| 摘要 |
A process for the preparation of toner comprising: (i) preparing a pigment dispersion, which dispersion is comprised of a pigment, an ionic surfactant, and optionally a charge control agent; (ii) shearing said pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant; (iii) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution; (iv) heating said bound aggregates above about the Tg of the resin; and (v) thereafter washing the toner obtained, adding initiator, adding monomer, polymerizing by heating, and thereafter cooling, followed by an optional second washing.
|
