US 11,912,799 B2
Tetra-functional long-chain branched ethylene-based polymers
Robert D. J. Froese, Midland, MI (US); Daniel J. Arriola, Midland, MI (US); Teresita Kashyap, Lake Jackson, TX (US); and Bryan D. Stubbert, Midland, MI (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/280,303
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Sep. 27, 2019, PCT No. PCT/US2019/053529
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/069365, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/738,633, filed on Sep. 28, 2018.
Prior Publication US 2021/0388131 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/18 (2006.01); C08F 210/16 (2006.01)
CPC C08F 210/16 (2013.01) [C08F 210/18 (2013.01)] 19 Claims
 
1. An ethylene-based polymer comprising a reaction product of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one C3 to C14 comonomer under defined polymerization reaction conditions, wherein the ethylene-based polymer has:
an Mw/Mw0 greater than 1.20, where Mw is the weight-average molecular weight of the ethylene-based polymer as determined from a gel permeation chromatography curve of the ethylene-based polymer acquired by refractive index chromatography, and Mw0 is initial weight-average molecular weight of a comparative ethylene-based polymer by gel permeation chromatography, the comparative ethylene-based polymer being a reaction product of polymerizing ethylene monomer and all C3 to C14 comonomers present in the ethylene-based polymer, if any, without the at least one diene or polyene comonomer, under the defined polymerization reaction conditions; and
a high molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.