Class / Patent application number | Description | Number of patent applications / Date published |
430108300 | Organic heavy metal, aluminum, or silicon compound adjuvant | 76 |
20080227011 | TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - A toner including a binder resin, a colorant, and a silicon-containing polymer, which is manufactured by a method including: discharging a toner constituent liquid including toner constituents including the binder resin, the colorant, and the silicon-containing polymer, from at least one discharge opening to form liquid droplets thereof; and converting the liquid droplets into solid toner particles in a granulation space. | 09-18-2008 |
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 |
20080261137 | CHARGE CONTROL AGENT AND TONER COMPRISING THE SAME - Discussed herein are a charge control agent and toner comprising said charge control agent. Said toner of the invention is comprised of a resin, a colorant, and the charge control agent, wherein, said charge control agent is comprised of a specific type of metal complexes. In the invention, the charge control agent has excellent charge control properties and the characteristics of uniform crystalline size, high charge speed, high thermo stability, low moisture absorption, and good compatibility with resin. The toner of the invention has excellent electrical characteristics and produces stable image of high quality under a wide range of environmental conditions without dusting and fogging. | 10-23-2008 |
20090017390 | EXTERNAL TONER ADDITIVE, TONER AND IMAGE FORMING APPARATUS USING THE SAME - To provide a toner and an image forming apparatus using the toner, the toner contains an external additive that can suppress adherence of impurities to a discharge electrode of a corona discharger and prevent occurrence of charging unevenness. The external toner additive is comprised of a particulate metal oxide with trimethylsilyl groups introduced on the surface thereof, the volatile amount of trimethylsilanol being specified to be 0.25 μg or below based on a method for quantitative analysis of trimethylsilanol in the external additive. The toner of the present invention is specified such that the volatile amount of trimethylsilanol is specified to be 0.02 μg or below based on a method for quantitative analysis of trimethylsilanol in the toner. | 01-15-2009 |
20090104554 | CHARGE CONTROL AGENT COMPOSITION AND TONER UTILIZING THE SAME - The present invention provides a modified charge control agent composition exhibiting a high charge-imparting effect, and an electrostatic image developing toner containing such a charge control agent composition and having a high electrostatic charge amount and an environmental stability. | 04-23-2009 |
20090111040 | RESIN-COATED PEARLESCENT OR METALLIC PIGMENT FOR SPECIAL EFFECT IMAGES - A pigment particle coated with at least one of a resin and a charge control surface additive, wherein the pigment particle is a pearlescent or metallic pigment. The pigment adds pearlescent effects and is a size and charge as to be used as a toner material in electrostatographic image formation. | 04-30-2009 |
20090111041 | ELECTROPHOTOGRAPHIC TONER - The purpose of the present invention is to provide an electrographic toner, which is used for an image forming method of electrophotography, and particularly, used for mono-component development. The toner has a stable charge property, can form a toner layer on a developing sleeve wherein the thickness thereof is suitable and uniform, can achieve long-life property while a high image density is maintained (an image having a high image density is printed even when a large number of printings are conducted in succession), and achieves small toner consumption. In order to achieve this, an electrophotographic toner is proposed wherein at least inorganic particles, conductive metal oxide fine particles and carbon black are adhered to the surface of matrix toner particles, and the inorganic particles are surface-treated with cyclic silazane and have the specific surface area of 100 to 175 m | 04-30-2009 |
20090130582 | TONER AND IMAGE FORMING PROCESS - A toner which has i) toner base particles containing at least a binder resin and a colorant and ii) a fatty acid metal salt composition as an external additive. The fatty acid metal salt composition contains a nonionic surface-active agent and a fatty acid metal salt. This toner and an image forming process making use of the toner can keep the toner from adhering to a toner carrying member throughout running, promise a stable chargeability of the toner and can keep any deterioration of halftone image quality from being caused by excess charging of the toner and any image fog from being caused by insufficient charging of the toner. | 05-21-2009 |
