Synthesis of polyphosphate esters from pentaerythritol ester of phosphorochloridic acid and diols

Polyphosphate esters have been synthesized from reaction of the pentaerythritol ester of phosphorochloridic acid with different diols--bisphenol A, 1,6-hexanediol, 1,3-bis(4-hydroxybutyl)-tetramethyldisiloxane and 5-iodo-2'-deoxyuridine. All products are medium to high molecular weight. The product from bisphenol A gives fibers from concentrated solution. The product from 1,3-bis(4-hydroxybutyl)-tetramethyldisiloxane acts as an adhesive. The products were made for potential flame retardant applications in the electronics industry. The characterizations by MS, NMR and FT-IR are in agreement with the proposed structures.