Class / Patent application number | Description | Number of patent applications / Date published |
430108700 | Inorganic silicon compound adjuvant | 43 |
20080261139 | Electrophotographic Toner - The invention relates to an electrophotographic toner comprising toner particles ( | 10-23-2008 |
20080286677 | Toner for developer - Disclosed is a toner for a developer comprising cylindrical toner particles formed of a toner composition containing at least a binder resin and a releasant as toner components, and an external additive, wherein the cylindrical toner particles have an average circularity of 0.880 or more and 0.930 or less. | 11-20-2008 |
20090035683 | TONER, TWO-COMPONENT DEVELOPER AND IMAGE FORMATION DEVICE - A toner comprising a small-particle diameter external additive having a number average particle diameter of 7 to 20 nm, a large-particle diameter external additive having a number average particle diameter of 40 to 80 nm and a toner particle having a volume average particle diameter of 4 to 7 μm, wherein the large-particle diameter external additive is stuck to the surface of the toner particles in a semi-embedded state and has a rate of liberation of 0.1% by weight or less from the surface of the toner particle. | 02-05-2009 |
20090042121 | TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A toner capable of ensuring cleanness and the amount of specific charge for extended periods of time and having excellent charge stability and fixing property, a two-component developer, a developing device and an image forming apparatus are provided. A toner includes toner particles containing at least a binding resin and a coloring agent, and fine silicon-containing oxide particles having an average primary particle size of not smaller than 70 nm but not larger than 150 nm and containing water in an amount of not larger than 2.0% by weight, the fine silicon-containing oxide particles being externally added to the toner particles. | 02-12-2009 |
20090081573 | TONER FOR DEVELOPMENT OF ELECTROSTATIC IMAGE, METHOD FOR MANUFACTURING THE SAME, DEVELOPER FOR DEVELOPMENT OF ELECTROSTATIC IMAGE, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A toner for development of an electrostatic image includes at least a crystalline polyester resin and a colorant. The toner shows a dielectric loss index ∈″ of 0.1 or less at 0.1 Hz and 500 V at 30° C. and 90% RH. | 03-26-2009 |
20090117481 | TONER FOR ONE-COMPONENT DEVELOPER - A toner for one-component developer, including a mother toner including a binder resin including a polyester resin as a main component, a colorant and a release agent; and an external additive in an amount of from 2.5 to 5.0 parts by weight per 100 parts by weight of the mother toner, wherein the toner includes a hexane-extracted volume of from 10 to 40 mg/g and has a cohesion of from 50 to 90%. | 05-07-2009 |
20090142686 | IMAGE FORMING METHOD, TONER AND IMAGE FORMING APPARATUS - To provide an image forming method including conveying a toner by means of a toner supply device that supplies the toner from inside a toner housing container into a developer housing section of a developing device with the use of a screw pump, and forming an image on a recording medium by developing a latent image on a latent image bearing member to form a toner image with the use of a developer and by transferring the toner image to the recording medium by means of a transfer device, wherein the toner is formed by adding small particle size silica to toner base particles, and wherein when A represents the average degree of circularity of the toner, and B, expressed as percent by mass, represents the amount of the small particle size silica relative to the mass of the toner base particles, the expression −18A+17.92≦B≦−34A+33.96 is satisfied. | 06-04-2009 |
20090208862 | TWO COMPONENT DEVELOPER AND IMAGE FORMING METHOD - Provided is a method for forming an image containing the steps of: (a) forming an electrostatic latent image on an electrostatic latent image carrier; and (b) developing the electrostatic latent image by a two component developer comprising a toner and a carrier, wherein the two component developer is continually replenished in the developing step. (b); and 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 | 08-20-2009 |
20100009277 | HYDROPHOBIC INORGANIC FINE PARTICLES AND TONER - Hydrophobic inorganic fine particles are provided which: does not cause melt adhesion of toner to a photosensitive member and contamination of a contact charging member; imparts excellent flowability, charging performance and durability to toner even after the toner is stored in a high-temperature, high-humidity environment over a long time period; and does not cause dripping of toner and contamination with the toner. The hydrophobic inorganic fine particles are obtained by subjecting inorganic fine particles to surface treatment with silicone oil and then with a silane compound and/or a silazane compound, or by subjecting inorganic fine particles to surface treatment with a silane compound and/or a silazane compound in the presence of silicone oil, and further subjecting the inorganic fine particles thus surface-treated to surface treatment with silicone oil. | 01-14-2010 |
