Abstract: Provided is an electrostatic charge image developing toner usable for downsized color image forming apparatus capable of rapid print preparation with neither an influence on production cost nor use of a specific material as the toner constituent material. Also disclosed is an electrostatic charge image developing toner possessing at least a resin and a colorant, wherein the electrostatic charge image developing toner contains 12-984 ppm of a polyvalent organic acid or a salt thereof.

Abstract: A toner is provided including a colorant; a resin composition (A) comprising at least one binder resin and a hydrocarbon wax having a melting point of 70-90° C. in an amount of from 6 to 30% by weight based on total weight of resin composition (A), and having a softening point (T1/2(A)) of from 120 to 150° C.; and a resin composition (B) having a softening point (T1/2 (B)) of from 100 to 130° C., wherein a weight ratio of the resin composition (A) to the resin composition (B) is from 10/90 to 45/55, and the following relationship is satisfied: T1/2(A)?T1/2(B)+3; and the use of the toner in an image forming method, an image forming apparatus, and a process cartridge.

Abstract: The object of the invention is to provide a novel aromatic polyester resin useful as a binder resin or charge transporting polymer for an organic photoconductor and an electrophotographic photoconductor having high sensitivity and high durability produced using the above-noted novel aromatic polyester resin. For this object, the invention provides an aromatic polyester resin which has a recurring unit represented by the following Formula (I) and an electrophotographic photoconductor produced using the above-noted aromatic polyester resin. wherein R1 represents any one of a hydrogen atom, an unsubstituted or substituted alkyl group and an unsubstituted or substituted aryl group; Ar1 represents an unsubstituted or substituted aryl group; Ar2 and Ar3 may be the same as or different from each other and represent respectively an unsubstituted or substituted arylene group; and W represents an unsubstituted or substituted divalent aromatic group.

Abstract: Embodiments include a toner with a distilled wax having a crystallinity of from about 55 to about 100 percent, wherein the degree of crystallinity is calculated using the following formulas: [Heat of enthalpy (Hm) J/g/294 J/g]×100=degree of crystallinity (Xc); [Heat of recrystallization (Hrc) J/g/294 J/g]×100=degree of crystallinity (Xc); and Sc/(Sc+Sa)]×100%, wherein Sc is a diffraction peak area of a crystalline component of the wax and the Sa is a diffraction peak area of an amorphous component of the wax; and wherein the Mp, Mn and Mw of the wax are all within the range of from about 500 to about 800, and wherein the wax has a polydispersity of from about 1 to about 1.05.

Abstract: Methods are described for rendering toner particles that are capable of being sufficiently and uniformly charged. The particles may be positively chargeable, non-magnetic, single component toner particles. At least one production method includes emulsifying a charge-controlling agent formed of a synthetic resin in an aqueous medium, the charge-controlling agent having been dissolved in or swollen with an organic solvent; removing the organic solvent; mixing with a suspension of toner base particles containing a binder and a colorant; and heating to fix the charge-controlling agent on the surfaces of the toner base particles. According to at least one method, a positively chargeable non-magnetic single component toner can be produced such that the amount of the charge-controlling agent deposited on the surfaces of the toner base particles falls within a range of 0.2 to 3.0 wt. %, with respect to the total weight of the toner.

Abstract: A toner having its surface functionalized with alkaline resins is provided, and processes for producing the same.

Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains an alkyltriol, such as glycerol, and a photogenerating pigment, such as a Type V titanyl phthalocyanine prepared, for example, by dissolving a Type I titanyl phthalocyanine in a solution of a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution of an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; and treating the Type Y titanyl phthalocyanine with a monohalobenzene.

Abstract: A toner having a core containing a colorant, a release agent and a binder resin (A), and a shell containing a binder resin (B), the shell overlying the core, wherein the binder resin (A) contains a resin having a polyester skeleton, the binder resin (B) contains a vinyl copolymer resin, and a weight ratio of the shell to the core is from 0.05 to 0.5, and wherein the toner has a volume average particle diameter of from 3 to 8 ?m; a toner manufacturing method of such the toner can be used in an image forming apparatus and in a process cartridge.

Abstract: The present invention provides a method for the preparation of a UV curable electrostatographic toner. The process includes the steps of dispersing a polymeric material and a UV curable material and a UV photoinitiator in an organic solvent to form an organic phase. The organic phase is dispersed in an aqueous phase containing a particulate stabilizer to form a dispersion. The dispersion is homogenized and the organic solvent is removed from the dispersed particles in the dispersion which are then recovered.

