Patent application number | Description | Published |
20080241723 | EMULSION AGGREGATION TONER COMPOSITIONS HAVING CERAMIC PIGMENTS - Emulsion aggregation toner particles comprising at least one binder resin and a colorant, wherein the colorant comprises at least one ceramic pigment. | 10-02-2008 |
20080299478 | Toner compositions - The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a carboxylic acid may be added to materials utilized to produce a latex and reduce the particle size of the resulting latex particles and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the carboxylic acid. | 12-04-2008 |
20090081572 | SINGLE COMPONENT DEVELOPER - A toner for use in a single component development system, said toner including emulsion aggregation toner particles with a styrene acrylate polymer binder resin having a 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, 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 |
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 |
20090081576 | Toner compositions - The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a carboxylic acid may be added to materials utilized to produce a latex in forming a seed resin or a master batch which, in turn, may be utilized to form latex resins and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the carboxylic acid. | 03-26-2009 |
20090123865 | TONER COMPOSITION HAVING FLUORINATED POLYMER ADDITIVE - A toner having a core with at least one resin and at least one colorant, and having physically attached on a surface thereof, an additive package including fluorinated polymer particles, and a method of forming toner particles having surface particles attached thereto, wherein the surface particles include fluorinated polymer particles, and the method includes aggregating a material with at least one resin and at least one colorant to produce toner particles, following aggregation, forming a mixture of the surface particles and the toner particles, and subjecting the mixture to a temperature above the glass transition temperature of the toner particles to coalesce the toner particles, whereby the surface particles become at least partially embedded within the surface of the toner particles. | 05-14-2009 |
20090136863 | EMULSION AGGREGATION TONER HAVING ZINC SALICYLIC ACID CHARGE CONTROL AGENT - A toner for developing electrostatic images including emulsion aggregation toner particles with a styrene acrylate latex resin, at least one additive, at least one colorant, and a charge control agent comprising 3,5 di-tert-butylsalicyclic acid zinc salt. | 05-28-2009 |
20090263740 | TONER COMPOSITIONS - The present disclosure provides processes for reducing the particle size of latex resins and toners produced with such resins. In embodiments, a gel latex may be formed as a seed particle and then utilized to form latex resins and toner particles. In accordance with the present disclosure, one may be able to utilize materials for the production of latex resins and toners which may otherwise produce particles that are too large in the absence of the gel latex. | 10-22-2009 |
20100313644 | NOVEL CHARACTERIZATION TOOLS FOR TONER ADHESION AND ADHESION DISTRIBUTION - A system, method and device for measuring toner performance by randomly applying a toner sample having toner particles to a substrate, and positioning the substrate such that a force may be applied to individual particles of the measuring toner. A rolling resistance or rotation of the individual particles of the measuring toner is measured. The measurements may be analyzed to determine adhesion and distribution properties of individual toner particles of the measuring toner sample. | 12-16-2010 |
20110086304 | TONER COMPOSITIONS - The present disclosure provides toners and methods for their production. In embodiments, the toner may include a core/shell configuration, with a non-crosslinked resin and a crosslinked resin in the core, with a second non-crosslinked resin in the shell, pigment/pigments and a wax possessing both branched and linear carbons. | 04-14-2011 |
20110086306 | TONER COMPOSITIONS - A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the charge control agents include copolymers formed by an emulsion polymerization process. | 04-14-2011 |
20120129088 | NON-MAGNETIC SINGLE COMPONENT EMULSION/AGGREGATION TONER COMPOSITION - A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and HMDS silica. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry theological properties. These improved properties make this toner composition useful for higher speed printing while using less toner. | 05-24-2012 |
20120129089 | TONER COMPOSITIONS AND DEVELOPERS CONTAINING SUCH TONERS - A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and two HMDS silicas. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry rheological properties and improved fix properties. These improved properties make this toner composition useful for higher speed printing while using less toner. | 05-24-2012 |
20120225378 | Toner Composition Having Dual Wax - Included is an emulsion aggregation toner formulation having at least one latex and a combination of at least two waxes, wherein one wax is a synthetic wax, and another wax is a natural wax, and further including a developer containing a carrier and the just-described toner. | 09-06-2012 |
20120288790 | Clear Styrene Emulsion/Aggregation Toner - The present disclosure describes processes for making clear, high-gloss toners, including toner compositions resulting from such processes that find applications in overcoating and gloss enhancement. | 11-15-2012 |
20130101935 | Toner Composition - A toner is described containing low melt wax and having a core and shell, which toner exhibits improved fusing performance as compared to a toner produced with a high melt wax in the core; having a core resin with a T | 04-25-2013 |
20130157188 | Colored Toners - Disclosed is a toner composition comprising: (a) a resin; and (b) a colorant which comprises: (1) Pigment Red 269; (2) Pigment Red 185; and (3) Pigment Red 122. | 06-20-2013 |
20130236825 | TONER COMPOSITION WITH CHARGE CONTROL AGENT-TREATED SPACER PARTICLES - Toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that cause protrusions from the toner particle surface. | 09-12-2013 |
