Flame retardant alkyd paint

In this research long oil alkyd resin, and styrenated alkyd resin were made flame retardant by the incorporation of (i) bis-pyridine bis-tribromophenoxo copper (II) complex, and (ii) polydibromo-phenylene oxide (PDBPO). The former was synthesized in the laboratory, and the second one was obtained from the decomposition of the complex. Both of these compounds exhibit very good flame retardance effect when mixed with alkyd resins. Either of the additives is physically incorporated into the resins through grinding in a pebble mill until all particulates have a. size below 10 mu m. An oxygen index value of 26 was achieved with about 6% by weight PDBPO, and about 2% complex addition to the resins. These additives affect the physical and the mechanical properties of the paints when introduced at an amount of 8% either complex or PDBPO. The complex did not affect the drying time of resins while PDBPO increased the drying time of styrenated alkyd resin. Leveling and sagging are not affected in either case. The hardness was increased by the complex, and was not significantly changed by PDBPO. However the impact strength was decreased by either additive. The abrasion strength of long oil alkyd resin was decreased by PDBPO, and it was increased in all other cases. (C) 1999 Elsevier Science Ltd. All rights reserved.