Patents by Inventor David Rauscher
David Rauscher 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: 20120010376Abstract: Propylene polymerization processes, polymers and films formed therefrom are described herein. The propylene polymerization processes generally include contacting propylene and an amount of ethylene with a first metallocene catalyst and a second metallocene catalyst within a polymerization reaction vessel to form a propylene based polymer, wherein the amount is an amount effective to form the propylene based polymer including from about 2 wt. % to about 6 wt. % ethylene, the second metallocene catalyst is capable of incorporating a greater amount of ethylene into the propylene based polymer than the first metallocene catalyst and wherein the first metallocene catalyst is capable of forming a propylene/ethylene random copolymer exhibiting a melting temperature that is greater than that of a propylene/ethylene random copolymer formed from the second metallocene catalyst.Type: ApplicationFiled: July 8, 2010Publication date: January 12, 2012Applicant: Fina Technology, Inc.Inventors: Tim Coffy, Kenneth Blackmon, Joseph Thorman, David Rauscher, Jun Tian, William Gauthier, Nathan Williams
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Publication number: 20110207898Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.Type: ApplicationFiled: May 3, 2011Publication date: August 25, 2011Applicant: FINA TECHNOLOGY, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Publication number: 20110195210Abstract: Injection stretch blow molded (ISBM) articles containing a bio-based polymers and methods of forming the same are described herein. The method generally includes providing a propylene-based polymer; contacting the propylene-based polymer with polylactic acid to form a polymeric blend; injection molding the blend into a preform; and stretch-blowing the preform into an article.Type: ApplicationFiled: February 8, 2011Publication date: August 11, 2011Applicant: Fina Technology, Inc.Inventors: FENGKUI LI, Luyi Sun, John Ashbaugh, David Rauscher, Leland Daniels, Robert Dotter
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Patent number: 7960484Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.Type: GrantFiled: January 23, 2008Date of Patent: June 14, 2011Assignee: Fina Technology, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Publication number: 20110112262Abstract: Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m2/g. An alkylalumoxane cocatalyst component is incorporated on the support. The isospecific metallocene is characterized by the formula: B(CpRaRb)(FlR?2)MQn??(1) or by the formula: B?(Cp?R?aR?b)(Fl?)M?Q?n???(2) In the formulas Cp and Cp? are substituted cyclopentadienyl groups, Fl and Fl? are fluorenyl groups, and B and B? are structural bridges. R?are substituents at the 2 and 7 positions, Ra and R?a are substituents distal to the bridge, and Rb and R?b are proximal to the bridge. M and M? are transition metals, Q? is a halogen or a C1-C4 alkyl group; and n? is an integer of from 0-4.Type: ApplicationFiled: September 15, 2010Publication date: May 12, 2011Applicant: Fina Technology, Inc.Inventors: William Gauthier, David Rauscher, Jun Tian, Nathan Williams
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Publication number: 20100267909Abstract: Disclosed is a bimodal Ziegler-Natta catalyzed polyethylene, having a density of from 0.930 g/cc to 0.960 g/cc, and a molecular weight distribution of from 10 to 25, wherein an article formed therefrom has a PENT of at least 1500. Also disclosed is a method of preparing a tubular article including obtaining a bimodal polyethylene having a density of from 0.930 g/cc to 0.960 g/cc and a molecular weight distribution of from 10 to 25, and processing the polyethylene under conditions where a specific energy input (SEI) is less than 300 kW·h/ton, and wherein the article has a PENT of at least 1500. Further disclosed is a method for controlling the degradation of polyethylene including polymerizing ethylene monomer, recovering polyethylene, extruding the polyethylene, and controlling the degradation of polyethylene by measuring the SEI to the extruder and adjusting throughput and/or gear suction pressure keep SEI less than 300 kW·h/ton, and forming an article.Type: ApplicationFiled: May 11, 2010Publication date: October 21, 2010Applicant: Fina Technology, Inc.Inventors: Tim Coffy, Steven Gray, David Knoeppel, Cyril Chevillard, David Rauscher, Carlos Corleto, Gerhard Guenther, Brian B. Cole, Stan Biesert, Vincent Barre, Ruby L. Curtis, Son Nguyen, Danielle Childress
