| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 430137110 | By coating | 32 |
| 20090130589 | METHOD FOR PRODUCING DEVELOPING AGENT - 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. | 05-21-2009 |
| 20100062362 | TONER FOR ELECTROPHOTOGRAPHY - An embodiment may be an electrophotographic toner which comprises at least one toner particle which comprises an inner layer and an outer layer covering the inner layer, wherein a cross-sectional area ratio of the outer layer to the inner layer is 0.05-0.46, and wherein a non-uniform thickness exists in the outer layer, and further the average thickness (t) taken at 5 positions as calculated by, is about 0.2-about 1.0 μm, t=(t | 03-11-2010 |
| 20110014564 | POLYESTER SYNTHESIS - The present disclosure provides processes for the production of block copolymer polyester resins suitable for use in manufacturing toners. In embodiments, the copolymers include both a crystalline block and an amorphous block, which can self-assemble to form nanoparticles suitable for use in forming toners. | 01-20-2011 |
| 20110143278 | TONER PROCESSES - 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 fluorescent agent that renders them visible when exposed to UV light of a specific wavelength. In other embodiments the toners have a color under natural light, and a different color when exposed to UV light. | 06-16-2011 |
| 20110171574 | METHOD FOR MANUFACTURING CAPSULE TONER - A method for manufacturing a capsule toner having improved preservability with no deterioration in low-temperature fixability is provided. The method for manufacturing a capsule toner includes a mixed fine resin particle adhering step of adhering mixed fine resin particles including crystalline polyester fine resin particles and amorphous fine resin particles to surfaces of toner base particles to form mixed fine resin particle-adhered particles, a spraying step of spraying a mixed solution of a liquid for plasticizing the toner base particles and the mixed fine resin particles and a crystal nucleating agent, while fluidizing the mixed fine resin particle-adhered particles, and a film-forming step of making a film of the mixed fine resin particles by impact force so that the film is a resin coating layer on the surfaces of the toner base particles. | 07-14-2011 |
| 20110177451 | METHOD FOR MANUFACTURING CAPSULE TONER - A method for manufacturing a capsule toner, capable of obtaining a capsule toner including a coating layer having uniform thickness at high yield is provided. The method for manufacturing a capsule toner includes a fine resin particle adhering step of adhering fine resin particles to surfaces of toner base particles, a spraying step of spraying a spray liquid for plasticizing the toner base particles and the fine resin particles, while fluidizing the toner base particles and the fine resin particles, and a film-forming step of fluidizing the toner base particles and the fine resin particles until the fine resin particles adhered to the surfaces of the toner base particles are softened to form a film. In the spraying step, ultrasonic vibration is applied to set a number average liquid-droplet diameter of the spray liquid to less than 10 μm. | 07-21-2011 |
| 20120028185 | METHOD FOR FORMING SURFACE DECORATED PARTICLES - A method for forming surface decorated particles including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, the invention provides a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups. | 02-02-2012 |
| 20120064453 | PROCESSES FOR PRODUCING POLYESTER LATEXES WITH IMPROVED HYDROLYTIC STABILITY - A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one crystalline polyester resin with an organic solvent and a stabilizing agent to form a resin mixture, adding a neutralizing agent, and deionized water to the resin mixture, removing the solvent from the formed latex, and continuously recovering latex particles. | 03-15-2012 |
| 20120070775 | TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - 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. | 03-22-2012 |
| 20120107740 | MAGNETIC TONER COMPOSITIONS - The present disclosure relates to a process for preparing a polyester based magnetic toner composition. The toner composition includes one or more polyester amorphous binder resins, optionally a cystalline polyester resin, and spherical ferromagnetic particles. In embodiments, the toner is prepared from ferromagentic particles that have been previously encapsulated in an amorphous resin, a crystalline resin or a wax. In yet other embodiments, the process may be conducted under an inert gas such as argon to avoid oxidation of the ferromagnetic particles during toner preparation. | 05-03-2012 |
| 20120171608 | TONER - A toner in which, in a loss tangent (tan δ) curve obtained by a dynamic viscoelasticity test, the tan δ shows a maximal value δa in the temperature region of 28.0-60.0° C., which maximal value δa is 0.50 or more, and shows a minimal value δb in the temperature region of 45.0-85.0° C., which minimal value δb is 0.60 or less, where the difference between the maximal value δa and the minimal value δb is 0.20 or more; and, where the temperature that affords the maximal value δa is represented by Ta(° C.) and the temperature that affords the minimal value δb is represented by Tb(° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G′) curve obtained by the dynamic viscoelasticity test, a value G′a of a storage elastic modulus at the Ta, of 1.00×10 | 07-05-2012 |
