Flame-retarding composition and process for the preparation...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 21/14 (2006.01) C08K 5/34 (2006.01) C08K 5/3492 (2006.01)

Patent

CA 2365173

Flame-retarding composition comprising: 10 - 90 wt. % melem, 0.01 - 30 wt. % melam, 0.01 - 15 wt. % melamine, 0.1 - 65 wt. % higher condensation products of melamine and/or melem, the volatiles content being lower than 3 wt. % and the sum of the individual components amounting to 100 wt. %. Also a process for the preparation of a flame-retarding composition comprising 10 - 90 wt. % melem, 0.01 - 30 wt. % melam, 0.01 - 15 wt. % melamine and 0.1 - 65 wt. % higher condensation products of melamine and/or melem, the volatiles content being lower than 3 wt. %, by heating melamine-containing starting product for more than 0.1 second, for example by passing it through a heating zone, at a temperature of 350 - 800 ~C and a pressure of between 1 KPa and 50 Mpa. The invention also relates to polymer compositions containing the flame-retarding composition.

Composition ignifugeante comprenant: 10 - 90 % en poids de melem, 0.01 - 30 % en poids de melam, 0.01 - 15 % en poids de mélamine, 0.1 - 65 % de produits de condensation supérieurs de mélamine et/ou de mélème, la teneur en composants volatils étant inférieure à 3 % en poids et la somme des composants séparés s'élevant à 100 % en poids. L'invention porte également sur la préparation d'une composition ignifugeante comprenant 10 - 90 % de melem, 0.01 - 30 % de melam, 0.01 - 15 % de mélamine et 0.1 - 65 % en poids de produits de condensation supérieurs de mélamine et/ou de melem, la teneur en composants volatils étant inférieure à 3 % en poids. On prépare ladite composition en chauffant un produit de départ contenant de la mélamine, pendant plus de 0,1 seconde, par exemple en le faisant passer dans une zone de chauffage, à une température de 350-800 ·C et à une pression comprise entre 1 Kpa et 50 Mpa. L'invention porte également sur des compositions polymères contenant la composition ignifugeante de l'invention.

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