Toner Composition

摘要

The invention provides a toner comprising a core comprising a first latex having a glass transition temperature from about 45° C to about 54° C; and a shell surrounding said core comprising a second latex having a glass transition temperature from about 55° C to about 65° C. The invention further provides a process comprising contacting a latex having a glass transition temperature from about 45° C to about 54° C, an aqueous colorant dispersion, and a wax dispersion having a melting point of from about 70°C to about 95°C to form a blend; mixing the blend with a coagulant; heating the mixture to form toner aggregates; adding a second latex having a glass transition temperature from about 55° C to about 65° C to the toner aggregates, wherein the second latex forms a shell over said toner aggregates; adding a base to increase the pH to a value of from about 4 to about 7; heating the toner aggregates with the shell above the glass transition temperature of the first latex and the second latex; and recovering a resulting toner.