| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 430108600 | Metal oxide conmpound adjuvant (e.g., AI2O3'TiO2'etc.) | 61 |
| 20080233505 | TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE TONER - A toner, including a parent particulate material including a colorant and a binder resin, and an external additive including particles having an average primary particle diameter from 80 to less than 150 nm in an amount of from 0.03 to 2% by number, particles having an average primary particle diameter from 5 nm to less than 15 nm in an amount of from 50 to 95% by number, and particles having an average primary particle diameter from 15 to less than 40 nm in an amount of from 5 to 40% by number, and the particles having an average primary particle diameter from 80 to less than 150 nm include particles having an average primary particle diameter not less than 200 nm in an amount of from 10 to 30% by number, and have a weight reduction rate not greater than 3.00% when heated from 30 to 250° C. | 09-25-2008 |
| 20080241725 | TONER FOR DEVELOPING AGENT AND METHOD FOR PRODUCING THE SAME - In order to solve the foregoing inconveniences, specified addition amounts of a low-resistance external additive and a high-resistance external additive are used in this invention. Furthermore, the toner having been subjected to external addition is subjected to cyclone classification to separate the external additives by force, thereby producing a toner in the same state as in the toner to which a mechanical stress has been applied within the developing unit. When a value of resistance of the toner after externally adding the external additives and a value of resistance of the toner after cyclone classification and a relationship between the both are specified as described later, so far as they fall within the specified ranges, it is possible to provide a developing agent which is free from deterioration of the image quality and is less in toner scattering even by an environmental change or after long-term use. | 10-02-2008 |
| 20080261138 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER - An objective is to provide an electrostatic latent image developing toner exhibiting ultra-low temperature fixability together with high resolution, excellent fluidity and anti-blocking property, and excellent aging stability in a toner vessel, in which the toner is supplied into an image forming apparatus. Also disclosed is an electrostatic latent image developing toner stored in a vessel possessing an ejecting outlet, capable of fitting into an image forming apparatus, wherein the vessel has a cross-sectional area of the outlet of 0.07-2.00 cm | 10-23-2008 |
| 20080292983 | Magnetic One-Component Toner for Development of Electrostatic Latent Image and Image Forming Method - Disclosed is a magnetic one-component toner for development of an electrostatic latent image used in a magnetic one-component jumping development system in which a photoconductor is an a-Si photoconductor having a thickness of 30 μm or less and Rz of a developer carrier is from 2.0 to 6.0 μm. A cleaning means for removing the toner from the surface of the photoconductor is a cleaning blade. Titanium oxide, as an external additive, is added to the toner. The titanium oxide has a liberation rate within a range from 10 to 22% and contains a low resistance titanium oxide having a volume resistivity within a range from 10 | 11-27-2008 |
| 20090092918 | Grafting Metal Oxides Onto Polymer for Toner - Toner particles, including at least one binder, at least one colorant, and at least one metal surface additive, wherein the at least one metal oxide surface additive is a metal oxide particle covalently bonded with at least one polycondensation polymer. | 04-09-2009 |
| 20090111042 | ELECTROSTATIC CHARGE IMAGE DEVELOPER, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - An electrostatic charge image developer includes a toner containing an external additive and a carrier comprising a resin-coated layer formed on a surface of a core material. The average shape factor SF1 of the toner is from 125 to 135, the number of particles having shape factor SF1 of less than 125 is from 5% to 30% by number with respect to the total number of toner particles, the number of particles having shape factor SF1 of greater than 135 is from 5% to 30% by number with respect to the total number of toner particles, the scratch line width in a scratch strength test of the resin used in the resin-coated layer is from 80 μm to 200 μm, and the scratch depth is from 60 μm to 150 μm. | 04-30-2009 |
| 20090130584 | DEVELOPING AGENT, IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - A developing agent includes a carrier; a toner in which an inorganic oxide external additive has a coverage of from 60 to 120% relative to a core toner; and a charging auxiliary particle having charge properties of a positive electrode and having a volume average particle size of from 5 to 15 μm in an addition amount of from 0.5 to 6% by weight relative to the developing agent. | 05-21-2009 |
