Univation Technologies, LLC

Dow Global Technolgoies LLC

Union Carbide Chemicals & Plastics Technology Corporation

Union Carbide Chemicals & Plastics

Timothy Todd Wenzel

Phillip Dene Hustad

Roger L Kuhlman

Daniel J Arriola

Edmund M Carnahan

David James Schreck

David D Devore

Mark Gregory Goode

John Francis Szul

Sun-Chueh Kao

James C Stevens

Jerzy Klosin

Simon Mawson

Timothy R Lynn

Robert J Jorgensen

David H McConville

Gordon R Roof

Tae Hoon Kwalk

Francis J Timmers

Yunwa Wilson Cheung

Colin Li Pi Shan

Benjamin C Poon

David H Bank

Paul C Vosejpka

Robert D J Froese

Gregory T Whiteker

John Robert Briggs

Duane R Romer

Jasson T Patton

Arkady L Krasovskiy

Matthias Stefan Ober

Lixin Sun

Ruth Figueroa

Thomas Henry Peterson

John Henry Oskam

Kersten Anne Terry

Matthew Gary McKee

Robert Harold Vogel

Brian A Jazdzewski

Pamela J Stirn

David D Graf

Dick Alan Nagaki

Zondra Dee Dixon

Nicole L Wagner

Clark Curtis Williams

Guenter A Jueptner

Brian G Landes

Endre Szuromi

Dean M Welsh

Matthew D Christianson

Joseph N Coalter, Iii

Timothy De Vries

Curt N Theriault

Purna Chand Sishta

Paul H Moran

George Ernest Keller, Ii

Robert Froese

William C Brooks

Mark Wilton Smale

Jean Bowman Cropley

Marilyn Bokota

Eldon Ronald Larsen

Keith Ernest Carmichael

David W Butler

Teresa L Fortin

Robert D Froese

Arakalud Venkatapathia Ramamurthy

Philip D Hustad

Joseph N Iii Coalter

Brian A Jazdazewski

Provided is a non-cyclopentadienyl-based chromium-ligand complex, preferably a chromium-ligand complex of formula (J): LCr(R)(D)(J), wherein L is a non-Cp monoanionic ligand; Cr (chromium) is in a formal oxidation state of +3 or +2; when Cr formally is Cr, either m is 1 and Ris hydrocarbylene (a hydrocarbylene chromium-ligand complex of formula (J)) or m is 2 and each Rindependently is hydrocarbyl (a dihydrocarbyl chromium-ligand complex of formula (J)), wherein each hydrocarbyl or hydrocarbylene of Rindependently is unsubstituted or substituted by from 1 to 5 R; each Rindependently is a neutral aprotic heteroalkyl, neutral aprotic heterocycloalkyl, neutral aprotic heteroaryl, or neutral aprotic aryl; when Cr formally is Cr, m is 1 and Ris hydrocarbyl (a hydrocarbyl chromium-ligand complex of formula (J)); k is an integer of 0 or 1; D is absent when k is 0 or D is a neutral ligand when k is 1; wherein the chromium-ligand complex of formula (J) is overall neutral and lacks a cyclopentadienyl-based (Cp-based) moiety. Also provided is a chromium catalyst comprising or prepared from the complex. Also provided is a process of making the catalyst and a process employing the chromium catalyst for polymerizing the olefin monomer, especially a straight chain 1-alkene, to prepare the polyolefin, especially a partially chain-straightened poly(1-alkene) or olefin block copolymer. Further provided is the partially chain-straightened poly(1-alkene) or olefin block copolymer prepared thereby. Also provided is a high throughput workflow.

