N-hexene Patents (Class 526/348.5)
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Publication number: 20040122191Abstract: This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30 volume % of one or more solvents and from 0 to 30 mole % of one or more comonomers, under temperature and pressure conditions below the melting point of the propylene polymer and where:Type: ApplicationFiled: September 22, 2003Publication date: June 24, 2004Inventors: Palanisamy Arjunan, Simon X. Zhang, Charles Cozewith
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Publication number: 20040110632Abstract: An olefin polymerization pre-catalyst, an activated catalyst and a process for preparing the catalysts are described herein.Type: ApplicationFiled: November 20, 2003Publication date: June 10, 2004Applicant: The University of Maryland, College ParkInventors: Lawrence R. Sita, Yonghui Zhang
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Patent number: 6747114Abstract: An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one C4 to C20 &agr;-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238(B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRs) equal to and above 250° dg/min. at 230° C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.Type: GrantFiled: December 21, 2000Date of Patent: June 8, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Anthony G. Karandinos, Keith A. Nelson, Jean M. Tancrede, Bruce A. Harrington, David J. Lohse, Olivier J. F. Georjon, Kenneth Lewtas, Sudhin Datta, Charles Cozewith
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Publication number: 20040097669Abstract: Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising silicon bridged metallocenes having a particular ligand system containing a heteroatom.Type: ApplicationFiled: November 3, 2003Publication date: May 20, 2004Applicant: Basell Polyolefine GmbHInventors: Tiziano Dall'Occo, Ofelia Fusco, Maurizio Galimberti, Ilya Nifant'ev, Ilya Laishevtsev
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Publication number: 20040092387Abstract: The present invention provides a method of synthesizing fluorided metallocene catalyst components comprising contacting at least one fluoriding agent comprising fluorine with one or more alkylated metallocene catalyst components comprising one or more non-halogen leaving groups to produce a fluorided catalyst component; wherein from less than 3 equivalents of fluorine are contacted for every equivalent of leaving group.Type: ApplicationFiled: November 7, 2002Publication date: May 13, 2004Inventor: Phillip T. Matsunaga
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Publication number: 20040087435Abstract: Supported catalyst composition for polymerization of olefins comprising: (i) a titanium compound, a magnesium compound and at least one electron donor compound; (ii) a chlorine containing polymer support; and (iii) a cocatalyst comprising at least one aluminum compound, wherein the magnesium loading on the final catalyst is between about 0.20 and 6% by weight.Type: ApplicationFiled: December 18, 2003Publication date: May 6, 2004Inventors: Mansour I. Taftaf, Serajudin F. Ahmed
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Publication number: 20040087745Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.Type: ApplicationFiled: June 26, 2003Publication date: May 6, 2004Applicant: Phillips Petroleum CompanyInventors: Ashish M. Sukhadia, Elizabeth A. Benham, Joseph J. Bergmeister, Rex L. Bobsein, Gerhard K. Guenther, Eric T. Hsieh, Max P. McDaniel, Steven J. Secora, Joseph S. Shveima, John D. Stewart
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Publication number: 20040087751Abstract: A unique thermoplastic olefin composition having: (a) at least 40 percent by weight of a propylene-alpha olefin copolymer based on the total weight of polymers in the composition, the propylene-alpha olefin copolymer having at least 60 percent by weight units derived from propylene, at least 6 percent by weight units derived from an alpha olefin, a moleculare weight distribution less than 3.5, and a broad composition distribution; and (b) at least 20 percent by weight of a polypropylene based on the total weight of polymers in the composition, the polypropylene having at least 93 percent by weight units derived from propylene, a molecular weight distribution of greater than 3.5, a heat of fusion greater than the heat of fusion exhibited by the propylene-alpha olefin copolymer, and a melting point Tmax of at least 120° C.Type: ApplicationFiled: May 5, 2003Publication date: May 6, 2004Inventors: Li-Min Tau, Yunwa Wilson Cheung, Charles F. Diehl, Lonnie G. Hazlitt