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Publication number: 20100159173Abstract: Polymer articles and processes of forming the same are described herein. The processes generally include providing a bimodal ethylene based polymer, blending the bimodal ethylene based polymer with a nucleator to form modified polyethylene and forming the modified polyethylene into a polymer article, wherein the polymer article is selected from pipe articles and blown films.Type: ApplicationFiled: April 7, 2009Publication date: June 24, 2010Applicant: Fina Technology, Inc.Inventors: John Ashbaugh, Brian B. Cole, David Rauscher, Gerhard Guenther, Michael McLeod, Ruby L. Curtis
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Patent number: 7473664Abstract: Methods of forming polyolefins and catalysts are described herein. Such methods generally include forming Ziegler-Natta catalyst compounds in the absence of one or more blended compounds typically used to form such catalyst.Type: GrantFiled: June 23, 2006Date of Patent: January 6, 2009Assignee: Fina Technology, Inc.Inventors: Kayo Vizzini, David Knoeppel, Steven Gray, David Rauscher, Tim Coffy, Henry Enriquez
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Publication number: 20080287619Abstract: Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m 2/g. An alkylalumoxane cocatalyst component is incorporated on the support. The isospecific metallocene is characterized by the formula: B(CpRaRb)(FlR?2)MQn ??(1) or by the formula: B?(Cp?R?aR?b)(Fl?)M?Q?n? ??(2) In the formulas Cp and Cp? are substituted cyclopentadienyl groups, Fl and Fl? are fluorenyl groups, and B and B? are structural bridges. R? are substituents at the 2 and 7 positions, Ra and R?a are substituents distal to the bridge, and Rb and R?b are proximal to the bridge. M and M? are transition metals, Q? is a halogen or a C1-C4 alkyl group; and n? is an integer of from 0-4.Type: ApplicationFiled: May 18, 2007Publication date: November 20, 2008Inventors: William Gauthier, David Rauscher, Jun Tian, Nathan Williams
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Publication number: 20080194399Abstract: The invention is directed to a metallocene catalyst system comprising an inert silica support having pores with a peak pore volume of greater than about 0.115 mL/g at a pore diameter between about 250 Angstroms and about 350 Angstroms, and an alumoxane activator, with the metallocene being bound substantially throughout the support. The activator is grafted to the support in a solvent at a reflux temperature of toluene to obtain an aluminoxane on silica, and a metallocene component is added to make a MCS having a metallocene loading of about 2 wt %. This facilitates the production of metallocene catalyst systems having increased catalytic activity than previously recognized that is at least about 20 percent higher than the catalytic activity for a metallocene loading of about 1 wt % where the activator is grafted to the support at room temperature.Type: ApplicationFiled: January 14, 2008Publication date: August 14, 2008Applicant: FINA TECHNOLOGY, INC.Inventors: Jun Tian, William Gauthier, David Rauscher, Shady Henry
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Patent number: 7390860Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.Type: GrantFiled: December 10, 2004Date of Patent: June 24, 2008Assignee: Fina Technology, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Publication number: 20080114135Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.Type: ApplicationFiled: January 23, 2008Publication date: May 15, 2008Applicant: FINA TECHNOLOGY, INC.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hotmann, Michel Daumerie
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Publication number: 20080051538Abstract: Disclosed is a bimodal Ziegler-Natta catalyzed polyethylene, having a density of from 0.930 g/cc to 0.960 g/cc, and a molecular weight distribution of from 10 to 25, wherein an article formed therefrom has a PENT of at least 1500. Also disclosed is a method of preparing a tubular article including obtaining a bimodal polyethylene having a density of from 0.930 g/cc to 0.960 g/cc and a molecular weight distribution of from 10 to 25, and processing the polyethylene under conditions where a specific energy input (SEI) is less than 300 kW.h/ton, and wherein the article has a PENT of at least 1500. Further disclosed is a method for controlling the degradation of polyethylene including polymerizing ethylene monomer, recovering polyethylene, extruding the polyethylene, and controlling the degradation of polyethylene by measuring the SEI to the extruder and adjusting throughput and/or gear suction pressure keep SEI less than 300 kW.h/ton, and forming an article.Type: ApplicationFiled: July 6, 2007Publication date: February 28, 2008Applicant: FINA TECHNOLOGY, INC.Inventors: TIM COFFY, Steven Gray, David Knoeppel, Cyril Chevillard, David Rauscher, Carlos Corleto, Gerhard Guenther, Brian Cole, Stan Beisert, Vincent Barre, Ruby Curtis, Son Nguyen, Danielle Childress
