Toner for developing electrostatically charged images

摘要

To provide toners having good color developing properties without being influenced by tones of charge control agents.

MEANS FOR SOLVING

A toner for developing electrostatically charged images containing at least a binder resin, a colorant and a charge control agent, wherein the charge control agent is an aromatic compound which generates at least sulfur dioxide and a butylphenol as thermally decomposed products when the temperature is raised from room temperature to 250°C at a rate of 10°C/min; and is any one of or a mixture of two or more of a substance of a chemical structure having both an aromatic ring to which one or more tert-butyl groups are attached and an aromatic ring to which one or more sulfonyl groups are attached, a mixture comprising a substance of a chemical structure having an aromatic ring to which one or more tert-butyl groups are attached and a substance of a chemical structure having an aromatic ring to which one or more sulfonyl groups are attached, and a substance of a chemical structure including an aromatic ring to which both one or more tert-butyl groups and one or more sulfonyl groups are attached.