Patent ID: 7291437

Claim:
A toner process comprising mixing a colorant dispersion with a latex, a wax dispersion, and a single coagulant to form a mixture, wherein the coagulant is a polymetal halide, and wherein the polymer latex selected possesses a weight average molecular weight of from about 20,000 to about 55,000, a number average molecular weight of from about 5,000 to about 18,000, an onset glass transition temperature Tg of from about 40° C. to about 80° C., and a particle size distribution PSD of from about 50 to about 500 nanometers; heating the mixture at a first temperature which is below the glass transition temperature of the latex to bring about aggregation; heating the mixture at a second temperature which is above the glass transition temperature of the latex to enable coalescence; lowering the pH of the mixture from about 9 to from 5 to 6.5 by the addition of an acid, wherein the acid is nitric, sulphuric, hydrochloric, citric, or acetic acid; and cooling the mixture to about room temperature.