Group Ivb Metal Oxide (ti, Zr, Hf) Patents (Class 526/107)
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Publication number: 20020176974Abstract: A heat-seal polymer film and method of forming such film is provided. The heat-seal film is formed from metallocene-catalyzed isotactic random copolymers of propylene and at least one other C2 to C8 alpha olefin, such as ethylene random. Such films show improved heat-seal characteristics, such as reduced seal initiation temperatures (SIT's) and improved heat-seal strength, as well as other improved properties.Type: ApplicationFiled: March 16, 2001Publication date: November 28, 2002Inventors: Aiko Hanyu, Scott D. Cooper, Mark Miller
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Patent number: 6441110Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 50 mol % and an average molecular weight Mn of 280-10000 dalton by the cationic polymerization in the liquid phase of isobutene or hydrocarbon mixtures comprising isobutene comprises polymerizing at from −30° C. to +40° C. in the presence of a heterogeneous polymerisation catalyst comprising one or more oxides of the elements of transition groups V and VI of the Periodic Table of the Elements or in the presence of a heterogeneous polymerization catalyst comprising one or more oxidic compounds of one or more elements of transition groups V and VI of the Periodic Table of the Elements supported on a non-zeolitic oxidic support material which is not an oxygen-containing zirconium compound, the catalyst not containing a technically effective amount of halogen.Type: GrantFiled: August 6, 1999Date of Patent: August 27, 2002Assignee: BASF AktiengesellschaftInventors: Christoph Sigwart, Thomas Narbeshuber, Karsten Eller, Manfred Barl, Rolf Fischer, Eugen Gehrer
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Publication number: 20020111442Abstract: Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.Type: ApplicationFiled: August 23, 2001Publication date: August 15, 2002Inventors: Richard R. Schrock, Robert Baumann
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Patent number: 6384154Abstract: A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 60 mol % and an average molecular weight Mn of 800-3000 dalton by cationic polymerization in the liquid phase of isobutene over an acidic, essentially halogen-free heterogeneous catalyst, where a) a hydrocarbon mixture of essentially C4-hydrocarbons comprising isobutene in an amount of from 10 to 80% by weight is used as the starting material and b) polymerization is carried out continuously at from −30 to 0° C. with average starting material residence times of one hour or less, where the temperature and the residence time are selected such that the isobutene conversion is less than 60% and, after separation from the resulting polyisobutene, the isobutene is either enriched in the partially converted hydrocarbon mixture and returned to the polymerization or passed to another isobutene reaction coupled with the polymerization.Type: GrantFiled: January 31, 2001Date of Patent: May 7, 2002Assignee: BASF AktiengesellschaftInventors: Christoph Sigwart, Thomas Narbeshuber, Eugen Gehrer, Rolf Fischer, Ulrich Steinbrenner, Shelue Liang
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Patent number: 6362294Abstract: This invention is directed to reduced oxidation state Group 4-6 metal compounds, preferably the first row metals in those groups, suitable for activation as polymerization catalysts and characterized by comprising a substituted hydrotris(pyrazolyl)borate ancillary ligand and a plurality of single or multidentate uninegative ligands, excluding cyclopentadienyl ligands. The invention includes a polymerization process characterized by comprising contacting one or more monomers polymerizable by coordination or insertion polymerization under suitable polymerization conditions with these catalyst compositions.Type: GrantFiled: December 11, 1997Date of Patent: March 26, 2002Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Phillip T. Matsunaga, Rinaldo S. Schiffino
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Patent number: 6316555Abstract: Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.Type: GrantFiled: March 4, 1999Date of Patent: November 13, 2001Assignee: Massachusetts Institute of TechnologyInventors: Richard R. Schrock, Robert Baumann