| 20120208122 | Continuous emulsification-aggregation process for the production of particles - 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 at least one feed tank of raw materials, at least one reactor for facilitating cold addition, at least two reactors for facilitating an aggregation process, at least one reactor for facilitating a shell addition process; at least one reactor for facilitating a freeze process, at least one reactor for facilitating a chelating process, at least one reactor for facilitating a ramp-up process and at least one reactor for facilitating a coalescence process, wherein the reactors are sequentially assembled in a series configuration and separated by short conduits to produce toner particles that are narrowly distributed. | 08-16-2012 |
| 20130216946 | Continuous production of fine toner - A continuous process for forming fine toner using a twin screw extruder. | 08-22-2013 |
| 20130260310 | TONER PROCESS USING ACOUSTIC MIXER - A process for making emulsion aggregation (EA) toners is provided. In embodiments, the process comprises aggregating a mixture comprising a latex resin, and at least one colorant in a reactor to form aggregated toner particles, adding a shell resin to form a shell over the aggregated toner particles, coalescing the aggregated toner particles, and recovering the toner particles. | 10-03-2013 |
| 20140045116 | EMULSION AGGREGATION TONER PROCESS COMPRISING DIRECT ADDITION OF SURFACE-TREATED PIGMENT - A method of making a toner that includes adding pigments into an emulsion aggregation toner without first preparing a pigment dispersion. The method eliminates the pigment dispersion step in the manufacture of emulsion aggregation toilers by surface-treating pigments. Dry surface-treated pigments can be directly incorporated into the toner prior to aggregation in the aggregation coalescence process without the need to first prepare aqueous pigment dispersions. | 02-13-2014 |
| 20140295345 | METHOD FOR MANUFACTURING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant. | 10-02-2014 |
| 20140370438 | IMPROVED PROCESS FOR PREPARING POLYESTER EMULSIONS - A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex. | 12-18-2014 |
| 20150056551 | TONER PROCESS COMPRISING REDUCED COALESCENCE TEMPERATURE - A method of forming toner particles includes aggregating a mixture of a latex, a wax, and an optional pigment to form pre-toner particles, and coalescing the pre-toner particles at a substantially constant target temperature selected within a range from about the glass transition temperature of the pre-toner particles to about 75° C., thereby creating toner particles having a substantially constant particle size distribution during the coalescing step. | 02-26-2015 |
| 20150079517 | METHOD FOR PRODUCING TONER - A method for producing a toner includes: dissolving a thermoplastic resin and a thermosetting resin in an organic solvent; mixing the organic solvent containing the thermoplastic resin and the thermosetting resin with an aqueous medium, and micronizing the thermoplastic resin in a mixture obtained; and forming a film of the dissolved thermosetting resin on surfaces of fine particles formed through the micronization. | 03-19-2015 |
| 20160070185 | METHOD OF MANUFACTURING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - A method of manufacturing an electrostatic latent image developing toner made of a binding resin made of an amorphous resin and a crystalline resin, and toner particles containing a releasing agent and a coloring agent, the method includes: adding a monomer for forming the amorphous resin, in an aqueous medium, under presence of the fine particles containing the crystalline resin, and performing polymerization to obtain coated resin fine particles that are fine particles containing the crystalline resin, the fine particles being coated with the amorphous resin; and flocculating and fusing at least fine particles containing the amorphous resin, the coated resin fine particles, and fine particles containing the coloring agent, in an aqueous medium, under presence of a flocculating agent, to obtain the toner particles, wherein a surfactant having concentration of one to five times critical micellar concentration is added to the aqueous medium in the polymerization. | 03-10-2016 |
| 20160091808 | SUPER LOW MELT TONER HAVING CRYSTALLINE AROMATIC MONOESTERS - A toner includes a polymeric resin, a colorant, and a small molecule crystalline aromatic monoester having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline aromatic monoester may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline aromatic monoester as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline aromatic monoester in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline aromatic monoester in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline aromatic monoesters may include 2-Naphthyl benzoate. | 03-31-2016 |
| 20160187798 | RESIN FINE PARTICLE, METHOD OF PRODUCING RESIN PARTICLE INCLUDING USING THE RESIN FINE PARTICLE, AND METHOD OF PRODUCING TONER - Provided is a method of producing a toner including the steps of: mixing a resin solution comprising a resin R, a colorant, and an organic solvent, a resin fine particle comprising a resin S containing an element α, and carbon dioxide to form a droplet having a surface covered with the resin fine particle; introducing carbon dioxide in a liquid state and pressurizing to extract the organic solvent in the droplet; and removing the extracted organic solvent together with the carbon dioxide to provide a toner particle. In the method of producing a toner, when the resin fine particle is treated with the carbon dioxide in a liquid state, a change in amount of the element α on the surface of the resin fine particle after the treatment as compared to the amount before the treatment falls within a specific range. | 06-30-2016 |
