Abstract: A production process of a pre-polymerized catalyst component, comprising steps of (i) contacting a transition metal compound defined by formula [1], an activation agent, an organometallic compound defined by formula [2], and an optional organoaluminum compound with one another, thereby forming a primary polymerization catalyst, and (ii) pre-polymerizing an olefin in the presence of the primary polymerization catalyst; and a process for producing an addition polymer, comprising a step of polymerizing an addition polymerizable monomer in the presence of a pre-polymerized catalyst component produced by the above production process, or in the presence of the pre-polymerized catalyst component and an organoaluminum compound.

Abstract: 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, neodymium-carbon-nanotube. Neodymium is introduced by coordination with carboxylic acid, which is formed on the surface of carbon nanotube. In 1,3-butadiene polymerization with the neodymium-catalyst comprising the neodymium-carbon nanotube, a particular halogen compound, and a particular organometallic compound in an appropriate ratio, high 1,4-cis polybutadiene having molecular weight of 10,000 to 2,000,000 is produced, which exhibits excellent mechanical properties such as elasticity and durability.

Abstract: A catalyst for bulk polymerization comprising an organometallic compound represented by specified formula and a thiol is provided. The specified organometallic compound is a metallocene compound such as titanocene or zirconocene. The use of this bulk polymerization catalyst comprising a metallocene compound and a thiol enables stable bulk polymerization of a polymerizable unsaturated compound such as an acrylic monomer, the reaction control of which has been difficult in the bulk polymerization of the prior art.

Abstract: 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 polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyst precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: 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 with a solution of metal alkyl in a ratio of metal of metal alkyl to transition metal or inner transition metal of precatalyst less than 20:1, and in an amount of solution insufficient to form a paste or dispersion provides supported catalysts of high olefin polymerization activity which promote production of polyolefins of low polydispersity and improved morphology.

Abstract: A process is described for the hydrogenation of olefin double bonds present in polymers and copolymers of conjugated dienes, which comprises putting the above polymer or copolymer of conjugated dienes in contact with hydrogen in an inert solvent, in the presence of a catalytic system, characterized in that the above catalytic system essentially consists of one or more titanium compounds selected from those having general formula (I) 1

Abstract: 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 the total molecular chains, of living chains containing a transition metal of group IV of the Periodic table at a terminal thereof; a polymer (ii) obtained by modifying terminals of the polymer (i); and a polymer (iii) obtained by coupling the polymers (i). These polymers (i), (ii) and (iii) are obtained by polymerizing a conjugated diene monomer alone or with a copolymerizable monomer at a specific temperature in the presence of a catalyst comprising a compound (A) of a transition metal of group IV of the periodic table having a cyclopentadienyl structure and a co-catalyst (B) selected from organoaluminum-oxy compound (a) and others and optionally further by contacting the resultant polymer with a terminal modifier or a coupling agent.

Abstract: 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 process aid additive selected from at least one of (1) a polysulphone copolymer; (2) a polymeric polyamine or (3) an oil-soluble sulphonic acid.

Abstract: 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 passivated support, at least one Lewis base and, if desired, at least one further organometallic compound.

Abstract: 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 catalyst component and then adding an organoaluminum co-catalyst and an organosilicon electron donor produces a catalyst which yields polymer with increased molecular weight. The lithium compound is of the general formula LiCp wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl and is preferably lithium cyclopentadienide or lithium indene. Preferably, the molar ratio of lithium compound/transition metal is at least 0.2.

Abstract: Process for polymerizing alpha-olefins, in which at least one alpha-olefin is placed in contact, under polymerizing conditions, with a catalytic system comprising

Abstract: 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 alkoxide and at least one magnesium, aluminum or zinc organyl.

Abstract: 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 transition temperature (Tg), is obtained by a polymerization process employing a particular type of a metallocene catalyst. The polyolefin elastomer is useful for manufacturing a variety of products including rubber articles such as hoses, belts and moldings, polymer blends containing one or more other hydrocarbon polymers and lubricating oils in which the elastomer functions as a viscosity modifier. Also disclosed is a cocatalyst for activating the metallocene procatalyst employing a specific molar ratio of the components of the cocatalyst to the transition metal of the procatalyst.

