With Group Ivb Transition Metal Compound (ti, Zr, Hf) Patents (Class 526/158)
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Publication number: 20030216525Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer.Type: ApplicationFiled: June 17, 2003Publication date: November 20, 2003Inventors: Max P. McDaniel, Elizabeth A. Benham
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Patent number: 6646073Abstract: A novel continuous gas phase polymerization process for producing polyethylene and interpolymers of ethylene and at least one other olefin is provided wherein a saturated halogenated hydrocarbon is used in a specified amount such that the activity of the titanium containing Ziegler-Natta catalyst is increased.Type: GrantFiled: July 24, 2001Date of Patent: November 11, 2003Assignee: Eastman Chemical CompanyInventors: Don Kent Farrer, Kenneth Alan Dooley, Glenn Edward Moore, Larry Allen Noble
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Patent number: 6646072Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: GrantFiled: January 23, 2002Date of Patent: November 11, 2003Assignee: Equistar Chemicals, LPInventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6639038Abstract: A first crystalline polypropylene of the present invention satisfies the relationships of the following formulae (1) and (2): &agr;≦−0.42×ln(Mp)+7.3 (1),and Tm>1.85×ln(Mp)+144.5 (2), wherein &agr; is a 0° C. soluble content (% by weight) as measured through programmed-temperature fractionation, Mp is a peak molecular weight in a molecular weight distribution curve as measured through gel permeation chromatography, and Tm is a melting point (° C.) as measured through differential scanning calorimetry. A second crystalline polypropylene of the present invention satisfies the relationship given in the following formula (3): &agr;≦1.11[&eegr;]−0.42+1.40 (3) wherein &agr; is the same as above and [&eegr;] an intrinsic viscosity (dl/g) as measured in a tetralin solvent at 135° C.Type: GrantFiled: September 27, 2001Date of Patent: October 28, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Itaru Kuramoto, Yutaka Obata, Tsuyoshi Ota, Toshio Isozaki, Junichi Amano, Takashi Sumitomo
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Publication number: 20030199647Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds, especially for the preparation of butyl rubbers, as well as isoolefin copolymers composed of isobutene, isoprene and, optionally, further monomers.Type: ApplicationFiled: March 21, 2003Publication date: October 23, 2003Inventors: Gerhard Langstein, Martin Bohnenpoll
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Patent number: 6635726Abstract: A novel continuous gas phase polymerization process for producing polyethylene and interpolymers of ethylene and at least one other olefin is provided wherein chloroform is used in a specified amount such that the activity of the titanium containing Ziegler-Natta catalyst is increased.Type: GrantFiled: July 24, 2001Date of Patent: October 21, 2003Assignee: Eastman Chemical CompanyInventors: Don Kent Farrer, Kenneth Alan Dooley, Glenn Edward Moore, Larry Allen Noble
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Patent number: 6632900Abstract: An olefin polymerization catalyst obtained by contacting a specific transition metal compound(A), an organoaluminumoxy compound (B) soluble in an aromatic solvent and water (C), and a process for producing an olefin polymer with said catalyst.Type: GrantFiled: August 7, 2001Date of Patent: October 14, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Masayuki Fujita, Tatsuya Miyatake
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Patent number: 6627707Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer.Type: GrantFiled: August 7, 2001Date of Patent: September 30, 2003Inventors: Max P. McDaniel, Elizabeth A. Benham
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Publication number: 20030139545Abstract: A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.Type: ApplicationFiled: January 23, 2002Publication date: July 24, 2003Inventors: Douglas D. Klendworth, Mark K. Reinking
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Patent number: 6593267Abstract: The present invention relates to a composition of a carboxylate metal salt in combination with a heated polymerization catalyst to improve the flowability and operability of the catalyst. The invention also relates to methods for preparing the catalyst composition and to its use in a polymerization process.Type: GrantFiled: October 31, 2001Date of Patent: July 15, 2003Assignee: Univation Technologies, LLCInventors: Chi-I Kuo, Agapios K. Agapiou, Steven K. Ackerman, Simon X. Zhang
