| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a urethane-based coating material free from a solvent, having a low viscosity and having durability equal to that of a solvent-type coating material. <P>SOLUTION: The non-solvent type urethane-based coating material comprises a two-pack type urethane composition consisting of (A) a polyol comprising a polybranched polyether-polyol obtained by subjecting (a1) a hydroxyalkyloxetane and (a2) a monofunctional epoxy compound to ring-opening reaction as a main component, and (B) a polyisocyanate, and is regulated so that the mixed viscosity of the polyol (A) and the polyisocyanate (B) at 25°C is ≤1,000 mPa s. <P>COPYRIGHT: (C)2008,JPO&INPIT |
