The Reactions of Diaminotetraphenoxycyclotriphosphazene with Potassium Dihydrogen Phosphate and Boric Oxide, and Bonding Strength of the Product for Laminated Poly (vinyl chloride)

Abstract

Diaminotetraphenoxycyclotriphosphazen N₃P₃ (NH₂) ₂ (OC₆H₅) ₄ (APT) was prepared from the reaction of (NPCl₂) ₃ with ammonia and sodium phenoxide. APT was reacted with potassium dihydrogen phosphate, boric oxide or the compounds obtained from potassium dihydrogen phosphate and boric oxide at 170-250°C untill the amount of NH₃ gas attained to the steady state. The product was made up of [OP (O) -OK] _x, [NHN₃P₃ (OC₆H₅) ₄] _y, and (OBO) _z, units as shown by infrared, Raman and ¹H NMR spectroscopy, gel-permination chromatography and chemical analysis. Bonding strength of the product for laminated poly (vinyl chloride) increased with the increase of x in the product.