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Publication number: 20040077490Abstract: Process for the polymerization of olefins CH=CHR, in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, carried out in the presence of a catalyst component (A) comprising Mg, Ti and halogen as essential elements and of a catalyst component (B) capable to produce, under the same polymerization conditions, a polymer with an average particle size lower than that obtainable with the said catalyst component A. The said process provides polymers with increased bulk density.Type: ApplicationFiled: September 26, 2003Publication date: April 22, 2004Inventors: Gianni Collina, Ofelia Fusco, Eduardo Chicote Carrion, Alberto Gil, Volker Dolle, Horst Klassen, Karl-Heinz Kagerbauer
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Publication number: 20040077806Abstract: A method of lowering MFR response of a high melt flow rate polymer producing metallocene catalyst is provided. The method includes contacting the metallocene catalyst with a sufficient quantity of &agr;,&ohgr;-diene monomer such that when the catalyst composition is contacted with polymerizable reactants under suitable polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 19. Hydrogen and ethylene may also be present in the polymerization. Additionally a catalyst composition is provided which includes a high melt flow rate polymer producing metallocene catalyst and a sufficient quantity of &agr;,&ohgr;-diene monomers such that when the catalyst composition is contacted with a monomer under polymerization conditions, the resulting polymer has an MFR rate in the range of 0.1 to 19.Type: ApplicationFiled: June 24, 2003Publication date: April 22, 2004Inventors: Weiqing Weng, Eric J. Markel, Main Chang, Armenag H. Dekmezian, Palanisamy Arjunan, Olivier J. Georjon
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Publication number: 20040059072Abstract: An ethylene styrene copolymer having isolated styrene monomer units separated by 5 or 6 methylene groups as determined by 13C-NMR may be polymerized in the presence of an activator and a transition metal catalyst containing a phosphinimine ligand.Type: ApplicationFiled: September 20, 2002Publication date: March 25, 2004Applicant: NOVA Chemicals (International) S.A.Inventors: Qinyan Wang, Patrick Lam, Gail Baxter, James Arthur Auger
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Publication number: 20040059070Abstract: An olefin polymerization process and apparatus produce, in a single reactor, a polymer with a broad molecular weight distribution and short chain branching concentrated in the high molecular weight portion of the polymer product. A molecular weight lever, such as hydrogen, is pulsed out of phase with a short chain branching lever, such as 1-hexene, to produce a polymer product having desirable toughness characteristics and improved processability.Type: ApplicationFiled: May 20, 2003Publication date: March 25, 2004Inventors: William M. Whitte, Steven J. Secora, Rebecca L. Jones
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Patent number: 6710146Abstract: The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b1) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl and a free radical initiator or b2) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ether. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, the (co)polymers obtainable by this process and the use of multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyls in combination with a free radical initiator, or a multi-functional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ethers for controlled polymerization. In a particularly preferred embodiment at least one additional heating step at a temperature from 140 to 280° C. is applied after polymerization is completed.Type: GrantFiled: April 3, 2003Date of Patent: March 23, 2004Assignee: Ciba Specialty Chemicals CorporationInventors: Wiebke Wunderlich, Rudolf Pfaendner, Raymond Seltzer, James Peter Galbo
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Publication number: 20040044155Abstract: Novel copolymers comprise ethylene and alpha olefins having from 3 to 10 carbon atoms and which haveType: ApplicationFiled: August 26, 2003Publication date: March 4, 2004Applicant: BP Chemicals LimitedInventors: Choon Kooi Chai, Christopher James Frye
