Patents by Inventor Jan W. Van Egmond
Jan W. Van Egmond 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: 20160251462Abstract: A composition is provided which comprises a propylene ethylene random copolymer having a melt flow rate (MFR) (as determined according to ASTM D1238, 230° C., 2.16 Kg) of less than 1 g/10 min, a xylene solubles content of less than 7% by weight, an ethylene content of from 3 to 5 percent by weight of the copolymer, and a value equal to or greater than 92 for the product of the Koenig B value times the % mm triads measured on the xylene insoluble fraction of the random copolymer obtained by the wet method. Pipes made from the composition demonstrate improved pressure endurance.Type: ApplicationFiled: October 28, 2014Publication date: September 1, 2016Applicant: W. R. Grace & Co.-Conn.Inventors: Chai-Jing Chou, Daniel W. Baugh, III, John Kaarto, Jan W. Van Egmond, Jeffrey D. Goad, William G. Sheard
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Publication number: 20160229933Abstract: The present disclosure is directed to a process for producing olefin-based polymer in a gas phase polymerization reactor. The process includes forming a wet zone in the gas phase polymerization reactor. The wet zone is formed by maintaining a temperature less than or equal to the fluidizing medium dew point temperature+2° C. in a region of the reactor. The region is defined as the region extending from the distributor plate to 2.5 meters above the distributor plate. Injection of a high activity catalyst composition in the wet zone produces olefin-based having a settled bulk density greater than 23.5 lb/ft3.Type: ApplicationFiled: September 11, 2014Publication date: August 11, 2016Applicant: W. R. Grace & Co.-Conn.Inventors: Jan W. Van Egmond, Daniel J. Chismar, Jeffrey D. Goad
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Patent number: 8604118Abstract: A process for producing a heterophasic copolymer is provided. The process includes introducing an antifoulant to a second polymerization reactor which operates in series with a first polymerization reactor. The antifoulant may be a multicomponent antifoulant and/or a coating agent. Provision of either antifoulant enables the production of a heterophasic copolymer with an Fc value from about 10% to about 50% by inhibiting reactor fouling during polymerization.Type: GrantFiled: December 21, 2009Date of Patent: December 10, 2013Assignee: Dow Global Technologies LLCInventors: Jan W. Van Egmond, Roger B. Painter, Zuzanna Kulik, Joel D. Wieliczko
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Publication number: 20130005923Abstract: The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m3, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.Type: ApplicationFiled: June 30, 2011Publication date: January 3, 2013Applicant: Dow Global Technologies LLCInventors: Ping Cai, Jan W. Van Egmond, Matthew J. Fedec, Jeffrey D. Goad, Robert C. Brady, III, Linfeng Chen
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Patent number: 8324327Abstract: A process for polymerizing one or more olefins in a gas-phase polymerization reactor is provided. The gas-phase reactor has a fluidized bed and a fluidizing medium. The fluidizing medium has an operating density and an operating velocity. The process includes determining a critical gas velocity and/or determining a critical gas velocity for the polymerization. The operating gas density and/or the operating gas velocity for the fluidizing medium is then adjusted to be less than or equal to its respective critical value. The process includes increasing the bulk density of the fluidized bed. The increase in the fluidized bed bulk density increases productivity without increasing reactor residence time.Type: GrantFiled: August 21, 2008Date of Patent: December 4, 2012Assignee: Dow Global Technologies LLCInventors: Ping Cai, Roger B. Painter, Jan W. Van Egmond
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Patent number: 8178633Abstract: The present invention relates to an improvement for gas phase olefin polymerization process under two or more different flow regimes. The process involves adding a mixed electron donor system to a reactor having two or more different flow regimes, wherein the mixed electron donor system comprises at least one selectivity control agent and at least one activity limiting agent. The invention is particularly well suited for reactor systems which include a regime characterized by having a low-velocity or high-solid holdup, which have been reported to have operational problems such as particle agglomeration and formation of polymer “chunks”.Type: GrantFiled: December 16, 2010Date of Patent: May 15, 2012Assignee: Dow Global Technologies LLCInventors: Ping Cai, Linfeng Chen, Jan W. Van Egmond, Michael W. Tilston
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Publication number: 20120116029Abstract: The present disclosure relates to a method for polymerizing polypropylene, optionally with one or more additional comonomers in a gas phase reactor in the presence of a mixed electron donor system comprising at least one selectivity control agent and at least one activity limiting agent. The process involves controlling the polymerization process to ensure that the difference between the reactor temperature and the dew point temperature of the incoming monomer stream is 12° C. or greater.Type: ApplicationFiled: November 8, 2010Publication date: May 10, 2012Inventors: Jan W. Van Egmond, Ping Cai
