| 摘要 |
PURPOSE:To obtain a toner electrostatically chargeable sufficiently and uniformly without scattering among the particles, and having stable characteristics in the system of an image developing means by incorporating a specified compd. as an electrostatic charge controller in the toner. CONSTITUTION:A toner contains as a charge controller a compd. represented by the formula as shown on the right in which R1, R2 are each NH or O; R3- R5 are each H, halogen, 1-5C alkyl, aralkyl, alkoxy, or acyl. Said compd. is alone or in combination of 2 kinds of said compds. preferably in an amt. of 1-20wt% of a binder resin, such as polymer of styrenes or vinyl esters. |