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Publication number: 20040039140Abstract: Catalyst precursor compounds having both (i) a polydentate ligand which comprises a cyclic moiety as well as a heteroatom and (ii) a protected hydride/hydrocarbyl ligand bonded to a metal atom, as well as olefin polymerization catalyst systems based thereupon, polymerization processes using such catalyst systems and polymers produced thereby.Type: ApplicationFiled: August 19, 2003Publication date: February 26, 2004Inventor: Thomas H. Peterson
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Publication number: 20040039139Abstract: An olefin polymerization catalyst is described which includes: (A) a solid catalyst component being prepared by copulverizing a magnesium compound, an aluminum compound, an electron donor and a titanium compound, and (B) an organoaluminum compound. The present invention is also directed to a process for preparing polyolefins using the aforesaid catalyst system to polymerize olefins.Type: ApplicationFiled: August 27, 2003Publication date: February 26, 2004Applicant: Formosa Plastics Co., U.S.A.Inventors: Bing Lu, Honglan Lu, Chih-Jian Chen
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Publication number: 20040033887Abstract: A method for making a solid catalyst component for use in a Ziegler-Natta catalyst includes combining a porous particulate support with a magnesium source in a hydrocarbon solvent to form a mixture, the magnesium source including a hydrocarbon soluble organomagnesium compound and a hydrocarbon insoluble anhydrous inorganic magnesium-halogen compound. The organomagnesium compound is halogenated and the mixture is reacted with a titanium compound or vanadium compound to form the solid catalyst component. The solid catalyst component is then recovered and combined with an organoaluminum cocatalyst to form a Ziegler-Natta catalyst which is advantageously used for the polymerization of olefins, particularly alk-1-enes such as ethylene, propylene, 1-butene, and the like. The catalyst can optionally include internal and external electron donors.Type: ApplicationFiled: August 19, 2002Publication date: February 19, 2004Inventor: Wolf Spaether
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Patent number: 6693155Abstract: A process for polymerizing propylene is disclosed. The propylene is polymerized with a catalyst system which comprises an activator and a [1,2-b]indenoindolyl Group 4-6 transition metal complex having open architecture. The process has high catalyst activity and gives high molecular weight elastomeric polypropylene.Type: GrantFiled: March 5, 2003Date of Patent: February 17, 2004Assignee: Equistar Chemicals, LPInventors: Craig C. Meverden, Gregory G. Hlatky, Shaotian Wang
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Publication number: 20040030082Abstract: An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an &agr;-olefin having 5 to 20 carbon atoms, and has a melt flow rate (MFR) measured at 190° C. under a load of 21.18N according to JIS K7210-1995, of not more than 0.01 g/10 min. and less than 1 g/10 min., wherein the melt flow rate and a melt tension (MT) at 190° C.Type: ApplicationFiled: March 27, 2003Publication date: February 12, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Yuki Iseki
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Publication number: 20040030065Abstract: The present invention relates to a process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a chromium oxide catalyst characterised in that the polymerisation is performed in the presence of a polymer structure modifier.Type: ApplicationFiled: September 11, 2003Publication date: February 12, 2004Inventors: Jean-Jacques Kuhlburger, Kenneth John Rowley
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Patent number: 6689847Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.Type: GrantFiled: November 27, 2001Date of Patent: February 10, 2004Assignee: Univation Technologies, LLCInventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
