Sameer D Mehta

US Patent:

6583209, Jun 24, 2003

Filed:

Sep 6, 2001

Appl. No.:

09/947836

Inventors:

Sameer D. Mehta - Mason OH
Harilaos Mavridis - Cincinnati OH

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 334

US Classification:

524445, 524236, 524570, 525 70

Abstract:

Propylene polymer composites containing modified clays and compatibilizing agents, more specifically hydrogenated tallow modified montmorillonite and maleic anhydride grafted propylene polymers, are provided. Concentrates or masterbatches used to prepare the composites are also described. The improved composites of the invention exhibit increased melt strength compared to the base resin and to composites similarly formulated using other types of modified clays. Moreover, the improved results are achievable at lower compatibilizer levels and lower ratios of compatibilizer to clay than has heretofore been considered practical.

US Patent:

6649698, Nov 18, 2003

Filed:

May 17, 2002

Appl. No.:

10/147843

Inventors:

Sameer D. Mehta - Mason OH

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 2300

US Classification:

525191, 525240

Abstract:

A blend comprising a high molecular weight, high density polyethylene (HMW HDPE) and a linear low density polyethylene (LLDPE) is disclosed. The blend comprises from about 50 wt. % to about 80 wt. % of HMW HDPE. The HMW HDPE has a density greater than about 0. 94 g/cc and a melt index MI less than about 0. 1 dg/min. The blend also comprises about 20 wt. % to about 50. wt % of LLDPE. The LLDPE has a density within the range of about 0. 90 to about 0. 93 g/cc and an MI within the range of about 0. 5 to about 5 dg/min. The LLDPE is a copolymer of ethylene with 1-hexene that has a dart drop impact strength of greater than about 500 grams as measured by ASTM D1709/A. The blend shows increased resistance to environmental stress cracking.

US Patent:

6656995, Dec 2, 2003

Filed:

Mar 12, 2002

Appl. No.:

10/096640

Inventors:

Douglas D. Klendworth - West Chester OH
Mark K. Reinking - Mason OH
Sameer D. Mehta - Mason OH

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 334

US Classification:

524445, 524582, 524570, 524236, 523333

Abstract:

A process for producing olefin polymer composites having improved melt strength and other improved physical characteristics is provided. The process is a solution process wherein an organically modified clay is intimately incorporated, at low levels and without the use of compatibilizing agents, into an olefin polymer base resin.

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:

6936671, Aug 30, 2005

Filed:

Oct 8, 2003

Appl. No.:

10/681657

Inventors:

Sameer D. Mehta - Mason OH, US
Mark K. Reinking - Mason OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F130/08

US Classification:

526279, 526352, 5261242, 5261243, 526110

Abstract:

A process for copolymerizing ethylene with vinylsilanes is disclosed. The process uses a Ziegler-Natta catalyst and cocatalyst wherein the Ziegler-Natta catalyst is prepared from a Group 4-6 halogen-containing transition metal and a mixture of an organomagnesium compound and a silicon-containing compound. Silane-functionalized polyolefins produced using the process can be crosslinkable and can be used to bond polyolefins to polysiloxanes or other functionalized polymers.

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:

7230054, Jun 12, 2007

Filed:

Jun 29, 2004

Appl. No.:

10/880263

Inventors:

Harilaos Mavridis - Cincinnati OH, US
Sameer D. Mehta - Mason OH, US
Mark P. Mack - West Chester OH, US
Philip J. Garrison - Houston TX, US
Michael W. Lynch - West Chester OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08L 23/00

US Classification:

525240, 525480, 525502 R

Abstract:

Resins comprising a relatively high-density, low-molecular-weight polyethylene component and a relatively low-density, high-molecular-weight ethylene copolymer component and methods of making the resins are disclosed. The rheological polydispersity of the high-density component exceeds that of either the resin or the low-density component. The resins are valuable for making films, sheets, coatings, pipes, fibers, and molded articles having a favorable balance of good stiffness and excellent environmental stress crack resistance.

US Patent:

7348371, Mar 25, 2008

Filed:

Dec 20, 2005

Appl. No.:

11/312617

Inventors:

Sameer D. Mehta - Mason OH, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08K 11/00

US Classification:

524 13, 524 15, 524502, 524506, 524515, 524521, 525100, 525106, 525191, 525209, 5253265

Abstract:

Cellulosic-reinforced composites having increased resistance to water absorption are provided. The improved composites are obtained using a mixture of high density polyethylene and silane copolymer with the cellulosic filler.