Patents in Class 526/152

Matches 1 - 50 out of 80

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Match	Document	Document Title
1	7151146	Neodymium-carbon nanotube and method of preparing high 1,4-cis-polybutadiene using the same The present invention relates to a method for preparing neodymium-carbon-nanotube and a process for preparing 1,4-cis-polybutadiene utilizing the same and more particularly,...
2	6806220	High activity carbenium-activated polymerization catalysts This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalyst precursors are activated into olefin...
3	6762255	Prealkylated olefin polymerization catalysts and olefin polymerization employing such catalysts Prealkylation of a supported catalyst system comprising a transition metal or inner transition metal complex precatalyst and a bulky, non-coordinating anion on an inorganic support by treatment...
4	6653430	Butadiene polymers and process for producing conjugated diene polymers A butadiene polymer (i) having a cis bond unit content of at least 50% based on the total butadiene units, a number average molecular weight (Mn) of 1,000 to 10,000,000, and at least 80%, based on...
5	6646074	Process for the continuous gas-phase (co-) polymerisation of olefins in a fluidized bed reactor A process for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a Ziegler-Nata type catalyst wherein the polymerisation is performed in the presence of a...
6	6576723	Catalyst system and its use for the polymerization of propylene A catalyst system which can be used in the polymerization of propylene comprises at least one metallocene as a rac/meso isomer mixture, at least one organoboroaluminum compound, at least one...
7	6531553	Process for increasing molecular weight in polyolefins using Ziegler-Natta catalysts and lithium compounds This invention relates to a conventional supported heterogeneous Ziegler-Natta catalyst for the polymerization of olefins. It has been found that adding a lithium compound to a transition metal...
8	6353056	Method for the production of block copolymers by retarded anionic polymerization In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal...
9	6225427	Olefin polymerization process employing metallocene catalyst provided by cocatalyst activation of a metallocene procatalyst A polyolefin elastomer possessing a unique combination of properties, i.e., high molecular weight (Mw), high Mooney viscosity (ML1+4 at 125° C.), low polydispersity index (Mw /Mn) and low glass ...
10	6127495	Preparation of polymers of C2 -C12 -alkenes with the addition of a reaction retarder Polymers of C2 -C12 -alkenes are prepared at from -50 to 300° C. and from 0.5 to 3000 bar in the presence of a catalyst system by a process in which a compound of the general formula I ##STR1## ...
11	6080819	Blends of olefin polymers and syndiotactic vinyl polymers Blends of olefin polymers and syndiotactic vinyl polymers are produced by the catalytic polymerization of olefins and aromatic vinyl compounds or methacrylate esters as vinyl compounds in inert...
12	6077804	Olefin polymerization catalyst and process for preparing polyolefins According to the present invention, there are provided a catalyst and a process for the preparation of polyolefins having a relatively wide molecular weight distribution, good particle properties,...
13	6040399	Preparation method of ethylene base polymer An ethylene base polymer and a preparation method of an ethylene base polymer characterized in use of a catalyst comprising a chromium amide compound, a solid inroganic oxide calcined at 100 to...
14	6022935	Preparation of polymers of alk-1-enes in the presence of a supported metallocene catalyst system and of antistatic agent Polymers of C2 -C12 -alk-1-enes are prepared at from -50 to 300° C. and from 0.5 to 3000 bar in the presence of a catalyst system by a process in which the catalyst system used is one which ...
15	5907021	High temperature olefin polymerization process A polymerization process for olefinically or acetylenically unsaturated monomers is disclosed. The process comprises contacting the one or more of the monomers with a suitable ionic catalyst system...
16	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 M1 (OR1)p R2q X14-p-q, M1...
17	5808013	Process for the preparation of N-alkyl substituted metal carbamate solutions and their use Process for the preparation of N-alkyl substituted metal carbamate solutions characterized in that a water solution of the salt of the metal of which the corresponding carbamate is to be obtained,...
18	5733979	Catalytic solid usable for the stereospecific polymerisation of alpha-olefins, process for preparing it and process for polymerising alpha-olefins in its presence Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerisation of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent,...
19	5700749	Process for polymerizing olefins This invention relates to a process for polymerizing olefins using a catalyst composed of a transition metal catalyst component, an aluminoxane component and an organoaluminum component. In the...
20	5670587	Catalyst for producing aromatic vinyl compound-based polymer composition and process for producing aromatic vinyl compound-based polymer composition using same There are disclosed a catalyst for producing an aromatic vinyl compound-based polymer composition which catalyst comprises (A) at least two different transition metal compounds each having one...
21	5527751	Polymerization catalyst and method for producing polyolefin or olefin block copolymer using the same A polymerization catalyst comprising a reaction product of an organic rare earth metal compound of the formula (I), Cpa Lxb Mc Dd (I)(wherein in the formula (I), Cp is a substituted or...
22	5506184	Olefin polymerization catalyst system A catalyst composition for olefin polymerization and copolymerization which contains a transition metal complex with a bidentate or a tridentate ligand and a cocatalyst mixture containing...