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Patent number: 6586543Abstract: The present invention provides a process for preparing a substantially amorphous poly-&agr;-olefin, which includes: a) preforming a solid catalyst and, optionally, a first amount of a trialkylaluminum cocatalyst, by contacting the catalyst and optionally the cocatalyst with at least one selected from the group including oxygen and a compound which includes active oxygen, to form a preformed catalyst, wherein the solid catalyst includes magnesium, aluminum and titanium, and wherein said trialkylaluminum cocatalyst includes 1 to 9 carbon atoms in each alkyl group; b) contacting the preformed catalyst with a second amount of the cocatalyst, wherein a molar ratio of trialkylaluminum to the titanium ranges from 40:1 to 700:1, to form a catalyst mixture; c) polymerizing, in the liquid phase, with the catalyst mixture, an olefin or an olefin mixture at a temperature between 30 and 160° C., to produce the poly-&agr;-olefin.Type: GrantFiled: September 1, 2000Date of Patent: July 1, 2003Assignee: Degussa AGInventors: Hans Guenther Wey, Norbert Schlueter
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Patent number: 6566464Abstract: There are disclosed a process for producing a solid catalyst component and a catalyst for &agr;-olefin polymerization, and a process for producing an &agr;-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of: (1) reducing a specific titanium compound with an organomagnesium compound in the presence of an organosilicon compound having an Si—O bond (and an ester compound), thereby obtaining a solid product, and (2) contacting the solid product with at least one member selected from the group consisting of an electron donor compound (E1) and an organic acid halide, and a compound having a Ti-halogen bond, thereby obtaining the solid catalyst component.Type: GrantFiled: February 2, 2001Date of Patent: May 20, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuki Fujiwara, Makoto Satoh
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Patent number: 6562916Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds, especially for the preparation of butyl rubbers, as well as isoolefin copolymers composed of isobutene, isoprene and, optionally, further monomers.Type: GrantFiled: August 27, 2001Date of Patent: May 13, 2003Assignee: Bayer AktiengesellschaftInventors: Gerhard Langstein, Martin Bohnenpoll
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Patent number: 6559089Abstract: Provided is a metallocene catalyst component for use if preparing isotactic polyolefins, which component has the general formula (I): R″ (CpR1R2R3)(Cp′R′n) MQ2 wherein Cp is a substituted cyclopentadienyl ring; Cp′ is substituted or unsubstituted fluorenyl ring; R″ is a structural bridge imparting stereorigidity to the component; R1 is a substituent on the cyclopentadienyl ring which is distal to the bridge, which distal substituent comprises a bulky group of the formula XR*3 in which X is chosen from Group IVA, and each R* is the same or different and chosen from hydrogen or hydrocarbyl of from 1 to 20 carbon atoms, R2 is substituent on the cyclopentadienyl ring which is proximal to the bridge and positioned non-vincinal to the distal substituent, and is of the formula YR#3, in which Y is chosen from Group IVA, and each R# is the same or different and chosen from hydrogen or hydrocarbyl of 1 to 7 carbon atoms, R3 is a substituent on the cyclopentadienyl ring which is proType: GrantFiled: February 15, 2000Date of Patent: May 6, 2003Assignee: Fina Technology, Inc.Inventors: Abbas Razavi, Vincenzo Bellia
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Patent number: 6559250Abstract: The present invention relates to a method of homo- or co-polymerization of &agr;-olefin by means of using a catalyst system which comprises the following components: (1) a solid complex titanium catalyst produced by means of a production method comprising the following steps: (a) preparing a magnesium compound solution by dissolving a magnesium halide compound and a compound of Group IIIA of the Periodical Table in a solvent of mixture of cyclic ester, one or more types of alcohol, a phosphorus compound, and an organic silane; (b) precipitating the solid particles by reacting said magnesium compound solution with a transitional metal compound, a silicon compound, a tin compound, or the mixture thereof; and (c) reacting said precipitated solid particles with a titanium compound and electron donors; (2) an organometallic compound of metal of Group IIIA of the Periodical Table; and (3) external electron donors comprising three or more types of organo-silicon compounds, wherein the melt flow rates of the homopolyType: GrantFiled: May 30, 2001Date of Patent: May 6, 2003Assignee: Samsung General Chemicals Co., Ltd.Inventors: Ki-Su Ro, Il-Seop Kim, Chun-Byung Yang, Moon-Young Shin
