Patents Represented by Attorney Nancy T. Krawczyk
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Patent number: 8252735Abstract: A basestock that comprises a fully hydrogenated substituted styrene linear dimer; a partially hydrogenated mono-aromatic substituted styrene linear dimer; and a partially hydrogenated di-aromatic substituted styrene linear dimer. A process of producing a basestock that comprises reacting a feed stream that comprises substituted styrene, alcohol, and a dimerization catalyst, in the presence of a solvent, to form a crude slurry of dimerized substituted styrene; and partially hydrogenating the dimerized substituted styrene with hydrogen over a Group VIII catalyst to form a basestock that comprises a fully hydrogenated substituted styrene linear dimer and a partially hydrogenated substituted styrene linear dimer.Type: GrantFiled: October 28, 2009Date of Patent: August 28, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Mark Paul Hagemeister, Thomas R. Forbus, Jr.
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Patent number: 8242236Abstract: An elastomeric nanocomposite is produced from an isobutylene-based polymer and a layered nanofiller. The process of preparing the nanocomposite includes the steps of a) polymerizing isobutylene monomers and multiolefin monomers to produce an isobutylene-based polymer; b) completing at least one mass transfer dependent stage in the process wherein, after completion of the stage and prior to any recovery of the polymer, the polymer is dissolved in a solvent to create a polymer cement; c) contacting the layered nanofiller and the polymer solvent to obtain the nanocomposite; and d) recovering the nanocomposite. The layered nanofiller may be in a slurry prior to contacting with the polymer cement.Type: GrantFiled: May 26, 2010Date of Patent: August 14, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: John P. Soisson, Yuan-Ju (Ray) Chen, Weiqing Weng, Michael Brendan Rodgers, Robert N. Webb
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Patent number: 8178465Abstract: The disclosure provides for a process and polymerization system to produce isoolefin polymers (72) utilizing polymorphogenates (16, 26) in the catalyst system to control polydispersity (MWD). The disclosure also provides a catalyst system (20) comprising a plurality of active catalyst complex species (34) formed by combination of a Lewis acid (24), an initiator (22) and a polymorphogenate (26), as well as polymers made using the catalyst system or process. The polymorphogenate (16, 26) can promote or mimic the formation of different active catalyst complex species (34) having different polymerization rates, i.e. different rates of propagation, chain transfer, or termination, as observed by different polydispersities resulting from the presence of relatively different proportions of the polymorphogenate.Type: GrantFiled: January 12, 2011Date of Patent: May 15, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy D. Shaffer, Michael F. McDonald, David Y. Chung, Robert N. Webb, Deborah J. Davis, Pamela J. Wright
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Patent number: 8158721Abstract: This invention relates to processes for the preparation of a dynamically vulcanized alloy comprising at least one isobutylene-containing elastomer and at least one thermoplastic resin. More specifically, the processes produce dynamically vulcanized alloys with unique morphological features which have good impermeability and low temperature flexibility.Type: GrantFiled: June 13, 2008Date of Patent: April 17, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: William G. Stevenson, Joseph M. DeLucia, Michael K. Lyon, Jianya Cheng
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Patent number: 8153719Abstract: The invention relates to rubber nanocomposites particularly suitable for innerliners and other tire applications. The uncured nanocomposite comprises an elastomer, tackifier and nanoclay.Type: GrantFiled: June 14, 2011Date of Patent: April 10, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventor: Mun Fu Tse
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Patent number: 8148450Abstract: Provided for herein is a process to produce an essentially homogeneous single liquid phase hydrocarbon-rubber cement from a polymer slurry comprising a hydrocarbon-rubber, a diluent, and unreacted monomer(s), the process comprising: (a) contacting the polymer slurry with a hydrocarbon solvent; and (b) removing the diluent in amounts not sufficiently more than is necessary to produce the essentially homogeneous single liquid phase hydrocarbon-rubber cement wherein the mass fraction of monomer(s) in the hydrocarbon-rubber cement, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber cement, is less than the mass fraction of monomer(s) in the hydrocarbon-rubber slurry, based on the total amount of hydrocarbon-rubber present in the hydrocarbon-rubber slurry, wherein the diluent comprises a hydrofluorocarbon.Type: GrantFiled: June 23, 2006Date of Patent: April 3, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael F. McDonald, Scott T. Milner, Timothy D. Shaffer, Robert N. Webb, Richard D. Hembree
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Patent number: 8071514Abstract: A highly branched functionalized silicone backbone lubricating fluid which provides exceptionally low traction, a method of lowering traction coefficients in lubricating compositions, and to uses of such compositions.Type: GrantFiled: March 7, 2008Date of Patent: December 6, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Wenning Wang Han, Martin N. Webster, Bernie J. Pafford
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Patent number: 8071835Abstract: The invention is directed to a process for producing polyolefins by one or more homogeneous or colloidal polymerization catalyst wherein residual catalyst is removed by using a solid sorbent.Type: GrantFiled: April 26, 2007Date of Patent: December 6, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Norman Yang, Mark Paul Hagemeister, Shakeel Tirmizi
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Patent number: 7989670Abstract: This invention relates to processes to produce liquid poly-alpha-olefins (PAOs) having a kinematic viscosity at 100° C. of more than 20 cSt in the presence of a metallocene catalyst with a non-coordinating anion activator and hydrogen.Type: GrantFiled: January 22, 2007Date of Patent: August 2, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Margaret May-Som Wu, Catalina L. Coker, John F. Walzer, Jr., Peijun Jiang, Steven P. Rucker
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Patent number: 7985793Abstract: The invention relates to rubber nanocomposites particularly suitable for innerliners and other tire applications. The uncured nanocomposite comprises an elastomer, tackifier and nanoclay.Type: GrantFiled: June 29, 2007Date of Patent: July 26, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventor: Mun Fu Tse
