Bis(2-aminophenol)s (8)

Bis(2-aminophenol) is an aromatic diamine essential for synthesizing polybenzoxazole (PBO) polymers. It reacts with dicarbonyl compounds to form the benzoxazole rings that define PBO polymers. These diamines impart exceptional thermal stability and mechanical strength to the resulting polymers. Due to their outstanding properties, PBO polymers are extensively utilized in aerospace and high-performance textile applications. Typically, bis(2-aminophenol) is synthesized through the condensation of phenol and ammonia in the presence of a catalyst.