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Patent number: 6559249Abstract: The present invention provides a catalyst for producing an ultra high molecular weight polyethylene and also a method for preparation of an ultra high molecular weight polyethylene with the use of said catalyst. The catalyst of the present invention is prepared by a process comprising: (i) producing a magnesium compound solution by contact-reacting a magnesium compound and an aluminum or boron compound with alcohol; (ii) contact-reacting the said solution with an ester compound containing at least one hydroxy group and a silicon compound containing an alkoxy group; and (iii) producing of a solid titanium catalyst by adding a mixture of a titanium compound and a silicon compound thereto. The catalyst prepared by the present invention has excellent catalytic activity, and it helps to produce an ultra-high molecular weight polyethylene with large bulk density and narrow particle distribution without too large and minute particles.Type: GrantFiled: March 6, 2001Date of Patent: May 6, 2003Assignee: Samsung General Chemicals Co. Ltd.Inventors: Chun-Byoung Yang, Ho-Sik Chang, Weon Lee
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Patent number: 6559253Abstract: The invention is directed to olefin polymerization processes using bridged hafnocene catalyst complexes comprising highly substituted noncoordinating anions that are surprisingly stable under high temperature olefin polymerization processes such that olefin copolymers having significant amount of incorporated comonomer can be prepared with high molecular weights. More specifically, the invention is a polymerization process for ethylene copolymers having a melt index of about 0.87 to about 0.930 comprising contacting, under homogeneous polymerization conditions at a reaction temperature at or above 140° C. to 225° C.Type: GrantFiled: July 10, 2001Date of Patent: May 6, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Donna J. Crowther, Bernard J. Folie, John F. Walzer, Jr., Rinaldo S. Schiffino
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Patent number: 6555633Abstract: A catalyst which is able to express a high oligomerizing activity of ethylene and a method for the production of &agr;-olefin where ethylene is oligomerized using said catalyst are provided. The present invention relates to a catalyst for the production of &agr;-olefin obtained by contacting (a) clay, clay mineral or ion-exchange layer compound with (b-1) a transition metal complex of Groups 4 to 6 of the Periodic Table and also relates to a method for the production of &agr;-olefin by oligomerization of ethylene using said catalyst. The present invention further relates to a catalyst for the production of &agr;-olefin obtained by contacting (a) clay, clay mineral or ion-exchange layer compound with (b-2) a transition metal complex of Groups 8 to 10 of the Periodic Table and also relates to a method of the production of &agr;-olefin by oligomerization of ethylene using said catalyst.Type: GrantFiled: September 11, 2000Date of Patent: April 29, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shinji Tanaka, Yasushi Shiraki, Takao Tamura, Masahiko Kuramoto, Haruhito Sato, Masami Watanabe
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Patent number: 6552138Abstract: A resin which is an ethylene/&agr;-olefin copolymer comprising ethylene and an &agr;-olefin having 3 to 12 carbon atoms exhibiting particular physical properties including a narrow molecular weight distribution, and which is suitable for flexible sealed containers showing excellent flexibility, unstickiness and excellent slip properties, and flexible sealed containers therefrom.Type: GrantFiled: December 15, 2000Date of Patent: April 22, 2003Assignee: Mitsui Chemicals, Inc.Inventor: Tomohiko Kimura
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Patent number: 6552136Abstract: Provided are a catalyst for olefin polymer production, which contains an organosilicon compound having a specific structure and with which olefin polymers produced have increased stereospecificity and increased melt fluidity; and a method for producing such olefin polymers.Type: GrantFiled: February 1, 2001Date of Patent: April 22, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Tsuyoshi Ota, Takanori Sadashima, Yasunori Kadoi, Toshio Isozaki, Kiyokazu Katayama
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Publication number: 20030069372Abstract: 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: October 9, 2001Publication date: April 10, 2003Applicant: Formosa Plastics Corporation, U.S.A.Inventors: Bing Lu, Honglan Lu, Chih-Jian Chen
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Patent number: 6545106Abstract: Process for the polymerization of olefins, according to which at least one olefin is placed in contact with a catalytic system comprising: a) a solid catalytic complex based on magnesium, transition metal and halogen, the said catalytic complex being prepared by reacting, in a first step, at least one magnesium compound with at least one compound of a transition metal from group IVB or VB of the Periodic Table, until a liquid complex is obtained, and, in a subsequent step, by precipitating the said liquid complex using a halogen-containing organoaluminium compound of general formula AlRnX3-n in which R is a hydrocarbon radical, X is a halogen and n is less than 3, in order to collect a solid catalytic complex, and b) an organometallic compound of a metal from groups IA, IIA, IIB, IIIA and IVA of the Periodic Table, c) at least one electron donor used after the first step in the preparation of the solid catalytic complex leading to the production of a liquid complex.Type: GrantFiled: May 6, 1997Date of Patent: April 8, 2003Assignee: Solvay (Societe Anonyme)Inventor: Jiang Bian
