Patents by Inventor Pradeep Shirodkar
Pradeep Shirodkar 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: 10253174Abstract: A heterogeneous vulcanized polymer blend comprising a continuous phase comprising a thermoplastic polypropylene having a crystallinity of at least 30% and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron. The elastomeric copolymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 80 wt % of the elastomeric copolymer is extractable in cyclohexane at 23° C.Type: GrantFiled: July 24, 2017Date of Patent: April 9, 2019Assignee: ExxonMobil Chemical Patents Inc.Inventors: Sunny Jacob, Peijun Jiang, Aspy K. Mehta, Pradeep Shirodkar, Armenag H. Dekmezian
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Publication number: 20180009976Abstract: A heterogeneous vulcanized polymer blend comprising a continuous phase comprising a thermoplastic polypropylene having a crystallinity of at least 30% and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron. The elastomeric copolymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 80 wt % of the elastomeric copolymer is extractable in cyclohexane at 23° C.Type: ApplicationFiled: July 24, 2017Publication date: January 11, 2018Inventors: Sunny Jacob, Peijun Jiang, Aspy K. Mehta, Pradeep Shirodkar, Armenag H. Dekmezian
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Patent number: 8038917Abstract: The present invention relates to a process for preparing a thermoplastic vulcanizate (TPV) comprising: contacting a thermoplastic polymer, a cross-linkable elastomer, at least one curative, and at least one cure activator in a solvent to form Composition A. The solvent is then removed, and thereafter the cross-linkable elastomer is at least partially cured. The average particle size of the cross-linkable elastomer is 10 microns or less after the solvent is removed.Type: GrantFiled: March 23, 2011Date of Patent: October 18, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Weiqing Weng, Sunny Jacob, Peijun Jiang, Armenag H. Dekmezian, Aspy K. Mehta, Peter W. Manders, Pradeep Shirodkar, Palanisamy Arjunan
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Publication number: 20110169199Abstract: The present invention relates to a process for preparing a thermoplastic vulcanizate (TPV) comprising: contacting a thermoplastic polymer, a cross-linkable elastomer, at least one curative, and at least one cure activator in a solvent to form Composition A. The solvent is then removed, and thereafter the cross-linkable elastomer is at least partially cured. The average particle size of the cross-linkable elastomer is 10 microns or less after the solvent is removed.Type: ApplicationFiled: March 23, 2011Publication date: July 14, 2011Inventors: Weiqing Weng, Sunny Jacob, Peijun Jiang, Armenag H. Dekmezian, Aspy K. Mehta, Peter W. Manders, Pradeep Shirodkar, Palanisamy Arjunan
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Patent number: 7935761Abstract: The present invention relates to a process for preparing a thermoplastic vulcanizate (TPV) comprising: contacting a thermoplastic polymer, a cross-linkable elastomer, at least one curative, and at least one cure activator in a solvent to form Composition A. The solvent is then removed, and thereafter the cross-linkable elastomer is at least partially cured. The average particle size of the cross-linkable elastomer is 10 microns or less after the solvent is removed.Type: GrantFiled: April 18, 2007Date of Patent: May 3, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Weiqing Weng, Sunny Jacob, Peijun Jiang, Armenag H. Dekmezian, Aspy K. Mehta, Peter W. Manders, Pradeep Shirodkar, Palanisamy Arjunan
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Publication number: 20080033127Abstract: This invention relates to a multiple phase polymerization process to produce polyolefins comprising contacting olefins and a homogeneous catalyst or catalyst system at a temperature between the melting point of the dry polymer and 80° C. below the melting point of the dry polymer in the presence of a fluorinated hydrocarbon. This invention also relates to a process to produce polyethylene comprising contacting a homogeneous catalyst or catalyst system with ethylene and from 0 to 40 weight % of one or more C3 to C40 olefin comonomer(s) in the presence of a fluorinated hydrocarbon and optionally a hydrocarbon solvent at a temperature below the reaction medium melting point.Type: ApplicationFiled: June 20, 2005Publication date: February 7, 2008Inventors: Peijun Jiang, John Shutt, Charles Speed, Robert Hagerty, Pradeep Shirodkar
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Publication number: 20070293638Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and provide polymer products that can be manufactured to relatively low densities. The invention is particularly beneficial in the production of ethylene based polymers using chromium catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: December 20, 2007Applicant: EXXONMOBIL CHEMICAL PATENTS INC.Inventors: Robert Hagerty, Chia Chee, Randall Laird, Michael Risch, Pradeep Shirodkar, Zerong Lin, Larry Iaccino
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Publication number: 20070284787Abstract: The present invention relates to a process for preparing a thermoplastic vulcanizate (TPV) comprising: contacting a thermoplastic polymer, a cross-linkable elastomer, at least one curative, and at least one cure activator in a solvent to form Composition A. The solvent is then removed, and thereafter the cross-linkable elastomer is at least partially cured. The average particle size of the cross-linkable elastomer is 10 microns or less after the solvent is removed.Type: ApplicationFiled: April 18, 2007Publication date: December 13, 2007Inventors: Weiqing Weng, Sunny Jacob, Peijun Jiang, Armenag H. Dekmezian, Aspy K. Mehta, Peter W. Manders, Pradeep Shirodkar, Palanisamy Arjunan
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Publication number: 20070255017Abstract: This invention is directed to processes of making polymer in, the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for re-use in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene-ethylene based copolymers using Ziegler-Natta catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: November 1, 2007Inventors: Robert Hagerty, Randall Laird, Michael Risch, Pradeep Shirodkar, Peijun Jiang
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Publication number: 20070249763Abstract: This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to the recovery of the hydrofluorocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of ethylene based polymers using Ziegler Natta catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: October 25, 2007Inventors: Robert Hagerty, Chia Chee, Randall Laird, Michael Risch, Pradeep Shirodkar, Zerong Lin, Larry Iaccino
