Patent ID: 6221550
Filing Date: 2001-04-24
Classification: G03G

Abstract:
An electrostatographic toner composition comprising a thermoplastic polymeric binder and a charge control agent selected from the group consisting of 4H-pyran compounds represented by the following general structure: ##STR17##whereR.sup.1 and R.sup.2 are the same or different, each representing H or an alkyl, an aryl or a heterocyclic group, or R.sup.1 and R.sup.2 taken together may form a saturated hydrocarbon ring;R.sup.3 and R.sup.4 each represent an alkyl or an aryl group;X and Z are the same or different, each representing a cyano substituent, or an alkanoyl, an aroyl, an alkoxycarbonyl, an aryloxycarbonyl, an arylaminocarbonyl, or an alkylaminocarbonyl group.