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Patent number: 6689857Abstract: A high density polyethylene (HDPE) film is provided having high-biaxial orieniation. The film includes HDPE having a density of at least about 0.940, and a melt index of from about 0.5 to about 10. The film is stretched in the machine (longitudinal) direction to a degree of from about 5:1 to about 8:1, preferably from about 6:1 to about 7:1. The film is also stretched in the transverse (lateral) direction to a degree of from about 6:1 to about 15:1, preferably from about 9:1 to about 13:1. Preferably, the film has an orientation imbalance, with a higher degree of transverse orientation than machine orientation. Skin layers such as heat seal layers can be provided. Preferably, the film contains one or more layers of a casting promoter material employed to promote casting of a high gauge HDPE sheet subsequently high biaxially oriented to provide the film. The film can also be cavitated, or otherwise modified (e.g., corona-treated, coated, metallized, etc.) to provide films suitable for special applications.Type: GrantFiled: October 3, 1996Date of Patent: February 10, 2004Assignee: ExxonMobil Oil CorporationInventors: John A. Larter, Robert V. Poirier
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Publication number: 20040024160Abstract: A process comprising polymerizing ethylene, or polymerizing ethylene and at least one other olefin, to produce a polymer is provided.Type: ApplicationFiled: July 29, 2003Publication date: February 5, 2004Applicant: Phillips Petroleum CompanyInventors: Joseph J. Bergmeister, Steven J. Secora, Gerhard Guenther, Elizabeth A. Benham, Max McDaniel
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Publication number: 20040014895Abstract: Blends of very low density polyethylene produced using metallocene catalysts (mVLDPE) and high density polyethylene (HDPE) are disclosed. The polymer blends include a metallocene-catalyzed VLDPE polymer having a density of less than 0.916 g/cm3, the VLDPE polymer preferably being linear and without long chain branching, and a HDPE polymer having a density of greater than 0.940 g/cm3. The polymer blends are particularly suitable in blown and cast film applications.Type: ApplicationFiled: May 21, 2003Publication date: January 22, 2004Inventors: James M Farley, Richard W Halle, Geeorge Panagopoulos, Jerry M Johnson
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Patent number: 6677408Abstract: The invention relates to a method for producing ethylene homo- and copolymers in a tubular reactor at pressures above 1000 bar and temperatures in the range from 120 to 350° C. by free-radical polymerization, in which firstly small amounts of free-radical chain initiators are added to a mobile flow medium comprising ethylene, molecular weight regulator and optionally polyethylene, and the polymerization is then carried out.Type: GrantFiled: December 6, 2001Date of Patent: January 13, 2004Assignee: Basell Polyolefine GmbHInventors: Frank-Olaf Mähling, Andreas Daiss, Georg Groos, Andreas Wölfert
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Publication number: 20030236364Abstract: Provided is a process for polymerizing olefins in the presence of a metallocene catalyst compound having at least one fluoride or fluorine containing leaving group. More particularly, the present invention is directed to a process and catalyst composition having improved reactor performance, reducing or eliminating the need for anti-fouling additives to the catalyst composition and/or the reactor. In one embodiment, the invention is a process of polymerizing olefins comprising contacting ethylene and at least one comonomer with a supported catalyst system comprising a metallocene catalyst compound, the metallocene catalyst compound comprising at least one fluoride ion or fluorine containing leaving group; and wherein the supported catalyst system comprises an inorganic oxide support having an average particle size of from 35 &mgr;m or less and a pore volume of from 1 to 2 cm3/g. The polymer product resulting therefrom is, in one embodiment, a copolymer having a density in the range of from 0.910 g/cm3 to 0.Type: ApplicationFiled: June 18, 2003Publication date: December 25, 2003Inventors: Laughlin G. McCullough, Agapios K. Agapiou
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Patent number: 6667375Abstract: An ethylene-&agr;-olefin copolymer obtained by a gas phase polymerization method in the presence of a catalyst, wherein the copolymer satisfies the following conditions (A-1) to (A-4): (A-1) Melt flow rate (MFR): 0.3 to 5.0 g/10 minutes (A-2) Melt flow rate ratio (MFRR): 20 or more (A-3) Density (d): 0.910 to 0.930 g/cm3 (A-4) Coldxylene-soluble portion (CXS)(wt %) is in the range defined by the formula (1): 1.5×10−4×d−125×MFR0.5+0.3≧CXS formula (1).Type: GrantFiled: August 29, 2000Date of Patent: December 23, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Tadahiro Mitsuno, Seiichiro Ima, Hiroyuki Shiraishi
