New electrostatographic toners and developers are provided containing new charge-control agents comprising N,N'-substitutedbis(pyridinium) salts having the structure: ##STR1## wherein R is alkylene having from 1 to 20 carbon atoms or arylenedialkylene wherein each alkylene moiety has 1 to 6 carbon atoms and the arylene moiety has from 6 to 14 carbon atoms, R' and R", which are the same or different, represent hydrogen, a straight or branched chain alkyl or alkoxy group having from 1 to 24 carbon atoms, aralkyl or alkaryl in which the alkyl group has 1 to 20 carbon atoms and the aryl group has from 6 to 14 carbon atoms, aryl having 6 to 14 carbon atoms which is unsubstituted or aryl having 6 to 14 carbon atoms which is substituted with one or more nitro, alkoxy or halo groups and X and X', which are the same or different, are chlorine, bromine, fluorine or iodine.
提供了新的静电成像色调剂和显影剂,其中包含新的电荷控制剂,包括具有以下结构的N,N'-取代双(
吡啶)盐:##STR1## 其中R是具有1到20个碳原子的烷基或含有1到6个碳原子的
吡啶基烷基,以及含有6到14个碳原子的芳基烷基,其中每个烷基部分具有1到6个碳原子,R'和R"相同或不同,表示氢,直链或支链烷基或烷氧基,其具有1到24个碳原子,或者表示含有1到20个碳原子的烷基和含有6到14个碳原子的芳基,或者表示含有6到14个碳原子的未取代芳基或含有6到14个碳原子的取代芳基,所述取代基为一个或多个硝基,烷氧基或卤素基,X和X'相同或不同,分别为
氯,
溴,
氟或
碘。