Patent ID: 8247147
Filing Date: 2012-08-21
Classification: G03G

Abstract:
1. A toner comprising toner particles each containing at least a binder resin, a colorant and a wax, wherein: the binder resin comprises a vinyl-based resin as a main component; the toner contains tetrahydrofuran (THF) insoluble matter in a content of 0.0 mass % or more to less than 1.5 mass % with respect to the binder resin; the toner has a main peak (Hr the toner has a main peak in a molecular weight domain Dm wherein a maximum height of peak (Hr wherein a maximum height peak (Hm wherein the toner particles are produced by granulating a polymerizable monomer composition containing styrene monomer, the colorant, the wax and an addition-reactive styrene resin having a double bond in an aqueous medium and polymerizing the resultant by suspension polymerization; wherein the addition-reactive styrene resin having a double bond is a styrene-butyl acrylate copolymer having a double bond; wherein the toner particles have an average circularity of 0.970 to 1.000; wherein peaks in the addition-reactive styrene resin originating from the double bond are present in the range of 4.6 to 4.9 ppm and in the range of 5.0 to 5.2 pm in wherein an endothermic chart of the toner measured by differential scanning calorimetry (DSC) has an endothermic main peak in the range of 40 to 130° C.; and a heat quantity integration value Q represented by a peak area of the endothermic main peak is 10 to 35 J per 1 g of the toners; and wherein the wax is present in the toner particles in an amount of 2 to 30 mass %.