Branched polyethylene with improved processing and high tear films made therefrom
AssigneeExxonMobil Chemical Patents Inc.
InventorsDavid M. Fiscus, Laughlin G. McCullough, John F. Walzer, Jr., Jay L. Reimers
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Abstract
This invention relates to inventive ethylene-based copolymers comprising 75.0 wt % to 99.5 wt % of ethylene-derived units and 0.5 wt % to 25.0 wt % of C3 to C20 olefin derived units; the inventive ethylene-based copolymer having: a density in the range of from 0.900 to less than 0.940 g/cm3; a g′(vis) of less than 0.80; a melt index, I2, of from 0.25 to 1.5 g/10 min.; a Mw/Mn within a range from 3.0 to 6.0, and Mz/Mn greater than 8.0; and an absence of a local minimum loss angle at a complex modulus, G*, of 1.00×104 to 3.00×104 Pa.
Claims17
An ethylene-based copolymer comprising 75.0 wt % to 99.5 wt % of ethylene-derived units and 0.5 wt % to 25.0 wt % of C3 to C20 olefin derived units;
- the ethylene-based copolymer having:
- a) a density in the range of from 0.900 to less than 0.950 g/cm3;
- b) a g′(vis) of less than 0.80;
- c) a melt index, I2, of from 0.25 to 1.5 g/10 min.;
- d) a Mw/Mn within a range from 3.0 to 6.0;
- e) a Mz/Mn of greater than 8.0;
- and
- f) an absence of a local minimum loss angle at a complex modulus, G*, of 1.00×104 to 3.00×104 Pa.
A film comprising at least 5 wt % of an ethylene-based copolymer comprising 75.0 wt % to 99.5 wt % of ethylene-derived units and 0.5 wt % to 25.0 wt % of C3 to C20 olefin derived units;
- the ethylene-based copolymer having:
- a) a density in the range of from 0.900 to less than 0.950 g/cm3;
- b) a g′(vis) of less than 0.80;
- c) a melt index, I2 of from 0.25 to 1.5 g/10 min.;
- d) a Mw/Mn within a range from 3.0 to 6.0;
- e) a Mz/Mn of greater than 8.0;
- and
- f) an absence of a local minimum loss angle at a complex modulus, G*, of 1.00×104 to 3.00×104 Pa;
- wherein the film has:
- (i) a 1% Secant Modulus MD of 30,000 psi or greater:
- (ii) an Elmendorf Tear MD value of 100 g/mil or greater, and
- (iii) a Dart Impact of 225 g/mil or greater.
Dependencies are inferred from the claim text.