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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.
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
6878787 Polyamide 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...
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...
6803339 Latent metallocene catalyst systems for olefin polymerization  
A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of an unsaturated hydrocarbon passivating compound.
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...
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...
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...
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...
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.
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...
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...
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...
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...
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...
6468937 Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component  
There are disclosed: (i) a first solid catalyst component obtained by contacting (a) a carrier of carboxyl group-carrying polymer particles having an average particle size of from about 1 to 200...
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...
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....
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...
6444604 Supported catalysts for the polymerization of olefins  
Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an...
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...
6423660 Supported catalysts for the polymerization of olefins  
Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an...
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...
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...
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....
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...
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...
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...
6340771 “Sweet” MAO  
Aluminoxanes are used as activators for the gas, solution or slurry phase polymerization of olefins in the presence of single site catalysts. Aluminoxanes contain residual aluminum alkyls which may...
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...
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...
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...
6221802 Catalyst support and catalyst for the polymerization of α-olefins  
The invention comprises a 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...
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...
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...
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...
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...
6100214 Polymeric supported catalysts for olefin polymerization  
The described invention provides a low fouling, high particle density polymerization process and an olefin polymerization catalyst composition comprising the reaction product of a) an organic...
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...
6048817 Polymerization of olefins  
A particulate phyllosilicate mixture comprising a mixture containing a phyllosilicte belonging to the smectite group and a phyllosilicate belogning to the mica group, the phyllosilicate particle...
Matches 1 - 50 out of 172 1 2 3 4 >