Charge control agent and toner for electrostatic image...

Details Charge control agent and toner for electrostatic image... Charge control agent and toner for electrostatic image...

G - Physics

03

G

G03G 9/097 (2006.01)

Patent

CA 2507010

The charge control agent comprises aggregate particles including an azo-type iron complex salt represented by the following chemical formula [VI] (see formula VI) wherein B+ is (H+)x(Na+)1-x and x is the mole ratio and ranges from 0.6 <= x <= 0.9, or B+ is (H+)y(Na+)1-y and y is the mole ratio and ranges from 0 < x<= 0.2 and the aggregate particles have 0.5 to 5.0 microns of an average particle size. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent. An image formation process of electrophotography comprises a step for developing an electrostatic latent image on an electrostatic latent image frame by a developer including the toner.

L'invention concerne un agent de contrôle de charge électrique qui comprend des agglomérats renfermant un sel de complexe de fer de type azo représenté par la formule générale [VI]. Dans cette formule, B<+> est (H<+>)x (Na<+>)1-x, sachant que x = 0,6 à 0,9, ou bien (H<+>)y (Na<+>)1-y, sachant que y = 0 à 0,2. Ces agglomérats ont un diamètre de particule moyen compris entre 0,5 et 5 mu m. L'invention concerne également un toner pour le développement d'une image électrostatique renfermant ledit agent et une résine pour le toner. L'invention concerne enfin un procédé de formation d'image électrostatique qui consiste à développer une image électrostatique latente avec un révélateur contenant le toner.

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