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8173828 |
Halogen substituted heteroatom-containing metallocene compounds for olefin polymerization
Halogen substituted metallocene compounds are described and comprise one or more monocyclic or polycyclic ligands that are pi-bonded to the metal atom and include at least one halogen substituent...
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8168556 |
Racemoselective synthesis of ansa-metallocene compounds, ansa-metallocene compounds, catalysts comprising them, process for producing an olefin polymer by use of the catalysts, and olefin homo- and copolymers
A metallocene compound with the 4- and 7-positions on the indenyl moiety possessing large aromatic substituents is prepared in accordance with a method which produces substantially 100 percent...
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8153545 |
Process for homo—or copolymerization of conjugated olefins
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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8148482 |
Tactic polymer polymerization process using chiral catalysts
A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one...
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8143183 |
Nano-linked metallocene catalyst compositions and their polymer products
The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such...
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8143430 |
Nano-linked heteronuclear metallocene catalyst compositions and their polymer products
The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using...
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8138293 |
Process for preparing polymers from 3-methylbut-1-ene
The present invention relates to a copolymer which contains 3-methylbut-1-ene as a comonomer and which contains ethene or propene as a further monomer, the proportion of the incorporated...
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8138113 |
Dual metallocene catalysts for polymerization of bimodal polymers
This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in ...
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8133832 |
Catalyst system for polymerization of olefinic monomers, process for preparing polymers, and polymers prepared by the process
The present invention relates to new catalyst supports comprising nanofibers, a catalyst system comprising these supports as well as a process for preparing nanocomposites and the nanocomposites...
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8129487 |
Multi-block copolymer process using polar solvents
A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin...
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8119747 |
Interpolymers suitable for use in hot melt adhesives and processes to prepare the same
The present invention relates to an ethylene/α-olefin interpolymer product comprising at least one α-olefin interpolymerized with ethylene and, characterized in at least one aspect, as having i...
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8106137 |
Catalytic aluminum-free combination for polymerizing alpha-olefins and polymerization method using same
The invention concerns a novel catalytic combination for polymerizing alpha-olefins based on a titanium diamidide complex. The invention also concerns a method for polymerizing alpha-olefins using...
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8101695 |
Propylene based terpolymers
A propylene-based terpolymer comprising: a) from 10.0% by mol to 79.0% by mol of propylene derived units;b) from 89.5% by mol to 20.5% by mol of 1-butene derived units; andc) from 0.5% by mol to...
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8101696 |
Polyolefin solution polymerization process and polymer
A catalyst composition comprising a zirconium complex of a polyvalent aryloxyether and a polymerization processes employing the same, especially a continuous, solution polymerization of ethylene...
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8097682 |
1-butene propylene copolymer compositions
A 1-butene/propylene copolymer composition having a content of propylene derived units from 4 to 10% by weight, wherein at least 50% of the polymer is present in the thermodynamically stable,...
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8097681 |
1-butene propylene copolymer compositions
A 1-butene/propylene copolymer composition having a content of propylene derived units from 1 to 4% by weight, wherein at least 50% of the crystalline polymer is present in the thermodynamically...
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8088867 |
Multiple catalyst system for olefin polymerization and polymers produced therefrom
The invention relates to a polymer blend prepared by the process of combining under polymerization conditions: (A) a first catalyst capable of producing a first crystalline polymer having an Mw of...
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8084385 |
Catalysts for olefin polymerization
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a bridged cyclopentadienyl complex that incorporates a monoanionic hydroxylamido or hydrazido ligand...
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8080624 |
Propylene-based polymer, production method therefor, composition using the same, and application thereof
A propylene-based polymer which is suitably applicable to foam molding, sheet molding, blow molding or the like, because of having good flow characteristics, high melt tension, high swell ratio and...
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8076428 |
Ethylene copolymer having multiple pitch molecular weight distribution and the method of preparing the same
Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a...
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8067511 |
Ethylene copolymer and a method of preparing the same
Provided are ethylene copolymers and a process for preparing the same. More specifically, provided are ethylene copolymers exhibiting excellent processibility and physical properties due to its...
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8067652 |
Processes for controlling the viscosity of polyalphaolefins
The invention relates to a process for forming a polyalphaolefin, the process comprising the step of polymerizing at least one C8-C12 monomer, preferably a decene such as 1-decene, in the presence...
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RE42957 |
Process for producing olefin polymers
A process for producing an olefin polymer is provided, in which ethylene and at least one kind or more of monomers selected from α-olefins are polymerized by a high temperature solution ...
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8058372 |
Catalyst composition II
This invention relates to a transition metal catalyst compound represented by the formula: LMX2 or (LMX2)2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9, or 10...
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8058461 |
Mono-indenyl transition metal compounds and polymerization therewith
This invention relates to transition metal compounds, catalyst systems comprising said compounds and polymerization processes using such catalyst systems, where the transition metal compound is...
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8048973 |
Transition metal complex, catalyst composition including the same and olefin polymer using catalyst composition
Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin...
