Toner particles and methods of preparing the same

Details Toner particles and methods of preparing the same Toner particles and methods of preparing the same

G - Physics

03

G

G03G 9/08 (2006.01) G03G 9/10 (2006.01)

Patent

CA 2532398

Toner particles comprise resin, wax and optionally colorants, and the wax is substantially excluded from the interior core of the toner particles. Processes for preparing such toner particles comprise providing an aqueous dispersion of resin particles and optionally colorants, mixing the aqueous dispersion in presence of a coagulant, aggregating to form particles, coalescing to form fused particles, and removing the fused particles from the aqueous dispersion. Wax dispersions can be added either after mixing or during aggregation, so that wax is excluded from the core of the toner particles.

Particules de toner qui comprennent de la résine, de la cire et en option des colorants, la cire étant pratiquement exclue du noyau intérieur des particules de toner. Les procédés pour la préparation de telles particules de toner comprennent la préparation d'une dispersion aqueuse de particules de résine et, de manière optionnelle de colorants, le mélange de la dispersion aqueuse en présence d'un coagulant, l'agrégation permettant de former des particules, la coalescence pour former des particules fusionnées, et le retrait des particules fusionnées de la dispersion aqueuse. Les dispersions de cire peuvent être ajoutées soit après le mélange ou pendant l'agrégation, de manière à ce que la cire soit exclue du noyau des particules de toner.

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