| abstract |
Flame retardant compositions comprising a poly(vinyl chloride) resin, a chlorinated poly(vinyl chloride) resin, or a mixture thereof; a polyhaloalkylphosphate and/or polyhaloalkylthiophosphate flame retardant of formula (I) in which M is sulfur or oxygen and X?1, X2, and X3¿ are each independently a halogen selected from the group consisting of chlorine and bromine; and a compatibilising agent (exudation inhibitor), are disclosed. Preferably the compositions comprise sufficient flame retardant and other halogenated additives to provide a composition whose halogen content is about 2.0 % by weight greater than that of the poly(vinyl chloride) resin, chlorinated poly(vinyl chloride) resin, or mixture thereof. These compositions can meet flame retardant standards using smaller quantities of flame retardant, thereby reducing the cost of the composition, and also be formulated so as to be easier to use in wire and cable manufacturing processes. |