Patents by Inventor Jonathan L. Schuchardt
Jonathan L. Schuchardt 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: 6875830Abstract: A single-site catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an optional activator and a complex that incorporates a Group 3 to 10 transition metal and at least one neutral or anionic chelating pyrimidine ligand. The ligands are easy to make, and they are readily incorporated into transition metal complexes, including those based on late transition metals. By modifying the chelating groups and other substituents on the pyrimidine ring, polyolefin makers can increase catalyst activity and control polymer properties.Type: GrantFiled: June 20, 2002Date of Patent: April 5, 2005Assignee: Equistar Chemicals, LPInventor: Jonathan L. Schuchardt
-
Patent number: 6875879Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and an organometallic complex that incorporates a Group 3 to 10 transition metal and at least one chelating, dianionic triquinane ligand. The cis,syn,cis-triquinane framework is generated in three high-yield steps from inexpensive starting materials, and with heat and light as the only reagents. By modifying substituents on the triquinane ligand, polyolefin makers can control catalyst activity, comonomer incorporation, and polymer properties.Type: GrantFiled: October 14, 2003Date of Patent: April 5, 2005Assignee: Equistar Chemicals, LPInventor: Jonathan L. Schuchardt
-
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
-
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
-
Patent number: 6774078Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system includes an organometallic complex that incorporates a Group 3 to 10 transition metal and an annulated cyclopentadienyl ligand that is pi-bonded to the metal. A one-pot method for making organometallic complexes from fulvene precursors is also disclosed. Additionally, the invention includes bimetallic complexes from cyclopentazulenyl compounds and a one-pot method for making them. Molecular modeling studies reveal that organometallic complexes incorporating such annulated cyclopentadienyl ligands, when combined with an activator such as MAO, should actively polymerize olefins.Type: GrantFiled: April 23, 2003Date of Patent: August 10, 2004Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Barbara M. Tsuie, Jonathan L. Schuchardt
-
Publication number: 20040077808Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and an organometallic complex that incorporates a Group 3 to 10 transition metal and at least one chelating, dianionic triquinane ligand. The cis,syn,cis-triquinane framework is generated in three high-yield steps from inexpensive starting materials, and with heat and light as the only reagents. By modifying substituents on the triquinane ligand, polyolefin makers can control catalyst activity, comonomer incorporation, and polymer properties.Type: ApplicationFiled: October 14, 2003Publication date: April 22, 2004Applicant: EQUISTAR CHEMICALS, LPInventor: Jonathan L. Schuchardt
-
Patent number: 6713576Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system includes an organometallic complex that incorporates a Group 3 to 10 transition metal and an anionic, polycyclic, convex ligand. Molecular modeling results indicate that the complexes, when combined with an activator, should actively polymerize olefins. The convex ligand uniquely stabilizes the active site while simultaneously minimizing steric interference. Calculations predict that complexes based on ligands with a high curvature index will have favorable reactivities with olefin monomers compared with similar complexes that incorporate Cp-like ligands.Type: GrantFiled: February 25, 2003Date of Patent: March 30, 2004Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Jonathan L. Schuchardt
-
Patent number: 6693154Abstract: A catalyst system useful for polymerizing olefins is disclosed. It comprises an activator and an organometallic complex. The complex includes a Group 3-10 transition or lanthanide metal and a 1,3-bis(arylimino)isoindoline or 1,3-bis(heteroarylimino)isoindoline ligand. Activities of the Group 8-10 catalyst systems rival or exceed those of late transition metal bis(imines). The resulting polyolefins typically have high molecular weights, broad molecular weight distributions, and a high degree of crystallinity, which makes them valuable for film applications.Type: GrantFiled: September 6, 2001Date of Patent: February 17, 2004Assignee: Equistar Chemicals, LPInventors: Jia-Chu Liu, Jonathan L. Schuchardt
-
Patent number: 6693157Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and an organometallic complex that incorporates a Group 3 to 10 transition metal and at least one chelating, dianionic triquinane ligand. The cis,syn,cis-triquinane framework is generated in three high-yield steps from inexpensive starting materials, and with heat and light as the only reagents. By modifying substituents on the triquinane ligand, polyolefin makers can control catalyst activity, comonomer incorporation, and polymer properties.Type: GrantFiled: April 8, 2002Date of Patent: February 17, 2004Assignee: Equistar Chemicals, LPInventor: Jonathan L. Schuchardt
-