20090176169 | TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, AND IMAGE FORMING METHOD USING THE TONER - A toner for developing electrostatic latent images, including a binder resin; and a colorant, wherein the toner further includes propyleneglycolmonomethylether in an amount of from 30 to 200 ppm. | 07-09-2009 |
20090233202 | TWO COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A two component developer comprising a toner and a carrier, wherein the toner includes: colored particles; and external additive particles comprising a complex oxide incorporating silicon atoms and at least one of titanium atoms and aluminum atoms, and a surface existing ratio of the silicon atoms (R | 09-17-2009 |
20090325098 | FERROMAGNETIC NANOPARTICLES WITH HIGH MAGNETOCRYSTALLINE ANISOTROPY FOR MICR TONER APPLICATIONS - A toner including stabilized magnetic single-crystal nanoparticles, wherein the value of the magnetic anisotropy of the magnetic nanoparticles is greater than or equal to 2×10 | 12-31-2009 |
20100151373 | Toner Particle Having Excellent Charging Characteristics,Long term Credibility and Transferring Property, Method for Producing the Same and Toner Containing Said Toner Particle - The invention relates to toner particles having excellent charging characteristics and transferring properties, a method for producing the same and toner including the same. More particularly, the invention relates to toner particles, a method for producing the same and toner including the same, in which a CCA highly compatible with a binder resin is readily dispersed in the binder resin, thereby improving charge-maintaining property and charge distribution, and the resultant mixture is sphered to realize excellent long term credibility and transfer property. The toner particles include a styrene/acrylate-based CCA; a styrene/acrylate-based binder resin; and a polyester-based binder resin. | 06-17-2010 |
20100159375 | TONERS CONTAINING POLYHEDRAL OLIGOMERIC SILSESQUIOXANES - Disclosed is a toner composition comprising toner particles which comprise a resin, an optional colorant, and a polyhedral oligomeric silsesquioxane compound. | 06-24-2010 |
20100159376 | TONERS CONTAINING POLYHEDRAL OLIGOMERIC SILSESQUIOXANES - Disclosed is a toner composition comprising toner particles which comprise (a) a resin having chemically bonded thereto a polyhedral oligomeric silsesquioxane, (b) and an optional colorant. | 06-24-2010 |
20100266943 | MAGNETIC TONER - To provide a toner excellent in low-temperature fixability, releasing performance, and development stability in long-term use under a high-temperature and high-humidity environment, provided is a magnetic toner including: magnetic toner particles each containing at least a binder resin and a magnetic particles; and an inorganic fine powder, in which: the magnetic particles is a treated magnetic particles treated with a silane compound; the treated magnetic particles has a water adsorption per unit area based on a BET specific surface area of 0.300 mg/m | 10-21-2010 |
20100297545 | Preparation Method of Composite Silica Nanoparticles with Monodispersity - The present invention provides a preparation method of composite silica microparticles with monodispersity, comprising the steps of: (a) adding at least one precursor selected from a titania precursor and an alumina precursor, and a silica precursor to a solvent, which are hydrolyzed to form composite silica microparticles; (b) drying and calcining the composite silica microparticles; and (c) hydrophobically treating the calcined composite silica microparticles. | 11-25-2010 |
20110045396 | Charge Controlling Agent and Toner Using Metal Compound of Cyclic Phenol Sulfide - The present invention discloses a charge control agent which comprises a metal compound of a cyclic phenol sulfide of the following formula ( | 02-24-2011 |
20110053073 | TONER - A toner is provided which is excellent in development stability in both a low-temperature, low-humidity environment and a high-temperature, high-humidity environment over a long time period. The toner includes toner particles containing at least a binder resin and a colorant, and a fatty acid metal salt. The fatty acid metal salt has a volume-based median diameter (D50s) of 0.15 μm or more and 0.65 μm or less, and the liberation ratio of the fatty acid metal salt in the toner is 1.0% or more and 25.0% or less. | 03-03-2011 |
