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6835517 Toner, developer and image forming method using the toner  
A toner including at least a binder resin; a colorant; a charge controlling agent; and a wax (B), in which the charge controlling agent comprises a compound selected from the group consisting of:...
6830859 Charge control agent and toner using same  
A charge control agent containing a barium salt of a sulfoisophthalic acid compound and optionally a metal salt of a salicylic acid compound. A toner for developing an electrostatic latent image...
6824943 Toner for electrostatic image development  
The present invention provides a toner for electrostatic image development which employs a black colorant free from a toxic substance and exhibits stable charge behavior even after extended use or...
6824944 Toner  
A toner process involving, for example, contacting a toner surface with a reducing agent and a metal halide.
6808852 Toner and heat-fixing method  
A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed...
6800413 Low-silanol silica  
A silylated silica having an SiOH density per nm2 of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading,...
6797447 Electrostatic image developer  
By simultaneously atomizing a siloxane and two organometallic compounds of different metals M1 and M2 exclusive of silicon in a flame for combustion, spherical amorphous ternary complex oxide fine...
6783908 Surface-treated toner particles, process for forming, and electrostatographic developer containing same  
An electrostatographic toner composition consists essentially of noncrosslinked linear polymeric toner particles, about 0.7 wt. % to about 4 wt. % of hydrophobic silica particles disposed on the...
6780556 EXTERNAL ADDITIVE FOR ELECTROPHOTOGRAPHIC TONER, METHOD FOR MANUFACTURING THE EXTERNAL ADDITIVE, ELECTROPHOTOGRAPHIC TONER USING THE EXTERNAL ADDITIVE, AND IMAGE FORMING APPARATUS USING THE ELECTROPHOTOGRAPHIC TONER  
An external additive for a toner, having an average primary particle diameter not greater than 100 nm and including at least inorganic fine particles and a hydrophobizing agent applied to the...
6770411 Negatively chargeable toner  
A toner including a binder resin, a colorant, and a product of an iron compound containing an aromatic hydroxylcarboxylic acid as a ligand and represented by the formula (I) described in the...
6762004 Charge control agent and toner for developing electrostatic images  
Charge control agent and toner for developing electrostatic images containing said charge control agent. The active ingredient of the charge control agent is a metal compound obtainable by...
6733940 Toner for magnetic ink character recognition system and non-magnetic monocomponent development method  
The present invention provides a toner for MICR suitable for use in a printer for a non-magnetic monocomponent developing system, which does not produce scratches on a developing sleeve when used...
6706457 Non-magnetic single-component toner and developing method using the same  
A non-magnetic single-component toner comprises: silica A having a specific surface area of 30 to 70 m2/g as determined by a BET method, and having a surface which is at least treated with...
6696211 Developer, image-forming method, and process cartridge  
A developer for developing an electrostatic latent image is formed from toner particles each comprising a binder resin and a colorant, inorganic fine powder having a number-average particle size...
6692880 Electrophotographic toner with stable triboelectric properties  
Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a...
6677095 Fine metal oxide powder having high dispersibility and toner composition comprising the same  
Regarding the metal oxide fine powder, which is used as the additive of a powder material and is hydrophobic treated on the surface, the peak of the particle size distribution of the agglomerated...
6677094 Toner for non-magnetic monocomponent development  
By reducing non-transferred toner on a photosensitive member, image density is sufficiently maintained and fogging in the non-imaged portion is prevented. The developing agent for non-magnetic...
6664016 Magenta toner  
A magenta toner having a storage elastic modulus at 80° C., G′80, from 1×106 dN/m2 to 1×108 dN/m2 and a storage elastic modulus at 120° C. to 180° C., G′120-180, from 2×103 dN/m2 to 1×106 dN/m2,...
6656654 Toner and two-component developer, container therefor, and image forming apparatus  
A toner for developing electrostatic latent images contains a coloring agent, a release agent, a binder resin including a non-linear polyester resin with a hydroxyl number of 30 to 70 mgKOH/g, and...
6623898 Developing agent, method for manufacturing the same, image forming apparatus  
0.01 to 5% by weight of the metal soap is added to the yellow toner and black toner.
6610453 Toner for the development of electrostatic image and process for the preparation thereof  
The present invention provides a process for the preparation of a novel toner satisfying a high resolution, a low temperature fixability and a high offset resistance at a low cost. A novel toner...
6552211 Zirconium compound and electrophotographic toner employing it  
The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which...
6548217 Developing agent, method of measuring free component content of additive in developing agent, and method of evaluating developing agent  
Generation of a drum filming layer is prevented by obtaining a developing agent meeting the relationship y<0.057x+0.1748, where x represents the total addition amount of the additive, which is not...
6544710 Reactive compatibilization of polymeric components such as siloxane polymers with toner resins  
A toner composition comprising a primary resin and at least one additional polymeric component is improved by reactive compatibilization of the additional polymeric component and the resin. For...
6514654 Two-component developer and image forming method  
A two-component developer is formed as a mixture of a negatively chargeable toner and a resin-coated carrier. The toner comprises at least a binder resin, a colorant and an organic metal compound....
