Patents by Inventor Pirjo Jaeaeskelaeinen
Pirjo Jaeaeskelaeinen 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: 9309393Abstract: Propylene polymer composition comprising a polypropylene (A), an elastomeric copolymer (B) of ethylene and at least one ?-olefin comonomer selected form the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene and 1-octene, and an ethylene C2 to C8 alkyl acrylate copolymer (C) wherein the composition has a strain hardening SH3.0/2.5 (at a Hencky strain rate of 3 s?1) of at least 0.5.Type: GrantFiled: October 1, 2008Date of Patent: April 12, 2016Assignee: Borealis Technology OyInventors: Klaus Bernreitner, Tung Pham, Espen Ommundsen, Pirjo Jääskeläinen
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Patent number: 9079988Abstract: 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: GrantFiled: October 6, 2009Date of Patent: July 14, 2015Assignee: Borealis AGInventors: Michiel Bergstra, John Severn, Torvald Vestberg, Pauli Leskinen, Bo Malm, Olli Tuominen, Pirjo Jääskeläinen
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Publication number: 20140079899Abstract: Propylene copolymer a. comprising at least 1-hexene as a comonomer, b. having a comonomer content in the range of 1.0 to 3.0 wt.-%, c. having a xylene soluble fraction equal or below 2.5 wt.-%, and d. being partially crystallized in the ?-modification.Type: ApplicationFiled: November 20, 2013Publication date: March 20, 2014Applicant: Borealis AGInventors: Klaus Bernreitner, Manfred Stadlbauer, Norbert Hafner, Wilfried Töltsch, Pirjo Jääskeläinen
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Patent number: 8394893Abstract: The invention relates to a heterophasic alpha-olefÊn random copolymer composition with a melting temperature (Tm) of at least 130° C. and a flexural modulus of not higher than 1000 MPa5 whereby the inventive composition comprises an al-pha-olefin random copolymer component (A) of at least two alpha-olefÊn (co)polymer fractions (i) and (ii) having a different comonomer content, whereby at least one of the fractions is an alpha-olefÊn random copolymer, and a rubber component (B).Type: GrantFiled: January 12, 2006Date of Patent: March 12, 2013Assignee: Borealis Polymers OyInventors: Torwald Vestberg, Bo Malm, Pirjo Jääskeläinen
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Patent number: 8288481Abstract: Novel polyolefin compositions comprising (A) a first propylene-ethylene random copolymer and (B) a second propylene-ethylene random copolymer, wherein the polyolefin composition has an ethylene content CMAB of 1-10 wt % and an MFR(AB) of 3-20 g/10 min with the proviso that CMAB>CMA and MFR(A)/MFR(AB)>1.45 and where the polyolefin composition further has a randomness R of the ethylene distribution in the polymer chain of ?0.945. Articles made from the novel polyolefin compositions have excellent optical properties even after subjecting them to a heat sterilization step.Type: GrantFiled: August 26, 2008Date of Patent: October 16, 2012Assignee: Borealis Technology OyInventors: Joachim Fiebig, Markus Gahleitner, Pirjo Jääskeläinen, Bo Malm, Tonja Schedenig
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Publication number: 20110293869Abstract: The present invention provides polymer compositions, comprising a random propylene copolymer having an MFR2 value of 70 or more (g/10 min), which is in particular suitable for preparing thin-walled packaging products by injection molding.Type: ApplicationFiled: June 29, 2007Publication date: December 1, 2011Applicant: BOREALIS TECHNOLOGY OYInventors: Elina Myhre, Pirjo Jääskeläinen
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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: 20110104416Abstract: Propylene copolymer a. comprising at least 1-hexene as a comonomer, b. having a comonomer content in the range of 1.0 to 3.0 wt.-%, c. having a xylene soluble fraction equal or below 2.5 wt.-%, and d. being partially crystallized in the ?-modification.Type: ApplicationFiled: May 20, 2009Publication date: May 5, 2011Applicant: Borealis AGInventors: Klaus Bernreitner, Manfred Stadlbauer, Norbert Hafner, Wilfried Töltsch, Pirjo Jääskeläinen
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Publication number: 20100272939Abstract: Novel polyolefin compositions comprising (A) a first propylene-ethylene random copolymer and (B) a second propylene-ethylene random copolymer, wherein the polyolefin composition has an ethylene content CMAB of 1-10 wt % and an MFR(AB) of 3-20 g/10 min with the proviso that CMAB>CMA and MFR(A)/MFR(AB)>1.45 and where the polyolefin composition further has a randomness R of the ethylene distribution in the polymer chain of 0.945. Articles made from the novel polyolefin compositions have excellent optical properties even after subjecting them to a heat sterilisation step.Type: ApplicationFiled: August 26, 2008Publication date: October 28, 2010Applicant: Borealis Technology OyInventors: Joachim Fiebig, Markus Gahleitner, Pirjo Jääskeläinen, Bo Malm, Tonja Schedenig