Abstract: Polymers of C.sub.2 -C.sub.12 -alkenes are prepared at from -50 to 300.degree. 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## where M.sup.1 is boron, aluminum, gallium, indium or thallium andR.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, alkylaryl or arylalkyl each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, or 5- to 7-membered cycloalkyl which in turn may carry C.sub.1 -C.sub.10 -alkyl as a substituent, or R.sup.1 and R.sup.2 together form a cyclic group, is added of 4 to 15 carbon atoms.

Abstract: 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 diluents in the presence of a catalyst mixture of transition metal compounds, metalloxane compounds and metal alkyl compounds.The blends have a finely dispersed distribution of the blending components and are suitable for the production of films, sheets, fibers, panels, coatings, pipes, hollow objects, injection molded products and foams.

Abstract: 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 500.degree. C. and alumoxane. According to the present invention, an ethylene base polymer with a wide molecular weight distribution, excellent shock and environmental stress cracking resistances, causing no melt fracture, and suitable for film forming and blow molding can be effectively prepared.

Abstract: Polymers of C.sub.2 -C.sub.12 -alk-1-enes are prepared at from -50 to 300.degree. 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 containsA) an inorganic or organic carrier,B) a metallocene complex,C) a compound forming metallocenium ions andD) if required, a metal compound of the general formula IM.sup.1 (R.sup.1).sub.r (R.sup.2).sub.s (R.sup.3).sub.t IwhereM.sup.1 is an alkali metal, an alkaline earth metal or a metal of main group III of the Periodic Table,R.sup.1 is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, alkylaryl or arylalkyl, each having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical,R.sup.2 and R.sup.3 are each hydrogen, halogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.

Abstract: 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 in the presence of a long-chain, linear alkyl ligand-containing organo aluminum compound. Preferred ionic catalysts are derived from 1) bridged hafnium compounds, 2) silicon bridged monocyclopentadienyl titanium compounds and 3) unbridged, bulky Group 15 containing, bulky monocyclopentadienyl titanium compounds, and a non-coordinating anion precursor compound. A class of preferred anion precursors consists of hydrated salts comprising a Group 1 or 2 cation and a non-coordinating anion. Using the preferred ionic catalysts high temperature processes, e.g., at or above 90.degree. C. can be conducted to prepare polyolefins, particularly ethylene copolymers, of both high molecular weight and high comonomer content.

Abstract: 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.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q, M.sup.1 being titanium a second compound of the formula M.sup.2 (OR.sup.3).sub.m R.sup.4.sub.n X.sup.2.sub.z-m-n, with M.sup.2 being a metal of Groups Ia-IIIa or IIb of the Periodic Table, and a third compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing controlled molecular weight, wide distribution thereof and other desirable qualities in the polymer product.

Abstract: 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 in the presence of a long-chain, linear alkyl ligand-containing organo aluminum compound. Preferred ionic catalysts are derived from 1) bridged hafnium compounds, 2) silicon bridged monocyclopentadienyl titanium compounds and 3) unbridged, bulky Group 15 containing, bulky monocyclopentadienyl titanium compounds, and a non-coordinating anion precursor compound. A class of preferred anion precursors consists of hydrated salts comprising a Group 1 or 2 cation and a non-coordinating anion. Using the preferred ionic catalysts high temperature processes, e.g., at or above 90.degree. C. can be conducted to prepare polyolefins, particularly ethylene copolymers, of both high molecular weight and high comonomer content.

Abstract: 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 process of this invention, the catalyst exhibits excellent polymerization activity with the use of a small amount of the aluminoxane xane. The polymerization process gives olefin polymers having a narrow molecular weight distribution and by the copolymerization of two or more olefins, gives olefin copolymers having a narrow molecular weight distribution and a narrow composition distribution.

