Electrostatographic developer mixture including a long chain...

Details Electrostatographic developer mixture including a long chain... Electrostatographic developer mixture including a long chain...

G - Physics

03

G

96/52

G03G 9/10 (2006.01) G03G 9/097 (2006.01) G03G 9/113 (2006.01)

Patent

CA 1147193

ABSTRACT OF THE DISCLOSURE An electrostatographic developer mixture comprising finely- divided positively charging toner particles electrostatically clinging to negatively charging carrier particles. The toner particles comprise a resin, a colorant, and a charge inducing material selected from (1) a long chain hydrazinium compound and (2) an alkyl pyridinium compound. The carrier particles comprise core particles having a coating of fused thermoplastic resin particles wherein the carrier particles are prepared by dry-mixing the core particles with thermoplastic resin particles until the resin particles adhere to the core particles. The mixture of core and resin particles are heated to between 320°F. and 650°F. for between 20 and 120 minutes so that the resin particles melt and fuse to the core particles. The developer mixture is employed to develop electrostatic latent images.

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