Liquid toners for use with perfluorinated solvents
AssigneeMinnesota Mining and Manufacturing Company
InventorPrabhakara S. Rao
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Abstract
An electrostatic liquid toner imaging process uses a liquid toner comprises a perfluorinated solvent and polymer resin-bound pigment particles. The polymer resin is preferably a resin containing highly fluorinated or perfluorinated units within the polymer resin or a resin comprising of at least 10% perfluorinated units, the rest comprising nonfluorinated units.
Claims14
A process of forming an ge comprising the
- a) providing a dielectric medium having at least one region of electrostatic charge,
- b) intimately contacting the dielectric medium with a liquid toner having a highly fluorinated solvent and polymer resin-bound pigment particles, and
- C) depositing said toner in a pattern corresponding to the electrostatic charge on the dielectric medium.
A liquid toner composition comprising an organic, fluorinated carrier liquid, a polymeric resin and a pigment, wherein said pigment is in intimate association with said polymeric resin, and wherein said polymeric resin is a polymer or copolymer of one or more highly fluorinated free-radically polymerizable monomers.
A process for forming an emulsion of a hydrocarbon polymer stabilized by a fluorocarbon shell in a highly fluorinated solvent, said process comprising the steps of:
- 1) combining at least one free radically polymerizable monomer in a highly fluorinated solvent, with a macromer soluble in said highly fluorinated solvent, and a second monomer capable of free radical polymerization and having at least one group thereon which can sequester a metal cation,
- 2) emulsifying said monomers in said highly fluorinated solvent, and
- 3) free radically polymerizing said monomers in the presence of a metal cation charging agent.
Dependencies are inferred from the claim text.