Equistar Chemicals, LP

Exxon Chemical Patents, Inc.

Occidental Chemical Corporation

Lyondell Petrochemical Company

Arco Chemical Technology, L.p.

Bradley P Etherton

Sandor M Nagy

Ramesh Krishnamurti

John A Tyrell

Leonard V Cribbs

Mark P Mack

John Tyrell

Edward N Kresge

Terrence Huff

Jean A Merrick-Mack

James J McAlpin

Linda N Winslow

Stephen M Imfeld

Mary K Cocoman

Philip J Garrison

Douglas C McFaddin

James H Meas

Everett O Lewis

Shaotian Wang

Michael W Lynch

Charles S Holland

Gregory G Hlatky

Barbara M Tsuie

Jia-Chu X Liu

Karen E Meyer

Edward S Vargas

Natalia Nagy

Paula L Nygard

James Ronald Clark

Daniel Ward

Richard G Austin

Mohan Sasthav

Marvin R Appel

A two-stage cascade polymerization process for the production of multimodal polyethylene film resins with improved bubble stability is provided. The process comprises polymerizing ethylene or a mixture of ethylene and a C&#x3b1;-olefin in two reactors arranged in series using a mixed single-site catalyst comprised of a bridged and a non-bridged indenoindolyl transition metal complex to form a multimodal polyethylene resin comprised of a lower molecular weight, higher density component and a higher molecular weight, lower density component.

Process for the preparation of multimodal polyethylene resins

A thick film and process to prepare polyethylene useful for the film are disclosed. Ethylene is polymerized in two reaction zones with a C-C&#x3b1;-olefin in the presence of a catalyst system comprising an activator, a supported bridged zirconium complex, and a supported non-bridged zirconium complex. The process yields medium density to linear low density polyethylene having a melt index from 0.20 to 1.0 dg/min. Thick films from the polyethylene have a superior combination of high impact strength and high modulus.

Polyethylene thick film and process for preparing polyethylene

A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an &#x3b1;-olefin, hydrogen, and a catalyst comprising an activator and a supported, dimethylsilyl-bridged bis(indenoindolyl)zirconium complex. The process has high catalyst activity and produces polyethylene having a broad molecular weight distribution.

Olefin polymerization process

A process to remove metal contaminants from a hydrocarbon solution of polyethylene is disclosed. The process comprises adding a primary alcohol and a &#x3b2;-diketone to a solution of polyethylene at a temperature within the range of 120&#xb0; C. to 300&#xb0; C. and contacting the solution with basic alumina. The process removes metal contaminants and minimizes degradation and condensation products, which can have a detrimental effect on polyethylene properties. The process provides polyethylene with low metal residues and good properties.

Removal of metal contaminants from polyethylene

An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C-Calpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields medium density and linear low density polyethylene having a bimodal molecular weight distribution and a melt index from about 0.10 to about 0.80. Films from the polyethylene have superior impact properties.

Polyethylene process

The present invention discloses a method of dispersing cyclodextrins into a base polymer. The method of the invention comprises reacting grafted microfine polymer powder with a cyclodextrin to form a cyclodextrin-attached grafted polymer, and mixing the cyclodextrin-attached grafted polymer and the base polymer for a sufficient time that the cyclodextrin-attached grafted polymer is dispersed within the base polymer. The present invention also provides several cyclodextrin-inclusion complex products formed by the method of the invention. This products include an antimicrobial polymer blend, a fragrant polymer blend, and a dyed polymer blend.

Method for preparing cyclodextrin-polyolefin blends and products made therefrom

A process for producing acid functionalized polyolefins by hydrolyzing maleic anhydride grafts using a dispersion technique is provided. Acid functionalized polyolefin powders produced by the process as well as adhesive blends formulated therewith are also disclosed.

Process for producing acid functionalized polyolefins and products

Adhesives useful for adhering fluoropolymers are provided. The adhesives are a blend of linear low density polyethylene, ethylene polymer plastomer, polyolefin elastomer and modified polyolefin having acid or acid derivative functionality. Composite fluoropolymer/adhesive structures are also provided.

Adhesives for fluoropolymer films and structures containing same

Transition metal catalysts containing bidentate ligands and method of using and preparing same

A process for preparing boratabenzene derivatives is provided. The process includes the hydrogenation of a compound containing a boranaphthalene functional group to form a boratabenzene-containing compound. Depending on the compound containing a boranaphthalene functional group, the resulting boratabenzene compound may be converted into a catalyst suitable for olefin polymerization. A process for forming a boratabenzene derivative from a halo-dioxaborolane is also provided. In this process, a halo-dioxaborolane is reacted with a piperylide salt for form a pentadienyl dioxaborolane. The pentadienyl-dioxaborolane is reacted with a strong base to form an intermediate boratacyclohexanediene salt. The intermediate boratacyclohexanediene salt is then reacted with a trialkylaluminum compound to form an alkylboratabenzene salt.

Method for preparation of boratabenzene derivatives

A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is &pgr;-bonded to M. The key ligand is made in two steps from readily available indanones and aryl hydrazines. Reaction of its anion with a source of the metal completes a remarkably simple synthetic route to a new family of single-site olefin polymerization catalysts.

Single-site catalysts for olefin polymerization

Olefin polymerization is performed in the presence of a catalyst comprising a compound of the formula

Olefin polymerization catalysts containing amine derivatives

Disclosed is a catalyst having the general formula

Azaborolinyl metal complexes as olefin polymerization catalysts

Growing community of inventors

Cincinnati, OH, United States of America

Bradley P Etherton