20110065037 | LATENT ELECTROSTATIC IMAGE DEVELOPING CARRIER, TWO-COMPONENT DEVELOPER AND IMAGE FORMING METHOD - A latent electrostatic image developing carrier including a carrier core material, and a coating layer containing a resin and provided on a surface of the carrier core material, wherein the coating layer includes a particulate material containing at least first fine conductive particles and second fine conductive particles, and wherein the first fine conductive particles and the second fine conductive particles satisfy the relationships expressed by Expressions 1 and 2, 3≦D1/D2≦15 . . . Expression 1, where D1 denotes a dispersed particle diameter of the first fine conductive particles and D2 denotes a dispersed particle diameter of the second fine conductive particles, and −7E≦R1×R2≦8E . . . Expression 2, where R1 denotes a powder specific resistance of the first fine conductive particles and R2 denotes a powder specific resistance of the second fine conductive particles. | 03-17-2011 |
20110091802 | CARRIER, METHOD FOR PREPARING THE CARRIER, DEVELOPER USING THE CARRIER, DEVELOPER CONTAINER, AND IMAGE FORMING METHOD AND PROCESS CARTRIDGE USING THE DEVELOPER - The carrier is used for a two-component developer for developing an electrostatic latent image, and includes a particulate magnetic core material; and a cover layer located on a surface of the core material and including a crosslinked material and barium sulfate. The cover layer is formed by applying a coating medium including barium sulfate, a copolymer including a unit (A) having a specific acrylic siloxane structure including a tris(trialkylsiloxy)silanyl group and a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a condensation reaction catalyst, heating the applied medium to a temperature of from 100° C. to 230° C. so that the copolymer is hydrolyzed to produce a material having a silanol group, and the material and the catalyst are subjected to a condensation reaction to form the crosslinked material. | 04-21-2011 |
20110177444 | ADDITIVE PACKAGE FOR TONER - An additive package is provided for use with toners. The additive package may be utilized with ultra low melt toners formed by emulsion aggregation processes. The additive package of the present disclosure provides toners with a low minimum fusing temperature to enable high speed printing. Toners possessing the additive package of the present disclosure also possess wide fusing latitude, good release, high gloss, high blocking temperature, robust particles, excellent triboelectric charge properties, and the like. | 07-21-2011 |
20110229814 | TONER, METHOD OF MANUFACTURING TONER, AND IMAGE FORMING METHOD USING TONER - A toner containing a mother toner particle containing a binder resin, a releasing agent, and a coloring agent and an external additive comprising an inorganic particulate, which is mixed with the mother toner particle in a mixing process by a mixer, wherein the external additive is isolated from the mother toner particle by ultrasonic vibration and collected, in an aqueous solution comprising a polyoxyethylene lauryl ether compound serving as a surface active agent, in an amount of from 0.1 ppm to 10 ppm/(toner 4 g/100 ml) as measured by atomic absorption spectrometry. | 09-22-2011 |
20110229815 | LIGHT FIXABLE TONER AND TWO-COMPONENT DEVELOPER - A light fixable toner which is not containing an infrared absorbent and fixed by light irradiation, and a two-component developer containing the light fixable toner are provided. The light fixable toner contains a binder resin, a colorant and an internal additive having an average particle size of 0.50 μm or more and 1.40 μm or less, and a shape factor SF-2 is 105 or more and 120 or less, a relative refractive index n | 09-22-2011 |
20120070771 | ELECTROPHOTOGRAPHIC TONER - Disclosed is an electrophotographic toner, comprising: toner base particles having a volume average particle diameter of 3 μm or more and 7 μm or less; OTES-treated silica particles which are treated with octyltriethoxysilane (OTES) and are externally added to the toner base particles; and silica-coated titanium oxide particles which are coated with silica and are externally added to the toner base particles along with the OTES-treated silica particles, wherein the ratio (A) of the amount of the OTES-treated silica particles to the amount of the toner base particles, the ratio (B) of the amount of the silica-coated titanium oxide particles to the amount of the toner base particles, and the ratio (C) of the amount of particles to be externally added to the toner base particles to the amount of the toner base particles satisfy the following relations: 1% by mass≦(A)≦6.9% by mass; 0.1% by mass≦(B)≦2% by mass; 3% by mass≦(C)≦7% by mass; and 0.15≦(A)/(C)<1. | 03-22-2012 |