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Publication number: 20010020073Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituentsType: ApplicationFiled: January 2, 2001Publication date: September 6, 2001Inventors: Wolf Spaether, Stephan Huffer, John Lynch, Wolfgang Bidell, Joachim Rosch, Gunther Schweier, Roland Hingmann, Alexandre Segul, Rainer Hemmerich, Ingo Treffkorn
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Patent number: 6271325Abstract: This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula: wherein M is a group 3 to 14 metal, each X is independently an anionic leaving group, n is the oxidation state of M, m is the formal charge of the YZL ligand, Y is a group 15 element, Z is a group 15 element, L is a group 15 or 16 element, R1 and R2 are independently a C1 to C20 hydrocarbon group, a heteroatom containing group, silicon, germanium, tin, lead, phosphorus, a halogen, R1 and R2 may also be interconnected to each other, R3 is absent, or is hydrogen, a group 14 atom containing group, a halogen, a heteroatom containing group, R4 and R5 are independently an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or multiple ring system, R6 and R7 are independently absent or hydrogenType: GrantFiled: May 17, 1999Date of Patent: August 7, 2001Assignee: Univation Technologies, LLCInventors: David H. McConville, Richard R. Schrock
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Patent number: 6239237Abstract: Olefin co- or homopolymers having a good molecular weight and short chain branching may be prepared in the presence of a tridentate complex of a Group 8, 9 or 10 metal.Type: GrantFiled: April 22, 1999Date of Patent: May 29, 2001Assignee: Nova Chemicals (International) S.A.Inventors: Wei Xu, Qinyan Wang, Ryan Paul Wurz
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Patent number: 6200922Abstract: The catalyst systems comprise as active constituents a) a titanium-containing solid component comprising a compound of titanium, a compound of magnesium, a halogen, an inorganic oxide as support and a carboxylic ester as electron donor compound, and also, as cocatalyst, b) an aluminum compound and c) optionally a further electron donor compound, wherein the inorganic oxide used has a pH of from 1 to 6, an average particle diameter of from 5 to 200 &mgr;m, an average primary particle diameter of from 1 to 20 &mgr;M and voids or channels having an average diameter of from 0.1 to 20 &mgr;m and a macroscopic share of the volume of the overall particle within the range from 5 to 30%.Type: GrantFiled: June 5, 1997Date of Patent: March 13, 2001Assignee: BASF AktiengesellschaftInventors: Stephan Hüffer, Wolfgang Bidell, Patrik Müller, Ulrich Moll, Roland Hingmann, Günther Schweier
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Patent number: 6194528Abstract: A process for producing polyethylene having impact resistance, the process comprising polymerizing ethylene, or copolymerizing ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, in the presence of a chemically reduced chromium-based catalyst containing in a support thereof from 2 to 3 wt % of titanium, based on the weight of the catalyst. The invention also provides a chromium-based catalyst for the production of polyethylene by polymerizing ethylene or copolymerizing ethylene and an alpha-olefinic comonomer comprising from 3 to 10 carbon atoms, the catalyst being chemically reduced and containing in a support from 2 to 3 wt % of titanium, based on the weight of the catalyst.Type: GrantFiled: February 9, 1998Date of Patent: February 27, 2001Assignee: Fina Research, S.A.Inventor: Guy Debras
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Patent number: 6187879Abstract: A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and/or an olefin and at least one or more other olefin(s) under polymerization conditions with an olefin polymerization catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.Type: GrantFiled: August 31, 1999Date of Patent: February 13, 2001Assignee: Eastman Chemical CompanyInventors: Randal Ray Ford, Jeffrey James Vanderbilt, Roxanna Lea Whitfield, Glenn Edward Moore
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Patent number: 6077809Abstract: A novel high-porosity adsorbent material for selective adsorption of fluoride ions, arsenic ions and phosphate ions as well as a method for the preparation thereof are disclosed. The adsorbent material consists of a porous carrier material such as crosslinked polyacrylate resin beads and a crystalline hydrous zirconium oxide impregnating the pores of the carrier in the monoclinic or cubic crystal form.Type: GrantFiled: June 30, 1998Date of Patent: June 20, 2000Assignee: Japan as represented by Director General of Agency of Industrial Science and TechnologyInventors: Toshishige Suzuki, Hideyuki Matsunaga, Toshiro Yokoyama
