| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a printing ink binder using a printing ink resin excellent in boiling/retorting suitability even in a one-pack ink and printability, above all a polyurethane resin useful as a binder of a gravure printing ink and a flexographic printing ink. <P>SOLUTION: The printing ink binder is a polyurethane resin obtained by reacting (A) a polymer polyol having a number average molecular weight of 4,000-10,000, (B) a low-molecular weight triol having a molecular weight of less than 500, (C) an organic diisocyanate, and (D) a chain extender in a mass ratio of (A) to (B) of 99.9:0.1 to 99:1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
