Flame retardant compositions comprising sterically hindered...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 3/34 (2006.01) C08K 3/32 (2006.01) C08K 5/00 (2006.01)

Patent

CA 2706745

The present invention relates to a novel method of flame retarding a polymeric substrate by adding a small but efficient amount of a synergistic mixture ofat least one sterically hindered N- alkoxyamine (NOR), at least a metal salt of hypophosphorous (phosphinic) acid and at least one organo-halogen flame retardant. A further aspect of the invention is the flame retardant composition itself and together with a polymer. The present invention also relates to polymeric articles (e.g. moldings, films, fibers, etc.) that are stabilized against light, heat and oxygen and made flame retardant by incorporation of at least one sterically hindered N- alkoxy amine, at least a metal salt of hypophosphorous acid (phosphinic acid) and at least one organo-halogen flame retardant.

La présente invention concerne un nouveau procédé permettant d'ignifuger un substrat polymère par addition d'une quantité faible mais efficace d'un mélange synergique d'au moins une N-alcoxyamine (NOR) à empêchement stérique, d'au moins un sel métallique d'acide hypophosphoreux (phosphinique) et d'au moins un ignifugeant organohalogéné. L'invention concerne en outre la composition ignifugeante elle-même et conjointement avec un polymère. La présente invention concerne également des articles polymères (par exemple des pièces moulées, des films, des fibres, etc.) qui sont stabilisés contre la lumière, la chaleur et l'oxygène et qui sont ignifugés par incorporation d'au moins une N-alcoxyamine à empêchement stérique, d'au moins un sel métallique d'acide hypophosphoreux (acide phosphinique) et d'au moins un ignifugeant organohalogéné.

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