| 摘要 |
<p>PURPOSE:To provide an ink composition for dry offset printing, having excellent antigreasing property and fludidity, and good for practical printing, by using a urethane-modified resin and an organic titanate as essential components. CONSTITUTION:The objective ink composition is prepared by adding 0.5-50wt% (based on whole resin component) of a urethane-modified resin and 0.1-10wt% (based on the resin) of an organic titanate compound as a gelling agent e.g. tetraisopropyl(bisdioctylphosphite) titanate to the resin component, gelatinizing the mixture by stirring for 5-30min at room temperature -250 deg.C, and adding a colorant, wax, grease, drying agent, dispersant, etc. to the gelatinzied product. The urethane-modified resin used as a starting material can be obtained by the urethane-forming reaction of a hydroxyl-containing compound (e.g. phenolic resin) with an isocyanate compound.</p> |
