| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a binder for printing ink excellent in boiling, retort suitability, and printability even in one-part ink, especially the binder for printing ink using a polyurethane resin useful as a binder for gravure printing ink or flexographic ink. <P>SOLUTION: In the binder for printing ink, the polyurethane resin is obtained by reacting (A) a high-molecular polyol with a number average molecular weight of 5,000 to 10,000, (B) a low-molecular-weight polyol with a molecular weight of less than 1,000, (C) organic diisocyanate, and (D) a chain extender, and the weighted average value of the number average molecular weights of (A) and (B) is 4,500 to 8,000. <P>COPYRIGHT: (C)2011,JPO&INPIT |
