| 摘要 |
The present invention provides a charge control agent including, as an effective component, at least one type of a thiophene dicarboxylic acid derivative represented by general formula (1). (In general formula (1): R1 and R2 may be the same or different from one another and represent a hydrogen atom, etc.; R3 and R4 may be the same or different from one another and represent a hydrogen atom, a C1-8 linear or branched alkyl group, etc.; and R5 and R6 may be the same or different from one another and represent a C5-10 cycloalkyl group that may have a substituent, a substituted or non-substituted aromatic hydrocarbon group, etc.) |
