Toner processes and compositions thereof
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United States of America Patent
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Jul 24, 2007
Grant Date -
Apr 13, 2006
app pub date -
Oct 12, 2004
filing date -
Oct 12, 2004
priority date (Note) -
Expired
status (Latency Note)
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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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