Compounds for obtaining polymeric flameproofing agents and the process for obtaining them, as well as the flameproofing agents thus obtained

摘要

New compounds are disclosed for obtaining novel polymeric flameproofing agents. The former are diphenols of the general formula: <IMAGE> (I) where n=0 or 2. The latter are aromatic polyphenylphosphonates having recurring units of the general formula: <IMAGE> (II) in which n equals 0 or 2, and are obtained by reacting (I) with phenylphosphonyl chloride. The latter are especially useful for the flameproofing of polyester and finished or shaped articles based on polyester.