| 20090142684 | Toner - Disclosed is a toner which can be charged at a designated level even when a lot of print is carried out with severity of charging by stirring and when the printing is carried out under the low temperature-low humidity or the high temperature-high humidity condition. A toner comprising (a) a particle comprising a resin and a colorant; and (b) a titanate compound on the surface of the particle, in which the titanate compound contains iron in an amount of from 100 ppm to 1,000 ppm. | 06-04-2009 |
| 20090142685 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND TONER FOR IMAGE FORMING APPARATUS - An image forming method including charging an image bearing member by applying combination of DC voltage and AC voltage with frequency of 6.5 to 8.5 cycle/mm; irradiating the image bearing member with light to form an electrostatic image; developing the electrostatic image with a developer including toner to form a toner image; transferring the toner image onto a receiving material; fixing the toner image; cleaning the image bearing member with a blade; then applying a lubricant to the image bearing member; and then spreading the lubricant with a spreading member countering the image bearing member. The toner includes toner particles granulated in an aqueous medium; and at least three kinds of external additives including a first particulate hydrophobic silica, a particulate hydrophobic titanium oxide and a second particulate hydrophobic silica respectively having BET specific surface areas of 20 to 40 m | 06-04-2009 |
| 20090220880 | GRAFTING FUNCTIONALIZED PEARLESCENT OR METALLIC PIGMENT ONTO POLYESTER POLYMERS FOR SPECIAL EFFECT IMAGES - Pigment particles with at least one metal oxide surface additive, wherein the at least one metal oxide surface additive is a metal oxide particle covalently bonded with at least one polycondensation polymer, wherein the pigment particle is a pearlescent or metallic pigment. | 09-03-2009 |
| 20090233205 | TWO-COMPONENT DEVELOPER - Provided is a two-component developer with which degradation of development is inhibited even in the case of prolonged use, and thereby a high quality image exhibiting high resolution and sufficient image density can be formed for a long duration. Also disclosed is a two-component developer possessing a carrier and a toner, wherein the carrier in which magnetic material powder is dispersed in a binder resin containing a phenol formaldehyde resin has a shape coefficient SF-1 of 1.0-1.2, a shape coefficient SF-2 of 1.1-2.5 and a volume-based median particle diameter of 10-100 μm, and the toner possesses a colored particle and an external additive particle, wherein the external additive particle comprises a titanic acid compound and iron, and the iron content is 100-1,000 ppm, based on the titanic acid compound. | 09-17-2009 |
| 20090246670 | CARRIER PARTICLES FOR FORMING WIRING CIRCUIT PATTERN AND DEVELOPER - Carrier particles for forming a wiring circuit pattern by an electrophotographic developing method which are used for directly forming a circuit shape on an insulating layer, with any of a metal powder, an inorganic compound powder, or a mixed raw material powder thereof used as a toner powder for forming a circuit, the toner powder for forming a circuit being adhered to a surface of the carrier particles by electrostatic force and then transported to a surface of the insulating layer, wherein the carrier particles include a resin coated layer of an acrylic resin composition containing an amino-group-containing polymer on the surface of the carrier core material particles, the coating amount of the acrylic resin composition is 0.3 to 3.0% by weight based on a carrier core material weight of 100% by weight, and a shape factor SF-1 of the carrier core material particles is 100 to 110. | 10-01-2009 |
| 20100040968 | Toner Compositions Including Silica Blends - A toner composition and method of providing such composition which may be used in a printer or printer cartridge. The composition may include toner particles mixed with silica particles having a primary particle size in the range of 30 nm to 60 nm present in the range of 0.1 to 2.0% by weight of the toner composition and silica particles having a primary particle size in the range of 60 nm to 150 nm present in the range of 0.1 to 2% by weight of the toner composition. | 02-18-2010 |
| 20100075242 | TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT - A toner for electrostatic image development containing (a) a toner matrix particle containing a resin binder, and (b) an external additive added to the toner matrix particles, wherein the resin binder contains a polyester A obtained by polycondensing an alcohol component and a carboxylic acid component containing isophthalic acid and/or an ester thereof, and wherein the external additive contains fine silica particles containing a metal or a metal oxide; and A method of forming fixed images including the step of applying the toner for electrostatic image development to an image-forming apparatus according to a non-contact fusing method. The toner for electrostatic image development of the present invention is suitably used in developing latent images formed in, for example, electrophotography, an electrostatic recording method, an electrostatic printing method, or the like. | 03-25-2010 |
