Effect of the metal on the mechanism of fire retardance in CHLOROPARAFFIN (cas 108171-26-2)-metal compound-polypropylene mixtures

Add time:08/25/2019    Source:sciencedirect.com

Antimony trioxide and bismuth compounds added to chloroparaffin-polypropylene mixtures display different fire retardant ‘synergistic’ mechanisms. Antimony-chlorine ‘synergism’ depends on SbCl3 evolved from the mixtures on heating, which is a much more efficient flame poison than HCl evolved from the chloroparaffin in the absence of Sb2O3. Bismuth-chlorine ‘synergism’ derives from a condensed phase mechanism which involves the reduction of the rate of pyrolysis of the polymer which supplies the fuel to the flame.

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