Metallocene-produced very low density polyethylenes

Details Metallocene-produced very low density polyethylenes Metallocene-produced very low density polyethylenes

2005-08-23

2005-08-23

Tarazano, D. Lawrence (Department: 1773)

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Utilizing laminated parison

C428S512000, C428S461000, C525S240000, C526S340100, C526S943000

Reexamination Certificate

active

06932592

ABSTRACT:
A very low density polyethylene having a density of 0.890 to 0.915 and a Dart Drop value of at least about 450 g/mil or above is disclosed. Gas phase polymerization methods are also disclosed for making very low density linear polyolefins utilizing a metallocene catalyst, and the resulting polyolefin products. In a specific embodiment, a gas phase polymerization process is disclosed relating to the formation of a linear polyethylene having a very low density, e.g., ranging from 0.890 to 0.915, but with improved toughness.

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