| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for generally and easily analyzing the repeated structural unit composition of a urethane-based resin which may be cross-linked. SOLUTION: The urethane-based resin which may be cross-linked is reacted with a lower alcohol in supercritical state, and at least one low molecular weight material selected from the following group is detected to perform the structural analysis: Isocyanate, polyisocyanate, carbamate, polycarbamate, amine, polyamine, alkylated amine with lower alcohol, alkylated polyamine with lower alcohol, alcohol, polyol, ether, polyether, ester of carboxylic acid with lower alcohol, ester of polycarboxylic acid with lower alcohol, and lactone.</p> |
