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7638584 |
Olefin polymerization process
A process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of a catalyst system which comprises a bridged indenoindolyl transition metal complex...
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7619051 |
Butene-1/ethylene copolymer
A 1-butene/ethylene copolymer having a content of ethylene derived units from 0.1% to 5% by weight in which an ethylene content in the polymer (C 2 ) and a melting point of the polymer (Tm) meet...
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7612009 |
Process for homo-or copolymerization of conjugated olefines
Metal complexes, catalyst compositions containing the metal complexes, and processes for making the metal complexes and the catalyst compositions are described for the manufacture of polymers from...
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7598200 |
Ionic liquids for heterogenising metallocene catalysts
The present invention discloses a method for preparing an heterogeniseded catalyst component comprising the steps of: a) providing a halogenated precursor component of formula (I) —X—[—CH 2...
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7589042 |
Arylphenoxy catalyst system for producing ethylene homopolymer or copolymers of ethylene and α-olefins
Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of...
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7579415 |
Polymerization process using metallocene catalyst systems
The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound...
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7579423 |
Process for polymerizing 1-butene
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH 2 ═CHT wherein T is a C 3 -C 10 , alkyl group, in the presence of a...
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7550543 |
Polymer-based composites comprising carbon nanotubes as a filler, method for producing said composites, and associated uses
The invention relates to a method for producing carbon nanotubes in a dispersed state. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of...
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7547751 |
Process for the preparation of a polyolefin
The invention related to a process for the polymerization of at least one aliphatic C 2-20 or aromatic C 4-20 hydrocarbyl mono- or multiolefin in the presence of a catalyst and an aluminum...
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7538174 |
Isotactic 1-butene copolymers
An isotactic 1-butene copolymer having a content up to 30% by mol of at least one alpha-olefin of formula CH 2 ═CHZ derived units, wherein Z is a C 3 -C 20 hydrocarbon group, having the...
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7534848 |
1-butene copolymers and process for preparing them
A process comprising contacting 1-butene and one or more alpha-olefins under polymerization conditions in the presence of a catalyst system obtainable by contacting: (A) a metallocene compound of...
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7524906 |
Process for the preparation of a metal-organic compound comprising at least one imine ligand
The invention relates to a process for the preparation of a metal-organic compound, comprising at least one imine ligand, characterized in that an imine ligand according to formula 1, or the HA...
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7507782 |
Transition-metal complexes with tridentate, nitrogen-containing ligands
Transition metal complexes with tridentate, nitrogen-containing, uncharged ligand systems, a catalyst system comprising at least one of the transition metal complexes, the use of the catalyst...
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7504354 |
Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins
The present invention relates to organometallic transition metal compounds of the formula (I), a catalyst composition comprising at least one of the organometallic transition metal compound and an...
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7498390 |
Chromium complexes and their use in olefin polymerization
A composition having the formula I
where R 1 and R 2 are independently hydrogen, C 1 to C 12 linear and branched alkyl, C 3 to C 12 cycloalkyl, aryl, C 1 to C 12 alkoxy, F, Cl, SO 3 , C...
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7488789 |
Propylene copolymer, polypropylene composition, and uses thereof, transition metal compounds and catalyst for olefin polymerization
A propylene/1-butene random copolymer containing 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a...
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7482414 |
Transition metal complex ligand and olefin polymerization catalyst containing transition metal complex
The invention provides a transition metal complex of formula (3) below:
wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are the same or different and each independently...
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7479529 |
Fluoralcohol leaving group for non-metallocene olefin polymerization catalysts
A catalyst composition and method for olefin polymerization are provided. In one aspect, the catalyst composition is represented by the formula α a β b γ g MX n wherein M is a metal; X is a...
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7476717 |
Butene-1 homopolymer
A 1-butene homopolymer having the following characteristics:
intrinsic viscosity (I.V.)>0.7 dL/g isotactic triads (mm)>70%; 4,1 insertions<1%; a flexural modulus (ASTM D 638)>400...
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7456242 |
Melt-processible, wear resistant polyethylene
Melt-processible, thermoplastic polyethylene compositions of high resistance against wear are disclosed and methods for making and processing same. Additionally, products comprising these...
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7449534 |
Polymerization process for producing propylene copolymers
The invention provides a process for the preparation of a propylene polymer in which proplylene and a comonomer copolymerizable therewith and of greater molecular weight than propylene are...
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7446072 |
Preparation of supported catalyst systems containing reduced amounts of aluminoxanes
The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises
...
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7439379 |
Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
The present invention relates to a transition metal complex represented by the formula (I):
wherein M represents a Group 4 transition metal;
—Y— represents (a): —C(R 1 )(R 20 )-A-,...
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7435701 |
Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers
A catalytic composition, including a neutral metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using...
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7402638 |
Propylene polymer particle method of producing the same and use thereof
The present invention relates to a propylene random copolymer which satisfies the following requirements [1] to [4], and to various useful molded products obtained by molding the propylene random...
