Flame retardant styrenic polymer compositions

Details Flame retardant styrenic polymer compositions Flame retardant styrenic polymer compositions

C - Chemistry, Metallurgy

08

K

C08K 5/523 (2006.01) C08K 5/00 (2006.01) C08K 13/02 (2006.01) C08L 25/04 (2006.01)

Patent

CA 2178211

The present invention relates to a styrenic polymer composition having a polymeric component and a flame retardant component, wherein the polymeric component is substantially oxygen-free, and wherein the flame retardant component is substantially halogen-free and comprises from 2 to 10 percent by weight (basted on the composition) of triphenylphosphate (TPP), and optionally, one or more of flame retardant additives such as red pbosphorus (P), ammonium polyphosphate (APP), melaminephosphate (MP), melaminecyanurate (MC), melaminepyrophosphate (MPP), resorcinol bis(diphenylphosphate) (RDP), magnesium hydroxide (MG), and a thermoplastic rubber (TPR) The resulting compositions are capable of attaining a 94-UL "V-2" flammability rating and of passing the requirements of IEC-65 while still retaining acceptable pbysical properties.

L'invention a pour objet une composition de polymère styrénique comprenant un composant polymérique et un composant ignifugeant. Le composant polymérique est quasiment exempt d'oxygène tandis que le composant ignifugeant quasiment exempt d'halogène comprend entre 2 et 10 % en poids (par rapport à la composition) de phosphate de triphényle (TPP). Ladite composition comprend éventuellement au moins un additif ignifugeant, par exemple du phosphore rouge (P), du polyphosphate d'ammonium (APP), du phosphate de mélamine (MP), du cyanurate de mélamine (MC), du pyrophosphate de mélamine (MPP), du bis(diphénylphosphate) de résorcinol (RDP), de l'hydroxyde de magnésium (MG), et un caoutchouc thermoplastique (TPR). La composition ainsi obtenue peut obtenir le classement d'ignifugation "V-2" selon 94 UL et répondre aux exigences de CEI-65, tout en conservant des propriétés physiques acceptables.

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