Compositions and a method for improving reheat rate of pet...

B - Operations – Transporting – 29 – C

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B29C 45/00 (2006.01) C08G 63/00 (2006.01) C08J 5/00 (2006.01) C08L 67/00 (2006.01)

Patent

CA 2525562

A polyester composition, a preform, and a bottle, containing a polyester such as polyethylene terephthalate or polyethylene naphthalate and activated carbon to enhance the rate for reheating the composition is provided. Activated carbon may be added in the presence of active phosphorus containing compounds, or at any stage in the melt phase after prepolymerization and after the polyester polymer is solidified. Polyester concentrates containing activated carbon may be added to bulk polyesters to make preforms suitable for blowing into bottles.

L'invention concerne une composition de polyester, une préforme ainsi qu'une bouteille contenant un polyester tel que du polyéthylène téréphtalate ou du polyéthylène naphtalate et du charbon actif pour améliorer la vitesse de rechauffage de la composition. Le charbon actif peut être ajouté en la présence de composés contenant du phosphore actif ou à n'importe quel stade dans la phase de fusion après prépolymérisation et après la solidification du polymère de polyester. Des concentrés de polyester contenant du charbon actif peuvent être ajoutés à des polyesters de masse pour produire des préformes pouvant être soufflées en forme de bouteilles.

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