Entries |
Document | Title | Date |
20080206665 | Toner, method for producing toner, two component developer, and image forming apparatus - First toner of the present invention includes colored particles and an external additive. The colored particles are produced by heating and aggregating a mixture that includes a resin particle dispersion in which first resin particles are dispersed and a pigment particle dispersion in which pigment particles are dispersed, so that at least part of the first resin particles is melted. The colored particles have a finely roughened surface. Second toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughed surface formed by fusing at least part of wax and at least part of second resin particles on the surface of the aggregated particles. Third toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughened surface formed by fusing at least part of third resin particles and at least part of fourth resin particles on the surface of the aggregated particles. When the aggregated particles are formed in an aqueous medium, the pH is controlled in the specified range. The toner can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance. Therefore, it is possible to eliminate the spent of toner components on a carrier and to make the life longer. Moreover, thinning or scattering during transfer can be suppressed, thus ensuring high transfer efficiency. | 08-28-2008 |
20080213687 | TONER PROCESS - The present disclosure relates to a toner process comprising providing a resin miniemulsion comprising polymeric particles comprising at least one free radical polymerizable monomer compound and at least one alkylene anhydride; blending the miniemulsion with at least one colorant, at least one amine, and optionally at least one wax; heating the resulting mixture below or about equal to the glass transition temperature (Tg) of the resin emulsion; and heating the resulting mixture above or about equal to the glass transition temperature (Tg) of the resin emulsion. | 09-04-2008 |
20080227020 | Preparation of Toner from Latex Wax Composites - The present disclosure relates to chemically processed toner, wherein fuser release agent (wax) may be dispersed in a fluid containing a dispersant. Introduced to the wax dispersion are one or more polymerizable monomers which may be polymerized to form a latex of polymer particles. The polymer particles may then serve as a binder for the formation of toner for use in an electrophotographic printer. The polymerizable monomers may utilize acrylic esters that include relatively long chain hydrocarbon type substitution. | 09-18-2008 |
20080261144 | METHOD FOR PRODUCING DEVELOPING AGENT - A method for producing a developing agent, includes preparing a dispersion of particles containing a binder resin and a coloring agent and forming toner particles by aggregating and fusing the particles, in which the number of coarse particles having a particle size of 0.6 μm or larger after the solid concentration of the dispersion of particles is adjusted to 1 ppm is less than 3,000 per μL. | 10-23-2008 |
20080268368 | Toner, method for producing toner, two-component developer, and image forming apparatus - Toner of the present invention includes aggregated particles formed by aggregating at least resin particles, pigment particles, and wax particles in an aqueous medium in the presence of a water-soluble inorganic salt. The wax includes at least one selected from the following: ester wax that has an iodine value of not more than 25, a saponification value of 30 to 300, and an endothermic peak temperature (melting point) of 50° C. to 100° C. based on a DSC method; and wax that is obtained by a reaction of alkyl alcohol having a carbon number of 4 to 30, unsaturated polycarboxylic acid or its anhydride, and synthetic hydrocarbon wax, and has an acid value of 1 to 80 mgKOH/g and an endothermic peak temperature (melted point) of 50° C. to 120° C. based on the DSC method. The toner and a two-component developer can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance, can eliminate spent of the toner components on a carrier to make the life longer, and can ensure high transfer efficiency by suppressing transfer voids or scattering during transfer. | 10-30-2008 |
20080318151 | Preparation method of latex for toner and preparation method of toner from the same - A method for preparing latex for a toner includes heating a mixture of distilled deionized water and poly (ethylene glycol)-ethyl ether methacrylate (PEG-EEM) with stirring, adding a monomer mixture, 1-dodecanethiol and an ester wax to the mixture, dispersing the mixture with ultrasonic vibration, adding potassium persulfate (KPS) to the dispersion and allowing to react for 4 to 6 hours, and allowing the reaction mixture to cool with stirring. The dry toner prepared by the method enables easy control over the molecular weight of latex, has superior durability and excellent low-temperature fixation, contains a small amount of wastewater and is composed of small-diameter particles, thus being suitable for use in high-definition printers. | 12-25-2008 |
20090017396 | SILICONE WAX-CONTAINING TONER PARTICLES WITH CONTROLLED MORPHOLOGY - The present invention is a method for the preparation of electrostatographic toner including the following steps. A first dispersion is prepared with a solvent, a silicone wax, and a hyperdispersant. The first dispersion is added to an organic solvent containing a polymer material to form an organic phase. The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a second dispersion. The second dispersion is homogenized. The organic solvent is evaporated from the second dispersion and the resultant product is recovered, washed and dried. In an alternate method the hyperdispersant is added directly to the organic phase before mixing with the aqueous phase. | 01-15-2009 |
20090029282 | POLYESTER RESIN TONER PRODUCED BY EMULSION AGGREGATION - The present disclosure relates to chemically processed toner. The toner may be prepared by an emulsion aggregation method by forming a polyester dispersion wherein the polyester has an acid value of about 5 to about 50 and a particle size of about 50 to about 500 nanometers. The polyester dispersion may then be combined with a pigment and/or release agent dispersion wherein the pigment and/or release agent dispersion may contain a dispersant. This may then be followed by heating and recovering agglomerated toner particles wherein the toner particles may have a mean particle size of about 3 to about 15 microns and an average degree of circularity of between about 0.90 to about 1.0. | 01-29-2009 |
20090047595 | Nano-Sized Composites Containing Polymer Modified Clays and Method for Making Toner Particles Using Same - A method for making toners to include clay composites. The clay composites are incorporated into emulsion of toner and used in making toner via emulsion aggregation. Such toners may have a core and/or a shell and the clay composites may be included with the core, the shell or both. | 02-19-2009 |
20090061349 | LOW MELT TONERS AND PROCESSES THEREOF - A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the T | 03-05-2009 |