23	5391660	Process for preparing polyolefines Polyolefins having a high molecular weight, an appropriate molecular weight distribution and a relatively narrow composition distribution are prepared in high activity.The polymerization of an...
24	5235011	Polyolefin polymerization process, method of producing catalyst, and catalyst A process for preparing a polymerization catalyst useful for the polymerization of olefins is provided comprising contacting a metal dihalide compound wherein the metal is selected from Group 2 and...
25	5109085	Olefin polymerization process A process for polymerizing olefins is disclosed which makes use of a catalyst comprising a cyclopentadienyl lanthanide halide alkali metal ether complex in combination with a cocatalyst comprising...
26	4900798	Preparation of ethene polymers using a ziegler catalyst system Finely divided ethane polymers are prepared using a Ziegler catalyst system consisting of (1) a titanium-containing catalyst component which has been obtained by (1.1) precipitation in an organic...
27	4857612	Process for the polymerization of alpha olefins A process for the stereoregular polymerization of alpha olefins which comprises polymerizing an alpha olefin having from 2 to 8 carbon atoms in the presence of a catalyst comprising: (a) a solid...
28	4820786	Process for the preparation of linear low density polyethylene A process for the preparation of linear low density polyethylene by the copolymerization of ethylene and 1-butene which comprises contacting ethylene with a feedstock comprising 1-butene in the...
29	4476288	Catalysts comprising magnesium and a transition metal A catalyst comprising the product obtained by bringing into contact (a) a compound of magnesium comprising at least one species selected from the group consisting of magnesium monohalides (MgX),...
30	4381252	Catalyst for producing polyolefins A catalyst suitable for polymerizing an α-olefin, comprising a solid catalyst component [A] and an organometal compound [B], the solid catalyst component [A] being prepared by reacting an ...
31	4329256	Process for the manufacture of a mixed catalyst A catalyst system of such high efficiency that the purification of the polymer can be dispensed with is obtained by first reacting a magnesium halide with an electron donor and/or a cyclopolyene,...
32	4297465	Catalysts for polymerizing propylene in a high temperature solution process This invention relates to improved catalysts for the polymerization of propylene and higher α-olefin in a high temperature solution process comprising (1) a beta amino carboxylic ester, (2) an ...
33	4276400	Olefin polymerization process using pretreated catalyst Process for polymerizing alpha-olefins employing a pretreated catalyst comprising an organopolylithiumaluminum compound prepared by reacting lithium compounds selected from the group consisting of...
34	4210738	Catalytic complexes Solid catalytic complexes are useful for stereospecific polymerization of α-olefins to solid crystalline polymers. The complexes are formed by reducing TiCl4 with an alkylaluminum, treating ...
35	4166167	Polymerization of α-olefin monomers Gas-phase polymerization of an α-olefin, especially propylene, in a stirred or fluidized bed of substantially uniform and approximately spherical carrier particles of an α-olefin polymer of d...
36	3939132	Process for the preparation of random copolymers of mono-olefins or of mono-olefins and unconjugated dienes with unsaturated derivatives selected from N-vinylimidazoles and N-vinylimidazolines A process is described for the preparation of substantially linear, amorphous random copolymers of mono-olefins or mono-olefins and unconjugated dienes with unsaturated nitrogen derivatives...
37	3923758	Substantially hexane soluble propylene/butene-1 copolymer containing 30 to 75 weight percent butene-1 An amorphous propylene/butene-1 copolymer containing from about 30 to about 75 weight percent butene-1, and having a melt viscosity of about 100 to 100,000 centipoise at 190°C., a solubility in ...
38	3912703	Modification of polymers by treatment with olefins Polymers containing internal unsaturation are modified by treatment with a lower molecular weight olefin in the presence of an olefin disproportionation catalyst.
39	3900456	Polyisoprene Isoprene is polymerized by the use of a catalyst system including a Group IA metal alkyl, an aluminum halogen compound, and a tetravalent titanium salt.
40	3705138	PROCESS FOR THE PREPARATION OF AMORPHOUS COPOLYMERS OF ETHYLENE A process for the preparation of amorphous copolymers of ethylene, one or more other α-alkenes, and optionally one or more compounds containing more than one CC bond, using a catalyst co...
41	3679775	OLEFIN POLYMERIZATION PROCESS AND CATALYST Process for polymerizing alpha-olefins employing a catalyst comprising organopolylithiumalumaluminum compound prepared by reacting lithium compounds selected from the group consisting of lithium...
42	3674754	VULCANIZABLE ETHYLENE/PROPYLENE COPOLYMERS AND PROCESS FOR THEIR PREPARATION There are disclosed new vulcanizable copolymers of ethylene and propylene containing unsaturations resulting from the presence therein of units deriving from the mixture obtained by the catalytic...
43	3674765	PROCESS FOR POLYMERIZING ALPHA-OLEFINS This invention relates to an improved catalyst composition, method of making same, and a process for polymerizing α-olefins using the catalyst composition. A transition metal halide catalyst, such ...
44	3518237	ETHYLENE COPOLYMERISATION CATALYST
45	3708551	OLEFIN CONVERSION USING RARE EARTH METAL HALIDES WITH ORGANOALUMINUMS
46	3558515	COMPLEXES OF MN,TC,AND RE WITH ORGANOALUMINUM AS OLEFIN REACTION CATALYSTS
47	3787384	CATALYSTS AND PROCESS FOR THE POLYMERIZATION OF OLEFINS
48	3644309	HYDROCARBON-SOLUBLE RUBBERY COPOLYMERS OF ALPHA-OLEFINS
49	3746694	NOVEL CATALYST SYSTEM FOR THE PREPARATION OF SULFUR-CURABLE TERPOLYMERS
50	3478008	PREPARATION OF PROPYLENE HAVING INTERMEDIATE CRYSTALLINITY WITH A CATALYST COMPRISING (1) TICL4-METAL HYDRIDE-ALKYL ALUMINUM HALIDE AND (2) ALUMINUM TRIALKYL

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