Patent ID: 7452647
Filing Date: 2008-11-18
Classification: G03G

Abstract:
1. A color toner comprising at least a binder resin, a colorant and a release agent, wherein the binder resin has at least a polyester unit and is synthesized in the presence of tin 2-ethylhexanoate as a catalyst, wherein said color toner has an average circularity of 0.922 to 0.955 for the particles having a circle-equivalent diameter of 3 μm or more and said color toner has one or more absorption peaks in a temperature range from 30 to 200° C. and the largest peak at from 60 to 130° C. in a heat absorption curve, established by differential scanning calorimetry (DSC), said color toner has a light transmittance from 10 to 70% in an aqueous solution containing methanol 45% by volume.