Patents by Inventor Gregory G. Hlatky
Gregory G. Hlatky 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).
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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
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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
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Patent number: 6995220Abstract: A process for polymerizing ethylene is disclosed. The ethylene is polymerized with a catalyst system which comprises an activator and an indeno[2,1-b]indolyl Group 4-6 transition metal complex having open architecture. The process gives polyethylene having a broad molecular weight distribution for improved processability.Type: GrantFiled: April 29, 2004Date of Patent: February 7, 2006Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Gregory G. Hlatky
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Patent number: 6939930Abstract: A process for polymerizing olefins is disclosed. The process uses a hydrosilane in a polymerization catalyzed by an open architecture, bridged indenoindolyl organometallic complex and an activator. Polyolefins from the process have increased molecular weight.Type: GrantFiled: September 9, 2003Date of Patent: September 6, 2005Assignee: Equistar Chemicals, LPInventors: Mark K. Reinking, Gregory G. Hlatky
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Patent number: 6864210Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and a bimetallic complex that incorporates two Group 3 to 10 transition metal atoms, which may be the same or different, and a neutral or anionic indigoid ligand. By proper selection of the indigoid skeleton and by modifying its substituents and transition metal centers, polyolefin makers can fine-tune the bimetallic complexes to control activity, enhance comonomer incorporation, and optimize polymer properties.Type: GrantFiled: February 6, 2003Date of Patent: March 8, 2005Assignee: Equistar Chemicals, LPInventors: Gregory G. Hlatky, Jonathan L. Schuchardt
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Patent number: 6838410Abstract: A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an ?-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having “open architecture.” The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw>100K) and very low densities (<0.910 g/cm3). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described. Additionally, supported and unsupported indeno[1,2-b]indolyl catalysts provide exceptional activities in the preparation of elastomeric polypropylene and ethylene copolymers.Type: GrantFiled: March 5, 2003Date of Patent: January 4, 2005Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Clifford C. Lee, Mark P. Mack, Gregory G. Hlatky, Sandor Nagy, Barbara M. Tsuie, Craig C. Meverden
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Patent number: 6818713Abstract: A process for polymerizing ethylene is disclosed. The process uses a catalyst system which has a supported open architecture indenoindolyl complex. We surprisingly found that modifying the open architecture complex to incorporate a C6-C20 hydrocarbyl amido group enables the production of polyethylene having good flow while maintaining high catalyst activity.Type: GrantFiled: August 11, 2003Date of Patent: November 16, 2004Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Gregory G. Hlatky
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Publication number: 20040157730Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and a bimetallic complex that incorporates two Group 3 to 10 transition metal atoms, which may be the same or different, and a neutral or anionic indigoid ligand. By proper selection of the indigoid skeleton and by modifying its substituents and transition metal centers, polyolefin makers can fine-tune the bimetallic complexes to control activity, enhance comonomer incorporation, and optimize polymer properties.Type: ApplicationFiled: February 6, 2003Publication date: August 12, 2004Inventors: Gregory G. Hlatky, Jonathan L. Schuchardt
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Patent number: 6693155Abstract: A process for polymerizing propylene is disclosed. The propylene is polymerized with a catalyst system which comprises an activator and a [1,2-b]indenoindolyl Group 4-6 transition metal complex having open architecture. The process has high catalyst activity and gives high molecular weight elastomeric polypropylene.Type: GrantFiled: March 5, 2003Date of Patent: February 17, 2004Assignee: Equistar Chemicals, LPInventors: Craig C. Meverden, Gregory G. Hlatky, Shaotian Wang
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Publication number: 20040023791Abstract: A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an &agr;-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having “open architecture.” The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw>100K) and very low densities (<0.910 g/cm3). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described. Additionally, supported and unsupported indeno[1,2-b]indolyl catalysts provide exceptional activities in the preparation of elastomeric polypropylene and ethylene copolymers.Type: ApplicationFiled: March 5, 2003Publication date: February 5, 2004Inventors: Shaotian Wang, Clifford C. Lee, Mark P. Mack, Gregory G. Hlatky, Sandor Nagy, Barbara M. Tsuie, Craig C. Meverden
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Patent number: 6579957Abstract: Single-site catalysts useful for polymerizing olefins are disclosed. The catalysts incorporate a Group 3 to 10 transition, lanthanide, or actinide metal and an anionic thiopyran dioxide ligand. Because a wide variety of thiopyran dioxides are easy to prepare from commercially available starting materials, the invention enables the preparation of a new family of single-site catalysts.Type: GrantFiled: April 11, 2001Date of Patent: June 17, 2003Assignee: Equistar Chemicals, LPInventors: Gregory G. Hlatky, Sandor Nagy
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Patent number: 6559251Abstract: A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an &agr;-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having “open architecture.” The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw>100K) and very low densities (<0.910 g/cm3). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described.Type: GrantFiled: August 2, 2002Date of Patent: May 6, 2003Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Clifford C. Lee, Mark P. Mack, Gregory G. Hlatky, Sandor Nagy, Barbara M. Tsuie