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Patent number: 5962608Abstract: In one embodiment, the present invention relates to a polymer prepared from a mixture containing a polymerization material and a polycondensation product of a partially hydrolyzed chelated metal oxide precursor. In another embodiment, the present invention relates to a process for making a polymer involving contacting a polymerization material with a metal oxide sol comprising a liquid and a polycondensation product of a partially hydrolyzed chelated metal oxide precursor to form a mixture and at least one of polymerizing and curing the mixture of the polymerization material and the polycondensation product.Type: GrantFiled: February 13, 1998Date of Patent: October 5, 1999Assignee: Reliance Electric Industrial Co.Inventors: Hong-Son Ryang, Young Jin Chung, Joseph T. Snyder, II, An-Min Jason Sung
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Patent number: 5945575Abstract: A process for the preparation of halogen-free, reactive polyisobutene having a content of terminal double bonds of more than 50 mol % and an average molecular weight M.sub.n of from 500 to 5000 dalton by the cationic polymerization of isobutene or isobutene-containing hydrocarbon mixtures in the liquid phase, wherein the polymerization is carried out at a temperature of from -30.degree. to +40.degree. C. over a heterogeneous polymerization catalyst containing at least one element acting as promoter and selected from Group IB, Group IIB, Group IIIB, Group IVB, Group VB, Group VIIB, or Group VIIIB of the Periodic Table or from Group IIA, Group IIIA, Group IVA, Group VA, or Group VIA of the Periodic Table or a number of said elements in each case in the form of an oxygen-containing compound and zirconium in the form of an oxygen-containing compound, said polymerization catalyst containing no industrially effective amounts of halogens.Type: GrantFiled: January 27, 1998Date of Patent: August 31, 1999Inventors: Christoph Sigwart, Eugen Gehrer, Ulrich Muller, Hans Peter Rath, Rolf Fischer
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Patent number: 5889128Abstract: Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.Type: GrantFiled: April 11, 1997Date of Patent: March 30, 1999Assignee: Massachusetts Institute of TechnologyInventors: Richard R. Schrock, Robert Baumann
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Patent number: 5691430Abstract: A process for polymerizing a vinyl ether monomer which comprises contacting the vinyl ether with an initiator system of silicon dioxide and a one or more metallic oxides.Type: GrantFiled: August 26, 1996Date of Patent: November 25, 1997Assignee: ISP Investments Inc.Inventors: James A. Dougherty, John G. Mc Kittrick, Raymond Bret Clark
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Patent number: 5391657Abstract: A method for reducing sheeting during polymerization of an alpha-olefin by feeding either a positive charge generating (MgO, ZnO, Al.sub.2 O.sub.3, CuO, and mixtures thereof) or a negative charge generating (V.sub.2 O.sub.5, SiO.sub.2, TiO.sub.2, Fe.sub.2 O.sub.3, and mixtures thereof) inorganic chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive is added in amounts which substantially neutralizes the electrostatic charge in the reactor.Type: GrantFiled: September 27, 1993Date of Patent: February 21, 1995Assignee: Union Carbide Chemicals & Plastics Technology CorporatonInventors: Gyung-Ho Song, Aaron S. Rhee, Gerald R. Lowder
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Patent number: 5359102Abstract: A transition metal compound represented by the formula ##STR1## (wherein each of A.sup.1, A.sup.2, A.sup.3 and A.sup.4 is a cyclopentadienyl group, an indenyl group, a fluorenyl group or their derivative; A.sup.5 is a hydrocarbondiylidene group having 4 to 30 carbon atoms; a pair of A.sup.1 and A.sup.2 as well as a pair of A.sup.3 and A.sup.4 is respectively bonded to the identical carbon atom in A.sup.5 to form a crosslinking structure; each of R.sup.1 and R.sup.2 is a halogen atom, a hydrogen atom, an alkyl group or a silicon-containing alkyl group having 1 to 10 carbon atoms, an aryl group, an alkylaryl group, an arylalkyl group or a halogenated aryl group having 6 to 20 carbon atoms; R.sup.1 and R.sup.2 may be identical or different; each of M.sup.1 and M.sup.2 is titanium, zirconium or hafnium; and M.sup.1 and M.sup.2 may be mutually identical or different), and a method for polymerizing an olefin in the presence of this compound and a co-catalyst.Type: GrantFiled: October 8, 1992Date of Patent: October 25, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Norihide Inoue, Tetsunosuke Shiomura, Masahiro Kouno, Yoshiho Sonobe, Kazumi Mizutani
