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7632772 |
Recyclable ruthenium catalysts for metathesis reactions
The invention relates to novel carbene ligands and their incorporated monomeric and resin/polymer linked ruthenium catalysts, which are recyclable and highly active for olefin metathesis reactions....
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7601787 |
Ethylene polymerization process
A process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a Ziegler-Natta catalyst system in two slurry reaction zones. Most of the polyethylene (70-95...
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7601423 |
Ethylene-based polymer microparticles, functional group-containing ethylene-based polymer microparticles, and catalyst carriers for manufacture thereof
Ethylene-based copolymer microparticles and functional group-containing ethylene-based copolymer microparticles that have particle diameter smaller than that of conventional polyethylene...
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7585923 |
Polymerization monitoring and method of selecting leading indicators
Embodiments of our invention relate generally to methods of monitoring and controlling polymerization reactions including reactions producing multimodal polymer products using multiple catalysts in...
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7582715 |
Polymers substantially free of long chain branching
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In...
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7563848 |
Crosslinked polycyclooctene
Chemically crosslinked polycyclooctene having excellent shape recovery properties and a method for its synthesis via ring-opening metathesis polymerization of cyclooctene using the...
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7531606 |
Method for operating a gas phase polymerization reactor
Disclosed herein is a method of operating a polymerization reactor for a polymerization reaction comprising modifying a recycle gas composition to increase the heat capacity of the recycle gas...
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7524912 |
Preparation of linear ethylene-acrylate copolymers with palladium catalysts and free radical scavengers
A polymerizable composition including a late transition metal complex, a non-polar olefin, a polar olefin, and a free radical scavenger, wherein the polymerizable composition is capable of forming...
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7501479 |
Cationic polymerization of biological oils with superacid catalysts
A method for the cationic polymerization of unsaturated biological oils (e.g., vegetable oils and animal oils) based on the cationic reaction of double bonds initiated by superacids is provided....
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7446213 |
Detection of negatively charged polymers using water-soluble, cationic, polythiophene derivatives
Novel methods allowing for the simple optical detection and electrochemical detection of doubled-straded oligonucleotides are disclosed. The methods are rapid, selective and versatile....
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7442749 |
Sulfur-containing poly (unsaturated carboxylic acid) and its uses and production process
There are disclosed a novel sulfur-containing poly(unsaturated carboxylic acid) and its uses and production process. A sulfur-containing poly(unsaturated carboxylic acid) having a weight-average...
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7375170 |
Organosilicon compound
Since the majority of conventional organic/inorganic composite materials are obtained by mechanical blending of a silsesquioxane and an organic polymer or other means, it was extremely difficult to...
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7335703 |
Polyolefin graft copolymer prepared in the presence of coordination polymerization catalyst based on late transition metal complex and method for making the same
A novel polyolefin graft copolymer prepared by graft-copolymerizing an olefin monomer with a (meth)acryl macromonomer or an isobutylene macromonomer in the presence of a coordination polymerization...
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7332555 |
Polymers with new sequence distributions
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the...
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7332550 |
Stabilization of transition metal complexes for catalysis in diverse environments
This present invention is directed towards the identification or design, preparation, and use of suitable transition metal complexes for use as catalysts. The transition metal complexes may...
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7323519 |
Process for producing vinyl polymer, vinyl polymer, and curable composition
The present invention provides: a process for preparing a vinyl polymer containing a halogen in an amount of 1,000 mg or less per kilogram, in which a vinyl polymer containing the halogen produced...
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7294680 |
Method of producing conjugated diene polymers with narrow molecular weight distribution and polymer produced
Conjugated diene polymers having good wear resistance, mechanical properties, storage stability, processability and a reduced cold flow are produced by polymerizing a conjugated diene compound with...
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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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7125938 |
Atom or group transfer radical polymerization
A polymerization process comprising initiating a first polymerization of monomers using an initiator functionalized with an ATRP initiating site, wherein the first polymerization is selected from...
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7122691 |
Process for producing compound, 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 compound, which comprises the step of contacting a compound (A) defined by the formula, M 1 L 1 3 , a compound (B) defined by the formula, R 1 t-1...
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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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7083928 |
Detection of negatively charged polymers using water-soluble, cationic, polythiophene derivatives
Novel methods allowing for the simple optical and electrochemical detection of double-stranded oligonucleotides are disclosed. The methods are rapid, selective and versatile. Advantageously, they...
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7009012 |
Supported catalyst for producing syndiotactic styrenic polymer
The present invention provides a supported catalyst comprising (A) a polymer (B) a supporter, (C) a transition metal compound, and optionally (D) (a) a compound which can form an ionic complex by...
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7005485 |
Process for producing polyolefins
A process is provided that produces polyolefins. The process comprises mixing a first stream, which comprises at least one catalyst deactivating agent, with a second stream, which comprises at...
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6992155 |
Method for producing magnetic particle, magnetic particle and magnetic material
A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain...
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6988022 |
Method for online estimation of reactor split for multimodal polyolefins
The present method is directed to techniques for estimating and periodically controlling the reactor split of alpha-olefin polymerizations using multiple catalysts that selectively incorporate...
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6979718 |
Process for making polyolefin compositions containing exfoliated clay
A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a...