20100009278 | TONER AND IMAGE FORMING METHOD - A toner is provided which has toner particles and a fine silica powder mixed by external addition to the toner particles. The toner has a weight average particle diameter of 4.0 to 9.0 μm. The fine silica powder is subjected to hydrophobic treatment with dimethylsilicone oil, and has, in particle size distribution based on volume, a peak at which cumulative frequency is largest, in the measurement range of 0.02 μm to 1,000.00 μm; the cumulative frequency of 0.10 μm to less than 1.00 μm being 7.0% or less, and, the fine silica powder fulfills the following conditions:
| 01-14-2010 |
20100062356 | TONER FOR ELECTROSTATIC DEVELOPMENT, IMAGE FORMING APPRATUS, AND IMAGE FORMING METHOD - An embodiment of toner for electrostatic development may include toner base particles, and resin fine particles. Further, some embodiments may include external additives, such as hydrophobic silica. In some embodiments, the resin fine particles may include a polymer having an isobornyl group-containing acrylate monomer. | 03-11-2010 |
20100151376 | TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND METHOD OF PREPARING THE TONER - Disclosed are a toner for developing an electrostatic latent image and a method of preparing the toner. The toner may include a latex, a colorant and a releasing agent, and may further include sulfur (S), iron (Fe) and silicon (Si). The [S]/[Fe] ratio may be within the range between about 5.0×10 | 06-17-2010 |
20100159379 | TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND METHOD OF PREPARING THE SAME - Disclosed are a toner for developing an electrostatic latent image and a method of preparing the same. The toner may include latex, a pigment and a releasing agent. The lowest crossover temperature of the toner at which the storage modulus (G′) and the loss modulus (G″) of the toner are substantially equal to each other may be in the range of about 65 to about 80° C. The weight average molecular weight (Mw) of the toner may be in the range of about 65,000 to about 75,000. The z-average molecular weight (Mz) of the toner may be in the range of about 110,000 to about 220,000. | 06-24-2010 |
20100159380 | TWO-COMPONENT DEVELOPER, REPLENISHING DEVELOPER, AND IMAGE-FORMING METHOD - A two-component developer containing a cyan toner and a magnetic carrier, wherein the cyan toner has the characteristics: (i) when the concentration of the cyan toner in a solution of the cyan toner in chloroform is represented by Cc (mg/ml) and the absorbance of the solution at a wavelength of 712 nm is represented by A712, a relationship between Cc and A712 satisfies the relationship of 2.0006-24-2010 | |
20110097661 | TWO-COMPONENT DEVELOPER, REPLENISHING DEVELOPER, AND IMAGE-FORMING METHOD - An object of the present invention is to provide a two-component developer which can achieve a high-definition image with a smaller toner laid-on level than a conventional one, provides a color gamut comparable to that of printing, can respond to an increase in printing speed, and allows an image with a stable tinge to be formed even in long-term use. The object can be achieved by a two-component developer containing a cyan toner and a magnetic carrier, the two-component developer being characterized in that the cyan toner has the following characteristics: (i) when the concentration of the cyan toner in a solution of the cyan toner in chloroform is represented by Cc (mg/ml) and the absorbance of the solution at a wavelength of 712 nm is represented by A712, a relationship between Cc and A712 satisfies the relationship of 2.0004-28-2011 | |
20110104606 | COLOR TONER AND METHOD FOR PREPARING THE SAME - A method of preparing a color toner by: a) preparing an anionic polymer composite emulsion comprising wax with a wax particle and nanosilica as core by in situ emulsion polymerization; b) preparing a cationic polymer composite emulsion comprising colorant with a colorant and nanosilica as core by in situ emulsion polymerization; c) agglutinating the anionic polymer composite emulsion comprising wax and the cationic polymer composite emulsion comprising colorant; and d) filtering, washing, and drying the product obtained in c). The color toner prepared by this method. The color toner has high development density, high resolution, low bottom ash, low waste rate, and low consumption, and is easy to recover and recycle. | 05-05-2011 |
20110177446 | HYDROPHOBIC SILICA MICROPARTICLES AND COMPOSITION FOR ELECTROPHOTOGRAPHIC TONER - Provided are silica microparticles having a fine primary particle size suitable for an external toner additive, the microparticles including no bulky agglomerated particles responsible for a decrease in dispersibility into toner and fluidity of toner. The microparticles are capable of preventing detachment from toner, and are superior in effects of imparting uniform dispersibility and fluidity, thereby preventing a white point on printed images from occurring. The silica microparticles are characterized in that the silica microparticles are produced using hexamethyl disilazane or organo-polysiloxane by carrying out hydrophobization of hydrophilic silica microparticles having an average primary particle size of from 20 to 100 nm produced by a gas phase method, and that a ratio of agglomerated particles having a particle size of 1.5 μm or more is less than a predetermined value by determining using laser diffractometry by a volume-based particle size measurement of the particle. | 07-21-2011 |
20110244387 | LOW-SURFACE AREA FUMED SILICON DIOXIDE POWDER - Fumed silicon dioxide powder with a BET surface area of 20 to 35 m | 10-06-2011 |
