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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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7589160 |
Process for preparing 1-butene polymers
A process for obtaining 1-butene polymers comprising the step of contacting under polymerization conditions 1-butene and optionally ethylene, propylene or said alpha-olefin, in the presence of a...
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7582712 |
Alpha-olefins polymerization catalyst
Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a...
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7514509 |
Catalyst compositions and methods of forming isotactic polyproyplene
Olefin polymerization processes are described herein. In one embodiment, the process generally includes introducing propylene monomer to a reaction zone, disposing an isospecific metallocene...
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7473751 |
Biaxially-oriented metallocene-based polypropylene films having reduced thickness
A polymer film having a thickness of 10 microns or less and improved barrier characteristics to both water vapor and oxygen is formed from a biaxially-oriented polypropylene film of isotactic...
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7459510 |
Polymerization process
This invention relates to a process to polymerize olefins comprising contacting, in a reactor, a pyridyl-di-imine compound and an activator with one or more olefin monomer(s) in the presence of a...
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7449527 |
Polyolefin production
Provided is a process for producing a polyolefin having a multimodal molecular weight distribution, which process comprises: (a) polymerizing a first olefin monomer in the presence of an...
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7375169 |
Method for catalyst preparation and improved polyethylene blow molding resin
A method for polymerizing ethylene is provided. The method can include preparing a supported catalyst composition comprising the steps of: (a) dehydrating a chromium impregnated support; (b) at...
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7312283 |
Polymerization catalysts and process for producing bimodal polymers in a single reactor
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such...
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7309747 |
Highly flowable 1-butene polymer and process for producing the same
A 1-butene polymer satisfying the following (1), (2) and either (3) or (3′): a process for producing the polymer; a resin modifier comprising the polymer; and a hot-melt adhesive containing the...
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7273914 |
Olefin polymerization methods
Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay...
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7259215 |
Process for producing propylene/ethylene block copolymer and propylene/ethylene block copolymer
A process for producing a propylene-ethylene block copolymer in a good morphology using a catalyst system comprising a metallocene catalyst (1) preparing high crystalline polypropylene, a...
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7256243 |
Silicon compound
The present invention provides a novel silicon compound represented by Formula (1) having a living radical polymerization initiating ability for addition-polymerizable monomers and a polymer...
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7250478 |
Silicon containing cyclopentadienyl ring for metallocene catalyst components
The present invention refers to a metallocene catalyst component for producing polyolefins according to formula (I) R″ s (CpR n ) g (CpR n ) M Q 3-g (I) or according to formula (II) R″(CpR n...
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7241849 |
Group III bridged metallocene based on cyclopentadienyl-fluorenyl ligands
The present invention discloses a metallocene catalyst component of formula (Flu-R″-Cp)M(η 3 -C 3 R′ 5 )(ether) n (I) wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a...
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7238758 |
Catalysts for polymerization or copolymerization of α-olefins, catalyst components thereof, and processes for polymerization of α-olefins with the catalysts
The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for...
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7214745 |
Process for producing polymer
A process for producing an olefin polymer with high polymerization activity without using an expensive co-catalyst or using a limited amount of the co-catalyst, more particularly a process for...
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7211613 |
Hydrophobically modified clay polymer nanocomposites
The present invention is directed, in part, to improved nanocomposite compositions and processes for preparing same. Specifically, in one embodiment, there is provided a process for preparing an...
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7202313 |
Chromium-based catalysts in mineral oil for production of polyethylene
A process for polymerizing polyethylene with chromium-based catalysts wherein one or more supported chromium-based catalysts is mixed with mineral oil to form a slurry and the slurry is then...
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7196152 |
Modified Ziegler catalyst, process for preparing it and process for preparing poly-1-olefins in its presence
The invention relates to a modified Ziegler catalyst for preparing a poly-1-olefin in suspension, in solution or in the gas phase, which catalyst comprises the reaction product of a magnesium...
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7193099 |
Racemoselective preparation of isolable ansa-metallocene biphenoxide complexes
The invention relates to a process for preparing racemic metallocene biphenoxide complexes by reacting bridged transition metal complexes with cyclopentadienyl derivatives of alkali metals or...
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7189789 |
Curable fluoropolyether composition and rubber article
A curable fluoropolyether composition comprising (A) a fluoropolyether compound containing alkenyl radicals and having a fluorine content of at least 40% by weight, (B) a curing agent in the form...
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7169729 |
Use of zinc derivatives as cyclic ester polymerization catalysts
The invention concerns the use of zinc derivatives of general formula (I) wherein: L 1 represents a group of formula: —E 14 (R 14 )(R′ 14 )(R″ 14 ), —E 15 (R 15 ) (R′ 15 ) or —E 16 (R...