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Patent number: 6495485Abstract: Single-site catalysts useful for polymerizing olefins are disclosed. The organometallic catalysts incorporate a Group 3 to 10 transition, lanthanide or actinide metal and a caged diimide ligand. The diimide ligands are made by a tandem Diels-Alder and photochemical [2+2] cycloaddition sequence to give a multicyclic dione, followed by condensation with a primary amine. Because a wide variety of caged diimide ligands are easy to prepare from commercially available dienes and dienophiles, the invention enables the preparation of a new family of single-site catalysts. Based on their unique structure and geometry, the catalysts offer polyolefin producers new ways to improve activity, control comonomer incorporation, or regulate polyolefin tacticity.Type: GrantFiled: April 8, 2002Date of Patent: December 17, 2002Assignee: Equistar Chemicals, LPInventors: Gregory G. Hlatky, Jonathan L. Schuchardt
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Publication number: 20020156211Abstract: Single-site catalysts useful for polymerizing olefins are disclosed. The catalysts incorporate a Group 3 to 10 transition, lanthanide, or actinide metal and an anionic thiopyran dioxide ligand. Because a wide variety of thiopyran dioxides are easy to prepare from commercially available starting materials, the invention enables the preparation of a new family of single-site catalysts.Type: ApplicationFiled: April 11, 2001Publication date: October 24, 2002Inventors: Gregory G. Hlatky, Sandor Nagy
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Patent number: 6455704Abstract: Base-free carbazolides are prepared rapidly and in high yield and purity by reaction of a carbazole reactant with alkyl lithium in the presence of a dibasic ligand to form an intermediate complex, followed by reacting the intermediate complex with alkali metal alkoxide.Type: GrantFiled: September 6, 2001Date of Patent: September 24, 2002Assignee: Equistar Chemicals L.P.Inventor: Gregory G. Hlatky
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Publication number: 20020115561Abstract: Single-site catalysts useful for polymerizing olefins are disclosed. The organometallic catalysts incorporate a Group 3 to 10 transition, lanthanide or actinide metal and a caged diimide ligand. The diimide ligands are made by a tandem Diels-Alder and photochemical [2+2] cycloaddition sequence to give a multicyclic dione, followed by condensation with a primary amine. Because a wide variety of caged diimide ligands are easy to prepare from commercially available dienes and dienophiles, the invention enables the preparation of a new family of single-site catalysts. Based on their unique structure and geometry, the catalysts offer polyolefin producers new ways to improve activity, control comonomer incorporation, or regulate polyolefin tacticity.Type: ApplicationFiled: April 8, 2002Publication date: August 22, 2002Applicant: EQUISTAR CHEMICALS, L.P.Inventors: Gregory G. Hlatky, Jonathan L. Schuchardt
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Patent number: 6414099Abstract: Single-site catalysts useful for polymerizing olefins are disclosed. The organometallic catalysts incorporate a Group 3 to 10 transition, lanthanide or actinide metal and a caged diimide ligand. The diimide ligands are made by a tandem Diels-Alder and photochemical [2+2] cycloaddition sequence to give a multicyclic dione, followed by condensation with a primary amine. Because a wide variety of caged diimide ligands are easy to prepare from commercially available dienes and dienophiles, the invention enables the preparation of a new family of single-site catalysts. Based on their unique structure and geometry, the catalysts offer polyolefin producers new ways to improve activity, control comonomer incorporation, or regulate polyolefin tacticity.Type: GrantFiled: October 18, 2000Date of Patent: July 2, 2002Assignee: Equistar Chemicals, LPInventors: Gregory G. Hlatky, Jonathan L. Schuchardt
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Patent number: 6391988Abstract: The present invention provides an olefin polymerization procatalyst that includes at least one multidentate ligand. The pro-catalyst includes a Group 3 to 10 transition or lanthanide meta and one or more anionic or neutral ligands in an amount that satisfies the valency of the metal such that the pro-catalyst has a net zero charge. The present invention also discloses a method for making the pro-catalyst.Type: GrantFiled: April 18, 2001Date of Patent: May 21, 2002Assignee: Equistar Chemicals L.P.Inventor: Gregory G. Hlatky
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Patent number: 6384229Abstract: Neutral, multidentate azacyclic ligands and Group 3-10 transition metal complexes that contain them are disclosed. The ligands have the general formula: Ra—A—(L)b where R is hydrogen or hydrocarbyl, A is silicon, tin, germanium, or lead, each L is a pyrazolyl, triazolyl, or tetraazolyl group, a=0 to 2, b=2 to 4, and a+b=4. When used with common activators, the transition metal complexes provide excellent single-site catalysts for olefin polymerization.Type: GrantFiled: October 4, 2000Date of Patent: May 7, 2002Assignee: Equistar Chemicals, L.P.Inventor: Gregory G. Hlatky
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Patent number: 6331601Abstract: A process for making a supported, single-site catalyst is disclosed. The transition metal of the catalyst is tethered through a bridged, bidentate ligand that is covalently bound to the support. The catalyst is prepared in a two-step process that involves preparation of a supported ligand from an amine-functionalized support, followed by reaction of the supported ligand with a transition metal compound to give the “tethered”catalyst. An olefin polymerization process that uses the supported catalyst is also disclosed.Type: GrantFiled: January 27, 2000Date of Patent: December 18, 2001Assignee: Equistar Chemicals, LPInventor: Gregory G. Hlatky