Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution

摘要

Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron bridged metallocene compound with a cyclopentadienyl group and an indenyl group, and a single atom bridged metallocene compound with a fluorenyl group.

主权项

1. An olefin polymer having a melt index of less than or equal to about 50 g/10 min, a ratio of Mw/Mn in a range from about 4 to about 20, a density in a range from about 0.90 g/cm3 to about 0.945 g/cm3, and a percentage of data points deviating from the average short chain branch content, determined over the range from D15 to D85, by greater than 1 short chain branch per 1000 total carbon atoms of less than or equal to about 10%.