Flame retardant polyurethanes and additive compositions for...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08K 5/00 (2006.01) C08K 5/06 (2006.01) C08K 5/134 (2006.01) C08K 5/34 (2006.01) C08K 5/521 (2006.01) C08K 5/523 (2006.01)

Patent

CA 2511913

Provided are liquid flame retardant additive compositions fo low viscosity for use in flexible polyurethane foams. Preferred compositions are capable of minimizing, if not eliminating, visible scorching of the foam during its production. Flexible flame retardant polyurethane foams, and methods for their production are also provided. The flame retardant additive compositions are formed at least from a) at least one brominated aromatic diester diol; b) at least one substituted triphenylphosphate in which on average at least one phenyl group has an alkyl substituent; c) at least one hindered amine antioxidant; and d) at least one phenolic antioxidant in which the phenolic ring is substituted by an alkanoic acid alkyl ester group in which alkanoic acid moiety has in the range of 2 to 4 carbon atoms and the alkyl group has in the range of 6 to 16 carbon atoms.

L'invention concerne des compositions d'addition ignifugeantes liquides de faible viscosité destinées à être utilisées dans des mousses souples de polyuréthanne. Les compositions préférées sont capables de réduire au minimum et éventuellement d'éliminer le roussissement visible de la mousse durant sa production. L'invention concerne également des mousses souples de polyuréthanne ignifugées et leurs procédés de production. Les compositions d'addition ignifugeantes renferment au moins a) au moins un diol diester aromatique bromé ; b) au moins un triphénylphosphate substitué dans lequel au moins un groupe phényle en moyenne comprend un substituant alkyle ; c) au moins un antioxydant de type amine encombrée ; et d) au moins un antioxydant phénolique dans lequel le noyau phénolique est substitué par un groupe ester d'alkyle acide alcanoïque dans lequel le groupe fonctionnel d'acide alcanoïque comprend 2 à 4 atomes de carbone et le groupe alkyle comprend 6 à 16 atomes de carbone.

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