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 |
20120148948 | ELECTROSTATIC IMAGE DEVELOPING TONER, ELECTROSTATIC IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - An electrostatic image developing toner contains a binder resin and at least two different kinds of white pigments, wherein from about 10% by weight to about 30% by weight of the at least two kinds of white pigments is porous titanium oxide having a volume average particle diameter of from about 0.01 μm to about 1 μm, a particle size distribution (volume average particle size distribution index GSDv) of from 1.1 to 1.3 and a BET specific surface area of from about 250 m | 06-14-2012 |
20120295189 | BICOMPONENT DEVELOPING AGENT - A two-component developer including at least a toner and a carrier. The toner includes a coloring particle prepared by agglutinating and fusing a resin particle having colorants and a resin particle having wax, and 0.2-2.0 wt. % hydrophobic silica and 0.01-1.0 wt. % a hydrotalcite-like compound as external additives. A shape coefficient of the toner is 0.93-0.99. The carrier includes at least a magnetic particle coated with a silicone resin layer, with a volume average particle diameter of 20-100 μm. | 11-22-2012 |
20120315573 | CHARGE CONTROL AGENT COMPOSITION AND TONER UTILIZING THE SAME - The present invention provides a modified charge control agent composition exhibiting a high charge-imparting effect, and an electrostatic image developing toner containing such a charge control agent composition and having a high electrostatic charge amount and an environmental stability. | 12-13-2012 |
20120322003 | NATURAL OIL-BASED CHEMICALLY PRODUCED TONER - A natural oil-based toner resin for producing toner in developing electrophotographic image comprising a copolymer of unsaturated polyester resins and vinyl monomers, wherein the polyester resins have a molecular weight of 500 to 30000 and obtained from polycondensation between a polycarboxylic acid, a natural oil or derivative thereof and a polyol. The toner resin in emulsion form is mixed with fine suspensions or emulsions of a colourant and a charge control agent; and a flocculating agent is incorporated therein to induce aggregation for forming particles of desired sizes, and subsequently the temperature is suitably raised to cause coalescence to produce raw toner particles of regular shape and smooth surface. The raw toner particles are washed and dried, and treated with suitable additives to produce the finished product of chemically produced toner. | 12-20-2012 |
20130029259 | DEVELOPER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND IMAGE FORMING METHOD - A developer for electrostatic latent image development including a positively chargeable toner and a fatty acid metal salt is used, in which the fatty acid metal salt is a metal salt selected from the group consisting of zinc, calcium, and magnesium salts of fatty acids of 12 to 20 carbon atoms and has a certain volume average particle diameter and particle size distribution. | 01-31-2013 |
20130040235 | POSITIVELY CHARGEABLE TONER - In a positively chargeable toner, calcium carbonate fine particles having a certain average primary particle diameter are attached to the surface of toner base particles. The toner base particles contain at least a binder resin and a colorant. The calcium carbonate fine particles are ones which had been subjected to a surface treatment with a positively chargeable surface treating agent and a silicone oil. A mass ratio of the positively chargeable surface treating agent to the silicone oil attached to the surface of the calcium carbonate fine particles is set to be 7:3 to 3:7 in terms of the positively chargeable surface treating agent:the silicone oil. | 02-14-2013 |
20130065174 | TONER - An object of the present invention is to provide a toner in which a charging amount and rise of the charging amount are hardly influenced by change in a temperature and humidity environment, and pigment dispersibility is high in order to provide an image output having high transparency, color mixing properties, and color nuance stability. The present invention is a toner comprising toner particles each comprising a metallic compound and a colorant, wherein the metallic compound is a compound having a structure bonded to a metal in a site derived from —COOM | 03-14-2013 |
