Patents by Inventor Pawan K. Agarwal
Pawan K. Agarwal 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: 7101936Abstract: A method of lowering MFR response of a high-melt-flow-rate-polymer-producing metallocene catalyst is provided. The method includes contacting the metallocene catalyst with a sufficient quantity of ?,?-diene monomer such that when the catalyst composition is contacted with polymerizable reactants under suitable polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 1000. Hydrogen and ethylene may also be present in the polymerization. Additionally a catalyst composition is provided which includes a high-melt-flow-rate-polymer-producing metallocene catalyst and a sufficient quantity of ?,?-diene monomers such that when the catalyst composition is contacted with a monomer under polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 1000.Type: GrantFiled: December 18, 2001Date of Patent: September 5, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Weiqing Weng, Aspy K. Mehta, Pawan K. Agarwal, Armenag Dekmezian
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Patent number: 6956075Abstract: The present invention is a composition and a method of forming a composition, the composition comprising at least a halogenated elastomer and an amine or phosphine. An additional rubber component may be present in the composition of the invention. In one embodiment, the halogenated elastomer is a isoolefin copolymer comprising a halomethylstyrene derived unit. The amine or phosphine compound is represented by the formula (R1R2R3)Q, wherein Q is a Group 15 element, and wherein R1 is either hydrogen or a C4 to C30 hydrocarbyl group, R2 is either hydrogen or a C1 to C30 hydrocarbyl group; and R3 is either hydrogen or a C1 to C30 hydrocarbyl group provided that at least one of R1, R2 and R3 is not hydrogen.Type: GrantFiled: October 9, 2001Date of Patent: October 18, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Hsien-Chang Wang, Ilan Duvdevani, Connie R. Qian, Pawan K. Agarwal
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Patent number: 6825281Abstract: The invention provides a thermoplastic composition of C4-C7 isoolefin copolymers including halomethylstyrene derived units blended with a hindered amine or phosphine of the structure R1 R2 R3 N or R1 R2 R3 P wherein R1, R2 and R3 are preferably lower and higher alkyl groups. The resulting ionically associated, amino or phosphine modified elastomers are used to prepare thermoplastic elastomer blend compositions, including dynamically vulcanized compositions, containing more finely dispersed elastomers which results in compositions having improved mechanical properties.Type: GrantFiled: April 3, 2003Date of Patent: November 30, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Mun Fu Tse, Hsien-Chang Wang, Pawan K. Agarwal, Ramanan Krishnamoorti
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Patent number: 6780936Abstract: This invention relates to compositions derived from polyolefins combined with a polymeric nucleating agent. The nucleating agent is specifically a diene-propylene copolymer.Type: GrantFiled: February 11, 2003Date of Patent: August 24, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Pawan K. Agarwal, Armenag Dekmezian, Aspy K. Mehta, Weiqing Weng
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Publication number: 20040157999Abstract: This invention relates to compositions derived from polyolefins combined with polymeric nucleating agent. The nucleating agent is specifically a diene-propylene copolymer.Type: ApplicationFiled: February 11, 2003Publication date: August 12, 2004Inventors: Pawan K. Agarwal, Armenag Dekmezian, Aspy K. Mehta, Weiqing Weng
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Publication number: 20040097654Abstract: The present invention is a composition and a method of forming a composition, the composition comprising at least a halogenated elastomer and an amine or phosphine. An additional rubber component may be present in the composition of the invention. In one embodiment, the halogenated elastomer is a isoolefin copolymer comprising a halomethylstyrene derived unit. The amine or phosphine compound is represented by the formula (R1R2R3)Q, wherein Q is a Group 15 element, and wherein R1 is either hydrogen or a C4 to C30 hydrocarbyl group, R2 is either hydrogen or a C1 to C30 hydrocarbyl group; and R3 is either hydrogen or a C1 to C30 hydrocarbyl group provided that at least one of R1, R2 and R3 is not hydrogen.Type: ApplicationFiled: April 3, 2003Publication date: May 20, 2004Inventors: Hsien-Chang Wang, Ilan Duvdevani, Connie R Qian, Pawan K. Agarwal
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Publication number: 20040054098Abstract: A method of lowering MFR response of a high-melt-flow-rate-polymer-producing metallocene catalyst is provided. The method includes contacting the metallocene catalyst with a sufficient quantity of &agr;,&ohgr;-diene monomer such that when the catalyst composition is contacted with polymerizable reactants under suitable polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 1000. Hydrogen and ethylene may also be present in the polymerization. Additionally a catalyst composition is provided which includes a high-melt-flow-rate-polymer-producing metallocene catalyst and a sufficient quantity of &agr;,&ohgr;-diene monomers such that when the catalyst composition is contacted with a monomer under polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 1000.Type: ApplicationFiled: June 2, 2003Publication date: March 18, 2004Inventors: Weiqing Weng, Aspy K. Mehta, Pawan K. Agarwal, Armenag Dekmezian
