Flame - retardant agents stable to hydrolysis, based on...

Details Flame - retardant agents stable to hydrolysis, based on... Flame - retardant agents stable to hydrolysis, based on...

C - Chemistry, Metallurgy

08

K

117/48, 6/18.1

C08K 3/32 (2006.01) C08K 9/08 (2006.01) C08K 9/10 (2006.01) C08L 75/04 (2006.01) C09K 21/04 (2006.01)

Patent

CA 1258010

FLAME-RETARDANT AGENTS STABLE TO HYDROLYSIS, BASED ON AMMONIUM POLYPHOSPHATE ABSTRACT OF THE DISCLOSURE A flame-retardant agent based on free flowing, pul- verulent ammonium polyphosphate of the general formula H(n-m)+2(NH4)mPn03n+1 in which n stands for an integer with an average value of about 20 to 800 and the ratio of m/n is about 1, consists substantially of a) about 75 to 94.5 mass %, ammonium polyphosphate and b) about 0.5 to 25 mass % of a reaction product of a polyisocyanate and a polyhydroxy compound, the re- sulting polyurethane encapsulating the individual am- monium polyphosphate particles.

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