Patents by Inventor Smita Kacker
Smita Kacker 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: 20140378017Abstract: A method for making nonwoven fabrics of fibers comprising one or more primary polypropylenes having a molecular weight distribution of less than 3.5 and a melt flow rate within the range from 5 to 500 dg/min, the fibers having an average diameter of less than 20 ?m, or a denier (g/9000 m) of less than 2.0, thus forming propylene-based fabrics. The propylene-based fabrics may have a MD Tensile Strength (WSP 110.4 (05)) of greater than 20 N/5 cm when calendered at a temperature within the range from 110 to 150° C. Also, the fabrics may have a CD Tensile Strength (WSP 110.4 (05)) of greater than 10 N/5 cm when calendered at a temperature within the range from 110 to 150° C. The fabrics are preferably meltspun, and in particular may be spunbond fabrics.Type: ApplicationFiled: September 9, 2014Publication date: December 25, 2014Inventors: William M. Ferry, Smita Kacker, Olivier J. Georjon
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Patent number: 8728960Abstract: The invention described relates to a polyolefin blend composition suitable for spunbond fiber or filament compositions, and to fabric compositions and composite constructions therefrom, said blend comprising a) from 60-98 wt % of at least one random propylene copolymer having a comonomer content of from 8 to 25 wt % and a crystalline melting point (Tm) as determined by differential scanning calorimetry (DSC) of from about 40° C. to about 110° C.; and b) from 2-40 wt % of at least one substantially isotactic polypropylene homopolymer or copolymer comprising one or more C2 and/or C4-C8 comonomer, having a crystalline melting point (Tm) as determined by DSC greater than or equal to 120° C. The blends of the present invention typically have a melt flow rate (MFR) of from 100 g/10 min to about 500 g/10 min.Type: GrantFiled: January 19, 2007Date of Patent: May 20, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Smita Kacker, Chia Yung Cheng
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Patent number: 8664336Abstract: A method for forming a fiber, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110° C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110° C. and a heat of fusion in excess of 80 J/g, and introducing the reactive blend to a spinneret to form a fiber or extruding the reacted blend through a plurality of die capillaries to form molten threads or filaments which are attenuated in a gas stream to form meltblown fibers.Type: GrantFiled: October 22, 2012Date of Patent: March 4, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Vetkav R. Eswaran, Bruce A. Harrington, Robert F. Bahm, Smita Kacker, Paul E. Rollin, Jr.
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Patent number: 8461072Abstract: This invention relates to a series of novel late transition metal catalysts for olefin oligomerization, the catalysts demonstrating high activity and selectivity for linear ?-olefins. The catalysts contain a Group-8, -9, or -10 transition metal, M, excluding palladium; an ancillary ligand comprising: a terminal amine comprising two independently selected hydrocarbyl radicals, R1 and R2; a terminal phosphine comprising two independently selected hydrocarbyl radicals, R3 and R4; and a hydrocarbyl bridge, Y, comprising a backbone wherein the hydrocarbyl bridge connects between the terminal amine and the terminal phosphine and wherein the backbone comprises a chain that is four or more carbon atoms long; and an abstractable ligand, X. For example this invention relates to a composition of matter with the following formula: wherein M, R1, R2, R3, and R4, Y, and X are as defined above.Type: GrantFiled: October 24, 2003Date of Patent: June 11, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Patent number: 8293842Abstract: A method for forming a polymer blend, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110° C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110° C. and a heat of fusion in excess of 80 J/g.Type: GrantFiled: December 10, 2009Date of Patent: October 23, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Vetkav R. Eswaran, Bruce A. Harrington, Robert F. Bahm, Smita Kacker
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Publication number: 20120116338Abstract: Nonwoven fabrics of fibers comprising one or more primary polypropylenes having a molecular weight distribution of less than 3.5 and a melt flow rate within the range from 5 to 500 dg/min, the fibers having an average diameter of less than 20 ?m, or a denier (g/9000 m) of less than 2.0, thus forming propylene-based fabrics. The primary polypropylene is preferably a reactor grade polymer made using a single-site catalyst. In certain embodiments, the propylene-based fabrics disclosed herein have a MD Tensile Strength (WSP 110.4 (05)) of greater than 20 N/5 cm when calendered at a temperature within the range from 110 to 15O° C. Also in certain embodiments, the fabrics have a CD Tensile Strength (WSP 110.4 (05)) of greater than 10 N/5 cm when calendered at a temperature within the range from 110 to 15O° C. The fabrics are preferably meltspun, and in a particular embodiment are spunbond fabrics.Type: ApplicationFiled: December 21, 2009Publication date: May 10, 2012Inventors: William M. Ferry, Smita Kacker, Olivier J. Georjon
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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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Publication number: 20110306717Abstract: A method for forming a polymer blend, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110° C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110° C. and a heat of fusion in excess of 80 J/g.Type: ApplicationFiled: December 10, 2009Publication date: December 15, 2011Inventors: Vetkav R. Eswaran, Bruce A. Harrington, Robert Bahm, Smita Kacker
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Publication number: 20110207637Abstract: This invention relates to an ethylene copolymer for lubricating oil, comprising: ethylene; at least one alpha-olefin having 3 or more carbon atoms; and at least one vicinally substituted olefin having 2 to 40 carbon atoms, wherein: the copolymer has a weight-average molecular weight (Mw) of about 50,000 to about 500,000; and an intensity ratio of S?? to S?? insertions, as determined by a 13C-NMR spectrum of less than 0.5.Type: ApplicationFiled: December 29, 2010Publication date: August 25, 2011Inventors: Sudhin Datta, Smita Kacker, Mun F. Tse, Thomas T. Sun, Eric B. Sirota, Vera Minak-Bernero, Liehpao O. Farng
