second monomer, and a polymerization initiator into the continuous reactor to polymerize the first and second monomers, and adding a releasing agent, a colorant, and a charge control agent to the polymer of the first and second monomers.

Abstract: A toner including toner particles comprising a binder resin; and at least two kinds of particulate resins which are located on at least a surface of the toner particles, wherein the toner satisfies at least one of the following relationships (TgA?TgB)?20° C., wherein TgA and TgB represent glass transition temperatures (Tg) of a particulate resin (A) having a highest Tg and a particulate resin (B) having a lowest Tg among the at least two kinds of particulate resins, respectively; and 100,000?Mwc?6,000,000 and 8,000?Mwd?800,000, wherein Mwc and Mwd represent weight average molecular weights (Mw) of a particulate resin (C) having a highest Mw and a particulate resin (D) having a lowest Mw among the at least two kinds of particulate resins, respectively, wherein Mwc>Mwd.

Abstract: An image forming apparatus includes a fixing unit for fixing a toner image on a recording medium. In at least one embodiment, the fixing unit includes a fixing member configured to heat and melt a toner. Further, in at least one embodiment, the fixing member has a surface contacting the toner image and includes a wettability not greater than 38 mN/m.

Abstract: The present invention provides a charge control agent, adapted to control charging ability of resins or compositions containing resins, comprising a copolymer that comprises a polymer block A and a polymer block B, the polymer block A is prepared by copolymerizing a maleimide, which being unsubstituted or substituted for a hydrogen atom of an imide group by an electron-donating group, and styrene or a styrene derivative, and the polymer block B is formed of a polymer of styrene or a styrene derivative.

Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles that has been entrained in the toner particle during the formation of the amphipathic copolymer. Methods of making the electrographic toner compositions are also provided. These toner compositions provide images having excellent durability and erasure resistance properties at low fusion temperatures and with little undesired offset.

Abstract: A toner is disclosed. The toner comprises a vinyl resin, a colorant, and a compound represented by a formula of Compound 1, Compound 2 ion or Compound 3.

Abstract: Dry electrographic toner compositions are provided comprising a plurality of dry toner particles, wherein the toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The dry electrographic toner composition comprises a wax associated with the dry toner particles, wherein a substantial portion of the wax is entrained in the toner particle and a substantial portion of the wax is associated with the toner particle at the surface thereof. Methods of making electrographic toner compositions are also provided comprising preparing polymeric binder particles comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions, and milling the particles before or after formulation as toner particles with wax in the liquid carrier prior to drying to form the dry toner composition.

Abstract: A process for producing a toner by subjecting a polymer and a resin component containing a cross-linkable polymer capable of cross-linkingly reacting with the polymer, to cross-linking reaction in the presence of a first wax to form a wax-containing cross-linked polymer composition; mixing the wax-containing cross-linked polymer composition with at least a colorant and a second wax, followed by melt-kneading to form a toner composition; and pulverizing the toner composition to produce toner particles. Also disclosed is a toner produced by this process. The toner thus obtained is a toner whose fixing performance and anti-offset properties are well balanced and also which makes it possible to afford images having less fog and high quality, over a long period of time in environments of from low temperature and low humidity to high temperature and high humidity, and is highly durable without causing any contamination of members with which the toner comes into contact.

Abstract: The present invention provides a toner that exhibits excellent low-temperature fixing properties, offset resistance, and has excellent storage stability in a developing machine. The toner has, in a DSC curve obtained by measuring the toner with differential scanning calorimeter, a glass transition temperature (Tg1) measured in a first scan of 50.0 to 70.0° C. and a temperature difference (Tg1?Tg2) between the glass transition temperature (Tg1) measured in the first scan and a glass transition temperature (Tg2) measured in a second scan ranging from 3.0 to 20.0° C.

Abstract: A toner for developing an electrostatic image having a good combination of hot offset resistance and low temperature fixability. The toner includes (1) a resin having at least one group that can react with a compound having an active hydrogen in an amount of 2 pieces per molecule of the resin, and a colorant. The toner satisfies the following relationship: 3?G=R?Rideal?20, where G represents a ratio of a weight of components other than the colorant and the resin that are insoluble in the organic solvent to total weight of the toner, R represents a weight ratio of components included in the toner that are insoluble in the organic solvent to the total weight of the toner, and Rideal represents an ideal weight ratio of the colorant and the resin, which is calculated from a formula of the toner.

Abstract: A method of manufacturing a toner for developing static charges in an aqueous system is provided which includes preparation step for a resin kneaded product, preparation step for the aqueous dispersion of a less water-soluble alkaline earth metal salt, preparation step for synthetic resin particles, removal step for the less water-soluble alkaline earth metal salt, and separation-cleaning-drying step. At preparation step S3 for synthetic resin, an ionic material for decomposing the less water-soluble alkaline earth metal salt is admixed with a mixture of the resin kneaded product and the aqueous dispersion of the less water-soluble alkaline earth metal salt.

Abstract: The present invention relates to a toner having a double- or triple-layered structure. The present invention is effective in that pigments and charge control agents are located most properly for the realization of high-resolution toners through addition and polymerization of hydrophilic monomers or polymers with the toners; the manufacture of high-resolution toners becomes very easy irrespective to the kind and amount of a wax used for polymerized toners by forming thin layers by using polar grafting agents; and long-term preservation is assured as well as the affect by moisture is minimized.