Polyester polymer and copolymer compositions containing...

C - Chemistry – Metallurgy – 08 – K

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C08K 3/14 (2006.01) C08L 67/00 (2006.01)

Patent

CA 2585365

Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein titanium carbide particles that improve the reheat properties of the compositions. Processes for making such compositions are also disclosed. The titanium carbide particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable.

L'invention concerne des compositions de polyester qui comprennent des polymères ou des copolymères de polyester auxquels sont incorporées des particules de carbure de titane qui améliorent les propriétés de réchauffement desdites compositions. L'invention concerne également des procédés de production desdites compositions. Les particules de carbure de titane peuvent être incorporées dans le polyester par mélangeage à l'état fondu, ou peuvent être ajoutées à n'importe quel stade de la polymérisation, tel que lors de la phase de fusion de la polymérisation. Une gamme de granulométries peut être utilisée, ainsi qu'une gamme de distributions granulométriques. Lesdites compositions de polyester sont appropriées pour être utilisées dans des emballages fabriqués à partir de procédés dans lesquels une étape de réchauffement est souhaitable.

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