	US 12,031,022 B2
	Dual catalyst system for producing LLDPE and MDPE copolymers with long chain branching for film applications
Errun Ding, Mason, OH (US); Chung Ching Tso, Bartlesville, OK (US); Max P. McDaniel, Bartlesville, OK (US); Ashish M. Sukhadia, Bartlesville, OK (US); Youlu Yu, Bartlesville, OK (US); Randall S. Muninger, Dewey, OK (US); Aaron M. Osborn, Owasso, OK (US); and Christopher E. Wittner, Dewey, OK (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Apr. 29, 2022, as Appl. No. 17/732,628.
Application 17/732,628 is a continuation of application No. 16/837,009, filed on Apr. 1, 2020, granted, now 11,339,279.
Prior Publication US 2022/0267579 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/16 (2006.01); C08F 4/6592 (2006.01); C08L 23/08 (2006.01)

CPC C08L 23/0815 (2013.01) [C08F 4/65925 (2013.01); C08F 4/65927 (2013.01); C08F 210/16 (2013.01); C08L 2203/16 (2013.01); C08L 2207/066 (2013.01)]

25 Claims

1. A film comprising an ethylene polymer, the ethylene polymer having:

a melt index in a range from 0 to about 15 g/10 min;

a density in a range from about 0.91 to about 0.945 g/cm³;

a CY-a parameter at 190° C. in a range from about 0.2 to about 0.6;

an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms of the ethylene polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than or equal to about 5; and

a maximum ratio of extensional viscosity to three times shear viscosity, η_E/3η, at an extensional rate of 0.03 sec⁻¹in a range from about 3 to about 15.