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7365138 |
Pretreated and prepolymerized polyolefin catalyst, production thereof and method of use
A method of modifying a Ziegler-Natta type polyolefin catalyst comprises contacting the Ziegler-Natta catalyst with olefin monomer to form a prepolymerized catalyst. The prepolymerized catalyst can...
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7256150 |
Preparation of olefin polymerization catalyst component
A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 complex is reacted with a transition metal compound so as to produce an oil-in-oil...
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7211535 |
Enhanced polyolefin catalyst
The present invention provides a novel process for preparing a catalyst useful in gas phase polymerization of olefins wherein the physical properties of the polymer and the productivity of the...
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7008898 |
Method for producing a poly-1-olefin in the presence of a ziegler catalyst
The invention relates to a method for producing a poly-1-olefin by polymerisation of a 1-olefin of the formula R 4 CH═CH 2 , in which R 4 is hydrogen or an alkyl radical having from 1 to 10...
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6992034 |
Catalyst component for olefin polymerization
A solid catalyst component useful for the (co)-polymerization of olefins is disclosed. The catalyst component is prepared by reacting an activated magnesium halide composite support with a...
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6982307 |
Matrix and process for polyolefin production
Olefin-based materials react with a range of catalysts and catalytic systems to form catalytic matrices, which are employed in the production of a variety of polyolefin products.
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6956002 |
Process for polymerization of olefins
A catalyst for olefin polymerization, comprising:
a solid catalyst component comprising [A] a solid component having substantially no hydroxyl group, [B] a compound of a transition metal...
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6924343 |
Olefin polymerization catalyst component, its preparation and use
A process for polymerizing olefins using a high activity catalyst. The catalyst utilize in the present process has a good balance in activity and can be used to carry out ethylene polymerization at...
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6846887 |
Polyolefin catalysts, production thereof and method of use
A method of modifying a Ziegler-Natta type polyolefin catalyst comprises contacting the Ziegler-Natta catalyst with olefin monomer to form a prepolymerized catalyst. The prepolymerized catalyst can...
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6586543 |
Process for the preparation of substantially amorphous poly-α-olefins
The present invention provides a process for preparing a substantially amorphous poly-α-olefin, which includes: a) preforming a solid catalyst and, optionally, a first amount of a...
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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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6511935 |
Methods of making magnesium/transition metal alkoxide complexes and polymerization catalysts made therefrom
A method of halogenating a precursor to form a polymerization procatalyst is disclosed whereby a magnesium/transition metal-containing alkoxide complex precursor is contacted with a halogenating...
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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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6433108 |
Catalytic component and its use in olefin polymerization
The invention relates to a process for the manufacture of a solid catalytic component for the polymerization or copolymerization of olefins, resulting in a polymer or copolymer with broadened...
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6339036 |
Low aluminum and magnesium Z-N solution catalysts
The present invention provides a Ziegler-Natta catalyst useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present...
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6214950 |
Process for preparation of polyolefin using an olefin polymerization catalyst
A process for preparation of polyolefins using an olefin polymerization catalyst comprising (A) a solid catalyst component and (B) an organometallic compound component. The solid catalyst component...
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6143845 |
Process for producing polyolefin
There is disclosed a process for producing a polyolefin which comprises polymerizing an olefin by the use of a catalyst comprising a specific transition metal compound, an aluminoxane and a...
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6084042 |
Mixed titanium-vanadium catalysts for solution ethylene polymerization
The present invention provides a Ziegler-Natta catalyst based on titanium and vanadium useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium....
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6080828 |
Polymerization catalyst and process for preparing an ethylene polymer
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio, and a process for preparing the ethylene polymer...
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6043326 |
Process for copolymerizing ethene and alpha-olefins
Ethene having a profitable α-olefin distribution and an α-olefin copolymer have been prepared with a process comprising reacting of at least the following components with each other: a) a...
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6013743 |
Process for polymerization of alpha-olefins
A process for producing an alpha-olefin polymer, which comprises polymerizing an alpha-olefin in the presence of a catalyst formed from (A) a solid catalyst component comprising an inorganic...
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6001939 |
Process for the polymerization of olefins
Process for the polymerization of olefins, in which at least one olef in is placed in contact with a catalytic system comprising: (a) a solid catalytic complex based on magnesium, on transition...
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5962595 |
Blend of high-molecular-weight polypropylene and high-molecular weight ethylene-propylene copolymer with broad molecular weight distribution
The invention relates to a high-molecular-weight reactor blend comprising a high-molecular weight polypropylene and a high-molecular weight ethylene-propylene copolymer and having an ethylene...
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5962615 |
Ethylene polymer
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio produced by using a solid titanium catalyst...
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5925587 |
Supported polymerization catalyst component and system, Polymerization process using same for the production of ultra-fine particle size resins with improved crystallization rates
A supported polymerization catalyst component and a catalyst system useful in the production of polyolefin resins that have a narrow particle size distribution and enhanced crystallization rates is...
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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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5917100 |
Process for producing low molecular-weight poly-1-olefins
A catalyst formed by the reaction of a magnesium alkoxide dispersion having a particle size of from 100 to 3000 nm with a compound of a metal selected from the group comprising titanium, zirconium,...
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5824618 |
Catalyst components for polymerization of olefins
A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula M 1 (OR 1 ) p R 2 q X...
