C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/04 (2006.01) C08L 23/14 (2006.01) C08L 23/08 (2006.01)
Patent
CA 2400344
Unique blends of metallocene ctalyzed pomyers are disclosed. The blends of the invention include a first polyethylene having a narrow molecular weight distribution and a narrow composition distribution breadth index (CDBI), and a second polyethylene having a relatively broad molecular weight distribution and a very narrow CDBI. The blend is advantageously used when it includes 50 percent or greater of the first polyethylene and 50 percent or less of the second polyethylene. Blown film made from the blend will have an unexpectedly good set of optical properties.
L'invention concerne des mélanges uniques de polymères catalysés par un métallocène. Les mélanges de l'invention comprennent un premier polyéthylène possédant une répartition étroite de poids moléculaire et un indice étroit de largeur de distribution de composition (CDBI), et un second polyéthylène possédant une distribution de poids moléculaire relativement large et un CDBI très étroit. Ledit mélange est avantageusement utilisé lorsqu'il comprend 50 % ou plus du premier polyéthylène, et 50 % ou moins du second polyéthylène. Le film soufflé produit à partir du mélange présente un ensemble de propriétés optiques étonnamment bonnes.
Borden Ladner Gervais Llp
Univation Technologies Llc
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