| 摘要 |
<p>A polyurethane resin is produced by reacting a polymeric diol such as a polyether diol, polyester diol, or mixtures thereof with a diisocyanate to form an isocyanate-terminated prepolymer. The prepolymer is then reacted with a diamine and can be followed by reaction with another amine or an alcohol. Clear solutions of the polyurethane resin are useful in formulating printing ink compositions, adhesives, and clear varnishes.</p> |