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Patent number: 6541582Abstract: A solid catalyst component for the polymerization of olefins CH2═CHR, in which R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, the solid catalyst component including Mg, Ti, halogen and an electron donor selected from &bgr;-substituted glutarates other than diisopropyl &bgr;-methyl glutarate and which are not alpha-substituted. The catalyst component, when used in the polymerization of olefins, and in particular polypropylene, is capable of providing polymers in high yield and with a high isotactic index expressed in terms of high xylene insolubility.Type: GrantFiled: November 14, 2000Date of Patent: April 1, 2003Assignee: Basell Poliolefine Italia S.p.A.Inventors: Giampiero Morini, Giulio Balbontin
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Patent number: 6534433Abstract: A process is provided for preparing a catalyst support for polymerizing &agr;-olefins comprising the steps of: (i) reacting, in the presence of a first electron donor, a chlorine-containing organic compound and a prior mixture of an alkylmagnesien and an aluminoxane and/or aluminosiloxane and/or alkylaluminum and, optionally, a second electron donor; and (ii) activating a product from step (i) in suspension in an inert liquid by means of an activation electron donor, together with the support thus obtained, a catalyst for polymerizing &agr;-olefins, comprising this catalyst support and a group IV transition metal halide, and a process for polymerizing &agr;-olefins, particularly propylene, comprising contacting the &agr;-olefin with the catalyst.Type: GrantFiled: July 28, 2000Date of Patent: March 18, 2003Assignee: AtofinaInventors: Thierry Saudemont, Jean Malinge, Jean-Loup LaCombe, Daniel Cochard, Henri Violle
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Publication number: 20030050185Abstract: Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR)n−yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g and containing from 0.5 to 100 g of polymer per g of solid catalyst component, the pre-polymer being obtained by (co)polymerizing an olefin or a diolefin in the presence of a catalyst comprising a Ti, V, Zr of Hf compound supported on an Mg dihalide having a mean crystallite dimension lower than 30 nm.Type: ApplicationFiled: July 24, 2002Publication date: March 13, 2003Inventors: Licio Zambon, Mario Sacchetti, Gianni Vitale
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Patent number: 6495639Abstract: Provided are a solid catalyst component for olefin polymerization and a catalyst comprising the component for olefin polymerization, in which the electron donor is free from the problem of lacking in safety and sanitation, and is inexpensive and easy to produce, and which exhibit high activity in producing olefin polymers with high stereospecificity, and also a method for producing olefin polymers in the presence of the catalyst. The solid catalyst component comprises titanium, magnesium and an electron donor compound of formula (I): wherein R1 and R2 each represent a linear or branched hydrocarbon residue having from 1 to 20 carbon atoms; R3 represents an alicyclic hydrocarbon residue having from 3 to 20 carbon atoms; and n represents an integer of from 1 to 10. The solid catalyst component is combined with an organic aluminium compound to prepare a catalyst, which is used in producing olefin polymers.Type: GrantFiled: September 19, 2000Date of Patent: December 17, 2002Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasunori Kadoi, Tsuyoshi Ota, Toshio Isozaki, Kiyokazu Katayama, Takanori Sadashima
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Patent number: 6489427Abstract: Polyethylenes are prepared having a density in the range 900-980 kg/m3 and a weight average molecular weight ≧375,000 characterized by a fracture toughness at −40° C. >20 kJ/m2 and a dynamic viscosity of <3000 Pa.s at 100 rad/sec. The polymers also having a die swell of 10-80% and show a desirable combination of physical and processing properties. The polymers are prepared by the use of catalysts comprising a metallocene component and a Ziegler component.Type: GrantFiled: September 25, 2000Date of Patent: December 3, 2002Assignee: BP Chemicals LimitedInventors: Edward Quentin Clutton, Philip Stephen Hope
