Patents by Inventor Narayanaswami Raja Dharmarajan
Narayanaswami Raja Dharmarajan 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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Publication number: 20150240061Abstract: Provided are blend compositions comprising an ethylene copolymer and a polyalphaolefin having soft stretch elastic characteristics. The polymer compositions comprise (a) an ethylene copolymer and (b) from 0.5 wt % to 60 wt % polyalphaolefin. The ethylene copolymer comprises greater than 50 mole % ethylene-derived units and has (i) a density of less than or equal to 0.89 g/cm3, (ii) a Tm of at least 100° C., (iii) a Melt index of less than or equal to 7 dg/min, and (iv) a ?Tm,g of at least 140° C. The polyalphaolefin has (i) a Kinematic viscosity (Kv) at 100° C. of from 3 to 3000 cSt, (ii) a flash point of at least 200° C., and (iii) a pour point of less than or equal to ?10° C.Type: ApplicationFiled: January 20, 2015Publication date: August 27, 2015Inventors: Narayanaswami Raja Dharmarajan, Paul E. Rollin, JR.
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Patent number: 8927108Abstract: Inelastic film structures including at least one layer incorporating a combination of a first polymeric component that is at least one polymer incorporating propylene-derived units and a second polymeric component that is a thermoplastic polymer, for example, a polymer incorporating a polyolefin, are provided. The combination of the first polymeric component and the second polymeric component incorporates from about 40 wt. % to about 98 wt. % of the at least one polymer incorporating propylene-derived units and from about 2 wt. % to about 60 wt. % of the at least one polymer incorporating a polyolefin. The film structures are found to have properties making the structures useful for inclusion in a variety of applications. In certain embodiments, the film structures may exhibit optical clarity, tack, sealability, toughness, softness, and machinability properties superior to conventional polypropylene films and other conventional polyolefin films.Type: GrantFiled: December 15, 2006Date of Patent: January 6, 2015Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Michael Fiscus, Narayanaswami Raja Dharmarajan, Michael Charles Bulawa
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Patent number: 8829127Abstract: The invention relates to a continuous polymerization process for preparing a random ethylene interpolymer which comprises: (A) polymerizing ethylene, and an ?-olefin comonomer selected from propylene and/or 1-butene, and mixtures thereof, under continuous random polymerization conditions in the presence of single site catalyst system employing an ionic activator having cyclic ligands shielding a central charge bearing atom, at a temperature of 140° C. to 250° C. at a conversion of ethylene of 80 to 99% and a comonomer conversion of from at least 20%; and (B) devolatilizing the polymer to provide an ethylene copolymer having a density of from 0.85 to 0.92 g/cm3, an MI of from 0.01 to 100 g/10 min and an I21/I2 of from 30 to 400.Type: GrantFiled: August 7, 2012Date of Patent: September 9, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Rui Zhao, Bruce Allan Harrington, George James Pehlert, Periagaram S. Ravishankar, Kent L. Chasey
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Patent number: 8664129Abstract: Disclosed is a multilayer fabric and a method of forming a multilayer fabric comprising one or more facing layers and one or more elastic layers adjacent to or sandwiched there between, the one or more facing layers comprising a polypropylene; and a propylene-?-olefin elastomer having and an MFR of less than 80 dg/min; wherein the facing layer is extensible and non-elastic and has a Handle-O-Meter value of less than 60 g and a 1% Secant Flexural Modulus of less than 1000 MPa. In certain embodiments, polyethylenes are absent from the facing layer(s).Type: GrantFiled: November 14, 2008Date of Patent: March 4, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Prasadarao Meka
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Patent number: 8664320Abstract: A film composition comprising one or more propylene-based polymers and one or more hydrocarbon resins, and methods for making the same are provided. The propylene-based polymer may have (i) 60 wt % or more units derived from propylene, (ii) isotactically arranged propylene derived sequences, and (iii) a heat of fusion less than 65 J/g. The hydrocarbon resin may have a glass transition temperature greater than 20° C.Type: GrantFiled: December 7, 2012Date of Patent: March 4, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Michael Glenn Williams
