C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/88 (2006.01) C08G 63/189 (2006.01) C08G 63/80 (2006.01)
Patent
CA 2226876
A novel process has been developed for the crystallization of poly(ethylenenaphthalenedicarboxylate) (PEN) and its copolymers. The process comprises the step of maintaining the amount of water in said poly(ethylenenaphthalenedicarboxylate) below a critical moisture content ceiling throughout processing such that a separate drying step is not required.
La présente invention concerne un procédé de cristallisation du poly(éthylène-naphtalènecarboxylate) (PEN) et de ses copolymères. Ce procédé consiste à maintenir la quantité d'eau contenue dans le poly(éthylène-naphtalènecarboxylate) en dessous d'une teneur plafond d'humidité critique pendant toute la durée du traitement, de façon qu'il n'y ait besoin d'aucune opération spécifique de séchage.
Heise William Herbert
Howell Earl Edmondson Jr.
Knight Joseph Franklin
Williams Michael Alan
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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