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METAL COMPLEXES OF SALICYLIC ACIDS AND CATECHOLS AS NEGATIVE CHARGE CONTROL AGENTS

IP.com Disclosure Number: IPCOM000026628D
Original Publication Date: 1992-Dec-31
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

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.