Toners and developers containing quaternary ammonium 3,5-di-tertiary-alkyl-4-hydroxybezenesulfonate salts as charge-control agents

A dry, particulate electrostatographic toner composition comprising a polymeric binder and a charge-control agent comprising a quaternary ammonium salt having the structure:

• ##STR4## wherein R.sup.1 and R.sup.2 are tertiary-alkyl containing from 4 to 8 carbon atoms;
• R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same or different and are independently selected from an unsubstituted alkyl group having from 1 to 24 carbon atoms;
• a substituted alkyl group having from 1 to 24 carbon atoms substituted with one or more hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, nitro-, cyano-, keto- or halo-groups;
• a cycloalkyl group having from 3 to 7 carbon atoms;
• an unsubstituted aryl group having from 6 to 14 carbon atoms;
• a substituted aryl group having from 6 to 14 carbon atoms substituted with one or more hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo-groups;
• an alkaryl group having from 1 to 20 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group;
• an aralkyl group having from 1 to 4 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group wherein the aryl group is unsubstituted or substituted with one or more alkyl-, hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo- groups;
• or wherein any two or more of R.sup.3, R.sup.4, R.sup.5 or R.sup.6 can be interconnected to one another to form a 5 to 14 membered saturated or unsaturated ring system.