20090081575 | SINGLE COMPONENT DEVELOPER - A method for developing toner for use in a single component development system, wherein the process includes a) contacting a styrene acrylate polymer binder resin having a weight average molecular weight (Mw) of from about 50 to about 100 Kpse, and a number average molecular weight (Mn) of from about 10 to about 30 Kpse, a wax selected from the group consisting of polypropylene and polyethylene, and at least one colorant to produce a toner blend, b) aggregating the blend by heating at a temperature at or above the glass transition temperature of the styrene acrylate resin to form an aggregated toner core; c) adding a second binder resin to the aggregated toner core to form a shell over said toner core thereby forming a core-shell toner; d) growing said core-shell toner to a desired size; e) coalescing the core-shell toner by heating at a temperature above the glass transition temperature of the second latex; and f) recovering toner particles, wherein the toner particles have an onset glass transition temperature of from about 50° C. to about 60° C., and a circularity of from about 0.950 to about 0.990. | 03-26-2009 |
20090111045 | METHOD FOR PRODUCING POLYMERIZED TONER - The present invention provides a method of producing a polymerized toner which removes a by-product microparticle generated as a by-product upon polymerization in a by-product microparticle removing step, efficiently obtains a wet colored resin particle which has low moisture content (wet cake) by decreasing clogs caused at filter element in a dewatering step, enhances a drying efficiency (shorten the drying time) in a drying step, has an excellent productivity and a printing ability. | 04-30-2009 |
20090123866 | Method For Producing Toner - A method for producing toner is described. In the method for producing a toner, a resin liquid is prepared by mixing at least a binder resin made of polyester resin and a colorant with an organic solvent, the resin liquid is dispersed in an aqueous medium to form an emulsion, and the organic solvent is removed from the emulsion to produce a toner. The organic solvent before preparation of the resin liquid contains 5 to 20 parts by weight of water per 100 parts by weight of the organic solvent. | 05-14-2009 |
20090142691 | IONIC POLYMER FLOCCULANTS FOR THE PREPARATION OF CHEMICALLY PROCESSED TONER - The present disclosure relates to a process for producing a toner particulate composition from aqueous dispersions containing aggregates of a polymer binder and other toner ingredients. An ionic surfactant may be used to form the dispersion along with an ionic polymer flocculent wherein the ionic polymer flocculent undergoes a molecular conformational change, which may be triggered by pH adjustment, leading to flocculation and particle growth. | 06-04-2009 |
20090148786 | Regulated Cooling for Chemically Prepared Toner Manufacture - The present disclosure relates generally to chemically prepared toner (CPT) that employs a regulated cooling process subsequent to coalescence and fusing. The cooling process may influence the distribution of domain morphology of the components within a toner particle such as controlling release agent domain formation and accompanying migration to the toner particle surface. | 06-11-2009 |
20090155711 | TONER COMPOSITION AND METHOD FOR MANUFACTURING THE TONER COMPOSITION - A toner composition including toner particles, wherein the toner particles are prepared by a method in which toner constituents including at least a binder resin and a colorant are kneaded upon application of heat to prepare a toner constituent mixture; the toner constituent mixture is dissolved or swelled in an organic solvent capable of dissolving or swelling at least the binder resin to prepare an oil phase liquid; the oil phase liquid is emulsified in an aqueous liquid to prepare an emulsion; the emulsion is coagulated; and then the coagulated emulsion is dried to prepare the toner particles. | 06-18-2009 |
20090162779 | METHOD OF MANUFACTURING INK - The present invention is a method of manufacturing ink. The method includes providing a first organic phase of a solvent containing a dissolved polymer, an oil and a pigment. The organic solvent is dispersed in an aqueous phase containing a stabilizer to form an emulsion containing droplets of the organic phase. The solvent is removed from the droplets to form discrete particles having multiple domains of oil and pigment. | 06-25-2009 |
20090208864 | SOLVENT-FREE PHASE INVERSION PROCESS FOR PRODUCING RESIN EMULSIONS - A process for making a resin emulsion suitable for use in forming toner particles includes melt mixing a resin possessing acid groups at a temperature higher than the glass transition temperature of the resin, optionally adding a surfactant before, prior to, during, or after melt mixing the resin, and adding a basic neutralization agent and water to the resin to form an emulsion. In embodiments, the resin emulsion thus produced may be utilized to form a toner. | 08-20-2009 |
20090246679 | TONER PROCESS - The present disclosure provides processes for preparing toner particles, in which fewer coarse particles are generated. The process includes introducing a buffer solution during coalescence of the toner slurry. The amount of coarse particles in the resulting toner particles may, in embodiments, be reduced to less than about 5 percent by weight of the total toner particles generated. | 10-01-2009 |
20090246680 | LATEX PROCESSES - Processes for continuously forming latex emulsions useful in preparing toners are provided which do not require the use of solvents. | 10-01-2009 |
20090246681 | Method for Producing Positive Charging Toner - The present teaching provides a method for producing a positive charging toner that can exhibit stable charge characteristics. According to the present teaching, a positive charging toner is produced by preparing a base particle suspension having a conductivity not higher than 70 μS/cm and comprising base particles that are obtained by mixing and emulsifying an aqueous medium and a resin solution containing the polyester resin; producing toner base particles by mixing the base particle suspension with a charge control resin microparticle suspension containing charge control resin microparticles; causing the charge control resin microparticles to adhere to the surfaces of the base particles; and washing the toner base particles. | 10-01-2009 |
20090317738 | METHOD AND APPARATUS FOR PRODUCING TONER - A method for producing a toner, including ejecting a toner composition liquid containing at least a resin and a colorant periodically from a plurality of nozzles into a chamber using a vibration unit, so as to form droplets in a gas phase; and solidifying the droplets, wherein the droplets are transported by transport air flow selected from at least one of vertical downward air flow and rotational air flow, and the method can prevent toner particles from aggregation. | 12-24-2009 |
20090325101 | Method for Producing Toner - The present teachings provide a method for producing a yet superior toner by emulsification aggregation. The method for producing toner by emulsification aggregation comprises the following steps (a) and (b): (a) preparing primary base particles through aggregation and fusion of base microparticles obtained by emulsifying and dispersing a binder resin of the toner; and (b) producing secondary base particles by aggregating the primary base particles with the base microparticles. | 12-31-2009 |
20100021841 | LOW MELT TONERS AND PROCESSES THEREOF - A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the T | 01-28-2010 |
20100028798 | TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND IMAGE FORMING METHOD - A toner for electrostatic latent image development, in which the image quality is fine, toner blister would not occur, and furthermore, the image quality which can fulfill customer's satisfaction can be obtained regardless of the temperature humidity environment in the image forming. The toner for electrostatic latent image development is made by agglomeration of resin particles and colorant particles in an aqueous medium. The acid value of the toner is less than 20 mgKOH/g, and the hydroxyl value of the toner is 7 to 57 mgKOH/g. | 02-04-2010 |