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Publication number: 20040014856Abstract: The invention provides a thermoplastic composition of C4-C7 isoolefin copolymers including halomethylstyrene derived units blended with a hindered amine or phosphine of the structure R1 R2 R3 N or R1 R2 R3 P wherein R1, R2 and R3 are preferably lower and higher alkyl groups. The resulting ionically associated, amino or phosphine modified elastomers are used to prepare thermoplastic elastomer blend compositions, including dynamically vulcanized compositions, containing more finely dispersed elastomers which results in compositions having improved mechanical properties.Type: ApplicationFiled: April 3, 2003Publication date: January 22, 2004Inventors: Mun Fu Tse, Hsien-Chang Wang, Pawan K Agarwal, Ramanan Krishnamoorti
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Patent number: 6428901Abstract: Disclosed are compositions comprising: a) an ethylene polymer component having a melting temperature greater than or equal to about 75° C., an ethylene crystallinity level of 5 weight percent or more, and a narrow compositional distribution; and b) a propylene polymer component having a melt flow rate of 500 dg/min. or more at 230° C. and a melting temperature greater than or equal to about 125° C. Further disclosed are films and articles made thereof.Type: GrantFiled: December 20, 1999Date of Patent: August 6, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Pawan K. Agarwal, Armenag H. Dekmezian
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Patent number: 6407171Abstract: Disclosed are compositions comprising: a) an ethylene polymer component having a melting temperature greater than or equal to about 75° C., an ethylene crystallinity level of 5 weight percent or more, and a narrow compositional distribution; and b) a propylene polymer component having a melt flow rate of 500 dg/min. or more at 230° C. and a melting temperature greater than or equal to about 125° C.Type: GrantFiled: December 20, 1999Date of Patent: June 18, 2002Assignee: Exxon Chemical Patents Inc.Inventors: Pawan K. Agarwal, Armenag H. Dekmezian
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Patent number: 6306960Abstract: This invention relates generally to articles formed from polypropylene polymer foams and desirably isotactic polypropylene polymer foams. The polypropylene polymers are obtained from metallocene catalysis. The polypropylene polymer has molecular weight distributions and densities that fall within broad ranges. The polypropylene polymer foam may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages.Type: GrantFiled: November 4, 1999Date of Patent: October 23, 2001Assignee: ExxonMobil Chemical Patents Inc.Inventors: Pawan K. Agarwal, Aspy K. Mehta
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Patent number: 6174930Abstract: This invention relates generally to foamable polypropylene polymer, and more particularly a foamable isotactic polypropylene homopolymer obtained from metallocene catalysis and to their methods of production and articles formed therefrom. The foamable polypropylene polymer has molecular weight distributions and densities that fall within broad ranges. The foamable polypropylene polymer may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages.Type: GrantFiled: November 4, 1999Date of Patent: January 16, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Pawan K. Agarwal, Aspy K. Mehta
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Patent number: 5541285Abstract: This invention relates to a method to process narrow molecular weight distribution polyolefins, particularly thermoplastics, polyethylenes, polypropylenes, and polyacrylates, whether they are homopolymers or copolymers. The process may be used in any extruder and is typically implemented along the extruder screw and/or barrel by heating the first zone the screw/barrel to place the polyolefin into a molten, flowable state. Thereafter, the polymer is cooled in the second heating zone to a point 50.degree. C. above or 10.degree. C. below the crystalline melting temperature of the polymer and thereafter is reheated in the final heating zone to a molten, flowable state and finally extruding it within 5 seconds or less through the die.Type: GrantFiled: January 13, 1995Date of Patent: July 30, 1996Assignee: Exxon Chemical Patents Inc.Inventor: Pawan K. Agarwal
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Patent number: 5216048Abstract: This invention relates to emulsion-type adhesive compositions which include a copolymer of a conjugated diene and sulfopropyl-N-methacroyloxyethyl-N,N-dimethyl ammonium betaine, wherein the sulfobetaine copolymer has about 0.15 to about 15 mole % sulfobetaine groups per 100 grams of the neutralized sulfonated copolymer, and less than about 250 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, having about 5 to 6 carbon atoms, the hydrocarbon resin being composed of aliphatic dienes and mono-olefins per 100 parts by weight of the neutralized sulfonated copolymer.Type: GrantFiled: March 7, 1990Date of Patent: June 1, 1993Assignee: Exxon Research & Engineering CompanyInventors: Pawan K. Agarwal, Allen C. Werner, Donald N. Schulz, Jeffrey Kaladas
