| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a printing ink composition for a laminate which has excellent adhesiveness and processing adaptability for boiling and the like, and is alcohol-soluble. <P>SOLUTION: The ink composition including a colorant, a solvent, and a binder composed of 80 to 98% by weight of a polyurethane resin, 0.5 to 5% by weight of a cellulose acetate alkylate resin and 1.0 to 15% by weight of a polyvinyl butyral resin, based on the solid content, in which composition the polyurethane resin is obtained by reacting a reaction product between (A) a polyether diol compound having an Mn of 1,000 to 5,000, or a mixture of the compound and a polyester diol having an Mn of 1,000 to 5,000, and (B) a diisocyanate compound, with (C) a hydroxydialkylamine having a molecular weight of 50 to 300 and having one hydroxy group in a molecule, and further reacting the product with (D) a chain extending agent; and a molar ratio of the OH group of the component (C) to the NCO group of the component (B) is 0.05 to 0.35, is prepared and used. <P>COPYRIGHT: (C)2011,JPO&INPIT |
