Patents by Inventor Jean Merrick-Mack
Jean Merrick-Mack has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8475898Abstract: Resin blends useful for pipe and blow-molded articles are disclosed. The blends comprise a low-molecular-weight, high-density polyethylene and a high-molecular-weight, low-density ethylene copolymer. The high-molecular-weight component is made with a bridged indenoindolyl Group 4 metal complex having open architecture. Blends of the invention uniquely have high molecular weight (Mw>200,000) and low levels of long-chain branching. A quick, convenient approach for estimating levels of long-chain branching in polyethylenes from gel permeation chromatography and dynamic oscillatory rheometry (“viscosity enhancement factor”) is disclosed.Type: GrantFiled: August 29, 2007Date of Patent: July 2, 2013Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Gregory G. Hlatky, Sebastian Joseph, Jean A. Merrick-Mack, Kenneth J. Klug, Wallace W. Yau
-
Patent number: 7855255Abstract: 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 C3-C10 ?-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.Type: GrantFiled: December 4, 2008Date of Patent: December 21, 2010Assignee: Equistar Chemicals, LPInventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, Jr., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack
-
Patent number: 7723451Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-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.Type: GrantFiled: September 4, 2007Date of Patent: May 25, 2010Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Barbara M. Tsuie, Bradley P. Etherton, Jean A. Merrick-Mack, Everett O. Lewis, Mark P. Mack, Natalia Nagy, Edward S. Vargas
-
Patent number: 7666961Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin and a catalyst comprising an activator and a supported bridged bis-indeno[2,1-b]indolyl zirconium complex. The process uses a highly active catalyst and provides polyethylene characterized by a high level of long-chain branching.Type: GrantFiled: September 4, 2007Date of Patent: February 23, 2010Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Barbara M. Tsuie, Jean A. Merrick-Mack, Natalia Nagy
-
Patent number: 7655740Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin and a catalyst comprising an activator and a supported bridged indeno[1,2-b]indolyl zirconium complex. The process produces polyethylene characterized by good incorporation of the ?-olefin and moderate long-chain branching. The process is capable of forming high molecular weight polyethylene and has good catalyst activity.Type: GrantFiled: September 4, 2007Date of Patent: February 2, 2010Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Barbara M. Tsuie, Jean A. Merrick-Mack, Natalia Nagy
-
Patent number: 7538173Abstract: Ethylene copolymers valuable for films, coatings, sheets, and molded articles are disclosed. Some of the copolymers have a long-chain-branching index from 0.25 to 0.60 and a gpcBR index from 0.1 to 0.7. Others have a primary DSC melting point that is less than its secondary DSC melting point. Also disclosed is LLDPE in which the weight percentage of the low-temperature elution fraction exceeds that of the high-temperature fraction, and wherein the Mw of the low-temperature fraction exceeds that of the high-temperature fraction. The ethylene copolymers process easily, even at low melt indices, and films from the copolymers have high stiffness, good impact resistance, and high heat-seal strength over a wide temperature range.Type: GrantFiled: November 21, 2005Date of Patent: May 26, 2009Assignee: Equistar Chemicals LPInventors: Thomas J. Schwab, Jean A. Merrick-Mack, Wallace W. Yau, Kelly L. Williams
-
Publication number: 20090099316Abstract: 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 C3-C10 ?-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.Type: ApplicationFiled: December 4, 2008Publication date: April 16, 2009Inventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, JR., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack
-