20130149640 | TONER PARTICLE, DEVELOPER, AND IMAGE FORMING METHOD - A toner particle including a mother particle and an outer shell layer is provided. The mother particle includes a binder resin and a colorant. The outer shell layer is formed of a reaction product of a silicon compound chemically binding to a surface of the mother particle. The outer shell layer may be formed on either the whole surface or a part of the surface of the mother particle. The reaction product of the silicon compound may be a silica compound. | 06-13-2013 |
20130244163 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, ELECTROSTATIC LATENT IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic latent image developing toner contains toner particles that contain a binder resin and a pigment; and an external additive that contains inorganic particles, a ratio (C/D) of an average maximum thickness C to an average equivalent circle diameter D in the toner particles is from 0.05 to 0.7, the inorganic particles include silicone oil-treated inorganic particles in which the amount of free silicone oil with respect to the inorganic particles is from 0.1% by weight to 10% by weight, and the amount of the silicone oil-treated inorganic particles added with respect to 100 parts by weight of the toner particles is from 0.1 part by weight to 10 parts by weight. | 09-19-2013 |
20130252161 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, DEVELOPER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent; and an external additive, wherein the external additive contains inorganic particles which include a compound represented by Formula (1) below on the surfaces thereof: | 09-26-2013 |
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 |
20140051020 | MAGNETIC IRON OXIDE PARTICLES, MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS AND PROCESS FOR PRODUCING THE SAME, AND TWO-COMPONENT SYSTEM DEVELOPER - The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which the plurality of granules are bonded. | 02-20-2014 |
20140186760 | TONER - A toner having good development durability, storage stability, environmental stability, and low-temperature fixability is provided. The toner contains toner particles each including a surface layer that contains an organic silicon polymer. The organic silicon polymer contains a unit having a specific structure. The average thickness Dav. of the surface layers is a specific value and the silicon concentration determined by ESCA is 2.5% or more. The toner has a shape factor SF-2 of 140 or more and 260 or less and an average circularity of 0.970 or more and 0.990 or less. | 07-03-2014 |
20140186761 | TONER - A toner having good development durability, storage stability, environmental stability, and low-temperature fixability is provided. The toner contains toner particles each including a surface layer that contains an organic silicon polymer. The organic silicon polymer contains a specific unit. In a chart obtained by | 07-03-2014 |
20140205942 | TONER ADDITIVES - The disclosure relates generally to toner additives, and in particular, toner additives that provide desired higher and stable toner charge. The toner additives comprise silica nanotubes in combination with or in place of the commonly used silica or titania particulate additives. | 07-24-2014 |
20140205943 | TONER - Since a charge amount of a toner and a charge rise characteristic thereof are liable to be influenced by the change in temperature and humidity condition, the change in image density occurs in printing, and in particular, in high temperature and high humidity environment, inconveniences, such as image fogging, occur due to non-uniformity of the charge amount distribution. In a toner including toner particles obtained by dispersing a monomer composition containing a polymerizable monomer and a colorant in an aqueous medium to form droplets and polymerizing the polymerizable monomer in the droplets, the toner particles contain a polymer formed by a polymerization reaction of the polymerizable monomer and a metal compound having a vinyl group. | 07-24-2014 |
20140234766 | TONER TO DEVELOP ELECTROSTATIC LATENT IMAGES | 08-21-2014 |
20140295340 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - An electrostatic charge image developing toner includes toner particles and silica particles that have a titanium content of from 0.001% by weight to 10% by weight in a surface layer, an average particle diameter of from 30 nm to 500 nm, and a particle size distribution index of from 1.1 to 1.5, and are surface-treated with a titanium compound in which an organic group is bonded to a titanium atom via an oxygen atom, and a hydrophobizing agent in sequence. | 10-02-2014 |
