| 摘要 |
<p>Polyesteramides produced by reacting in the first step an aromatic monoalkyl dicarboxylate with an aromatic diisocyanate in the presence or absence of one or more monoalkyl dicarboxylates and/or diisocyanates to produce an aromatic dialkyl diamidedicarboxylate of the formula: <IMAGE> (II) wherein R1 is alkyl; and R2 is a divalent aromatic residue, or a mixture of dialkyl diamidedicarboxylates containing the compound of the formula (II), and reacting in the second step the compound of the formula (II) or the mixture containing the compound of the formula (II) with one member selected from the group consisting of (a) one or more polyhydric alcohols, (b) one or more polyhydric alcohols and polyvalent carboxylic acids, and (c) one or more polyhydric alcohols and a linear polyester have improved heat resistance as well as excellent mechanical properties and can be used, e.g., for enamelled wire.</p> |
