Abstract: A catalytic component for olefin polymerization, produced by a process which comprises causing (A) magnesium metal, (B) a halogenated hydrocarbon represented by the general formula, RX [wherein R stands for an alkyl group, an aryl group, or a cycloalkyl group each having 1 to 20 carbon atoms and X for a halogen atom], and (C) a compound represented by the general formula, X.sub.n.sup.1 M(OR.sup.1).sub.m-n [wherein X.sup.1 stands for a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 20 carbon atoms, M for a boron, carbon, aluminum, silicon, or phorphorus atom, R.sup.1 stands for a hydrocarbon group having 1 to 20 carbon atoms, m for the valency of M, and m>n.gtoreq.

Abstract: A Zeigler-Natta type catalyst suitable for polmerizing propylene comprising a preactivated support coated with 0.1 to 10 g of homopolymer or copolymer of propylene. The preactivated support which comprises magnesium chloride and 1 to 20% by mol of an electron donor free from labile hydrogen and from ester function, is in the form of spherical particles having a mean diameter by mass of 10 to 100 microns and a ratio of the means diameter by mass to the mean diameter by number of less than 2.0. The preactivated support is treated with at least one internal electron donor compound and coated by contacting the treated support with an alkyl aluminium halide and propylene, optionally together with ethylene and/or a C.sub.4-8 alpha-olefin, in the absence of an external electron donor compound.

Abstract: This invention reveals a technique for preparing syndiotactic 1,2-polybutadiene latex. It more specifically discloses a process for synthesizing syndiotactic 1,2-polybutadiene latex by polymerizing 1,3-butadiene in an aqueous medium in the presence of (1) at least one emulsifier, (2) a catalyst emulsion composition which is prepared by a microfluidization or microemulsification process, and (3) at least one member selected from the group consisting of carbon disulfide and phenyl isothiocyanate. Such syndiotactic 1,2-polybutadiene latices can be utilized in preparing blends of syndiotactic 1,2-polybutadiene with rubbers which are prepared by emulsion polymerization.

Abstract: High density polymers of ethylene are produced in improved yields employing a solid Ziegler type transition metal-containing catalyst component and an organoaluminum cocatalyst in the presence of a small amount of an aliphatic diene having at least 4 carbon atoms and a terminal double bond. The amount of diene is from about 0.01 to about 3000 mole per gram atom of transistion metal in the catalyst component. The catalyst component variously may be pretreated with the diene before using the component for homopolymerization, may be prepolymerized with ethylene in the presence of the diene, may be prereduced in the presence of the diene, or the diene may be added to the polymerization reaction. Preferred dienes are .alpha.-.omega.-dienes.

Abstract: An olefin polymerization catalyst component subjected to successive preliminary polymerization treatment using each of a straight chain alpha-olefin having 2 to 5 carbon atoms and 3-methyl-1-butene; an olefin polymerization catalyst using the olefin polymerization catalyst component; a process for polymerizing olefin(s) which comprises polymerizing or copolymerizing olefin(s) in the presence of the olefin polymerization catalyst; and a film and an injection-molded article of polypropylene which is prepared by the process are also provided.

Abstract: 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 donor as essential ingredients, (B) an organoaluminum compound catalyst component, and as required, (C) an electron donor with an alpha-olefin by preliminarily polymerizing the alpha-olefin in an amount of 0.1 to 500 g per gram of the solid titanium catalyst component (A) in the presence of said catalyst (X), and contacting the treated catalyst (X') with at least 0.1 mole, per gram-atom of titaninum in the treated catalyst (X"), of oxygen. A process for producing the olefin polymerization catalyst component. A catalyst (Y) for olefin polymerization formed from [I] the above catalyst component (X"), [II] an organoaluminum compound catalyst component and as required [III] an electron donor. Also provided is a process for polymerizing olefins in the presence of the olefin polymerization catalyst (Y).

