Patent ID: 6265127
Filing Date: 2001-07-24
Classification: C07D,G03G

Abstract:
An electrostatographic developer comprising a dry mixture of from about 80 to about 99 percent by weight of carrier particles and from about 1 to about 20 percent by weight of negatively charging toner particles, which toner particles comprises a polymeric binder and an effective amount of a charge control agent for providing the particles with a negative triboelectric charge that is consistent with transfer to and from an electrostatic latent image, wherein the charge control agent has the following structure: ##STR59##where n is 1 or 2 and R.sup.1 and R.sup.2 may be the same or different and are H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted heterocyclic ring, or R.sup.1 and R.sup.2 taken together may form a saturated hydrocarbon ring system; with the proviso that when n is 2, R.sup.2 is a divalent substituted or unsubstituted cyclic or non-cyclic alkylene or substituted or unsubstituted arylene;R.sup.3 and R.sup.4 are independently alkyl or aryl;R.sup.5 is hydrogen, alkyl, or aryl;X and Z are the same or different and may be cyano, substituted or unsubstituted alkanoyl, substituted or unsubstituted aroyl, substituted or unsubstituted alkoxycarbonyl, substituted or unsubstituted phenoxycarbonyl, substituted or unsubstituted phenylaminocarbonyl, substituted or unsubstituted alkylaminocarbonyl; or X together with R.sup.3, and/or Z together with R.sup.4 may also form a ring system.