C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/189 (2006.01) C08G 63/83 (2006.01) C08K 3/00 (2006.01) C08K 5/00 (2006.01) C08K 5/04 (2006.01)
Patent
CA 2166541
The present invention relates to a process for preparing poly(ethylene-2,6-naphtalene dicarboxylate) polymers wherein a low concentration of an alkali metal salt is present. More specifically, 15 ppm to 100 ppm of an alkali metal derived from an alkali metal salt is added in the melt polymerization reaction mixture during formation of such polymers. The polymers are useful in applications where improved hydrolytic stability at elevated temperatures and high humidity (> 50% relative humidity) are required.
Procédé de préparation de polymères de poly(éthylène-2,6-naphtalène dicarboxylate) faisant appel à une faible concentration de sel de métal alcalin. Plus spécifiquement, 15 à 100 ppm d'un métal alcalin dérivé d'un sel de métal alcalin sont ajoutées au mélange fondu de réaction de polymérisation pendant la formation desdits polymères. Lesdits polymères sont utiles pour des applications nécessitant une stabilité hydrolytique améliorée à des températures élevées et dans des conditions de forte humidité (50% d'humidité relative).
Sublett Bobby Jones
Trotter Jimmy Ray
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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