Abstract: Catalysts compositions enabling the production of polyalkenes with improved bulk density are prepared by combining the following catalyst components in the following order of addition: first introducting an electron donor component, then adding a reaction product of a di-alkylaluminium halide and a solid component comprising a magnesium di-halide, an electron donor and a halide of tetravalent titanium and lastly adding a tri-alkylaluminium compound.

Abstract: A catalyst useful in the polymerization of olefinic compounds and particularly 4-methyl-1-pentene is disclosed along with its method of preparation and use. The catalyst is prepared by (a) forming a first component by reacting reactants comprising a magnesium dihalide, a phenol, and alkylbenzoate, and a titanium tetrahydrocarbyloxide; (b) reacting the first component with an organoaluminum halide compound to produce a solid product; and (c) then contacting the resulting solid product with an activating liquid comprising titanium tetrachloride and trichlorosilane in a confined zone under pressure of at least 70 psi.

Abstract: There is provided a process for polymerization of an .alpha.-olefin which comprises polymerizing an .alpha.-olefin in the presence of a catalyst which is a combination of a solid component (A), which is obtained by subjecting a composition (A.sub.O) comprising as the essential ingredients titanium, magnesium and a halogen to preliminary polymerizatoin of the .alpha.-olefin conducted in the presence of said composition in a slurry and an organoaluminum compound, and an organoaluminum compound (B), said preliminary polymerization being conducted in two steps: the first step wherein the concentration of said composition (A.sub.O) in the slurry is adjusted to 10-100 g/lit.-solvent and polymerization of the .alpha.-olefin is conducted at 30.degree. C. or lower so that the amount of a polymer produced is 0.001 to 1 g per gram of said composition and the second step wherein polymerization of the .alpha.-olefin is conducted at 60.degree. C.

Abstract: A process for producing a trivalent titanium compound-containing solid catalyst for use in the polymerization of olefins which comprises treating, with an ester compound, a solid product obtained by reducing a titanium compound represented by the following general formula: ##STR1## (R.sup.1 represents hydrocarbon group having 1 to 20 carbon atoms, X represents halogen atom, and n represents a number satisfying 0<n.ltoreq.4) with an organomagnesium compound in the presence of an organic silicon compound having Si--O bond, and thereafter treating it with a mixture of an ester compound and titanium tetrachloride.

Abstract: A catalyst component for olefin polymerization, prepared by bringing a titanium-containing solid which comprises (a) a metal oxide, (b) an organomagnesium compound represented by the following general formula:R.sup.1 MgR.sup.2wherein R.sup.1 and R.sup.2 each represents a hydrocarbon group containing from 1 to 20 carbon atoms, a halogen atom, or an OR.sup.3 group in which R.sup.3 represents a hydrocarbon group containing from 1 to 12 carbon atoms, provided that R.sup.1 and R.sup.2 do not represent a halogen atom at the same time, (c) an electron donor compound, and (d) a titanium compound having contacted with each other, into contact with (e) an .alpha.-olefin containing 3 carbon atoms or more in the presence of (f) an organoaluminum compound, to thereby contain a poly(.alpha.-olefin) in an amount of from 0.1 to 100 g per gram of said titanium-containing solid.

Abstract: The present invention provides a catalyst system that exhibits unprecedented catalyst efficiencies and control of desired properties in the polymer product. The catalyst system includes a Toho-type, new generation titanium catalyst in combination with an electron donor described by the formula: ##STR1## wherein R.sub.1 is a bulky, basic alkyl or cycloalkyl group containing at least one secondary or tertiary carbon atom; R.sub.2 and R.sub.3 are alkyl or aryl groups; and R.sub.4 is an alkyl group with a primary carbon atom attached to the silicon atom. The system has a catalyst efficiency of at least about 30 kg/g-cat.2h as the Al/Si mole ratio varies from 20-200 in the system. The system easily achieves efficiencies over 60 kg/g-cat.2h. The system also exhibits good control over the xylene solubles, melt flow and molecular weight distribution of the polymer product.

