Solvent-based inks comprising coated magnetic nanoparticles
AssigneeXerox Corporation
InventorsGabriel Iftime, Peter G. Odell, C. Geoffrey Allen, Marcel P. Breton, Richard P. N. Veregin
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Abstract
Solvent-based ink compositions which can be used for ink jet printing in a variety of applications. In particular, the present embodiments are directed to magnetic inks having desirable ink properties. The ink of the present embodiments comprise magnetic nanoparticles that are coated with various materials to prevent the exposure of the nanoparticles to oxygen, and provides robust prints.
Claims19
A non-aqueous magnetic ink comprising:
- an organic solvent carrier present in an amount of from about 10 to about 90 percent by weight of the ink;
- an optional dispersant;
- an optional synergist;
- an optional antioxidant;
- an optional viscosity controlling agent;
- an optional colorant;
- an optional binder;
- and
- coated magnetic nanoparticles, wherein the coated magnetic nanoparticles are comprised of a magnetic metal core and a protective coating disposed on the magnetic metal core, the coated magnetic nanoparticles being dispersed in the solvent carrier and further wherein the protective coating comprises a mixture of polymeric materials, inorganic oxides, and surfactants.
The ink according to claim , wherein the protective coating has a thickness of from about 0.2 nm to about 100 nm.
A non-aqueous magnetic ink comprising:
- a solvent carrier present in an amount of from about 10 to about 90 percent by weight of the ink;
- an optional dispersant;
- an optional synergist;
- an optional antioxidant;
- an optional viscosity controlling agent;
- an optional colorant;
- an optional binder;
- and
- coated magnetic nanoparticles comprising a magnetic metal core and a protective coating disposed on the magnetic metal core, the coated magnetic nanoparticles being dispersed in the solvent carrier and wherein the protective coating comprises a protective material comprising a mixture of polymeric materials, inorganic oxides, and surfactants and further wherein the protective coating has a thickness of from about 0.2 nm to about 100 nm.
A non-aqueous magnetic ink comprising:
- a solvent carrier present in an amount of from about 10 to about 90 percent by weight of the ink;
- an optional dispersant;
- an optional synergist;
- an optional antioxidant;
- an optional viscosity controlling agent;
- an optional colorant;
- an optional binder;
- and
- coated magnetic nanoparticles comprising a magnetic metal core and a protective coating disposed on the magnetic metal core, the coated magnetic nanoparticles being dispersed in the solvent carrier and the protective coating comprises a mixture of polymeric materials, inorganic oxides, and surfactants, and further wherein the ink is used for Magnetic Ink Character Recognition (MICR) applications.
Dependencies are inferred from the claim text.