Patents by Inventor Michiel Bergstra
Michiel Bergstra 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: 20140202847Abstract: The present invention relates to a process for treating polyolefin granules in a treatment vessel comprising the steps of: —Providing a bed of granules in liquid in said treatment vessel —Withdrawing a first stream of liquid from said treatment vessel, wherein said first stream of liquid contains hydrocarboneous compounds —introducing a first stream of vapour into said treatment vessel —Withdrawing a second stream of vapour from said treatment vessel wherein said second stream of vapour contains volatile hydrocarboneous compounds —Recovering the granules from said treatment vessel wherein said first stream of vapour has a temperature from Tb to Tb+10° C., wherein Tb is the boiling point of the liquid at the applied pressure, and said first stream of vapour produces an upwards rising vapour stream in said treatment vessel, the superficial vapour velocity of which is no more than 0.2 m/s, and a plant suitable for conducting said process.Type: ApplicationFiled: November 12, 2012Publication date: July 24, 2014Applicant: BOREALIS AGInventors: Michiel Bergstra, Kai Hagane, Manfred Jarzombek, Pablo Ivan Aguayo Arellano
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Publication number: 20140080991Abstract: The invention relates to a reactor assembly for the production of polymers including a fluidized bed reactor (1) comprising a bottom zone (5), a middle zone (6) and an upper zone (7), an inlet (8) for the fluidization gas located in the bottom zone (5), an outlet (9) for the fluidization gas located in the upper zone (7); the outlet (9) for the fluidization gas being coupled with the fluidized bed reactor (1) via inlet (8); the equivalent cross-sectional diameter of the bottom zone (5) being monotonically increasing with respect to the flow direction of the fluidization gas through the fluidized bed reactor; the middle zone (6) having an essentially constant equivalent cross-sectional diameter with respect to the flow direction of the fluidization gas through the fluidized bed reactor; the equivalent cross-sectional diameter of the upper zone (7) being monotonically decreasing with respect to the flow direction of the fluidization gas through the fluidized bed reactor; wherein that the ratio of the height ofType: ApplicationFiled: March 2, 2012Publication date: March 20, 2014Applicant: BOREALIS AGInventors: Erik Eriksson, Michiel Bergstra, Klaus Nyfors, Günter Weickert
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Publication number: 20140069547Abstract: Coating composition comprising an ethylene copolymer containing not more than 5 mole-% comonomer, whereby the fraction of the ethylene copolymer having a molecular weight of 300 000 g/mol-600 000 g/mol has a methyl branching of more than 4.0 Methyl per 1000 C as determined by SEC/FT-IR analysis.Type: ApplicationFiled: May 4, 2012Publication date: March 13, 2014Applicant: BOREALIS AGInventors: Tuomas Noopila, Erik Eriksson, Magnus Palmlöf, Jari Häönen, Michiel Bergstra, Leif Leiden, Martin Anker, Siw Bodil Fredriksen
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Publication number: 20140058051Abstract: Reactor assembly for the production of polymers including a fluidized bed reactor (1) comprising a bottom zone (5), a middle zone (6) and an upper zone (7), an inlet (8) for the fluidization gas located in the bottom zone (5), an outlet (9) for the fluidization gas located in the upper zone (7); the outlet (9) for the fluidization gas being coupled with the fluidized bed reactor (1) via inlet (8) via a gas circulation line; means for separation of solids from gas (2) being connected to said gas circulation line; the equivalent cross-sectional diameter of the upper zone (7) being monotonically decreasing with respect to the flow direction of the fluidization gas through the fluidized bed reactor; the middle zone (6) having an essentially constant equivalent cross-sectional diameter with respect to the flow direction of the fluidization gas through the fluidized bed reactor; the equivalent cross-sectional diameter of the bottom zone (5) being monotonically increasing with respect to the flow direction of the flType: ApplicationFiled: March 2, 2012Publication date: February 27, 2014Applicant: BOREALIS AGInventors: Günter Weickert, Erik Eriksson, Michiel Bergstra, Klaus Nyfors
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Publication number: 20130309431Abstract: Heterophasic propylene copolymer comprising (a) a matrix (M) being a polypropylene (PP), said polypropylene (PP) has a polydispersity index (PI) of at least 5.0, and (b) an elastomeric propylene copolymer (EC) dispersed in said matrix (M), wherein (i) said heterophasic propylene copolymer has a melt flow rate MFR2 (230° C.) of equal or below 1.0 g/10 min, (ii) the amorphous phase (AM) of the xylene cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity (IV) of at least 3.5 dl/g.Type: ApplicationFiled: March 14, 2011Publication date: November 21, 2013Applicant: Borealis AGInventors: Michiel Bergstra, Pauli Leskinen, Bo Malm, Cornelia Kock
