Advances in the Synthesis of Oligomer Epoxyphosphazenes with Reduced Inflammability

Major approaches to the synthesis of phosphazene-containing epoxide oligomers via the reactions of the functional derivatives of cyclophosphazenes with glycidol or epichlorohydrin as well as oxidation of double bonds in the organyl fragments linked to the phosphorus atoms have been considered. The main regulations of the mentioned processes have been compared and the possibilities to adjust the properties of the phosphazene-containing epoxide oligomers, which form fire-resistant or completely non-inflammable compositions upon curing with the agents commonly used with epoxy resins, have been shown.