Edward Stephen Vargas

US Patent:

6602966, Aug 5, 2003

Filed:

Jul 11, 2002

Appl. No.:

10/193506

Inventors:

Edward S. Vargas - Loveland OH
Michael W. Lynch - West Chester OH
Michael J. Ruda - Seabrook TX
Venki Chandrashekar - Houston TX

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F 244

US Classification:

526 64, 526 89, 526217, 526227, 526319, 526330, 526352

Abstract:

A process is provided for producing ethylene (co)polymer nanocomposites in a high pressure polymerization reactor. The process by which nanocomposites having organically modified clays incorporated and intimately dispersed therein involves polymerizing ethylene and one or more optional comonomers under high pressure polymerization conditions in the presence of an organic peroxide initiator and organically modified clay.

US Patent:

6844389, Jan 18, 2005

Filed:

Dec 20, 2001

Appl. No.:

10/027742

Inventors:

Sameer D. Mehta - Mason OH, US
Harilaos Mavridis - Cincinnati OH, US
Venki Chandrashekar - Houston TX, US
Edward S. Vargas - Loveland OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 334

US Classification:

524445, 524447, 524236, 524570, 524584, 525240

Abstract:

Ethylene polymer composites and concentrates utilized for their preparation are provided. The composites of the invention have increased melt strength compared to the base resin and other improved physical characteristics. The composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used.

US Patent:

7037970, May 2, 2006

Filed:

May 26, 2004

Appl. No.:

10/853917

Inventors:

Sameer D. Mehta - Mason OH, US
Harilaos Mavridis - Cincinnati OH, US
Venki Chandrashekar - Houston TX, US
Edward S. Vargas - Loveland OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08K 9/04
C08L 3/34
C08L 31/04

US Classification:

524445, 524563, 524586, 524236, 524251

Abstract:

Ethylene polymer composites, concentrates and a process utilized for their preparation are provided. The composites of the invention have increased melt strength compared to the base resin and other improved physical characteristics. The composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used.

US Patent:

7273914, Sep 25, 2007

Filed:

Aug 3, 2005

Appl. No.:

11/196639

Inventors:

Shaotian Wang - Mason OH, US
Barbara M. Tsuie - Cincinnati OH, US
Mark P. Mack - West Chester OH, US
Edward S. Vargas - Loveland OH, US
Debra L. Beran - Cincinnati OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F 4/52
C08F 4/76

US Classification:

526172, 526161, 526134, 526160, 526170, 526126, 502103, 502300, 502 84, 502 80

Abstract:

Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with the support-activator provides an unexpected boost in catalyst activity and gives polyolefins with high molecular weight and improved comonomer incorporation. In another method of the invention, an olefin is polymerized in the presence of an indenoindolyl metal alkylated complex and an agglomerated metal oxide/clay support-activator. Use of alkylated indenoindolyl complexes with the support-activators provides improved activity compared with metal halides.

US Patent:

7473745, Jan 6, 2009

Filed:

Sep 2, 2005

Appl. No.:

11/218888

Inventors:

Venki Chandrashekar - Houston TX, US
Mark P. Mack - West Chester OH, US
Charles S. Holland - Coal City IL, US
Natalia Nagy - Naperville IL, US
Sandor M. Nagy - Naperville IL, US
Edward S. Vargas - Loveland OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F 4/06

US Classification:

526 65, 526 73, 526 79, 526113, 526118, 526161, 526172, 5263482, 5263483, 5263486, 526352

Abstract:

Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C-Cα-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.

US Patent:

7723451, May 25, 2010

Filed:

Sep 4, 2007

Appl. No.:

11/899113

Inventors:

Sandor Nagy - Naperville IL, US
Barbara M. Tsuie - Cincinnati OH, US
Bradley P. Etherton - Cincinnati OH, US
Everett O. Lewis - Lake Jackson TX, US
Mark P. Mack - West Chester OH, US
Natalia Nagy - Naperville IL, US
Edward S. Vargas - Loveland OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F 4/64
C08F 4/642
C08F 4/6592
B01J 31/22

US Classification:

526160, 526161, 526170, 526172, 526348, 526943, 526131, 502103, 502152, 502155

Abstract:

A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an α-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.

US Patent:

7855255, Dec 21, 2010

Filed:

Dec 4, 2008

Appl. No.:

12/315552

Inventors:

Venki Chandrashekar - Houston TX, US
Mark P. Mack - West Chester OH, US
Charles S. Holland - Coal City IL, US
Natalia Nagy - Naperville IL, US
Sandor M. Nagy - Naperville IL, US
Edward S. Vargas - Loveland OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 23/04

US Classification:

525240

Abstract:

Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C-Cα-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.

US Patent:

8207248, Jun 26, 2012

Filed:

Feb 17, 2010

Appl. No.:

12/658905

Inventors:

Jeffrey C. Haley - Cincinnati OH, US
Edward S. Vargas - Loveland OH, US
Douglas D. Keller - Mason OH, US
Jeffrey J. Strebel - Cincinnati OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08K 5/34
C08K 5/00

US Classification:

524 88, 524 87

Abstract:

Disclosed is a colored high density polyethylene composition. The composition comprises a high density polyethylene, phthalocyanine blue, and talc. The composition exhibits reduced warpage in molded articles compared to those which do not contain talc. The composition is useful for injection molding and many other applications where a blue color is needed and low warpage is desired.