Chevron Phillips Chemical Company LP

Phillips Petroleum Company

Other

Chevron Philips Chemical Company, LP

David C Rohlfing

Max P McDaniel

Qing R Yang

Joel L Martin

Paul J DesLauriers

Youlu Yu

Michael D Jensen

Elizabeth Ann Benham

M Bruce Welch

Syriac J Palackal

Matthew G Thorn

William R Coutant

Gil R Hawley

Kathy S Collins

Ashish M Sukhadia

Tony R Crain

Chung Ching Tso

Anthony P Eaton

Christopher E Wittner

Jay Janzen

Paul J Deslauriers

Max P Mcdaniel

Alan D Eastman

Jim D Byers

Steven J Secora

Eric T Hsieh

Jeffrey S Fodor

Randy S Muninger

Randall S Muninger

Al R Wolfe

Jerry T Lanier

Kiplin D Cowan

William M Whitte

Jeff S Fodor

Pamela L Maeger

Louis Moore, Jr

Helmut G Alt

Yongwoo Inn

Errun Ding

William B Beaulieu

Rajendra K Krishnaswamy

Kumudini C Jayaratne

Bryan E Hauger

David W Dockter

Joseph E Figard

Melvin Hildebrand

Ralph S Becker

Pamela L Meager

David F Register

Jim E French

Louis Moore

Kiplan D Cowan

Paul J Des Lauriers

Qing Yang

A catalyst composition comprising (a) a first metallocene complex represented by the general formula: where Mis Ti, Zr or Hf, Xand Xare each independently F, Cl, Br, I, methyl, benzyl, phenyl, H, BH, a hydrocarbyloxide group having up to 20 carbon atoms, a hydrocarbylamino group having up to 20 carbon atoms, a trihydrocarbylsilyl group having up to 20 carbon atoms, OBR'wherein R&#x2032; may be an alkyl group having up to 12 carbon atoms or an aryl group having up to 12 carbon atoms, and SOR&#x2033; wherein R&#x2033; may be an alkyl group having up to 12 carbon atoms or an aryl group having up to 12 carbon atoms, and Cpand Cpare each independently a substituted or unsubstituted cyclopentadienyl group, or a substituted or unsubstituted indenyl group, where any substituent on Cpand Cpis H, a hydrocarbyl group having up to 18 carbon atoms or a hydrocarbylsilyl group having up to 18 carbon atoms, (b) a second metallocene complex, (c) a non-group 4 metallocene transition-metal complex, (d) an activator or activator-support, and (e) an optional cocatalyst.

Catalyst systems and methods of making and using same

A composition comprising a polyethylene wherein the composition is enriched in polymer molecules having topological variations by an enrichment factor &#x3c9; and wherein the composition displays a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms. A composition comprising an isolated Ziegler-catalyzed polyethylene having a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms at the high molecular weight end.

Hyperbranched polymers and methods of making and using same

A method of preparing a medium-density polyethylene pipe comprising melting a multimodal metallocene-catalyzed polyethylene resin to form a molten polyethylene, wherein the multimodal metallocene-catalyzed polyethylene resin has a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition of greater than about 90 kPa of stress, and a shear rate for smooth to matte transition greater than about 10 s, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test; and forming the molten polyethylene resin into pipe. A pipe prepared from a multimodal metallocene-catalyzed polyethylene resin having a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi; a stress for smooth to matte transition of greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test.

Controlling melt fracture in bimodal resin pipe

The present techniques relate to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene compound comprising bridging &#x3b7;-cyclopentadienyl-type ligands, typically in combination with a cocatalyst, and a activator. The compositions and methods presented herein include ethylene polymers with low melt elasticity.

Polymerization catalysts for producing polymers with low melt elasticity

The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6.

Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches

The present invention provides several methods of determining values of physical or chemical properties of polymers. In these methods, at least two polymer training samples are provided. Characteristics of the polymer microstructures of the training samples are correlated with values of physical or chemical properties of the training samples. These correlations are subsequently applied to the respective characteristics of polymer test samples in order to determine the values of physical or chemical properties of the test samples.

Method for employing SEC-FTIR data to predict mechanical properties of polyethylene

The present invention is directed to PE-100 ethylene copolymers and pipe made thereof having a Tabor abrasion between about 0.01 and about 0.001 grams lost/1000 revolutions. These copolymers are formed by contacting ethylene with at least one mono-1-olefin comonomer having from 2 to about 10 carbon atoms per molecule in a reaction zone under polymerization conditions in the presence of a hydrocarbon diluent, a catalyst system, and a cocatalyst. Additionally, the comonomers may be selected from mono-1-olefins having 4 to 10 carbon atoms, such as, 1-hexene, 1-butene, 4-methyl-1-pentene, 1-octene, and 1-decene. Further, these ethylene copolymers may be employed to produce PE-100 pipe having both small diameters and diameters in excess of 42 inches substantially without sagging or other gravitational deformation. Copolymers of ethylene and 1-hexene are disclosed which are used to produce PE-100 pipe.

Olefin polymers, method of making, and use thereof

This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging &#x3b7;-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.

Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching

A polymer composition comprising a density equal to or greater than about 0.947 g/cc, a high load melt index from about 1 g/10 min to about 30 g/10 min, and a tensile natural draw ratio less than about 14167 &#x3c1;-12958, where &#x3c1; is the density (g/cc) of the composition. A polymer composition comprising a tensile natural draw ratio less than about 14167&#x3c1;-12958, where &#x3c1; is the density (g/cc) of the composition and wherein less than about 1 weight percent of the composition comprises non-polymeric additives.

Polyethylene compositions and pipe made from same

Polymerization catalysts for producing polymers with low levels of long chain branching

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Bartlesville, OK, United States of America

David C Rohlfing