The Dow Chemical Company

Dow Global Technolgoies LLC

Idemitsu Kosan Company, Limited

W.r. Grace & Co. -conn.

W. R. Grace Co.-conn.

Dow Global Michigan Technologies Inc.

Richard E Campbell, Jr

Francis J Timmers

David D Devore

Linfeng Chen

Ravi B Shankar

Duane R Romer

Paul C Vosejpka

Daryoosh Beigzadeh

James C Stevens

Daniel J Arriola

Jasson T Patton

Hendrik E Tuinstra

Gregory F Schmidt

Jerzy Klosin

David R Wilson

Robert K Rosen

David R Neithamer

Eugene Y Chen

Jorge Soto

Grant B Jacobsen

D Patrick Green

Edmund M Carnahan

David A Babb

John G Hefner

Phillip Dene Hustad

Thoi H Ho

Robert J Jorgensen

Peter N Nickias

William Monroe Coleman, Iii

Sean W Ewart

Dennis A Hucul

Peter M Margl

Jan Willem Van Egmond

Kevin A Frazier

Robert A Devries

Sylvie Y Desjardins

Mark McAdon

Roger B Painter

Robert Froese

Robert E LaPointe

Matthew T Bishop

Robert Reib

Kevin P Peil

Shaoguang S Feng

Thomas J McKeand

Michael W Tilston

Mark S Delaney

Stephen E Hahn

Oscar D Redwine

Robert N Reib

A catalyst composition for the polymerization of propylene is provided. The catalyst composition includes one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors, one or more aluminum containing cocatalysts and a selectivity control agent (SCA). The SCA is a mixture of an activity limiting agent and a silane composition. The catalyst composition has a molar ratio of aluminum to total SCA from 0.5:1 to 4:1. This aluminum/SCA ratio improves polymerization productivity and the polymer production rate. The catalyst composition is self-extinguishing.

Self-limiting catalyst system with controlled aluminum to SCA ratio and method

A catalyst composition for the polymerization of propylene is provided. The catalyst composition includes one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and an internal electron donor, one or more aluminum containing cocatalysts, and a selectivity control agent (SCA). The SCA is a mixture of an activity limiting agent (ALA) and selectivity determining agent (SDA) such as a non-silane composition. The present catalyst composition is silane-free, has high catalyst activity and high stereoselectivity, and is self-extinguishing.

Self-limiting catalyst composition with No silane

A process for polymerizing ethylene to produce an ethylene-based polymer including contacting ethylene with a Ziegler-Natta procatalyst, an alkylaluminum cocatalyst and a self limiting agent selected from the group of aliphatic, cycloaliphatic, substituted cycloaliphatic or aromatic esters, anhydrides and amides such that the self limiting agent reduces polymerization rates to no greater than 40% of the polymerization rate in the absence of the self limiting agent at temperatures equal to or greater than 120&#xb0; C. is provided.

Self limiting catalyst composition for ethylene polymerization

A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and 1-octene and a polymerization process using the polymerization modifier.

Polymerization modifiers

A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and propylene and a polymerization process using the polymerization modifier.

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; a selectivity control agent (SCA) comprising at least one silicon containing compound containing at least one Calkoxy group bonded to a silicon atom, and one or more activity limiting agent (ALA) compounds comprising one or more aliphatic or cycloaliphatic carboxylic acids; alkyl-, cycloalkyl- or alkyl(poly)(oxyalkyl)-(poly)ester derivatives thereof; or inertly substituted derivatives of the foregoing.

Self limiting catalyst composition and propylene polymerization process

A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom.

A method for identifying a catalyst composition for use in the heterogeneous Ziegler-Natta addition polymerization of an olefin monomer, said catalyst composition comprising a procatalyst comprising a magnesium and titanium containing procatalyst and a cocatalyst said method comprising: a) providing a library comprising at least one procatalyst compound, b) forming a catalyst composition library by contacting the member of said procatalyst library with one or more cocatalysts and contacting the resulting mixture with an olefin monomer under olefin polymerization conditions thereby causing the polymerization reaction to take place, c) measuring at least one variable of interest during the polymerization, and d) selecting the catalyst composition of interest by reference to said measured variable.

Method for identifying Ziegler-Natta cocatalysts

A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom. 

Technique for selecting polymerization modifiers cross reference statement

A process for the polymerization of olefin monomers comprising contacting ethylene or a mixture of ethylene and one or more C&#x3b1; olefins with a catalyst composition comprising one or more Group 3-10 transition metal containing, Ziegler-Natta, procatalyst compounds; one or more alkylaluminum cocatalyts; and one or more polymerization control agents, said process being characterized in that at least one such polymerization control agent is an alkyl or aryl, ester of an aliphatic or aromatic (poly)carboxylic acid optionally containing one or more substituents comprising a Group 13, 14, 15, or 16 heteroatom.

Catalyst composition for ethylene polymerization

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; and a mixture of two or more different selectivity control agents, said SCA mixture comprising from 1 to 99 percent of one or more esters of one or more aromatic monocarboxylic acids or substituted derivatives thereof, and from 99 to 1 percent of one or more alkoxysilane compounds.

Self limiting catalyst composition with dicarboxylic acid ester internal donor and propylene polymerization process

A cocatalyst or cocatalyst component, including a compound corresponding to the formula: (A*)(Z*J*),

Expanded anionic compounds comprising hydroxyl or quiescent reactive functionality and catalyst activators therefrom

Growing community of inventors

Midland, MI, United States of America

Richard E Campbell, Jr