20100092886 | TONER COMPOSITIONS - The present disclosure provides processes for producing toners by emulsion aggregation where the resulting toner particles have high pigment loadings and desired circularity. The methods include adding a metal, in embodiments a metal salt, at the beginning of coalescence, which surprisingly speeds the coalescence process and produces toner particles having a desired size and circularity for use in electrophotographic imaging systems. | 04-15-2010 |
20100104970 | Method and apparatus for producing toner - A method and an apparatus for producing toner are provided. A fluid comprising a resin and a colorant is supplied to a retention member that includes a film on which multiple discharge openings are formed. The fluid which is supplied to the retention member is resonated so that liquid droplets thereof are discharged from the multiple openings. The liquid droplets which are discharged from the multiple openings are solidified to form mother particles of a toner. | 04-29-2010 |
20100104971 | TONER, METHOD FOR PRODUCING TONER, TWO COMPONENT DEVELOPER, AND IMAGE FORMING APPARATUS - First toner of the present invention includes colored particles and an external additive. The colored particles are produced by heating and aggregating a mixture that includes a resin particle dispersion in which first resin particles are dispersed and a pigment particle dispersion in which pigment particles are dispersed, so that at least part of the first resin particles is melted. The colored particles have a finely roughened surface. Second toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughed surface formed by fusing at least part of wax and at least part of second resin particles on the surface of the aggregated particles. Third toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughened surface formed by fusing at least part of third resin particles and at least part of fourth resin particles on the surface of the aggregated particles. When the aggregated particles are formed in an aqueous medium, the pH is controlled in the specified range. The toner can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance. Therefore, it is possible to eliminate the spent of toner components on a carrier and to make the life longer. Moreover, thinning or scattering during transfer can be suppressed, thus ensuring high transfer efficiency. | 04-29-2010 |
20100143839 | TONER PROCESS - The present disclosure provides processes for increasing the shelf life and stability of resin emulsions suitable for use in forming toner particles. In embodiments, the pH of the resin emulsion is monitored, and a base is added as needed to maintain the pH of the emulsion at from about 6.5 to about 8. Maintaining the pH at from about 6.5 to about 8 prevents the degradation of the resin in the emulsion, including its molecular weight. | 06-10-2010 |
20100159386 | METHOD FOR PRODUCING DEVELOPING AGENT - A method for producing a developing agent, wherein in the formation of aggregated particles, particles in a dispersion liquid have a volume average particle diameter of 2 μm or less when the pH of the dispersion liquid is 7, and also the pH of the dispersion liquid is from 3.0 to 6.9 when the zeta potential of the particles is −30 mV. | 06-24-2010 |
20100159387 | TONER PROCESS - The present disclosure provides processes for preparing toner particles, in which fewer coarse particles are generated. The process includes introducing a buffer solution during coalescence of the toner slurry. The amount of coarse particles in the resulting toner particles may, in embodiments, be reduced to less than about 5 percent by weight of the total toner particles generated. | 06-24-2010 |
20100173244 | Toner Comprising Polyester, Process for Making the Toner and Uses Thereof - A process for preparing a toner comprising a binder resin and a colorant, wherein the binder resin comprises a polyester resin having an acid value greater than 5 mg KOH/g, the process comprising: providing an aqueous dispersion of polyester resin particles stabilised by an ionic surfactant and then associating the polyester resin particles. | 07-08-2010 |
20100190102 | Toner Comprising Polyester, Process for Making the Toner and Uses Thereof - A process for preparing a toner comprising a binder resin and a colorant, wherein the binder resin comprises a polyester resin having an acid value (AV) greater than 5 mg KOH/g, the process comprising: providing an aqueous dispersion of self-dispersed polyester resin particles and associating the polyester resin particles by means of a change in the pH of the dispersion. | 07-29-2010 |
20100216069 | METHOD OF PREPARING TONER - Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed. | 08-26-2010 |
20100227268 | METHOD OF MANUFACTURING ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER - Provided is a method of manufacturing an electrostatic charge image developing toner exhibiting reduced variation in charging amount among manufacturing lots, which is capable of generating no fog, and acquiring high density print images. Disclosed is a method of manufacturing an electrostatic charge image developing toner, possessing the step of washing toner mother particles having been formed in an aqueous medium with washing water, wherein the washing water has a total dissolution component amount of at least 0.05 mg/liter and less than 0.5 mg/liter. | 09-09-2010 |
20100266948 | SOLVENT-FREE EMULSION PROCESS - A process for making a resin emulsion suitable for use in forming toner particles is provided. In embodiments, a suitable process includes melt mixing a resin in the absence of an organic solvent, optionally adding a surfactant to the resin, adding to the resin a basic agent and water, and subjecting the resin, basic agent and water to acoustic mixing at a suitable frequency to form an emulsion of resin particles. In embodiments, the resin emulsion thus produced may be utilized to form a toner. | 10-21-2010 |
20100266949 | SOLVENT-FREE EMULSION PROCESS USING ACOUSTIC MIXING - A process for making toner particles is provided. In embodiments, a suitable process includes melt mixing a resin in the absence of an organic solvent, optionally adding a surfactant to the resin, adding to the resin at least one colorant and other optional toner additives, adding to the resin a basic agent and water to form a mixture, and subjecting the mixture to acoustic mixing at a suitable frequency to form to form an emulsion. A phase inversion may then be performed to create a phase inversed emulsion including a disperse phase comprising molten resin and the optional ingredients of the toner composition, at which time toner-sized droplets may be solidified from the disperse phase into toner particles, which can be recovered for use. | 10-21-2010 |
20100310983 | TONER PROCESS INCLUDING MODIFYING RHEOLOGY - A process for making particles is provided. In embodiments, a suitable process includes adding a rheology modifier to an emulsion utilized to form toner particles. The rheology modifier permits the use of a higher solid content in the emulsion, with a resulting higher yield of toner particles, without requiring the use of powerful mixing equipment. | 12-09-2010 |
20100310984 | TONER PROCESSES UTILIZING A DEFOAMER AS A COALESCENCE AID FOR CONTINUOUS AND BATCH EMULSION AGGREGATION - A process for making toner particles is provided. In embodiments, a suitable process includes adding a defoamer to an emulsion utilized to form toner particles. Utilization of the defoamer allows for a reduction in the overall aggregation/coalescence cycle time and slurry viscosity, while producing a toner with improved GSDs, low coarse and target circularities. | 12-09-2010 |
