| 摘要 |
PURPOSE:To obtain a developer stable in a triboelectrified amt., sharp and uniform in its distribution, and controllable to a triboelectrified amt. suitable to a developing system to be used by incorporating a specified compd. CONSTITUTION:The developer contains a compd. stable with respect to heat and time lapse, small in hygroscopicity, and a high-quality electrostatic charge controller capable of giving excellent electrophotographic characteristics to the developer contg. it, and it is one of compds. represented by formula (1)f in which R is H, alkyl, aryl, aralkyl, or acyl, or one of substituents derived from these hydrocarbons as basic structures, or a heterocyclic group optionally substd. by one or more alkyl, aralkyl, alkoxy, or aryl groups or one of derives. from these basic structures, and A<-> is an anion of Cl<->, Br<->, I<->, SO<2->4, SO<2->3, or NO<->3. |
