Patent ID: 7687215

Claim:
A process of making toner comprising: a) mixing a styrene butadiene binder, at least one colorant and at least one embrittling agent to form a mixture, the embrittling agent consisting of a modified or unmodified hydrocarbon resin selected from the group consisting of: a phenol-modified hydrocarbon resin in flaked form having a softening point of 140° C., a specific gravity at 25° C. of 1.078, a color Gardner of 12, an acid number of <1, a flash point ° F. of 520, an iodine number of 130, a viscosity at 25° C. of 6 Pa·s as determined in accordance with ASTM D-1545, a hydroxyl value of 39 and a number average molecular weight of 655, and a thermoplastic hydrocarbon resin in flaked form manufactured by polymerization of cycloaliphatic and alkyl aromatic monomers and having a softening point of 120° C., a density at 25° C. of 1.06 g/cm 3 , a color Gardner of 8.5, an iodine number of 39, and an acid value of <1; b) extruding the mixture; and c) grinding the extruded mixture to form toner particles having an average particle size of from about 3 microns to about 13 microns.