Abstract: This invention is a catalyst for polymerization of olefins, comprising a compound of a transition metal of Group IVB of the periodic table, an aluminoxane and a particulate organic or inorganic compound carrier.This catalyst shows very high activity in the polymerization and copolymerization of olefins and gives polymers having a high bulk density, a uniform particle size, a low content of fine particles and a narrow molecular weight distribution and in the case of copolymers, a narrow composition distribution as well.

Abstract: Adducts of a trialkylaluminum or a dialkylaluminum hydride and diisoalkenyl benzene compounds have been discovered. Catalyst components for the polymerization of olefins have also been developed which comprise, as the cocatalyst, the reaction product of a trialkylaluminum or a dialkylaluminum hydride (e.g., diisobutylaluminum hydride) and an alkenyl-substituted benzene (e.g., diisopropenyl benzene).

Abstract: A catalyst for olefin polymerization which comprises:Component (A) which is a solid catalyst component obtained by contacting the following components (i) to (iv):(i) a solid component comprising titanium, magnesium and halogen as essential elements,(ii) a silicon compound represented by the formula (I):R.sup.1.sub.m X.sub.n Si(OR.sup.2).sub.4-m-n (I)wherein R.sup.1 and R.sup.2 each represent a hydrocarbon residue, X represents a halogen, and each of m and n is an integer in the range of 0.ltoreq.m.ltoreq.3, 0.ltoreq.n.ltoreq.3, and 0.ltoreq.m+n.ltoreq.3,(iii) a titanium compound or a silicon compound represented by the formula (II) or (III):Ti(OR.sup.3).sub.4-l X.sub.l (II)R.sup.4.sub.4-l SiX.sub.l (III)wherein R.sup.3 represents a hydrocarbon residue, R.sup.4 represents hydrogen or a hydrocarbon residue, X represents a halogen, and l is an integer in the range of 0<l.ltoreq.4, and(iv) an organoaluminum compound; andComponent (B) which is an organoaluminum compound.

Abstract: The supported catalyst for the polymerization of 1-alkenes is obtained by a consecutive depositing on the insert inorganic oxide of silicium and/or aluminium at least one organic compound of aluminium, at least one compound of titanium and vanadium and at least one organic compound of aluminium and/or magnesium. It can be phlegmatized by 0.5-50% w/w of the paraffinic hydrocarbon having melting point 25-150.degree. C., which is coated either together with active components of the catalyst or separately. The catalyst polymerize and copolymerize ethylene without any additional activation.

Abstract: A process for producing a solid catalyst for polymerization of olefins, which comprises bringing a solution of an aluminoxane into contact with a suspension of a particulate carrier having supported thereon a compound of a transition metal of Group IVB of the periodic table in a solvent in which the aluminoxane is insoluble or sparingly soluble. In another aspect, the invention provides a process for producing a solid catalyst for polymerization of olefins, which comprises bringing a suspension of a particulate carrier having supported thereon a compound of a transition metal of Group IVB of the periodic table in a solution of an aluminoxane into contact with a solvent in which the aluminoxane is insoluble or sparingly soluble.

Abstract: Disclosed is a process for preparing high molecular weight ethylene-.alpha.-olefin elastomers, preferably an ethylene-propylene elastomer, by liquid phase polymerization of the requisite monomers in the presence of a metallocene/alumoxane catalyst system. Preferably, the process is carried out as a slurry polymerization utilizing the metallocene/alumoxane catalyst in supported form on a silica gel support with the .alpha.-olefin monomer maintained in liquid state and used in excess to serve as a polymerization diluent. The metallocene component of the catalyst by which the process is practiced is of the formula: ##STR1## wherein M is zirconium, titanium or hafnium; each R.sup.1 independently is a C.sub.1 -C.sub.20 linear, branched or cyclic alkyl group or a C.sub.2 -C.sub.4 cyclic alkylene group which forms a fused ring system group; R.sup.2 is a C.sub.1 -C.sub.6 linear, branched or cyclic alkylene, a Si.sub.1 -Si.sub.

