Dow Global Technolgoies LLC

Dow Global Technoloiges LLC

Bryan D Stubbert

Arkady L Krasovskiy

Jerzy Klosin

David R Wilson

Edmund M Carnahan

Philip P Fontaine

Daniel J Arriola

Robert D J Froese

Mari S Rosen

Tulaza Vaidya

Clark H Cummins

Anna V Davis

Jaclyn Murphy

Teresita Kashyap

Evelyn Auyeung

Robert DJ Froese

The present disclosure relates to a process for preparing an alpha-substituted acrylate, the process comprising: a) combining starting materials comprising an alpha-(halomethyl) acrylate and an organoaluminum compound, thereby forming a product comprising the alpha-substituted acrylate.

Process for preparing an alpha-substituted acrylate

Catalyst systems comprising a metal-ligand complex according to formula (I): where: M is a metal chosen from zirconium or hafnium, the metal having a formal oxidation state of +2, +3, or +4; each X is a monodentate or bidentate ligand independently chosen from (C-C) hydrocarbyl, (C-C) aryl, (C-C) heteroaryl, or halogen; n is 2 or 3; R, R, R, R, and Rare independently chosen from (C-C) hydrocarbyl, (C-C) heterohydrocarbyl, —Si(R), —N(R), —OR, halogen, or hydrogen; optionally, Rand Rare covalently linked to form an aromatic ring; zand zare independently C(R) or N, wherein each Ris —II or (C-C) hydrocarbyl; provided that at least one of zand zis N; and each Rand Rin formula (I) is independently a (C-C) hydrocarbyl.

Bidentate diazinylamido complexes as catalysts for olefin polymerization

The present process embodiments for synthesizing long-chain branched copolymers include contacting together one or more C-Calkene monomers, at least one diene or polyene, optionally a solvent, and a multi-chain catalyst. The multi-chain catalyst includes a plurality of polymerization sites and produces at least two polymer chains of the C-Calkene monomers, each polymer chain polymerizing at one of the polymerization sites. The process synthesizes the long-chain branched polymers by connecting the two polymer chains with the diene or polyene, the joining of the two polymer chains being performed in a concerted manner during the polymerization.

Process of polymerizing tetra-functional long-chain branched polyolefin resins

Ethylene-based polymers comprise reaction products of polymerizing ethylene monomer, at least one diene or polyene comonomer, and optionally at least one Cto Ccomonomer under defined polymerization reaction conditions, the ethylene-based polymer having: an M/Mgreater than 1.20. The Mis the 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 Cto Ccomonomers present in the ethylene-based polymer, if any, without the at least one polyene comonomer, under the defined polymerization reaction conditions; and a molecular weight tail quantified by an MWD area metric, A, and Ais less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.

Tetra-functional long-chain branched ethylene-based polymers

Embodiments are directed to catalyst systems comprising at least one metal ligand complex and to processes for polyolefin polymerization incorporating the catalyst systems. The metal ligand complexes have the following structures: (I)

Bidentate azolylamido metal-ligand complexes and olefin polymerization catalysts

Embodiments are directed to a catalyst system comprising metal-ligand complexes and processes for polyolefin polymerization using the metal-ligand complex having the following structure, Formula (I), where X is selected from the group consisting of &#x2014;(CH2)SiRX3. 

Bis-phenyl-phenoxy polyolefin catalysts having a methylenetrialkylsilicon ligand on the metal for improved solubility

Embodiments are directed to a catalyst system comprising metal ligand complexes and processes for polyolefin polymerization using the metal ligand complex having the following structure: where each X is selected from the group consisting of &#x2014;(CH)SiR. 

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Midland, MI, United States of America

Bryan D Stubbert