Self-extinguishing polymeric compositions

Details Self-extinguishing polymeric compositions Self-extinguishing polymeric compositions

C - Chemistry, Metallurgy

08

L

400/5058

C08L 23/02 (2006.01) C08K 3/32 (2006.01) C08K 9/10 (2006.01)

Patent

CA 1281147

SELF-EXTINGUISHING POLYMERIC COMPOSITIONS ABSTRACT OF THE DISCLOSURE Self-extinguishing polymeric composition based on a polyolefin, especially polypropylene, of improved thermal stability containing an intumescent fire-retardant system comprised of a phosphorus constituent and a carbonaceous nitrogen constituent. The composition contains more par- ticularly, as the phosphorus constituent, a product con- sisting substantially of a) 75 - 99.5 wgt % pulverulent free flowing ammonium poly- phosphate of the following general formula H(n-m)+2(NH4)mPnO3n+1 in which n stands for an integer having an average value of from about 20 to 800 and the ratio of m/n is about 1, and b) about 0.5 - 25 wgt % of a water-insoluble, optionally cured artificial resin encapsulating the individual ammonium polyphosphate particles.

502034

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