C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 3/08 (2006.01) C08G 63/85 (2006.01)
Patent
CA 2585493
Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein metallic titanium particles that improve the reheat properties of the compositions. Processes for making such compositions are also disclosed. The titanium 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 porte sur des compositions de polyester contenant des polymères de polyester ou des copolymères comprenant des particules de titane métalliques qui améliorent les propriétés de postcombustion des compositions. L'invention concerne aussi des procédés de fabrication de ces compositions. Les particules de titane peuvent être intégrées dans le polyester par mélangeage de fusion, ou peuvent être ajoutées à n'importe quel stade de la polymérisation, par exemple au cours de la phase de fusion de la polymérisation. Une gamme granulométrique peut être utilisée ainsi qu'une gamme de répartitions granulométriques. Ces compositions de polyester conviennent à l'emballage au moyen de procédés comprenant de préférence une étape de postcombustion.
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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