MULTI-METALLIC ZIEGLER-NATTA PROCATALYSTS AND CATAYSTS PREPARED THEREFROM FOR OLEFIN POLYMERIZATIONS

摘要

Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.

主权项

1. A polyethylene polymer prepared having a polydispersity (PDI) of less than 3.5, a MWCCR in the range of 0.75 to 1.10, a density in the range of from 0.900 to 0.960 g/cm3; a melt index (I2) in the range of from 0.1 to 50 g/10 minutes; and, a melt flow ratio (I10/I2) in the range of from 6 to 10.