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Patent number: 8557917Abstract: The present invention relates to a process for the preparation of a propylene homo- or copolymer, comprising the following steps: (i) feeding propylene and hydrogen, and optionally one or more comonomers, to a reactor R1, wherein the hydrogen is fed to the reactor R1 in a periodically varying amount, (ii) preparing a first fraction of the propylene homo- or copolymer in the reactor R1 in the presence of a catalyst, (iii) transferring the first fraction to a reactor R2, and (iv) preparing a second fraction of the propylene homo- or copolymer in the reactor R2, wherein the melt flow rate MFR (2.16 kg, 230° C.) of the propylene homo- or copolymer is higher than the melt flow rate MFR (2.16 kg, 230° C.) of the first fraction.Type: GrantFiled: October 6, 2009Date of Patent: October 15, 2013Assignee: Borealis AGInventors: Pauli Leskinen, Michiel Bergstra
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Patent number: 8354483Abstract: The invention relates to a reactor system and process for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for displacing metered quantities of polymerized particles from the moving bed unit into the fluidized bed unit, and to the use of such reactor system.Type: GrantFiled: December 23, 2008Date of Patent: January 15, 2013Assignee: Borealis Technology OYInventors: Michiel Bergstra, Erik Eriksson, Gunter Weickert
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Patent number: 8278402Abstract: The invention relates to a reactor system for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are directly connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for pneumatically displacing polymer particles from the moving bed unit into the fluidized bed unit.Type: GrantFiled: December 23, 2008Date of Patent: October 2, 2012Assignee: Borealis Technology OyInventors: Michiel Bergstra, Erik Eriksson, Gunter Weickert
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Patent number: 8217125Abstract: A process for producing polyolefins, which includes polymerizing at least one olefin monomer, separating at least a part of the reaction mixture, dividing the separated reaction mixture into a polymer-lean fraction and a polymer-rich fraction, and subjecting at least a part of the polymer-lean fraction to a purification step prior to recycling back to the polymerization of at least one olefin monomer. The obtained polyolefins particularly have a low content of volatile low molecular weight compounds, a low content of low-molecular weight polyolefin waxes and a low content of residues derived from the catalyst employed.Type: GrantFiled: May 22, 2007Date of Patent: July 10, 2012Assignee: Borealis Technology OyInventors: Amir Kiumars Karbasi, Esa Korhonen, Michiel Bergstra
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Publication number: 20120165440Abstract: The present invention aims to provide a multimodal polymer of propylene comprising a matrix of semicrystalline polymer and a rubber (D) dispersed in said matrix, the multimodal polymer comprising units derived from propylene of from 85 to 99% by weight and units derived from ethylene or C4 to C10 alpha-olefins of from 1 to 15% by weight. The multimodal polymer has a fraction soluble in xylene XS at a temperature of 25° C. of from 7 to 16% by weight, a melt flow rate MFR2 of from 0.05 to 5 g/10 min, a polydispersity index PI of from 3.5 to 30, and a tensile modulus TM and XS meeting the relationship TM?2375?46.2·XS. Furthermore, the present invention aims to produce the above-mentioned multimodal polymer in a process comprising several reaction steps or zones. The compositions comprising the multimodal polymer of propylene have excellent stiffness combined with good impact strength at a low temperature.Type: ApplicationFiled: February 24, 2010Publication date: June 28, 2012Applicant: BOREALIS AGInventors: Michiel BERGSTRA, Bo MALM, Jari HATONEN, Erik ERIKSSON, Arild FOLLESTAD, Pauli LESKINEN
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Publication number: 20110290529Abstract: The present invention relates to a cable comprising a conductor surrounded by one or more layers, wherein at least one layer comprises a polymer composition comprising a multimodal copolymer of ethylene with one or more comonomers, to a process for producing the cable and to a polymer composition suitable as a cable layer material.Type: ApplicationFiled: October 12, 2009Publication date: December 1, 2011Applicant: Borealis AGInventors: Anneli Pakkanen, Petri Rekonen, Michiel Bergstra, Thomas Steffl
