Patent ID: 6476171
Filing Date: 2002-11-05
Classification: C08F,C08J,Y10S

Abstract:
A continuous gas phase process for the polymerization of ethylene and an alpha-olefin, the process comprising continuously circulating a feed gas stream comprising ethylene and at least one alpha-olefin having from 5 to 20 carbon atoms to thereby fluidize and agitate a bed of particles, adding metallocene catalyst to the fluidized bed, and removing polymer produced thereby, wherein the polymer produced has a melt index of from 0.1 to 15, a compositional distribution breadth index of at least 70%, a density of from 0.910 to 0.930 g/ml, a haze value of less than 20%, a melt index ratio of from 35 to 80, an averaged Modulus (M) of from 20,000 to 60,000 psi, and a relation between M and the dart impact strength in g/mil (DIS) complying with the formula:DIS&gE;0.8Ã—[100+e(11.71-0.000268Ã—M+2.183Ã—10âˆ’9Ã—M2)].