Bis-o-aminophenols, which carry on at least one of their hydroxyl groups a tert-butoxy-carbonyl group, can be reacted with dicarboxylic acids to give the corresponding poly-o-hydroxyamides. Following cyclization to the polybenzoxazole, these polymers have a lower dielectric constant than compounds prepared from corresponding poly-o-hydroxyamides which do not carry any tert-butoxycarbonyl group.
双邻
氨基苯酚至少有一个羟基上带有叔丁氧羰基,可与二
羧酸反应生成相应的聚邻羟基酰胺。在环化成聚
苯并恶唑后,这些聚合物的介电常数低于由不含任何叔丁氧羰基的相应聚邻羟酰胺制备的化合物。