Liquid toners with hydrocarbon solvents
AssigneeMinnesota Mining and Manufacturing Company
InventorsPrabhakara S. Rao, Valdis Mikelsons
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Abstract
The toner particles of this invention comprise pigment and a resin. The resin comprises a novel polymer formed from ethylenically unsaturated monomers, macromeric moieties that render the resin dispersible in hydrocarbon solvents, and a surface-release promoting moiety. When used for toner particles the polymer further comprises charge directing chelating moieties. The toner particles also include a charge director, preferably a metal cation. The toner particles, when dispersed in a carrier liquid, are useful as liquid toners for electrographic or electrophotographic processes.
Claims21
A toner particle comprising a pigment, a resin, and a charge director wherein the resin comprises
- A) a polymer formed from ethylenically unsaturated monomers,
- B) macromeric moieties grafted to the polymer wherein the macromeric moieties render the resin dispersible in hydrocarbon solvents,
- C) surface-release promoting moieties wherein the surface-release promoting moieties comprise silicon atoms or fluorine atoms, the surface-release promoting moieties are grafted to the macromeric moieties and comprise less than 10% by weight of the macromeric moiety, and
- D) charge directing chelating moieties, wherein the charge directing chelating moieties are either grafted to the polymer formed from ethylenically unsaturated monomers or to the macromeric moieties.
Dependencies are inferred from the claim text.