Eastman-kodak Company

David E Tyminski

Dinesh Tyagi

Domenic Santilli

Leo G Proctor

A nonconductive toner composition comprising monodisperse spherical particles includes a binder polymer, a charge control agent, and an aliphatic acid or aliphatic amide uniformly distributed in the particles and present in an amount of 2.5 to 30% by weight of the toner composition. A method of forming a toner particle composition comprises the steps of: milling an aliphatic amide or an aliphatic acid in the presence of a binder polymer and a water-immiscible organic binder solvent to form a concentrate wherein the particle size of the aliphatic amide or aliphatic acid is less than one micrometer; dissolving a binder polymer and a charge control agent in a water-immiscible organic binder solvent to form a binder solution; mixing the aliphatic amide or aliphatic acid concentrate with the binder solution to form an aliphatic amide- or aliphatic acid-binder polymer dispersion; dispersing the aliphatic amide- or aliphatic acid-binder polymer dispersion in water containing a colloidal stabilizer to form an aqueous suspension of droplets; subjecting the droplets to shearing action to reduce droplet size and form limited coalescence particles; removing the water-immiscible organic binder solvent from the limited coalescence particles to form toner particles in an aqueous medium; and drying the toner particles.

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Webster, NY, United States of America

David E Tyminski