| 20100159377 | TONER SURFACE TREATMENT - The present invention is directed to surface treatment of toner particles and the toner developers used for the dry development of electrostatic charge images. | 06-24-2010 |
| 20100159378 | Toner having Improved Charge Characteristics - This invention provides a toner with improved charge and charge stability by suitable addition of extra particulate additives (EPA) such as aluminum cerium oxide and/or cerium zirconium oxide. The additives may be combined with toner in a conical mixer having selected temperature control. The invention also provides toner which may provide reduced print quality defects such as ghosting or residual image and fade-to-color. | 06-24-2010 |
| 20100196815 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER - Electrostatic charge image developing toner Electrostatic charge image developing toner containing external additives comprising pyrogenically prepared surface modified silicon-dioxide-titanium mixed oxides. | 08-05-2010 |
| 20100203439 | TONER COMPOSITIONS AND PROCESSES - Environmentally friendly toner particles are provided which may, in embodiments, include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Toner particles may, in embodiments, have a core-shell configuration, with the shell formed of the bio-based amorphous polyester resin, the amorphous polyester resin, the crystalline polyester resin, or combinations thereof. | 08-12-2010 |
| 20100233607 | Toner for Developing Electrostatic Images and Process for Producing the Toner - A toner for developing electrostatic images which is obtained by melt mixing at least a binder resin and a coloring agent, forming a powder material by pulverizing the obtained mixture after cooling and removing rough particles and fine particles from the formed powder material by classification, wherein inorganic fine particles having a roundness of 1.00 to 1.30, an average of the diameter of primary particles of 0.05 to 0.45 μm and a ratio of a standard deviation to the average of the diameter of primary particles of 0.25 or smaller are added as an external additive, and a process for producing a toner for developing electrostatic images which comprises melt mixing at least a binder resin and a coloring agent, forming a powder material by pulverizing the obtained mixture after cooling, rounding the powder material by a heat treatment and adding the above inorganic fine particles to the rounded powder material. By using the toner, printed images of a high quality can be formed with an excellent transfer rate, suppressed contamination of the charge roller, minimal background and small consumption of the toner. | 09-16-2010 |
| 20100233608 | ELECTROSTATIC IMAGE DEVELOPING CARRIER, PROCESS OF MAKING THE SAME, ELECTROSTATIC IMAGE DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - An electrostatic image developing carrier includes a ferrite particle that contains from about 1.0% by weight to about 14.0% by weight of elemental magnesium, wherein an average distribution ratio D of the elemental magnesium in the ferrite particle is from about 1.1 to about 2.0, wherein the average distribution ratio D is defined as an average value of D′ of at least 50 ferrite particles, wherein D′ is defined as W1/W2, wherein W1 is a weight ratio of elemental magnesium content Mg to elemental iron content Fe, Me/Fe, in a whole cross-section of the ferrite particle, and W2 is a weight ratio of elemental magnesium content Mg to elemental iron content Fe, Me/Fe, in a square, the two opposite vertices of which are located at two points on a diameter of a circle circumscribing the cross-section, each being half a radius distant from the center of the circumscribing circle. | 09-16-2010 |
| 20100239971 | TONER FOR ELECTROPHOTOGRAPHY AND PROCESS FOR PRODUCING THE SAME - A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m | 09-23-2010 |
| 20100304288 | ELECTROPHOGRAPHIC TONER - A toner comprising toner particles, wherein a surface-treated titanate compound is contained on the surface of parent toner particles comprising a resin and a colorant, and the titanate compound having a carbon amount of not less than 0.15% by mass and not more than 0.50% by mass. | 12-02-2010 |
