Patent ID: 8318875
Filing Date: 2012-11-27
Classification: C08F

Abstract:
1. A continuous process to produce polypropylene comprising contacting propylene in a reactor at 80 to 150° C. and 6.9 to 34.5 MPa, in the presence of an activator and a metallocene represented by the formula: wherein each R is, independently, hydrogen or a C recovering an isotactic propylene homopolymer having: 1) more than 15 and less than 100 regio defects (sum of 2,1-erythro and 2,1-threo insertions and 3,1-isomerizations) per 10,000 propylene units; 2) an Mw (weight average molecular weight) of 35,000 g/mol or more; 3) a peak melting temperature of greater than 149° C.; 4) an mmmm pentad fraction of 0.85 or more; 5) a heat of fusion of 80 J/g or more; and 6) a peak melting temperature minus peak crystallization temperature (Tmp−Tcp) of less than or equal to (0.907 times Tmp) minus 99.64 (Tmp−Tcp≦(0.907×Tmp)−99.64), as measured in ° C. on the homopolymer having 0 wt % nucleating agent.