US 12,404,357 B2
Dual metallocene bimodal HDPE resins with improved stress crack resistance
Youlu Yu, Bartlesville, OK (US); Qing Yang, Bartlesville, OK (US); Ashish M. Sukhadia, Bartlesville, OK (US); David A Soules, Bartlesville, OK (US); Jeremy M. Praetorius, Bartlesville, OK (US); and Vivek Rohatgi, Owasso, 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 Jan. 14, 2022, as Appl. No. 17/575,715.
Prior Publication US 2023/0227592 A1, Jul. 20, 2023
Int. Cl. C08F 210/16 (2006.01); C08F 10/02 (2006.01); C08F 110/02 (2006.01); C08F 210/02 (2006.01); C08F 210/18 (2006.01)
CPC C08F 210/16 (2013.01) [C08F 10/02 (2013.01); C08F 110/02 (2013.01); C08F 210/02 (2013.01); C08F 210/18 (2013.01); C08F 2420/00 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An ethylene polymer having:
a density in a range from 0.94 to 0.96 g/cm3;
a Mn in a range from 5,000 to 14,000 g/mol;
a ratio of Mw/Mn in a range from 18 to 40; and
a PENT value at 80° C. and 2.4 MPa of at least 11,500 hr;
wherein the polymer contains from 1 to 4 long chain branches per 1,000,000 total carbon atoms.