Dry electrostatographic developer containing toner particles comprising a vinyl addition polymer containing a covalently bound quaternary phosphonium salt
 New electrostatographic developers are provided, containing dual function polymeric binder/charge agents. The new developers contain toner particles comprising a vinyl addition binder polymer containing a quaternary phosphonium salt, wherein the phosphonium salt has a cationic portion comprising a phosphorus atom covalently bonded to the binder polymer. 
Eastman Kodak Company
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Y10S Y10S G03G
additional additional inventional
Douglas E. Richard C. Lawrence P. John C. James H.
Bugner Sutton DeMejo Wilson Anderson