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7390862 |
Process for polymerizing 1-butene
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH 2 ═CHT wherein T is a C 3 -C 10 alkyl group, in the presence of a...
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7388062 |
Group IIIb metal complexes with “constrained geometry” fluorenyl based ligands
The present invention discloses a metallocene catalyst component based on a Group IIIb metal of the periodic Table and a bridged heteroatom-fluorenyl ligand. It also discloses its method of...
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7381679 |
Catalyst combination, isotactic polymers and also a method for producing linear isotactic polymers and the use thereof
The present invention relates to a catalyst combination for producing linear isotactic polymers containing an asymmetrical metal complex and also an activator.
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7371803 |
Catalyst composition II
This invention relates to a transition metal catalyst compound represented by the formula: LMX 2 or (LMX 2 ) 2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9,...
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7368411 |
Supported metallocene catalysts and their use in producing stereospecific polymers
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers which contain three or more carbon atoms or...
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7365039 |
Morphology controlled olefin polymerization process
A catalyst composition, method of formation and process of use in the polymerization of olefin monomers, said composition comprising a catalyst compound, an activator capable of converting said...
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7355058 |
Haloaluminoxane compositions, their preparation, and their use in catalysis
Novel haloaluminoxane compositions have been formed. The halogen is fluorine, chlorine, and/or bromine, and the amount of halogen atoms present in said composition is in the range of about 0.5 mole...
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7345119 |
Olefin polymerization catalyst and olefin polymerization method using the same
An olefin polymerization solid catalyst including a reaction product of a transition metal compound and an organoaluminum compound carried on a support having silica treated with an...
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7335711 |
Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins
Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C 3+ ...
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7320950 |
Propylene polymer, and resin composition and molded product thereof
The propylene polymer of the present invention satisfies (1) a 25° C. hexane soluble content (H25) of 0-80 wt %; and (2) either no melting temperature (Tm) measurable by differential scanning...
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7309748 |
Group III bridged ionic metallocene based on cyclopentadienyl-fluorenyl ligands
The present invention discloses a metallocene catalyst component of the formula (I) [(Flu-R″-Cp) 2 M] − [Li(ether) 4 ] + , wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is...
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7307177 |
Metallocene complexes, their synthesis and use in catalyst systems for olefin polymerization
A metallocene complex is represented by the the formula
(C p R 5 ) n MX k
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7300994 |
Isotactic polypropylene containing polymers
Isotactic polypropylene homopolymers or segments of low polydispersity are prepared using phenoxyketimine catalysts containing N-pentafluorophenyl groups.
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7294681 |
Mutliple catalyst system for olefin polymerization and polymers produced therefrom
This invention relates to a polymer of one or more C3 to C40 olefins, optionally one or more diolefins, and less than 15 mole % of ethylene, and polymerization processes for producing the same.
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7294600 |
Supported hybrid metallocene catalyst, method for preparing the same, and method for preparing polyolefin using the same
The present invention relates to a supported metallocene catalyst used for preparing polyolefin whose physical properties and molecular weight distribution can be easily controlled, a method for...
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7276567 |
Heterocyclic substituted metallocene compounds for olefin polymerization
This invention relates to compounds represented by formula:
wherein
M is a group 3, 4, 5 or 6 transition, lanthanide, or actinide metal atom; E is an indenyl ligand substituted in any position...
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7268095 |
Transition metal catalysts for (co) polymerizing of olefinic monomers
A compound of the formula Ia or Ib;
where, in the formula Ia, E 1 is O, S, Se, Te, NR, CR 2 , or PR; E 2 , E 3 are each CR, N, or P; E 4 is N, or P; E 5 is OH, SH, NHR, OR′, SR′,...
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7265193 |
Polymerization process
This invention relates to a process to polymerize olefins comprising:
contacting: (i) propylene and (ii) a mixture comprising, optionally ethylene, and three or more different alpha olefins...
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7259216 |
Method for producing highly branched ethylene polymers
A process for preparing highly branched ethylene polymers comprises polymerizing ethylene over a catalyst system comprising a compound of the formula Ia or Ib
and an activator, where the...
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7247687 |
Late transition metal catalysts for olefin polymerization and oligomerization
This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by...
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7244795 |
Polymerization process using metallocene catalyst systems
The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound...
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7241715 |
Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance...
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7241848 |
Process for preparing low molecular weight olefin (CO)polymer and polymerization catalyst used therefor
The present invention provides a process for preparing a low molecular weight olefin (co)polymer having a narrow molecular weight distribution with high productivity, by polymerizing or...
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7229943 |
Polymerisation and oligomerisation catalysts
A polymerisation catalyst comprising (1) a transition metal compound of Formula A,
and optionally (2) an activating quantity of a Lewis acid activator. Z is a five-membered heterocyclic group...
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7223822 |
Multiple catalyst and reactor system for olefin polymerization and polymers produced therefrom
Disclosed is a process for producing branched polymers including at least 50 mol % C 3 –C 40 olefins. The process may include: (1) feeding a first catalyst, an activator, and one or more C 2...
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