Abstract: A process for producing an alpha-olefin polymer, which comprises polymerizing an alpha-olefin in the presence of a catalyst formed from (A) a transition metal compound comprising (A-1) a transition metal atom, (A-2) a hetero atom-containing ligand containing a heteroatom selected from oxygen, sulfur, nitrogen and phosphorus capable of forming a bond with the transition metal atom, and (A-3) a ligand having a conjugated .pi. electron through which the ligand can be bonded to the transition metal atom (A-1), and (B) an aluminoxane. The transition metal compound may be pre-treated with (C) an organometallic compound, or (D) a halogen-containing inorganic compound of an element of Group III, IV or V of the periodic table.

Abstract: 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 .pi.-ligand and (B) an ionic compound comprising a noncoordinate anion and a cation and/or an aluminoxane, and (C) a Lewis acid to be used as the case may be; and a process for producing an aromatic vinyl compound-based polymer composition having a high degree of syndiotactic configuration in its aromatic vinyl chains which process comprises polymerizing an (a) aromatic vinyl compound and (b) an olefinic compound and/or a diolefinic compound in the presence of the above catalyst.

Abstract: Disclosed is a novel transition metal compound represented by the following formula: ##STR1## wherein M is a transition metal, X is halogen or the like, R.sup.1 is a hydrocarbon group or the like, R.sup.2 is an aryl group substituted with a halogenated hydrocarbon group, and Y is a divalent silicon-containing group or the like.Also disclosed are an olefin polymerization catalyst component comprising the transition metal compound, an olefin polymerization catalyst comprising the olefin polymerization catalyst component, and a process for olefin polymerization using the olefin polymerization catalyst.An olefin polymerization catalyst component having high polymerization activity can be formed from the transition metal compound. By the use of the olefin polymerization catalyst or the process for olefin polymerization, polyolefins having a high melting point and a high molecular weight can be prepared with high polymerization activity.

Abstract: A polymerization catalyst comprising a reaction product of an organic rare earth metal compound of the formula (I),Cp.sub.a Lx.sub.b M.sub.c D.sub.d (I)(wherein in the formula (I), Cp is a substituted or unsubstituted cyclopentadienyl group, indenyl group, fluorenyl group or their derivatives, or a multidentate coordination compound residue obtained by bonding these groups by way of hydrocarbon or silicon,L is a metal selected from the group consisting of elements having an atomic number of 39 and 57-71,X is a halogen atom,M is an alkaline metal or alkaline earth metal,D is an electron donor,a is 1-2,b is 1-2,c is 0-1, andd is 0-3) with a Grignard reagent of the formula (II),RMgX (II)wherein in the formula (II), R is a hydrocarbon group, and X is a halogen atom); a method for producing a polyolefin or an olefin block copolymer by using the above-mentioned catalyst; and an olefin block copolymer produced by the above-mentioned method.

Abstract: There are disclosed a catalyst for producing an aromatic vinyl compound polymer which catalyst comprises a contact product between an (A) trivalent titanium compound and a (B) compound represented by the general formula (II) or (III)R.sup.1.sub.k M.sup.1 L.sup.2.sub.m (II)R.sup.1.sub.k M.sup.1 X.sup.2.sub.l L.sup.2.sub.m (III)a (C) an ionic compound comprising a noncoordinate anion and a cation, an aluminoxane or an organoboron compound; and optionally a (D) Lewis acid, and a process for producing an aromatic vinyl compound polymer having a high degree of syndiotactic configuration which process comprises polymerizing (a) an aromatic vinyl compound or (b) an aromatic vinyl compound together with an olefin or a diolefin in the presence of the above catalyst.

Abstract: 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 olefin or olefins is performed in the presence of a catalyst comprising a catalyst component and a modified organoaluminum compound, the catalyst component being prepared by mutually contacting (1) a compound of the general formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n and (2) an alkali metal salt of cyclopentadiene or indene and optionally (3) a compound of the general formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.3-m, and the modified organoaluminum compound and water and containing Al--O--Al bond(s).

