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US 2013/0280651 A1Published application
Toner compositions
AssigneeXerox Corporation
InventorsRobert D. Bayley, Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Daniel W. Asarese
Life of this patent
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Abstract
A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.
Claims20
A process for producing toner comprising:
- adding an optional colorant and an optional wax to an emulsion comprising at least one resin to form particles;
- aggregating the particles to form aggregated particles;
- coalescing the aggregated particles to form toner particles;
- dispersing the toner particles in water to form a toner slurry;
- adding a dispersion to the toner slurry, the dispersion comprising one or more charge control agents;
- heating the toner slurry to above a glass transition temperature of the toner particles while mixing;
- cooling the toner slurry while mixing;
- and
- washing the toner slurry to recover the toner particles.
6 more elements
A process for producing toner comprising:
- adding an optional colorant and an optional wax to an emulsion comprising at least one resin to form particles;
- aggregating the particles to form aggregated particles;
- coalescing the aggregated particles to form toner particles;
- dispersing the toner particles in water to form a toner slurry;
- adding a dispersion to the toner slurry, the dispersion comprising one or more charge control agents;
- heating the toner slurry to above a glass transition temperature of the toner particles while mixing;
- cooling the toner slurry while mixing;
- washing the toner slurry to recover the toner particles;
- and
- drying the recovered toner particles, wherein the one or more charge control agents remain adhered to the surface of the recovered toner particles.
7 more elements
Dependencies are inferred from the claim text.