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7157522 |
Alpha-olefin/propylene copolymers and their use
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7148302 |
Catalyst for polymerization of norbornene
This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing...
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7141634 |
Catalyst for olefin polymerization and process for polymerizing olefins
A catalyst for olefin polymerization comprising (A) a solid catalyst component which is prepared by causing (a) a magnesium compound, (b) a tetravalent titanium halide compound, and (c) an electron...
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7141632 |
Mixed metallocene catalyst systems containing a poor comonomer incorporator and a good comonomer incorporator
The present invention provides polymerization catalyst compounds, catalyst systems including these catalyst compounds, and to their use in the polymerization of ethylene and at least one comonomer....
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7135544 |
Living olefin polymerization processes
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...
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7129305 |
Heterocyclic-amide catalyst compositions for the polymerization of olefins
A family of novel hetrocyclic-amide type catalyst precursors useful for the polymerization of olefins, such as ethylene, higher alpha-olefins, dienes, and mixtures thereof.
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7122603 |
Alpha-Olefin/propylene copolymers and their use
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7119153 |
Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength
This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum...
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7119043 |
Olefin polymerization processes and products thereof
A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems...
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7109277 |
Polymerization catalysts
A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha...
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7105609 |
Alpha-olefin/propylene copolymers and their use
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7091272 |
Olefin polymerization with pyridine moiety-containing single-site catalysts
An olefin polymerization process is disclosed. The polymerization is performed in the presence of a clay, an activator, and a transition metal complex that has at least one pyridine...
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7087773 |
Group 4 metal complexes containing 4-aryl-substituted, tricyclic indenyl derivatives
Group 4 metal constrained geometry complexes comprising tricyclic 4-arylsubstituted indenyl ligands, especially 1,5,6,7-tetrahydro-4-aryl-s-indacen-1-yl ligands, catalytic derivatives thereof,...
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7084218 |
Thermoplastic polymer blends of isotactic polypropylene and alpha-olefin/propylene copolymers
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7074863 |
Metallocene catalysts containing an idenyl moiety substituted at the 4,-5,-6- or 7-position by a siloxy or germyloxy group
A metallocene catalyst in which the metal is coordinated by a η5 cyclopentadienyl ligand which forms part of an indenyl or indenyloid moiety, characterized in that said moiety is directly or...
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7067610 |
Method for producing polycarbonate
An integrated method for producing aromatic polycarbonate, including the steps of:
(1) making a liquid mixture of acetone and diphenylcarbonate; (2) transporting the liquid mixture of step (1) to...
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7060767 |
Supported metallocene catalytic component and method for obtaining same
The invention discloses a solid catalytic component comprising a metallocene, at least one first ligand of which comprises a cyclopentadienyl group chemically bonded via a methyl group to a support...
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7056995 |
Catalyst System for the trimerization of olefins
The invention relates to a catalyst system for the selective trimerization of olefins, which system is based on a titanium complex of formula (Cp-B(R) n Ar)TiR 1 3 , wherein:
Cp is a...
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7056994 |
Catalyst composition
The present invention relates to a catalyst composition for polymerization of a conjugated diene, comprising: (A) a metallocene-type complex represented by a general formula (I): (C 5 R 1 R 2 R 3 R...
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7056993 |
Process for producing propylene alpha-olefin polymers
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7056992 |
Propylene alpha-olefin polymers
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7053164 |
Thermoplastic polymer blends of isotactic polypropropylene and alpha-olefin/propylene copolymers
Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable...
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7037872 |
Metallocene catalysts containing a cyclopentadienyl ligand substituted by a siloxy or germiloxy group containing an olefinic residue
The invention relates to a metallocene catalyst in which the metal is coordinated by any η 5 cyclopentadienyl ligand characterised in that said ligand is directly or indirectly substituted by a...
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7022782 |
Homogeneous type solid catalyst component or homogeneous type solid catalyst, process for production thereof and process for producing addition polymer with the same
A process for producing a homogeneous type solid catalyst component or a homogeneous type solid catalyst comprising a step for removing a fine-powdery component and/or a shapeless component...
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7022771 |
Olefin copolymers containing cyclopropane rings in the main chain
The invention relates to copolymers of alkenes and conjugated dienes containing cyclopropane and cyclopentane rings in the main chain. These copolymers are charachterised in that the amount of...
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6995216 |
Process for manufacturing single-site polyolefins
A dual olefin polymerization process is disclosed. The process uses a bridged indenoindolyl ligand-containing Group 4 transition metal complex and an activator. It is carried out in multiple stages...
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6992204 |
Method for the selective production of racemic metallocene complexes
The invention relates to a method for producing racemic metallocene complexes by reacting bridged or non-bridged transition metal complexes with cyclopentadienyl derivatives of alkaline or alkaline...
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