Polyolefin compositions, articles made therefrom and methods...

C - Chemistry – Metallurgy – 08 – L

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C08L 23/04 (2006.01)

Patent

CA 2648470

The invention provides compositions for blow molding applications and other applications, where such compositions comprise a high molecular weight ethylene interpolymer and a low molecular weight ethylene polymer, and where the high molecular weight ethylene interpolymer has a density from 0.920 g/cm3 to 0.950 g/cm3, and an I2I from 0.05 to 1 dg/min, and where the low molecular weight ethylene polymer has density from 0.965 g/cm3 to 0.985 g/cm3, and an I2 from 600 to 2000 dg/min. The composition has a density from 0.950 g/cm3 to 0.970 g/cm3, and comprises greater from 45 to 80 weight percent of the high molecular component, and from 20 to 55 weight percent of the low molecular weight component, based on the sum weight of the high molecular weight component and the low molecular weight component. The invention also provides for methods of preparing said compositions and for articles prepared from the same.

La présente invention concerne des compositions destinées à des applications de moulage par extrusion-soufflage et autres applications. Lesdites compositions comprennent un interpolymère de l'éthylène à haut poids moléculaire et un polymère de l'éthylène à bas poids moléculaire, ledit interpolymère à haut poids moléculaire ayant une densité de 0,920 g/cm3 à 0,950 g/cm3 et un I2I de 0,05 à 1 dg/min et ledit polymère à bas poids moléculaire ayant une densité de 0,965 g/cm3 à 0,985 g/cm3 et un I2 de 600 à 2000 dg/min. Les compositions ont une densité allant de 0,950 g/cm3 à 0,970 g/cm3 et elles comprennent de 45 à 80 % en poids du composant à haut poids moléculaire et de 20 à 55 % en poids du composant à bas poids moléculaire, en se basant sur le poids total de ces deux composants. L'invention concerne également des procédés de préparation desdites compositions ainsi que des articles fabriqués à partir de ces compositions.

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