Patents by Inventor Kevin Richard Squire
Kevin Richard Squire 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: 7084223Abstract: The invention encompasses late transition metal catalyst systems immobilized on solid supports and their use in heterogenous polymerization processes, particularly in gas phase polymerization of olefin monomers. Preferred embodiments include a late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure immobilized on a solid porous metal or metalloid oxide particle support, particularly those comprising silica. The gas phase polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under gas phase polymerization conditions.Type: GrantFiled: May 4, 2004Date of Patent: August 1, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: George Alan Vaughan, Jo Ann Marie Canich, Phillip T. Matsunaga, David Edward Gindelberger, Kevin Richard Squire
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Patent number: 6812184Abstract: A late transition metal catalyst system for polymerization of olefin monomers is a Group 9, 10 or 11 metal complex stabilized by a bidentate ligand immobilized on a solid support where the late transition metal loading is less than 100 micromoles transition metal compound per gram of solid support. The bidentate ligand has the formula: wherein A is a bridging group containing a Group 13-15 element; each E is independently a Group 15 or 16 element bonded to M; each R is independently a C1-C30 containing radical or diradical group which is a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, hydrocarbyl-substituted organometalloid, halocarbyl-substituted organometalloid, m and n are independently 1 or 2 depending on the valency of E; and p is the charge on the bidentate ligand.Type: GrantFiled: June 17, 1997Date of Patent: November 2, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: George Alan Vaughan, Jo Ann Marie Canich, Phillip T. Matsunaga, David Edward Gindelberger, Kevin Richard Squire
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Publication number: 20040210014Abstract: The invention encompasses late transition metal catalyst systems immobilized on solid supports and their use in heterogenous polymerization processes, particularly in gas phase polymerization of olefin monomers. Preferred embodiments include a late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure immobilized on a solid porous metal or metalloid oxide particle support, particularly those comprising silica. The gas phase polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under gas phase polymerization conditions.Type: ApplicationFiled: May 4, 2004Publication date: October 21, 2004Inventors: George Alan Vaughan, Jo Ann Marie Canich, Phillip T. Matsunaga, David Edward Gindelberger, Kevin Richard Squire
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Patent number: 6492473Abstract: The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late transition metal catalyst systems, transition metal metallocene catalyst systems or Ziegler-Natta catalyst systems. Preferred embodiments include at least one late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure and at least one transition metal metallocene catalyst system comprising a Group 4 metal complex stabilized by at least one ancillary cyclopentadienyl ligand. The polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under polymerization conditions.Type: GrantFiled: August 8, 2000Date of Patent: December 10, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jo Ann Marie Canich, George Alan Vaughan, Phillip T. Matsunaga, David Edward Gindelberger, Timothy Daniel Shaffer, Kevin Richard Squire
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Patent number: 6194341Abstract: The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late transition metal catalyst systems, transition metal metallocene catalyst systems or Ziegler-Natta catalyst systems. Preferred embodiments include at least one late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure and at least one transition metal metallocene catalyst system comprising a Group 4 metal complex stabilized by at least one ancillary cyclopentadienyl ligand. The polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under polymerization conditions.Type: GrantFiled: June 17, 1997Date of Patent: February 27, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Jo Ann Marie Canich, George Alan Vaughan, Phillip T. Matsunaga, David Edward Gindelberger, Timothy Daniel Shaffer, Kevin Richard Squire
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Patent number: 6127497Abstract: The invention encompasses late transition metal catalyst systems and their use in polymerization processes, particularly in solution, 2-phase suspension and super-critical phase polymerization of ethylene-containing polymers. Preferred embodiments include the use of a late transition metal catalyst system comprising a Group 8, 9, 10, or 11 metal complex stabilized by a bidentate ligand structure for polymerization under elevated ethylene pressure, or concentration, conditions.Type: GrantFiled: June 17, 1997Date of Patent: October 3, 2000Assignee: Exxon Chemical Patents Inc.Inventors: Phillip T. Matsunaga, Jo Ann Marie Canich, George Alan Vaughan, David Edward Gindelberger, Rinaldo Soria Schiffino, Kevin Richard Squire, Rolf Bodo Temme
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Patent number: 6100354Abstract: A process for preparing substantially random olefin copolymers containing geminally disubstituted olefin monomers is described. The geminally disubstituted olefin monomers can be represented by the generic formula R.sub.1 =R.sub.2 (R.sub.3)(R.sub.4), where R.sub.1 is CH.sub.2, R.sub.2 is C, and R.sub.3 and R.sub.4 are, independently, essentially linear hydrocarbyl groups having from 1 to 30 carbon atoms, or more, and containing one carbon atom bound directly to R.sub.2. The copolymers can be prepared by contacting at least one geminally disubstituted olefin monomer and one or more comonomers selected from the group consisting of ethylene and C.sub.3 -C.sub.20 .alpha.-olefins, optionally with one or more other coordination polymerizable monomers, with a active coordination catalyst system comprising a bridged bis(arylamido) Group 4 catalyst component.Type: GrantFiled: February 24, 1997Date of Patent: August 8, 2000Assignee: Exxon Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, Kevin Richard Squire
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Patent number: 5866665Abstract: Substantially random ethylene copolymers containing at least 3.0 mole percent of geminally disubstituted olefin monomers are described. The geminally disubstituted olefin monomers can be represented by the generic formula R.sub.1 =R.sub.2 (R.sub.3)(R.sub.4), where R.sub.1 is CH.sub.2, R.sub.2 is C, and R.sub.3 and R.sub.4 are, independently, essentially linear hydrocarbyl groups having from 1 to 30 carbon atoms, or more, and containing one carbon atom bound directly to R.sub.2. The copolymers can be prepared by coordination polymerization by means of contacting at least one geminally disubstituted olefin monomer and ethylene, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl, heteroatom-containing Group 4 transition metal catalyst component.Type: GrantFiled: October 28, 1997Date of Patent: February 2, 1999Assignee: Exxon Chemical Patents, Inc.Inventors: Timothy Daniel Shaffer, Jo Ann Marie Canich, Kevin Richard Squire
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Patent number: 5763556Abstract: Substantially random ethylene copolymers containing at least 3.0 mole percent of geminally disubstituted olefin monomers are described. The geminally disubstituted olefin monomers can be represented by the generic formula R.sub.1 =R.sub.2 (R.sub.3)(R.sub.4), where R.sub.1 is CH.sub.2, R.sub.2 is C, and R.sub.3 and R.sub.4 are, independently, essentially linear hydrocarbyl groups having from 1 to 30 carbon atoms, or more, and containing one carbon atom bound directly to R.sub.2. The copolymers can be prepared by coordination polymerization by means of contacting at least one geminally disubstituted olefin monomer and ethylene, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl, heteroatom-containing Group 4 transition metal catalyst component.Type: GrantFiled: May 21, 1996Date of Patent: June 9, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, Jo Ann Marie Canich, Kevin Richard Squire