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7605215 |
Process for producing olefin copolymerization catalyst and process for producing olefin copolymer
A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a...
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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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7547751 |
Process for the preparation of a polyolefin
The invention related to a process for the polymerization of at least one aliphatic C 2-20 or aromatic C 4-20 hydrocarbyl mono- or multiolefin in the presence of a catalyst and an aluminum...
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7473746 |
LTMC polymerization of unsaturated monomers
A process for polymerizing unsaturated monomers is disclosed. The process comprises polymerizing, in the presence of a late transition metal catalyst (LTMC), a variety of unsaturated monomers which...
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7408012 |
Adhesive bonding systems having adherence to low energy surfaces
This invention relates to (meth)acrylate-based polymerizable compositions and adhesive systems prepared therefrom, which include a alkylated borohydride or tetraalkyl borane metal or ammonium salt...
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7332609 |
PEG-substituted pyridine ligands and related water-soluble catalysts
Amphiphilic Group VIII metathesis catalysts, as can be used in a range of polymerization reactions and other chemical methodologies.
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7312284 |
Process for producing polar olefin copolymer and polar olefin copolymer obtained thereby
A process for producing a polar olefin copolymer comprises copolymerizing a non-polar olefin and a polar olefin in the presence of a transition metal compound selected from Groups 4, 5, 6 and 11 of...
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7307130 |
Polymerization reactor operability using static charge modifier agents
The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to...
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7285607 |
Polymerisation of olefinic compounds
This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by...
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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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7238756 |
Polymerization process and control of polymer composition properties
Methods of controlling the flow index and/or molecular weight split of a polymer composition are disclosed. The method of producing a polymer composition in one embodiment comprises incorporating a...
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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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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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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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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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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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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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7157399 |
Amine organoborane complex initiated polymerizable compositions containing siloxane polymerizable components
In one embodiment the invention is a polymerizable composition comprising a) an organoborane amine complex; b) one or more of monomers, oligomers or polymers having olefinic unsaturation which is...
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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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7122611 |
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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7122497 |
Olefin polymerization catalyst system
A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises a cocatalyst and a supported transition metal prepared from a halogen-containing Group 4–6 transition...
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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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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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7081504 |
Synthesis of 1,4-polybutadiene
This invention is based upon the unexpected discovery that alkylated diphenylamines can be used in conjunction with nickel based catalyst systems which contain (a) an organonickel compound, (b) an...
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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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7053159 |
Process for producing polar olefin copolymer and polar olefin copolymer obtained thereby
A process for producing a polar olefin copolymer comprises copolymerizing a non-polar olefin and a polar olefin in the presence of a transition metal compound selected from Groups 4, 5, 6 and 11 of...
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7022792 |
Initiation of polymerization by hydrogen atom donation
This invention relates to the polymerization of vinylically-unsaturated monomers in the presence of a chain transfer catalysts where the polymerization process is initiated with hydrogen gas or a...
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6958378 |
Method for producing homo-and co-polymers of ethylene
The present invention provides a method for producing homo- and co-polymers of ethylene, or more particularly a method for producing homo- and co-polymers of ethylene in the presence of (a) a solid...
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6953829 |
Catalyst system and the use thereof
A catalyst system comprising at least one metallocene, at least one cocatalyst, at least one support material and, if desired, further organometallic compounds is described. The catalyst system...
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6951911 |
Cross-linked polymer and process for producing the same, absorptive structure and absorptive article
A crosslinked polymer (A) which comprises, as essential structural units, units derived from (a) one or more vinyl monomers selected from the group consisting of water-soluble vinyl monomers and/or...
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6951831 |
Catalyst composition for dimerizing, co-dimerizing, oligomerizing and polymerizing olefins
A catalyst composition for use in dimerizing, co-dimerizing or oligomerizing olefins comprises:
at least one zero-valent nickel complex; at least one acid with formula H + X − in which X...
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6887817 |
Olefin polymerization catalyst and process for preparing polyolefins using said catalyst
An olefin polymerization catalyst is described which includes: (A) a solid catalyst component being prepared by copulverizing a magnesium compound, an aluminum compound, an electron donor and a...