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Patent number: 5322910Abstract: Olefins are polymerized with a catalyst system composition comprising a nickel compound and an aromatic carboxylic acid wherein there is a heteroatom linkage between the aromatic moiety and the carboxylic acid functional group. The novel catalyst system composition can be heterogeneous or homogeneous. This composition allows the production of one or more olefin polymers which have a very high molecular weight.Type: GrantFiled: September 17, 1993Date of Patent: June 21, 1994Assignee: Phillips Petroleum CompanyInventor: An-hsiang Wu
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Patent number: 5179178Abstract: A process for polymerizing olefins wherin a suitable amount of a fumed refractory oxide is used to improve the flow of particulate catalyst as a slurry of that catalyst is charged to the polymerization zone.Type: GrantFiled: May 15, 1992Date of Patent: January 12, 1993Assignee: Phillips Petroleum CompanyInventors: Elizabeth M. Stacy, M. Bruce Welch, Shirley J. Martin, Max P. McDaniel, Dale E. Pierce
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Patent number: 5114990Abstract: There is described a process for the production of pigment/plastic premixes characterized by homogeneous distribution of pigment in a polymer matrix. The invention is based on the polymerization of olefins carried out by means of a process using Ziegler catalyst. Significantly the polymerization occurs on the surface of the pigment particles, after the prior activation of the pigment particles.Type: GrantFiled: May 4, 1990Date of Patent: May 19, 1992Assignee: Felix Schoeller Jr. GmbH KGInventor: Ralf-Burkhard Dethlefs
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Patent number: 4923935Abstract: A process for producing polyethylene of ultrahigh molecular weight having an intrinsic viscosity of 10-30 dl/g at 135.degree. C. in decalin is disclosed which comprises at least the following two stages of polymerization reaction: (a) a first reaction stage where in ethylene is polymerized with use of a catalyst comprising a solid component containing at least Mg, Ti and/or Va and in the absence or presence of hydrogen of reduced concentration to produce 70-99.5 weight parts of polyethylene having an intrinsic viscosity of 12-32 dl/g at 135.degree. C. in decalin; and (b) a second reaction stage wherein a fresh feed of ethylene is polymerized in the presence of hydrogen of higher concentration to produce 30-0.5 weight parts of polyethylene having an intrinsic viscosity of 0.1-5 dl/g at 135.degree. C. in decalin.Type: GrantFiled: January 26, 1989Date of Patent: May 8, 1990Assignee: Nippon Oil Co., Ltd.Inventors: Akira Sano, Shigeki Yokoyama, Yasunosuke Miyazaki, Tetsujiro Kuroishi, Kazuo Matsuura
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Patent number: 4855001Abstract: A one-component heat stable, adhesive for metal surfaces such as iron, zinc, copper, cadmium and their alloy will cure upon contact with the metal surface. The adhesive composition includes olefinically unsaturated monomer; at least one phenoxy resin together with other reactive or non-reactive polymers; an acidic material; a compound containing sulfonyl halide group; and a compound containing a transition metal, in particular TiO.sub.2. The adhesive composition cures rapidly upon contact with a metal surface to form an adhesive bond between the surfaces. The adhesive composition is especially useful as an adhesive for galvanized steel parts subjected to elevated paint curing temperatures.Type: GrantFiled: February 10, 1987Date of Patent: August 8, 1989Assignee: Lord CorporationInventors: Dennis J. Damico, Ruth M. Bennett
