Patent ID: 8900785

Claim:
A charge control agent comprising a barbituric acid derivative represented by the following general formula (1), General formula (1): wherein, R 1 and R 2 may be the same or different, and are alkyl groups having 1 to 6 carbon atoms, cycloalkyl groups having 5 to 8 carbon atoms, aryl groups or heterocyclic groups, R 3 is a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkyloxy group having 1 to 8 carbon atoms, a cycloalkyloxy group having 5 to 10 carbon atoms, an aryloxy group, an aryl group or a hetrocyclic group, R 4 to R 8 may be the same or different, and are hydrogen atoms, deuterium atoms, fluorine atoms, chlorine atoms, bromine atoms, iodine atoms, hydroxyl groups, cyano groups, nitro groups, alkyl groups having 1 to 8 carbon atoms, cycloalkyl groups having 5 to 10 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, alkyloxy groups having 1 to 8 carbon atoms, cycloalkyloxy groups having 5 to 10 carbon atoms, aryl groups, heterocyclic groups or aryloxy groups, and may be bonded to each other to form a ring and, further, R 4 may be bonded to R 3 to form a ring, V, W, X, Y and Z are carbon atoms or nitrogen atoms, and at least two of V, W, X, Y and Z are carbon atoms, p is a number of 0 or 1, and is 1 if V is a carbon atom and is 0 if V is a nitrogen atom, q is a number of 0 or 1, and is 1 if W is a carbon atom and is 0 if W is a nitrogen atom, r is a number of 0 or 1, and is 1 if X is a carbon atom and is 0 if X is a nitrogen atom, s is a number of 0 or 1, and is 1 if Y is a carbon atom and is 0 if Y is a nitrogen atom, and t is a number of 0 or 1, and is 1 if Z is a carbon atom and is 0 if Z is a nitrogen atom.