Publication number: 20030191253Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and an organometallic complex that incorporates a Group 3 to 10 transition metal and at least one chelating, dianionic triquinane ligand. The cis,syn,cis-triquinane framework is generated in three high-yield steps from inexpensive starting materials, and with heat and light as the only reagents. By modifying substituents on the triquinane ligand, polyolefin makers can control catalyst activity, comonomer incorporation, and polymer properties.Type: ApplicationFiled: April 8, 2002Publication date: October 9, 2003Inventor: Jonathan L. Schuchardt
-
Patent number: 6544918Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and a complex that incorporates a Group 3 to 10 transition metal and at least one chelating dianionic bis(allyl) or bis(benzyl) ligand. The ligands are often easy to make, and they are readily incorporated into transition metal complexes. By modifying the structure of the dianionic ligand, polyolefin makers can control comonomer incorporation, catalyst activity, and polymer properties.Type: GrantFiled: July 17, 2001Date of Patent: April 8, 2003Assignee: Equistar Chemicals, LPInventors: Sandor Nagy, Karen L. Neal-Hawkins, Jonathan L. Schuchardt
-
Publication number: 20030065113Abstract: A catalyst system useful for polymerizing olefins is disclosed. It comprises an activator and an organometallic complex. The complex includes a Group 3-10 transition or lanthanide metal and a 1,3-bis(arylimino)isoindoline or 1,3-bis(heteroarylimino)isoindoline ligand. Activities of the Group 8-10 catalyst systems rival or exceed those of late transition metal bis(imines). The resulting polyolefins typically have high molecular weights, broad molecular weight distributions, and a high degree of crystallinity, which makes them valuable for film applications.Type: ApplicationFiled: September 6, 2001Publication date: April 3, 2003Inventors: Jia-Chu Liu, Jonathan L. Schuchardt
-
Publication number: 20030055276Abstract: A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and a complex that incorporates a Group 3 to 10 transition metal and at least one chelating dianionic bis(allyl) or bis(benzyl) ligand. The ligands are often easy to make, and they are readily incorporated into transition metal complexes. By modifying the structure of the dianionic ligand, polyolefin makers can control comonomer incorporation, catalyst activity, and polymer properties.Type: ApplicationFiled: July 17, 2001Publication date: March 20, 2003Inventors: Sandor Nagy, Karen L. Neal-Hawkins, Jonathan L. Schuchardt
-
Publication number: 20030013823Abstract: A single-site catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an optional activator and a complex that incorporates a Group 3 to 10 transition metal and at least one neutral or anionic chelating pyrimidine ligand. The ligands are easy to make, and they are readily incorporated into transition metal complexes, including those based on late transition metals. By modifying the chelating groups and other substituents on the pyrimidine ring, polyolefin makers can increase catalyst activity and control polymer properties.Type: ApplicationFiled: June 6, 2001Publication date: January 16, 2003Inventor: Jonathan L. Schuchardt
-
Publication number: 20030008987Abstract: A single-site catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an optional activator and a complex that incorporates a Group 3 to 10 transition metal and at least one neutral or anionic chelating pyrimidine ligand. The ligands are easy to make, and they are readily incorporated into transition metal complexes, including those based on late transition metals. By modifying the chelating groups and other substituents on the pyrimidine ring, polyolefin makers can increase catalyst activity and control polymer properties.Type: ApplicationFiled: June 20, 2002Publication date: January 9, 2003Applicant: EQUISTAR CHEMICALS, L.P.Inventor: Jonathan L. Schuchardt
-
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
-
Patent number: 6489414Abstract: A single-site catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an optional activator and a complex that incorporates a Group 3 to 10 transition metal and at least one neutral or anionic chelating pyrimidine ligand. The ligands are easy to make, and they are readily incorporated into transition metal complexes, including those based on late transition metals. By modifying the chelating groups and other substituents on the pyrimidine ring, polyolefin makers can increase catalyst activity and control polymer properties.Type: GrantFiled: June 6, 2001Date of Patent: December 3, 2002Assignee: Equistar Chemicals, LPInventor: Jonathan L. Schuchardt
-
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
-
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
-
Patent number: 5010047Abstract: A process for recovering double metal cyanide complex catalyst from a polymer such as polypropylene glycol in a form suitable for use as a polymerization catalyst is described. The process comprises the steps of (a) combining the polymer with a non-polar solvent to precipitate the catalyst and (b) filtering the resulting mixture in the presence of a filter aid to separate the polymer from the precipitated catalyst. In contrast to the prior art methods of catalyst removal, the process of the invention yields polymer uniformly low in color as well as recovered catalyst which may be reused in subsequent polymerizations.Type: GrantFiled: February 27, 1989Date of Patent: April 23, 1991Assignee: Arco Chemical Technology, Inc.Inventor: Jonathan L. Schuchardt