Patents by Inventor Pradeep P. Shirodkar

Pradeep P. 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).

  • Patent number: 11180644
    Abstract: The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190° C. of at least 130,000 Pa·s; and g) a phase angle of Z° or less where Z=138.3G*(?0.142), where G* is the complex modulus reported in Pascals measured at 190° C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: November 23, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jianya Cheng, Pradeep P. Shirodkar, Peijun Jiang, Johannes M. Soulages
  • Patent number: 10836853
    Abstract: A crack-resistant article comprising a diene terpolymer, the diene terpolymer comprising (or consisting essentially of) from 0.01 wt % to 10.0 wt % diene derived units, and 1.0 wt % to 20 wt % of C4 to C10 ?-olefin derived units based on the weight of the diene terpolymer, wherein the diene terpolymer: a) has a g?vis of less than 0.90; b) has an Mw within a range of from 100,000 g/mol to 500,000 g/mol; c) has an Mw/Mn within the range of from 3.5 to 12.0; and d) an Mz/Mn of greater than 7.0. Inventive articles comprise a blend of a relatively high density linear polyethylene and the diene terpolymer.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: November 17, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jianya Cheng, Pradeep P. Shirodkar, Peijun Jiang, Andrew Takacs
  • Patent number: 10822479
    Abstract: A foamable or foamed article comprising a diene terpolymer, the diene terpolymer comprising (or consisting essentially of) from 0.01 wt % to 10.0 wt % diene derived units, and 1.0 wt % to 20 wt % of C4 to C10 ?-olefin derived units based on the weight of the diene terpolymer, wherein the diene terpolymer: a) has a g?vis of less than 0.90; b) has an Mw within a range of from 100,000 g/mol to 500,000 g/mol; c) has an Mw/Mn within the range of from 3.5 to 12.0; and d) an Mz/Mn of greater than 7.0. Inventive articles comprise a blend of a relatively high density linear polyethylene and the diene terpolymer.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: November 3, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Pradeep P. Shirodkar, Jianya Cheng, Joseph M. Tomei, Peijun Jiang, Arturo Leyva
  • Publication number: 20190322848
    Abstract: The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190° C. of at least 130,000 Pa·s; and g) a phase angle of Z° or less where Z=138.3G*(?0.142), where G* is the complex modulus reported in Pascals measured at 190° C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.
    Type: Application
    Filed: July 3, 2019
    Publication date: October 24, 2019
    Inventors: Jianya Cheng, Pradeep P. Shirodkar, Peijun Jiang, Johannes M. Soulages
  • Patent number: 9745461
    Abstract: 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: Grant
    Filed: June 26, 2014
    Date of Patent: August 29, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Sunny Jacob, Peijun Jiang, Aspy K. Mehta, Pradeep P. Shirodkar, Armenag H. Dekmezian
  • Patent number: 9644092
    Abstract: A heterogeneous in-situ polymer blend comprising a continuous phase comprising a polypropylene having a crystallinity of at least 30% and a melting point temperature Tm greater than 130° C., and a heat of fusion ?Hf greater than 65 J/g; 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 comprising ethylene units and 0.001 to 5 wt % diene by weight of the copolymer, and having a crystallinity of less than 20% and being at least partially cross-linked such that the degree of cross-link is at least 20%.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: May 9, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Armenag Dekmezian, Aspy K. Mehta, Sunny Jacob, Andrew G. Narvaez, Jr., Pradeep P. Shirodkar, Weiqing Weng
  • Patent number: 9580533
    Abstract: The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a g?vis of less than 0.97, wherein the ethylene polymer has a g?vis of at least 0.01 units higher than the g?vis of the branched modifier.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: February 28, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Kevin R. Squire, Jianya Cheng, Pradeep P. Shirodkar, Johannes M. Soulages, Keith E. Jolibois, Ronald R. Thackston, Andrew G. Narvaez, Jr.
