Patent ID: 8029959

Claim:
A toner containing at least a resin, a colorant and a charge control agent, the charge control agent comprising a specific type of gallic acid metal complex represented by the following Chemical Formula (1) or Chemical Formula (2): wherein in the formula (1), R 1 represents an alkyl group containing 1-12 carbon atoms, an alkenyl group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, or a hydrogen atom; R 2 and R 4 can independently represent an alkyl group containing 1-12 carbon atoms, an alkenyl group containing 2-12 carbon atoms, an alkoxy group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, a halogen atom, or a hydrogen atom; R 3 represents an alkyl group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, a potassium atom, a sodium atom or a hydrogen atom; M represents a divalent to tetravalent metal atom, A is a counterion, m is a number from 1 to 3, and n is 1 or 2; wherein in the formula (2), R 1 represents an alkyl group containing 1-12 carbon atoms, an alkenyl group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, or a hydrogen atom; R 2 and R 4 independently represent an alkyl group containing 1-12 carbon atoms, an alkenyl group containing 2-12 carbon atoms, an alkoxy group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, a halogen atom, or a hydrogen atom; R 3 represents an alkyl group containing 1-12 carbon atoms, a substituted or unsubstituted aryl group containing 6-12 carbon atoms, a potassium atom, a sodium atom or a hydrogen atom; R 5 and R 6 independently represent a carboxyl group, or a halogen atom; M represents a divalent to tetravalent metal atom, A is a counterion, m is a number from 1 to 3, and n is 1 or 2.