Patent application number | Description | Published |
20080241724 | TONER COMPOSITIONS INCLUDING STYRENE CONTAINING EXTERNAL ADDITIVES - Toner compositions of toner particles including additive particles upon an external surface of the toner particles, wherein the additive particles include crosslinked styrene containing polymer particles, exhibit reduced sensitivity to relative humidity. The crosslinked styrene containing polymer particles have an average particle size of from about 30 nm to about 300 nm, and may include styrene homopolymer particles, styrene copolymer particles or mixtures thereof. A process of reducing the relative humidity sensitivity of toner using such external surface additive is also described. | 10-02-2008 |
20080319129 | Preparing Aqueous Dispersion of Crystalline and Amorphous Polyesters - Processes for generating aqueous dispersions for use in the emulsion/aggregation technique, by combining crystalline polyester resin, amorphous polyester resin and water, heating and agitating the mixture and generating an aqueous dispersion containing both crystalline polyester resin particles and amorphous polyester resin particles. | 12-25-2008 |
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 |
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 |
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 |
20100316946 | SELF EMULSIFYING GRANULES AND SOLVENT FREE PROCESS FOR THE PREPARATION OF EMULSIONS THEREFROM - A process for making a self-emulsifying composite suitable for use in forming latex emulsions includes contacting a resin with a solid or highly concentrated surfactant, a solid neutralizing agent in the absence of water and an organic solvent to form a mixture, melt mixing the mixture, and forming a self-emulsifying composite of the melt mixed mixture such as a granule. Self-emulsifying granules are also provided and configured to form a latex emulsion when added to water, which may then be utilized to form a toner. | 12-16-2010 |
20110033793 | TONER PROCESSES - Toners are provided which may be suitable for use in cold fusing pressure apparatus. The toners include low molecular weight amorphous resins having low softening points and low molecular weights, compared with resins utilized in conventional emulsion aggregation toners for low melt fusing applications. | 02-10-2011 |
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 |
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 |
20110196066 | PROCESSES FOR PRODUCING POLYESTER LATEXES VIA SOLVENT-FREE EMULSIFICATION - A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one amorphous polyester resin with a viscosity reducing additive in the absence of an organic solvent to form a resin mixture either via an extruder or batch process, and adding a surfactant, neutralizing agent, and deionized water to the resin mixture. | 08-11-2011 |
20110217647 | TONER COMPOSITIONS AND PROCESSES - Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures. | 09-08-2011 |
20110250535 | TONER COMPOSITIONS AND PROCESSES - The present disclosure provides processes for producing polyester 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 compound, at the beginning of coalescence, which speeds the coalescence process and produces toner particles having a desired size and circularity for use in electrophotographic imaging systems. | 10-13-2011 |
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 |
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 |
20130244151 | Chemical Toner Including A Robust Resin For Solvent-Free Emulsification - A toner comprising a branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described; an optional wax, and an optional colorant. | 09-19-2013 |
20130245197 | Robust Resin For Solvent-Free Emulsification - A branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described. | 09-19-2013 |