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Publication number: 20130102732Abstract: A film composition comprising one or more propylene-based polymers and one or more hydrocarbon resins, and methods for making the same are provided. The propylene-based polymer may have (i) 60 wt % or more units derived from propylene, (ii) isotactically arranged propylene derived sequences, and (iii) a heat of fusion less than 65 J/g. The hydrocarbon resin may have a glass transition temperature greater than 20° C.Type: ApplicationFiled: December 7, 2012Publication date: April 25, 2013Applicant: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Michael Glenn Williams
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Patent number: 8354465Abstract: A film composition comprising one or more propylene-based polymers and one or more hydrocarbon resins, and methods for making the same are provided. The propylene-based polymer may have (i) 60 wt % or more units derived from propylene, (ii) isotactically arranged propylene derived sequences, and (iii) a heat of fusion less than 65 J/g. The hydrocarbon resin may have a glass transition temperature greater than 20° C.Type: GrantFiled: October 23, 2007Date of Patent: January 15, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, M. Glenn Williams
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Patent number: 8263722Abstract: The invention relates to a continuous polymerization process for preparing a random ethylene interpolymer with propylene and/or 1-butene which comprises: (A) polymerizing ethylene, and as an ?-olefin comonomer propylene and/or 1-butene under continuous random polymerization conditions in the presence of single site catalyst system employing an ionic activator having cyclic ligands shielding a central charge bearing atom, at a temperature of 140° C. to 250° C. at a conversion of ethylene of 80 to 99% and a comonomer conversion of from at least 30% and (B) devolatilizing the polymer to provide an ethylene copolymer having a density of from 0.85 to 0.92 g/cm3, an MI of from 0.01 to 100 g/10 min, preferably from 0.1 to 20, and an I21/I2 of from 30 to 400. The invention also relates to polymers made by such processes containing as ?-olefin comonomer propylene and/or 1-butene, having a density of from 0.85 to 0.92 g/cm3, an MI of from 0.Type: GrantFiled: March 21, 2005Date of Patent: September 11, 2012Assignee: Exxonmobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Rui Zhao, Bruce Allan Harrington, George James Pehlert, Periagaram S. Ravishankar, Kent L. Chasey
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Patent number: 8198373Abstract: Plastic toughened plastics include a polymer composition having a polypropylene component and a second polymer component. The polypropylene component is present in an amount from about 50 to about 95 weight percent based on the total weight of the blend. The second polymer component is present in an amount from about 5 to about 50 weight percent based on the total weight of the blend, is a BOCD or BCD blend of at least two ssPE components, and has an overall density greater than about 0.90 g/cm3. Optionally, the plastic toughened plastics include one or more third polymer component selected from propylene-olefin elastomers and ethylene-propylene rubbers, which are present in an amount from about 1 to about 50 weight percent, based on the total weight of the blend.Type: GrantFiled: October 2, 2006Date of Patent: June 12, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Patrick Brant, Bryan R. Chapman, Narayanaswami Raja Dharmarajan, Prasadarao Meka
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Patent number: 8101534Abstract: A non-woven fabric made from a composition prepared by combining a first propylene-based polymer blend, where the first polymer blend is prepared by combining a propylene-based elastomer with a propylene-based thermoplastic resin and where the first blend has an MFR (ASTM D-1238 2.16 kg @ 230° C.) equal to or less than 50 dg/min, with a second propylene-based polymer blend, where the second polymer blend is prepared by combining a propylene-based elastomer with a propylene-based thermoplastic resin and where said second blend has an MFR (ASTM D-1238 2.16 kg @ 230° C.) greater than 50 dg/min, where the propylene-based elastomers comprise from about 5% to 35% by weight units derived from ethylene or non-propylene alpha-olefin and have a heat of fusion, as determined by DSC, of less than 80 J/g, and where the propylene-based thermoplastic resins have a heat of fusion, as determined by DSC, equal to or greater than 80 J/g.Type: GrantFiled: November 9, 2007Date of Patent: January 24, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Vincent B. Gallez, Smita Kacker, Chia Yung Cheng
