METAL COMPLEXES OF SALICYLIC ACIDS AND CATECHOLS AS NEGATIVE CHARGE CONTROL AGENTS
Original Publication Date: 1992-Dec-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
Disclosed is a negatively charged toner comprised of metal complexes based on metal complexes of salicylic acid and catechol with two ligands and a central metal, like aluminum, as a charge additive. Charge control agents based on metal complexes with salicylic acid are known (e.g. Bontron E-88), as are complexes based on catechol. The aluminum complex displays equivalent tribo charging to Bontron E-88 in an encapsulated toner. As a surface additive to a conventional toner the charge control agents exhibit superior admix properties to that of Bontron E-88.