20110014565 | METHOD OF MANUFACTURING TONER - A method of manufacturing a toner including supplying a fluid containing a resin and a coloring agent to a retaining member including a film having multiple discharge orifices, discharging droplets of the fluid from the multiple discharge orifices at a speed of from 2 to 4 m/s by applying a pulse voltage having a trapezoid waveform to a piezoelectric body having a surface provided substantially parallel to the film to move the surface in a direction away from the film relative to a reference position of the surface followed by holding the surface there for a predetermined time, and bringing the surface back to the reference position; and solidifying droplets of the fluid discharged from the multiple discharge orifices to form mother particles. | 01-20-2011 |
20110045403 | TONER COMPOSITION AND METHOD FOR MANUFACTURING THE TONER COMPOSITION - A toner composition including toner particles, wherein the toner particles are prepared by a method in which toner constituents including at least a binder resin and a colorant are kneaded upon application of heat to prepare a toner constituent mixture; the toner constituent mixture is dissolved or swelled in an organic solvent capable of dissolving or swelling at least the binder resin to prepare an oil phase liquid; the oil phase liquid is emulsified in an aqueous liquid to prepare an emulsion; the emulsion is coagulated; and then the coagulated emulsion is dried to prepare the toner particles. | 02-24-2011 |
20110053079 | POLYESTER PROCESS - The present disclosure provides processes for the preparation of unsaturated polyesters. In embodiments, a process of the present disclosure includes reacting an organic diol with a cyclic alkylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and subsequently polycondensing the resulting mixture with a dicarboxylic acid in combination with an anhydride. | 03-03-2011 |
20110097664 | METHOD FOR CONTROLLING A TONER PREPARATION PROCESS - A method of making toner particles, including mixing at least one emulsion of at least one resin, a colorant, an optional wax, and optional additives to form a slurry; heating the slurry to form aggregated particles in the slurry; freezing aggregation of the particles with a buffer solution; and heating the aggregated particles in the slurry to coalesce the particles into toner particles. | 04-28-2011 |
20110097665 | TONER PARTICLES AND COLD HOMOGENIZATION METHOD - A method of making toner particles, including cold homogenizing at a temperature below room temperature a resin emulsion, a colorant, an optional wax, and optional additives with a coagulant to form a toner slurry; heating the toner slurry to form aggregated toner particles; freezing aggregation of the particles in the slurry once at a desired aggregated particle size; and further heating the aggregated particles in the slurry to coalesce the aggregated particles into toner particles. | 04-28-2011 |
20110104609 | SYNTHESIS AND EMULSIFICATION OF RESINS - The present disclosure provides processes for producing resins suitable for use in forming toner compositions. In embodiments, the processes described herein comprise formation of latexes, including latexes for use in toners, produced without use of solvents. | 05-05-2011 |
20110136058 | EMULSION AGGREGATION METHODS - A method of making toner particles, including: mixing, at less than about 17° C. and without homogenizing, a resin emulsion with a coagulant, a colorant, an optional wax, and optional additives, to form pre-aggregated particles in a slurry; heating the slurry to form aggregated toner particles; freezing aggregation of the particles in the slurry once at a desired aggregated particle size; and further heating the aggregated particles in the slurry to coalesce the aggregated particles into toner particles. | 06-09-2011 |
20110136059 | METHOD FOR PREPARING MULTIPLE EMULSION AND POROUS POLYMER PARTICLES THEREFROM - A method of manufacturing a double emulsion with narrow dispersed phase particle size distribution comprising: providing an organic phase comprising solid hydrocolloid particles dispersed in an organic solvent; and dispersing the organic phase in an aqueous phase in the presence of a controlled amount of stabilizing agent to form an emulsion of droplets of the organic phase dispersed in the external aqueous phase, wherein the hydrocolloid particles in the organic phase droplets are swelled with water from the external aqueous phase to form internal droplets of an aqueous phase in the organic phase droplets, thereby forming a double emulsion comprising droplets of the organic phase of controlled narrow particle size distribution in the external aqueous phase, where the organic phase droplets contain internal droplets of an aqueous phase. A method for producing porous polymeric particles by such a double emulsion method, wherein the organic phase further comprises a polymer resin, and wherein the organic solvent is removed from the dispersed organic phase droplets to form porous toner particles. | 06-09-2011 |
20110165510 | TONER, PROCESS FOR PRODUCING TONER, AND TWO-COMPONENT DEVELOPING AGENT - A toner or two-component developer is obtained by mixing, aggregating, and heating resin particles, colorant particles, and wax particles in an aqueous medium. A gel permeation chromatography (GPC) measurement of the resin particles shows that a weight-average molecular weight is 10000 to 60000, and the ratio of the weight-average molecular weight to a number-average molecular weight is 1.5 to 6. The wax particles include at least a first wax and a second wax. An endothermic peak temperature (melting point Tmw1 (° C.)) of the first wax based on a DSC method is 50° C. to 90° C. An endothermic peak temperature (melting point Tmw2 (° C.)) of the second wax based on the DSC method is at least 5° C. to 50° C. higher than Tmw1. Thus, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process, can achieve a longer life, and can suppress transfer voids or scattering during transfer. | 07-07-2011 |
20110177452 | PRODUCTION METHOD OF TONER FOR DEVELOPING ELECTROSTATIC IMAGE - A production method of a toner for developing an electrostatic image composed of toner parent particles and external additives adhered to a surface the toner parent particles is disclosed. The method includes steps of preparing toner parent particles dispersion liquid in which toner parent particles are dispersed in a medium, first mixing the dispersion liquid with a quaternary ammonium salt compound and a water soluble organic solvent to prepare liquid mixture, and second mixing the liquid mixture with external additive dispersion liquid in which negative charged external additives are dispersed. | 07-21-2011 |
20110207046 | TONER COMPOSITIONS AND PROCESSES - A process for preparing a toner includes forming an emulsion with a buffer solution and an amorphous biodegradable polyester resin represented by Formula (1): | 08-25-2011 |
20110269067 | METHOD OF PREPARING TONER HAVING NARROW PARTICLE SIZE DISTRIBUTION - According to a method of preparing a toner by emulsion aggregation, viscosity of dispersions is controlled during an initial reaction by using an abietic acid so that a particle diameter distribution of the toner is narrowed. | 11-03-2011 |
20110269068 | METHOD OF PREPARING TONER HAVING NARROW PARTICLE SIZE DISTRIBUTION - According to preparing toner by emulsion aggregation, viscosity of dispersions is controlled during an initial reaction by using a cellulose derivative and/or a cyclodextrin derivative so that a particle diameter distribution of the toner is narrowed and environmental problems caused by the use of the toner may be reduced. | 11-03-2011 |
