New UV-curable cyclotriphosphazenes as fire-retardant coating materials for wood

Abstract

A series of (2-hydroxyethylmethacrylate)( n-propoxy)cyclotriphosphazenes (HPCP) has been prepared by the reaction of N 3 P 3 Cl 6 with n-propanol and 2-hydroxyethylmethacrylate (HEMA) sequentially in the appropriate solvents. These phosphazene compounds are characterized by a combination of Fourier transform infrared, ultraviolet, and nuclear magnetic resonance spectroscopies. 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 HPCP-coated woodblocks were transparent and had a fire-retardant property, which has been ascribed to the intumescent behavior during the burning process.

Thermal degradation and combustion of a novel UV curable coating containing phosphorus

“…Phosphorus-containing monomers/oligomers used as flame retardants for UV curable systems have drawn much attention [8][9][10][11]. Their main advantages are low toxicity and the absence of dioxin and halogen acids, as well as the low evolution of smoke in the case of fire.…”

Progress in Research on Fire Retardant–Treated Wood and Wood-Based Composites: A Chinese Perspective

“…Among the different techniques available for surface treatment and protection, the fire retardant-coating method has been commonly used to enhance the fire retardancy of wood (Gu 1996, Chen-Yang et al 1998. Work conducted recently suggests that the use of intumescent fire-retardant coatings may be one of the easiest, most economical, and efficient ways to protect wood against fire (Zheng 2004;Huang 2005;Zhou 2006;Chou et al 2009Chou et al , 2010.…”

Environmentally friendly flame-retardant textiles

“…Several reactivetype fl ame-retardant monomers and oligomers used in radiation-curable coating formulations are reported in the literature. [80][81][82][83][84][85][86] Many processes for the radiation treatment of natural polymers, though known for a long time, have not yet been commercialised, either because of the high cost of irradiation (high dose) or because of the reluctance on the part of the industry to adapt to the radiation technology. 87 …”