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Patent number: 7981991Abstract: Methods for producing elastomers or elastomeric compositions are provided. One or more C4 to C7 isoolefins and one or more comonomers can be polymerized in the presence of a diluent comprising one or more hydrofluorocarbons to provide a slurry comprising polymer product, unreacted monomer and the diluent. The slurry can be extruded to separate at least a portion of the diluent from the polymer product. The separated diluent can be recycled for polymerizing the one or more C4 to C7 isoolefins.Type: GrantFiled: April 20, 2007Date of Patent: July 19, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael F. McDonald, Scott T. Milner, Timothy D. Shaffer, Robert N. Webb
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Patent number: 7923491Abstract: Elastomeric compositions comprising graphite nanoparticles (preferably graphene nanoparticles) and methods for making same. Such compositions are useful for tire innertubes and tire innerliners.Type: GrantFiled: August 8, 2008Date of Patent: April 12, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Weiqing Weng, David Lohse, Miguel O. Mota, Adriana S. Silva, Edward N. Kresge
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Patent number: 7893176Abstract: The disclosure provides for a process and polymerization system to produce isoolefin polymers (72) utilizing polymorphogenates (16, 26) in the catalyst system to control polydispersity (MWD). The disclosure also provides a catalyst system (20) comprising a plurality of active catalyst complex species (34) formed by combination of a Lewis acid (24), an initiator (22) and a polymorphogenate (26), as well as polymers made using the catalyst system or process. The polymorphogenate (16, 26) can promote or mimic the formation of different active catalyst complex species (34) having different polymerization rates, i.e. different rates of propagation, chain transfer, or termination, as observed by different polydispersities resulting from the presence of relatively different proportions of the polymorphogenate.Type: GrantFiled: March 23, 2007Date of Patent: February 22, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy D. Shaffer, Michael F. McDonald, David Y. Chung, Robert N. Webb, Deborah J. Davis, Pamela J. Wright
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Patent number: 7858735Abstract: In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i.e., dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb.Type: GrantFiled: May 29, 2009Date of Patent: December 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Richard C. Yeh, Yu Feng Wang, Jean-Paul Swoboda, Oscar K. Broussard, III
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Patent number: 7838471Abstract: The invention relates to compositions comprising a blend of Group II basestocks and low volatility, low viscosity PAO basestocks. The blend is particularly useful for preparing finished lubricants that meet or even exceed the criteria for SAE Grade 0W multi-grade engine oils. The combination of these low volatility, low viscosity PAOs with Group II basestocks provide, in embodiments, the necessary performance criteria in automatic transmission fluids, automotive or industrial gear oils, hydraulic fluids, or any other high performance lubricant requiring a combination of excellent low fluidity and low volatility.Type: GrantFiled: August 7, 2006Date of Patent: November 23, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Fahimeh Pedram Shirazi, William Grant Britton
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Patent number: 7825181Abstract: The present invention relates to modified layered fillers made from layered fillers and modifying agents and processes to produce the same. The invention also relates to nanocomposite compositions made from these modified layered fillers and elastomers, and processes to produce the same, and their use in articles.Type: GrantFiled: October 7, 2005Date of Patent: November 2, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Caiguo Gong, Weiqing Weng, Mun Fu Tse, Anthony J. Dias, James P. Stokes, Alan A. Galuska, Beverly J. Poole, Carmen Neagu, Kriss R. Karp, Molly W. Johnston
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Patent number: 7781547Abstract: The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.Type: GrantFiled: June 25, 2004Date of Patent: August 24, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Yuan-Ju (Ray) Chen, Michael Francis McDonald, Timothy Daniel Shaffer, David Yen-Lung Chung, Robert Norman Webb
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Patent number: 7770621Abstract: According to the invention, a processing aid is used to improve processing in a green (uncured) rubber composition, such as in downstream in-plant processing of an innerliner compound, and maintaining, or more preferably, reducing the air permeability of the cured composition, e.g., innerliner compound. In embodiments, another of the advantages of the present invention is that the processing aid according to the invention can be used in very low levels relative to the other processing aids and oils.Type: GrantFiled: August 21, 2007Date of Patent: August 10, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Donald S. Tracey, Dirk F. Rouckhout, Walter H. Waddell
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Patent number: 7767743Abstract: A branched isobutylene-styrenic elastomer with a broad molecular weight distribution is disclosed comprising an interpolymer of an isoolefin monomer as isobutylene, a styrenic monomer such as p-methylstyrene, and a multiolefin such as divinylbenzene. The elastomer has improved green strength, relaxation characteristics, and processability in melt processing, while retaining excellent aging characteristics and barrier properties, and can be used in a blend with a linear isobutylene-p-alkylstyrene elastomer to improve processability of the linear elastomer. Also disclosed are a method for processing the linear elastomer with an effective amount of the branched elastomer to improve processability, and nanocomposites, curable compositions, cured compositions and useful articles formed from the branched elastomer and the linear-branched elastomer blends.Type: GrantFiled: March 10, 2006Date of Patent: August 3, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Weiqing Weng, David Y. Chung, Anthony Jay Dias, Yuan-Ju (Ray) Chen, Alan A. Galuska, James R. Ayers
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Patent number: 7732389Abstract: The invention relates to lubricating fluids and oil formulations which provide exceptionally low traction, a method of lowering traction coefficients in lubricating compositions, and to uses of such compositions.Type: GrantFiled: January 24, 2006Date of Patent: June 8, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: William T. Sullivan, Halou Oumar-Mahamat, Martin N. Webster, Ellen B. Brandes