Electrostatographic dry toner and developer compositions with hydroxyphthalimide
AssigneeEastman Kodak Company
InventorsJohn C. Wilson, Steven M. Bonser, Hans W. Osterhoudt
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Abstract
N-hydroxyphthalimide as a charge-control agent for fusible, dry electrostatographic toners.
Claims19
Fusible, dry electrostatographic toner particles comprising a binder polymer and a charge-control agent wherein the binder polymer comprises a copolymer of styrene and an alkyl acrylate or methacrylate in which the styrene content is at least 60 weight percent of the total weight of the copolymer and the charge-control agent is N-hydroxyphthalimide.
A dry, electrostatographic developer composition comprising a mix of toner particles comprised of a binder polymer and a charge-control agent wherein the binder polymer comprises a copolymer of styrene and an alkyl acrylate or methacrylate in which the styrene content is at least 60 weight percent of the total weight of the copolymer and the charge-control agent is N-hydroxyphthalimide and carrier particles wherein each of the carrier particles comprises a core particle having an overcoat of a polymer comprising poly(methyl methacrylate) or a copolymer of p-t-butylstyrene and a C.sub.1 -C.sub.4 alkyl methacrylate.
Dependencies are inferred from the claim text.