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6476163 |
Catalysts for the polymerization of olefins and process for the preparation thereof
Catalysts for the polymerization of olefins are disclosed, comprising the product obtainable by contacting: (A) a bridged and/or substituted cyclopentadienyl compound of Ti, Zr or Hf; (B) one or...
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6475945 |
Functionalized catalyst supports and supported catalyst systems
The present invention relates to functionalized catalyst supports that are useful in the formation of supported polymerization catalysts, supported catalysts derived from such functionalized...
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6476164 |
Carbenium cationic complexes suitable for polymerization catalysts
This description addresses a process for the preparation of polyolefins from one or more olefinic monomers comprising combining under polymerization conditions said olefins with the product of...
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6476173 |
Propylene homopolymers and methods of making the same
This invention relates to isotactic propylene homopolymer compositions obtained from metallocene catalysis wherein the polymer has a molecular weight distribution (Mw/Mn) in the range of from about...
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6475947 |
Oligomeric metallocenes and their use
A process for producing a new metallocene comprising reacting a first bridged metallocene which has an olefinically unsaturated with about two molar equivalents of an alkali metal alkyl, catalyst...
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6476166 |
Aluminum-based lewis acid cocatalysts for olefin polymerization
This invention is directed to a process for the preparation of polyolefins from one or more olefinic monomers comprising combining said olefins under olefin polymerization conditions with an...
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6469113 |
Method for producing supported metallocene catalyst and olefin polymerization process using the same
The present invention relates to a method for producing supported metallocene catalyst and an olefin polymerization process using same, and more particularly to a method for manufacturing supported...
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6469117 |
Dialkenyl-tricyclic-nonaromatic/olefin polymers
A process is provided to produce a dialkenyl-tricyclic-nonaromatic/olefin polymer. The process comprises contacting at least one dialkenyl-tricyclic-nonaromatic compound, at least one olefin, at...
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6469114 |
Metallocene compound and polymerization catalyst comprising heterocyclic group
Disclosed are compounds of the following core structure, and their use as polymerization catalysts: wherein M 1 is a group lVb transition metal, R 5 is a substituted aryl group, and R a forms...
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6465543 |
Polyolefin nanocomposites
The present invention is a nanocomposite which is a dispersion of nanofiller particles derived from layered metal oxides or metal oxide salts. The nanocomposite is advantageously prepared by first...
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6465585 |
Chromium-based catalyst composition for producing conjugated diene polymers
A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a chromium-containing compound; (b) an organomagnesium compound; and (c) a silyl phosphonate,...
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6465386 |
Polymerization catalyst
A polymerization catalyst comprising (1) a catalyst having a compound of the Formula (I): (2) a further catalyst for the polymerization of 1-olefins which is different from catalyst (1).
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6465385 |
Zwitterionic polymerization catalyst
The present invention is a new catalyst compositions and methods of making and using the same. These compositions comprise organometallic salts with large noncoordinating anions which contain at...
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6465384 |
Biscyclopentadienyl diene complexes
Biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the diene is bound to the transition metal either in the form of a σ-complex or a π-complex in...
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6462156 |
Catalyst activators comprising expanded anions
Catalyst compositions comprising a group 4 metal complex and an activator corresponding to the formula: (A* +a ) b (Z*J* j ) −c d , wherein: A* is a cation of charge +a, selected from the group...
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6462149 |
Control of resin split in single-reactor manufacture of bimodal polyolefins
Bimodal resin products are produced in a single reactor by using two bicomponent catalyst compositions, each having a high molecular weight and a low molecular weight component, in different...
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6462161 |
Polyolefin composition with molecular weight maximum occurring in that part of the composition that has the highest comonomer content
The invention relates to a polyolefin copolymer composition produced with a catalyst having a metallocene, complex in a single reactor for the polymer of an α-olefin monomer with one or more...
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6462136 |
Ethylene copolymer and process for producing the same, resin composition containing the copolymer, and uses of these
The present invention is intended to provide an ethylene copolymer having excellent mechanical properties and moldability, a process for preparing the copolymer, a resin composition containing the...
