C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
403/9
C08K 5/51 (2006.01) C08K 5/34 (2006.01) C08K 5/52 (2006.01) C08L 23/12 (2006.01) C08L 101/00 (2006.01)
Patent
CA 1166795
A b s t r a c t There are described certain polymeric compositions which are rendered flame retarding, provide an incandescent char-forming crust, are not dropping and do not produce or emit toxic fumes; this is achieved by the addition, per 100 parts by weight of polymer, of 5-40 parts by weight of the reaction product between an acid of phosphorus and at least one hydroxyalkyl derivative of a-t least one compound selected from the group isocyanuric acid, melamine and urea, and, in a modified embodiment, in addition to the above indicated reaction product, of 5-30 parts by weight of a polymer of an ammonium poly- phosphate of formula (NH4PO3)n9 wherein n" is greater than 20. In a further modified embodiment there is added amine phosphate, such as the ortho- or pyrophosphate of melamine, in an amount of 1 - 10 parts by weight. The above mentioned reaction product comprises in its molecule the formula N-(R)n1 -O-P wherein R is at least one linear or branched alkylene- derivative, n' is comprised between 1 and 6, and P is tri- or pentavalent.
390211
Eigenmann Ludwig
Perley-Robertson Hill & Mcdougall Llp
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