Eastman-Kodak Company

John M Spence

Dinesh Tyagi

Dennis E Smith

Thomas A Jadwin

Hans W Osterhoudt

Allan R Amering

Howard J Helenbrook

Michelle S Kwarta

A two component electrophotographic developer and development method. The developer includes carrier particles and toner comprising: polymeric binder; a first agent selected from the group consisting of compounds having the general structure: ##STR1## wherein n is from about 7 to about 21; R.sup.1 and R.sup.2 are each independently H or alkyl having from 1 to about 3 carbons; T represents an unshared electron pair or a proton and a counterion; and R.sup.3 is substituted or unsubstituted alkyl, alkylamide, aryl, or heteroaryl; and a second agent comprising quaternary ammonium salt.

Two component electrophotographic developers and preparation method

An electrophotographic dry toner having excellent properties with respect to charging, RH stability and fusing is made in a process in which the binder polymer is formed by suspension polymerizing a styrene-acrylic monomer mixture in the presence of a polyester-promoted colloidal silica suspending agent which is free of other hydrophilic polymers. The resulting polymer is melt blended with toner addenda such as a colorant and a charge control agent and the mixture is pulverized to form the toner composition.

Toner composition and method of making

A particulate electrophotographic toner includes a binder polymer having dispersed therein an amount, effective to control the charge on the toner particles, of a mixture of sodium dioctylsulfosuccinate and sodium benzoate.

Electrophotographic toner and developer compositions containing

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Pittsford, NY, United States of America

John M Spence