Dow Global Technolgoies LLC

Tomas D Paine

Brad C Bailey

Matthew D Christianson

Sukrit Mukhopadhyay

Jasson T Patton

Andrew M Camelio

Anna V Davis

Processes for polymerizing polyolefins include contacting ethylene and optionally one or more (C-C)α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a metal-ligand complex having a structure according to formula (I):

Monobidentate aminopyridine group IV transition metal olefin copolymerization catalysts with ultra-high molecular weight capability and ultra-low comonomer incorporation

Olefin polymerization catalyst systems are provided that include a procatalyst component having a metal-ligand complex of Formula (I): [formula] (I) where each X is a neutral, monoanionic, or dianionic, monodentate or polydentate ligand such that the complex of Formula (I) is neutral; each Rand Ris a (C-C)aryl, substituted (C-C)aryl, (C-C)heteroaryl, or substituted (C-C)heteroaryl; each R, R, R, R, R, and Ris a hydrogen; (C-C)hydrocarbyl; substituted (C-C)hydrocarbyl; (C-C)heterohydrocarbyl; substituted (C-C)heterohydrocarbyl; halogen; or nitro (NO) group; and each Rand Ris a (C-C)alkyl; substituted (C-C)alkyl; or [(Si)&#x2014;(C+Si)] substituted organosilyl. Additionally, olefin-based polymers and processes for polymerizing one or more olefin-based polymers in the presence of the olefin polymerization catalyst systems are also provided. 

Olefin polymerization catalyst systems and methods of use thereof

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Midland, MI, United States of America

Tomas D Paine