Impact-modified polyalkylene terephthalate/polycarbonate...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/00 (2006.01)

Patent

CA 2719530

The present invention relates to compositions comprising A) aromatic polycarbonate, B) polyalkylene terephthalate and C) a concentrate consisting of polyalkylene terephthalate and at least one compound selected from the group consisting of ortho-phosphoric acid, phosphorous acid, carboxylic acid esters of ortho-phosphoric acid and carboxylic acid esters of phosphorous acid, which compositions are distinguished by high melt stability, and to a process for the preparation of impact-modified polyalkylene terephthalate/polycarbonate compositions, wherein a concentrate of polyalkylene terephthalate with a phosphorus-containing additive is used.

La présente invention porte sur des compositions contenant A) un polycarbonate aromatique, B) un poly(téréphtalate d'alkylène) et C) un concentré constitué de poly(téréphtalate d'alkylène) et d'au moins un composé choisi dans le groupe consistant en l'acide orthophosphorique, l'acide phosphoreux, les esters d'acides carboxyliques de l'acide orthophosphoreux et les esters carboxyliques de l'acide orthophosphorique et les esters carboxyliques de l'acide phosphoreux, qui se caractérisent par une stabilité élevée à l'état fondu. L'invention porte également sur un procédé de préparation de compositions de poly(téréphtalate d'alkylène)/polycarbonate modifiées choc, par utilisation d'un concentré de poly(téréphtalate d'alkylène) et d'un additif contenant du phosphore.

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