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7157534 |
Polymerization process for producing copolymers
The invention provides a process for the preparation of a propylene polymer in which propylene and a comonomer copolymerizable therewith and of greater molecular weight than propylene are...
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7157591 |
Metallocenes and catalyst compositions derived therefrom
Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula:
wherein M 1 preferably is zirconium or hafnium; and R 5 is...
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7148173 |
Catalytic systems for the polymerization and copolymerization of alpha-olefins
Heterogeneous catalytic compositions obtained by reacting a porous inorganic support with an alumoxane and subsequently supporting at least one metallocene compound thereon. A process for...
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7148299 |
Polymerization catalyst
The present invention relates to a catalyst for polymerization of a conjugated diene or the like, which is composed of a metallocene-type cation complex of a gadolinium compound. Examples of such...
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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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7141527 |
Catalyst system and process for the polymerization of olefins
A catalyst system for the polymerization of olefins comprising the product obtained by contacting:
(A) a metallocene complex; (B) an organometallic aluminium compound of formula (II):
...
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7141690 |
Transition metal complexes, ligands, polymerization catalysts for olefins, and process for production of olefin polymers
A transition metal complex represented by the formula (1):
wherein M is a Group 4 transition metal, A is a Group 16 element, B is a Group 14 element, n is an integer of 0 or 1, R 1 , R 2 , R 3 ...
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7141637 |
Metallocene compounds and process for the preparation of propylene polymers
A metallocene compound of formula (I) wherein M is zirconium, hafnium or titanium; X is hydrogen, halogen, or a hydrocarbyl radical optionally containing heteroatoms; R 2 , R 3 , R 4 and R 5 , are...
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7141630 |
Methods of feed purification for olefin polymerization
A polymerization process is provided. For example, a polymerization process is described, including contacting olefin monomers with a supported metallocene catalyst to polymerize the olefin...
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7141639 |
Ethylene copolymer
An object of the present invention is to provide an ethylene-α-olefin copolymer excellent in extrusion molding processability and in the balance between the appearance and impact strength. This...
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7138474 |
End use articles derived from polypropylene homopolymers and random copolymers
Articles of manufacture and a method of making the articles are provided. The articles of manufacture comprise CpFlu metallocene catalyzed polypropylene homopolymers and C 2 –C 3 random...
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7132486 |
Linear low density polyethylenes with high melt strength and high melt index ratio
Linear low density polyethylenes (LLDPEs) that have relatively high melt index ratios (MIR) and relatively high melt strength (MS) are described. This combination of melt properties is achieved by...
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7129197 |
Synthesis of poly-alpha olefin and use thereof
One or more oligomers of an olefin are prepared in the presence of a single-site catalyst. Preferably, the olefin is an α-olefin, and the oligomers are a poly-alpha-olefin (PAO). The PAO so...
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7129302 |
Bimetallic catalyst for producing polyethylene resins with bimodal molecular weight distribution, its preparation and use
Bimetallic catalyst for producing polyethylene resins with a bimodal molecular weight distribution, its preparation and use. The catalyst is obtainable by a process which includes contacting a...
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7129306 |
Process for the oligomerization of α-olefins having low unsaturation
A process is disclosed for the preparation of a poly(α-olefin) polymer wherein the process comprises polymerizing at least one α-olefin in the presence of hydrogen and a catalytically effective...
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7127853 |
Process for producing polyethylene pipe resins
A polyethylene resin comprising from 35 to 49 wt. % of a first polyethylene fraction of high molecular weight and from 51 to 65 wt. % of a second polyethylene fraction of low molecular weight, the...
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7125937 |
Polyorganosilsesquioxane supported metallocene catalysts
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to...
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7122498 |
Metallocenes and catalyst compositions derived therefrom
Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula:
wherein M 1 preferably is zirconium or hafnium; and R 12...
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7119158 |
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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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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7115763 |
Polymerization of olefins
Olefins are polymerized by novel transition metal complexes of selected iminocarboxylate and iminoamido ligands, sometimes in the presence of cocatalysts such as alkylaluminum compounds or neutral...
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7115539 |
Metal compound, and catalyst component and catalyst for addition polymerization, and process for producing addition polymer
A metal compound obtained by a process comprising the step of contacting, in a specific ratio, a compound represented by the formula M 1 L 1 r , a compound represented by the formula R 1 s−1 TH,...
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7115694 |
Propylene-based polymer
An object of the present invention is to provide a novel propylene-based polymer capable of providing a propylene-based polymer with a good adhesion and coatability. The present invention lies in a...
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7112638 |
Hetero cyclic metallocene compounds and use thereof in catalyst system for producing olefin polymers
A metallocene compound of general formula (I): LGZMXp, wherein L is a divalent group, Z is a moiety of formula (II), wherein R 3 and R 4 are selected from hydrogen and hydrocarbon groups; A and B...