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: Aluminum-containing compositions for use particularly as olefin polymerization or copolymerization cocatalysts are produced by reaction of trialkylaluminums or dialkylaluminum hydrides with 1,3- or 1,4-pentadiene at a mole ratio of aluminum compound to pentadiene of approximately 1:1, with removal during the reaction of evolved olefin.

Abstract: A catalyst component for polymerization of olefin, comprising a contact product of a component (A) which is a solid component containing titanium having at least one OR.sup.1 group (where R.sup.1 represents a hydrocarbon residue) and magnesium and a halogen as the essential components; a component (B) which is an acid halide compound; a component (C) which is a compound having an OR.sup.2 group (where R.sup.2 represents a hydrocarbon residue or hydrogen atom); and a component (D) which is a halide compound of silicon. When an olefin is polymerized by use of this as the transition metal component of a Ziegler type catalyst, an olefin polymer with high activity and high I.I and excellent polymer properties can be obtained.

Abstract: A catalyst for olefin polymerization which comprises a combination of:Component which is a solid catalyst component A obtained by contacting a component (i) which is a solid component comprising titanium, magnesium and halogen as essential elements with a component (ii), which is a silicon compound represented by formula: R.sup.1 R.sup.2.sub.3-n Si(OR.sup.3).sub.n where R.sup.1 stands for a branched hydrocarbon radical, R.sup.2 stands for a hydrocarbon radical which is the same as or different from R.sup.1 and n stands for a number satisfying an equation: 1.ltoreq.n.ltoreq.3;Component B which is an organoaluminum compound; andComponent C which is a compound represented by a formula M(OR.sup.4).sub.x R.sup.5.sub.y X.sub.z in which M stands for an element selected from the group consisting of B, Al, C, Si, Sn, P, S, Cl, Br, I, Fe, Ti, V, Zr, Mg, Ca and Zn, R.sup.4 and R.sup.

Abstract: The present invention relates to an improvement of the known Ziegler catalyst which comprises a combination of a titanium-containing component and an organoaluminum component, and the present invention is characterized by a specific titanium-containing component. Namely, this titanium-containing component is obtained by contacting a known titanium-containing component of the Ziegler type catalyst which comprises Ti, Mg and a halogen, with an alkoxyalkylsilane compound which is characterized in that at least one of the alkyl groups has a branched structure. This catalyst does not require a so-called external electron donor, and no reduction of the polymerization velocity caused by the use of the electron donor is entailed. When this catalyst is used, a propylene/ethylene block copolymer in which the molecular weight of the propylene/ethylene copolymer portion and/or the polyethylene portion is increased, that is, the rigidity and impact strength are increased, can be prepared.

Abstract: A process for pretreating a Ziegler-type catalyst for use in olefin polymerization reactions. An olefin monomer is aded to a fluid carrier stream containing a Ziegler-type catalyst. The carrier stream containing the monomer and the catalyst is passed through an elongated tubular reactor at a flow rate sufficient to provide a residence time in the tubular reactor of less than 1 minute and under temperature conditions to prepolymerize the catalyst within the tubular reactor without plugging of the reactor. In a specific embodiment the residence time within the reactor is no more than 10 seconds, and more particularly, no more than 2 seconds.

Abstract: A process for producing an olefin polymer which comprises the homopolymerizing or copolymerizing an olefin in the presence of a catalyst system composed of an organoaluminum compound and a hydrocarbyloxy group-containing solid catalyst component which is prepared byreducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n, wherein R.sup.1 is a C.sub.1 -C.sub.20 hydrocarbon radical, X is halogen, and n is a number defined as 0<n.ltoreq.4, with an organoaluminum compound represented by the general formula AlR.sup.2.sub.m Y.sub.3-m, wherein R.sup.2 is a C.sub.1 -C.sub.20 hydrocarbon radical, Y is halogen, and m is a number defined as 1.ltoreq.m.ltoreq.3,subjecting the reduction product, which is a hydrocarbyloxy group-containing solid insoluble in hydrocarbon solvents, to a preliminary ethylene polymerization treatment, andtreating the resultant solid in a state of slurry in a hydrocarbon solvent with an ether compound and titanium tetrachloride at a temperature of 30.