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Publication number: 20100249326Abstract: Propylene polymer composition comprising a polypropylene (A), an elastomeric copolymer (B) of ethylene and at least one ?-olefin comonomer selected form the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene and 1-octene, and an ethylene C2 to C8 alkyl acrylate copolymer (C) wherein the composition has a strain hardening SH3.0/2.5 (at a Hencky strain rate of 3 s?1) of at least 0.5.Type: ApplicationFiled: October 1, 2008Publication date: September 30, 2010Applicant: BOREALIS TECHNOLOGY OYInventors: Klaus Bernreitner, Tung Pham, Espen Ommundsen, Pirjo Jääskeläinen
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Publication number: 20090018267Abstract: The present invention concerns a polypropylene composition comprising a nucleated propylene homopolymer having improved optical properties.Type: ApplicationFiled: December 22, 2006Publication date: January 15, 2009Applicant: Borealis Technology OyInventors: Torvald Vestberg, Pirjo Jaeaeskelaeinen
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Patent number: 7470756Abstract: The present invention relates to a process for preparing a propylene random copolymer comprising polymerisation of propylene with a comonomer, said comonomer being ethylene or an ?-olefin comprising at least four carbon atoms, in the presence of a catalyst in a muiltistage process comprising polymerisation of propylene with a comonomer in a first reaction zone including at least one slurry reactor to give a first polymerisation product, transferring said first product to a second reaction zone including at least one gas phase reactor and polymerisations of propylene with a comonomer in said gas phase reactor in the presence of said first polymerisation product, wherein the temperature in the gas phase reactor is at least 10° C. higher than in the slurry reactor and to a polymer obtainable by this process.Type: GrantFiled: June 26, 2002Date of Patent: December 30, 2008Assignee: Borealis Technology OyInventors: Pirjo Jääskeläinen, Norbert Hafner, Päivi Pitkänen, Markus Gahleitner, Olli Tuominen, Wilfried Töltsch
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Patent number: 7465775Abstract: This invention relates to a process for the production of a polymer film or fibre wherein a polymer composition comprising a propylene homo- or copolymer is formed into a film or fibre, and wherein said propylene homo or copolymer is produced in a process which comprises the polymerization of propylene monomers or propylene monomers and one or more types of comonomers in the presence of a high yield Ziegler-Natta olefin polymerization catalyst, which catalyst comprises a component in the form of particles having a predetermined size range which has been produced in a process comprising: a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said material with said electron donor or a precursor thereof in an organic liquid reaction medium, b) reacting said complex in solution with a compound of a transition metal to procedure an emulsion the dispersed phase of which containing more than 50 mol % of the Group 2 metal in said complex, c) maintaining the particlesType: GrantFiled: June 4, 2004Date of Patent: December 16, 2008Assignee: Borealis Technology OyInventors: Torvald Vestberg, Pirjo Jääskeläinen
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Patent number: 7452953Abstract: The present invention relates to a process for preparing a propylene random copolymer comprising polymerization of propylene with a comonomer, said comonomer being ethylene or an ?-olefin comprising at least four carbon atoms, in the presence of a catalyst in a multistage process comprising polymerization of propylene with a comonomer in a first reaction zone including at least one slurry reactor to give a first polymerization product, transferring said first product to a second reaction zone including at least one gas phase reactor and polymerizations of propylene with a comonomer in said gas phase reactor in the presence of said first polymerization product, wherein the temperature in the gas phase reactor is at least 10° C. higher than in the slurry reactor and to a polymer obtainable by this process.Type: GrantFiled: August 9, 2007Date of Patent: November 18, 2008Assignee: Borealis Technology OyInventors: Pirjo Jääskeläinen, Norbert Hafner, Päivi Pitkänen, Markus Gahleitner, Olli Tuominen, Wilfried Töltsch
