Emulsion aggregation toner formulation

摘要

An emulsion aggregation toner formulation for electrophotography and a method for preparation thereof. The emulsion aggregation toner formulation includes a polyester resin emulsion formed using an extruded polyester binder resin having a broad molecular weight distribution. The extruded polyester binder resin is formed using a plurality of polyester binder resins. Further, the emulsion aggregation toner formulation comprises at least one colorant dispersion and a wax dispersion.

主权项

1. A method for preparing an emulsion aggregation toner formulation for electrophotography, the method comprising:
loading a plurality of pre-emulsified cross-linked polyester binder resins into an extruder and extruding the plurality of pre-emulsified cross-linked polyester binder resins together in their pre-emulsified state to break down the cross-links in the polyester binder resins and form an extruded polyester binder resin that is characterized by a cross-linked gel content of less than or equal to about 5 percent by weight of the extruded polyester binder resin and has a broader molecular weight distribution than the pre-emulsified polyester binder resins; after extruding the plurality of pre-emulsified cross-linked polyester binder resins and forming the extruded polyester binder resin, preparing a polyester resin emulsion using the extruded polyester binder resin; and combining and agglomerating the prepared polyester resin emulsion with at least one colorant dispersion and a wax dispersion to form the emulsion aggregation toner formulation.