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Patent number: 5066694Abstract: This invention relates to a pressure sensitive adhesive compositions which include an emulsion of a metal neutralized sulfonated copolymer of isoprene/sodium styrene sulfonate, wherein the neutralized sulfonated copolymer has about 5 to about 250 meq. of neutralized sulfonate groups per 100 grams of the neutralized sulfonated copolymer, and less than about 50 parts by weight of an emulsion of a preferential polar plasticizer, and less than about 300 parts by weight of an emulsion of a hydrocarbon tackifying resin of a petroleum or coal tar distillate, having about 4 to 12 carbon atoms, wherein the hydrocarbon resin is composed of aliphatic dienes and monoolefins per 100 parts by weight of the neutralized sulfonated copolymer.Type: GrantFiled: September 27, 1990Date of Patent: November 19, 1991Assignee: Exxon Research and Engineering CompanyInventors: Pawan K. Agarwal, Thomas Pugel
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Patent number: 5051461Abstract: This invention relates to emulsion type adhesive compositions which include a metal neutralized copolymer of a conjugated diene and an ethoxylated alkylamine salt of a styrene sulfonate, wherein the sulfonated copolymer has about 5 to about 125 meq. so sulfonate groups per 100 grams of the sulfonated copolymer, and less than about 300 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, having about 5 to 6 carbon atoms, the hydrocarbon resin being composed of aliphatic dienes and monoolefins per 100 parts by weight of the neutralized sulfonated copolymer.Type: GrantFiled: September 27, 1990Date of Patent: September 24, 1991Assignee: Exxon Research and Engineering CompanyInventors: Pawan K. Agarwal, Warren A. Thaler
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Patent number: 5051296Abstract: This invention relates to emulsion type adhesive compositions which include a metal neutralized copolymer of a conjugated diene and an ethoxylated alkylamine salt of a styrene sulfonate, wherein the sulfonated copolymer has about 5 to about 125 meg. of sulfonate groups per 100 grams of the sulfonated copolymer, and about 25 to about 200 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, having about 5 to 6 carbon atoms, the hydrocarbon resin being composed of aliphatic dienes and monoolefins per 100 parts by weight of the neutralized sulfonated copolymer.Type: GrantFiled: September 27, 1990Date of Patent: September 24, 1991Assignee: Exxon Research and Engineering CompanyInventors: Pawan K. Agarwal, Warren A. Thaler
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Patent number: 4983652Abstract: This invention relates to hot melt adhesive compositions which includes a polymer complex of an amine containing polymer and a co- or terpolymer, about 3 to about 100 parts by weight of a polymer complex per 100 parts by weight of the highly unsaturated hydrocarbon rubber, wherein the neutralized sulfonated elastomeric polymer has about 0.2 to about 5 weight percent of chemically combined sulfur and about 25 to about 200 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, aliphatic dienes and mono and diolefins, cyclic olefins of 5 to 6 carbon atoms and hydrogenated poly cyclics per 100 parts by weight of the polymer complex.Type: GrantFiled: December 21, 1988Date of Patent: January 8, 1991Assignee: Exxon Research & Engineering CompanyInventor: Pawan K. Agarwal
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Patent number: 4761444Abstract: An elastomeric blend composition having improved tear properties and having a viscosity at 0.73 sec.sup.-1 and at 200.degree. C. of about 8.times.10.sup.3 to about 8.times.10.sup.5 poises, said composition formable into an elastomeric article, which comprises:(a) a neutralized sulfonated EPDM terpolymer having a viscosity at 0.73 sec.sup.-1 and at 200.degree. C. of about 5.times.10.sup.4 poises to about 5.times.10.sup.6 poises and about 10 to about 50 meq. sulfonate groups per 100 grams of said sulfonated EPDM terpolymer, said sulfonate groups being neutralized; and(b) about 2 to about 60 parts by weight of a fluorohydrocarbon elastomer per 100 parts of such sulfonated EPDM terpolymer.Type: GrantFiled: June 9, 1986Date of Patent: August 2, 1988Assignee: Exxon Research and Engineering CompanyInventors: Pawan K. Agarwal, William M. Petrik, Richard T. Garner
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Patent number: H818Abstract: This invention relates to extrusion and injection moldable type elastomeric compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of about 8.times.10.sup.4 to about 8.times.10.sup.6 poises. The compositions used for elastomeric articles include neutralized sulfonated co- and terpolymers of octene-1/ethylene/ENB or sulfonated terpolymers of hexene-1/ethylene/ENB, about 15 to about 200 parts by weight of a non-polar process oil per 100 parts of polymer; about 50 to about 300 parts by weight of a filler per 100 parts of polymer; and a preferential plasticizer at about 1 to about 50 parts by weight per 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at less then about 100 parts per hundred by weight.Type: GrantFiled: April 3, 1987Date of Patent: September 4, 1990Assignee: Exxon Research & Engineering Co.Inventors: Joseph Wagensommer, Pawan K. Agarwal, Ilan Duvdevani