FLAME RETARDANT AGENTS STABLE TO HYDROLYSIS, BASED ON AMMONIUM POLYPHOSPHATE

摘要

FLAME-RETARDANT AGENTS STABLE TO HYDROLYSIS, BASED ONAMMONIUM POLYPHOSPHATEABSTRACT OF THE DISCLOSUREA flame-retardant agent based on free flowing,pulverulent ammonium polyphosphate of the general formulaH(n-m)+2(NH4)mpn03n+1in which n stands for an integer with an average value ofabout 20 to 800 and the ratio of m/n is about 1, consistssubstantially ofa) about 75 to 99.5 mass % ammonium polyphosphate andb) about 0.5 to 25 mass % of a reaction product of apolyisocynate and a carbodiimidization catalyst, thepolycarbodiimide encapsulating the individual ammonium poly-phosphate particles.