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Patent number: 8067501Abstract: A thermoplastic composition for cast and blown films and the resulting films thereof are provided. The film can include about 10 wt % to 80 wt % propylene-based copolymer having at least 50 wt % propylene-derived units and 5 wt % to 30 wt % alpha-olefin comonomer, based on the total weight of the polymer that exhibits a melting point of about 100° C. to 170° C., and a MFR of about 200 dg/min or less. The film can include about 20 wt % to 90 wt % polypropylene homopolymer having a melting point of about 140° C. to 190° C. The film can have a thickness of about 10 ?m to 100 ?m, a haze of 13% or less, a 1% MD Secant tensile modulus of 55,000 to 150,000 psi, a machine direction Elmendorf tear of at least 5 g/mil and a transverse direction Elemdorf tear of at least 300 g/mil, and a 45 degree gloss of at least 70.Type: GrantFiled: December 22, 2009Date of Patent: November 29, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Michael Fiscus, Narayanaswami Raja Dharmarajan, Michael Charles Bulawa, Michael Glenn Williams
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Patent number: 7985804Abstract: This invention relates to a composition comprising (a) from about 5 to about 50 weight % mEPDM; and (b) from about 95 weight % to about 50 weight % of a first mPE, wherein the weight % is based on the total weight of the mEPDM and the mPE. This invention further relates to films and articles made from the compositions and methods of making the compositions, films and articles.Type: GrantFiled: June 15, 2007Date of Patent: July 26, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Michael Fiscus, Narayanaswami Raja Dharmarajan
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Patent number: 7951732Abstract: Elastic laminates and articles for manufacture are provided. The elastic laminate can include one or more facing layers comprising one or more thermoplastic resins and one or more propylene-based polymers, and one or more inner layers comprising one or more propylene-based polymers. Each facing layer can include at least 50% by weight of the one or more propylene-based polymers where the propylene-based polymer has (i) 60 wt % or more units derived from propylene, (ii) isotactically arranged propylene derived sequences, and (iii) a heat of fusion less than 45 J/g.Type: GrantFiled: January 26, 2007Date of Patent: May 31, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Monica Gonzalez Correa, Vincent Bernard Benoît Ghislain Gallez
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Patent number: 7943701Abstract: A nonwoven fabric made from a composition comprising (a) a propylene-based elastomer characterized by including from about 5% to about 35% by weight units deriving from alpha-olefin and a heat of fusion, as determined by DSC, of less than 80 J/g, (b) a propylene-based thermoplastic polymer characterized by an MFR (ASTM D-1238 2.16 kg @ 230° C.) of from about 3 to about 300 dg/min, and a heat of fusion, as determined by DSC, of greater than 80 J/g, and (c) a feel modifier selected from the group consisting of (i) a high-MFR thermoplastic resin having an MFR (ASTM D-1238 2.16 kg @ 230° C.) in excess of 400 dg/min, (ii) a hydrocarbon resin, (iii) a polyolefin wax, (iv) a functionalized hydrocarbon resin, (v) a functionalized polyolefin, and (vi) a combination of two or more of the foregoing feel modifiers, and (d) optionally a slip aid.Type: GrantFiled: January 26, 2007Date of Patent: May 17, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Smita Kacker
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Patent number: 7902093Abstract: A nonwoven fabric and disposable articles comprising the same are provided. The nonwoven fabric can include one or more facing layers thermally bonded to one or more inner layers. The facing layers are inelastic or partially elastic nonwoven webs comprising one or more propylene-based polymers. The facing layer has a permanent set above 30%. The inner layers are elastic nonwoven webs comprising one or more propylene-based polymers and one or more slip agents. The inner layer has a permanent set below 28%, and the one or more propylene-based polymers have (i) 60 wt % or more units derived from propylene, (ii) isotactically arranged propylene derived sequences, and (iii) a heat of fusion less than 45 J/g.Type: GrantFiled: January 26, 2007Date of Patent: March 8, 2011Assignee: Exxonmobil Chemical Patents Inc.Inventors: Narayanaswami Raja Dharmarajan, Smita Kacker
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Patent number: 7794847Abstract: The present disclosure is directed to an electrical device comprising a propylene-alpha olefin polymer, wherein the propylene-alpha olefin polymer comprises from about 5 to about 25 wt % alpha olefin, from about 75 to about 95 wt % propylene and optionally ?10 wt % diene, wherein the propylene-alpha olefin polymer has a MWD of from about 1 to about 5, a heat of fusion less than or equal to 75 J/g and a Tm?105° C.Type: GrantFiled: November 14, 2006Date of Patent: September 14, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Kent Leon Chasey, Narayanaswami Raja Dharmarajan, Periagaram Srinivasan Ravishankar