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Patent number: 6469112Abstract: One aspect of the present invention relates to a catalyst system for use in olefinic polymerization, containing a solid titanium catalyst component; an organoaluminum compound having at least one aluminum-carbon bond; and an organosilicon compound comprising a (cycloalkyl)methyl group. Another aspect of the present invention relates to a method of making a catalyst for use in olefinic polymerization, involving the steps of reacting a Grignard reagent having a (cycloalkyl)methyl group with an orthosilicate to provide an organosilicon compound having a (cycloalkyl)methyl moiety; and combining the organosilicon compound with an organoaluminum compound having at least one aluminum-carbon bond and a solid titanium catalyst component to form the catalyst.Type: GrantFiled: August 15, 2001Date of Patent: October 22, 2002Assignee: Engelhard CorporationInventors: Chung-Ping Cheng, Michael D. Spencer
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Patent number: 6458910Abstract: Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tube so cooled, to maintain the tube diameter identical to that of the annular die and expanding the tube or bubble to attenuate the walls thereof by introducing a gas to the interior of the tube or bubble. The resulting films are characterized by superior impact strength and MD tear resistance.Type: GrantFiled: April 15, 1996Date of Patent: October 1, 2002Assignee: ExxonMobil Oil CorporationInventors: Vaseem Firdaus, Pradeep P. Shirodkar
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Publication number: 20020137860Abstract: The present invention relates to a process for the preparation of random copolymers of propylene with c2-c10 &agr;-olefins, carried out in the presence of a catalyst comprising:Type: ApplicationFiled: January 4, 2002Publication date: September 26, 2002Applicant: BASELL NORTH AMERICA INC.Inventors: Gianni Collina, Giampiero Morini
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Patent number: 6451726Abstract: Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR)n−yXy, where n is the valence of titanium and y is a number between 1 and n, with a pre-polymer having a porosity higher than 0.3 cc/g and containing from 0.5 to 100 g of polymer per g of solid catalyst component, the pre-polymer being obtained by (co)polymerizing an olefin or a diolefin in the presence of a catalyst comprising a Ti, V, Zr of Hf compound supported on an Mg dihalide having a mean crystallite dimension lower than 30 nm.Type: GrantFiled: March 30, 2000Date of Patent: September 17, 2002Assignee: Basell Poliolefine Italia S.p.A.Inventors: Licio Zambon, Mario Sacchetti, Gianni Vitale
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Patent number: 6437063Abstract: The present invention concerns a process for producing a propylene polymer nucleated with a polymeric nucleating agent containing vinyl compound units. The method comprises modifying a catalyst by polymerizing a vinyl compound in the presence of said catalyst in a medium, which does not essentially dissolve the polymerized vinyl compound, and by continuing the polymerization of the vinyl compound until the concentration of unreacted vinyl compounds is less than about 0.5 wt-%. The thus obtained modified catalyst composition is used for polymerizing propylene optionally together with comonomers to produce in the presence of said modified catalyst composition. Modification of the catalyst according to the present invention will reduce production costs and provide highly reliable catalyst activity.Type: GrantFiled: June 23, 2000Date of Patent: August 20, 2002Assignee: Borealis Technology OyInventors: Amir Karbasi, Pauli Leskinen, Pirjo J{umlaut over (aa)}skeläinen, Bo Malm, Päivi Pitkänen, Mika Härkönen, John Haugen
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Patent number: 6426394Abstract: Methods of polymerizing olefins in the gas phase using unsupported catalyst compositions are disclosed. At least one olefin monomer is polymerized in a gas phase reactor in the presence of an unsupported liquid catalyst composition whereby the method reduces reactor fouling by maintaining the partial pressure of the primary olefin monomer that is polymerized below about 240 psi. in the reactor. The invention is particularly useful for, but is not limited to polymerizing propylene or copolymerizing propylene with olefins having two or more carbon atoms. The method described herein produces a polymer product having controlled, uniform particle size, narrow molecular weight distribution, high bulk density and stereoregularity, and prevents and/or inhibits reactor fouling during catalyst delivery and during polymerization.Type: GrantFiled: December 10, 1999Date of Patent: July 30, 2002Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Kersten Anne Erickson, Jody M. Moffett
