Patent ID: 7741001

Claim:
A process for preparing a toner for electrostatic image development, the process comprising the steps of: (S1) preparing an aqueous resin particle dispersion containing self-dispersible polyester resin particles as a binder resin but not containing a surfactant, and then mixing an aqueous pigment dispersion and the aqueous resin particle dispersion to prepare a mixture; and (S2) adding a polyvalent metal salt as a flocculant to the mixture while stirring to form aggregates of the pigment bonded to the resin particles, wherein the self-dispersible polyester resin is prepared by reacting a carboxylic acid compound with an alcohol compound inclusive of a polyhydric alcohol, and additionally introducing polyfunctional carboxylic acids into a reaction system of the self-dispersible polyester resin in a terminal period of polymerization of said carboxylic acid compound with said alcohol compound, the carboxylic acid compound being one or more of a polycarboxylic acid having three or more carboxyl groups and its anhydride, said self-dispersible polyester resin having in its main chain a carboxyl group or carboxylic salt as a hydrophilic group.