Abstract: A toner includes binder of amorphous polymer material, such as an amorphous polyester material, and a crystalline polymer material, such as a crystalline polyester material, wherein the amorphous polymer material has an acid number that is greater than an acid number of the crystalline polymer material. Further, the toner may have a minimum fusing temperature of from about 75° C. to about 150° C. and a relative humidity sensitivity of from about 0.5 to about 10. A method of making toner particles is also indicated.

Abstract: The present invention relates to a process for producing a toner which includes the steps of emulsifying a resin binder containing a polyester in an aqueous medium to prepare an emulsion of the resin binder and adding a water-soluble nitrogen-containing compound having a molecular weight of 350 or less to the emulsion obtained in the previous step to aggregate emulsified particles contained in the emulsion. According to the present invention, the shape of toner particles can be controlled simply for a short production time by using a resin binder containing a polyester and using substantially no organic solvent, and further a toner having a narrow and sharp particle size distribution can be produced.

Abstract: The present invention aims to provide a toner for developing electrostatic image which is excellent in image reproducibility and further in cleaning performance. A toner for developing electrostatic image comprising a colored particle containing a binder resin and a colorant, and an external additive, wherein the toner for developing electrostatic image has a volume average particle diameter of 4.0 to 8.0 ?m and an average circularity of 0.940 to 0.980, and wherein the toner for developing electrostatic image has a uniaxial collapsing stress of 0.8 to 1.5 kPa and an internal frictional angle of 30 to 45° when a maximum consolidation stress is 0.

Abstract: Toner compositions having reduced odor are provided.

Abstract: The present invention is directed to an electrostatographic toner having a sulfone charge control agent having the structure X—SO2—Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group. The present invention is also directed to an electorstatographic developer containing the electrostatographic toner having a sulfone charge control agent having the structure X—SO2—Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group and carrier particles.

Abstract: A toner having a high strength magnetite in an amount of from about 10 to about 40 weight percent, wherein the magnetite includes a material selected from the group consisting of FeO, Fe2O3, Fe3O4, gamma iron oxides, cobalt-gamma iron oxides, and mixtures thereof, and further including a developer having a carrier and toner as just described.

Abstract: A coating liquid for an intermediate layer of an electrophotographic photoconductor comprises at least one of alcohol solvents; and N-methoxymethylated nylon, in which the N-methoxymethylated nylon has solution viscosity within a range from 43 mPa·s to 50 mPa·s when dissolving into methanol at 30° C. in a concentration of 20% by mass.

Abstract: In accordance with the invention, there are electrophotographic photoreceptors, image forming apparatus and methods of forming an image. The electrophotographic photoreceptor can comprise a conductive layer comprising a plurality of electroluminescent nanomaterials, a first contact electrically connected to a first edge of the conductive layer and an electrical ground, a second contact electrically connected to a second edge of the conductive layer and a D.C. power supply, and a photosensitive layer disposed over the conductive layer, wherein the photosensitive layer comprises a charge generation material and a charge transport material. The D.C. power supply can be configured to supply a lateral voltage bias at the second contact to generate a localized electroluminescence across the conductive layer and deliver an erase illumination from within the electrophotographic photoreceptor.

Abstract: A toner for developing an electrostatic charge image comprising a resin, a colorant, and a particle having domain-matrix structure and the particle having two or more kinds of metal elements.

Abstract: The invention provides a color image forming method including charging, developing, transferring and fixing. The fixing includes thermally fixing a toner image to paper by using a heating body and a pressurizing member which is positioned opposite to the heating body via a film-like member. The color toner includes a toner particle containing a crystalline resin and a non-crystalline resin. When the color toner is subjected to dynamic viscoelasticity measurement employing a sine wave vibration method, a minimum value of the relaxation elasticity H in a relaxation spectrum obtained from frequency dispersion characteristics when a measurement frequency measured at 60 and 80° C. is 0.1 to 100 rad/sec and a measurement strain at a frequency of 6.28 rad/sec is 0.1 %, is in a range of about 10 to 900 Pa/cm2. A relaxation time ? corresponding to the minimum value is in a range of about 1 to 10,000 sec.

Abstract: A toner manufacturing method is provided including emulsion-polymerizing monomers including an aromatic vinyl monomer, to prepare a particulate resin dispersion; mixing the particulate resin dispersion and a colorant dispersion including a black metallic material, to prepare an aggregation dispersion including aggregated resin particles including the colorant therein; heating the aggregation dispersion to a temperature of not less than a glass transition temperature of the particulate resin to unite each of the aggregated particles to prepare a toner dispersion; and washing the toner dispersion to obtain the toner; a toner manufactured by the above method, and a developer using the toner.