| 摘要 |
To provide a charge control agent and a toner having a superior charging characteristic. A charge control agent containing a bis-phthalimide derivative represented by formula. Thus, it is possible to provide a safe, negative chargeability charge control agent with which the rate of rise of the charge can be increased, and which has a high charging amount and poses no problem in terms of waste regulations. Furthermore, it is possible to provide a negatively chargeable toner (and particularly, a negatively chargeable polymerized toner) for electrostatic image development which uses this charging control agent and has a superior charging characteristic. |
| 主权项 |
1. A charge control agent, comprising a bisphthalimide derivative represented by a formula (1) (where X represents a carbonyl group, a sulfur atom, a sulfinyl group, a sulfonyl group or a single bond; R1 and R2 each represents a linear or branched alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, an aromatic hydrocarbon group, a heterocyclic group or a fused polycyclic aromatic group; R3 to R8 each represents a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a trifluoromethyl group, a nitro group, a linear or branched alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, a linear or branched alkenyl group having 2 to 6 carbon atoms, a linear or branched alkyloxy group having 1 to 8 carbon atoms, a cycloalkyloxy group having 5 to 10 carbon atoms, an aromatic hydrocarbon group, a heterocyclic group, a fused polycyclic aromatic group or an aryloxy group, note that R1 to R8 each may have a substituent, R3 to R5 and R6 to R8 may bond each other to form a ring). |
