Polyethylene, method for preparing the same and separator using the same
AssigneeLotte Chemical Corporation
InventorsKyung Hoon KIM, Jung Ju YOON, Dong Hoon LEE
Life of this patent
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Abstract
Disclosed herein is a polyethylene. The polyethylene has a melt flow index of about 0.4 g/10 min to about 0.6 g/10 min, a weight average molecular weight of about 500,000 g/mol to about 700,000 g/mol, and a molecular weight distribution of about 3 to about 5 and is prepared by polymerization in the presence of a catalyst retaining at least about 50% of an initial reactivity level (during initial 30 minutes) for a period of time exceeding about 4 hours.
Claims7
A polyethylene having a melt flow index of about 0.4 g/10 min to about 0.6 g/10 min, as measured at a temperature of 190° C. and under a load of 2.16 kg, a weight average molecular weight of about 500,000 g/mol to about 700,000 g/mol, and a molecular weight distribution of about 3 to about 5, wherein the polyethylene is prepared by polymerization in the presence of a catalyst retaining at least about 50% of an initial reactivity level (during initial 30 minutes) for a period of time exceeding about 4 hours.
The membrane according to claim 7, wherein the separator membrane is a separator membrane for lithium ion batteries.
Dependencies are inferred from the claim text.