Exxonmobil Chemical Patents Inc.

Univation Technologies, LLC

Douglas J Laurent

James McLeod Farley

Richard Wayne Halle

Alan M Malakoff

Donna Sue Davis

Jerry Michael Johnson

Kevin Cable

George Panagopoulos

David M Simpson

George Panagopoulous

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.

Metallocene-produced very low density polyethylenes

The present invention provides a polymer blend suitable for use as a film or a coating, the polymer blend including from 1 to 99% by weight of a metallocene-produced VLDPE polymer having a density less than 0.916 g/cm , and from 1 to 99% by weight of an LDPE polymer having a density of from 0.916 to 0.928 g/cm wherein the sum of (a) and (b) is 100%. The VLDPE polymer can have a melt index of from 6 to 15 dg/min, or from 9 to 12 dg/min. The present invention further provides polymeric films extrusion cast from such polymer blends, and articles having a flexible substrate and a polymeric film extrusion-coated on the substrate

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Appleton, WI, United States of America

Douglas J Laurent