| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyurethane-based ink binder for a decorative sheet having excellent durability including water resistance and moisture resistance, particularly suitable for an area exposed to water (cold or hot) and moisture (water vapor). <P>SOLUTION: The polyurethane-based ink binder contains a polyurethane resin obtained by reacting the following components (A) to (F), wherein the content of a cross-linking point derived from the component (C) in the polyurethane resin is 0.01-0.1 mmol/g: (A) a polycarbonate polyol having a number-average molecular weight of 500 to 5,000, (B) a low molecular weight diol having a molecular weight of less than 500, (C) a low molecular weight triol having a molecular weight of less than 500, (D) organic diisocyanate, (E) a low molecular weight diamine having a molecular weight of less than 500, and (F) an amino alcohol having a molecular weight of less than 500. <P>COPYRIGHT: (C)2010,JPO&INPIT |
