Patents Represented by Attorney Dilworth IP, LLC
  • Patent number: 8344099
    Abstract: A method for treating polymer particles with steam in a steaming vessel downstream a polymerization process, the method comprising contacting polymer particles with a counter-current flow of steam, wherein the flow rate of steam entering said steaming vessel is continuously maintained proportional to the production rate of said polymer in said polymerization process and to the gradient between the temperature (Tout) of the polymer exiting said steaming vessel and the temperature (Tin) of the polymer entering said steaming vessel.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: January 1, 2013
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Giorgio Ballarini, Antonio Mileo, Luca Soffritti, Enrico Soffritti, legal representative
  • Patent number: 8344086
    Abstract: 1-butene/ethylene/propylene terpolymer containing: c) from 4 to 10 wt % of ethylene derived units, and d) from 2 to 10 wt % of propylene derived units; the said terpolymer having the following properties: distribution of molecular weights (Mw/Mn) measured by GPC lower than 3; no melting point detectable at the DSC; melting enthalpy, measured after 10 days of aging at room temperature, from 12 to 20 J/g.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: January 1, 2013
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Giampaolo Pellegatti, Stefano Spataro, Tiziana Caputo
  • Patent number: 8343602
    Abstract: Use of propylene copolymers with up to 50 wt % of units derived from at least one linear or branched alpha-olefin having from 2 to 10 carbon atoms other than propylene for producing injection-molded coating on a metallic pipe.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: January 1, 2013
    Assignee: Basell Poliolefine Italia, s.r.l.
    Inventor: Gian Luigi Rigosi
  • Patent number: 8338548
    Abstract: A process for the gas-phase polymerization of one or more alpha-olefins in the presence of a polymerization catalyst, the process comprising: at least a polymerization step wherein the polymer particles flow downward in densified form under the action of gravity so as to form a densified polymer bed; metering an anti-fouling agent in said polymerization step by means of at least N feeding lines placed at different heights of said densified polymer bed, N being the integer number satisfying the equation N?(1+0.08·H), where H is the height (expressed in meters) of the polymer bed.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: December 25, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Antonio Mazzucco, Tiziana Caputo, Riccardo Rinaldi
  • Patent number: 8338543
    Abstract: Thermoplastic vulcanizate elastomer obtained by dynamic vulcanization of a heterophasic polyolefin composition in presence of at least (i) an alkenyl-substituted alkoxysilane grafting agent and (ii) water; wherein said heterophasic polyolefin composition has flexural modulus equal to or lower than 150 MPa, and comprises: (a) a crystalline propylene homopolymer or copolymer of propylene with up to 15% of ethylene or other alpha-olefin comonomer(s), or their combinations, and (b) a copolymer or a composition of copolymers of ethylene with other alpha-olefins, containing from 15% to 40% of ethylene, said thermoplastic vulcanizate elastomer having compression set values in the range from 45-65%, the ratio of elongation at break to compression set values over 10 and hardness shore A values below 90.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: December 25, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Gilberto Moscardi, Enrico Costantini
  • Patent number: 8309659
    Abstract: Filled polyolefin compositions comprising: A) from 20% to 80% by weight of a polypropylene component; B) from 20% to 80% by weight of a filler; wherein the percentages of A) and B) are referred to the sum of A) and B), and A) is selected from the following compositions: a) a polypropylene composition containing from 20% to 80% by weight of a polypropylene fraction AI) having a Melt Flow Rate value of 500 g/10 min. or more, and from 20% to 80% by weight of a polypropylene fraction AII) having a Melt Flow Rate value of from 0.1 to 30 g/10 min., the said percentages of AI) and AII) being referred to the sum of AI) and AII); or b) a polypropylene composition containing from 15% to 72% by weight of a polypropylene fraction AI) having a Melt Flow Rate value of 500 g/10 min. or more, from 15% to 70% by weight of a polypropylene fraction AII) having a Melt Flow Rate value of from 0.1 to 30 g/10 min. and from 0.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: November 13, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Enrico Masarati, Enrico Costantini, Marco Consalvi
  • Patent number: 8304487
    Abstract: Concentrates comprising a blend of polybutene-1 and polypropylene and up to 60 wt. % of one or more additives, in particular suitable for use in processes of bulk coloring and spinning of polyolefins.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: November 6, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Fulvio Malacarne, Franco Sartori
  • Patent number: 8293855
    Abstract: A method for transitioning from a first to a second catalyst system for the olefin polymerization reaction in one reactor, wherein the first catalyst system is incompatible with the second catalyst system, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the first catalyst system; and b) performing a second olefin polymerization reaction in the presence of the second catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the Mw of the first polyolefin fraction is less than the Mw of the second polyolefin fraction and the initial activity of catalyst component (A) exceeds the initial activity of catalyst component (B).
