Patent ID: 7897318
Filing Date: 2011-03-01
Classification: G03G

Abstract:
1. A process for producing a toner particulate composition comprising: (a) forming an aqueous dispersion comprising aggregates of polymer binder and colorant stabilized by an anionic surfactant and a cationic polymer flocculant containing a plurality of cationic functional groups; (b) adjusting the pH of said dispersion to a value of greater than 7.0 to configure said cationic polymer flocculant into a random coil configuration and mixing; (c) adjusting the pH of said dispersion to a value of greater than or equal to 4.0 and less than 7.0 to configure said cationic polymer flocculant into a relatively extended chain configuration wherein said plurality of cationic functional groups become available to promote flocculation and particle growth of said aggregates to a desired size; and (d) heating to a temperature above a glass transition temperature of said polymer binder and collecting particulate.