SYNTHESIS OP POLYMERIC POLYDIOXYARYLENE-PHOSPHONITRYLATES

摘要

Recently, In reports of mainly patent and advertisement nature [2 the practical value of the products of condensation of PNC's ofnvarious molecular weights with an excess of diatomic phenols was pointed out. In the presence of an excess of phenols all the chlorine atoms in the initial PNC's are replaced by ox aromatic residues;the products thus obtained are hardened either thermally or by using such hardeners as peripheral, hexamethylenetetramine, etc.