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Patent number: 7442743Abstract: The present invention relates to a process for the production of a propylene polymer in a multistage polymerization process comprising the polymerisation of propylene in the presence of a catalyst in a first reaction zone comprising at least one slurry reactor to give a first polymerisation product, transferring said first product to a second reaction zone comprising at least one gas phase reactor and continuing polymerisation of propylene in the gas phase in the presence of said first polymerisation product which is characterised in that the temperature in both the slurry and the gas phase reactor is at least 75° C. and the product of at least one reactor is having an ethylene content in the range of 0.05 to 0.5 wt %. Furthermore, the invention relates to a propylene polymer obtainable by the inventive process, to a propylene polymer which is characterised in that it comprises ethylene comonomer in an amount of 0.05 to 0.5 wt. %, is having a xylene solubles contents of 3.0 wt.Type: GrantFiled: June 26, 2002Date of Patent: October 28, 2008Assignee: Borealis Technology OyInventors: Pirjo Jääskeläinen, Marijke Verpoest, Bert Broeders, Helge Grande
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Patent number: 7220812Abstract: The present invention relates to a process for the production of a propylene polymer in a multistage polymerisation process comprising the polymerisation of propylene in the presence of a catalyst in a first reaction zone comprising at least one slurry reactor to give a first polymerisation product, transferring said first product to a second reaction zone comprising at least one gas phase reactor and continuing polymerisation of propylene in the gas phase in the presence of said first polymerisation product which is characterised in that the temperature in both the slurry and the gas phase reactor is at least 75° C. and the product of at least one reactor is having an ethylene content in the range of 0.05 to 0.5 wt. %. Furthermore, the invention relates to a propylene polymer obtainable by the inventive process, to a propylene polymer which is characterised in that it comprises ethylene comonomer in an amount of 0.05 to 0.5 wt. %, is having a xylene solubles contents of 3.0 wt.Type: GrantFiled: July 27, 2005Date of Patent: May 22, 2007Assignee: Borealis Technology OyInventors: Pirjo Jääskeläinen, Marijke Verpoest, Bert Broeders, Helge Grande
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Publication number: 20060235172Abstract: This invention relates to a process for the production of a polymer film or fibre wherein a polymer composition comprising a propylene homo- or copolymer is formed into a film or fibre, and wherein said propylene homo or copolymer is produced in a process which comprises the polymerization of propylene monomers or propylene monomers and one or more types of comonomers in the presence of a high yield Ziegler-Natta olefin polymerization catalyst, which catalyst comprises a component in the form of particles having a predetermined size range which has been produced in a process comprising: a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said material with said electron donor or a precursor thereof in an organic liquid reaction medium, b) reacting said complex in solution with a compound of a transition metal to procedure an emulsion the dispersed phase of which containing more than 50 mol % of the Group 2 metal in said complex, c) maintaining the particlesType: ApplicationFiled: June 4, 2004Publication date: October 19, 2006Inventors: Torvald Vestberg, Pirjo Jääskeläinen
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Patent number: 6875826Abstract: The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. The polymers are produced by subjecting propylene and optionally other olefins to polymerization in a plurality of polymerization reactors connected in series, employing different amounts of hydrogen as a molar mass modifier in at least two of the reactors, and carrying out the polymerization reaction in the presence of a catalyst system capable of catalyzing the formation of a high molar mass polymerization product having a MFR2 of less than 0.1 g/l0 min and a low or medium molar mass polymerization product having a MFR2 of more than 0.5 g/10 min.Type: GrantFiled: September 28, 1998Date of Patent: April 5, 2005Assignee: Borealis A/SInventors: Päivi Huovinen, Ali Harlin, Pirjo Jääskeläinen, Amir Karbasi, Nina Manner
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Patent number: 6723829Abstract: Polypropylene heterophasic copolymers with good flow and impact properties are made by visbreaking a starting polypropylene heterophasic copolymer of which the amorphous rubber has an intrinsic viscosity of 2 dl/g or more and the ethylene content in the amorphous rubber, determined as C2 of AM, is from 20 wt-% to 45 wt-%.Type: GrantFiled: June 10, 2002Date of Patent: April 20, 2004Assignee: Borealis Technology OyInventors: Bo Malm, Pirjo Jääskeläinen, Torvald Vestberg