Patent ID: 7449275
Filing Date: 2008-11-11
Classification: G03G

Abstract:
1. A process for preparing a toner comprising the steps of: (I) melt-kneading a raw material mixture containing a resin binder and a colorant; (II) cooling the melt-kneaded mixture obtained in the step (I) and pulverizing the cooled mixture to give a pulverized product having a volume-median particle size (D (III) pulverizing the pulverized product obtained in the step (II) in the presence of from one to m external additives having an average particle size of from 8 to 50 nm; and (IV) classifying the pulverized product obtained in the step (III), wherein the resulting toner has a volume-median particle size (D wherein Dt is a volume-median particle size of a desired toner (D