Univation Technologies, LLC

Dow Global Technolgoies LLC

Chuan C He

Roger L Kuhlman

John Francis Szul

Timothy R Lynn

Ayush A Bafna

Nitin Borse

Swapnil B Chandak

Bo Liu

Mridula Babli Kapur

Pradeep Jain

Yijian Lin

Wesley R Mariott

Phuong Anh Cao

Angela I Padilla-Acevedo

Cliff Robert Mure

Todd A Hogan

Peter S Martin

Robert Reib

Daudi A Abe

C Dale Lester

Joel D Wieliczko

Charles D Lester

Shadid Askar

A nucleating agent-free and LLDPE-free polyolefin composition for making films with enhanced barrier properties against water vapor and oxygen gas. Related aspects include formulations, manufactured articles, films, and methods.

Bimodal polyethylene homopolymer composition

A method of independently changing a melt rheology property value of a bimodal polyethylene polymer being made using a bimodal catalyst system in a single gas phase polymerization reactor. The method comprises process conditions comprising alkane(s) in the reactor. The method comprises a bimodal catalyst system that is characterized by an inverse response to alkane(s) concentration. The method comprises changing concentration of the alkane(s) in the reactor by an amount sufficient to effect a measurable change in the melt rheology property value; wherein the bimodal catalyst system is characterized by an inverse response to alkane(s) concentration such that when the alkane(s) concentration is increased, the melt rheology property value of the resulting bimodal polyethylene polymer is decreased, and when the alkane(s) concentration is decreased, the melt rheology property value of the resulting bimodal polyethylene polymer is increased.

Method of changing melt rheology property of bimodal polyethylene polymer

A bimodal ethylene-co-1-butene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A (blown) film consisting essentially of the bimodal ethylene-co-1-butene copolymer and having improved properties. Methods of synthesizing the bimodal ethylene-co-1-butene copolymer and making the blown film. A manufactured article comprising the bimodal ethylene-co-1-butene copolymer.

Bimodal polyethylene copolymer and film thereof

In various embodiments, a polyethylene formulation has a density of greater than 0.940 g/cmwhen measured according to ASTM D792, and a high load melt index (I) of 1.0 g/10 min to 10.0 g/10 min when measured according to ASTM D1238 at 190&#xb0; C. and a 21.6 kg load. Moreover, the polyethylene formulation has a peak molecular weight (M) of less than 50,000 g/mol, a number average molecular weight (M) of less than 30,000 g/mol, and a weight fraction (w1) of molecular weight (MW) less than 10,000 g/mol of less than or equal to 10.5 wt %, as determined by Gel Permeation Chromatography (GPC). Articles made from the polyethylene formulation, such as articles made by blow molding processes are also provided.

Polyethylene formulations for large part blow molding applications

A spray-dried zirconocene catalyst system comprising a zirconocene catalyst and a hydrophobic fumed silica, which supports the zirconocene catalyst. A spray-drying method of making same. Polyolefins; methods of making and using same; and articles containing same.

Spray-dried zirconocene catalyst system

A bimodal polyethylene composition made with a bimodal catalyst system, wherein the bimodal polyethylene composition has from greater than 0 to 14 weight percent of polyethylene polymers having a weight-average molecular weight of from greater than 0 to 10,000 grams per mol, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene

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South Charleston, WV, United States of America

Chuan C He