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Patent number: 4345055Abstract: In accordance with a first embodiment of this invention, a silica xerogel is aqueously impregnated with a titanium compound which is resistant to hydrolysis. In accordance with a second embodiment of this invention, a silica hydrogel containing a titanium compound resistant to hydrolysis is dried. In this embodiment, the hydrogel preferably also contains a pore preserving agent. This invention makes possible the use of aqueous impregnation of titanium and conventional drying techniques to give a catalyst having characteristics associated with azeotrope dried silica-titanium coprecipitated catalyst. The catalysts of this invention are useful in olefin polymerization processes, particularly in the polymerization of predominantly ethylene monomer systems under slurry conditions.Type: GrantFiled: May 20, 1981Date of Patent: August 17, 1982Assignee: Phillips Petroleum CompanyInventor: Gil R. Hawley
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Patent number: 4296001Abstract: In accordance with a first embodiment of this invention, a silica xerogel is aqueously impregnated with a titanium compound which is resistant to hydrolysis. In accordance with a second embodiment of this invention, a silica hydrogel containing a titanium compound resistant to hydrolysis is dried. In this embodiment, the hydrogel preferably also contains a pore preserving agent. This invention makes possible the use of aqueous impregnation of titanium and conventional drying techniques to give a catalyst having characteristics associated with azeotrope dried silica-titanium coprecipitated catalyst. The catalysts of this invention are useful in olefin polymerization processes, particularly in the polymerization of predominantly ethylene monomer systems under slurry conditions.Type: GrantFiled: February 6, 1980Date of Patent: October 20, 1981Assignee: Phillips Petroleum CompanyInventor: Gil R. Hawley
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Patent number: 4265785Abstract: New, highly active catalysts for the polymerization of ethylene and mixtures of ethylene with higher alpha-olefins and/or diolefins, are disclosed. The catalysts are prepared by mixing (a) hydrides or organometallic compounds of metals belonging to Groups I, II or III of the Mendelycev Periodic Table with (b) the products obtained by contacting titanium compounds with activated anhydrous halides of magnesium or manganese, diluted with anhydrous compounds of metals belonging to Group III or IV of said Periodic Table, and which are different from either (a) or the titanium compound of (b).Type: GrantFiled: August 10, 1979Date of Patent: May 5, 1981Assignee: Montecatini Edison S.p.A.Inventors: Umberto Giannini, Paolo Longi, Domenico Deluca, Angelo Pricca
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Patent number: 4239872Abstract: Polymerization catalysts are prepared by impregnation of a silica or aluminum support with a vanadium, titanium and/or chromium salt decomposable upon calcination to the oxide, calcining the impregnated support at about 500.degree.-700.degree. C., impregnating the calcined support with a solution of aluminum hydride and heating the resultant material to about 300.degree. C.-500.degree. C. in hydrogen. The catalyst is extremely active for the polymerization of lower molecular weight olefins such as ethylene and ethylene-propylene mixtures.Type: GrantFiled: October 17, 1979Date of Patent: December 16, 1980Assignee: Shell Oil CompanyInventor: Lynn H. Slaugh
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Patent number: 4186260Abstract: A method for preparing a composition of matter comprising silica and titanium, convertible to a catalyst suitable for olefin polymerization by the addition of chromium and the process performable therewith, the preparation involving adding an alkali metal silicate to an acid containing a titanium compound, and recovering a dry gel for use as a polymerization catalyst upon the addition of chromium.Type: GrantFiled: August 1, 1978Date of Patent: January 29, 1980Assignee: Phillips Petroleum CompanyInventor: Richard E. Dietz
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Patent number: 4125698Abstract: Method for the polymerization of alpha-olefins, e.g., ethylene and its higher homologs, to produce high molecular weight polymers by contacting the alpha-olefin or an alpha-olefin mixture to be polymerized with a catalyst formed from a mixture of a first and second component, the first component essentially consisting of a dialkyl, diaryl organoaluminum compound, or aluminum hydride, and preferably a dialkyl aluminum halide, e.g., diethyl aluminum chloride, and the second component essentially consisting of a salt, freshly precipitated oxide or hydroxide of a Group IVB, VB, VIB or VIII of the Periodic System, and most preferably a salt, such as titanium chloride.Type: GrantFiled: October 29, 1958Date of Patent: November 14, 1978Assignee: Studiengesellschaft Kohle M.b.h.Inventors: Karl Ziegler, Heinz Breil, Heinz Martin, Erhard Holzkamp