Publication number: 20090062488Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin and a catalyst comprising an activator and a supported bridged indeno[1,2-b]indolyl zirconium complex. The process produces polyethylene characterized by good incorporation of the ?-olefin and moderate long-chain branching. The process is capable of forming high molecular weight polyethylene and has good catalyst activity.Type: ApplicationFiled: September 4, 2007Publication date: March 5, 2009Inventors: Sandor Nagy, Barbara M. Tsuie, Jean A. Merrick-Mack, Natalia Nagy
-
Publication number: 20090062490Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-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.Type: ApplicationFiled: September 4, 2007Publication date: March 5, 2009Inventors: Sandor Nagy, Barbara M. Tsuie, Bradley P. Etherton, Jean A. Merrick-Mack, Everett O. Lewis, Mark P. Mack, Natalia Nagy, Edward S. Vargas
-
Publication number: 20090061135Abstract: Resin blends useful for pipe and blow-molded articles are disclosed. The blends comprise a low-molecular-weight, high-density polyethylene and a high-molecular-weight, low-density ethylene copolymer. The high-molecular-weight component is made with a bridged indenoindolyl Group 4 metal complex having open architecture. Blends of the invention uniquely have high molecular weight (Mw>200,000) and low levels of long-chain branching. A quick, convenient approach for estimating levels of long-chain branching in polyethylenes from gel permeation chromatography and dynamic oscillatory rheometry (“viscosity enhancement factor”) is disclosed.Type: ApplicationFiled: August 29, 2007Publication date: March 5, 2009Inventors: Shaotian Wang, Gregory G. Hlatky, Sebastian Joseph, Jean A. Merrick-Mack, Kenneth J. Klug, Wallace W. Yau
-
Publication number: 20090062489Abstract: A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of an ?-olefin and a catalyst comprising an activator and a supported bridged bis-indeno[2,1-b]indolyl zirconium complex. The process uses a highly active catalyst and provides polyethylene characterized by a high level of long-chain branching.Type: ApplicationFiled: September 4, 2007Publication date: March 5, 2009Inventors: Sandor Nagy, Barbara M. Tsuie, Jean A. Merrick-Mack, Natalia Nagy
-
Patent number: 7473745Abstract: 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 C3-C10 ?-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.Type: GrantFiled: September 2, 2005Date of Patent: January 6, 2009Assignee: Equistar Chemicals, LPInventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, Jr., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack
-
Patent number: 7423098Abstract: An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10 alpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields medium density and linear low density polyethylene having a bimodal molecular weight distribution and a melt index from about 0.10 to about 0.80. Films from the polyethylene have superior impact properties.Type: GrantFiled: January 17, 2006Date of Patent: September 9, 2008Assignee: Equistar Chemicals, LPInventors: Philip J. Garrison, Charles S. Holland, Mark P. Mack, Linda N. Winslow, Everett O. Lewis, James R. Clark, Leonard V. Cribbs, Bradley P. Etherton, Jean A. Merrick-Mack, Paula L. Nygard
-
Publication number: 20070167585Abstract: An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10 alpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields medium density and linear low density polyethylene having a bimodal molecular weight distribution and a melt index from about 0.10 to about 0.80. Films from the polyethylene have superior impact properties.Type: ApplicationFiled: January 17, 2006Publication date: July 19, 2007Inventors: Philip Garrison, Charles Holland, Mark Mack, Linda Winslow, Everett Lewis, James Clark, Leonard Cribbs, Bradley Etherton, Jean Merrick-Mack, Paula Nygard
-
Publication number: 20070117946Abstract: Ethylene copolymers valuable for films, coatings, sheets, and molded articles are disclosed. Some of the copolymers have a long-chain-branching index from 0.25 to 0.60 and a gpcBR index from 0.1 to 0.7. Others have a primary DSC melting point that is less than its secondary DSC melting point. Also disclosed is LLDPE in which the weight percentage of the low-temperature elution fraction exceeds that of the high-temperature fraction, and wherein the Mw of the low-temperature fraction exceeds that of the high-temperature fraction. The ethylene copolymers process easily, even at low melt indices, and films from the copolymers have high stiffness, good impact resistance, and high heat-seal strength over a wide temperature range.Type: ApplicationFiled: November 21, 2005Publication date: May 24, 2007Inventors: Thomas Schwab, Jean Merrick-Mack, Wallace Yau, Kelly Williams
