| 摘要 |
<p>PURPOSE:To obtain a marking ink compsn. which can be used for writing on a flat impermeable surface and is excellent in erasability of written lines after aging by compounding at least a pigment, an org. solvent, a specific resin, a fatty acid ester (deriv.), and a specific compd. CONSTITUTION:A marking ink contains at least a pigment, an org. solvent (e.g. ethanol and isopropanol), a resin sol. in the solvent (e.g. polyvinyl butyral), a fatty acid ester (deriv.) (e.g. isopropyl myristate), and a sulfuric, acetic, or phosphoric ester of a polyoxyalkylene alkyl ether or its salt (e.g. sodium sulfate ester of polyoxyethylene-polyoxypropylene cetyl ether).</p> |
