Xerox Corporation

Jeffrey H Sokol

Hui Chang

Edward J Gutman

Joseph L Leonardo

Scott M Silence

Joo T Chung

James M Proper

John J Ianni

A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m /g of from about 35 to about 65, a bulk density, in grams/liter, of from about 40 to about 60, and and wherein the size diameter determined from the BET measurement is from about 20 to about 100 nanometers.

Toner compositions

A toner having a high colorant concentration and a binder resin that includes a polyester resin having linear portions and crosslinked portions of high density crosslinked microgel particles has a melt flow index value of about 11&plusmn;MFI units. The binder resin may also include a mixture of two polyester resins having different MFI values.

Toner binder of polyester having a high melt flow index and toners therefrom

A toner composition comprised of binder, colorant, and a surface additive of a coated silica and wherein said silica possesses a BET surface area, in m,/g of from about 35 to about 65, a bulk density, in grams/liter, of from about 40 to about 60, and wherein the size diameter determined from the BET measurement is from about 20 to about 100 nanometers.

Disclosed is an apparatus for obtaining toner particles with improved dispersion of additive components therein comprised of a toner extrusion device containing therein a blending chamber, a screw mixing means, a heating means, a toner supply means, and a means for injecting the additive components into the extrusion device enabling a decrease in the melting temperature of the toner resin particles contained therein.

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Pittsford, NY, United States of America

Jeffrey H Sokol