Phillips Petroleum Company

Other

Chevron Phillips Chemical Company LP

Eric T Hsieh

Max P McDaniel

Paul D Smith

Gil R Hawley

Elizabeth Ann Benham

M Bruce Welch

Helmut G Alt

Syriac J Palackal

Rolf L Geerts

Konstantinos Patsidis

Joel L Martin

Steven J Secora

Joseph J Bergmeister

Paul J DesLauriers

Alan D Eastman

David C Rohlfing

Timothy W Johnson

Michael Schmid

Douglas D Klendworth

Donald D Norwood

Elizabeth A Boggs

Michael D Jensen

Ashish M Sukhadia

Kathy S Collins

Anthony P Eaton

Rex L Bobsein

John P Hogan

Joseph S Shveima

John D Stewart

Jay Janzen

Gene H Yeh

Gerhard K Guenther

James C Randall

John R Donaldson

Max P Mcdaniel

Douglas Klendworth

Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.

Organometallic fluorenyl compounds, preparations, and use

A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide supported titanium-containing catalyst systems, inorganic oxide supported organo-zirconium catalyst systems and inorganic oxide supported organo-hafnium catalyst systems.

Olefin polymerization processes and products thereof

A method of determining the proportion of short-chain branching in an olefin copolymer process stream is disclosed. The short-chain branching may also be determined as a function of molecular weight in a sample having a range of molecular weights. In the method, at least two olefin copolymer training samples are provided. The respective samples have different, known proportions of short-chain branching. The infrared (e.g. FT-IR) absorbance spectra of the training samples in a wavenumber range are obtained. Calibration information is determined from the training samples by chemometrically correlating the differences in the infrared absorbance spectra of the training samples to the differences in the degree of short-chain branching in the training samples. This step generates calibration information that allows the degree of short-chain branching in a sample to be determined once its infrared absorbance spectrum is obtained. A method for determining the statistical error in the measurement of short-chain branching in an olefin polymer sample as a function of its molecular weight distribution is also disclosed.

Measurement of short chain branching in olefin copolymers using chemometric analysis

Organometal catalyst compositions

A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.

Olefin polymerization process

Bridged and unbridged fluorenyl-containing metallocenes of the formula R&Prime; (FlR )(CpR )MQ wherein Fl is a fluorenyl radical, Cp is a cyclopentadienyl, indenyl, tetrahydroindenyl, or fluorenyl radical, each R is an organo radical, R&Prime; is a structural bridge linking (FlR ) and (CpR ), M is a metal selected from the group consisting of IVB, VB, and VIB metals, each Q is selected from the group consisting of hydrocarbyl or hydrocarbyloxy radicals and halogen, x is 1 or 0, k is an integer sufficient to fill out the remaining valences of M, n is in the range of 0 to 7, and m is 0 to 7, further characterized by the fact that if (CpR ) is unsubstituted fluorenyl and metallocene is an unbridged metallocene, then n is 1 to 7 and if R&Prime; is 1,1-dimethylmethylene and (CpR ) is unsubstituted cyclopentadienyl or 3-methylcyclopentadienyl, then n is 1 to 7.

Organometallic fluorenyl compounds, preparation, and use

Bridged fluorenyl-containing metallocenes of metals of Groups 4-6 and their use in forming homopolymers of alpha olefins or polymers of ethylene and optionally minor amounts of alpha olefins, wherein in each case at least one of the cyclic groups of the bridged ligand is a fluorenyl and the other is selected from indenyl, tetrahydroindenyl, fluorenyl, and in the case of the polymerization of ethylene optionally cyclopentadienyl.

A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymer.

Unbridged fluorenyl containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.

Organometallic fluorenyl compounds and use thereof in olefin

9-substituted fluorenyl-containing metallocenes and their use in the polymerization of olefins is disclosed. In addition, novel 9-cyclohexylfluorenyl or 9-phenylfluorenyl compounds are disclosed. Also methods for preparing such 9-substituted fluorenyl compounds are presented.

Unbridged metallocenes of 9-substituted fluorenyl compounds and use

Growing community of inventors

Bartlesville, OK, United States of America

Eric T Hsieh