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7638586 |
Olefin polymerization process
A process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in a slurry reaction in the presence of a catalyst system which comprises an activator and an...
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7635739 |
Substantially linear polymers and methods of making and using same
Copolymers and terpolymers containing acyclic aliphatic olefin derived units and polar monomer derived units are disclosed. Also disclosed are methods of making such copolymers and terpolymers...
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7605105 |
Transition metal polymerization catalysts, their synthesis and use in olefin polymerization
A transition metal ligand complex has the following formula:
wherein R 1 and R 2 (each occurrence) independently represent an aryl, alkyl, or cycloalkyl group having up to 20 carbon atoms; R...
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7598330 |
Cross-metathesis of olefins directly substituted with an electron-withdrawing group using transition metal carbene catalysts
The invention pertains to the use of Group 8 transition metal alkylidene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes...
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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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7598329 |
Process for manufacturing ultra high molecular weight polymers using novel bridged metallocene catalysts
The present invention relates to a process for manufacturing ultra high molecular weight polymers by means of polymerization and co-polymerization of olefins using novel bridged metallocene...
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7598328 |
Supported catalysts for manufacture of polymers
A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising:
...
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7579416 |
Catalyst system for olefin polymerization
The present invention relates to a catalyst system for olefin polymerization comprising an organic transition metal compound and, as cocatalyst, an ionic compound made up of anions of the formula...
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7579417 |
Metallocene compounds
A metallocene compound of formula (I) wherein: M is an atom of a transition metal; X, same or different, is a hydrogen atom, a halogen atom, or a R, OR, OSO 2 CF 3 , OCOR, SR, NR 2 or PR 2 group,...
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7569648 |
Process for the copolymerization of ethylene
A process for producing a polymer of ethylene containing from 0.1 to 50% by weight of one or more derived units of alpha-olefins fo formula CH 2 ═CHR, wherein R is a C 2 -C 20 alkyl radical,...
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7569646 |
Group IVB transition metal compounds
The invention is a Group IVB transition metal compound which may be employed in the polymerization of olefins to produce high molecular weight polymers.
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7566677 |
De-foaming spray dried catalyst slurries
A method for preparing a spray dried catalyst and a low viscosity, low foam spray dried catalyst system for olefin polymerization are provided. In one aspect, the method includes preparing a...
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7566761 |
Olefin polymer and process for preparing the same
The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the...
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7566760 |
Preparation of aqueous polymer dispersions
The invention relates to a method for the production of aqueous polymer dispersions, by the polymerisation of one or more olefins in aqueous media in the presence of dispersing agents and...
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7557171 |
Halogen substituted metallocene compounds for olefin polymerization
A metallocene compound comprising a transition metal, a first substituted or unsubstituted indenyl or fluorenyl ligand pi—bonded to the transition metal, a second monoanionic ligand bonded to the...
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7547783 |
Transition metal complexes
A transition metal complex which is a bis-arylimine pyridine MX n complex or a [bis-arylimine pyridine MXp+][NC−]q complex comprising a bis-arylimine pyridine ligand and M is a transition metal...
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7544749 |
Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins
A catalyst system obtained by reacting at least one chiral transition metal compound and at least one cocatalyst, where the chiral transition metal compound is a transition metal compound of...
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7541412 |
Process for preparation of polyolefins via degenerative transfer polymerization
Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst with a substoichiometric amount of a co-catalyst; adding a first olefin monomer; and...
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7541413 |
Olefin polymerization catalysts, their synthesis and use
A catalyst system for the polymerization or copolymerization of α-olefins comprises a bis(imino)pyridyl complex of a transition metal on a support having an aluminum halide and/or an alkylaluminum...
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7538173 |
Polyolefin compositions
Ethylene copolymers valuable for films, coatings, sheets, and molded articles are disclosed. Some of the copolymers have a long-chain-branching index from 0.25 to 0.60 and a gpcBR index from 0.1 to...
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7534842 |
Catalysts for olefin polymerization
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a...
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7534841 |
1-butene polymer and process for the preparation thereof
A 1-butene polymer optionally containing from 0 to 30% by mol of derived units of ethylene, propylene or alpha-olefin of formula CH2═CHZ, wherein Z is a C 3 -C 20 linear or branched alkyl...
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7531602 |
Polymer blends
A blend of polymers comprising from 5 to 95 weight % of a polymer having a high molecular weight made using a single site type catalyst and from 95 to 5 weight % of a polymer having a lower...
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7531608 |
Transition metal complexes, catalyst compositions containing the same, and olefin polymerization using the catalyst compositions
Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amine-based group is introduced is coordinated, a method of synthesizing the same, and olefin...
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7524905 |
Substantially linear copolymers and methods of making the same
Substantially linear copolymers derived from at least one acyclic aliphatic olefin monomer and at least one nitrogen containing vinyl monomer, wherein the at least one nitrogen containing vinyl...