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Publication number: 20110172377Abstract: A process for polymerizing one or more olefins in a gas-phase polymerization reactor is provided. The gas-phase reactor has a fluidized bed and a fluidizing medium. The fluidizing medium has an operating density and an operating velocity. The process includes determining a critical gas velocity and/or determining a critical gas velocity for the polymerization. The operating gas density and/or the operating gas velocity for the fluidizing medium is then adjusted to be less than or equal to its respective critical value. The process includes increasing the bulk density of the fluidized bed. The increase in the fluidized bed bulk density increases productivity without increasing reactor residence time.Type: ApplicationFiled: August 21, 2008Publication date: July 14, 2011Inventors: Ping W. Cai, Roger B. Painter, Jan W. Van Egmond
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Publication number: 20110152424Abstract: The present invention relates to an improvement for gas phase olefin polymerization process under two or more different flow regimes. The process involves adding a mixed electron donor system to a reactor having two or more different flow regimes, wherein the mixed electron donor system comprises at least one selectivity control agent and at least one activity limiting agent. The invention is particularly well suited for reactor systems which include a regime characterized by having a low-velocity or high-solid holdup, which have been reported to have operational problems such as particle agglomeration and formation of polymer “chunks”.Type: ApplicationFiled: December 16, 2010Publication date: June 23, 2011Applicant: Dow Global Technologies Inc.Inventors: Ping Cai, Linfeng Chen, Jan W. Van Egmond, Michael W. Tilston
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Publication number: 20110152067Abstract: A catalyst composition for the polymerization of propylene is provided. The catalyst composition includes one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors, one or more aluminum containing cocatalysts and a selectivity control agent (SCA). The SCA is a mixture of an activity limiting agent and a silane composition. The catalyst composition has a molar ratio of aluminum to total SCA from 0.5:1 to 4:1. This aluminum/SCA ratio improves polymerization productivity and the polymer production rate. The catalyst composition is self-extinguishing.Type: ApplicationFiled: August 21, 2008Publication date: June 23, 2011Inventors: Linfeng Chen, Richard E. Campbell, JR., Jan W. Van Egmond
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Publication number: 20100167058Abstract: A process for producing a heterophasic copolymer is provided. The process includes introducing an antifoulant to a second polymerization reactor which operates in series with a first polymerization reactor. The antifoulant may be a multicomponent antifoulant and/or a coating agent. Provision of either antifoulant enables the production of a heterophasic copolymer with an Fc value from about 10% to about 50% by inhibiting reactor fouling during polymerization.Type: ApplicationFiled: December 21, 2009Publication date: July 1, 2010Inventors: Jan W. Van Egmond, Roger B. Painter, Zuzanna Kulik, Joel D. Wieliczko
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Patent number: 7598328Abstract: A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising: 1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound, 2) a hafnium complex of a polyvalent, Lewis base ligand; and optionally, 3) an activating cocatalyst for the metal complex.Type: GrantFiled: June 22, 2006Date of Patent: October 6, 2009Assignee: Dow Global Technologies, Inc.Inventors: Joseph N. Coalter, III, Jan W. Van Egmond, Lewis J. Fouts, Jr., Roger B. Painter, Paul C. Vosejpka
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Publication number: 20080171839Abstract: A catalyst composition, method of formation and process of use in the polymerization of olefin monomers, said composition comprising a catalyst compound, an activator capable of converting said catalyst compound into an active catalyst for addition polymerization, optionally a carrier, further optionally a liquid diluent, and a hydroxycarboxylate metal salt additive.Type: ApplicationFiled: February 18, 2008Publication date: July 17, 2008Applicant: Dow Global Technologies Inc.Inventors: Joseph N. Coalter, Jan W. Van Egmond, Curt N. Theriault, Roger B. Painter
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Patent number: 7365039Abstract: A catalyst composition, method of formation and process of use in the polymerization of olefin monomers, said composition comprising a catalyst compound, an activator capable of converting said catalyst compound into an active catalyst for addition polymerization, optionally a carrier, further optionally a liquid diluent, and a hydroxycarboxylate metal salt additive.Type: GrantFiled: February 20, 2004Date of Patent: April 29, 2008Assignee: Dow Global Technologies Inc.Inventors: Joseph N. Coalter, III, Curt N. Theriault, Jan W. Van Egmond, Roger B. Painter
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Patent number: 7115689Abstract: A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising: 1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound, 2) a Group 4 metal complex of a polyvalent, Lewis base ligand; and optionally, 3) an activating cocatalyst for the metal complex.Type: GrantFiled: November 5, 2002Date of Patent: October 3, 2006Assignee: Dow Global Technologies Inc.Inventors: Joseph N. Coalter, III, Jan W. Van Egmond, Lewis J. Fouts, Jr., Roger B. Painter, Paul C. Vosejpka
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Publication number: 20040220051Abstract: A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising: 1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound, 2) a Group 4 metal complex of a polyvalent, Lewis base ligand; and optionally, 3) an activating cocatalyst for the metal complex.Type: ApplicationFiled: April 7, 2004Publication date: November 4, 2004Inventors: Joseph N. Coalter III, Jan W. Van Egmond, Lewis J. Fouts Jr, Roger B. Painter, Paul C. Vosejpka