In this research long oil alkyd resin, and styrenated alkyd resin were made
flame retardant by the incorporation of (i) bis-pyridine bis-tribromopheno
xo copper (II) complex, and (ii) polydibromo-phenylene oxide (PDBPO). The f
ormer was synthesized in the laboratory, and the second one was obtained fr
om the decomposition of the complex. Both of these compounds exhibit very g
ood flame retardance effect when mixed with alkyd resins. Either of the add
itives is physically incorporated into the resins through grinding in a peb
ble 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% compl
ex addition to the resins. These additives affect the physical and the mech
anical properties of the paints when introduced at an amount of 8% either c
omplex or PDBPO. The complex did not affect the drying time of resins while
PDBPO increased the drying time of styrenated alkyd resin. Leveling and sa
gging are not affected in either case. The hardness was increased by the co
mplex, and was not significantly changed by PDBPO. However the impact stren
gth was decreased by either additive. The abrasion strength of long oil alk
yd resin was decreased by PDBPO, and it was increased in all other cases. (
C) 1999 Elsevier Science Ltd. All rights reserved.