Toner processes and compositions thereof

Details Toner processes and compositions thereof Toner processes and compositions thereof

2007-07-24

2007-07-24

Chapman, Mark A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

C430S137100, C430S137180, C430S110100

Reexamination Certificate

active

10963088

ABSTRACT:
The invention relates to color toner compositions prepared from a process for the preparation of a dry toner powder from an aqueous pigment concentrate dispersion comprising: blending at least an aqueous-based pigment concentrate dispersion and a resin to produce a paste; charging the paste to an extruder to generate an extruded pigment/resin mixture; dispersing the extruded pigment/resin mixture in a low boiling organic medium to create an organic phase; dispersing the organic phase in an aqueous phase containing a particulate stabilizer and mixing the organic phase and the aqueous phase at elevated temperature and under shear force to form toner particles of a controlled size and shape; removing the organic solvent and particulate stabilizer from the formed particles; and washing, drying, and collecting the particles for use as a dry toner powder.

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