| 430137120 | In situ polymerization to form shell, followed by polymerization to form core | 1 |
| 20120107741 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND METHOD OF MANUFACTURING THE SAME - Provided is a method of manufacturing toner by which the toner capable of forming high quality images and reproducing high density gradation, which exhibits an excellent high-temperature offsetting property together with excellent low-temperature fixability, and provides appropriate gloss with respect to images to be formed, can be stably prepared; and also provided is the toner. After conducting a step in which particles made of at least a crystalline polyester resin are coagulated to form core coagulated particles, and an unsaturated amorphous polyester resin particle is attached onto the surface of each of the core coagulated particles to form core-shell type coagulated particles, radical polymerization reaction is conducted by acting a radical polymerization initiator on the foregoing core-shell type coagulated particles to conduct a step in which a layer made of a crosslinking amorphous polyester resin is formed on the surface of each of the core coagulated particles. | 05-03-2012 |
| 430137130 | Carrier core coating | 9 |
| 20090053644 | CORE-SHELL POLYMER NANOPARTICLES AND METHOD FOR MAKING EMULSION AGGREGATION PARTICLES USING SAME - The method of making nano-sized particles for use in making emulsion aggregation toner particles, the nano-sized particles having a core portion and a shell portion, wherein the core portion of the nano-sized particles includes crystalline resin and the shell portion includes amorphous resin and is substantially to completely free of the crystalline resin. | 02-26-2009 |
| 20100233615 | METHOD OF PRODUCING A CARRIER FOR ELECTROPHOTOGRAPHY AND METHOD OF PRODUCING A DEVELOPER FOR ELECTROPHOTOGRAPHY - A method of producing a carrier for electrophotography includes: covering a surface of a core particle with a coating layer including resin particles and a crosslinking resin in an uncrosslinked state present in spaces between the resin particles; and applying a mechanical impact from the outer surface of the coating layer before crosslinking of the crosslinking resin. | 09-16-2010 |
| 20110111338 | TONER MANUFACTURING METHOD - A toner manufacturing method is provided. The toner manufacturing method includes a step of adhering fine resin particles whose volume average particle size is 5% or more and 17% or less of a volume average particle size of toner base particles, to surfaces of the toner base particles; and a step of plasticizing the toner base particles and the fine resin particles by adding mechanical impact thereto while spraying lower alcohol, and fusing the fine resin particles to the surfaces of the toner base particles to form a plurality of projections of the fine resin particles, on the surfaces of the toner base particles. Surface coverage of the surfaces of the toner base particles with the projections is 10% or more and 50% or less. | 05-12-2011 |
| 20120028186 | PRODUCTION METHOD OF TWO-COMPONENT DEVELOPER - Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pit apertures on a surface of the particle, and the method comprises steps of blocking the pit apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore openings have been blocked, and mixing the resin coated carrier and the toner. | 02-02-2012 |
| 20130202998 | METHOD FOR PRODUCING AQUEOUS DISPERSION OF RESIN FINE PARTICLES AND METHOD FOR PRODUCING TONER - The present invention provides a method for producing an aqueous dispersion of resin fine particles wherein the particle size of the obtained resin particles is small and the aqueous dispersion is excellent in productivity, the production method including: mixing a resin having an acid group, a betaine surfactant and a solvent capable of dissolving the resin having an acid group to obtain a mixture; and emulsifying the mixture by placing the mixture in an aqueous medium and by applying shear force to the mixture under a condition of pH=7.0 or more to obtain an emulsion. | 08-08-2013 |
| 20140272703 | TRIBOELECTRIC CHARGE CONTROL OF TONER THROUGH MONOMER RATIO OF SHELL LATEX - Core/shell toner particles are made to have a desired triboelectric charge through control of the glass transition temperature (Tg) of the shell polymer and/or the ratio of styrene and at least one monomer for forming the polymer of the shell. The polymer is introduced onto core particles to form a shell thereon via an aggregation process. | 09-18-2014 |
| 20150030979 | METHOD FOR PRODUCING TONER - A method for producing a toner, includes the steps of: preparing a core having a zeta potential at pH 4 of −5 mV or less; and forming a cationic shell layer on a surface of the core in a solution in which a material of the shell layer having miscibility with a solvent of 250% by mass or more and 1000% by mass or less is dissolved in the solvent. | 01-29-2015 |
| 20150378275 | METHOD FOR PRODUCING TONER PARTICLES - A method is provided for producing toner particles containing an organosilicon polymer, produced by mixing an organosilicon compound and an aqueous medium containing base particles, and polymerizing the organosilicon compound. The organosilicon compound has a particular structure represented by formula (1) or (2). The organosilicon polymer is produced by polymerization at 80.0° C. or more and 105.0° C. or less. | 12-31-2015 |
| 20190146374 | ELECTROGRAPHIC PRINTING USING ENCAPSULATED INK DROPLETS | 05-16-2019 |