Non-cyclopentadienyl-based chromium catalysts for olefin polymerization

A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining:

Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation

The present invention relates to compositions and processes of making ethylene/&#x3b1;-olefins. More particularly, the invention relates to processes of producing ethylene/&#x3b1;-olefin compositions having a controlled molecular weight distribution. The molecular weight distribution is controlled, for example, by controlling the relative monomer concentrations during contact with a pre-catalyst and/or using a catalyst comprising a catalytic amount of a molecule having the structure: 

Processes of controlling molecular weight distribution in ethylene/&#x3b1;-olefin compositions

Meta-block copolymers and a process for preparing a product mixture comprising meta-block copolymers by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more ethylenically unsaturated polymers, said unsaturation defining one or more polymer segments in each ethylenically unsaturated polymer, at least one polymer segment in at least one ethylenically unsaturated polymer being chemically distinguishable from at least one polymer segment in at least one other ethylenically unsaturated polymer, characterized in that each meta-block copolymer in the product mixture comprises a random distribution of said chemically distinguishable polymer blocks.

Production of meta-block copolymers by polymer segment interchange

Two or more chemically distinguishable ethylenically unsaturated polymers, at least one having from 0.001 to 50 mole percent unsaturation and at least one other having an expected Tg or measured Tm value greater than 100&#xb0; C. are cross-metathesized to form thermoplastic elastomers having improved performance properties.

Production of metathesis products by high melting polymer segment interchange

A polymerization process and the resulting polymer composition, said process comprising polymerizing one or more addition polymerizable monomers and a polymerizable shuttling agent in the presence of at least one addition polymerization catalyst comprising a metal compound or complex and a cocatalyst under conditions characterized by the formation of a branched polymer, preferably comprising pseudo-block molecular architecture.

Catalytic olefin block copolymers via polymerizable shuttling agent

A process for preparing polymers, especially multi-block copolymer containing therein two or more segments or blocks differing in chemical or physical properties, by contacting propylene, 4-methyl-1-pentene, or other C&#x3b1;-olefins and one or more copolymerizable comonomers, especially ethylene in the presence of a composition comprising the admixture or reaction product resulting from combining:

Catalyst composition comprising shuttling agent for higher olefin multi-block copolymer formation

The present invention relates to compositions and processes of making polymers having a controlled molecular weight distribution. The molecular weight distribution is controlled, for example, by controlling the relative monomer concentrations during contact with a pre-catalyst and/or using a catalyst comprising a catalytic amount of a molecule having the structure: wherein

Processes of controlling molecular weight distribution in ethylene/alpha-olefin compositions

A process for the polymerization of one or more addition polymerizable monomers and the resulting polymer products, said process comprising: 1) contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions in a reactor or reactor zone with a composition comprising at least one olefin polymerization catalyst and a cocatalyst and characterized by the formation of polymer chains from said monomer or monomers; 2) transferring the reaction mixture to a second reactor or reactor zone and optionally adding one or more additional reactants, catalysts, monomers or other compounds prior to, commensurate with, or after said transfer; and 3) causing polymerization to occur in said second reactor or reactor zone to form polymer chains that are differentiated from the polymer chains formed in step 1); said process being characterized by addition of a chain shuttling agent to the reaction mixture prior to, during, or subsequent to step 1) such that at least some of the resulting polymer molecules from step 3) comprise two or more chemically or physically distinguishable blocks or segments.

Catalytic olefin block copolymers with controlled block sequence distribution

A cross-metathesized product mixture is prepared by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more chemically distinguishable ethylenically unsaturated polymers, at least one of said ethylenically unsaturated polymers (first polymer) having from 0.001 to 50 mole percent unsaturation and at least one other of said ethylenically unsaturated polymers (second polymer) being an amorphous polymer having a Tg less than 0&#xb0; C. and having from 0.001 to 5 mole percent unsaturation.

Production of metathesis products by amorphous polymer segment interchange

A process for the polymerization of one or more addition polymerizable monomers to form a copolymer comprising multiple regions or segments of differentiated polymer composition or properties comprising contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions with a composition comprising at least one olefin polymerization catalyst, a cocatalyst and a chain shuttling agent, said process being characterized by formation of at least some of the growing polymer chains under differentiated process conditions such that two or more blocks or segments formed within at least some of the resulting polymer are chemically or physically distinguishable.

Pseudo-block copolymers and process employing chain shuttling agent

Growing community of inventors

Charleston, WV, United States of America

Timothy Todd Wenzel