Flame-retardant flexible polyurethane foam

Details Flame-retardant flexible polyurethane foam Flame-retardant flexible polyurethane foam

C - Chemistry, Metallurgy

08

K

C08K 5/5393 (2006.01) C08G 18/48 (2006.01)

Patent

CA 2609697

A flexible polyurethane foam-forming composition and the flexible polyurethane foam obtained therefrom contain, as flame-retardant additive, a halogen-free phosphonate compound which is substantially unreactive for isocyanate, contains at least about 5 weight percent phosphorus, has an acid value of about 2 mg KOH/g or less, a volatility as measured by thermogravimetric analysis not exceeding a 5.0 percent weight loss at a temperature of about 150 ~C, and a weight average molecular weight of from about 200 to about 2000.

L'invention concerne une composition formant une mousse de polyuréthane souple et la mousse de polyuréthane souple ainsi obtenue, lesquelles contiennent, comme additif ignifuge, un composé de phosphonate sans halogène sensiblement non réactif à l'isocyanate, au moins 5 % en poids de phosphore, présentent une valeur acide d'environ 2 mg KOH/g ou moins, une volatilité mesurée par analyse thermogravimétrique ne dépassant pas une perte de poids de 5,0 % à une température d'environ 150 °C et un poids moléculaire moyen pondéré en poids de 200 à environ 2000.

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