| 20100330490 | POSITIVELY-CHARGEABLE TONER FOR DEVELOPING ELECTROSTATIC IMAGE - A positively-chargeable toner for developing electrostatic images which can prevent damage of photosensitive members and filming due to an external additive, can impart a stable charge property and flowability to toner particles over time, and thus hardly causes deterioration of image quality due to fog, blur, white streaks or the like, and therefore is excellent in printing durability even if continuous printing of plural prints is performed is provided. A positively-chargeable toner for developing electrostatic images of the present invention is a positively-chargeable toner for developing electrostatic images comprising colored resin particles containing a colorant and a binder resin, and an external additive, wherein the external additive contains magnesium silicate having negatively charging ability, with a Mohs hardness of 3 or less and a number average primary particle diameter in the range from 1 to 15 μm. | 12-30-2010 |
| 20110008722 | TONER COMPOSITIONS - Toners are provided which include a resin including at least one baroplastic polymer. The baroplastic polymer, in embodiments, may be a block copolymer with discrete low glass transition temperature (Tg) domains and high Tg domains that plasticize one another at ambient temperature when subjected to pressures of from about 500 psi (about 3.45 MPa) to about 10,000 psi (about 69 MPa), enabling them to be extruded and molded without heat. The resulting polymers, in turn, may then be utilized to form toners. | 01-13-2011 |
| 20110117485 | TONER COMPOSITION, DEVELOPER COMPRISING THE TONER COMPOSITION, AND METHOD IN CONNECTION WITH THE PRODUCTION OF A VOLUME BODY - The present invention relates to a toner composition for forming a masking pattern for use e.g. in connection with a method of building up a three-dimensional body from a large number of mutually connected layers of powder particles that are bonded to each other using radiant heat. The toner composition consists of powder particles that arc able to withstand a temperature of at least 200° C. without sticking together. It also relates to a developer that comprises the toner composition and carrier particles and a method in connection with the production of a volume body by using a toner composition or a developer according to the invention. | 05-19-2011 |
| 20110129772 | POROUS FERRITE CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, RESIN-FILLED FERRITE CARRIER AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE FERRITE CARRIER - A porous ferrite core material for an electrophotographic developer, the porous ferrite core material including Mg in a content of 0.3 to 3% by weight, Ti in a content of 0.4 to 3% by weight and Fe in a content of 60 to 70% by weight, and the porous ferrite core material having a pore volume of 0.04 to 0.16 ml/g, a peak pore size of 0.4 to 1.6 μm, a saturation magnetization of 40 to 80 Am | 06-02-2011 |
| 20110136054 | TONER - A toner having toner base particles each of which contains at least a binder resin and a colorant, and silica titania composite particles. The silica titania composite particles contain silica in an amount of from 55.0% by mass to 85.0% by mass; and, in a chart obtained by the measurement by Xray diffraction of the silica titania composite particles and where, in respect of a peak having the highest diffraction intensity and a peak having the next-highest diffraction intensity among peaks present in the range of 2θ=24.0 to 29.0, the value of area of the peak on the lower-angle side is represented by Xa and the value of area of the peak on the higher-angle side is represented by Xb, the ratio of Xa/Xb is from 95/5 to 75/25. | 06-09-2011 |
| 20110159426 | SILICA-TITANIA MIXED OXIDE PARTICLE - As for a pyrogenically produced silica-titania mixed oxide particle, titanium content is 50 wt % or more, a BET specific surface area is 100 m | 06-30-2011 |
| 20110159427 | ELECTROPHOTOGRAPHIC TONER AND METHOD OF PREPARING THE SAME - The disclosure provides an electrophotographic toner and methods for preparing the electrographic toner. The electrographic toner includes a binder, a colorant and a releasing agent, wherein the electrophotographic toner includes strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein, if [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, then the [Sr]/[Fe] ratio is in the range of about 5.0×10 | 06-30-2011 |
| 20110189605 | Making Method for Titania Nanoparticle - The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles. | 08-04-2011 |
| 20110212397 | ELECTROPHOTOGRAPHIC TONER - An electrophotographic toner, which is decolorized by heating and a glossiness after decolorization of which is less than 10, comprising an electron donating color former compound, an electron accepting color developing agent, and a polyester binder resin. | 09-01-2011 |
| 20110262854 | ELECTROPHOTOGRAPHIC TONER - Disclosed is a toner having a controlled micro/semimacro roughness ratio, such that the toner surface has a ratio of {an average of an arithmetic average height (Ra) in a 0.5 μm-square region} to {an average of an arithmetic average height (Ra) in a 1 μm-square region} of 0.5 or more. As a result, the toner is provided with improved electrophotographic performances, including low environmental variation, less toner scattering, and improved image quality. | 10-27-2011 |
