Fina Technology, Inc.

Brian Cole

Gerhard Guenther

David J Rauscher

Steven Daniel Gray

Tim J Coffy

David W Knoeppel

Eric Maziers

Vincent Henri Barre

Cyril Chevillard

Carlos R Corleto

Ruby Curtis

Stan Biesert

Son Nguyen

Danielle Childress

Gregory S DeKunder

G Travis Meredith

Walter T Jagmin

John Ashbaugh

Pipe articles and methods of forming the same are described herein. The methods generally include providing an ethylene based polymer; contacting the ethylene based polymer with a secondary stabilizer including a diphosphite to form a modified polyethylene; and forming the modified polyethylene into a pipe.

Polyethylene composition for large diameter pipe stability

Disclosed is a bimodal Ziegler-Natta catalyzed polyethylene, having a density of from 0.930 g/cc to 0.960 g/cc, and a molecular weight distribution of from 10 to 25, wherein an article formed therefrom has a PENT of at least 1500. Also disclosed is a method of preparing a tubular article including obtaining a bimodal polyethylene having a density of from 0.930 g/cc to 0.960 g/cc and a molecular weight distribution of from 10 to 25, and processing the polyethylene under conditions where a specific energy input (SEI) is less than 300 kW&#xb7;h/ton, and wherein the article has a PENT of at least 1500. Further disclosed is a method for controlling the degradation of polyethylene including polymerizing ethylene monomer, recovering polyethylene, extruding the polyethylene, and controlling the degradation of polyethylene by measuring the SEI to the extruder and adjusting throughput and/or gear suction pressure keep SEI less than 300 kW&#xb7;h/ton, and forming an article.

Bimodal pipe resin and products made therefrom

The present invention includes an end use article (i.e., an article of manufacture) and a process for making the same, wherein the end use article has a relatively high gloss and exhibits excellent processability over a wide range of processing conditions. The end use article can be formed with glossy polyethylene having an 'a' parameter less than or equal to about 0.40, and the glossy polyethylene can be a Metallocene polyethylene. The end use article can have a 60&#xb0; specular gloss of at least about 40%, or from about 40% to about 80%, or from about 60% to about 80%. The end use article may be pigmented or unpigmented.

High gloss polyethylene articles

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Kingwood, TX, United States of America

Brian Cole