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7381779 |
Self limiting catalyst composition with dicarboxylic acid ester internal donor and propylene polymerization process
A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of...
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7332455 |
Catalyst component and catalyst for olefin polymerization as well as use thereof
The present invention relates to a catalyst component and a catalyst for olefin polymerization. The catalyst component utilizes magnesium halide and silica as composite support, and the particle...
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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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7153803 |
High activity and good hydrogen response Ziegler-Natta polyethylene catalyst
Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of polyethylene containing a solid titanium catalyst component containing a titanium...
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7091289 |
Solid catalyst component for polymerization of ethylene, preparation thereof and a catalyst containing the same
The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition...
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6649711 |
Process for preparing vinylic polymers with catalyst system containing metal complex and Lewis acid
A polymerisation process for the preparation of vinylic polymers from the corresponding vinylic monomers which process comprises the step of reacting a vinylic monomer in the presence of a catalyst...
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6534605 |
Living polymerization process
A polymerization process for the preparation of vinylic polymers from the corresponding vinylic monomers which process comprises the step of reacting a vinylic monomer in the presence of a catalyst...
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6417300 |
Terpolymerization
Disclosed are terpolymers and processes of terpolymerization, wherein the terpolymer comprises units derived from ethylene, 1-pentene and another alpha-olefin containing at least six carbon atoms.
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6395670 |
Catalyst components for the polmerization of olefins
The present invention relates to catalyst components for the polymerization of olefins having Mg, Ti, halogen and at least two internal electron donor compounds, said catalyst components...
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6391987 |
Gas-phase polymerization process for producing propylene/1-pentene copolymers
Process for producing a propylene/1-pentene polymer in the presence of a Ziegler-Natta catalyst system with the monomer reactants being in the vapor phase while the reaction is in process and with...
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6323298 |
Propylene-based polymer, method for its production, composition thereof, catalyst component for polymerization, and method for its production
There are provided a propylene-based polymer characterized in that (1) the xylene-extraction insoluble portion (XI) is 99.0 wt % or greater, (2) the isotactic pentad ratio (IP) is 98.0% or greater...
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6303532 |
Olefin polymerization catalyst containing a transesterification product of a lower alcohol and a phthalic acid ester
In the invention a catalyst composition intended for the polymerization of olefins has been provided, which has been prepared by bringing together magnesium chloride, a lower alcohol, a titanium...
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6191246 |
Ethylene-pentene-hexene copolymer, process for its preparation and use for the production of films
The invention provides a polymer which is a polymerization product obtained by polymerizing at least ethylene, 1-pentene and 1-hexene; and a process for producing a polymer by reacting at least...
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6066702 |
Method for polymerization of an α-olefin
A method for polymerization or copolymerization of α-olefin, characterized in that the polymerization is performed using a solid complex titanium catalyst comprising magnesium, a...
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5922632 |
Vanadium based components and catalysts for the polymerization of olefins and polymerization processes using the same
Catalysts component of the (co)polymerization of alpha-olefins CH 2 CHR, wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, comprising a product of the composition: ...
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5877265 |
Solid titanium catalyst component for olefin polymerization, process for preparing the same, catalyst for olefin polymerization and process for olefin polymerization
A solid titanium catalyst component comprising (a) magnesium, (b) titanium, (c) a halogen, (d) a polyether, (e) a hydrocarbon and (f) an electron donor other than the polyether (d) as essential...
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5767215 |
Coarse-grained polyolefin, its production method and a catalyst used in the method
The invention relates to a method for preparing polyolefins. In the polymerization, a procatalyst composition is being used, which has been prepared by contacting MgCl 2 , a lower alcohol, a...
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5731393 |
Ethylene polymer, process for preparing the same, solid titanium catalyst component for ethylene polymerization and ethylene polymerization catalyst
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches and a high swell ratio and a process for preparing the polymer are disclosed. A solid titanium...
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5710229 |
Large-pole polyolefin, a method for its production and a procatalyst containing a transesterification product of a lower alcohol and a phthalic acid ester
The invention relates to a method for preparing polyolefins by polymerizing an olefin with a procatalyst composition prepared by bringing together MgCl 2 , a lower alcohol, a titanium compound and...
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5663248 |
Procatalyst component based on a transition metal compound on a carrier of magnesium chloride and manganese halide
Olefin polymerization catalysts the procatalyst component of which comprises a transition-metal compound on a magnesium chloride support material are known to all. Now the procatalyst component has...
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5583188 |
Process for producing an olefin polymer or copolymer and catalyst composition therefor
As improved process for producing an olefin polymer or copolymer by using a novel catalyst composition composed of (A) a titanium catalyst component containing magnesium, titanium, halogen and an...
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5532326 |
Process for preparing elastomeric ethylene copolymers
Process for preparing elastomeric copolymers of ethylene with α-olefins CH 2 CHR, optionally containing minor proportions of a diene, characterized by the use during the polymerization of a...
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5498676 |
Process for olefin polymerization
A high activity olefin polymerization catalyst catalyzes the production of polymeric lower α-olefin having good properties. The catalyst is produced from an organoaluminum cocatalyst, a...
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5414063 |
Process for the production of polypropylene
A process control scheme for temporarily slowing or killing the production of polypropylene while idling the reactor using a fourth generation catalyst system containing a solid magnesium chloride...
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5387664 |
Higher α-olefin copolymer, vibration-insulating rubber molded product, and process for the preparaton of the rubber molded product
The higher α-olefin copolymer of the invention is a copolymer of specific higher α-olefin, specific α,ω-diene and specific non-conjugated diene, and this copolymer has a specific molar ratio of...
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5360776 |
Stereoselective catalyst for the polymerization of olefins
In the invention a procatalyst of a catalyst system of a new type intended for the polymerization of olefins has been prepared comprising a carrier based on a magnesium compound, a titanium...