20110281216 | PROCESSES FOR PRODUCING POLYESTER LATEXES VIA SINGLE-SOLVENT-BASED EMULSIFICATION - 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 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. | 11-17-2011 |
20110287359 | EMULSION AGGREGATION PROCESS - The present disclosure provides emulsion aggregation (EA) toner particles having less pigment on the particle surface and a more uniform pigment distribution. The process of preparing the toner includes specific mixing speeds and use of specific temperatures during the emulsion aggregation process and the addition of a shell to the toner particles. | 11-24-2011 |
20120003581 | METHOD OF MANUFACTURING WAX-CONTAINING POLYMER PARTICLES - The present invention is directed towards methods of manufacturing wax-containing polymer particles by limited coalescence processes employing aqueous wax dispersions. In one embodiment, an aqueous wax dispersion or emulsion is dispersed in an oil phase comprising a water-immiscible solvent and a polymer to form a transient water-in-oil (W/O) emulsion, and a further aqueous phase containing a particulate stabilizer is then added to the W/O emulsion to induce phase inversion, and the mixture homogenized to form an oil-in-water (O/W) emulsion. The solvent is then removed from the emulsion to form particles containing wax domains inside. In another embodiment, the aqueous wax dispersion is first mixed with the aqueous phase containing the particulate stabilizer, and homogenization is made with the oil phase to form an O/W emulsion, from which wax-containing particles are obtained after solvent removal. In still further embodiments, the aqueous wax dispersion is used in the second water phase of a double emulsion (W1/O/W2) process to form porous polymer particles containing the wax. | 01-05-2012 |
20120015292 | TONER COMPOSITIONS - The present disclosure provides processes for producing toner particles, and toner particles produced by such processes. The processes of the present disclosure combine melt-mixing and grinding of toner components to produce toner particles, followed by a coalescing treatment which provides toner particles having desirable spherical properties. | 01-19-2012 |
20120021351 | CONTINUOUS PROCESS FOR PRODUCING TONER USING AN OSCILLATORY FLOW CONTINUOUS REACTOR - The present disclosure provides for oscillatory flow continuous reactors suitable for use in forming emulsion aggregation toners. The reactor may include at least one receptacle being a flexible, tubular member. The reactor may also include a plurality of baffles disposed, at spaced apart intervals, along an interior space of the tubular member, each of the plurality of baffles including one or more orifices. Additionally, one or more fluids may flow through the tubular member. The oscillatory flow continuous reactor may be used in an emulsion aggregation process to produce toner particles. | 01-26-2012 |
20120021352 | TONER MANUFACTURING METHOD - Disclosed is a manufacturing method of toner which includes at least polyester resin and colorant, comprising the steps of: (A) dissolving, into an organic solvent, the polyester resin and ultrahigh molecular weight styrene resin in which a peak is present in a range larger than 500 thousands and smaller than 3 million in a molecular weight distribution, and preparing a binder resin solution; (B) dispersing the binder resin solution as binder resin solution droplets into an aqueous medium; (C) removing the organic solvent from the binder resin solution droplets, and preparing a resin particle dispersion; and (D) aggregating resin particles from which the organic solvent is removed and colorant particles containing the colorant with each other, and forming toner particles. | 01-26-2012 |
20120028187 | METHOD OF PRODUCING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - A method of producing an electrostatic latent image developing toner includes: preparing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that comprises a polymerizable monomer comprising a vinyl-based double bond; extracting a liquid from the resin particle dispersion by heating; mixing the distilled resin particle dispersion with a colorant particle dispersion prepared by dispersing a colorant; and aggregating the resin particles, the pigment particles and a release agent particles to form aggregate particles, and then conducting heating to fuse the aggregate particles. | 02-02-2012 |
20120070776 | EMULSION AGGREGATION TONERS HAVING FLOW AIDS - The present disclosure provides processes for producing toners. In embodiments, flow aids are added to a wet cake including the toner particles, prior to drying. The addition of the flow aid improves flow characteristics of the toner, thereby enhancing overall drying time, reducing the amount of coarse particles, and improving yield, without adversely affecting fusing and charging of the toner particles. | 03-22-2012 |
20120070777 | METHOD AND APPARATUS FOR PRODUCING TONER - An apparatus for producing a toner, including a liquid droplet-forming unit configured to discharge a toner composition liquid containing at least a resin and a colorant at a uniform discharge speed from a plurality of discharge holes some of which have different shapes from each other to thereby form liquid droplets, and a particle-forming unit configured to solidify the liquid droplets of the toner composition liquid to thereby form particles. | 03-22-2012 |
20120082930 | Method for Producing Toner Block - There is provided a method for producing a toner block. The method includes: preparing a toner suspension in which toner particles are dispersed in water so that the toner suspension is a dilatant fluid; preparing an aggregate of the toner particles in a form of cake by absorbing water contained in the toner suspension by a water absorptive material; and drying the aggregate. | 04-05-2012 |
20120148950 | TONER PROCESSES UTILIZING WASHING AID - A process for making toner particles is provided. In embodiments, a suitable process includes adding a washing aid agent to toner particles at the time of washing the toner particles prior to their drying and recover. The washing aid agent assist in the removal of ionic species, including surfactants and ions that are part of the emulsion aggregation process, from the resulting toner particles. Utilization of the washing aid agent produces toner particles having improved charging characteristics. | 06-14-2012 |
20120148951 | SOLVENT-FREE BIO-BASED EMULSION - Solvent-free extrusion processes are disclosed that are suitable for forming high bio-based polyester latexes that may be utilized in forming a toner, as well as other commercial products. | 06-14-2012 |
20120156610 | TONER COMPOSITIONS AND PROCESSES - Processes for producing toners are provided. The processes include determining the desired gloss for a given toner, and determining the desired amount of aluminum in the toner to obtain that gloss. Utilizing the processes of the present disclosure, the solids content of an emulsion utilized to produce such a toner, as well as the mixing speed utilized in the aggregation process and the temperature at which aggregation of the toner particles occurs, may then be selected to obtain toner particles possessing the desired amount of aluminum, and thus the desired gloss. | 06-21-2012 |
20120183898 | 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 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. | 07-19-2012 |
20120189955 | EMULSION AGGREGATION TONERS - The present disclosure provides processes for producing toners. In embodiments, silica is added as a chelating agent during the toner production process contributing to enhanced triboelectric charging properties of the toner particles. | 07-26-2012 |