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5631334 |
Process for the manufacture of a catalytic solid, catalytic solid and process for (co)polymerisation of olefins by means of this catalytic solid
Catalytic solid for the (co)polymerisation of at least one olefin, comprising a coprecipitate of magnesium and of at least one transition metal, obtained by means of a process comprising the...
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5612427 |
Catalyst for the polymerization of diolefins, method for its preparation, and its use for the preparation of polymers
A supported solid catalyst which can be used for the polymerization and clymerization of conjugated dienes having as its basis the reaction product of: A) a solid MgCl 2 support, B) an...
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5607655 |
Olefin polymerization catalyst and precursor therefor
A generally dipyramidal-shaped catalyst precursor is prepared by dissolving magnesium dichloride and a suitable alcohol in a suitable solvent and then cooling to obtain a precipitate of the desired...
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5589555 |
Control of a solution process for polymerization of ethylene
A solution process for the preparation of high molecular weight polymers of alpha-olefins selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and C 3 -C 12 ...
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5578540 |
Catalyst for the preparation of elastomeric ethylene-propylene copolymers
Solid component of a catalyst for the synthesis of elastomeric Ethylene-Propylene copolymers typically amorphous, basically consisting of a Titanium compound supported on a solid component mainly...
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5519098 |
Activation of catalyst in ethylene polymerization at high temperatures
The present invention relates to a method for activating coordination catalysts suitable for the polymerization of alpha olefins using a alkoxy aluminum alkyl compound prepared by mixing an alcohol...
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5492983 |
Catalysts and process for the preparation of catalysts which may be used for the polymerization of ethylene
This catalyst consists of the reaction product, with at least one organomagnesium compound and/or organolithium compound R 1 Li (R 1 =alkyl) or ArLi (Ar=phenyl or benzyl), of the reaction product...
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5407882 |
Olefin polymerization catalyst and olefin polymerization process
A catalyst for polymerization of olefin is provided which comprises (A) a metallocene compound, (B) an organoaluminum compound, and (C) a metal borate or a metal aluminate. The metallocene compound...
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5384298 |
Catalyst for polymerization of olefin and process for production of olefin polymer
A catalyst for polymerization of an olefin, is provided which contains a solid catalyst component (A) obtained by supporting a transition metal compound having formula (1): ##STR1## onto a solid...
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5320994 |
Process for preparing a catalyst for the polymerization of olefins
The process comprises, in a first step, the reduction of a titanium (IV) compound in an α,ω-dihalogenoalkane using a molar excess of at least one halogenated organoaluminium compound in the...
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5292837 |
Process for the preparation of ethylene (co)polymers
For the homopolymerization of ethylene or for the copolymerization of ethylene with other 1-olefins, a catalyst is used which comprises a trialkylaluminum compound and the entire product from the...
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5278118 |
Catalysts for the preparation of elastomeric olefinic copolymers
Catalysts for the preparation of copolymers of ethylene and/or alpha-olefins and optionally dienes, are obtained by reacting an Al-alkyl with a solid catalytic component comprising: (A) a...
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5246900 |
Olefin polymerization catalysts and processes of making the same
Olefin polymerization catalysts and processes for preparing and using the catalysts are provided. The catalysts are prepared by forming a particulate gel containing aluminum and magnesium...
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5225502 |
Method of producing polyolefin
A method of producing a polyolefin, which comprises polymerizing at least one olefin in the presence of a catalyst system comprising (A) a catalyst component prepared by bringing ethylene and/or...
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5151397 |
Method of producing metal halide catalyst
A polymerization catalyst is formed by combining a metal halide compound, a solvent, an effective amount of water to reduce fines and increase particle size, and a transition metal compound to form...
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5126301 |
Solid catalyst for polymerizing an olefin
A solid catalyst for polymerizing an olefin is prepared from an organometallic compound, a fine-particle carrier, an aluminoxane, a compound of group IVB transition metal in periodic table, and an...
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5118769 |
Manufacturing method of polyolefin
A manufacturing method of polyolefin is disclosed wherein the catalyst used for the polymerization of α-olefins at a temperature lower than the melting point of polymer in the presence of said...
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5114897 |
Catalyst and process for polymerizing olefins
Olefins are polymerized under solution polymerization conditions in the presence of the solid catalytic product resulting from removing the liquid components from the product resulting from...
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5106926 |
Preparation of ethylene/1-octene copolymers of very low density in a fluidized bed reactor
A process for preparing ethylene/1-octene copolymers using a titanium based catalyst system under defined polymerization conditions.
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5106927 |
Process for producing ethylene/propylene/ethylidene norbornene rubbers
A process for the production of EPDM comprising reacting ethylene, propylene, ethylidene norbornene, and hydrogen, in the gas phase, in a fluidized bed, under polymerization conditions, in the...
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5091353 |
Process for producing ethylene copolymer
An improved process for producing an ethylene copolymer composed of a major proportion of ethylene and a minor proportion of an alpha-olefin having 3 to 10 carbon atoms and having a density of...
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5084540 |
Ethylene/butene-1 copolymers
Crystalline copolymers of ethylene and alpha-olefins CH 2 CHR in which R is an alkyl group having 2 to 8 carbon atoms, containing 0.5 to 3% by moles of polymerized alpha-olefin and having a...
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