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Publication number: 20110288213Abstract: The present invention aims to provide a multimodal polymer of propylene comprising a matrix of semicrystalline polymer and a rubber (D) dispersed in said matrix, the multimodal polymer comprising units derived from propylene of from 85 to 99% by weight and units derived from ethylene or C4 to C10 alpha-olefins of from 1 to 15% by weight. The multimodal polymer has a fraction soluble in xylene XS at a temperature of 25° C. of from 7 to 16% by weight, a melt flow rate MFR2 of from 0.05 to 5 g/10 min, a polydispersity index P1 of from 3.5 to 30, and a tensile modulus TM and XS meeting the relationship TM?2375?46.2 XS. Furthermore, the present invention aims to produce the above-mentioned multimodal polymer in a process comprising several reaction steps or zones. The compositions comprising the multimodal polymer of propylene have excellent stiffness combined with good impact strength at a low temperature.Type: ApplicationFiled: February 24, 2010Publication date: November 24, 2011Applicant: BOREALIS AGInventors: Michiel Bergstra, Bo Malm, Jari Hatonen, Erik Eriksson, Arild Follestad, Pauli Leskinen
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Publication number: 20110224387Abstract: The present invention relates to a process for the preparation of a propylene copolymer P1 having ethylene-derived comonomer units, which comprises the following steps: (i) introducing propylene, ethylene, and hydrogen into a polymerisation reactor R1, wherein the ethylene is fed to the polymerisation reactor R1 in a periodically varying amount, (ii) preparing the propylene copolymer in the polymerisation reactor R1 in the presence of a catalyst.Type: ApplicationFiled: October 6, 2009Publication date: September 15, 2011Applicant: BOREALIS AGInventors: Michiel Bergstra, John Severn, Torvald Vestberg, Pauli Leskinen, Bo Malm, Olli Tuominen, Pirjo Jääskeläinen
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Publication number: 20110174415Abstract: The present invention relates to a process for the preparation of a propylene homo- or copolymer, comprising the following steps: (i) feeding propylene and hydrogen, and optionally one or more comonomers, to a reactor R1, wherein the hydrogen is fed to the reactor R1 in a periodically varying amount, (ii) preparing a first fraction of the propylene homo- or copolymer in the reactor R1 in the presence of a catalyst, (iii) transferring the first fraction to a reactor R2, and (iv) preparing a second fraction of the propylene homo- or copolymer in the reactor R2, wherein the melt flow rate MFR (2.16 kg, 230° C.) of the propylene homo- or copolymer is higher than the melt flow rate MFR (2.16 kg, 230° C.) of the first fraction.Type: ApplicationFiled: October 6, 2009Publication date: July 21, 2011Applicant: Borealis AGInventors: Pauli Leskinen, Michiel Bergstra
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Patent number: 7851567Abstract: The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.Type: GrantFiled: August 8, 2006Date of Patent: December 14, 2010Assignee: Borealis Technology OyInventors: Henrik Andtsjoe, Michiel Bergstra, Ralf Karlsson, Klaus Nyfors, Urban Thorngren
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Publication number: 20100273971Abstract: The invention relates to a reactor system for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are directly connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for pneumatically displacing polymer particles from the moving bed unit into the fluidized bed unit.Type: ApplicationFiled: December 23, 2008Publication date: October 28, 2010Applicant: BOREALIS TECHNOLOGY OYInventors: Michiel Bergstra, Erik Eriksson, Gunter Weickert
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Publication number: 20100267915Abstract: The invention relates to a reactor system and process for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for displacing metered quantities of polymerized particles from the moving bed unit into the fluidized bed unit, and to the use of such reactor system.Type: ApplicationFiled: December 23, 2008Publication date: October 21, 2010Applicant: BOREALIS TECHNOLOGY OYInventors: Michiel Bergstra, Erik Eriksson, Gunter Weickert
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Publication number: 20100267916Abstract: The invention relates to a reactor system and process for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerization particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein in the fluidized bed unit is positioned shielding means such that via the outlet of the moving bed unit inflow of fluidization gas is inhibited and outflow of polymerization particles is allowed and to a process and use thereof.Type: ApplicationFiled: December 23, 2008Publication date: October 21, 2010Applicant: BOREALIS TECHNOLOGY OYInventors: Michiel Bergstra, Erik Eriksson, Gunter Weickert
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Publication number: 20090137753Abstract: The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.Type: ApplicationFiled: August 8, 2006Publication date: May 28, 2009Applicant: BOREALIS TECHNOLOGY OYInventors: Henrik Andtsjö, Michiel Bergstra, Ralf Karlsson, Klaus Nyfors, Urban Thorngren