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7612008 |
Metathesis catalysts
The invention relates to polymeric transition metal catalysts, to processes for preparing them, to intermediates and also to the use of the transition metal catalysts as catalysts in organic...
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7592285 |
Method for preparing an olefin polymerization catalyst composition
The present invention provides for a method for preparing a storable fluidic olefin polymerisation catalyst composition, said catalyst comprising an organometallic compound of a transition metal of...
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7528090 |
Supported polymerisation catalysts
A supported polymerisation catalyst system comprises a porous support, a polymerisation catalyst and a cocatalyst wherein the support has been treated with an inert material such as polyisobutene....
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7300901 |
Hollow beads of polyethylene
The present invention discloses a method for preparing hollow beads of polyethylene of controlled morphology and size.
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7271119 |
Process for preparing an olefin polymerization catalyst component
Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a...
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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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7084216 |
Process for the polymerization of olefins
The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst...
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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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7022793 |
Process for the treatment of polymer compositions
A process for the preparation of heterophasic elastomeric polymer comprising the step of polymerizing ethylene, an alpha-olefin CH2═CHL, where L is an alkyl, cycloalkyl or aryl radical with...
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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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7005398 |
Olefin polymerization catalyst, catalyst component for olefin polymerization, method of storing these, and process for producing olefin polymer
A catalyst is used which comprises a cocatalyst component wherein a non-coordinating ion-containing compound is chemically bonded to a fine particulate carrier, together with a metallocene compound...
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6992153 |
Multi-stage process for the (CO) polymerization of olefins
Multi-stage process for the polymerization of olefins CH 2 ═CHR, where R is hydrogen or a C 1 –C 10 alkyl, cycloalkyl or aryl radical, comprising: (I) a first polymerization stage carried out...
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6969747 |
Olefin polymerization titanium catalyst
An olefin polymerization titanium catalyst. It comprises a titanium compound and an organoaluminium compound cocatalyst supported on a soluble polysulfone comprising free reactive sulfone groups....
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6916761 |
Polymer-supported Lewis acid catalyst
In order to provide a novel Lewis acid catalyst, which shows high reaction activity in aqueous medium, is easily recovered, and is excellent in reusability, a Lewis acid group expressed by the...
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6900153 |
Supported olefin polymerization catalysts
A method for forming supported late transition metal olefin polymerization catalysts is described in which an already formed transition metal complex, usually containing a reactive functional...
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6815390 |
Supported fluorous biphasic catalyst system
The present invention relates to a new catalyst system for fluorous biphasic catalysis processes which comprises functionalized polymeric beads, monodisperse SiO 2 or SiO 2 flakes associated with...
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6750303 |
Functional organic particles for catalysts supports
Functional polymers containing hydroxyl groups as supports for use with catalysts can increase the activity of these catalysts which results in improved ethylene polymerization. The present...
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6750170 |
Sweet MAO
Single site catalysts which contain a transition metal, a cyclopentadienyl may be activated with alumoxanes in the gas, solution or group-containing ligand, and a phosphinimine ligand slurry phase...
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6743873 |
Olefin polymerization catalyst composition and preparation thereof
A catalyst composition useful for catalyzing the polymerization of olefinic monomers is disclosed, along with a polymerization method using those catalyst compositions to prepare a variety of...
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6730753 |
Catalyst systems of the ziegler-natta type and a process for preparing them
Catalyst systems of the Ziegler-Natta type, which are suitable for the polymerization of olefins are prepared by: A) bringing an inorganic metal oxide on which a magnesium compound has been...
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6723881 |
Method for conditioning ion exchangers
Monodisperse cation-exchangers and anon-exchangers are conditioned by a process and thereafter used as catalysts and for the production of bisphenols.
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6703458 |
Catalyst components for the polymerization of olefins
Spherical catalyst components for the polymerization of olefins of formula RCH═CHR, in which R is, independently, hydrogen or a hydrocarbon group with 1-10 carbon atoms, containing a homogeneous...
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6583082 |
Functional organic particles for catalyst supports
Functional polymers containing hydroxyl groups as supports for use with catalysts can increase the activity of these catalysts which results in improved ethylene polymerization. The present...
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6531551 |
Polypropylene composition, process for preparing the same, and polymerization catalyst therefor
A polypropylene composition comprising 0.001 to 10 parts by weight of a polyethylene having an intrinsic viscosity [ηE] of 0.01 to less than 15 dl/g s measured in tetralin at 135° C. and 100...
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6524986 |
Catalyst support and catalyst for the polymerization of α-olefins
Catalyst support containing an α-olefin polymer which is in the form of particles of mean size from 5 to 350 μm in which the pore volume generated by the pores of radius from 1,000 to 75,000 Å...
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6482764 |
Method for producing a supported catalyst for ethylene polymerization and ethylene/α-olefin copolymerization
A method for producing a supported catalyst useful in polymerization of ethylene and copolymerization of ethylene and α-olefin is disclosed. The method includes treating the magnesium-containing...
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6461993 |
Method for preparing a hydrogenation catalyst system
This invention concerns a method for preparing a hydrogenation catalyst system involving the reaction of a group 4 metallocene (A) with a metal hydride or an organometallic compound (B) at a...
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6448348 |
Process for polymerizing olefins with supported Ziegler-Natta catalyst systems
A catalytic polymerization process for preparing polymer products is provided. The polymerization process is either homopolymerization of olefins or copolymerization of olefins with alpha-olefins....
