SOLVENT-TYPE MAGNETIC INK CONTAINING CARBON-COATED MAGNETIC NANOPARTICLE, AND PROCESS FOR PRODUCING THE SAME

• Main Authors: ODELL PETER G, ALLEN C GEOFFREY, IFTIME GABRIEL, BRETON MARCEL P, VEREGIN RICHARD P N, SONG GUIQIN
• Format: Patent
• Language: English
• Published: 11.10.2012
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PREPARATION OF CARBON BLACK; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a MICR inkjet ink which does not spontaneously ignite, has a small diameter of the magnetic material, is improved in the dispersion and the dispersion stability of the magnetic pigment, and has a capability of maintaining excellent magnetic characteristics with a low particle loading amount.SOLUTION: The magnetic ink contains an organic solvent, an optional dispersant, an optional synergistic agent, an optional antioxidant, an optional viscosity controller, an optional coloring agent, an optional binder, and a carbon-coated magnetic nanoparticle containing a magnetic core and a carbon shell disposed thereon.