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Patent number: 4119569Abstract: A method for preparing a composition of matter comprising silica and titanium, convertible to a catalyst suitable for olefin polymerization by the addition of chromium and the process performable therewith, the preparation involving adding an alkali metal silicate to an acid containing a titanium compound, and recovering a dry gel for use as a polymerization catalyst upon the addition of chromium.Type: GrantFiled: May 2, 1977Date of Patent: October 10, 1978Assignee: Phillips Petroleum CompanyInventor: Richard E. Dietz
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Patent number: 4101445Abstract: Ethylene polymerization catalysts are prepared by depositing a chromocene compound on a support with a titanium compound and activating the final blend at 300.degree. C. to about 1000.degree. C. A fluoriding agent can be optionally added where a narrower molecular weight distribution of the polyethylene to be obtained is desired. Catalysts with good reproducibility, when prepared by this method, show particular utility in production of polyethylene by a fluid bed process.Type: GrantFiled: September 22, 1976Date of Patent: July 18, 1978Assignee: Union Carbide CorporationInventors: Isaac Jacob Levine, Frederick John Karol
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Patent number: 4063009Abstract: Alpha olefins are polymerized alone or in admixture at comparatively low pressures to produce polymers employing a two-component catalyst wherein one component is an organozinc or organomagnesium compound, e.g. zinc diethyl, magnesium diphenyl, propyl magnesium chloride, etc. The other component is a salt, oxide or hydroxide of a metal of Group IV-B, V-B or VI-B of the Periodic System, including thorium and uranium.Type: GrantFiled: July 1, 1958Date of Patent: December 13, 1977Assignee: Studiengesellschaft Kohle m.b.H.Inventors: Karl Ziegler, deceased, Heinz Breil, Erhard Holzkamp, Heinz Martin
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Patent number: 3954699Abstract: A Process for polymerizing cycloolefins by ring opening reaction using heterogeneous catalyst containing tungsten trioxide and Lewis acid or tungsten trioxide, Lewis acid and organoaluminum compound as the polymerization catalyst.Type: GrantFiled: August 30, 1974Date of Patent: May 4, 1976Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Shoichi Matsumura, Itaru Hatano
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Patent number: 3953410Abstract: A substantially amorphous ethylene-.alpha.-olefin-diolefin rubbery interpolymer is obtained by interpolymerizing ethylene, an .alpha.-olefin, and as a third component a specified diolefin having a norbornene ring with a catalyst system comprising a specified combination of an ether or ester compound, an organoaluminum compound, and a transition metal compound. The resulting rubbery interpolymer has an excellent extrudability and gives a cured product having favorable physical properties.Type: GrantFiled: April 12, 1974Date of Patent: April 27, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Daizaburo Imai, Keisaku Yamamoto
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Patent number: RE28850Abstract: A process for preparing alternating copolymer of butadiene and .alpha.-olefine which comprises contacting butadiene and the .alpha.-olefine in liquid phase with a catalyst system comprising the first component of AIR.sub.3 wherein R represents a hydrocarbon radical selected from the group consisting of alkyl, aryl and cycloalkyl radical in which at least one R is selected from the group consisting of alkyl having at least 3 carbon atoms per one molecule, aryl and cycloalkyl radical and the second component of TiX'.sub.4 wherein X' is selected from the group consisting of chlorine, bromine and iodine, or a catalyst system comprising the first component of AlR.sub.3 wherein R represents a hydrocarbon radical selected from the group consisting of alkyl, aryl and cycloalkyl radical, and the second component of TiX'.sub.4 wherein X' is the same as that defined above and the third component of a carbonyl group-containing compound. An alternating copolymer of butadiene and .alpha.Type: GrantFiled: July 9, 1975Date of Patent: June 8, 1976Assignee: Maruzen Petrochemical Co., Ltd.Inventors: Akihiro Kawasaki, Isao Maruyama