6503676 Toner, external additive therefor and image forming method using the toner  
A toner including a binder resin; a colorant; and an external additive, wherein the external additive includes a particulate inorganic material, and a silicone oil, wherein the silicone oil is...
6503677 Emulsion aggregation toner particles coated with negatively chargeable and positively chargeable additives and method of making same  
An emulsion aggregation toner particularly adapted for use in hybrid scavengeless development includes toner particles of polymer binder, colorant and a surface additive package containing at...
6503675 Toner and toner manufacturing method  
Toners comprise toner mother particles in a mean particle size A [μm] containing a metallic complex and zinc stearate in a mean particle size 2-A [μm] externally added to the toner mother...
6485875 Toner and resin composition for the toner  
A toner is constituted by at least a binder resin, a colorant and a wax. The binder resin has been formed from monomers including a vinyl monomer and polyester-forming monomers containing at least...
6475688 Electrophotographic toner, and image forming apparatus and image forming method using the same  
An electrophotographic toner is disclosed. The toner contains resinous composition comprising a lower molecular weight component having peak at molecular weight of 3,000 to 50,000 and a higher...
6447968 Magnetic toner, process for producing magnetic toner, and image forming method  
A magnetic toner for developing an electrostatic latent image has magnetic toner particles containing at least a binder resin, a magnetic powder and a wax component. The magnetic powder has...
6447970 Toner containing aluminum benzilic acid compound and image forming method  
A toner contains at least a binder resin, a colorant, a wax and an aluminum compound, wherein the binder resin has an acid value of 1 to 40 mgKOH/g; the binder resin contains 2% to 50% by weight...
6420078 Toner compositions with surface additives  
A toner composition includes a binder, a colorant, and a treated alumina, wherein the treated alumina includes alumina particles treated with a treatment agent. The treatment agent can be, for...
6420079 Electrophotographic toner and electrophotographic apparatus  
An electrophotographic toner constituting a dual component is composed of toner base particles and fine inorganic particles having a volume mean diameter of 250 to 600 nm with a specific surface...
6416916 Toner and developer for magnetic brush development system  
A toner of toner particles containing at least one binder, at least one color ant, and an external additive package comprised of zinc stearate and at. least one of silicon dioxide or titanium...
6399264 Developer for electrostatic latent image  
An electrostatic developer comprising a mixture of (1) toner components containing image-forming particles, (2) positively charged particles, (3) negatively charged particles, and (4) a lubricant.
6391508 Toner and two-component developer for electrostatic image development  
The present invention relates to a toner and a two-component developer which can produce high quality images with decreasing the dependence on environment and the back ground during continuous...
6383702 Dry toner of polymerization type for electronic photography  
A dry toner of polymerization type for electronic photography for forming an image on a recordable medium is synthesized during a polymerization process by adding a hydrophobic silica system...
6379856 Toner compositions  
A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m2/g of from about 35 to about 65, a bulk...
6350551 Yellow toner  
A yellow toner comprising fine resin particles and an external additive being added to surfaces of the fine resin particles, wherein the fine resin particles comprise (a) a resin binder comprising...
6326114 Toner, and process for producing a toner  
A toner includes at least a polyester resin having a carboxyl group, a coloring agent, 0.1-10 mass % of a metal salicylate compound with respect to a mass of the toner and 20-400 ppm of a hindered...
6319647 Toner and developer for magnetic brush development system  
A toner of toner particles containing at least one binder, at least one colorant, and preferably one or more external additives is advantageously formed into a developer and used in a magnetic...
6316157 Toner and image forming method  
A non-metallic black toner is disclosed. The toner has toner particles containing at least a binder resin, a carbon black and an organometallic compound, and an external additive. The toner...
6316155 External additive for electrostatically charged latent image developing toner  
An external additive for electrostatically charged latent image developing toner is provied. The additive includes spherical hydrophobic fine silica particles having primary particles having a...
6312861 Toner compositions  
A toner comprised of resin, colorant and a coated silica, and wherein said silica has a primary particle size of about 25 nanometers to about 55 nanometers, and an aggregate size of about 225...
6312862 Two-component type developer and image forming method  
A two-component type developer has a negatively chargeable toner having toner particles and an external additive and a magnetic-fine-particle-dispersed resin carrier. The...
6265126 Hydrophobic metal oxide powder and application thereof  
A hydrophobic metal oxide powder obtained by simultaneously surface-treating a powder of a metal oxide (for example, silica, titania, alumina, or the like) with silicone oil having epoxy groups...
6242147 Negatively chargeable toner and developing device using thereof  
The present invention relates to a negatively chargeable toner comprising fine toner particles which contain a thermoplastic resin, a colorant, and a specified compound; the toner externally...
6232027 Toner having negative triboelectric chargeability and image forming method  
A toner having a negative triboelectric chargeability is constituted by at least a binder resin, a colorant and an organic metal compound. The toner is characterized by: (a) the organic metal...
6218065 Toner having negative triboelectric chargeability and developing method  
A toner having a negative triboelectric chargeability and suitable for developing positively or negatively charged images is composed of at least a binder resin, a colorant and an organic metal...