20110287356 | TONER, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD AND PROCESS CARTRIDGE - An electrostatic image developing toner including toner core particles each containing at least a first resin and a colorant, and fine resin particles formed of a second resin, wherein part of each of the fine resin particles is embedded in each of the toner core particles, and the remaining part of the fine resin particle is exposed on a surface of the toner core particle to form a protrusion, and wherein when a rate of the part of the fine resin particle to the fine resin particle is indicated by an embedment rate, an average of the embedment rates in the fine resin particles is 40% to 80%. | 11-24-2011 |
20120094225 | TWO-COMPONENT DEVELOPER, REPLENISHING DEVELOPER, AND IMAGE-FORMING METHOD - A two-component developer containing a cyan toner and a magnetic carrier, the cyan toner having the following characteristics: (i) when the concentration of the cyan toner in a solution of the cyan toner in chloroform is represented by Cc (mg/ml) and the absorbance of the solution at a wavelength of 712 nm is represented by A712, a relationship between Cc and A712 satisfies the relationship of 2.0004-19-2012 | |
20120115079 | TONER - A toner containing toner particles, each of which contains a binder resin and a colorant, and silica particles, wherein the silica particles have a volume average particle diameter (Dv) of 70 nm or more and 500 nm or less, the variation coefficient of diameters of the silica particles, based on volume distribution thereof, is 23% or less, and wherein when the silica particles are heated from 105° C. to 200° C., the ratio of mass decrease is 0.60% or less. | 05-10-2012 |
20120189952 | ELECTROPHOTOGRAPHIC TONER AND PROCESS OF PREPARING THE SAME - An electrophotographic toner and a process for preparing the same. The electrophotographic toner includes a binder, a coloring agent, and a release agent. The binder includes two resins having different weight average molecular weights. | 07-26-2012 |
20120237867 | TONER, DEVELOPER, AND METHOD OF MANUFACTURING TONER - A toner is provided including a mother particle and an external additive covering the surface of the mother particle. The mother particle includes a binder resin and a release agent. The external additive includes a hydroxyapatite silica complex porous particle having a number average particle diameter of 160 nm or less. | 09-20-2012 |
20130101934 | TONER FOR DEVELOPING ELECTROSTATIC IMAGES - An object of the present invention is to provide a toner for developing electrostatic images, which prevents a decrease in toner charge amount in the environment of high temperature and high humidity, prevents occurrence of fog and has excellent flowability. | 04-25-2013 |
20130108951 | Two-component developer | 05-02-2013 |
20130273468 | Methods To Control Electrical Resistivity In Filler-Polymer Compositions And Products Related Thereto - Methods to control electrical resistivity in filler-polymer compositions are described using dual phase fillers. Polymer compositions containing the dual phase fillers are further described. | 10-17-2013 |
20140080048 | TONER AND METHOD FOR PRODUCING TONER - A toner is provided that can maintain high transferability even in long-term image output, can maintain high chargeability even in a high temperature and high humidity environment, and rarely causes fogging due to charging failure. The toner contains toner particles produced by a suspension polymerization method or a dissolution suspension method. The volume-average particle diameter (Dv) of silica particles is 50 nm or more and 800 nm or less. The mass loss rate due to heating of the silica particles from 105° C. to 200° C. is 0.60% or less. The hydrophobicity of the silica particles is 5% or more and less than 40%. | 03-20-2014 |
20140141367 | ELECTROSTATIC IMAGE DEVELOPING TONER - The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount. | 05-22-2014 |
20140170550 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - Provided is an electrostatic charge image developing toner including toner base particles which contain a polyester resin and a vinyl resin and does not have a coating layer and wherein the concentration of the polyester resin on the particle surface is higher than the concentration of the polyester resin in the inside of the particles, and a sol-gel silica which has an average circularity of from 0.75 to 0.9, on the surface of the toner base particles. | 06-19-2014 |
20140234767 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER - Provided is an electrostatic charge image developing toner, including: toner base particles including a polyester resin as a binder resin; and an external additive on the surface of the toner base particles. The external additive includes silica. The silica is produced by sol-gel method, and is aspherical. The percentage of change in the specific surface area of the toner when it is stored under high-temperature, high-humidity conditions is from 25% to 45%. | 08-21-2014 |
20140302434 | Carrier Resins with Improved Relative Humidity Sensitivity - The disclosure describes acrylate carrier resins, optionally, with a C/O of at least about 4, comprising a heterocycle comprising sulfur, exhibiting high charge and improved RH sensitivity, carrier compositions comprising the acrylate-coated carriers and developers comprising a toner and the acrylate-coated carrier. | 10-09-2014 |