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Patent number: 6664349Abstract: An ethylene polymerization process is disclosed. The process uses a single-site catalyst that contains a boraaryl ligand. It comprises supporting the catalyst, forming a slurry of the supported catalyst in an organic solvent, mixing the catalyst slurry with trialkyl aluminum compound, and polymerizing ethylene in the presence of the trialkyl aluminum-treated catalyst slurry. The process gives polyethylene having a controlled long-chain-branch index.Type: GrantFiled: March 29, 2001Date of Patent: December 16, 2003Assignee: Equistar Chemicals, LPInventors: Shaotian Wang, Jean A. Merrick-Mack
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Publication number: 20030225224Abstract: A polymer includes at least propylene as a first monomeric component, 1-pentene as a second monomeric component, and, as a third monomeric component, a third olefin. The third olefin has fewer than 5 carbon atoms, is linear and is not propylene, or has 5 carbon atoms and is branched, or has more than 5 carbon atoms and is linear or branched.Type: ApplicationFiled: May 28, 2002Publication date: December 4, 2003Applicant: SASOL TECHNOLOGY (PROPRIETARY) LIMITEDInventors: Ioan Tincul, Dawid Johannes Joubert, Udo Maximilian Wahner, Sarel Petrus Jacobus Smith, Pieter Willem Van Zyl
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Patent number: 6657034Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide supported titanium-containing catalyst systems, inorganic oxide supported organo-zirconium catalyst systems and inorganic oxide supported organo-hafnium catalyst systems.Type: GrantFiled: September 26, 2001Date of Patent: December 2, 2003Assignee: Phillips Petroleum CompanyInventors: Joel L. Martin, Joseph J. Bergmeister, Eric T. Hsieh, Max P. McDaniel, Elizabeth A. Benham, Steven J. Secora
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Publication number: 20030216249Abstract: A catalyst composition for preparing olefin polymers. The catalyst composition includes a metallocene compound and an activating cocatalyst. In the metallocene compound, two cyclopentadienyl groups are bridged by X (carbon, silicon, germanium or tin) in a ring structure. The bite angle &thgr; formed by the two cyclopentadienyl rings and X is equal to or greater than 100 degrees. The obtained olefin polymer has high cycloolefin conversion and a high glass transition temperature. In addition, the catalyst composition can still maintain relatively high activity at high temperature reaction conditions.Type: ApplicationFiled: June 12, 2003Publication date: November 20, 2003Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jing-Cherng Tsai, Ming-Yuan Wu, Tung-Ying Hsieh, Yuh-Yuan Wei, Chao-Ying Yu
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Publication number: 20030216530Abstract: A catalyst composition includes: A) a solid catalyst precursor containing a metallocene compound, a magnesium compound and a particulate polymeric material; and B) a cocatalyst containing aluminum compound. The catalyst is prepared by combining metallocene compound, magnesium compound and particles of polymeric material to form a catalyst precursor; and activating the catalyst precursor with alkylaluminums and/or aluminoxanes. Homopolymeric or copolymeric polyolefins are produced by contacting olefins or olefins and alpha-olefins with the catalyst composition.Type: ApplicationFiled: May 27, 2003Publication date: November 20, 2003Applicant: Saudi Basic Industries CorporationInventors: Akhlaq Moman, Orass Hamed, Atieh Abu-Raqabah
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Patent number: 6649709Abstract: A continuous vapor-phase fluidized-bed process for the preparation of ethylene homopolymers and copolymers having a density of from 0.87 to 0.97 g/cm3 in which ethylene or mixtures of ethylene and C3-C8 a-monoolefins are (co)polymerized in the presence of a supported chromium catalyst in the polymerization zone of a vapor-phase fluidized-bed reactor under pressures ranging from 1 to 100 bar and at temperatures ranging from 30° to 125° C.Type: GrantFiled: May 31, 2000Date of Patent: November 18, 2003Assignee: Basell Polyolefine GmbHInventors: Peter Bauer, Armin Lange, Rainer Karer, Philipp Rosendorfer, Manfred Hecker, Günther Schweier, Wolfgang Micklitz, Kaspar Evertz, Hans-Jacob Feindt