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8044155 |
Titanocene-based catalyst system
A catalyst system obtainable by the process comprising the steps of contacting an adduct of formula (I) MgT2.yAlQj(OR″)3-j (I) wherein T is chlorine, bromine, or iodine; R″ is a linear or bra...
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8034886 |
Process for manufacturing high to ultra high molecular weight polymers using novel bridged metallocene catalysts
The present invention relates to a process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers. Ethylene is reacted in the presence...
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8026324 |
Transition metal complex, process for producing the same, and use
A transition metal complex of the following formula (1): in which A represents an atom of Group 16 of the periodic table; B1 represents an atom of Group 14 of the periodic table; M1 represents a...
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8022005 |
Halogen substituted heterocyclic heteroatom containing ligands-alumoxane activation of metallocenes
This invention relates to an activator, catalyst system, and the use thereof. In one aspect, the catalyst system includes one or more polymerization catalysts and at least one activator. The...
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8017705 |
Process for production of syndiotactic propylene polymer
Disclosed is a method for producing a syndiotactic propylene polymer having a syndiotactic pentad fraction (rrrr fraction) of not less than 85%, a melting point (Tm) within the range of 145-170° ...
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8017541 |
Catalyst components based on ferrocenyl complexes used for olefin polymerisation
The present invention discloses catalyst components based on ferrocenyl ligands, their method of preparation and their use in the polymerization of olefins.
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8013086 |
Method for preparing elastomeric copolymers of ethylene and α-olefins
Provided is a process for preparing copolymers of ethylene with α-olefin. More specifically, provided are transition metal compound being useful as catalyst for preparing those copolymers, a ...
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8003739 |
Multi-component catalyst systems and polymerization processes for forming in-situ heterophasic copolymers and/or varying the xylene solubles content of polyolefins
Embodiments of the invention generally include multi-component catalyst systems, polymerization processes and heterophasic copolymers formed by the processes. The multi-component catalyst system...
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7977444 |
Process for polymerizaing 1-hexene or higher alpha-olefins
A process for preparing a polymer containing derived units of one or more alpha olefins of formula CH2═CHW wherein W is a C3-C10 hydrocarbon radical and optionally from 0 to 81% by mol of derived u...
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7972987 |
Fourth group transition metal compound having cyclopentadienyl ligand, method of preparing compound, and method of preparing olefin polymer using compound
The present invention relates to a novel cyclopentadienyl compound, a fourth group transition metal compound having the cyclopentadienyl compound, a method of preparing the fourth group transition...
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7973113 |
Transition metal catalyst systems and formation thereof
Catalyst systems and methods of forming the catalyst systems are described herein. The methods generally include contacting a support material with an activator to form a support composition,...
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7968660 |
Polymer-based composites comprising carbon nanotubes as a filler, method for producing said composites, and associated uses
This 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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7960487 |
Dual metallocene catalysts for polymerization of bimodal polymers
This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in ...
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7956148 |
Process for the preparation of polypropylene
The present invention relates to a process for the preparation of polypropylene using a catalyst system of low porosity, the catalyst system comprising an asymmetric catalyst, wherein the catalyst...
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7943716 |
Process for polymerizing 1-hexene or higher alpha-olefins
A process for preparing a polymer containing derived units of one or more alpha olefins of formula CH2═CHW wherein W is a C3-C10 hydrocarbon radical and optionally from 0 to 81% by mol of derived u...
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7943807 |
Controlling branch level and viscosity of polyalphaolefins with propene addition
The invention relates to a polyalphaolefin formed from a decene and propene and having a branch level greater than 19% and to a process for forming such polyalphaolefins. The invention also relates...
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7928256 |
Transition metal complex, catalyst composition including the same and olefin polymer using catalyst composition
Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin...
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7928173 |
Transition metal catalytic systems and methods for preparing ethylene homopolymers or copolymers of ethylene and α-olefins using the same
Provided are transition metal catalytic systems for preparing ethylene homopolymers or copolymers of ethylene with α-olefins. More specifically, provided are Group 4 transition metal catalysts, ...
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7919639 |
Nano-linked heteronuclear metallocene catalyst compositions and their polymer products
The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using...
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7919569 |
Process for the polymerizaion of olefins
The present invention relates to a process for the polymerization of olefins, comprising the steps of introducing at least one olefin, at least one polymerization catalyst, at least one cocatalyst...
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7915194 |
Process for homo- or copolymerization of conjugated olefins
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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7915367 |
Process for the manufacture of branched polypropylene
A process for manufacturing a branched polypropylene, said branched polypropylene having a branching index g′ of less than 1.00, the process comprising the step of polymerizing propylene and o...
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7915360 |
Supported catalyst for olefin polymerization using transition metal compound having phenylene-bridge, method for preparing the same, and method for preparing polyolefin using the same
The present invention provides a new supported catalyst for olefin polymerization prepared by reacting a novel transition metal compound on a cocatalyst-supported support, in which the transition...
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7910764 |
Polymethylaluminoxane preparation, method of producing the same, polymerization catalyst, and polymerization method of olefins
A polymethylaluminoxane preparation exhibiting excellent storage stability with a high yield is provided. A polymethylaluminoxane preparation is formed by thermal decomposition of an alkylaluminum...
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