20140329176 | TONER AND IMAGE FORMING METHOD - Provided is a toner that allows a transferred image to be stably output regardless of smoothness of a transfer material even under high-temperature and high-humidity environment or under low-temperature and low-humidity environment, that is excellent in cleanability for a transfer member even at the time of high-speed printing, and that causes less member contamination. The toner is a toner including toner particles each containing a binder resin and a wax, and silica fine particles on surfaces of the toner particles, wherein the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less, a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less, and the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less. | 11-06-2014 |
20140370432 | Carrier Resins With Improved RH Sensitivity - The instant disclosure describes acrylate-coated carrier resins exhibiting both high charge and improved RH sensitivity, carrier compositions comprising the acrylate coated carriers and developers comprising the carrier resins. | 12-18-2014 |
20150140486 | TONER AND METHOD OF MANUFACTURING SAME - A toner includes a plurality of toner particles that each include a toner mother particle and an external additive adhering to a surface of the toner mother particle. The toner mother particle includes a core and a shell layer disposed over a surface of the core. The external additive contains silica particles. The toner mother particle has a hydrophobicity of at least 0% and less than 20%. The external additive has a hydrophobicity of at least 5% and no greater than 20%. The hydrophobicity of the toner mother particle is less than the hydrophobicity of the external additive. | 05-21-2015 |
20160091809 | MAGNETIC TONER - Provided is a magnetic toner in which enhancement of initial transfer efficiency and transfer efficiency that is stable during a long-term use are achieved by simultaneously suppressing the friction force between the toner and a drum and the cohesion between toners, and further the degradation in chargeability and fluidity caused by the deterioration of the toner. The magnetic toner includes: a magnetic toner particle; a first external additive; and a second external additive. The first external additive includes an organic-inorganic composite fine particle, a plurality of convexes derived from an inorganic fine particle being present on a surface of the organic-inorganic composite fine particle, and has a number-average particle diameter of 50 nm or more and 500 nm or less. The second external additive includes a silica fine particle and has a number-average particle diameter of 5 nm or more and 30 nm or less. A shear load calculated from a rotation torque is 0.50 kPa or more and 2.00 kPa or less when a disc-shaped disc is pressed against a surface of a magnetic toner powder layer, the magnetic toner powder layer being produced by applying a vertical load of 9.0 kPa to the magnetic toner, under a vertical load of 5.0 kPa, and the disc which is being pressed is rotated, and an absolute value |ζ(T)−ζ(A1)| of a difference between a zeta potential ζ(T) of the magnetic toner particle dispersed in water and a zeta potential ζ(A1) of the first external additive dispersed in water is 50 mV or less. | 03-31-2016 |
20160116856 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER AND MANUFACTURING METHOD OF THE SAME - An electrostatic latent image developing toner includes toner particles that each include a toner mother particle. The toner mother particle includes a toner core, a shell layer disposed over a surface of the toner core, and inorganic particles. The inorganic particles are located at an interface between the toner core and the shell layer, or within the shell layer. The shell layer contains a thermosetting component. The toner mother particle has a BET specific surface area of at least 0.95 m | 04-28-2016 |
20160139521 | TONER - Provided is a toner, including: a toner particle containing a binder resin and a colorant; and an inorganic fine particle, in which the toner particle has an average circularity of 0.960 or more, and in which the toner satisfies the formula (1) and the formula (2). | 05-19-2016 |
20160154331 | TONER AND METHOD OF PRODUCING TONER | 06-02-2016 |
20160161874 | MAGNETIC TONER - A magnetic toner comprising a toner particle containing a styrene resin as a binder resin and a magnetic substance, and a first inorganic fine particle on surface of the toner particle and an organic-inorganic composite fine particle on the surface of the toner particle, wherein the first inorganic fine particle i) contains at least one inorganic oxide fine particle selected from the group consisting of silica fine particle, titanium oxide fine particle and alumina fine particle, with the proviso that the inorganic oxide fine particle contains silica fine particle in an amount of 85 mass % or more based on the total mass of the inorganic oxide fine particle, and ii) has a number-average particle diameter (D1) of 5 nm or more and 25 nm or less, the coverage ratio A of the toner-particle surface with the first inorganic fine particle is 45.0% or more and 70.0% or less. | 06-09-2016 |
20160179024 | TONER | 06-23-2016 |
20160187799 | EXTERNAL ADDITIVE FOR TONER, METHOD OF PRODUCING THE SAME, AND TONER COMPRISING THE SAME - An external additive for toner includes a particulate obtained from a silicone compound selected from a silane compound represented by Chemical Formula 1, Si(OR | 06-30-2016 |
20160202623 | ELECTROSTATIC LATENT IMAGE DEVELOPING TONER | 07-14-2016 |
20160202625 | TWO-COMPONENT DEVELOPER | 07-14-2016 |