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Patent number: 7994086Abstract: A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins.Type: GrantFiled: November 29, 2010Date of Patent: August 9, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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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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Publication number: 20110092658Abstract: A series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalysts demonstrate high activity and selectivity for linear ?-olefins.Type: ApplicationFiled: November 29, 2010Publication date: April 21, 2011Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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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: 7871953Abstract: As series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalyst system includes a Group 8, 9 or 10 transition metal and an activator. The catalysts demonstrate high activity and selectivity for linear ?-olefins. Preferably this invention relates to a catalyst system comprising the reaction product of: (a) an activator selected from the group consisting of alumoxane, aluminum alkyl, alkyl aluminum halide, alkylaluminum alkoxide, discrete ionic activator, and Lewis acid; and (b) a catalyst precursor wherein the catalyst precursor has the following formula: wherein (i) M is a Group-8, -9 , or -10 transition metal; (ii) N is nitrogen (iii) P is phosphorus; (iv) R1, R2, R3, and R4 are independently hydrocarbyl radicals; (v) Y is a hydrocarbyl bridge comprising a backbone wherein the backbone comprises a chain that is four or more carbon atoms long; (vi) X are independently abstractable ligands.Type: GrantFiled: October 24, 2003Date of Patent: January 18, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Baiyi Zhao, Smita Kacker, Jo Ann Marie Canich
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Patent number: 7863206Abstract: Nonwoven fabrics and methods for making the same are described, wherein the fabrics comprise two or more propylene-based elastomers in combination with one or more propylene-based thermoplastic polymers. Specifically, the first propylene-based elastomer comprises at least 7% by weight ethylene or non-propylene alpha-olefin units, the second propylene-based elastomer comprises less than 7% by weight ethylene or non-propylene alpha-olefin units, the first and second propylene-based elastomers each have a heat of fusion less than 80 J/g, and the propylene-based thermoplastic polymer has a heat of fusion greater than 80 J/g.Type: GrantFiled: November 9, 2007Date of Patent: January 4, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Bruce A. Harrington, Smita Kacker, Vetkav Rajagopalan Eswaran
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Patent number: 7601666Abstract: A compound represented by the formula: where: M is a transition metal selected from group 4 of the periodic table; each R1 is independently selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl and functional group, and any two R1 groups may be linked, provided that if the two R1 groups are linked, then they do not form a butadiene group when M is Zr; R3 is carbon or silicon; R4 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; R5 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, R4 and R5 may be bound together to form a ring; R6 is carbon or silicon; each R7 is hydrogen; each R8 is independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, pentyl, hexyl and the isomers thereof; R10 is -M2(R16)h— where M2 is B, Al, N, P, Si or Ge, h is 1 or 2; each R9, R11, R13 and R14 and R16 is hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group, and two R16 groups may be linked together to fType: GrantFiled: July 8, 2005Date of Patent: October 13, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Francis C. Rix, Smita Kacker, Sudhin Datta, Rul Zhao, Vetkav R. Eswaran
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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
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Publication number: 20090124154Abstract: Nonwoven fabrics and methods for making the same are described, wherein the fabrics comprise two or more propylene-based elastomers in combination with one or more propylene-based thermoplastic polymers. Specifically, the first propylene-based elastomer comprises at least 7% by weight ethylene or non-propylene alpha-olefin units, the second propylene-based elastomer comprises less than 7% by weight ethylene or non-propylene alpha-olefin units, the first and second propylene-based elastomers each have a heat of fusion less than 80 J/g, and the propylene-based thermoplastic polymer has a heat of fusion greater than 80 J/g.Type: ApplicationFiled: November 9, 2007Publication date: May 14, 2009Inventors: Bruce A. Harrington, Smita Kacker, Vetkav Rajagopalan Eswaran
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Patent number: 7498287Abstract: A composition having the formula I where R1 and R2 are independently hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, C1 to C12 alkoxy, F, Cl, SO3, C1 to C12 perfluoroalkyl, and N(CH3)2, R3 is independently selected from the group consisting of hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, and 2,2,2-trifluoroethyl, A is —C(R4)—, —(CH2)x—, —(CH2)xNH(CH2)x—, or —CY2CY2—, where R4 is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen, and X is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate. When combined with an activating co-catalyst is useful polymerizing olefinic monomers.Type: GrantFiled: September 25, 2007Date of Patent: March 3, 2009Assignee: ExxonMobil Research and Engineering CompanyInventors: Smita Kacker, Enock Berluche, Robert T. Stibrany, Joseph A. Sissano, Lisa S. Baugh
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Patent number: 7498390Abstract: A composition having the formula I where R1 and R2 are independently hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, C1 to C12 alkoxy, F, Cl, SO3, C1 to C12 perfluoroalkyl, and N(CH3)2, R3 is independently selected from the group consisting of hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, and 2,2,2-trifluoroethyl, A is —C(R4)—, —(CH2)x—, —(CH2)xNH(CH2)x—, or —CY2CY2—, ps where R4 is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen, and X is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate. When combined with an activating co-catalyst is useful in polymerizing olefinic monomers.Type: GrantFiled: September 25, 2007Date of Patent: March 3, 2009Assignee: ExxonMobil Research and Engineering CompanyInventors: Smita Kacker, Enock Berluche, Robert T. Stibrany, Joseph A. Sissano, Lisa S. Baugh