20120189956 | SOLVENT-FREE TONER PROCESSES - 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. | 07-26-2012 |
20120189957 | CHEMICAL TONER COMPOSITION AND METHOD FOR PREPARING THE SAME - The present invention relates to a chemical toner composition and a method for preparing the same. The chemical toner composition includes: a resin emulsion; a pigment dispersion; a wax dispersion; and a dispersible polymer coagulant, wherein the dispersible polymer coagulant is a copolymer comprising unsaturated ester monomers and amino-containing monomers. Accordingly, the present invention uses a novel dispersible polymer coagulant to prepare uniform toner particles with excellent roundness and improved flowability and to reduce moisture absorption. | 07-26-2012 |
20120208123 | 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 |
20120225382 | METHOD FOR MANUFACTURING TONER - A method of preparing toner. Due to the use of an inorganic salt of a monovalent metal as a coagulant when toner particles are aggregated, formed toner particles have a narrow particle size distribution, low-temperature fixability, and high image quality. | 09-06-2012 |
20120231391 | COLORED RESIN PARTICLES, MANUFACTURING METHOD OF THE COLORED RESIN PARTICLES AND TONER FOR ELECTROSTATICALLY CHARGED IMAGE DEVELOPMENT - Colored resin particles, each includes: a resin; and a colorant, wherein a value of average equivalent circle diameter A (μm) of the colored resin particles is 3≦A≦6, an average degree of circularity B of the colored resin particles satisfies the following expression (1), and | 09-13-2012 |
20120244470 | TONER COMPOSITIONS AND PROCESSES - Processes for producing toners are provided. The processes include emulsion aggregation processes, whereby a reactive coalescent is utilized in the coalescence step to coalesce aggregated particles, thereby forming toner particles. The resulting toners may be highly pigmented, and may possess low melt characteristics. | 09-27-2012 |
20120258396 | Method for Preparing Toner Containing Carbon Black Pigment With Low Surface Sulfur Levels - Disclosed is a process for preparing toner particles which comprises: (a) selecting a carbon black; (b) measuring the surface level of sulfur of the carbon black by X-ray Photoelectron Spectroscopy to ensure that the surface level of sulfur is no more than about 0.05 atomic percent; and (c) mixing the carbon black with a resin to generate a toner composition. | 10-11-2012 |
20120258397 | CO-EMULSIFICATION OF INSOLUBLE COMPOUNDS WITH TONER RESINS - A process for making a latex emulsion suitable for use in a toner composition includes co-emulsifying a bio-based resin with an insoluble component, such as a pigment or wax, whereby the resin encapsulates the insoluble component. The resulting latex, including the insoluble component encapsulated in the resin, may then be utilized to form a toner. The insoluble component may thus be included in toner particles, which might otherwise be difficult to achieve, using emulsion aggregation processes. | 10-11-2012 |
20120258398 | TONER COMPOSITIONS AND PROCESSES - Toners are provided, which possess low melt properties capable of producing a low gloss finish. Methods for providing these resins and toners are also provided which include the process of controlling the gloss of the toner utilizing a slow acid addition during coalescence optionally combined with little or no chelating agent added during the aggregation process. | 10-11-2012 |
20120264050 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - Disclosed is a production process of a toner for electrostatic image development, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. | 10-18-2012 |
20120270149 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - Disclosed is a production process of a toner for electrostatic image development, by which excellent toner particle size-controlling ability and moreover the sharpening of a particle size distribution are achieved. | 10-25-2012 |
20120282545 | TONER, METHOD FOR PRODUCING THE SAME, CARTRIDGE STORING THE SAME, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - According to one embodiment, a toner includes at least one encapsulated particle containing a color developable compound, color developer and a color eraser and polymeric particles. The at least one encapsulated particle and the polymeric particles being aggregated and fused in dispersion liquid. | 11-08-2012 |
20120288793 | METHOD FOR PRODUCING TONER - Disclosed is a method for producing toner. The method for producing toner by emulsion aggregation according to the present invention, comprises adjusting viscosity at a homogenization stage, to thereby obtain toner particles having a dense particle size distribution via a simple process. | 11-15-2012 |
20120301821 | METHOD FOR PRODUCING TONER - Disclosed is a method of producing toner. According to the method, a concentration of a dispersion stabilizer, a concentration of an aggregating agent, and a concentration of a hydrogen ion in a reaction solution of an aggregation process are controlled to produce toner particles having a narrow particle size distribution and excellent fixability, and providing a high quality image. | 11-29-2012 |
20120301822 | METHOD FOR PRODUCING TONER - Disclosed is method of preparing toner. According to the method, a concentration of a surfactant, a concentration of an aggregating agent, and a concentration of a hydrogen ion in a reaction solution of an aggregation process are controlled to produce toner particles having a narrow particle size distribution and excellent fixability, and providing a high quality image. | 11-29-2012 |
20120328980 | PRODUCTION PROCESS OF TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - The toner for electrostatic image development has excellent charge properties, by which excellent toner particle size-controlling ability is achieved, and moreover the sharpening of a particle size distribution is achieved. The toner is composed of toner particles containing a binder resin. The process has an aggregating step of adding an aggregating agent containing a transition element into an aqueous medium of dispersed fine binder resin particles to aggregate the fine binder resin particles, and an aggregation-stopping step of adding an aggregation stopper composed on a sulfur atom-containing compound exhibiting a reducing action on the aggregating agent. The aggregating agent is a salt of a bivalent or higher metal selected from Sr, Ti, V, Cr, Mn, Fe, Co, Ni and Cu. | 12-27-2012 |
20120328981 | PREPARATION METHOD FOR TONER BY USING ALKALI-SOLUBLE RESIN CONTAINING ACIDIC GROUP - Disclosed is a preparation method for a toner. Problems according to use of a surfactant can be solved and it is possible to prepare toner particles having a uniform distribution of particle size by using an alkali-soluble resin containing an acidic group. | 12-27-2012 |
20130108955 | PROCESS FOR PRODUCING TONER | 05-02-2013 |
20130122418 | Alkyl Benzene Sulfonate Surfactant Having An Ammonium Salt Counter Ion For Reduced Sodium Content In Emulsions - A process including contacting an alkyl benzene sulfonate surfactant having an ammonium salt counter ion with a component to be emulsified or dispersed, wherein the alkyl benzene sulfonate surfactant is substantially free of sodium salt counter ions such that the sodium content of the alkyl benzene sulfonate surfactant is less than about 5,000 parts per million, and water to form a mixture; using the alkyl benzene sulfonate surfactant to emulsify the component and form an emulsion; or using the alkyl benzene sulfonate surfactant to disperse the component and form a dispersion. | 05-16-2013 |