| 20110287355 | ELECTROPHOTOGRAPHIC TONER - Disclosed is an electrophotographic toner, including toner particles which contain at least a binder resin and a coloring agent and have been prepared in an aqueous medium, wherein the surfaces of the toner particles are treated with an Si compound in an amount of from 0.1 to 5.0 wt % calculated as SiO | 11-24-2011 |
| 20110294057 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND IMAGE FORMING APPARATUS - The present disclosure aims to provide a toner that is capable of keeping a photoreceptor drum in satisfactory condition for a long period of time and preventing the occurrence of pinholes on the photoreceptor drum, which plays a key role in forming images. The present disclosure provides an electrostatic charge image developing toner in which an external additive is added to toner base particles, wherein the external additive includes inorganic fine particles attached with conductive fine particles, and the conductive fine particles are attached to the inorganic fine particles with certain strength. | 12-01-2011 |
| 20120009515 | DEVELOPER FOR ELECTROPHOTOGRAPHY - The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements. | 01-12-2012 |
| 20120028181 | SURFACE DECORATED PARTICLES - A surface decorated particle including a core particle phase having an outer surface; and fine inorganic particles on the outer surface of the core particle phase; wherein the fine inorganic particles have hydrophobic groups covalently bonded primarily on portions of surfaces of the fine inorganic particles positioned away from the core particle phase. Such surface decorated particles are obtainable by a method including stabilizing dispersed hydrophobic phase particles in an aqueous phase with fine inorganic particles having a relatively hydrophilic surface; and treating the stabilized dispersed hydrophobic phase particles with a hydrophobic group containing reactant to form hydrophobic groups covalently bonded to surfaces of the fine inorganic particles. In a particular embodiment, such surface decorated particles are obtainable by a limited coalescence process for preparing binder polymer particles using inorganic stabilizer particles that provide a plurality of surface bonding sites and reacting such sites with a plurality of alkoxy silane moieties that contains pendant hydrophobic groups. | 02-02-2012 |
| 20120100477 | LARGE PARTICLE TONER - Toners are provided. In one aspect a toner comprises, particles of at least one toner resin having particle diameters greater than about 20 microns, a first particulate addenda on the toner particles having a BET surface area of less than 60 m2/g of the toner particle; and a second particulate addenda on the toner particles having a BET surface of more than 120 m2/g. | 04-26-2012 |
| 20120129090 | HEAT ABSORBING ADDITIVES - The invention relates to a powder composition comprising particles of a) an alkali metal tungsten bronze, b) tungsten oxide, and c) tungsten metal, a method for the preparation of said powder composition, and to the use of said powder composition in form of a dispersion in a polymer material or article for heat shielding, or to increase the heat-input amount of near infrared radiation in processes selected from laser welding of plastics, NIR curing of coatings, drying of printing inks, fixing of ink toners to a substrate, heating of plastic performs, laser marking of plastics or paper. | 05-24-2012 |
| 20120237866 | Making Method For Titania Nanoparticle - The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles. | 09-20-2012 |
| 20120301819 | TONER HAVING EXCELLENT BLOCKING RESISTANCE AND FLOWABILITY, AND METHOD FOR PRODUCING SAME - Provided is a toner having excellent blocking resistance and flowability. The toner comprises a binder resin, a releasing agent, a colorant and an external additive, wherein the toner particles satisfy expression (1): | 11-29-2012 |
| 20120308924 | PROCESS FOR ADHERING SURFACE TREATMENT TO TONER - A process for adhering surface treatment to toner resin core particles includes: providing resin core particles including a binder polymer having a Tg and having outer surfaces; providing surface treatment including at least first metal oxide particles having an average particle size of greater than 25 nm and a surface energy of less than or equal to 28 erg/cm | 12-06-2012 |
| 20130101933 | ELECTROSTATIC LATENT IMAGE-DEVELOPING TONER AND METHOD FOR FORMING IMAGE - An image is formed with an electrostatic latent image-developing toner that includes toner base particles and titanium oxide serving as an external additive. The toner base particles containing a binder resin, a colorant, and a charge control agent. The titanium oxide is attached to surfaces of the toner base particles and containing titanium oxide A and titanium oxide B. Each of the titanium oxide A and the titanium oxide B has a predetermined particle diameter and a predetermined volume resistivity. The liberation rate of each of the titanium oxide A and the titanium oxide B in the toner is within a predetermined range. | 04-25-2013 |
