C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/685 (2006.01)
Patent
CA 2565857
A method for incorporating a nitrogen containing methine light absorbing compound into a polyester prepared using direct esterification of reactants selected form a dicarboxylic acid and a diol, the method comprising reacting the reactants in an esterifying reactor under conditions sufficient to form an esterified product including at least one of an ester, an oligomer, or mixture having an ester and a mixture of low molecular weight polyester, polymerizing the esterified product in a polycondensation reactor to form a polyester; and adding the light absorbing compound to the esterified products when at least 50% of the carboxy groups initially present in the reactants have been esterified. Articles utilizing the light protected polyester are additionally disclosed.
Il est prEvu un procEdE d'intEgration d'un composE absorbant la lumiEre de mEthine contenant de l'azote, dans un polyester fabriquE par estErification directe de rEactifs sElectionnEs parmi un acide dicarboxylique et un diol, le procEdE consistant A mettre en rEaction les rEactifs dans un rEacteur d'estErification, dans des conditions suffisantes pour former un produit estErifiE comportant au moins un ElEment parmi un ester, un oligomEre ou bien un mElange comportant un ester et un mElange de polyester de faible poids molEculaire; A polymEriser le produit estErifiE dans un rEacteur de polycondensation pour former un polyester; et A ajouter le composE absorbant la lumiEre aux produits estErifiEs lorsque l'on a estErifiE au moins 50 % des groupes carboxy initialement prEsents dans les rEactifs. Il est Egalement prEvu des articles utilisant le polyester protEgE de la lumiEre.
Howell Earl Edmondson Jr.
Murdaugh Perry Michael
Pearson Jason Clay
Weaver Max Allen
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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