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Publication number: 20030212224Abstract: The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b1) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl and a free radical initiator or b2) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ether. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, the (co)polymers obtainable by this process and the use of multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyls in combination with a free radical initiator, or a multi-functional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ethers for controlled polymerization.Type: ApplicationFiled: April 3, 2003Publication date: November 13, 2003Inventors: Wiebke Wunderlich, Rudolf Pfaendner, Raymond Seltzer, James Peter Galbo
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Publication number: 20030212221Abstract: A catalyst composition for preparing olefin polymers. The catalyst composition includes a metallocene compound and an activating cocatalyst. In the metallocene compound, two cyclopentadienyl groups are bridged by X (carbon, silicon, germanium or tin) in a ring structure. The bite angle 0 formed by the two cyclopentadienyl rings and X is equal to or greater than 100 degrees. The obtained olefin polymer has high cycloolefin conversion and a high glass transition temperature. In addition, the catalyst composition can still maintain relatively high activity at high temperature reaction conditions.Type: ApplicationFiled: June 12, 2003Publication date: November 13, 2003Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jing-Cherng Tsai, Ming-Yuan Wu, Tung-Ying Hsieh, Yuh-Yuan Wei, Chao-Ying Yu
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Publication number: 20030212219Abstract: A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta type catalyst in the presence of a specified compound that results in the production of polymeric products having a narrower molecular weight distribution. Also provide is a process for narrowing the molecular weight distribution of a polyolefin comprising contacting an olefin, a Ziegler-Natta catalyst and a compound specified herein. Further provided are novel polyethylenes, and films and articles produced therefrom.Type: ApplicationFiled: June 19, 2003Publication date: November 13, 2003Inventors: Randal Ray Ford, Richard Kingsley Stuart
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Patent number: 6646074Abstract: A process for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a Ziegler-Nata type catalyst wherein the polymerisation is performed in the presence of a process aid additive selected from at least one of (1) a polysulphone copolymer; (2) a polymeric polyamine or (3) an oil-soluble sulphonic acid.Type: GrantFiled: March 8, 2002Date of Patent: November 11, 2003Assignee: BP Chemicals LimitedInventors: Marc Herzog, Jean-Pierre Isnard, Claudine Viviane Lalanne-Magne, Myung Je Shin
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Publication number: 20030208024Abstract: Long-chain, branched, propylene-based polymers, of which the melt index and the molecular weight distribution and the melt tension and the limiting viscosity both satisfy specific requirements, have good physical properties that are comparable to or better than those of conventional propylene-based polymers. They have good melt workability and are favorable to large-size blow molding and extrusion foaming. They are favorably used as miscibility improvers for propylene homopolymers and propylene-based copolymers.Type: ApplicationFiled: April 17, 2003Publication date: November 6, 2003Inventors: Tomio Tatsumi, Shuji Machida, Mitsugu Kanzawa, Yutaka Minami, Yasuhiro Goto, Masato Kijima
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Patent number: 6642323Abstract: The present invention concerns a process for producing homogeneous polyethylene compositions and processes for making high density, medium density and low density films therefrom. The process comprises carrying out the polymerization in the presence of an ethylene-polymerizing catalyst system in a multistage reaction sequence of successive polymerization stages, at least one of which is a loop polymerization stage, and at least one of which is a gas phase polymerization stage. According to the invention, said loop polymerization stage is operated using a diluent selected from the group of linear and branched C4-C6 hydrocarbons and/or mixtures thereof. The reactor sequence is operated with different amounts of hydrogen and comonomers to produce a high molecular weight portion in one of the polymerization stages and a low molecular weight portion in another, so as to provide bimodal polyethylene composition with a low molecular weight part having an MFR2 of 250 g/10 min or more.Type: GrantFiled: November 8, 2000Date of Patent: November 4, 2003Assignee: Borealis Technology OyInventors: Ole Jan Myhre, Bjarne Jansen, Auli Nummila-Pakarinen, Jari Äärilä
