Patent ID: 7094513
Filing Date: 2006-08-22
Classification: C09B,G03G

Abstract:
1. A toner for developing an electrostatic image comprising: a resin for the toner, and a charge control agent comprising aggregate particles of an azo-type iron complex salt represented by the following chemical formula [I]: wherein R 1− , R 2− , R 3− , and R 4− are the same or different and selected from the group consisting of a hydrogen atom, an alkyl group having a straight or branch chain of 1 to 18 carbon atoms, an alkenyl group having a straight to branched chain of 2 to 18 carbon atoms, a sulfonamide group being to have substitutional groups, a mesyl group, a hydroxyl group, an alkoxyl group of 1 to 18 carbon atoms, an acetylamino group, a benzoylamino group, a halogen atom, a nitro group and an aryl group being to have substitutional groups; R 5− is a hydrogen atom, an alkyl group having a straight or branched chain of 1 to 18 carbon atoms, a hydroxyl group or an alkoxyl group of 1 to 18 carbon atoms; R 6− is a hydrogen atom, an alkyl group having a straight or branched chain of 1 to 18 carbon atoms, a hydroxyl, group, a carboxyl group, a halogen atom, or an alkoxyl group of 1 to 18 carbon atoms; and n is 0.7 to 0.99, said aggregate particles have an average size of 1 to 4 microns and an average particle size of a primary particulate crystalline that is formed by fining the aggregate particles with ultrasonic irradiation, is at most 3 microns.