| 摘要 |
<p>Disclosed is a coating agent for hand painting application comprising a urethane resin composition obtainable by reacting the following main agent (A) and curing agent (B), wherein the main agent (A) containing: an isocyanate group-terminated prepolymer (b) having diphenylmethane diisocyanate bound to the termini of a polyol component (a) containing a long chain polyol (e) which contains at least a polyhydroxy functional product such as a trihydroxy or higher-hydroxy functional product and has a molecular weight of 200 or greater and a short chain polyol (d) having a molecular weight of less than 200, and unbound diphenylmethane diisocyanate (c); and wherein the curing agent (B) containing: a crosslinking agent (g) obtained by a short chain polyol (f) having a molecular weight of less than 200, and a long chain polyol (h) having a molecular weight of 200 or greater.</p> |