20130252162 | TONER COMPOSITIONS - A process includes forming particles in a latex by emulsion polymerization of a mixture including one or more monomers in an emulsion, and about 4 percent or less by weight of the mixture of a non-surfactant-based charge control agent, the non-surfactant-based charge control agent is distributed within a matrix of the particles, and forming toner particles from the particles in the latex, the toner particles supporting a sufficient triboelectric charge for use under A-zone environmental conditions in a single-component development system. | 09-26-2013 |
20130260303 | LOW GLOSS MONOCHROME SCD TONER FOR REDUCED ENERGY TONER USAGE - A toner composition including toner particles that have a resin, an optional wax, and an optional colorant; and a surface additive at least partially coating toner particle surfaces. The surface additive includes a mixture of a hexamethyldisilazane (HMDS) surface treated silica, a sol-gel silica that is not surface treated, and a polydimethylsiloxane (PDMS) surface treated silica. | 10-03-2013 |
20130280651 | TONER COMPOSITIONS - A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles. | 10-24-2013 |
20140120467 | TONER COMPOSITIONS - A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which the toner particles are made without a shell which provides homogenous distribution of the charge control agents, providing a toner with higher charge and better environmental stability | 05-01-2014 |
20140127620 | POLYMERIZED CHARGE ENHANCED SPACER PARTICLE - A toner particle has a core and a shell surrounding the core, wherein the shell contains a polymerized charge enhanced spacer particle, which is a copolymer of a charge control agent and a monomer. A method of making toner particles includes forming a slurry by mixing together a first emulsion containing a resin, optionally a wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additive, heating the slurry to form aggregated particles in the slurry, forming a second emulsion containing a monomer and a charge control agent, polymerizing the second emulsion to form a copolymer of the monomer and the charge control agent, and incorporating the copolymer into the toner particles, wherein the aggregated particles form a core of the toner particles. | 05-08-2014 |
20140162181 | Black Toner - The present disclosure describes a black single component toner with desirable fusing performance. | 06-12-2014 |
20140162184 | Color Toner - The present disclosure describes a color single component toner with desirable fusing performance. | 06-12-2014 |
20140255841 | TONER COMPOSITIONS - A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles. | 09-11-2014 |
20140272701 | TONER PARTICLE FOR HIGH SPEED SINGLE COMPONENT DEVELOPMENT SYSTEM - A toner composition includes toner particles containing a resin; an optional wax; and an optional colorant, wherein the resin is a three latex system including a latex core, a latex shell, and a latex gel; and a glass transition temperature Tg of the latex core is lower than a glass transition temperature Tg of the latex shell. A method of making a toner composition includes blending a latex core resin including a base polymer and a latex gel and optional additives; adding a coagulant and an acid; homogenizing the slurry; raising the temperature to a value close to the glass transition temperature of the latex core resin while stirring to form aggregated particles having a size of from about 3 to about 9 μm; adding a latex shell resin to the slurry at a controlled rate to form a batch containing toner particles having a core and a shell; adding a pH adjustment agent to the batch to freeze growth of the toner particles; coalescing the batch by increasing the temperature to a coalescence temperature that is above a glass transition temperature of the shell; monitoring the batch for particle circularity; and recovering the toner particles. | 09-18-2014 |
20140315123 | Clear Toner Composition - Disclosed is an emulsion aggregation toner substantially free of added colorants comprising a resin and a silicone wax of the formula | 10-23-2014 |
20140315127 | Single Component Developer Composition - Emulsion aggregation toner comprising: a resin; a wax; a colorant; an encapsulating shell; and a silica external additive comprising: first silica particles comprising fumed silica particles surface treated with octyldimethylsiloxane and having average particle diameter about 6-20 nm, present in amount of about 0.1-1% by weight of the toner; second silica particles comprising colloidal silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 80-200 nm, present in amount of about 1-2% by weight of the toner; third silica particles comprising fumed silica particles surface treated with polydimethylsiloxane and having average particle diameter about 25-65 nm, present in amount of from about 0.5-1.5% by weight of the toner; and fourth silica particles comprising fumed silica particles surface treated with hexamethyldisiloxane and having average particle diameter about 25-65 nm, present in amount of about 1-2.5% by weight of the toner. | 10-23-2014 |
20140356776 | CORE/SHELL CHARGE CONTROL LATEX FOR EA PARTICLES - A toner particle includes a core including at least one resin, optionally a wax, and a colorant, and a shell comprising at least one charge control agent. The core is substantially free of the charge control agent. The toner particle has improved charging performance compared with core-shell toner particles having the charge control agent in the core of the toner particle. | 12-04-2014 |
20140370430 | LOW COST, LOW MELT EMULSION AGGREGATION HIGH GLOSS TONERS WITH LOW MELT WAXES - A toner particle includes a core containing a styrene-based resin; a low melting point wax; optionally an additive package; and optionally a colorant, wherein the low melting point wax has a melting point of less than about 80° C. A method of making a toner particle includes forming a slimy by mixing together an emulsion containing a resin, a low melting point wax, optionally a colorant, optionally a surfactant, optionally a coagulant, and one or more additional optional additives; and heating the slurry to form aggregated particles in the slurry, wherein the aggregated particles form a core of the toner particles; and the low melting point wax has a melting point of less than about 80° C. | 12-18-2014 |
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 |
20150044606 | POROUS TONER AND PROCESS FOR MAKING THE SAME - A process includes forming a filter cake from a slurry of emulsion aggregation toner particles and washing the filter cake with an alcohol to create porous toner particles. | 02-12-2015 |