US 11,952,480 B2
Enhanced processability of LLDPE by addition of ultra-high molecular weight density polyethylene
Johannes M. Soulages, Basking Ridge, NJ (US); Arnold Lustiger, Edison, NJ (US); Thomas T. Sun, Clinton, NJ (US); Pamela J. Wright, Easton, PA (US); Madhavi Vadlamudi, Clinton, NJ (US); Alexander I. Norman, Somerville, NJ (US); Adriana S. Silva, Houston, TX (US); David M. Fiscus, Houston, TX (US); and Timothy D. Shaffer, Plainfield, NJ (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Appl. No. 16/763,909
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
PCT Filed Feb. 5, 2019, PCT No. PCT/IB2019/000220
§ 371(c)(1), (2) Date May 13, 2020,
PCT Pub. No. WO2019/162760, PCT Pub. Date Aug. 29, 2019.
Claims priority of provisional application 62/626,240, filed on Feb. 5, 2018.
Prior Publication US 2021/0371632 A1, Dec. 2, 2021
Int. Cl. C08L 23/08 (2006.01); B29C 48/00 (2019.01); B29C 48/10 (2019.01); C08J 5/18 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01)
CPC C08L 23/0815 (2013.01) [B29C 48/022 (2019.02); B29C 48/10 (2019.02); C08J 5/18 (2013.01); B29K 2023/0625 (2013.01); B29K 2023/0683 (2013.01); B29K 2105/0088 (2013.01); B29K 2995/0063 (2013.01); B29K 2995/0077 (2013.01); C08J 2323/08 (2013.01); C08J 2423/08 (2013.01); C08L 2205/025 (2013.01); C08L 2207/066 (2013.01); C08L 2207/068 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A composition comprising:
1) about 99.5 wt % to about 99.75 wt % of a linear low density polyethylene (LLDPE) comprising a copolymer of ethylene and one or more C3 to C40 alpha-olefins and produced in a gas phase reactor, slurry reactor, solution reactor, or a combination thereof, the LLDPE having:
a density of about 0.91 g/cm3 to about 0.94 g/cm3;
a melt index of from about 0.1 to about 5 dg/min;
a composition distribution breadth index greater than or equal to 60%;
an Mw of about 20,000 g/mol to less than about 500,000 g/mol;
a melt strength of about 10 mN or greater;
a g′vis of about 0.97 or more; and
an Mw/Mn of about 1.8 to about 6.0; and
2) about 0.25 wt % to about 0.5 wt % of a high density linear ultra-high molecular weight polyethylene (UHMW-PE) comprising a copolymer of ethylene and one or more C3 to C40 alpha-olefins and having:
an Mw of about 500,000 g/mol or more;
an Mw/Mn of about 4.0 to about 7.0;
a density of about 0.94 g/cm3 to about 0.97 g/cm3; and
a g′vis of about 0.97 or more;
wherein the composition:
has a shear thinning index at 190° C. between 4.0 and 11.0; and
has a strain hardening ratio at 150° C., 0.1 s−1 of about 1.5 or more; and
when formed into a film produces a film having:
a machine direction Elmendorf Tear greater than about 150 g/mil to 250 g/mil; and
a Dart Drop (Phenolic A) greater than about 400 g/mil to 550 g/mil.