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Patent number: 6642326Abstract: A process for the polymerization of olefins is disclosed. A boraaryl catalyst precursor and an activator are used in the presence of a silane modifier. A low level of silane modifier enhances the activity of the catalyst.Type: GrantFiled: May 3, 2002Date of Patent: November 4, 2003Assignee: Equistar Chemicals, LPInventors: Karen E. Meyer, Mark K. Reinking
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Patent number: 6639030Abstract: A process for production of an olefin polymer is provided which comprises polymerization of ethylene and/or &agr;-olefin of three of more carbons at a polymerization temperature of not lower than 120° C. with a catalyst comprising a specific metallocene compound having a substituted fluorenyl group, and a compound which reacts with the metallocene compound to form a cationic metallocene compound. The olefin polymer or copolymer produced by the process has narrow composition distribution, narrow molecular weight distribution, and a high molecular weight.Type: GrantFiled: October 19, 1995Date of Patent: October 28, 2003Assignee: Tosoh CorporationInventors: Makoto Sone, Saiki Hasegawa, Satoru Yamada, Akihiro Yano
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Publication number: 20030199648Abstract: The present invention is directed to homo-polymers and copolymers of mono-1-olefins, a method of making such polymers, and uses of such polymers. Polymers of the present invention are formed by contacting at least one mono-1-olefin having from 2 to about 20 carbon atoms per molecule and at least one mono-1-olefin co-monomer having from 2 to about 10 carbon atoms per molecule in a reaction zone under polymerization conditions in the presence of a hydrocarbon diluent, a catalyst system, and a cocatalyst. The catalyst system of the present invention comprises a chromium source on an aluminophosphate support which has a phosphorous to aluminum mole ratio of less than about 0.3. Further, the catalyst system is treated with less than about 7 weight percent fluoride based on the weight of the support and is calcined. Cocatalyst are selected from trialkylboron compounds, triarylboron compounds, alkylaluminum compounds, and combinations thereof.Type: ApplicationFiled: February 24, 2003Publication date: October 23, 2003Inventors: Max P. McDaniel, Elizabeth A. Benham, Al R. Wolfe, Paul J. DesLauriers, Pamela L. Meager, William R. Coutant, David C. Rohlfing, Steven J. Secora
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Patent number: 6635779Abstract: A class of metallocene compounds is disclosed having general formula (I) wherein Y is a moiety of formula (II) wherein A, B, and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Elements (new IUPAC version), with the exclusion of nitrogen and oxygen; R1, R2, R3, R4 and R5 are hydrogen or hydrocarbon groups, Z is selected from a moiety of formula (II) as described above and from a moiety of formula (III) wherein R6, R7, R8 and R9, are hydrogen or hydrocarbon groups; L is a divalent bridging group; M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements (new IUPAC version), X, same or different, is hydrogen, a halogen, a R10, OR10, OSO2CF3, OCOR10, SR10, NR102 or PR102 group, wherein the substituents R10 are hydrogen or alkyl groups; p is an integer of from 1 to 3, being equal to the oxidation state of the metal M minus 2.Type: GrantFiled: November 20, 2001Date of Patent: October 21, 2003Assignee: Basell Technology Company bvInventors: John A. Ewen, Michael J. Elder, Robert L. Jones
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Publication number: 20030195320Abstract: Elastic ethylene polymers are disclosed which have, processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear ethylene polymer and a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a traditional linear ethylene polymer at about the same I2 and Mw/Mn. The novel polymers can also have from about 0.01 to about 3 long chain branches/1000 total carbons and have higher low/zero shear viscosity and lower high shear viscosity than comparative liner ethylene polymers. T novel polymers can also be characterized as having a melt flow ratio, I10/I2,≧5.63, a molecular weight distribution, Mw/Mn, defined by the equation: Mw/Mn≦(I10/I2)−4.Type: ApplicationFiled: January 30, 2003Publication date: October 16, 2003Inventors: Shih-Yaw Lai, John R. Wilson, George W. Knight, James C. Stevens