| 20130157189 | Toners Containing Large Strontium Titanate Particles - Disclosed is a toner composition comprising: (a) resin particles; and (b) strontium titanate particles having an average particle diameter of at least about 400 nm. | 06-20-2013 |
| 20130171553 | CHEMICALLY PREPARED TONER FORMULATION INCLUDING A BORAX COUPLING AGENT - A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a second polymer binder; and a borax coupling agent between the core and the shell. | 07-04-2013 |
| 20130224643 | TRANSPARENT ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND METHOD OF MANUFACTURING THE SAME, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - A transparent electrostatic charge image developing toner contains a binder resin, europium, and bismuth. | 08-29-2013 |
| 20130236824 | TONER TO DEVELOP ELECTROSTATIC LATENT IMAGES - A toner to develop electrostatic latent images, which has surface characteristics that may simultaneously improve charge uniformity, charge stability, transferability, and cleaning ability. The toner to develop electrostatic latent images may include core particles comprising a binder resin, a colorant, and a releasing agent; and an external additive including silica particles and titanium dioxide particles, wherein the external additive is attached to external surfaces of the core particles, wherein an iron intensity [Fe], a silicon intensity [Si], and a titanium intensity [Ti] that are measured by X-ray fluorescence (XRF) satisfy both conditions, 0.004≦[Si]/[Fe]≦0.009 and 0.8≦[Ti]/[Fe]≦2. | 09-12-2013 |
| 20140017607 | 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 composite particles that contain silicon oxide and from 0.001% by weight to 10% by weight of titanium, and have an average particle size of from 30 nm to 500 nm, a particle size distribution index of from 1.10 to 1.50, and an average circularity of from 0.50 to 0.85. | 01-16-2014 |
| 20140272697 | TONER COMPOSITION HAVING IMPROVED CHARGE CHARACTERISTICS AND ADDITIVE ATTACHMENT - A method of making a toner composition includes preparing raw toner particles, increasing a surface area of the raw toner particles by contacting the raw toner particles with a base to produce base-treated raw toner particles, and mixing the base-treated raw toner particles with at least one surface additive such that the at least one surface additive attaches to a surface of the base-treated raw toner particles to obtain blended toner particles. A toner composition includes blended toner particles containing base-treated raw toner particles, and at least one surface additive attached to a surface of the base-treated raw toner particles, wherein a ratio of a triboelectric charge of the blended toner composition to a triboelectric charge of the base-treated raw toner particles is from about 0.8 to about 1.2. | 09-18-2014 |
| 20140349229 | TONER COMPOSITION - A toner composition includes a resin, optionally a wax, a colorant, and an acicular surface additive. The toner composition is suitable for use in a single component development system and which composition possesses excellent charging, stability, and flow characteristics. | 11-27-2014 |
| 20140370431 | 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 a ratio of coverage of the magnetic toner particles' surface by the inorganic fine particles is in a prescribed range for the magnetic toner, the inorganic fine particles contain prescribed metal oxide fine particles, with at least 85 mass % of the metal oxide fine particles being silica fine particles, the coefficient of variation on the coverage ratio A is in a prescribed range, the binder resin contains a styrene resin, in a GPC measurement of a THF-soluble matter in the magnetic toner, a peak molecular weight (Mp) of a main peak is in a prescribed range, and a prescribed fatty acid ester compound is incorporated as a release agent. | 12-18-2014 |
| 20150024318 | BARIUM TITANATE TONER ADDITIVE - A toner composition includes toner particles and an additive disposed on an exterior surface of the toner particles, the additive includes uncoated barium titanate particles, the toner composition is substantially free of one or more rare earth compounds and the uncoated barium titanate particles are present in a sufficient amount to reduce bias charge roller contamination. | 01-22-2015 |
| 20150037723 | TONER - A toner excellent in end-portion hot offset properties is provided. A toner including toner particles and an external additive, wherein the toner particles contain a binder resin, and organic-inorganic composite fine particles dispersed in the binder resin, and the organic-inorganic composite fine particles (1) have a number-average particle diameter of 70 nm or more and 500 nm or less, (2) have a structure in which inorganic fine particles are embedded in a resin particle, convexes derived from the inorganic fine particles being present on surfaces of the organic-inorganic composite fine particles, (3) have a shape factor SF-2 of 103 or more and 120 or less, and (4) contain a resin component in which a proportion of THF-insoluble matter based on a mass of the resin component is 95% by mass or more. | 02-05-2015 |