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: October 23, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerhardus Meier, Shahram Mihan, Massimo Covezzi
  • Patent number: 8283425
    Abstract: Adducts are provided comprising MgCl2, ethanol and a Lewis base (LB), said compounds being present in molar ratios defined by the following formula MgCl2.(EtOH)n(LB)p in which n is from 2 to 6 and p has values satisfying the following equation p/(n+p)?0.1. The said adducts can be used as precursor in the preparation of high activity ZN catalysts.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: October 9, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Gianni Collina, Daniele Evangelisti, Mario Sacchetti
  • Patent number: 8273835
    Abstract: Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a tubular reactor with at least two spatially separated initiator injection points, wherein injecting initiator rises the temperature of the reaction mixture in the reaction zone following the injection point, and the first initiator injection point of the tubular reactor is not provided with initiator or is provided with so little initiator that the temperature of the reaction mixture does not rise more than 20° C.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: September 25, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Dieter Littmann, Andre-Armand Finette, Hans Joachim Meinke
  • Patent number: 8268425
    Abstract: The invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for producing external sheathing of electric or information transmission cables. The molding composition has a density at a temperature of 23° C. in the range from 0.94 to 0.95 g/cm3 and an MFI190/5 in the range from 1.2 to 2.1 dg/min. It comprises from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 30 to 40% by weight of a high molecular weight copolymer B of ethylene and another olefin having from 4 to 8 carbon atoms and from 10 to 20% by weight of an ultra high molecular weight ethylene copolymer C. The invention also relates to an electric or information transmission cable having an external sheath of the polyethylene molding composition which has a thickness in the range from 0.2 to 3 cm.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: September 18, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Heinz Vogt, Joachim Berthold
  • Patent number: 8252399
    Abstract: Plastic tanks comprising a propylene-hexene-1 copolymer having a xylene soluble fraction lower than 5% wt with respect to the total weight of the copolymer and satisfying the following relation: A · T m B > 70 wherein A is the MFR measured according to the method ISO 1133 (230° C., 5 kg) expressed in g/10 min, Tm is the melting temperature measured by DSC expressed in ° C. and B is the hexene-1 content expressed in percentage by weight with respect to total weight of the copolymer.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 28, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventor: Claudio Cavalieri
  • Patent number: 8252875
    Abstract: Process for the preparation of monoimine compounds, wherein a dicarbonyl compound is reacted in an aliphatic, non-aromatic solvent with aniline. Monoimine compounds having electron-withdrawing substituents in the ortho position and unsymmetric bis(imino) compounds and unsymmetric iron complexes prepared therefrom and the use thereof in the polymerization of olefins.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: August 28, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Shahram Mihan, Benno Bildstein, Lars Kölling, Alexander Solchinger, Sascha Schlawjinski
  • Patent number: 8247587
    Abstract: The present invention relates to monohydroindacenyl complexes as active catalytic components in the copolymerization of ethylene. The complexes are suitable for direct preparation of ethylene copolymers having a narrow molecular distribution as well as the desired levels of low density and preferably a predetermined value of glass transition temperature Tg. The produced copolymers showing improved elastomeric performance can be prepared in a single step during polymerization reaction, thus avoiding a blending step following the polymerization step.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: August 21, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Fabiana Fantinel, Shahram Mihan
  • Patent number: 8227550