20130130174 | METHOD OF MANUFACTURING TONER - A method of manufacturing toner is provided. The method includes preparing a first liquid by dissolving or dispersing toner components in an organic solvent, preparing a second liquid by emulsifying the first liquid in an aqueous medium, and evaporating the organic solvent from the second liquid. The toner components include a colorant, a release agent, and one or both of a binder resin and a precursor thereof. The evaporating includes flowing down the second liquid as a liquid film in substantially a vertical direction along an inner wall surface of a pipe that is depressurized, heating the liquid film at a temperature not higher than a glass transition temperature of the binder resin, and supplying the pipe with a depressurized water vapor from a supply opening disposed on an upper part of the pipe. | 05-23-2013 |
20130244173 | SOLVENT-FREE BIO-BASED EMULSION - A process comprising:
| 09-19-2013 |
20130266897 | METHOD OF PRODUCING TONER - The present invention provides a toner excellent in low-temperature fixability and also excellent in heat-resistant storage property, offset resistance, and durability. In a process for producing a toner containing toner particles by emulsion aggregation, each toner particle includes a binder resin of which a main component is a block polymer having a crystal structure, a colorant, and a release agent; the binder resin includes polyester as a main component; the rate of a portion capable of forming a crystal structure to the binder resin is 50 to 80 mass %; a peak temperature Tp of a maximum endothermic peak attributed to the binder resin is 50 to 80° C. in endothermic amount measurement of the toner with a differential scanning calorimeter (DSC); and fused particles are heated at a heating temperature t (° C.) satisfying Tp′−15.0≦t≦Tp′−5.0 for at least 0.5 hr. | 10-10-2013 |
20130273472 | METHOD FOR MANUFACTURING TONER - Provided is a method for manufacturing a toner. By using a wax dispersion liquid containing silica, the toner which does not have an unpleasant odor can be achieved without influencing other physical properties of the toner. | 10-17-2013 |
20130280653 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, METHOD OF PRODUCING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, AND ELECTROSTATIC LATENT IMAGE DEVELOPER - A method of producing an electrostatic latent image developing toner that includes the steps of producing a resin particle dispersion by polymerizing, in a water-based solvent, a polymerizable monomer that includes a polymerizable monomer having a vinyl-based double bond, and washing the resin particle dispersion through contact with an organic solvent, wherein the washed resin particle dispersion, a colorant particle dispersion produced by dispersing a colorant, and a release agent particle dispersion produced by dispersing a release agent are mixed together, and following formation of aggregate particles by aggregation of the resin particles, the colorant particles and the release agent particles, heating is conducted to fuse the aggregate particles and produce the electrostatic latent image developing toner. | 10-24-2013 |
20130295503 | METHOD FOR MANUFACTURING TONER - Disclosed is a method for manufacturing toner. The method for manufacturing toner according to the present invention uses specific polyester resin to obtain toner with a wide range of fixing temperatures and superior gloss and density of image. | 11-07-2013 |
20130316284 | METHOD FOR PRODUCING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - The present invention relates to a process for producing a toner for development of electrostatic latent images which includes a step (1) of mixing and aggregating resin particles (A), releasing agent particles and an aggregating agent formed of a divalent to pentavalent amine salt in an aqueous medium to obtain aggregated particles, and a toner for development of electrostatic latent images obtained by the process. | 11-28-2013 |
20130323639 | Toner, Manufacturing Method Thereof and Image Forming Method - A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), R | 12-05-2013 |
20130344434 | Emulsion Aggregation Toner Formulation - An emulsion aggregation toner formulation for electrophotography and a method for preparation thereof. The emulsion aggregation toner formulation includes a polyester resin emulsion formed using an extruded polyester binder resin having a broad molecular weight distribution. The extruded polyester binder resin is formed using a plurality of polyester binder resins. Further, the emulsion aggregation toner formulation comprises at least one colorant dispersion and a wax dispersion. | 12-26-2013 |
20140147786 | PREPARATION OF POLYESTER LATEX EMULSIFICATION BY DIRECT STEAM INJECTION - A method for preparing latex emulsion compositions uses a steam-driven emulsification process, and a method for preparing a toner using the latex emulsion compositions. The method includes contacting a resin with an organic solvent and optionally a neutralization agent; and applying steam or heated water vapor to contact the resin to prepare a latex emulsion. An apparatus can perform the method. | 05-29-2014 |
20140162186 | INKS FOR LIQUID ELECTROPHOTOGRAPHY - A method of manufacturing a liquid electrophotographic ink includes: mixing a pigment with a resin powder; and microfluidizing the mixture together with a carrier fluid in a microfluidizer in a number of passes to form a concentrated ink containing composite particles. | 06-12-2014 |
20140170557 | Batch/Continuous Production of Toner - A process for forming toner using an emulsion/aggregation scheme wherein particle aggregation occurs in a batch reactor and coalescence occurs in a continuous reactor, with a space time yield of at least 200 g/L/hr. | 06-19-2014 |
20140170558 | Batch/Continuous Production of Toner - A process for forming toner using an emulsion/aggregation scheme wherein particle aggregation occurs in a batch reactor and coalescence occurs in a continuous reactor. In embodiments, a continuous reactor comprises four sections joined in series. | 06-19-2014 |
20140170559 | METHOD FOR MANUFACTURING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - Regarding a method for manufacturing an electrostatic latent image developing toner, which includes a process for aggregating particulates of components such as a binder resin, a colorant, and a releasing agent, a dispersion solution of binder resin particulates obtained by a specific method is used. The dispersion solution of the binder resin particulates are prepared as an oil-in-water emulsion containing particulates including the binder resin by mixing the binder resin, which is polyester resin, in a molten state with an organic base in a liquid state so as to neutralize the binder resin and subsequently mixing a resin molten solution with water. The amount of use of the organic base is 6 parts by mass or more with respect to 100 parts by mass of the binder resin. The degree of neutralization of the binder resin neutralized by the organic base is 100% or more. | 06-19-2014 |
20140248560 | PROCESS FOR PREPARING A PARTICULATE SOLID AND A PARTICULATE SOLID - A process for preparing a particulate solid is described, which comprises the steps of a) aggregating a dispersion comprising the particles i) and ii) and a liquid medium, wherein i) is 25 to 50 parts by weight of non-polymeric particles having an average particle size of from 1 to 10 microns and having a density of no more than 4 g/cm | 09-04-2014 |