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6462154 |
Process for preparing olefin polymer and catalyst for polymerization of olefin
There are disclosed a catalyst for the polymerization of an olefin which comprises (A) a transition metal complex compound represented by the general formula (I) wherein the respective symbols...
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6462212 |
Transition metal compounds having conjugate aluminoxate anions and their use as catalyst components
Novel, highly effective catalyst compositions are described in which a low cost co-catalyst can be employed at very low aluminum loadings. Such compounds are composed of a cation derived from...
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6458904 |
Catalyst for the (co)polymerization of alk-1-enes
A catalyst composition suitable for the (co)polymerization of alk-1-enes is obtainable by mixing a metallocene complex with a C 3 -C 20 -alk-1-ene in an inert solvent, reacting the resulting...
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6458901 |
Propylenic copolymer and thermoplastic resin composition
A propylene copolymer comprising propylene, at least one olefin selected from the group consisting of olefins having 2 to 20 carbon atoms except propylene, and a cyclic olefin, wherein the total...
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6455457 |
Supported polymerization catalyst
A supported catalyst system suitable for the polymerization of olefins prepared by a specific preparative route comprising optionally pretreating a support followed by addition of a neutral metal...
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6455647 |
Solid catalyst for olefin polymerization and process for producing olefin polymer with the same
The present invention relates to a solid catalyst (D) for olefin polymerization comprising a magnesium-containing solid component (A) carrying thereon an organoaluminum-oxy compound (B) and a...
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6455659 |
Crystalline polypropylene and molded object and film thereof
Provided is a crystalline polypropylene of which the 0° C. soluble content, α (% by weight), as measured through programmed-temperature fractionation and the molecular weight, Mp, for the peak in...
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6455719 |
Constrained geometry ligands and complexes derived therefrom
A novel constrained geometry titanium(II) diene complex and ligands of such complexes are described. The novel complex has an olefin polymerization activity substantially in excess of a defined...
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6451419 |
Shock absorbing material
A shock-absorbing material composed of an expansion-molded article of polypropylene resin particles is excellent in shock-absorbing property and impact resilience compared with shock-absorbing...
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6451726 |
Pre-polymerized catalyst components for the polymerization of olefins
Components of catalysts for the polymerization of olefins are obtained by contacting a Ti compound of formula Ti(OR) n−y X y , where n is the valence of titanium and y is a number between 1 and...
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6451946 |
Copolymer, process for the production thereof, and molded article thereof
A copolymer of (a)ethylene and/or an α-olefin, (b) a cyclic olefin and (c) an alkenyl aromatic hydrocarbon, having acyclic olefin content of 0.01 to 66 mol % and a styrene content of 3 to 99 mol...
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6451725 |
Method for preparing catalyst components
Method for preparing a catalyst component for homo or copolymerization of olefins, said catalyst component comprising at least one metallocene compound on porous inorganic carrier, wherein said...
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6452031 |
Preparation of titanium organometallic complexes comprising a titanium bisalkoxide or dihalide moiety
Conversion of a ligand of titanium organometallic complex to a titanium bisalkoxy or a titanium dichloride is described.
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6451938 |
Polymerization catalyst system comprising heterocyclic fused cyclopentadienide ligands
The invention relates to a polymerization catalyst system comprising a catalytic complex formed by activating a transition metal compound which comprises a metal selected from group 3 through 10 of...
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6451724 |
Metallocenes and catalysts for olefin-polymerisation
A class of metallocenes of formula (I): (ZR 1 m ) n (Cp)(A) r ML p L′ q (I) wherein (ZR 1 m ) n , is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula...
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6451933 |
Bimetallic olefin polymerization catalysts
A bimetallic olefin polymerization catalyst is described. The catalyst comprises an organometallic compound, and optionally, an activator. The organometallic compound comprises a Group 3-5...
