| 摘要 |
PURPOSE:To provide a negatively chargeable toner not contg. a metal such as Cr. CONSTITUTION:This negatively chargeable toner is obtd. by using a compd. not contg. a metal represented by the formula, wherein each of X1 and X2 is H or an electron withdrawing group but X1 and X2 are not simultaneously H and R is H, halogen, alkyl, cycloalkyl, aralkyl, aryl, alkoxy or hydroxyl. |