20140302433 | MAGNETIC TONER - A magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the magnetic toner has a coverage ratio A and a coverage ratio B/coverage ratio A in prescribed ranges, wherein the magnetic toner has a dielectric constant ∈ and a dielectric loss tangent in prescribed ranges. | 10-09-2014 |
20140308608 | Sol-Gel Silica Additives - The present disclosure describes toner additive packages comprising two or more colloidal silicas. | 10-16-2014 |
20140315125 | MAGNETIC TONER - The magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, wherein the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the coverage ratio of the magnetic toner particle surface by the inorganic fine particles resides in a prescribed range for this magnetic toner; the binder resin is a styrene resin; the weight-average molecular weight and radius of gyration of the magnetic toner reside in a prescribed relationship; and the viscosity of the magnetic toner at 110° C. resides in a prescribed range. | 10-23-2014 |
20140315126 | MAGNETIC TONER - The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein | 10-23-2014 |
20140322639 | MAGNETIC TONER - A magnetic toner contains magnetic toner particles containing a binder resin, a release agent, and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, the coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and the coverage ratio by the inorganic fine particles fixed to the magnetic toner particles' surface reside in a prescribed relationship, the binder resin contains a polyester resin, the release agent contains an ester compound, and an endothermic peak for the magnetic toner has a prescribed value. | 10-30-2014 |
20140322640 | MAGNETIC TONER - A magnetic toner containing: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain silica fine particles and alumina fine particles and/or titania fine particles; a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from 5 nm to not more than 50 nm and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from at least 5 nm to not more than 50 nm and is fixed to the magnetic toner particles' surface, have prescribed values and a prescribed relationship in the magnetic toner; and alumina fine particles and/or titania fine particles each of which has a particle diameter of from at least 100 nm to not more than 800 nm is present on the surface of the magnetic toner particles at from at least 1 particle to not more than 150 particles, as the sum of the two, per magnetic toner particle. | 10-30-2014 |
20140335449 | MAGNETIC TONER - A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the release agent contains a monoester compound or a diester compound; and the softening temperature and softening point of the magnetic toner reside in prescribed temperature ranges. | 11-13-2014 |
20140335450 | MAGNETIC TONER - A magnetic toner is provided that exhibits an excellent electrostatic offset resistance both initially and after long-term use. The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain a prescribed metal oxide fine particle in a prescribed proportion; the magnetic toner has prescribed numerical value ranges for a coverage ratio A of the magnetic toner particle surface covered by the inorganic fine particles and for a coverage ratio B by the inorganic fine particles that are fixed to the magnetic toner particle surface; the magnetic toner particle contains a crystalline polyester; and measurement of the magnetic toner with a differential scanning calorimeter provides a characteristic differential scanning calorimetric curve. | 11-13-2014 |
20140342277 | MAGNETIC TONER - The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise strontium titanate fine particles and metal oxide fine particles, and the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the magnetic toner has a characteristic state of coverage, by the inorganic fine particles, of the magnetic toner particle surface, and the ratio [D | 11-20-2014 |
20140342278 | MAGNETIC TONER - A magnetic toner includes: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles that are present on the surface of the magnetic toner particles and are not a magnetic iron oxide and magnetic iron oxide particles that are present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the coverage ratio A and B/A satisfy prescribed ranges; and the magnetic iron oxide particles present on the magnetic toner particles' surface are from at least 0.10 mass % to not more than 5.00 mass % with respect to the total amount of the magnetic toner. | 11-20-2014 |