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7524912 |
Preparation of linear ethylene-acrylate copolymers with palladium catalysts and free radical scavengers
A polymerizable composition including a late transition metal complex, a non-polar olefin, a polar olefin, and a free radical scavenger, wherein the polymerizable composition is capable of forming...
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7524913 |
Functionalized poly(4-methyl-1-pentene)
An olefin polymer having greater than 95 percent chain end unsaturation, where greater than 80 percent of said unsaturation comprises a 1,2-disubstituted olefinic unsaturation, especially polymers...
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7517940 |
Catalyst composition including transition metal complexes and olefin polymerization using the same
Provided is catalyst composition including a transition metal complex precatalyst represented by Formula 1; a first cocatalyst represented by Formula 2 which is an alkylaluminum compound; and a...
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7514386 |
Chlorinated promoters for vanadium-based polymerization catalysts
Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM)...
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7507786 |
Decolorization of oligomers
Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of cobalt-complexed tetraphenyl porphyrin derivatives and decolorization of the produced...
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7504465 |
Linear functional copolymers of ethylene with precise and minimum run length distributions and methods of making thereof
The present invention is related to a linear functional polymer having repeating units A, B and D. Unit A represents —CH 2 —, unit B represents
and unit D represents
where R 1 ...
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7482412 |
Process for manufacturing cycloolefin addition polymer
A process for manufacturing a cycloolefin addition polymer includes polymerizing monomers containing a cycloolefin compound using a catalyst containing a nickel compound or a palladium compound by...
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7479531 |
Olefin polymerization catalyst system useful for polar monomers
This invention relates to copolymers produced by a polymerization method comprising contacting at least one olefin monomer, at least one polar monomer, an optional activator, and a catalyst...
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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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7473745 |
Preparation of multimodal polyethylene
Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in...
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7470762 |
Living radical polymerization of acrylic monomers and the formation of block copolymers therefrom
Acrylic polymers are made by the living radical polymerization of acrylic monomers utilizing organo halide initiators with either metal-free or metal catalysts. Moreover, block copolymers of vinyl...
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7459511 |
Process for the polymerization of 1-butene
A process for polymerizing 1-butene comprising the step of contacting under polymerization conditions 1-butene and optionally from 0 to 20% by mol of an alpha olefin with a catalyst system...
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7452946 |
Ethylene polymer
An ethylene-based polymer which is a copolymer obtained from ethylene and a C3 to C10α-olefin and satisfies the following requirements (i), (ii), (iii) and (iv) simultaneously provides a...
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7446073 |
Catalyst compounds, catalyst systems thereof and their use in a polymerization process
The present invention relates to a cyclic germanium bridged bulky ligand metallocene-type catalyst compound, a catalyst system thereof, and to its use in a process for polymerizing olefin(s) to...
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7442819 |
Catalysts for olefin polymerization or oligomerization
Novel iron and cobalt complexes of certain novel tricyclic ligands containing a “pyridine” ring and substituted with two imino groups are polymerization and/or oligomerization catalysts for...
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7442750 |
Supported olefin polymerization catalyst
Supported catalyst systems are provided comprising (a) a transition metal compound, (b) an activator comprising (iii) an aluminoxane or (iv) a Group lilA metal or metalloid compound, and (c) a...
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7439314 |
Catalysts for olefin polymerization
Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition...
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7429635 |
Preparation of ultra high molecular weight linear low density polyethylene
Disclosed is a method of preparing an ultra-high molecular weight, linear low density polyethylene with a catalyst system that comprises a bridged indenoindolyl transition metal complex, a...
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7423098 |
Polyethylene process
An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C 6 -C 10 alpha-olefin in the presence of a single-site catalyst capable of making a...
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7423101 |
Catalyst composition and use thereof
The present invention is directed toward Group 4, 5, 6, 7, 8, 9, 10 or 11 transition metal compounds containing neutral, mono- or di-anionic tridentate nitrogen/oxygen based ligands that are...
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7417098 |
Method for emulsion polymerisation of olefins
Process for the emulsion polymerization of one or more olefins by reacting a quinoid compound with a metal compound and a phosphine compound which is substituted by at least one polar radical and...
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7414099 |
Hindered polyalicyclic alkyl catalysts and their use in a gas-phase polymerization reactor
Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic...
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7399874 |
Catalyst compound containing divalent tridentate ligand
This invention relates to a catalyst compound represented by the formula:
wherein:
M is a Group 3 to 12 transition metal; each R a is, independently, a hydrogen, a hydrocarbyl group, a...
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7390861 |
Cationic group-3 catalyst system
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic multidentate ancillary ligand and two...
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7387980 |
Methods of using heterocycle-amine ligands, compositions, complexes, and catalysts
Ligands, compositions, and metal-ligand complexes that incorporate heterocycle-amine compounds are disclosed that are useful in the catalysis of transformations such as the polymerization of...
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