| 摘要 |
A NON-ERASABLE INK COMPOSITION SUITABLE FOR USE IN WRITING INSTRUMENTS IS DESCRIBED COMPRISING AN ISOCYANATE FIVE THERMOPLASTIC POLYURETHANE RESIN, A COLORANT AND AN ORGANIC SOLVENT. THE INK COMPOSITION MAY ALSO INCLUDE A SECOND RESIN, PLASTICIZERS, ANTIOXIDANTS, CORROSION INHIBITORS, LUBRICANTS, CHEMICAL DISPERSANTS, AND SURFACTANTS. THE INKS OF THE PRESENT INVENTION EXHIBIT A SMOOTH WRITING PERFORMANCE AND NON-SEEPAGE.
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