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6444766 |
Method for producing carrier-borne catalysts
A process for preparing a supported catalyst comprises the steps of (1) preparation of a copolymer having comonomer units which comprise leaving groups; (2) polymer-analogous reaction with a...
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6432860 |
Supported metallocene catalysts
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers which contain three or more carbon atoms or...
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6417320 |
Catalyst and method for its production and use
The production of linear polyester by the interchange of ester radicals or esterification and polycondensation of multivalent alcohols with multivalent carboxylic acids takes place by means of...
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6413901 |
Highly active, supported ziegler-natta catalyst systems for olefin polymerization, methods of making and using the same
A catalyst composition for alpha olefin polymerization is provided. The catalyst composition is prepared by a process including treating PVC containing particles with an organomagnesium compound in...
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6403519 |
Process for the preparation of a catalyst for the polymerization of alpha-olefins, catalyst obtained and polymerization process using such a catalyst
Process for the preparation of a catalyst for the polymerization of alpha-olefins involves contacting a porous polyolefin support with a solution containing an activator (ii) to form a suspension....
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6384159 |
Production of polyethylene with a titanium amide catalyst
The present invention relates to a process to produce polyethylene through homopolymerization or copolymerization of ethylene with alpha-olefins in the presence of a titanium amide catalyst...
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6383969 |
Process for the preparation of a catalytic composition for the polymerization of alpha-olefins, catalytic composition obtained and polymerization process using such a catalytic composition
Disclosed is for the preparation of a catalytic composition for the polymerization of alpha-olefins. The catalyst comprises a compound of a transition metal (i) of Groups 4 to 6 of the Periodic...
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6358876 |
Organo-aluminum compounds immobilized on organopolysiloxane microgel particles
The invention relates to particles comprises of organopolysiloxane microgel particles having a diameter of 5 to 200 nm and organo-aluminum compounds immobilized thereon. The particles can be used...
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6268453 |
Polymerization catalyst systems, their preparation, and use
A solid cocatalyst is prepared by reacting a suitable support base with an organoaluminum compound and then reacting that product with an activity promoting amount of water. The solid cocatalyst...
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6255244 |
Polymerization catalysts for olefinic and styrenic monomer and polymer production method
A catalyst for polymerization of olefins or styrenes, which is prepared by contacting (A) a transition metal compound, (B) at least one material selected from the group consisting of...
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6239060 |
Supported metallocene catalyst system and method for polymerizing olefins
The present invention provides a new type of supported metallocene catalyst system. In one aspect of the invention, an inorganic oxide support, such as silica, is impregnated with a Group XIII...
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6218331 |
Polymer-supported catalyst for olefin polymerization
The present invention is directed to a process of preparing a novel supported Ziegler-Natta catalyst useful for the polymerization of α-olefins. More specifically, the supported Ziegler-Natta...
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6197985 |
Solid aluminoxane for catalyst carrier, process for preparing the same, and uses thereof
A low-bulk density solid aluminoxane has an average particle diameter of 210 to 10,000 μm and a bulk density of from 0.01 to 1.0 g/cc. Representative solid aluminoxanes may be prepared from...
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6152543 |
Isolatable catalyst system suitable for the polymerization of C.sub.2 -C.sub.10 -alk-1-enes
A catalyst system suitable for the polymerization of C 2 -C 10 -alk-1-enes comprising, as active ingredients, a complex compound of metals in Sub-groups IV and V of the Periodic Table and an...
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6100353 |
Supported metallocene catalyst systems
Supported catalyst systems are obtainable by a) application of a mixture of A) at least one metallocene complex and B) at elast one metal compound to a carrier which, if required, may have...
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6063725 |
Olefin polymerization catalyst system
An olefin polymerization catalyst system comprising an organic transition metal compound and a support, wherein an organic transition metal compound is soluble in an inert organic solvent and a...
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6040260 |
Process for the preparation of repolymerized catalyst composition and a process for polymerizing α-olefins
The present invention concerns prepolymerized catalyst composition for polymerization of β-olefins, a process for the preparation thereof and a process for polymerization of β-olefins. According...
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6013594 |
Spray dried polymer for catalyst support
This invention relates to catalyst supports made by spray drying an emulsion polymerized latex and the novel supported catalysts utilizing these supports. This invention further relates to a method...
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5922819 |
Process for producing polymers of vinyl aromatic compounds using polymer-containing catalyst systems
Polymers of vinylaromatic compounds are prepared at from 0 to 150° C. in the presence of catalyst systems which comprise as active constituents A) compounds of the formula I XM(Z 1 ) z s (Z...
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5854164 |
Method for preparing catalyst component for olefin polymerization, catalyst for olefin polymerization and process for producing olefin polymer with the catalyst
A solid catalyst component (A) for olefin polymerization comprising Mg, Ti, a halogen and a cyclic organic nitrogen compound (C), a solid catalyst comprising the solid catalyst component and an...
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5847055 |
Polymer-containing catalyst systems
A catalyst system of the formula I X M (Z 1 ) z s (Z 2 ) z s (Z 3 ) z s I where X is C 1 -C 10 -alkyl, 5- to 7-membered cycloalkyl, C 1 -C 10 -alkoxy, C 6 -C 15 -aryl or a compound of...
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5744414 |
Process for preparing an olefin polymerisation catalyst
The present invention relates to a process for the preparation of a solid catalytic component of a catalyst of Ziegler-Natta type, comprising contacting (i) at least one compound (A) of a...
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