Patent ID: 9195155
Filing Date: 2015-11-24
Classification: G03G

Abstract:
1. A method for preparing a toner, comprising: aggregating a mixture comprising a bio-based resin and an optional wax to form aggregated particles; freezing aggregation of particles by adjusting the pH of the aggregated particles to a freezing aggregation pH of from about 5 to about 9; coalescing the aggregated particles to form toner particles at a second pH of from about 6.5 to about 8 and subsequently increasing the pH to a first pH of from 8 to 13, wherein the first pH is from about 0.2 pH unit to about 2 units higher than the freezing aggregation pH; and recovering the toner particles; wherein the average circularity of the toner particles is from about 0.940 to about 0.990.