20140255842 | PHASE IMMERSION EMULSIFICATION PROCESS AND APPARATUS - A method for preparing a latex or dispersion, the method comprising contacting at least one resin with an organic solvent to form a resin mixture; neutralizing the resin mixture with a neutralizing agent; and subjecting the resin mixture flow to steam flow in a continuous manner to form a dispersion. A method for forming toner, the method comprising: contacting a resin to an organic solvent and a neutralizing agent to form a resin mixture; subjecting the resin mixture flow to a steam flow in a continuous manner to form a dispersion; aggregating particles from a pre-toner mixture, the pre-toner mixture comprising the dispersion, an optional colorant, and an optional wax; and coalescing the aggregated particles to form toner particles. An apparatus that can perform the methods. | 09-11-2014 |
20140287358 | METHOD FOR PRODUCING ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - In producing an electrostatic latent image developing toner, fine particle aggregates are formed by aggregating fine particles containing a binder resin and fine particles containing a release agent in an aqueous medium in the presence of an aggregating agent containing an alkali metal sulfate, and toner particles are formed by coalescing components contained in the fine particle aggregates in an aqueous medium in the presence of hydroxypropyl methyl cellulose. | 09-25-2014 |
20140295346 | EMULSION AGGREGATION PROCESS - The method of manufacturing toners disclosed herein includes a continuous temperature ramp and coalescence process that involves continuously passing toner slurry, such as an aggregated toner slurry, through at least one heat exchanger before being subjected to a cooling step. The heat exchanger is pressurized, so the temperature of the slurry may be increased above the atmospheric boiling point of water without boiling the water component of the slurry. Because of these higher temperatures, the coalescence step can be completed more quickly than in conventional batch processes. More than two heat exchangers may be connected in the coalescence step, yielding multiple ramping/cooling temperature steps, ability to inject components, or recycling heat from the process to reduce energy consumption. | 10-02-2014 |
20140308612 | METHOD AND SYSTEM FOR MAGNETIC ACTUATED MIXING TO PREPARE LATEX EMULSION - A method and system for magnetic actuated mixing which use magnetic particles and magnetic field to facilitate the mixing for preparing latex emulsion. In embodiments, a suitable process includes dissolving a resin in an organic solvent, optionally adding a surfactant, adding a neutralization agent and water, adding magnetic particles, and subjecting the mixture to a magnetic actuated mixing to form a latex emulsion. In embodiments, the latex emulsion thus produced may be utilized to form a toner. | 10-16-2014 |
20140349232 | TONER PRODUCTION METHOD - A method for producing a toner that comprises toner particles, each of which comprises a binder resin, which comprises a resin (A) capable of forming a crystalline structure, and a colorant, the method including: a pressure holding step of, after preparing toner particles, holding the toner particles for 5 minutes or more at a pressure of 2.0 MPa or more under conditions of a temperature T1 (° C.) represented by formula (1): | 11-27-2014 |
20150024323 | PROCESS FOR PREPARING LATEX COMPRISING CHARGE CONTROL AGENT - A process includes forming, by emulsion polymerization, polymer resin particles in a latex, the polymer resin particles being formed from a mixture including one or more monomer emulsions and a non-surfactant-based charge control agent, the emulsion polymerization is carried out with a solids content in a range from about 10 to about 30 percent by weight of the mixture, and forming toner particles from the polymer resin particles, the toner particles support a sufficient triboelectric charge for use under A-zone environmental conditions in a single-component development system. | 01-22-2015 |
20150099226 | TONER PROCESSES - A method for preparing toner particles is disclosed. In embodiments, a suitable method includes aggregating a mixture comprising at least one resin, an optional pigment and an optional wax to form aggregated particles, freezing aggregation of particles by adjusting the pH of the aggregated particles to a freezing aggregation pH; coalescing the aggregated particles to form toner particles at a first pH that is higher than the freezing aggregation pH; and recovering the toner particles. | 04-09-2015 |
20150111151 | CONTINUOUS TONER COALESCENCE PROCESSES - Processes for continuously coalescing particles from an aggregated particle slurry are disclosed. An aggregated particle slurry is further heated in a first heat exchanger, and the heated slurry then flows through a residence time reactor. The slurry, now containing coalesced particles, then flows through a second heat exchanger and is quenched. The recovered coalesced particle slurry is then suitable for washing and drying. No moving parts are needed in this system. | 04-23-2015 |
20150370183 | METHOD OF PRODUCING ELECTROPHOTOGRAPHIC TONER, TONER CARTRIDGE, AND IMAGE FORMING APPARATUS - A method of producing an electrophotographic toner includes aggregation and fusion steps. The aggregation step includes obtaining aggregates by mixing a first dispersion that contains pigment particles with a second dispersion that contains fine resin particles, and aggregating the pigment particles and the fine resin particles. The fusion, step includes fusing the pigment particles and the fine resin particles by heating the aggregates. When the first dispersion is mixed with the second dispersion, the sign of the mean of seta potential of the pigment particles in the first dispersion is set to foe opposite to the sign of the mean of zeta potential of the fine resin particles in the second dispersion. In the first dispersion, the proportion of the pigment particles out of the total, having a sign opposite to the sign of the mean of zeta potential of the pigment particles is 10% or less. | 12-24-2015 |
20160004175 | Magenta Toner - A process for making a latex emulsion where distillation occurs at an elevated temperature is used to make resin particles with a conditioned surface which can be used to make magenta toner with increased efficiency. | 01-07-2016 |
20160124331 | SYSTEM AND METHOD FOR CONVENTIONAL PARTICLE ROUNDING UTILIZING CONTINUOUS EMULSION-AGGREGATION (EA) TECHNOLOGY - In an exemplary embodiment of the invention, a continuous process for rounding conventional toner particles includes forming a conventional toner particle slurry by mixing a dispersant and/or a liquid with dry toner particles, heating the conventional toner particle slurry to a first temperature beyond its glass transition temperature to form a coalesced toner particle slurry, quenching the coalesced toner particle slurry to a second temperature below the glass transition temperature after a residence time has elapsed, and recovering the quenched particle slurry at an outlet wherein the circularity of the conventional toner particles in the quenched toner particle slurry is from approximately 0.940 to 0.999 and the time frame for the heating, quenching and recovering steps is less than 20 minutes. An apparatus for practicing the novel continuous coalescence of toner particles, includes an inlet passage, a first heat exchanger coupled to the inlet passage, a residence time coil coupled to the first heat exchanger, a cooling device coupled to the residence time coil; and an outlet passage coupled to the cooling device. | 05-05-2016 |
20160139519 | ELECTROSTATIC IMAGE DEVELOPING TONER - The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount. | 05-19-2016 |
20160139520 | Method for Making Color Toner - A process for making colored polyester latex by phase inversion emulsification is described. | 05-19-2016 |