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Publication number: 20030194575Abstract: Films with excellent machine direction (MD) tear properties comprise at least one layer made from a polymer comprising:Type: ApplicationFiled: November 5, 2002Publication date: October 16, 2003Inventors: Li-Min Tau, Pak-Wing S. Chum, Seema Karande, Clive Bosnyak
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Patent number: 6632896Abstract: Ths invention provides a process for the preparation of a polyethylene, in particular an HDPE suitable for blow moulding of HIC, which comprises polymerizing ethylene and, optionally an ethylenically unsaturated comonomer copolymerizable therewith, in the presence of a catalyst comprising a first silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 350 m2/g and a chromium content of 0.1 to 1.0% by weight and a second silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 450 m2/g and a chromium content of 0.1 to 1.0% by weight, wherein the silica support of said first catalyst also comprises alumina and the silica support of said second catalyst also comprises titanium, and preferably a co-catalyst.Type: GrantFiled: November 29, 1999Date of Patent: October 14, 2003Assignee: Borealis Technology OyInventors: Vidar Almquist, Paul Allemeersch, Roger Goris, Ann Kristin Lindahl
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Patent number: 6632899Abstract: An active non-metallocene pre-catalyst featuring a diamine diphenolate complex and a corresponding method for catalytic polymerization, in general, and, tactic catalytic polymerization, in particular, of alpha-olefin monomers using the disclosed pre-catalyst.Type: GrantFiled: June 25, 2002Date of Patent: October 14, 2003Assignee: Ramot at Tel Aviv University Ltd.Inventors: Moshe Kol, Edit Y. Tshuva
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Publication number: 20030191251Abstract: Multimodal polyolefin polymers may be prepared in series-connected polymerization reactors where a prior reactor is a slurry reactor employing light solvent as the slurry medium and hydrogen to limit polymer molecular weight, the polymer product from the prior reactor being substantially freed of hydrogen prior to entry into a subsequent polymerization reactor operating at low hydrogen pressure to produce a high molecular weight olefin. The economics and operating performance of such a series slurry reactor polyethylene process can be significantly improved through the use of an intermediate slurry transfer system and hydrogen removal apparatus that employs flash drums in series in conjunction with a warm recycle solvent slurry diluent.Type: ApplicationFiled: April 4, 2002Publication date: October 9, 2003Applicant: Equistar Chemicals L.P.Inventor: Patrick J. McGrath
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Patent number: 6630546Abstract: Use of a catalyst system comprising a metallocene catalyst component of general formula R″(CpRm) (Cp′R′n)MQ2 supported on an inert support in the slurry phase production of linear low density polyolefin, wherein Cp is a cyclopentadienyl moiety, Cp′ is a substituted or unsubstituted fluorenyl ring; R″ is a structural bridge imparting stereorigidity to the component; each R is independently hydrogen or hydrocarbyl having 1 to 20 carbon atoms in which 0≦m≦4; each R′ is independently hydrocarbyl having 1 to 20 carbon atoms in which 0≦n≦B; M is a Group IVB transition metal or vanadium; and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen; the metallocene having a centroid-M-centroid angle in the range 105° to 125°.Type: GrantFiled: March 22, 2002Date of Patent: October 7, 2003Assignee: Fina Research, S.A.Inventors: Abbas Razavi, Liliane Peters
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Patent number: 6630553Abstract: A process for preparing a butyl polymer, the process comprising contacting a C4 to C8 monoolefin monomer with a C4 to C14 multiolefin monomer at a temperature in the range of from about −100° C. to about +50° C. in the presence of a diluent and a catalyst mixture comprising a monoalkylaluminum dihalide and an aluminoxane.Type: GrantFiled: December 19, 2001Date of Patent: October 7, 2003Assignee: Bayer Inc.Inventor: Adam Gronowski