Patent ID: 6689525
Filing Date: 2004-02-10
Classification: C09B,G03G

Abstract:
A toner comprising toner particles containing at least a binder resin and a pigment, wherein the pigment has been treated with a pigment-dispersing agent comprising a compound represented by the following Formula (1) or (2), wherein at least one of R1, R2, R3 and R4 represents a substitute X: wherein a substituent Y is a polymer unit selected from the group consisting of a polystyrene unit, a styrene-acrylate copolymer unit, a styrene-methacrylate copolymer unit, a styrene-acrylic acid copolymer unit and a styrene-methacrylic-acid copolymer unit, and others each represent a hydrogen atoms, wherein at least one of R1, R2, R3 and R4 represents a substituent X: wherein a substituent Y is a polymer unit selected from the group consisting of a polystyrene unit, a styrene-acrylate copolymer unit, a styrene-methacrylate copolymer unit, a styrene-acrylic acid copolymer unit and a styrene-methacrylic acid copolymer unit, and others each represent a hydrogen atom, and M represents a divalent metal, a tri- or tetravalent substituted metal, or an oxy-metal.