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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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7241903 |
Metallocenes, use in catalyst system for producing olefin polymers
A metallocene compound of formula (I): wherein M is zirconium, titanium and hafnium; X is a hydrogen atom, a halogen atom or a hydrocarbon radical; R 1 is a linear C 1 -C 20 -alkyl radical; R 2 ...
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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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7238759 |
Isotactic propylene copolymers, their preparation and use
Unique copolymers comprising propylene, ethylene and/or one or more unsaturated comonomers are characterized as having: at least one, preferably more than one, of the following properties: (i) 13...
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7238819 |
Process for preparing isobutylene-based polymers
This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal...
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7235614 |
Methods for injecting catalyst into a polymerization reactor
A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene...
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7232871 |
Propylene ethylene polymers and production process
Ethylene propylene copolymers, substantially free of diene, are described. The copolymers will have a uniform distribution of both tacticity and comonomer between copolymer chains. Further, the...
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7230128 |
Organometallic fluorenyl compounds, preparations, and use
Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition,...
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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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7223824 |
Multinuclear transition metal compound and catalyst system including the same
A multinuclear transition metal compound which has two or more catalytic active sites, and is useful in preparing the olefin polymer and copolymer, is disclosed. The multinuclear transition metal...
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7220805 |
Process for producing contact product; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer
There are provided (1) a process for producing a contact product, which comprises the step of contacting at least a phthalocyanine complex, a porphyrin complex, or their combination with a...
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7220695 |
Supported activator
This invention relates to supported activators comprising the product of the combination of an ion-exchange layered silicate, an organoaluminum compound, and a heterocyclic compound, which may be...
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7220804 |
Method for preparing a catalyst system and its use in a polymerization process
The present invention relates to a supported catalyst composition and a method for making the supported catalyst composition and its use in a process for polymerizing olefin(s). In particular, the...
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7214749 |
Catalyst system for high activity and stereoselectivity in the homopolymerization and copolymerization of olefins
The present invention is directed to a novel composition, and to a method of making the composition, the composition being useful in catalyst systems for the homopolymerization and/or...
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7214638 |
Olefin polymerization catalyst composition comprising group 13 amide derivatives
Catalyst compositions that are highly tolerant of catalyst poisons for use in addition polymerizations comprising a catalytic derivative of a Group 4 metal complex, a cocatalyst, and a Group 13...
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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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7214746 |
Phosphorus bridged metallocene compounds for olefin polymerization
This invention relates to metallocene compounds represented by formula:
wherein
M is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; E is a...
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7214755 |
Crystalline polymer of higher α-olefin and process for producing the same
A crystalline higher α-olefin polymer which is obtained from a C 10 or more α-olefin and satisfies either (1) the melting point (Tm) as measured with a differential scanning calorimeter (DSC) is...
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7211537 |
Modified aluminum oxy compound, polymerization catalyst and process for producing olefin polymer and alkenyl aromatic hydrocarbon polymer
A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the...
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7208559 |
Ethylened polymer and molded object obtained therefrom
An ethylene-based polymer which is an ethylene/C4 to C10 α-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C....
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7205364 |
Olefin polymerization catalysts
The invention is a catalyst system including a Group IV B transition metal component and an alumoxane component which may be employed to polymerize olefins to produce a high molecular weight polymer.
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7205363 |
Polymerization processes using antistatic agents
The invention relates to a process for the polymerization of olefins using an antistatic agent. In particular, the invention relates to a polymerization process to produce propylene polymers using...
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7205427 |
Cross-coupling synthesis of alkyl (dialkylphenyl) indenes
A cross-coupling synthesis of 2-alkyl-4-(2,6-dialkylphenyl)indenes is described. A 2-alkylidene is treated with a dialkylboronic acid in the presence of a catalyst. A feature of the invention is...
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7205371 |
Blends made from propylene ethylene polymers
Polymer blend compositions of a first polymer component comprising an ethylene propylene copolymer and a second polymer component comprising an isotactic polypropylene copolymer. The first polymer...
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RE39561 |
Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts
The novel metallocenes of the formula I
in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, —(CR 8 R...
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7202190 |
Supported catalyst system for the polymerization of olefins
A supported catalyst system for polymerizing olefins comprising a) a support, b) a Lewis base of the formula
M 3 R 6 R 7 R 8 ...
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7199072 |
Process of producing a supported mixed catalyst system and polyolefins therefrom
A process for preparing a mixed catalyst compound used in the polymerization of polyolefins to produce bimodal polyethylenes is disclosed. In an embodiment, a process of preparing the mixed...
