Polyester compositions containing near infrared absorbing...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 101/12 (2006.01) B29C 49/00 (2006.01) C08K 5/00 (2006.01) C08K 5/34 (2006.01) C08L 67/02 (2006.01) B29C 35/02 (2006.01)

Patent

CA 2267907

The present invention relates to a container preform comprising a polymer suitable for the production of a stretch blow molded bottle and at least one organic or metallated organic near infrared absorbing compound which absorbs at least twice as much light between about 700 nm and about 1200 nm as between about 400 nm and about 700 nm, wherein said near infrared absorbing compound is present in an amount sufficient to improve reheat rate of said preform. Suitable near infrared absorbing compounds include phthalocyanines, 2,3- napthalocyanines, squaraines (squaric acid derivatives), croconic acid derivatives, substituted indanthrones and certain highly substituted anthraquinones. A process for improving the reheat rate of a container preform is also disclosed.

La présente invention concerne une préforme de récipient comprenant un polymère apte à la production d'une bouteille moulée étirée par soufflage et au moins un composé organique ou organométallique absorbant dans le proche infrarouge ayant un coefficient d'absorption double dans les valeurs de longueur d'onde comprises entre environ 700 et 1200 nanomètres et entre environ 400 et environ 700 nanomètres lorsque ledit composant absorbant infrarouge est présent en quantité suffisante dans ledit composé pour améliorer le coefficient de réchauffement de ladite préforme. Les composés absorbant dans le proche infrarouge comprennent des phtalocyanines, 2,3-naphtalocyanines, squaraines (dérivés de l'acide squarique), des dérivés d'acide croconique, des indanthrones substituées et certaines anthraquinones hautement substituées. L'invention décrit également un procédé pour améliorer le coefficient de réchauffement d'une préforme de récipient.

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