TONER COMPOSITION FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT COMPRISING COLORANT AND CENTER RESIN PARTICLE FOR BLENDING EXCESS AMOUNT OF COLORANT, PREPARATION METHOD THEREOF AND ELECTROSTATIC LATENT IMAGE DEVELOPER COMPOSITION CONTAINING THE TONER COMPOSITION

摘要

PURPOSE: A toner composition for electrostatic latent image development, its preparation method and an electrostatic latent image developer composition containing the toner composition are provided, to allow excess amount of a narrow and uniform size distribution of toner particles (colorant) to be blended in the composition without the deterioration of a resin. CONSTITUTION: The toner composition comprises 3.0-30.0 wt% of a colorant; and the balance of a center resin particle which has a glass transition temperature of 40-90 deg.C, a weight average molecular weight of 5,000-40,000 g/mol and a volume average diameter of 3-12 micrometers and is coated with the colorant, wherein 80 wt% of the particle fall within 0.5-1.5 times of the volume average diameter. The center resin particle is a single resin or a mixture of a resin with at least one additive selected from a wax and a charge control agent. Preferably the resin is a polyester resin or a styrene copolymer resin; and the wax is at least one selected from the group consisting of a paraffin wax, an ester wax, an amide wax, a polyethylene wax, a polypropylene wax, a carnauba wax and a beads wax. The electrostatic latent image developer composition comprises the toner composition and a particle carrier, wherein the carrier is at least one compound selected from the group consisting of ferrite coated a surfactant, steel and iron powder.