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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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7109278 |
Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and preparation of polyolefins
Organometallic transition metal compounds of the formula (I) where M 1 is an element of group 3, 4, 5 or 6 of the Periodic Table of the Elements or the lanthanides; X are identical or different...
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7101940 |
Chemical compound, method for the production thereof and its use in catalyst systems for producing polyolefins
The invention relates to a chemical compound of formula (I), wherein M 1 represents an element selected from main groups II, III or IV of the periodic table of elements; x is equal to 1, 2, 3 or...
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7102047 |
High metathesis activity ruthenium and osmium metal carbene complexes
Ruthenium and osmium carbene compounds that are stable in the presence of a variety of functional groups and can be used to catalyze olefin metathesis reactions on unstrained cyclic and acyclic...
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7098278 |
Olefin polymerization catalyst and polymerization process
A polymerization catalyst for the polymerization and copolymerization of olefin monomers and the copolymerization of olefin monomers with other monomers selected from, for example, norbornenes and...
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7098354 |
Racemoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indeyl)zirconium compounds
The present invention relates to a specific process for the diastereoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indenyl)zirconium compounds of the formula I,
by reacting the...
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7098356 |
Substituted indenyl metal complexes and polymerization process
Metal complexes comprising a substituted inden-1-yl group or hydrogenated or partially hydrogenated derivative thereof, said group being substituted at least at the 2-position thereof with a C 4-30...
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7098277 |
Polypropylene films
The present invention provides isotactic polypropylene compositions suitable for cast film applications, cast polypropylene films made therefrom, and processes for forming such films. The novel...
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7094724 |
Catalytic solid supported on calcined hydrotalcite for olefinic polymerisation
Catalyst solid for olefin polymerization comprising
A) at least one calcined hydrotalcite and B) at least one organic transition metal compound,
and also a catalyst system comprising the...
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7094854 |
Ethylene/butadiene copolymers, catalytic system and process for the synthesis thereof
Disclosed are ethylene and butadiene copolymers and a catalytic system usable for the synthesis of these copolymers. The copolymers have a molar content of units resulting from butadiene of ≧8%,...
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7094726 |
Catalyst composition and process for olefin polymerization and copolymerization using supported metallocene catalyst systems
A catalyst composition includes: A) a solid catalyst precursor containing a metallocene compound, a magnesium compound and a particulate polymeric material; and B) a cocatalyst containing aluminum...
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7094847 |
Metallocene compounds and use thereof in catalysts for the polymerization of olefins
A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8...
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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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7087686 |
Chain growth reaction process
A process is disclosed for the preparation of zinc alkyl chain growth products via a catalysed chain growth reaction of an alpha-olefin on a zinc alkyl, wherein the chain growth catalyst system...
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7084220 |
Catalyst system for preparing styrene polymer and method for preparing of styrene polymer using the same
The present invention relates to a catalyst system for preparing styrene polymer and a method of preparing styrene polymer using the same, more particularly to a catalyst system for preparing...
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7084219 |
Contact product, and catalyst component and catalyst for addition polymerization, and process for producing addition polymer
A contact product obtained by a process comprising the step of contacting a compound (a) represented by the formula, M 1 L 1 r , a compound (b) represented by the formula, R 1 s-1 T 1 H, a compound...
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7084221 |
Polymerization catalyst system containing polyether-modified aluminoxane
A modified aluminoxane is disclosed. Aluminoxane compounds are modified with glycol ethers or polyethers. The modified aluminoxanes are effective activators for single-site catalysts. Catalyst...
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7081505 |
Activating organometallic composition for the (co) polymerization of alpha-olefins comprising fluorinated cyclopentadienyl compounds
An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of α-olefins, comprises: (A) a fluorinated di-unsaturated cyclic...
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7078467 |
Single catalyst low, medium and high density polyethylenes
A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a...
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7078469 |
Halogenated organic particles for catalyst supports
Polymeric supports, which have been treated with a halosulfonic acid, increase the activity of single-site catalysts used with aluminoxane co-catalysts, resulting in improved ethylene...
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7077977 |
Bulky borate activations
A discrete polyolefin catalyst activator is disclosed. A salient feature of invention borate-based activators is that at least one of the ligands on the borate non-coordinating anion (NCA)...
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7074736 |
Hydrozirconated matrix and process for polyolefin production
A hydrozirconated matrix for the production of polyolefins is disclosed. The hydrozirconated matrix is prepared from the reaction of an organozirconium composition and an olefin based material. A...
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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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RE39156 |
Process for the preparation of polyolefins
A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R a —CH═CH—R b , in which R a and R b are identical or different and are...
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7067604 |
1-butene polymer and molded product consisting of the polymer
1-butene based polymer satisfying following requirements (1″) to (4″) provides formed product having low stickiness, superior flexibility and transparency.
(1″) Crystalline resin having...
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7067603 |
Adhesive alpha-olefin inter-polymers
The invention relates to novel adhesive alpha-olefin inter-polymers which are largely amorphous and have a rheological behavior that makes them suitable for adhesive use, both without and with...
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