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Patent number: 6420500Abstract: A novel supported catalyst component useful for &agr;-olefin polymerization and a method of polymerizing an &agr;-olefin using the same. The catalyst component is characterized by being prepared by contacting a complex represented by general formula (I) wherein R1 and R2 are the same or different and each represents a C1-6 linear or branched alkyl, a C1-3 haloalkyl, or optionally substituted phenyl; and X represents a halogeno with magnesium compound.Type: GrantFiled: December 31, 1998Date of Patent: July 16, 2002Assignee: Tosoh Akzo CorporationInventors: Kazuo Soga, Toshiya Uozumi, Eiichi Kaji
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Patent number: 6417301Abstract: There is described a process utilizing Ziegler-Natta catalysts for producing ethylene/olefin interpolymers which, for a given melt index and density, have a reduced melting peak temperature (Tm). The process involves contacting ethylene and at least one other olefin under polymerization conditions with a Ziegler-Natta catalyst and at least one modifier comprising at least one element from Group 15 and/or Group 16 in amounts sufficient to reduce the melting peak temperature of the ethylene/olefin interpolymer. Also described herein are novel ethylene/olefin interpolymers resulting from the process.Type: GrantFiled: August 31, 1999Date of Patent: July 9, 2002Assignee: Eastman Chemical CompanyInventors: Randal Ray Ford, Jeffrey James Vanderbilt, Darryl Stephen Williams
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Patent number: 6410662Abstract: Disclosed is a process for producing olefin polymers or copolymers which can freely regulates the molecular weight of the polymers or copolymers as well as novel olefin polymers or copolymers excellent in rigidity, heat-resisting property and transparency, moldings and compositions thereof which find a wide variety of applications in versatile industrial parts including containers, films, sheets, filaments or fibers, featured by (1) a process for producing olefin polymers or copolymers by the aid of a catalyst comprised predominantly of the compounds: (A) a transition metal compound of the formula: Q(C5H4−mR1m)(C5H4−nR2n)MXY, (B) an aluminoxane, (C) a fine particulate carrier, and (D) an organoaluminum compound; (2) olefin polymers or copolymers characterized by (a) a specific ratio of isotactic pentad, (b) 2,1- and 1.Type: GrantFiled: February 11, 2000Date of Patent: June 25, 2002Assignee: Chisso CorporationInventors: Tsutomu Ushioda, Jun Saito, Mototake Tsutsui, Yoshitoyo Yasuda, Hiroyuki Fujita, Toshihiro Uwai, Yoshiyuki Ohgi, Minoru Adachi, Yoshitaka Morimoto, Taketo Hirose, Youichi Kugimiya, Masahiko Taniguchi, Hitoshi Kuramochi
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Patent number: 6410663Abstract: The present invention provides a catalyst system that exhibits unexpected control of desired properties in copolymer product. The catalyst system includes a conventional supported Ziegler-Natta catalyst in combination with an electron donor described by the formula: wherein R1 is a linear alkyl group attached to the silicon atom; R2 and R3 are alkyl or aryl groups and R4 is a linear alkyl attached to the silicon atom, R1 and R4 are the same or different. R1 and R4 are preferably linear carbon groups of 4-13 carbon atoms, more preferably 4-7 carbon atoms; most preferably R1 and R4 are the same and are n-butyl groups. The system exhibits good control over the melt flow index of the copolymer products.Type: GrantFiled: February 27, 2001Date of Patent: June 25, 2002Assignee: Fina Technology, Inc.Inventors: Edwar S. Shamshoum, David J. Rauscher, Theodore G. Harris
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Patent number: 6407185Abstract: Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI2 of 5 to 1000 g/10 min and a polymer of melt index MI5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 to 50,000 and the weight ratio of the two polymers being equal to (30 to 70):(70 to 30), according to which part of the ethylene, a catalyst derived from a transition metal having an intrinsic molecular weight distribution defined by an intrinsic Mw/Mn ratio less than or equal to 10 and a deactivation constant less than or equal to 0.5 h−1, and a cocatalyst are introduced into a first reactor, polymerization of the ethylene is carried out therein, a mixture comprising one of the polymers, the catalyst and the cocatalyst is drawn off from this reactor and the mixture and another part of the ethylene are introduced into a second reactor, which ethylene is polymerized to form the other polymer.Type: GrantFiled: April 14, 2000Date of Patent: June 18, 2002Assignee: Solvay (Societe Anonyme)Inventor: Michel Promel