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5354828 |
Higher α-olefin copolymer, process for preparing same, and vulcanizable rubber composition
The higher α-olefin copolymers obtained in accordance with the present invention are copolymers derived from higher α-olefin and non-conjugated diene represented by the following general formula...
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5354820 |
Process for the preparation of olefin polymer
This invention relates to a process of producing an olefin polymer having stereoregularity by polymerizing an olefin in the presence of a catalyst obtained from (A) a solid catalyst component...
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5349033 |
Process for the preparation of polyolefin
It is possible to obtain globular polymers in the polymerization of alpha-olefins by means of a highly active, spherical Ziegler catalyst. The polymers have a high bulk density and can be processed...
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5294581 |
Process and catalyst for producing mildly elastomeric primarily isotactic polymers
A process and a catalyst for the production of mildly elastomeric primarily isotactic polyolefins characterized by intermediate average block lengths wherein olefins are polymerized in the presence...
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5278210 |
Process for the preparation of stabilized polyolefins and products obtained therefrom
Polyolefins stabilized against oxidation phenomena are obtained by using a process comprising the polymerization of monomers by way of a catalyst prepared by reacting an aluminum alkyl compound,...
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5270410 |
Process for the production of elastomeric, primarily syndiotactic polypropylene and catalysts for use in said process
A process and a catalyst for the production of elastomeric primarily syndiotactic polypropylene characterized by short average block lengths wherein propylene is polymerized in the presence of the...
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5247032 |
Solid catalyst components for olefin polymerization and processes for the polymerization of olefin using same
The present invention relates to solid catalyst components for olefin polymerization formed by prepolymerizing at least two types of α-olefin on an olefin polymerization catalyst comprising a...
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5247031 |
Olefin polymerization catalyst component, process for production thereof, olefin polymerization catalyst, and process for polymerizing olefins
A catalyst component (X") obtained by treating an olefin polymerization catalyst (X) formed from (A) a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron...
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5244996 |
Hot-melt adhesive
A random copolymer of an α-olefin having 4 to 12 carbon atoms with an aromatic vinyl monomer containing 50 to 98% by mol of α-olefin and having a softening point of 40° to 150° C. is useful as...
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5236962 |
Crystalline propylene polymers and copolymers in the form of spherical particles at high porosity
Crystalline polymers and copolymers of propylene in the form of spherical particles having a porosity (expressed in percentage of voids) greater than 15%. These polymers are useful in the...
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5234879 |
Method for the modification of catalysts intended for the polymerization of olefins
When asymmetric olefins or a monomer mixture containing asymmetric monomers is polymerized by a catalyst composition containing esters of carboxylic acid e.g. as a so-called donor, and alcohol the...
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5231119 |
Crystalline olefin polymers and copolymers in the form of spherical particles at high porosity
Crystalline olefin polymers and copolymers in the form of spherical particles having porosity (expressed in percentage of voids) higher than 15%, with more than 90% of the pores having a pore...
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5223466 |
Olefin polymerization and copolymerization catalyst
A process for making a magnesium-containing supported titanium-containing, alpha-olefin polymerization or co-polymerization catalyst or catalyst component having a large particle size,...
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5221651 |
Component and catalysts for the polymerization of olefins
Spherical catalyst components for the polymerization of olefins comprising a titanium compound and optionally an electron-donor supported on anhydrous magnesium chloride, characterized by a surface...
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5215949 |
Method and equipment for the preparation of a carrier of a polymerization catalyst
In conventional spraying methods the problem in the preparation of small carrier particles aimed for the polymerization is that the drops constituting the prestages of the particles agglomerate or...
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5208302 |
Catalyst, process for preparation of same and process for polymerization of olefins using same
Disclosed is a catalyst composition for use in the polymerization of olefins, which is comprised of (a) a catalyst component containing magnesium, titanium, a halogen, and an ingredient derived...
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5206314 |
Polyolefin polymerization process, process of producing catalyst, and catalyst
A polymerization catalyst useful for the polymerization of olefins is prepared by contacting a metal dihalide compound having a metal selected from Group 2 and Group 12 of the Periodic Table and a...
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5192732 |
Propylene polymerization cocatalyst containing silane and resultant catalysts
A cocatalyst for use in association with a catalytic component comprising a titanium compound and an internal electron donor on a magnesium halide support for the polymerization of propylene alone...
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5189124 |
Process for producing α-olefin polymers
A process for producing an α-olefin polymer which comprises homopolymerizing or copolymerizing an α-olefin by the use of a catalyst system comprising: (A) a solid catalyst component (A)...
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5182245 |
Olefin polymerization and copolymerization catalyst
A catalyst or catalyst component for the polymerization or copolymerization of alpha-olefins in the slurry phase is formed by a process comprising forming a solution of a magnesium-containing...
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5177043 |
α-olefin polymerization catalyst component
This invention relates to a catalytic component for the polymerization of α-olefins and provides a catalytic component of magnesium support type capable of exhibiting a high stereoregularity while...
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5166113 |
Zieger-natta-type catalyst systems
Ziegler-Natta-type catalyst systems containing, as active constituents, a) a titanium-containing solid component which also contains magnesium, halogen and a carboxylic acid ester, and, as...
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5164352 |
Process for the production of elastomeric, primarily isotactic polyolefins and catalysts for use in said process
A process for the production of elastomeric, primarily isotactic polyolefins which comprises polymerizing olefins in the presence of a catalyst which comprises the reaction product of a magnesium...
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5139985 |
Components and catalyst for the polymerization olefins
Catalyst components for the polymerization of olefins comprising a titanium or vanadium compound supported on a porous particulate polymeric support which particles have a porosity greater than 0.3...
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