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Publication number: 20070225455Abstract: This invention relates to a continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor where a low crystallinity olefin polymer is produced in the presence of the semi-crystalline polymer, where a fluorinated hydrocarbon is present in the polymerization medium of the first reactor, the second reactor or both reactors.Type: ApplicationFiled: June 20, 2005Publication date: September 27, 2007Inventors: Peijun Jiang, John Shutt, Charles Speed, Pradeep Shirodkar, Hagerty Olds, Larry Iaccino
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Publication number: 20070208146Abstract: This invention is directed to processes of making polymer in the presence of a fluorinated hydrocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention is particularly beneficial in the production of propylene based polymers using Ziegler Natta catalyst systems.Type: ApplicationFiled: June 20, 2005Publication date: September 6, 2007Inventors: Robert Hagerty, Chia Chee, Randall Laird, Michael Risch, Pradeep Shirodkar, Peijun Jiang
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Publication number: 20070199218Abstract: An illuminable sign (1) including a plate (2) of a light-transmitting material, at least one three-dimensional body, such as a convex strip (7), also of a light-transmitting material, in the form of a symbol, lettering, decoration or the like, and positioned on or over a surface of the plate (2), and a light source (4). The light source (4) is positioned along at least part of an edge (3) of the plate (2), such that, when the light source (4) is switched on, light from the source (4) is coupled into the plate (2). The illuminable sign (1) closely resembles a neon sign.Type: ApplicationFiled: June 17, 2004Publication date: August 30, 2007Inventors: Peijun Jiang, John Shutt, Charles Speed, Robert Hagerty, Pradeep Shirodkar
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Publication number: 20070197753Abstract: This invention relates to a process to polymerize olefins comprising contacting a catalyst or catalyst system with olefin(s) in the presence of a fluorocarbon at a temperature above the onset melting point of the polymer. This invention also relates to a solution process to polymerize olefins comprising contacting a catalyst or catalyst system with olefin(s) in the presence of a fluorocarbon at a temperature above the onset melting point of the polymer.Type: ApplicationFiled: June 20, 2005Publication date: August 23, 2007Inventors: Peijun Jiang, John Shutt, Charles Speed, Robert Hagerty, Pradeep Shirodkar
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Publication number: 20070185289Abstract: This invention relates to a process to polymerize olefins comprising contacting, in a reactor, a pyridyl-di-imine compound and an activator with one or more olefin monomer(s) in the presence of a fluorinated hydrocarbon.Type: ApplicationFiled: June 20, 2005Publication date: August 9, 2007Inventors: Zerong Lin, Pradeep Shirodkar
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Publication number: 20060293462Abstract: A heterogeneous polymer blend comprises a continuous phase comprising a thermoplastic first polymer having a crystallinity of at least 30% and a dispersed phase comprising particles of a second polymer different from the first polymer dispersed in said continuous phase and having an average particle size of less than 5 micron. The second polymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 50 wt % of the second polymer is extractable in cyclohexane at 23° C.Type: ApplicationFiled: December 7, 2005Publication date: December 28, 2006Inventors: Sunny Jacob, Peijun Jiang, Aspy Mehta, Pradeep Shirodkar, Armenag Dekmezian
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Publication number: 20060293455Abstract: A heterogeneous polymer blend comprises a continuous phase comprising a thermoplastic first polymer having a crystallinity of at least 30% and a dispersed phase comprising particles of a second polymer different from the first polymer dispersed in said continuous phase, the second polymer having a crystallinity of less than 20% and being at least partially cross-linked, and the average particle size of the particles of the second polymer being less than 1 micron.Type: ApplicationFiled: June 16, 2006Publication date: December 28, 2006Inventors: Peijun Jiang, Armenag Dekmezian, Aspy Mehta, Sunny Jacob, Andrew Narvaez, Pradeep Shirodkar, Weiqing Weng
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Publication number: 20060293460Abstract: A heterogeneous polymer blend comprises a dispersed phase comprising a thermoplastic first polymer having a crystallinity of at least 30% and a continuous phase comprising a second polymer different from the first polymer. The second polymer has a crystallinity of less than 20% and is at least partially cross-linked.Type: ApplicationFiled: December 7, 2005Publication date: December 28, 2006Inventors: Sunny Jacob, Peijun Jiang, Aspy Mehta, Pradeep Shirodkar, Armenag Dekmezian
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Publication number: 20060293453Abstract: A homogeneous polymer blend comprises a thermoplastic first polymer having a crystallinity of at least 30%; and a second polymer having a crystallinity of more than 5% and being at least partially cross-linked.Type: ApplicationFiled: December 7, 2005Publication date: December 28, 2006Inventors: Peijun Jiang, Sunny Jacob, Pradeep Shirodkar, Armenag Dekmezian, Aspy Mehta
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Publication number: 20060293461Abstract: In a process for producing a heterogeneous polymer blend, at least one first monomer is polymerized in a first reaction zone in the presence of a supported catalyst to produce a thermoplastic first polymer having a crystallinity of at least 30%. At least part of said first polymer is then contacted with at least one second monomer and at least one polyene in a second reaction zone under conditions sufficient to polymerize said second monomer to produce a second polymer having a crystallinity of less than 20%. The second polymer is at least partially cross-linked in the second reaction zone such that at least a fraction of the second polymer is insoluble in xylene and such that the first and second polymers form different phases of the blend.Type: ApplicationFiled: December 7, 2005Publication date: December 28, 2006Inventors: Peijun Jiang, Aspy Mehta, Armenag Dekmezian, Sunny Jacob, Andrew Narvaez, Pradeep Shirodkar