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6846769 |
Vanadium-imido-phosphoraneiminato complexes for the polymerization of olefins
The present invention relates to vanadium-imido-phosphoraneiminato compounds, to compositions containing vanadium-imido-phosphoraneiminato compounds, which compositions are suitable especially as...
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6844402 |
Preparation of olefin-acrylic copolymers with late transition metal catalysts
A process for making olefin-acrylic copolymers is disclosed. The process comprises polymerizing an olefin and an acrylic monomer in the presence of an activator and a Group 8-10 late transition...
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6841500 |
Bimetallic indenoindolyl catalysts
Catalyst systems useful for olefin polymerization are disclosed. The catalysts include a bimetallic complex that incorporates two linked indenoindolyl groups, each of which is pi-bonded through its...
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6812304 |
Process for producing improved premixed supported boraaryl catalysts
A process for preparing premixed supported boraaryl catalysts having improved shelf life is provided. The process comprises supporting an organometallic compound comprising a group 3-10 transition...
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6812183 |
Triple-decker catalysts based on delocalized dianionic ligands
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a triple-decker bimetallic complex. The complex includes two Group 3-10 transition metals and a...
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6794467 |
Process for the preparation of polymeric absorbents
The invention discloses a process for the preparation of polymeric absorbents useful for gelling organic liquids. The process comprises mixing one or more monomers with a cross-linking agent, a...
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6737379 |
Aluminum-oxy compound, catalyst component for polymerizing olefin, and method for producing polyolefin
Provided are an aluminium-oxy compound obtained through reaction of an organoaluminium compound with water, which is soluble in hydrocarbon solvents and in which the amount of the organoaluminium...
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6734269 |
Method for controlled free radical polymerization or copolymerization of ethylene under high pressure in the presence of an initiator-controller
The present invention relates to a process for the radical polymerization or copolymerization of ethylene under high pressure in the presence of at least one polymerization initiating-controlling...
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6693154 |
Transition metal catalysts for olefin polymerization
A catalyst system useful for polymerizing olefins is disclosed. It comprises an activator and an organometallic complex. The complex includes a Group 3-10 transition or lanthanide metal and a...
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6677423 |
Polymerization of ethylene
Polyethylene is formed by contacting ethylene with a novel iron or cobalt complex of a selected 1,4,7-triaza-3-oxa-1,4,6-heptatriene or 2,5,8-triaza-1,8-nonadiene, optionally in the presence of a...
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6670433 |
Polymers of substituted cyclopentenes
Substituted cyclopentenes, such as alkyl cyclopentenes, are polymerized by selected α-imine complexes of nickel and palladium. The polymers are useful as molding resins or elastomers. Also...
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6649713 |
Process for preparation of polyolefin/inorganic component nanocomposite by in-situ polymerization
The present invention relates to a process for preparation of polyolefin/inorganic component nanocomposite by in-situ polymerization, in which, a clay is first organically modified and then silica...
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6639028 |
Process for the continuous gas-phase (co-)polymerization of olefins in a fluidized bed reactor
A process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor using a chromium oxide catalyst. The polymerization is performed in the presence of a process aid additive.
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6630551 |
Catalyst for olefin polymerization and process for producing olefin polymer with the catalyst
A catalyst which comprises a compound of a transition metal in Groups 8 to 10 of the Periodic Table having a nitrogenous tridentate ligand, a clay, clay minteral, or lamellar ion-exchanging...
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6630548 |
Static reduction
A gas-phase process for polymerizing an olefin is disclosed. The process involves feeding the catalyst into the reactor in a stream of gas that comprises at least 75 volume % of a noble gas in...
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6624263 |
(Co) polymers and a novel polymerization process based on atom (or group) transfer radical polymerization
A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides “living” or controlled radical...
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6624107 |
Transition metal catalyst compounds having deuterium substituted ligand and catalyst systems thereof
The present invention relates to a Group 15 containing transition catalyst compound, a catalyst system and a supported catalyst system thereof and to a process for polymerizing olefin(s) utilizing...
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6608152 |
Process for the polymerization of olefins; novel polyethylenes, and films and articles produced therefrom
A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta type catalyst in the presence of a specified compound that...
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