Dow Global Technolgoies LLC

Rohm and Haas Electronic Materials Korea Ltd.

Robert DJ Froese

Jerzy Klosin

David D Devore

David R Wilson

Sukrit Mukhopadhyay

Daniel J Arriola

Arkady L Krasovskiy

Brad C Bailey

Ruth Figueroa

Endre Szuromi

Dean M Welsh

Heather Spinney

Robert L Sammler

Matthew D Christianson

Andrew M Camelio

Todd D Senecal

Keran Lu

Hong-Yeop Na

Jessica L Klinkenberg

Anna V Davis

Bryan D Stubbert

Teresita Kashyap

Oscar David Redwine

Alex J Nett

Mark E Ondari

Amaruka Hazari

Alejandro J Garza Gonzalez

Cornelis Fj Den Doelder

Luca Martinetti

Jianbo Hou

Rachel Em Brooner

Cornelis FJ Den Doelder

Heather A Spinney

Embodiments of this disclosure are directed to ethylene-based polymers. The ethylene-based polymers are polymerized units derived from ethylene, diene, and optionally one or more C-Cα-olefins. The ethylene-based polymer includes a melt strength greater than negative 17 times the log base 10 of the melt index plus 25 ((MS)>−17*log (MI)+25). In the equation, MS is the melt strength in cN and MI is the melt index in g/10 min according to ASTM D1238. The ethylene-based polymer also includes an average g' that is greater than 0.70. The average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.

Long-chain branched ethylene-based polymers

The disclosure are directed to a process for polymerizing ethylene-based polymers. The process includes polymerizing ethylene and optionally one or more (C-C)α-olefin monomer, and at least one diene, in the presence of at least one multi-chain catalyst and at least one single-chain catalyst. The process may include a solvent. The multi-chain catalyst in the process includes a plurality of polymerization sites. Long-chain branched polymers are synthesized by connecting the two polymer chains of the multi-chain catalyst with the diene, the joining of the two polymer chains being performed in a concerted manner during the polymerization. The ethylene-based polymers are produced and include at least two molecular weight polymer fractions. The multi-chain catalyst produces the high molecular weight fraction, which is the long-chain branched polymer.

Process for producing long-chain branched ethylene-based polymers

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Midland, MI, United States of America

Robert DJ Froese