  • Patent number: 9527933
    Abstract: This invention relates to blends of polyalphaolefins (PAOs) and polyhydrosilane-modified polyolefins, methods to prepare the blends and methods to prepare polyhydrosilane-modified polyolefins.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: December 27, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rahul R. Kulkarni, Pradeep P. Shirodkar, Jianya Cheng, Donna J. Crowther
  • Patent number: 9458310
    Abstract: The present invention relates to polyethylene compositions comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, in particular, this invention further relates to polyethylene blends comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, wherein the modifier has: 1) a g? value less than 0.75; 2) a Cayley tree topology with a layer number of 2 or more more; and 3) a average Mw between the branch points of 1,500 g/mol or more.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: October 4, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Pradeep P. Shirodkar, Jianya J. Cheng, Andy H. Tsou, Pamela J. Wright, Johannes M. Soulages
  • Publication number: 20160272798
    Abstract: The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190° C. of at least 130,000 Pa·s; and g) a phase angle of Z° or less where Z=138.3 G*(?0.142), where G* is the complex modulus reported in Pascals measured at 190° C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 22, 2016
    Inventors: Jianya Cheng, Pradeep P. Shirodkar, Peijun Jiang, Johannes M. Soulages
  • Patent number: 9340664
    Abstract: The present invention relates to a blown film comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.90 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 3.0 or more; d) an Mz/Mn of 7.0 or more; e) optionally, an Mz of 2,000,000 g/mol or less; and f) a shear thinning ratio of 40 or more.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: May 17, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Pradeep P. Shirodkar, Jianya Cheng, Peijun Jiang
  • Patent number: 9321911
    Abstract: The present invention relates to a cast film comprising a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.90 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 3.0 or more; d) an Mz/Mn of 7.0 or more; e) a shear thinning ratio of 40 or more; and f) an I21 of 20 dg/min or less; where the film has at least a 10% reduction in neck-in as compared to the same composition formed into a film under the same conditions, except that the branched modifier is absent.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: April 26, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Pradeep P. Shirodkar, Jianya Cheng, Peijun Jiang, Arturo Leyva, Steven A. Best
  • Publication number: 20150125645
    Abstract: A crack-resistant article comprising a diene terpolymer, the diene terpolymer comprising (or consisting essentially of) from 0.01 wt % to 10.0 wt % diene derived units, and 1.0 wt % to 20 wt % of C4 to C10 ?-olefin derived units based on the weight of the diene terpolymer, wherein the diene terpolymer: a) has a g?vis of less than 0.90; b) has an Mw within a range of from 100,000 g/mol to 500,000 g/mol; c) has an Mw/Mn within the range of from 3.5 to 12.0; and d) an Mz/Mn of greater than 7.0. Inventive articles comprise a blend of a relatively high density linear polyethylene and the diene terpolymer.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 7, 2015
    Inventors: Jianya Cheng, Pradeep P. Shirodkar, Peijun Jiang, Andrew Takacs
  • Publication number: 20150126634
    Abstract: A foamable or foamed article comprising a diene terpolymer, the diene terpolymer comprising (or consisting essentially of) from 0.01 wt % to 10.0 wt % diene derived units, and 1.0 wt % to 20 wt % of C4 to C10 ?-olefin derived units based on the weight of the diene terpolymer, wherein the diene terpolymer: a) has a g?vis of less than 0.90; b) has an Mw within a range of from 100,000 g/mol to 500,000 g/mol; c) has an Mw/Mn within the range of from 3.5 to 12.0; and d) an Mz/Mn of greater than 7.0. Inventive articles comprise a blend of a relatively high density linear polyethylene and the diene terpolymer.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 7, 2015
    Inventors: Pradeep P. Shirodkar, Jianya Cheng, Joseph M. Tomei, Peijun Jiang, Arturo Leyva
  • Patent number: 8993681
    Abstract: Provided is a dendritic ethylene polymer. The polymer is a dendritic polymer of an ethylene/alpha-olefin-diene copolymer and a vinyl-terminated polyethylene. There is also provided a process for making a dendritic ethylene polymer. The process includes the steps of preparing a dendritic ethylene polymer by reacting ethylene/alpha-olefin-diene copolymer with vinyl-terminated polyethylene in the presence of a radical source. There is also provided a blend and a blown film that include the dendritic ethylene polymer.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: March 31, 2015
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Andy H. Tsou, Shuji Luo, Donna J. Crowther, Gabor Kiss, Johannes M. Soulages, Pradeep P. Shirodkar
  • Publication number: 20140309358
    Abstract: 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: Application
    Filed: June 26, 2014
    Publication date: October 16, 2014
    Inventors: Sunny Jacob, Peijun Jiang, Aspy K. Mehta, Pradeep P. Shirodkar, Armenag H. Dekmezian
  • Publication number: 20140309359
    Abstract: A heterogeneous in-situ polymer blend comprising a continuous phase comprising a polypropylene having a crystallinity of at least 30% and a melting point temperature Tm greater than 130° C., and a heat of fusion ?Hf greater than 65 J/g; 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 comprising ethylene units and 0.001 to 5 wt % diene by weight of the copolymer, and having a crystallinity of less than 20% and being at least partially cross-linked such that the degree of cross-link is at least 20%.
    Type: Application
    Filed: June 26, 2014
    Publication date: October 16, 2014
    Inventors: Peijun Jiang, Armenag Dekmezian, Aspy K. Mehta, Sunny Jacob, Andrew G. Narvaez, Jr., Pradeep P. Shirodkar, Weiqing Weng
  • Patent number: 8796376
    Abstract: A functionalized polyolefin having one or more pyridazine moieties is disclosed herein. A method to produce the functionalized polyolefin is also disclosed. A composition including the functionalized polyolefin is also disclosed.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: August 5, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rahul R. Kulkarni, Pradeep P. Shirodkar, Alistair D. Westwood, Donna J. Crowther, Wei Tang
  • Publication number: 20140155553
    Abstract: The present invention relates to polyethylene compositions comprising one or more ethylene polymers and one or more HDPE modifiers, in particular, this invention further relates to polyethylene blends comprising one or more ethylene polymers and one or more HDPE modifiers, wherein the modifier has: 1) a density of greater than 0.94 g/cc; 2) a Mw/Mn greater than 5; 3) a melt index (ASTM 1238, 190° C., 2.16 kg) of less than 0.7 dg/min; and 4) a g?vis of 0.96 or less.
    Type: Application
    Filed: November 21, 2013
    Publication date: June 5, 2014
    Inventors: Pradeep P. Shirodkar, Jianya Cheng, Rahul R. Kulkarni
  • Publication number: 20140088213
    Abstract: This invention relates to blends of polyalphaolefins (PAOs) and polyhydrosilane-modified polyolefins, methods to prepare the blends and methods to prepare polyhydrosilane-modified polyolefins.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 27, 2014
    Inventors: Rahul R. Kulkarni, Pradeep P. Shirodkar, Jianya Cheng, Donna J. Crowther