METAL COMPLEXES OF PHTHALIC ACIDS AND SALICYLIC ACIDS AS NEGATIVE CHARGE CONTROL ADDITIVES
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 with two ligands and a central metal as a charge additive. Toner compositions comprised of polymer, pigment or dye, and a negative metal complex charge enhancing additive containing an active component whose structure is believed to be essentially represented by the following formula (I): wherein M is a metal; N+ is the counter cation; R and R are substituents such as alkyl, alkoxy, aryloxy, halogen, carbonyl group, alkoxycarbonyl group, amino group, nitro group or mixtures thereof, and the like; m and n represent the number of R and R substituents, and can be a number of from 0 to 3; y-represents the negative charge magnitude of the cation and can be the numbers 1 or 2; and y' represents the number of counter cations N+.