Abstract: 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 Group 12 of the Periodic Table and a transition metal compound which is a hydrocarbyloxide of a transition metal selected from Group 4 and Group 5 to form a first catalyst component; contacting the first catalyst component with at least one organoaluminum precipitating agent, wherein at least at the commencement of this step, the temperature at which such contacting is carried out is greater than about 70.degree. C. to about 150.degree. C. to form a solid product, and contacting the solid product with an activating agent to form a catalyst. Other aspects of the invention provide a catalyst prepared by the above described method and a polymerization process employing the thus prepared catalyst.

Abstract: 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 an alkali or alkaline earth metal alkyl. Preferred embodiments include the use of hydrogen during the polymerization or the use of an organoaluminum hydride as an additional cocatalyst.

Abstract: A diagnostic test composition for detecting and measuring an analyte possessing biologic activity, the composition comprising(a) A redox catalyst system capable of converting a monomer to a polymer, the monomer capable of undergoing addition polymerization, the redox catalyst system comprising one or more chemical moieties with1) the analyte comprising at least one such moiety or2) in the case that the analyte lacks a redox catalyst property, the analyte is linked by a specific ligand to at least one such moiety or is linked by the specific ligand to a generator of at least one such moiety, and(b) at least one monomer capable of undergoing addition polymerization.

Abstract: A diagnostic test composition for detecting and measuring an analyte possessing biologic activity comprising(a) a photocatalyst system capable of converting a monomer to a polymer upon exposure to light, the monomer capable of undergoing addition polymerization, the photocatalyst system comprising one or more chemical moieties, with(1) the analyte comprising at least one such moiety or generating at least one such moiety or(2) in the case that the analyte lacks a photocatalyst property, the analyte is linked by a specific ligand to at least one such moiety or is linked by the specific ligand to a generator of at least one such moiety and(b) at least one monomer capable of undergoing addition polymerization.

Abstract: 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 liquid comprising (1.1.1) a solution of titanium tetrachloride in a hydrocarbon, (1.1.2) a solution of a certain organoaluminum compound in a hydrocarbon and (1.1.3) an alpha-monoalkene, and (2) an aluminum-containing catalyst component. In this process, the component (1) used is a component where (1.

Abstract: A catalyst for olefin polymerization which comprises: (A) a catalyst component obtained by reacting (a) pentadiene or a derivative thereof with (b) an alkali metal and susequently reacting the reaction product with (c) a titanium compound or zirconium compound, and (B) aluminoxane.

Abstract: 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 supported titanium tetrahalide complex, wherein said complex is prepared by contacting a mechanically pulverized solid support with titanium tetrahalide in the absence of mechanical pulverization, and (b) a cocatalyst comprising a mixture of a dialkyl aluminum halide and a dialkyl magnesium or alkyl lithium compound.

Abstract: 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 presence of a catalyst comprising:(a) a solid supported titanium tetrahalide complex, wherein said complex is prepared by contacting a mechanically pulverized solid support with titanium tetrahalide in the absence of mechanical pulverization, and(b) a cocatalyst comprising a mixture of dialkyl aluminum halide and a dialkyl magnesium or alkyl lithium compound.

Abstract: A catalyst composition for use in polymerizing alpha olefins which comprises a solid supported titanium complex and a cocatalyst comprising a mixture of an alkyl aluminum halide and a dialkyl magnesium or alkyl lithium compound.

Abstract: 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), halo-magnesium hydrides (HMgX) and magnesium hydride (MgH.sub.2), X being a halogen and the said species MgX or HMgX being obtained by thermal decomposition of a powdery organo-magnesium halide R.sub.1 MgX wherein R.sub.1 is an organic radical; and (b) at least one halide of a transistion metal selected from the group consisting of titanium and vanadium, the valency of said metal in said halide being lower than or equal to 3, the quantities of (a) and (b) being such that the atomic ratio of magnesium to said transistion metal is between 1 and 25, and a catalyst system including the catalyst that is suitable for use in the polymerization of olefins and particularly ethylene.

