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    Polyester polymer particles having a small surface to center viscosity gradient
    38.
    发明公开
    Polyester polymer particles having a small surface to center viscosity gradient 审中-公开
    具有从表面的低粘度梯度的聚酯树脂的核粒子

    公开(公告)号：EP2272887A3

    公开(公告)日：2012-03-21

    申请号：EP10012571.5

    申请日：2005-03-03

    申请人： GRUPO PETROTEMEX, S.A. DE C.V.

    发明人： Colhoun, Frederick Leslie ,  Ekart, Michael Paul ,  Jernigan, Mary Therese ,  Weinhold, Stephen

    IPC分类号： C08G63/185 ,  C08G63/183 ,  B65D1/02

    CPC分类号： C08G63/183 ,  B29B9/12 ,  B29C47/786 ,  B29C47/822 ,  B29K2067/00 ,  C08G63/181 ,  C08G63/185 ,  Y10T428/1352 ,  Y10T428/2982

    摘要： The present invention relates to polyester polymer particle having an intrinsic viscosity (It.V.), a surface, and a center, wherein the It.V. at the surface of the particle is less than 0.25 dL/g higher than the It. V. at the center of the particle. The polyester polymer particle is desirably crystalline to prevent the particles from sticking to each other while drying, and desirably contains less than 10 ppm acetaldehyde. A polyester container, preferably a preform or beverage bottle, is made by feeding crystallized polyester particles having an It.V. of at least 0.70 dL/g to an extrusion zone, melting the particles in the extrusion zone to form a molten polyester polymer composition, and forming a sheet or a molded part from extruded molten polyester polymer, wherein at least a portion of the polyester particles have an It.V. at their surface which does not vary from their It.V. at their center by more than 0.25 dL/g, and the particles have not been solid state polymerized. Such polyester compositions have an It.V. suitable for containers, yet lose less It.V. during melt processing than existing polyesters.

    摘要翻译： 本发明涉及一种具有以特性粘度（特性粘度），表面，和一个中心聚酯聚合物粒子，worin的特性粘度 在所述颗粒的表面比的It.V.高小于0:25分升/克 在颗粒的中心。 聚酯聚合物颗粒是理想的结晶，以防止颗粒粘附到海誓山盟而干燥，并且理想地包含小于10ppm的乙醛。 一种聚酯的容器，优选的预制件或饮料瓶，是由具有在特性粘度结晶聚酯颗粒供给由 的至少0.70分升/克，以在挤出区，熔融挤出区中的颗粒以形成熔融聚酯聚合物组合物，并形成片材或模制部件从挤出的熔融聚酯聚合物，worin至少所述聚酯颗粒的一部分 必须在特性粘度 在其表面不从他们的特性粘度变化 在超过0:25分升/克它们的中心，并且所述颗粒没有被固态聚合。 搜索聚酯组合物具有特性粘度 适合于容器，但输少特性粘度 比现有的聚酯在熔融加工期间。

    Polyester polymer particles having a small surface to center viscosity gradient
    40.
    发明公开
    Polyester polymer particles having a small surface to center viscosity gradient 审中-公开
    具有从表面的低粘度梯度的聚酯树脂的核粒子

    公开(公告)号：EP2272887A2

    公开(公告)日：2011-01-12

    申请号：EP10012571.5

    申请日：2005-03-03

    申请人： EASTMAN CHEMICAL COMPANY

    发明人： Colhoun, Frederick Leslie ,  Ekart, Michael Paul ,  Jernigan, Mary Therese ,  Weinhold, Stephen

    IPC分类号： C08G63/185 ,  C08G63/183 ,  B65D1/02

    CPC分类号： C08G63/183 ,  B29B9/12 ,  B29C47/786 ,  B29C47/822 ,  B29K2067/00 ,  C08G63/181 ,  C08G63/185 ,  Y10T428/1352 ,  Y10T428/2982

    摘要： The present invention relates to polyester polymer particle having an intrinsic viscosity (It.V.), a surface, and a center, wherein the It.V. at the surface of the particle is less than 0.25 dL/g higher than the It. V. at the center of the particle. The polyester polymer particle is desirably crystalline to prevent the particles from sticking to each other while drying, and desirably contains less than 10 ppm acetaldehyde. A polyester container, preferably a preform or beverage bottle, is made by feeding crystallized polyester particles having an It.V. of at least 0.70 dL/g to an extrusion zone, melting the particles in the extrusion zone to form a molten polyester polymer composition, and forming a sheet or a molded part from extruded molten polyester polymer, wherein at least a portion of the polyester particles have an It.V. at their surface which does not vary from their It.V. at their center by more than 0.25 dL/g, and the particles have not been solid state polymerized. Such polyester compositions have an It.V. suitable for containers, yet lose less It.V. during melt processing than existing polyesters.

    摘要翻译： 本发明涉及一种具有以特性粘度（特性粘度），表面，和一个中心聚酯聚合物粒子，worin的特性粘度 在颗粒的表面比在颗粒的中心的它。V.更高小于0:25升/克。 聚酯聚合物颗粒是理想的结晶，以防止颗粒粘附到海誓山盟而干燥，并且理想地包含小于10ppm的乙醛。 一种聚酯的容器，优选的预制件或饮料瓶，是由具有在特性粘度结晶聚酯颗粒供给由 的至少0.70分升/克，以在挤出区，熔融挤出区中的颗粒以形成熔融聚酯聚合物组合物，并形成片材或模制部件从挤出的熔融聚酯聚合物，worin至少所述聚酯颗粒的一部分 必须在特性粘度 在其表面不从他们的特性粘度变化 在超过0:25分升/克它们的中心，并且所述颗粒没有被固态聚合。 搜索聚酯组合物具有特性粘度 适合于容器，但输少特性粘度 比现有的聚酯在熔融加工期间。