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6977284 |
Polymerizable composition and cured resin composition
It is an object of the present invention to provide a polymerizable composition and a cured resin composition, linear expansion coefficients of which are significantly improved without impairment...
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6967230 |
Process for producing polyolefins
A process is provided that produces polyolefins.
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6958376 |
Inlet distribution device for upflow polymerization reactors
A polymerization process and polymerization reactor are provided. For example, a polymerization process is described, including passing a feed stream including liquid and gas through a feed stream...
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6956094 |
Bimodal polyolefin
The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a...
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6956003 |
Catalyst system for ethylene (co)-polymerization
A catalyst system for (co)-polymerizing ethylene or ethylene with α-olefin is disclosed. The catalyst system utilizes a catalyst component that contains the product of a reaction of an early...
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6956092 |
Poly (meth) acrylamide with a high stereoregularity and process for producing the same
The present invention provides a novel high-molecular substance having a unique function and a process for producing the same. That is, it is a poly(meth)acrylamide which has a syndiotacticity of...
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6949613 |
Polymerization initiator and use
The application discloses supported initiators for transition metal mediated living free radical and/or atom transfer polymerisation comprising an initiator moiety attached to a support via a...
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6936672 |
Mold addition polymerization of norbornene-type monomers using group 10 metal complexes
A catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene, ethylnorbornene, butylnorbornene or hexylnorbornene, 1,2,3,4,4 a...
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6927260 |
Optimization of heat removal in a gas-phase fluidized-bed process
A process for preparing polyethylene from “feed ethylene” comprises: a) a hydrogenation stage in which “feed ethylene” containing impurities or secondary components such as acetylene and...
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6908971 |
Catalyst slurry feeding assembly for a polymerization reactor
A catalyst slurry for a polymerization reactor can be prepared in a mixing tank and the catalyst slurry fed to one or more storage tanks. The storage tanks can include agitators so that the...
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6900281 |
Gas phase olefin polymerizations using dual donor catalyst systems
A gas-phase olefin polymerization process in a plug flow reactor uses a catalyst system containing a magnesium halide supported titanium-containing component, an organoaluminum component, and at...
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6888018 |
ORGANOMETALLIC COMPOUND HAVING HIGH METATHESIS ACTIVITY AND METHOD FOR PREPARATION THEREOF, METHATHESIS REACTION CATALYST COMPRISING THE COMPOUND, METHOD OF POLYMERIZATION USING THE CATALYST, AND POLYMER PRODUCED BY THE METHOD OF POLYMERIZATION
The present invention provides an organometallic compound represented by the general formula (1) or (2), process for producing the same, metathesis reaction catalyst containing the same,...
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6887956 |
Catalyst system for high-cis polybutadiene
A catalyst system suitable for use in the production of high cis polybutadiene is disclosed. The catalyst system includes a cobalt salt of the formula
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6884863 |
Catalyst fines handling and disposal process
The present invention is directed to a process for handling and/or disposing catalyst fines produced in an oxygenate-to-olefins reactor. The process enhances the way catalyst fines are separated...
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6870014 |
Catalyst and method for producing polytetrahydrofurane
The invention relates to a catalyst which contains a catalytically active quantity of at least one oxygen-containing molybdenum and/or wolfram compound on an oxidic support material and which has...
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6867270 |
Process for transitioning between incompatible catalysts using a substantially contaminant free seedbed
The present invention is a process for transitioning from a first polymerization reaction to a second polymerization reaction incompatible with the first polymerization reaction in a gas-phase...
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6864332 |
Process for the gas phase polymerization and copolymerization of olefin monomers
A process for polymerizing monomers in the gas phase, in fluidized bed reactors is described, where unsaturated, gas phase monomers are fed into the reactors in the presence of a mixture of inert...
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6858763 |
Process for preparing elastomeric ethylene-hexafluoropropylene copolymer
The present invention relates to a process for preparing an elastomeric ethylene-hexafluoropropylene copolymer with excellent vulcanization properties, which comprises emulsion polymerizing...
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6838532 |
Method for transitioning from a catalyst to an incompatible catalyst in a gas-phase reactor
The present invention is a process for transitioning from a first polymerization catalyst system to a second polymerization catalyst system incompatible with the first polymerization catalyst...
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6833416 |
Methods of polymerizing olefin monomers with mixed catalyst systems
A method of transitioning catalysts for polyolefin polymerization is provided. In one aspect, the process includes providing a polymerization reactor that includes a first catalyst system,...
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6828396 |
Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component for olefin polymerization
There are provided: (I) a solid catalyst component (A-1) for olefin polymerization, which is obtained by a process comprising the step of contacting: (a-1) a carrier of carboxyl group-carrying...
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6822031 |
Resin composition and a multilayered container
The present invention provides a resin composition having an oxygen scavenging function. The resin composition comprises a gas barrier resin (A), a thermoplastic resin (B) other than the gas...
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6806336 |
Process for polymerizing ethylene, higher alpha-olefin comonomer and dienes, especially vinyl norbornene; polymers made using such processes; and articles made from such polymers
This invention relates to olefin polymerization processes for polymerizing ethylene, higher alpha-olefin comonomer and dienes, especially vinyl norbornene, and especially process for producing...
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