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Publication number: 20070299224Abstract: Methods of forming polyolefins and catalysts are described herein. Such methods generally include forming Ziegler-Natta catalyst compounds in the absence of one or more blended compounds typically used to form such catalyst.Type: ApplicationFiled: June 23, 2006Publication date: December 27, 2007Applicant: Fina Technology, Inc.Inventors: Kayo Vizzini, David Knoeppel, Steven Gray, David Rauscher, Tim Coffy, Henry Enriquez
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Publication number: 20070129238Abstract: It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide for controlled chain defects/defect distribution and thus a regulated microtacticity. Consequently, the curve of storage modulus (G?) v. temperature is shifted such that the film achieves the same storage modulus at a lower temperature enabling faster throughput of polypropylene film through a high-speed tenter.Type: ApplicationFiled: January 31, 2007Publication date: June 7, 2007Inventors: Kenneth Blackmon, David Rauscher, Michael Wallace
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Publication number: 20060247395Abstract: A process for preparing low melting copolymers comprising contacting a mixture of olefin monomers with a CpFlu-type metallocene catalyst under reaction conditions sufficient to form a copolymer. The copolymers thus prepared desirably display melt temperatures from about 100° C. to about 140° C. and may be produced with reduced amounts of ethylene. The copolymers may also exhibit reduced levels of undesirable xylene solubles, relatively narrow molecular weight distribution, and other improved optical and physical properties.Type: ApplicationFiled: April 29, 2005Publication date: November 2, 2006Applicant: Fina Technology, Inc.Inventors: William Gauthier, Jun Tian, David Rauscher, Constance Patrick, Shady Henry, Nathan Williams
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Publication number: 20060247396Abstract: Disclosed is a method of polymerizing olefin using a compatible combination of a multi-site catalyst and a single-site catalyst. The catalysts may be a Ziegler-Natta catalyst and a metallocene catalyst. The resulting polymer, which may be a homopolymer or a random copolymer, may exhibit a molecular weight distribution which is intermediate than that resulting for polymers prepared using either catalyst alone.Type: ApplicationFiled: April 29, 2005Publication date: November 2, 2006Applicant: Fina Technology, Inc.Inventors: Kenneth Blackmon, Joseph Thorman, David Rauscher, Edwar Shamshoum, Christopher Bauch
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Publication number: 20060154809Abstract: Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to produce syndiotactic polypropylene or isotactic polypropylene. The supported catalyst comprises a stereospecific metallocene catalyst component and a co-catalyst component comprising an alkylalumoxane. Both the metallocene catalyst component and the co-catalyst component are supported on a particulate polyorganosilsesquioxane support comprising spheroidal particles of a polyorganosilsesquioxane having an average. diameter with the range of 0.3-20 microns. The polyorganosilsesquioxane support is characterized by relatively low surface area, specifically a surface area less than 100 square meters per gram. The metallocene component can take the form of a single metallocene or two or more metallocenes which are co-supported on the polyorganosilsesquioxane support.Type: ApplicationFiled: January 27, 2004Publication date: July 13, 2006Inventors: David Rauscher, William Gauthier
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Patent number: 7056991Abstract: The present invention relates to propylene polymerization process in a bulk loop reactor, and particularly to propylene polymerization process for polymerizing commercial quantities of polypropylene in a bulk loop reactor by sequentially introducing Ziegler-Natta and metallocene catalyst systems into the bulk loop reactor.Type: GrantFiled: December 10, 2004Date of Patent: June 6, 2006Assignee: Fina Technology, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Patent number: 7053163Abstract: The tendency of copolymer fluff grains of propylene and ethylene to agglomerate is reduced by injecting at least one olefin comonomer, such as ethylene monomer, into more than one point along the length of the reactor, rather than injecting all of the ethylene at one point. This process reduces the tendency of copolymer fluff grains to agglomerate and cause processing problems as compared with injecting the comonomer at only one point. Copolymer made by this process is expected to have lower substantially amorphous polypropylene content and better organoleptics than copolymer made where the ethylene is injected at only one point. In one non-limiting embodiment the copolymerization reactor is a loop-type reactor.Type: GrantFiled: February 22, 2005Date of Patent: May 30, 2006Assignee: Fina Technology, Inc.Inventors: Jun Tian, David Rauscher, William Gauthier, Mark C. Douglass, Nelson Black, Ronald Tharappel