Patent ID: 7781138

Claim:
A method for forming low melt polyester based toner, the method comprising: forming an emulsion resin comprising a branched amorphous polyester resin component and a crystalline polyester resin component; forming a pre-toner mixture by adding a colorant and optionally a wax to the emulsion resin; homogenizing the pre-toner mixture; aggregating the pre-toner mixture by adding an aggregating agent, thereby forming an aggregate mixture comprising a plurality of aggregate toner particles; adjusting the pH of the aggregate mixture to between about 5 and about 7; coalescing the aggregate mixture by heating the aggregate mixture to a temperature from about 5 to about 20° C. above the glass transition temperature of the branched amorphous polyester resin component, thereby generating a mixture of coalesced toner particles; and cooling the toner particles to room temperature.