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Publication number: 20100215933Abstract: A thermoplastic composition for cast and blown films and the resulting films thereof are provided. The film can include about 10 wt % to 80 wt % propylene-based copolymer having at least 50 wt % propylene-derived units and 5 wt % to 30 wt % alpha-olefin comonomer, based on the total weight of the polymer that exhibits a melting point of about 100° C. to 170° C., and a MFR of about 200 dg/min or less. The film can include about 20 wt % to 90 wt % polypropylene homopolymer having a melting point of about 140° C. to 190° C. The film can have a thickness of about 10 ?m to 100 ?m, a haze of 13% or less, a 1% MD Secant tensile modulus of 55,000 to 150,000 psi, a machine direction Elmendorf tear of at least 5 g/mil and a transverse direction Elemdorf tear of at least 300 g/mil, and a 45 degree gloss of at least 70.Type: ApplicationFiled: December 22, 2009Publication date: August 26, 2010Inventors: David Michael Fiscus, Narayanaswami Raja Dharmarajan, Michael Charles Bulawa, MIchael Glenn Williams
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Publication number: 20100125118Abstract: Plastic toughened plastics include a polymer composition having a polypropylene component and a second polymer component. The polypropylene component is present in an amount from about 50 to about 95 weight percent based on the total weight of the blend. The second polymer component is present in an amount from about 5 to about 50 weight percent based on the total weight of the blend, is a BOCD or BCD blend of at least two ssPE components, and has an overall density greater than about 0.90 g/cm3. Optionally, the plastic toughened plastics include one or more third polymer component selected from propylene-olefin elastomers and ethylene-propylene rubbers, which are present in an amount from about 1 to about 50 weight percent, based on the total weight of the blend.Type: ApplicationFiled: October 2, 2006Publication date: May 20, 2010Inventors: Patrick Brant, Bryan R. Chapman, Narayanaswami Raja Dharmarajan, Prasadarao Meka
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Patent number: 7585917Abstract: Described herein is a thermoplastic physical blend composition comprising (a) from 20 to 95 wt. % based on the total polymer content of a first polymer component that includes polypropylene having a melting point (Tm)?110° C.; and (b) from 80 to 5 wt. % based on the total polymer content of a second polymer component that includes a reactor blend obtainable from a solution process, the reactor blend including: (i) from 2 to 98 wt. % based on the total weight of the SPC of a propylene polymer having 60 wt. % or more units derived from propylene, including isotactically arranged propylene derived sequences and Tm<105° C. or a Heat of Fusion<45 J/g, or both; and (ii) from 98 to 2 wt. % based on the total weight of the SPC of an ethylene ?-olefin elastomer having either no crystallinity or crystallinity derived from ethylene, wherein (c) the FPC and the SPC are physically blended together to form the composition.Type: GrantFiled: May 30, 2006Date of Patent: September 8, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Sudhin Datta, Michael Glenn Williams, Narayanaswami Raja Dharmarajan, Vetkav Rajagopalan Eswaran, Rui Zhao
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Publication number: 20090124153Abstract: A non-woven fabric made from a composition prepared by combining a first propylene-based polymer blend, where the first polymer blend is prepared by combining a propylene-based elastomer with a propylene-based thermoplastic resin and where the first blend has an MFR (ASTM D-1238 2.16 kg @ (230° C.) equal to or less than 50 dg/min, with a second propylene-based polymer blend, where the second polymer blend is prepared by combining a propylene-based elastomer with a propylene-based thermoplastic resin and where said second blend has an MFR (ASTM D-1238 2.16 kg @ 230° C.) greater than 50 dg/min, where the propylene-based elastomers comprise from about 5% to 35% by weight units derived from ethylene or non-propylene alpha-olefin and have a heat of fusion, as determined by DSC, of less than 80 J/g, and where the propylene-based thermoplastic resins have a heat of fusion, as determined by DSC, equal to or greater than 80 J/g.Type: ApplicationFiled: November 9, 2007Publication date: May 14, 2009Inventors: Narayanaswami Raja Dharmarajan, Vincent B. Gallez, Smita Kacker, Chia Yung Cheng