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Publication number: 20020065189Abstract: A novel supported catalyst component useful for &agr;-olefin polymerization and a method of polymerizing an &agr;-olefin using the same. The catalyst component is characterized by being prepared by contacting a complex represented by general formula (I) wherein R1 and R2 are the same or different and each represents a C1-6 linear or branched alkyl, a C1-3 haloalkyl, or optionally substituted phenyl; and X represents a halogeno with magnesium compound.Type: ApplicationFiled: December 31, 1998Publication date: May 30, 2002Inventors: KAZUO SOGA, TOSHIYA UOZUMI, EIICHI KAJI
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Patent number: 6387839Abstract: The present invention provides a compound catalyst system useful for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, prepared by incorporating an organic alcohol as an electron-donor compound and an aluminoxane compound into the prior art compound catalyst systems, thereby promoting the activities of the two active centers, which leads to not only a large improvement in the activity of the catalyst system, but also the formation of polyethylenes and copolymers of ethylene having bimodal or broad molecular weight distributions, which in turn gives polymers having excellent processability and mechanical properties. A process for preparing the solid catalyst component used in the compound catalyst system according to the present invention and use of the compound catalyst system are also disclosed.Type: GrantFiled: December 28, 1999Date of Patent: May 14, 2002Assignees: China Petrochemical Corporation, Beijing Research Institute of Chemical Industry SinopecInventors: Maozhu Jin, Yuexiang Liu, Renqi Peng, Huibo Shen, Meizhen Yin, Zhaowen Ma, Changbing Xie, Yijing Sun, Baolan Zhu, Baoquan Xing
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Patent number: 6384163Abstract: A process for preparing a spherical polyethylene of ultra-high molecular weight. A process for preparing a spherical support for the polymerization of alpha-olefins from an ammonium dawsonite which is spray-dried and formed into spherical particles which are then calcined and impregnated with titanium to produce a spherical catalyst of good mechanical strength is described. Also described is the polymerization process which, in the presence of the spherical catalyst, yields polyolefin particles which preserve the spherical characteristics of the support, with low flow angle and good bulk density, as well as the product polyethylene obtained from the process.Type: GrantFiled: June 6, 1995Date of Patent: May 7, 2002Assignee: Petroleo Brasileiro S. A.-PetrobrasInventors: Jaime Correia da Silva, Cecilia Maria Ooelho de Figueiredo
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Patent number: 6365685Abstract: The present invention relates to a process for the preparation of random copolymers of propylene with c2-c10&agr;-olefins, carried out in the presence of a catalyst comprising: A) A solid component comprising a titanium compound supported on mgcl2 in active form and an electron-donor compound; b) An alkyl-al compound, and c) An electron-donor compound selected from the group of 1,3-diethers. The copolymers obtained using the said process show, for an equivalent content of &agr;-olefin, a lower content of xylene-soluble fractions when compared with the copolymers obtained with the catalysts of the prior art.Type: GrantFiled: October 6, 1999Date of Patent: April 2, 2002Assignee: Remall North AmericaInventors: Gianni Collina, Giampiero Morini
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Patent number: 6362124Abstract: There are provided (i) a catalyst component (C), (ii) an olefin polymerization catalyst, and (iii) a process for producing an olefin polymer. The catalyst being obtained by contacting a solid catalyst component (A), an organoaluminum compound (B) and the catalyst component (C) of an organosilicon compound represented by the following formula (1), wherein n is 1 or 2, R1 to and R6 are independently of one another a hydrogen or halogen atom or a hydrocarbon group, or may be bonded with one another to form a ring, R7 is a hydrocarbon group, and when n is 2, two R1s, R2s, R3s, R4s, R5s and R6s may be the same or different.Type: GrantFiled: February 15, 2000Date of Patent: March 26, 2002Assignee: Sumitomo Chemical Co., Ltd.Inventors: Hiroshi Kuribayashi, Makoto Satoh
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Publication number: 20020022706Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer.Type: ApplicationFiled: August 7, 2001Publication date: February 21, 2002Applicant: Phillips Petroleum CompanyInventors: Max P. McDaniel, Elizabeth A. Benham