Abstract: A catalyst suitable for polymerizing an .alpha.-olefin, comprising a solid catalyst component [A] and an organometal compound [B], the solid catalyst component [A] being prepared by reacting an organomagnesium compound (1) soluble in a hydrocarbon medium and represented by the general formula,MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.Z.sub.swhereinR.sup.1 is a hydrocarbon group having 2 to 3 carbon atoms;R.sup.2 is a hydrocarbon group having 4 to 20 carbon atoms and the difference in number of carbon atoms between R.sup.1 and R.sup.2 is at least 2;X is an electronegative group having an oxygen atom, a nitrogen atom or a sulfur atom;Z is an organometal compound of aluminum, boron, beryllium, zinc, silicon or lithium;p and q each is a number above 0 to 1;r is a number from 0 to 1;p+q+r=2; ands is a number from 0.02 to 0.09,with a titanium and/or vanadium compound (2) having at least one halogen atom; and a process for polymerizing an .alpha.-olefin employing the same catalyst.

Abstract: 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, bringing the product obtained into contact with a TiCl.sub.3 -containing compound and using a stereoregulator. The system has a high stereospecificity whereby the proportion of atactic polymer is kept low. No excess amount of transition metal halides is required and the polymer obtained has uniform coarse particles and a very low halogen content. spThis is a continuation, of application Ser. No. 54,922 filed July 5, 1979, now abandoned.

Abstract: This invention relates to improved catalysts for the polymerization of propylene and higher .alpha.-olefin in a high temperature solution process comprising (1) a beta amino carboxylic ester, (2) an aluminum trialkyl and (3) a transition metal halide. More particularly, this invention relates to catalysts for the catalytic high temperature solution polymerization of .alpha.-mono-olefins containing at least 3 carbon atoms to form solid, highly crystalline polymers. More specifically, the catalysts of the present invention produce polypropylene in a high temperature solution process at very high polymer to catalysts yields.

Abstract: Process for polymerizing alpha-olefins employing a pretreated catalyst comprising an organopolylithiumaluminum compound prepared by reacting lithium compounds selected from the group consisting of lithium hydride and lithium alkyl with at least one aluminum compound selected from the group consisting of aluminum trialkyl and dialkyl aluminum hydride, an alkyl compound selected from the group consisting of lithium alkyl, aluminum trialkyl and dialkyl aluminum hydride and the alpha form of TiCl.sub.3. This catalyst is pretreated by initially polymerizing alpha-olefins with the catalyst under slurry polymerization conditions to form a small amount of prepolymer. The catalyst and small amount of prepolymer is then used to polymerize alpha-olefins subsequently under solution conditions in solution commercial polymerization processes operated at temperatures above 140.degree. C. over extended periods of time.

Abstract: Solid catalytic complexes are useful for stereospecific polymerization of .alpha.-olefins to solid crystalline polymers. The complexes are formed by reducing TiCl.sub.4 with an alkylaluminum, treating thus-obtained reduced solid with a complexing agent and contacting the resultant with TiCl.sub.4. They have a specific surface greater than 75 m.sup.2 /g.

Abstract: Gas-phase polymerization of an .alpha.-olefin, especially propylene, in a stirred or fluidized bed of substantially uniform and approximately spherical carrier particles of an .alpha.-olefin polymer of diameter 100-500 .mu.m, using a catalyst comprising an organo-metallic compound and a solid transition metal compound which has a particle size of less than 5 .mu.m, produces a propylene polymer having unexpectedly good powder flow characteristics. The transition metal compound is conveniently a titanium trichloride-containing material which has been treated with a dialkyl ether solution.

Abstract: Olefin polymerization catalysts are prepared by depositing a chromium compound and an aluminum compound on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree.C up to the decomposition temperature of the support material. The supported chromium and aluminum compound is then combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.