| 20150072283 | Colored Toners - The disclosure describes a pigment of certain surface area for use in toner. | 03-12-2015 |
| 20150111142 | NON-POROUS DRY TONER PARTICLES FOR METALLIC PRINTED EFFECT - A nonporous dry toner particle has a polymeric binder phase and non-conductive metal oxide particles dispersed therein. The nonporous dry toner particle has a mean volume weighted diameter (Dvoi) before fixing of at least 15 μηι to 40 μηι. The non-conductive metal oxide particles have as aspect ratio of at least 5 and an ECD of at least 2 μηι. They are present in an amount of at least 15 to 50 weight % based on total nonporous dry toner particle weight. The ratio of the nonporous dry toner particle Dvoi to the ECD of the non-conductive metal oxide particles in the nonporous dry toner particles, before fixing, is greater than 0.1 and up to and including 10. These nonporous dry toner particles can be included in dry one-component or two-component developers and used to form electrophotographic printed toner images exhibiting special effects such as a metallic effect. | 04-23-2015 |
| 20150118611 | TONER TO DEVELOP ELECTROSTATIC LATENT IMAGES - A toner to develop electrostatic latent images which uses an appropriate combination of a high molecular weight binder resin and a low molecular weight binder resin, an appropriate amount of a releasing agent, and a combination of silica particles and iron oxide particles as external additives, and thus has the following effects: the toner may reduce a generation amount of ultra-fine particles (UFPs) and have enhanced fluidity, charging uniformity, charging stability, transfer efficiency, fixability, durability and a cleaning ability. | 04-30-2015 |
| 20160004177 | ELECTROSTATIC IMAGE DEVELOPER - Disclosed is an electrostatic image developer containing colored resin particles containing a binder resin and a colorant, and an external additive, wherein, as the external additive, the electrostatic image developer contains plate-shaped zinc oxide fine particles having an average longer length of 50 to 2,000 nm and a value S of 0.0001 to 0.03 nm | 01-07-2016 |
| 20160026104 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrostatic charge image developing toner includes toner particles containing crosslinked resin particles having a glass transition temperature of 55° C. or higher in a surface layer of the toner particle, and silica particles having a volume average particle diameter of 30 nm to 300 nm and a coverage with respect to the toner particle from 50% to 100%. | 01-28-2016 |
| 20160041482 | TONER AND IMAGING METHOD - A toner having compatibility between transfer properties and cleaning properties is provided. A toner wherein a fine particle A containing a primary particle having a number average particle diameter (D1) of 80 nm or more and 400 nm or less is present on the surface of a toner particle at a coverage ratio of 5 to 40%, a fixing rate of 30 to 90% by mass, and a variation coefficient of 0.1 to 0.5 in a region of 0.5 πμm | 02-11-2016 |
| 20160041484 | MAGNETIC TONER - Provided is a toner having good endurance stability and good low-temperature fixability in high-speed printing, and having good resistance to the adhesion of printed paper. The toner is a magnetic toner having, on the surface of toner particle containing a binder resin and an ester compound as a releasing agent, inorganic fine particle “a” and organic-inorganic composite fine particle having a volumetric specific heat of from 2,900 kJ/(m | 02-11-2016 |
| 20160091814 | COLORLESS ULTRAVIOLET SECURITY TONER - In accordance with various embodiments of the invention, a method of forming an ultraviolet security toner for use in printing hardware originally designed to use chemically prepared toner includes melt-blending binder resin particles and optionally a charge-control agent, a colorant and a releasing agent. The fluorescent pigment is then admixed to the melt-blended particles to form a fluorescent pre-toner. A first inorganic material is then blended with the fluorescent pre-toner, coating the particles of the fluorescent pre-toner with the first inorganic material. A second inorganic material is then blended with the coated pre-toner, adding another layer of coating to the fluorescent pre-toner. The first inorganic material has an average particle diameter size that is less than the average particle diameter size of the fluorescent pigment particles and the second inorganic material has an average particle diameter size less than that of the first inorganic material. | 03-31-2016 |
| 20160154333 | Chemically Prepared Core Shell Toner Formulation Including a Borax Coupling Agent and a Plasticizing Agent in the Core | 06-02-2016 |