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Patent number: 6337377Abstract: A process for producing an olefin polymer using a catalyst in which (A) is a solid catalyst component which includes magnesium, titanium, halogen and an electron donative compound as essential constituents; (B) is an organoaluminum component; and (C) is at least two electron donative compounds (&agr;) and (&bgr;), wherein the pentad stereoregularity of a xylene insoluble fraction of a homopolyproylene is 0<mmrr/mmmm≦0.0068 when electron donative compound (&agr;) is used in combination with (A) and (B), and the pentad stereoregularity of a xylene insoluble fraction homoproplyene of a is 0.0068<mmrr/mmmm ≦0.0320 when electron donative compound (&bgr;) is used in combination with (A) and (B). A polypropylene produced in the process can be used to obtain a biaxially oriented film. (A) and (B). A polypropylene produced in the process can be used to obtain a biaxially oriented film.Type: GrantFiled: February 7, 2000Date of Patent: January 8, 2002Assignee: Sumitomo Chemical Company, Ltd.Inventors: Takeshi Ebara, Koji Mizunuma, Toshio Sasaki, Kazuki Wakamatsu, Junichi Kimura, Yoichi Obata
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Publication number: 20020002254Abstract: An olefin polymer selected from the group consisting of a 1-butene homopolymer, a copolymers of 1-butene with propylene and a copolymer of 1-butene with an alkenyl hydrocarbon having 5 or more carbon atoms, wherein said olefin polymer is an amorphous polymer having a polystyrene-reduced number average molecular weight of 200,000 and substantially not having a melting point,Type: ApplicationFiled: August 7, 2001Publication date: January 3, 2002Applicant: Sumitomo Chemical Company, Ltd.Inventors: Masayuki Fujita, Tatsuya Miyatake
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Patent number: 6331620Abstract: Solid catalyst components for the polymerization of olefins, comprising titanium, magnesium and a compound of general formula (I), wherein R1 and R2 may be the same or different and each represents a linear or branched hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 1 to 10, as an electron donor, which are combined with organoaluminum compounds to form polymerization catalysts for the production of olefin polymers. This electron donor has no problems of safety and hygiene, and is inexpensive and easily synthesized. This compound can provide highly active and highly stereoregular solid catalyst components for the polymerization of olefins, catalysts for the polymerization of olefins, and processes for producing olefin polymers.Type: GrantFiled: February 22, 2000Date of Patent: December 18, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasunori Kadoi, Tsuyoshi Ota, Toshio Isozaki, Kiyokazu Katayama, Takanori Sadashima
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Patent number: 6329477Abstract: This invention relates to a method of making polymer compositions, e.g. EPDM compositions, in a multistage reactor with monomers chosen from ethylene, C3-C8 alpha olefins, and a non conjugated diene. In particular, the invention relates to a process for improving diene conversion during the manufacture of the aforementioned polymer compositions by use of a multistage reactor and a metallocene catalyst system.Type: GrantFiled: March 2, 1999Date of Patent: December 11, 2001Assignee: ExxonMobil Chemical Patents Inc.Inventors: Bruce A. Harrington, Charles C. Cozewith, Sudhin Datta, Bernard J. Folie, John F. Walzer, Jr., Donna J. Crowther
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Patent number: 6313242Abstract: Metallocene catalyst components having bis-fluorenyl ligands of a staggered conformation and processes for the isotactic propagation of a polymer chain from ethylenically unsaturated monomers. The catalyst components comprise bridged bis-fluorenyl metallocenes characterized by the following formula: X(FlYa)(Fl′Zb)MeQn (1) wherein, Fl and Fl′ are fluorenyl groups which are interconnected by a structural bridge X to impart stereorigidity to the metallocene ligand, Me is a Group 3, 4, or 5 transition metal each Y is the same or different and is a hydrocarbyl or heterohydrocarbyl substittient at a distal position on the fluorenyl group, each Z is the same or different and is a hydrocarbyl or heterohydrocarbyl substituent at a distal position on the other fluorenyl group Fl′, and a and b are each independently 1 or 2.Type: GrantFiled: August 31, 1999Date of Patent: November 6, 2001Assignee: Fina Technology, Inc.Inventor: Baireddy R. Reddy
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Patent number: 6306985Abstract: Disclosed is a high activity solid catalyst for synthesizing low-, medium- and high-density polyethylenes by a slurry phase process, prepared by using commercial powered magnesium as raw material, forming a magnesium halide in the nascent state, followed by successively treating said magnesium halide with an alcohol compound and an alkyl aluminum compound, then reacting the resulting suspension of the spheroidal, porous solid complex carrier with a titanium compound in the presence of an electron donor compound an alkyl aluminum compound to obtain a main catalyst component and finally mixing the catalyst component with an organometallic compound as cocatalyst.Type: GrantFiled: July 13, 1999Date of Patent: October 23, 2001Assignee: China Petrochemical CorporationInventors: Mingwei Xiao, Shijiong Yu, Xiaofeng Ye