    Abstract: Filled polyolefin compositions comprising: A) from 15% to 55% by weight of a polypropylene component; B) from 20% to 80% by weight of a filler; C) from 4% to 25% of an elastomeric polymer or polymer composition; wherein the percentages of A), B) and C) are referred to the sum of A) B) and C), and A) is selected from the following compositions: a) a polypropylene composition containing from 20% to 80% by weight of a polypropylene fraction AI) having a Melt Flow Rate L (MFRI) value of 500 g/10 min. or more, and from 20% to 80% by weight of a polypropylene fraction AII) having a Melt Flow Rate L (MFRII) value of from 0.1 to 30 g/10 min., the said percentages of AI) and AII) being referred to the sum of AI) and AII); or b) a polypropylene composition containing from 15% to 72% by weight of a polypropylene fraction AI) having a Melt Flow Rate L (MFRI) value of 500 g/10 min. or more, from 15% to 70% by weight of a polypropylene fraction AII) having a Melt Flow Rate L (MFRII) value of from 0.1 to 30 g/10 min.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: July 24, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Enrico Masarati, Enrico Costantini, Marco Consalvi
  • Patent number: 8227557
    Abstract: Specific iron complexes (A), a catalyst system for polymerization of olefins comprising at least one metal complex (A) and/or (A?), a prepolymerized catalyst system, the use of these catalyst systems for the polymerization of olefins, and a process for the preparation of polyolefins by polymerization or copolymerization of olefins in the presence of one of the described catalyst systems.
    Type: Grant
    Filed: March 1, 2008
    Date of Patent: July 24, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Shahram Mihan, Fabiana Fantinel, Reynald Chevalier, Harald Schmitz
  • Patent number: 8227563
    Abstract: A process for the preparation of 1-butene homopolymers or 1-butene/alpha olefin copolymers wherein the alpha olefins are selected from ethylene, propylene or alpha olefins of formula CH2?CHZ wherein Z is a C3-C20 alkyl radical, comprising contacting 1-butene or 1-butene and one or more alpha olefins under polymerization conditions in the presence of a catalyst system comprising: (a) a solid component comprising a Ti compound and an internal electron-donor compound supported on MgCl2 (b) an alkylaluminum cocatalyst; and (c) a compound of formula (I) as external donor Wherein: R1, R2, R3 and R4, equal to or different from each other, are hydrogen atoms or C1-C20 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; or two R1, R2, R3 and R4 can be joined to form a C5-C20, saturated or unsaturated ring.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 24, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Gianni Vitale, Fabrizio Piemontesi, Ines Mingozzi, Isabella Maria Vittoria Camurati, Giampaolo Pellegatti
  • Patent number: 8222356
    Abstract: A process for preparing polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with 1-alkenes and has a molar mass distribution width Mw/Mn of from 5 to 30, a density of from 0.92 to 0.955 g/cm3, a weight average molar mass Mw of from 50000 g/mol to 500 000 g/mol and has from 0.01 to 20 branches/1000 carbon atoms and a z-average molar mass Mz of less than 1 million g/mol.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: July 17, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Jennifer Kipke, Shahram Mihan, Rainer Karer, Dieter Lilge
  • Patent number: 8217124
    Abstract: Process for the preparation of ethylene homopolymers or copolymers in a high pressure reactor with at least two spatially separated initiator injection points by polymerizing ethylene and optionally further monomers in the presence of at least two different mixtures of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa, wherein the process comprises the following steps: a) providing at least two different initiators as solution in a suitable solvent or in liquid state, b) mixing the initiators and optionally additional solvent in at least two static mixers and c) feeding each of the mixtures to a different initiator injection point of the high pressure reactor, and apparatus for feeding initiator mixtures to a high pressure reactor with at least two spatially separated initiator injection points.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: July 10, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Dieter Littmann, Andre-Armand Finette, Jürgen Peter Mohrbutter, Sven George Wolfram
  • Patent number: 8207281
    Abstract: The present invention relates to a process for preparing transition metal compounds, in particular ansa-bisindenyl-metallocenes having nitrogen, phosphor, sulfur or oxygen comprising substituents, the corresponding transition metal compounds themselves and their use in the preparation of catalyst systems and also the use of the catalyst systems in the polymerization and copolymerization of olefins.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: June 26, 2012
    Assignee: Basell Polyolefine GmbH
    Inventor: Reynald Chevalier