Polymers with improved toughness and ESCR for large-part blow molding applications

摘要

Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.

主权项

1. An ethylene/a-olefin copolymer composition having a density in a range from about 0.95 to about 0.965 g/cm3, a high load melt index (HLMI) in a range from about 2 to about 10 g/10 min, a peak molecular weight (Mp) in a range from about 65,000 to about 115,000 g/mol, a Mn in a range from about 30,000 to about 60,000 g/mol, a Mz in a range from about 1,750,000 to about 4,000,000 g/mol, and a ratio of Mw/Mn in a range from about 7 to about 15.