Patent ID: 7118841
Filing Date: 2006-10-10
Classification: G03G

Abstract:
1. A toner for developing an electrostatic image comprising: a colored particle comprising a binder resin, a colorant, a charge control agent and a rosin ester having an acid value of 2 or less, wherein the colored particle is prepared by subjecting a polymerizable monomer composition containing a polymerizable monomer, a colorant, a charge control agent and a rosin ester having an acid value of 2 or less to polymerization in an aqueous dispersion medium including a dispersion stabilizer, said colored particle has an average sphericity of 1 to 1.3; and an external additive, and further wherein the rosin ester is an esterification compound of a rosin compound with a polyalcohol, wherein the esterification compound is reacted with an epoxy compound.