NEW UV-CURABLE CYCLOTRIPHOSPHAZENES AS FIRE-RETARDANT COATING MATERIALS FOR WOOD

A series of yethylmethacrylate)(n-propoxy)cyclotriphosphazenes (HPCP) has been prepared by the reaction of N3P3Cl6 with n-propanol and 2-hyd roxyethylmethacrylate (HEMA) sequentially in the appropriate solvents. These phosphazene compounds are characterized by a combination of Fou rier transform infrared, ultraviolet, and nuclear magnetic resonance s pectroscopies. It was found that the compounds were soluble in most of the organic solvents, exhibited an absorption between 207-216 nm, and were curable by UV irradiation. After curing, the surfaces of the HPC P-coated woodblocks were transparent and had a fire-retardant property , which has been ascribed to the intumescent behavior during the burni ng process. (C) 1998 John Wiley & Sons, Inc.