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    • 9. 发明授权
    • Process for preparing polyethylene naphthalate based polymers by using NDCA or its derivates
    • 通过使用NDCA或其衍生物制备聚萘二甲酸乙二醇酯基聚合物的方法
    • US06323305B1
    • 2001-11-27
    • US09589267
    • 2000-06-07
    • Hyun Nam ChoJae Min HongHyoung-Wook LeeYoung Chan KoIl Seok Choi
    • Hyun Nam ChoJae Min HongHyoung-Wook LeeYoung Chan KoIl Seok Choi
    • C08G6302
    • C08G63/78C08G63/189
    • The present invention provides a process for preparing polyethylene naphthalate polymers comprising: esterifying a slurry comprising NDCA or a dicarboxylic acid containing NDCA or derivatives thereof, and ethylene glycol or a glycol containing ethylene glycol or derivatives thereof to produce esterification compounds comprising bis (beta-hydroxyethyl) naphthalate or low molecular weight polymers thereof, wherein one or more primary alcohol is added to the slurry; and polycondensing the above resultant esterification compounds to produce polyethylene naphthalate polymers. The process of the present invention allows for the preparation of a slurry more easily and to maximize the manufacturing efficiency. Ultimately, it is possible to increase the productivity of the PEN polymers and to obtain high quality PEN since the method of the present invention has an effect of minimizing side products of the polymerization by reducing the amount of ethylene glycol considerably and of shortening the reaction time of the esterification reaction.
    • 本发明提供了一种制备聚萘二甲酸乙二醇酯聚合物的方法,包括:将包含NDCA或含有NDCA或其衍生物的二羧酸的淤浆和含乙二醇的乙二醇或其衍生物或其衍生物酯化,制备含有二(β-羟乙基 )萘二甲酸酯或其低分子量聚合物,其中将一种或多种伯醇加入到浆料中; 并缩聚上述所得酯化化合物以制备聚萘二甲酸乙二醇酯聚合物。 本发明的方法允许更容易地制备浆料并且最大化制造效率。 最终,可以提高PEN聚合物的生产率并获得高质量的PEN,因为本发明的方法具有通过显着减少乙二醇的量并缩短反应时间而使聚合的副产物最小化的效果 的酯化反应。