20140342279 | POLYMER-ENCAPSULATED METALLIC INK PARTICLES AND METALLIC ELECTROPHOTOGRAPHIC INKS - A method for making polymer-encapsulated metallic ink particles is disclosed herein. An ethylene-based polymeric resin powder is formed, and is mixed with a metallic pigment powder to form a powder mixture. The powder mixture is melted to form a metallic polymer melt. A non-polar carrier is added to the metallic polymer melt to form a slurry. The slurry is processed in a microfluidizer. | 11-20-2014 |
20140349228 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER, PRODUCTION METHOD OF THE TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND ELECTROPHOTOGRAPHIC IMAGE FORMATION METHOD - A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 μm or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles. | 11-27-2014 |
20140356775 | ALUMINA NANOTUBES AS A TONER ADDITIVE TO REDUCE IMPACTION - The disclosure relates generally to toner additives, and in particular, toner additives that provide reduced impaction within a toner particle and improved adhesion to the toner particle. The toner additives include alumina nanotubes, and may be used with other non-conventional additives such as silica nanotubes and titania nanotubes. | 12-04-2014 |
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 |
20140356777 | TONER - A toner having good low-temperature fixability, charge stability, environmental stability, and durability and capable of stably producing high-quality images for a long time is provided. The toner includes a toner particle having a core-shell structure constituted of a core and a shell phase. The core contains a binder resin, a colorant, and wax, and the shell phase contains a resin A. The resin A is a comb polymer including a main chain portion (X), a side chain portion (Y), and a side chain portion (Z). The main chain portion (X) is a vinyl polymer, the side chain portion (Y) has an aliphatic polyester structure and has an ester group concentration of a polyester segment of 6.5 mmol/g or less, and the side chain portion (Z) has an organic polysiloxane structure and has an average number of Si—O bond repeating units of a siloxane segment of 2 or more and 100 or less. | 12-04-2014 |
20140370429 | Negative Charge Carrier Resins With RH Sensitivity - The instant disclosure describes methacrylate coated carrier resins with hydrophobic substituents for charge control and improved RH sensitivity. | 12-18-2014 |
20140377696 | TONER - A toner comprising toner particles which comprise a binder resin and a colorant, and also inorganic fine particles as external additives, wherein the inorganic fine particles are silica fine particles and a group 2 element titanate fine particles, the inorganic fine particles have specific particle diameters, the silica fine particles have a coverage ratio X1 on the surfaces of the toner particles, which is not less than 40.0 surface area % and not more than 75.0 surface area %, when the theoretical coverage ratio by the silica fine particles is X2, the diffusion index defined as “diffusion index=X1/X2” satisfies the condition: diffusion index≧−0.0042×X1+0.62, and the external additives have an embedding ratio on the toner particles, which satisfies a specific range. | 12-25-2014 |
20150010862 | TWO-COMPONENT DEVELOPER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND MANUFACTURING METHOD THEREOF - According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin. | 01-08-2015 |
20150024313 | ZIRCONIUM OXIDE TONER ADDITIVE - A toner composition includes toner particles and an additive disposed on an exterior surface of the toner particles, the additive includes uncoated zirconium oxide particles, the toner composition is substantially free of one or more rare earth compounds and the uncoated zirconium oxide particles are present in a sufficient amount to reduce bias charge roller contamination. | 01-22-2015 |
20150024314 | TONER ADDITIVES TO PREVENT BIAS ROLLER CONTAMINATION - A toner composition includes toner particles and additives disposed on an exterior surface of the toner particles, the additives include uncoated particles satisfying the equation: | 01-22-2015 |
20150024315 | SILICON CARBIDE TONER ADDITIVE - A toner composition includes toner particles and an additive disposed on exterior surfaces of the toner particles, the additive includes uncoated silicon carbide particles, the toner composition is substantially free of one or more rare earth compound and the uncoated silicon carbide particles are present in a sufficient amount to reduce bias charge roller contamination. | 01-22-2015 |
20150024316 | Engineering-Grade Consumable Materials for Electrophotography-Based Additive Manufacturing - A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner. | 01-22-2015 |
