Flameproofed impact-resistance modified polycarbonate...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 69/00 (2006.01) C08F 283/12 (2006.01) C08K 5/34 (2006.01) C08K 5/523 (2006.01) C08L 51/08 (2006.01)

Patent

CA 2646725

The invention relates to impact-resistance modified polycarbonate compositions containing A) between 40 and 95 wt. parts of a branched aromatic polycarbonate and/or a branched aromatic polyester carbonate, B) between 1 and 25 wt. parts of a graft polymer containing at least one graft base (B.2) selected from the group of silicon rubbers (B.2.1) and silicon acrylate rubbers (B.2.2), C) between 9 and 18 wt. parts of talc, D) between 11 and 20 wt. parts of a flameproofing agent containing phosphorus, E) between 0 and 3 wt. parts of an anti-drip agent, and F) between 0 and 1.5 wt. parts of at least one thermoplastic vinyl(co)polymer F.1 and/or polyalkylene terephthalate F.2, said compositions meeting increased fire protection requirements. The invention also relates to a method for producing the compositions, to the use thereof for producing moulded bodies, and to thermoformed bodies that can be obtained from the above-mentioned compositions.

La présente invention concerne des compositions de polycarbonate à résilience modifiée contenant A) 40 à 95 parties en poids d'un polycarbonate aromatique ramifié et/ou d'un carbonate de polyester aromatique ramifié, B) 1 à 25 parties en poids d'un polymère greffé contenant une ou plusieurs bases de greffe (B.2) choisies dans le groupe comprenant les caoutchoucs de silicone (B.2.1) et les caoutchoucs de silicone/acrylate (B.2.2), C) 9 à 18 parties en poids de talc, D) 11 à 20 parties en poids d'un agent ignifuge phosphoré, E) 0 à 3 parties en poids d'agents anti-égouttement et F) 0 à 1,5 parties en poids d'un ou de plusieurs (co)polymères vinyliques thermoplastiques F.1 et/ou de téréphtalates de polyalkylène F.2. Ces compositions répondent à de hautes exigences en matière de protection contre l'incendie. L'invention concerne également un procédé de production de ces compositions, leur utilisation pour produire des corps façonnés, ainsi que des corps façonnés thermoformés pouvant être obtenus à partir de ces compositions.

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