Flame-retardant, impact-resistant modified polyalkylene...

C - Chemistry – Metallurgy – 08 – K

Patent

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C08K 5/00 (2006.01) C08K 5/49 (2006.01) C08L 67/02 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2709951

The present invention relates to impact-modified polyalkylene terephthalate/polycarbonate compositions comprising A) 41 to 97 parts by wt. (in each case based on the sum of the parts by weight of components A+B+C+D) of aromatic polycarbonate, B) 2 to 19 parts by wt. (in each case based on the sum of the parts by weight of components A+B+C+D) of polyalkylene terephthalate, C) 0.5 to 15 parts by M. (in each case based on the sum of the parts by weight of components A+B+C+D) of rubber-modified graft polymer, D) 0.5 to 25 parts by wt. (in each case based on the sum of the parts by weight of components A+B+C+D) of a salt of a phosphinic acid, which are distinguished by an optimum combination of high heat distortion point, good flameproofing and excellent mechanical properties (in particular high E modulus), the use of the polycarbonate compositions for the production of shaped articles and the shaped articles themselves.

L'invention concerne des compositions de polyalkylène téréphtalate et de polycarbonate à résilience modifiée, contenant : A) 41 à 97% en poids (relativement à la somme des parts de poids des composants A+B+C+D) de polycarbonate aromatique ; B) 2 à 19% en poids (relativement à la somme des parts de poids des composants A+B+C+D) de polyalkylène téréphtalate ; C) 0,5 à 15% en poids (relativement à la somme des parts de poids des composants A+B+C+D) de polymérisat greffé à modification caoutchouc ; D) 0,5 à 25% en poids (relativement à la somme des parts de poids des composants A+B+C+D) d'un sel d'un acide phosphinique. Ces compositions se distinguent par une combinaison optimale d'une thermostabilité élevée, d'une ignifugation satisfaisante et d'excellentes propriétés mécaniques (module d'élasticité élevé notamment). L'invention concerne également l'utilisation des compositions de polycarbonate pour la fabrication de corps moulés, et les corps moulés eux-mêmes.

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