20150024317 | High-Performance Consumable Materials for Electrophotography-Based Additive Manufacturing - A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a high-performance thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner. | 01-22-2015 |
20150037720 | MAGNETIC TONER - Provided is magnetic toner capable of favorably maintain fluidity of the magnetic toner in a developing unit even after a large number of image formation. The magnetic toner to which an external additive that has 1) a number average particle diameter of 70 or more and 200 or less, 2) a shape factor SF-1 of 100 or more and 250 or less, and 3) a shape factor SF-2 of 105 or more and 250 or less, is added, and a covering rate by silica on the surfaces of toner particles is 40.0% or more and 70.0% or less, and the magnetic toner has specific fluidity. | 02-05-2015 |
20150037721 | TONER - Provided is a toner that has excellent low-temperature fixability and is capable of obtaining an image having a stable image density, in which the occurrence of image defects is suppressed. The toner includes toner base particles, each of which contains a binder resin and a magnetic material, and organic-inorganic composite fine particles on each of the toner base particles. Each of the organic-inorganic composite fine particles comprises a vinyl resin particle, and inorganic fine particles which are embedded in the vinyl resin particle, and at least a part of which are exposed. The volumetric specific heat of the organic-inorganic composite fine particles and the volumetric specific heat of the toner base particles satisfy a predetermined provision. | 02-05-2015 |
20150079512 | Treated Fumed Silica - Disclosed herein are treated fumed silica particles comprising a modified polydialkylsiloxane on the surface thereof, a method for preparing treated fumed silica particles, and a rheological system comprising a polar liquid and treated fumed silica particles. Also disclosed are toner compositions comprising toner particles and treated fumed silica particles comprising a modified polydialkylsiloxane. | 03-19-2015 |
20150099220 | TONER - The present invention provides a toner having a toner particle that contains a binder resin and an organic silicon polymer, wherein the organic silicon polymer has a specific structure, the proportion of the specific structure to the number of a silicon atom in the organic silicon polymer contained in the toner particle is at least 5.0%, the toner particle contain a polyester resin of from at least 1.0% by mass to less than 80% by mass, and the polyester resin is a specific polymer. | 04-09-2015 |
20150118610 | HYBRID EMULSION AGGREGATE TONER - Toners and processes useful in providing toners suitable for electrophotographic apparatuses, including apparatuses such as digital, image-on-image, and similar apparatuses. In particular, emulsion aggregate toner compositions that use two different emulsion aggregation (EA) technologies and which comprise a base resin composed of both styrene-acrylate and polyester resins. These toner compositions further include polyaluminum chloride (PAC) instead of the more commonly used aluminum sulfate as the flocculant or aggregating agent. | 04-30-2015 |
20150125790 | MAGNETIC TONER - A magnetic toner having a toner particle containing a binder resin and a magnetic member, a first inorganic fine particle and an organic-inorganic composite particle on the surface of the toner particle, wherein
| 05-07-2015 |
20150309433 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER - An electrostatic charge image developing toner includes: toner matrix particles containing a binder resin; and an external additive added to the toner matrix particles, wherein the external additive includes joined particles each including a secondary particle including a plurality of spherical primary particles joined together, the joined particles include at least particles with a secondary particle size d2 in the range of 70 nm to 400 nm, and particles with a ratio d2/d1 in the range of 1.6 to 4.2 make up at least 50% by number of the particles with a secondary particle size d2 in the range of 70 nm to 400 nm, wherein d1 is the diameter of primary particles in the joined particle, and d2 is the secondary particle size. | 10-29-2015 |
20160124332 | TONER, DEVELOPER AND METHOD OF MANUFACTURING TONER - A toner is provided. The toner includes a binder resin, a colorant, a release agent and an external additive. The toner has an average circularity of from 0.965 to less than 0.985. The toner has BET specific surface area of less than 1.20 m | 05-05-2016 |