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6448424 |
Tetrahydrofluorenyl containing group 4 metallocenes useful as catalysts for the polymerization of olefins, process for their preparation and use of said metallocenes for the polymerization of olefins
Novel silylene or ethylene bis(tetrahydrofluorenyl)metallocenes are synthesized and used as olefin polymerization catalysts.
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6448356 |
Ethylene-α-olefin copolymer
An ethylene-α-olefin copolymer which is a copolymer of ethylene with a C 3-20 α-olefin and which satisfies the following conditions (a) to (c): (a) the density (D) is from 0.850 to 0.950 g/cm 3...
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6448358 |
Elastic polypropylenes and catalysts for their manufacture
A propylene polymeric composition with elastic character that is soluble in at least one nonpolar organic solvent selected from the group consisting of toluene, xylene, heptane, and hexane,...
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6448351 |
Elastomeric copolymers of ethylene with propylene and process for their preparation
Amorphous copolymers of ethylene with propylene, and optionally with minor amounts of polyenes, have the following characteristics: (A) the % content by mole of propylene in the copolymer (%P) and...
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6448350 |
Process for the preparation of copolymers of ethylene with alpha-olefins
Ethylene based copolymers having high molecular weights, narrow molecular weight distributions, and a very good homogeneous distribution of the comonomer units can be obtained in high yields at...
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6444605 |
Mixed metal alkoxide and cycloalkadienyl catalysts for the production of polyolefins
A solid self-supported cycloalkadienyl catalyst component is disclosed that includes: (i) a mixed metal alkoxide complex which is the reaction product of a magnesium alkoxide or aryloxide and at...
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6444774 |
Propylene polymers for fibers and fabrics
This invention relates generally to fibers and fabrics prepared using crystalline propylene polymer compositions comprising both propylene homopolymer and propylene copolymer. The propylene polymer...
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6444763 |
Polymerization of olefins
A particulate phyllosilicate mixture comprising a mixture containing a phyllosilicte belonging to the smectite group and a phyllosilicate belonging to the mica group, the phyllosilicate particle...
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6444606 |
Supported catalyst system, method for the production and use thereof in olefin polymerization
The invention relates to a catalyst system obtained by mixing at least one metallocene, at least one co-catalyst and at least one support which is rendered inert. The invention further relates to a...
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6444766 |
Method for producing carrier-borne catalysts
A process for preparing a supported catalyst comprises the steps of (1) preparation of a copolymer having comonomer units which comprise leaving groups; (2) polymer-analogous reaction with a...
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6444765 |
Olefin polymerization process for producing broad MWD polymers
An olefin polymerization process is described. The process comprises preparing a catalyst system by premixing a first organoaluminum with a supported boraaryl catalyst and then polymerizing an...
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6444607 |
Catalyst solution for the polymerization of α-olefins
A catalyst solution for polymerizing α-olefins is obtainable by reacting a metallocene compound with an activator compound which can react with the metallocene compound so as to displace a ligand...
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6444764 |
Supported catalyst system for polymerizing alk-1-enes
A catalyst system for polymorization of C 2 -C 12 -alk-1-eres, comprising A) an organic or inorganic support, B) at least one metallocene complex, C) oligomeric aluminum oxide compounds and D) at...
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6441211 |
Preparation of transition-metal-alkyl-complexes carrying a bidentate, dianionic ligand
A new process, particularly simple, convenient and practical, for the direct synthesis of organometallic compounds of formula(I): (A)(ZR 1 m ) n (A′)ML p L′ q (I) wherein (ZR 1 m ) n is a...
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6441111 |
Polydisperse propylene polymer and process for producing the same
A polydisperse propylene polymer characterized by being produced by polymerizing a propylene monomer or a mixed monomer of propylene and other olefin(s) by a multistage polymerization wherein the...
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6440890 |
Hydrocarbyl phosphinimine/cyclopentadienyl complexes of group IV metals and preparation thereof
New group 4 organometallic complexes are characterized by having a phosphinimine ligand and two or more cyclopentadienyl ligands. Certain of these complexes exhibit unusual behavior when examined...
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