-
Publication number: 20070055021Abstract: 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 C3-C10 ?-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.Type: ApplicationFiled: September 2, 2005Publication date: March 8, 2007Inventors: Venki Chandrashekar, Mark Mack, Charles Gates, Charles Holland, Natalia Nagy, Sandor Nagy, Edward Vargas, Jean Merrick-Mack
-
Patent number: 6908972Abstract: A method for making ethylene polymers and copolymers is disclosed. The method uses a catalyst system comprising a low level of an aluminum-containing activator, a bridged indenoindolyl transition metal complex, and a treated silica support. The method enables economical preparation of ethylene copolymers having very low density. The silica-supported, bridged complexes incorporate comonomers efficiently and are valuable for a commercial slurry loop process. Use of a bridged indeno[2,1-b]indolyl complex provides exceptionally efficient comonomer incorporation, and gives polymers with a substantial and controlled level of long-chain branching. The method facilitates the production of a wide variety of polyolefins, from HDPE to plastomers.Type: GrantFiled: April 16, 2002Date of Patent: June 21, 2005Assignee: Equistar Chemicals, LPInventors: Barbara M. Tsuie, Karen L. Neal-Hawkins, Sandor Nagy, Michael W. Lynch, Mark P. Mack, Shaotian Wang, Jean A Merrick-Mack, Clifford C. Lee, Joel A. Mutchler, Kenneth W. Johnson
-
Patent number: 6770715Abstract: A high molecular weight, medium density polyethylene (HMW, MDPE) is disclosed. The polyethylene comprises from about 85 to about 98 wt % of recurring units of ethylene and about 2 to about 15 wt % of a C3-C10 &agr;-olefin. It has a density from about 0.92 to about 0.944 g/cc, a melt index MI2 from about 0.01 to about 0.5 dg/min, and a melt flow ratio MFR from about 50 to about 300. It has a multimodal molecular weight distribution comprising a high molecular weight component and a low molecular weight component. The low molecular weight component has an MI2 from about 50 to about 600 dg/min and a density from about 0.94 to about 0.97 g/cc. A process for making the medium density polyethylene is also disclosed. The process uses a Ziegler catalyst and applies multiple reaction zones.Type: GrantFiled: September 12, 2002Date of Patent: August 3, 2004Assignee: Equistar Chemicals, LPInventors: Philip J. Garrison, Lawrence R. Wallace, Danny L. Wise, James H. Meas, Leonard V. Cribbs, Jean A. Merrick-Mack, Paula L. Nygard
-
Patent number: 6664349Abstract: An ethylene polymerization process is disclosed. The process uses a single-site catalyst that contains a boraaryl ligand. It comprises supporting the catalyst, forming a slurry of the supported catalyst in an organic solvent, mixing the catalyst slurry with trialkyl aluminum compound, and polymerizing ethylene in the presence of the trialkyl aluminum-treated catalyst slurry. The process gives polyethylene having a controlled long-chain-branch index.Type: GrantFiled: March 29, 2001Date of Patent: December 16, 2003Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Jean A. Merrick-Mack
-
Publication number: 20030195306Abstract: A method for making ethylene polymers and copolymers is disclosed. The method uses a catalyst system comprising a low level of an aluminum-containing activator, a bridged indenoindolyl transition metal complex, and a treated silica support. The method enables economical preparation of ethylene copolymers having very low density. The silica-supported, bridged complexes incorporate comonomers efficiently and are valuable for a commercial slurry loop process. Use of a bridged indeno[2,1-b]indolyl complex provides exceptionally efficient comonomer incorporation, and gives polymers with a substantial and controlled level of long-chain branching. The method facilitates the production of a wide variety of polyolefins, from HDPE to plastomers.Type: ApplicationFiled: April 16, 2002Publication date: October 16, 2003Inventors: Barbara M. Tsuie, Karen L. Neal-Hawkins, Sandor Nagy, Michael W. Lynch, Mark P. Mack, Shaotian Wang, Jean A. Merrick-Mack, Clifford C. Lee, Joel A. Mutchler, Kenneth W. Johnson