Specific examples of the aromatic polyamines (having 6 to 20 carbon atoms) include, but are not limited to, unsubstituted aromatic polyamines, aromatic polyamines having nuclear substitutive alkyl groups (having 1 to 4 carbon atoms such as methyl group, ethyl group, n-propyl or i-propyl group, butyl group), aromatic polyamines having nuclear substitutive electron attractive groups (e.g., halogen g