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7199073 |
Resins that yield low haze films and the process for their production
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are...
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7196148 |
Cationic catalyst system
A 3+ metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by a anionic multidentate ligand and at least two monoanionic ligands. The...
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7196031 |
Catalyst composition
A catalyst composition for polymerization of a conjugated diene or copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises the following components: (A) a...
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7193025 |
Metallocene polypropylene for rotomoulding
The present invention is concerned with single layer articles produced by rotomoulding and consisting essentially of metallocene-produced syndiotactic polypropylene or isotactic random copolymer of...
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7192902 |
Polymerization process with mixed catalyst compositions
The application describes a mixed olefin polymerization catalyst composition comprising a support, a reaction product of at least one first organometallic compound and a first activator capable of...
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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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7189790 |
Catalyst component for olefin polymerization, catalyst for α-olefin polymerization and process for the production of α-olefin polymer
To develop a catalyst component for olefin polymerization, a metallocene catalyst for olefin polymerization and a process for the production of an olefin polymer capable of producing an olefin...
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7186667 |
Catalyst component and catalyst for addition polymerization, and process for producing addition polymer
A catalyst component obtained by a process comprising contacting (a), (b) and (c) described below, a catalyst for addition polymerization using the catalyst component, and a process for producing...
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7183332 |
Process for the preparation of porous polymers and polymers obtainable thereof
A process for preparing porous olefin polymers comprising bringing into contact in a polymerization reactor, at a temperature T 1 , one or more olefins of the formula (I) CH 2 ═CHR 1 , R 1 being...
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7179876 |
High tear films from hafnocene catalyzed polyethylenes
A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater...
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7176266 |
Catalyst for vinyl compound polymerization and process for producing vinyl polymer
A catalyst for polymerizing vinyl compounds or α-olefins according to the present invention includes (A) a transition metal complex, (B) a clay, clay mineral or ion-exchangeable layered compound,...
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7173099 |
Propylene polymers and resin composition and molding containing the polymers
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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7169865 |
Transition metal compounds having a donor-acceptor interaction and a specific substitution pattern
The present invention relates to compounds in which a transition metal is complexed by at least two ligand systems and at least two of the systems are reversibly joined to one another by at least...
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7169866 |
Process for preparing homopolymers, copolymers and/or block copolymers by living polymerization with metallocenes having a donor-acceptor interaction
The present invention relates to a process for preparing homopolymers, copolymers and/or block copolymers of 1-olefins by living polymerization, to the use of the homopolymers, copolymers and/or...
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7166682 |
Process to prepare a particulated metallocene catalyst with a modified aluminoxane and use in polymerization of olefins
A process for the preparation of an olefin polymerisation catalyst comprising: a) reacting an aluminoxane and a Lewis base in an optionally halogenated hydrocarbon solvent to form a particulate...
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7166676 |
Process for preparing copolymers and blend compositions containing the same
A process for the preparation of blends including an ethylene copolymer by copolymerizing ethylene and at least one comonomer selected from a compound represented by the formula H 2 C═CHR wherein...
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7166684 |
Transition metal compound, catalyst for olefin polymerization and method for producing polyolefin
A novel transition metal compound wherein the transition metal belongs to group 4 of the periodic table and the transition metal compound has a hydrogen atom ligand and three cyclopentadienyl...
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7163989 |
Processes and apparatus for continuous solution polymerization
This invention relates to processes and plants for continuous solution polymerization. Such plan and process include a pressure source, a polymerization reactor, downstream of said pressure source,...
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7160965 |
Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts
A catalyst system useful to polymerize and co-polymerize polar and non-polar olefin monomers is formed by in situ reduction with a reducing agent of a catalyst precursor comprising
...
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7157540 |
Olefinic polymer and process for producing the same
The olefinic polymer characterised in that the n-decane-soluble content thereof is 10% by weight or less and the content of a ligand having a cyclopentadienyl structure is 5 ppb by weight or less....
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7157531 |
Methods for producing polymers with control over composition distribution
Methods for controlling a melt viscosity of a polyolefin, controlling comonomer distribution of a polyolefin, achieving a targeted melt viscosity of a polyolefin, and films made from such...
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7157398 |
Covalently fixed nonmetallocenes, process for preparing them and their use for the polymerization of olefins
The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use thereof for polymerizing olefins.
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7157530 |
Catalyst system for controlled polymerization
Disclosed is a process for the removal and recycle of a supported transition metal catalyst complex from a polymerization reaction medium comprising the steps separating the supported transition...
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