| 摘要 |
PURPOSE:To obtain the toner which forms sharp images and allows continuous use by incorporating a specific comps. as a charge control agent into the toner and using the colorless charge control agent which has high mechanical friction and impact stability and temp. and humidity stability. CONSTITUTION:The charge control agent has the high mechanical friction and impact stability and temp. and humidity stability and is colorless and, therefore, when the compd. expressed by formula I is incorporated into this agent, the electrophotographic toner which forms the sharp images and allows continuous use is obtd. In the formula, R1: a hydrogen atom or alkyl group, R2: an aryl group, aryloxy group, acyl group, aryloxycarbonyl group, acyloxy group, sulfonyl group, alkoxysulfonyl group, aryloxysulfonyl group, sulfonyl oxy group, alkylamide group, aminoacyl group, sulfoneamide group, aminosulfonyl group, cyano group, aralkyl group, alicycle (including a condensed ring), m: 1 to 4, M: bivalent metal. |
