Back to results
US 2012/0235075 A1Published application
Solvent-based inks comprising coated magnetic nanoparticles
AssigneeXerox Corporation
InventorsGABRIEL IFTIME, Peter G. Odell, C. Geoffrey Allen, Marcel P. Breton, Richard P. N. Veregin
Life of this patent
Estimating the term…
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 comprises magnetic nanoparticles that are coated with various materials to prevent the exposure of the nanoparticles to oxygen, and provides robust prints.
Claims20
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 deposited on the magnetic metal core, and further wherein the coated magnetic nanoparticles are dispersed in the solvent carrier.
6 more elements
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 deposited on the magnetic metal core, wherein the coated magnetic nanoparticles are dispersed in the solvent carrier and further wherein the ink is used for Magnetic Ink Character Recognition (MICR) applications.
6 more elements
A process for preparing a non-aqueous magnetic ink comprising:
- (a) preparing a solution by combining an organic solvent, an optional dispersant, an optional synergist, and an optional colorant;
- and
- (b) combining the solution of (a) with a coated magnetic nanoparticle comprising a magnetic core and a coating shell deposited on the magnetic core to form a magnetic ink, wherein the solvent carrier is present in an amount of from about 10 to about 90 percent by weight of the ink.
Dependencies are inferred from the claim text.