Abstract: The present invention relates to a process for polymerizing or copolymerizing alpha-olefins comprising, on the one hand, a prepolymerization stage by contacting one or more alpha-olefins with a Ziegler catalyst system consisting of a solid catalyst containing essentially atoms of halogen, magnesium and transition metal, and a co-catalyst consisting of an organomatellic compound, and, on the other hand, a polymerization or copolymerization stage in a gas phase process by means of a fluidized bed, by contacting one or more alpha-olefins with the prepolymer produced in the first stage, process characterized in that the alpha-olefin prepolymer and polymer or copolymer are in the form of a powder consisting of particles having specific values for the transition metal content and the mean diameter by mass, and characterized in that the particle size distribution of the prepolymer is narrow and easily controlled.

Abstract: Finely divided ethene polymers are prepared by means of a Ziegler catalyst system composed of (1) a titanium-containing catalyst component obtained by precipitation in an organic liquid from (1.1) a solution of titanium tetrachloride in a hydrocarbon, (1.2) a solution of a certain organoaluminum compound in a hydrocarbon, and a catalyst component which contains (1.

Abstract: An aromatic hydrocarbon modified soluble mixed aluminum hydrocarbyl-Lewis base co-catalyst composition comprising (i) at least two different classes of aluminum hydrocarbyls the first being an aluminum hydrocarbyl halide, the second being an aluminum hydrocarbyl hydride and/or aluminum trialkyl and (ii) at least one Lewis base represented by the formula: ##STR1## wherein each Y can be --OR', --NR.sub.2 and R' with the proviso that at least two be --OR' or --NR.sub.2, Z is an alkylene radical forming a 5 or 6 membered ring with the carbonyldioxy group or Z is alkyl substituted alkylene group wherein the alkyl radical can have from 1 to 8 carbon atoms, R is an aryl, allyl or alkyl group having from 1 to 20 carbon atoms and R' is an alkyl, cycloalkyl, aryl or aralkyl radical having from 1 to 20 carbon atoms.The co-catalyst is employed with a titanium halide catalyst for the polymerization of olefins to obtain a advantageous balance of catalytic activity and polymer product stereoregularity.

Abstract: Zirconocene/aluminoxane polymerization/oligomerization catalysts are stabilized against aging prior to use as catalysts by use of at least 1 mole of 3,3,3-trialkyl-1-propene per mole of metallocene.

Abstract: An olefin polymerization catalyst component comprises an organoaluminum-reduced titanium trihalide on which a pretreatment amount of olefin polymer has been placed complexed with an alkyl aliphatic carboxylic acid ester containing 7 to 22 carbon atoms having a structure:R--CO.sub.2 R'wherein R' is an alkyl group containing 3 to about 8 carbon atoms and R is an alkyl group containing 3 to 17 carbon atoms, and treated with a Lewis acid, a chlorocarbon or an haloalkylchlorosilane.

Abstract: A highly active catalyst for olefin polymerization, which is resistant to catalyst poisons contained in olefins as polymerization raw material and according to which the percentage of amorphous polymer formed is small, is provided, which catalyst is obtained byreacting a reaction product (I) of an organoaluminum compound with an electron donor, with TiCl.sub.4,further reacting the resulting solid product (II) with an electron donor and an electron acceptor,mixing the resulting solid product (III) with an organoaluminum compound in an inert solvent,keeping the resulting catalyst dispersion at 0.degree. to 70.degree. C., andhaving a small amount of an .alpha.-olefin and an extremely small amount of carbonyl sulfide slowly absorbed in the dispersion kept as above, to thereby subject the dispersion to a preliminary polymerization.

Abstract: Ethylene and alpha-olefins are homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising an organo metal cocatalyst and a titanium-containing catalyst component, said titanium-containing catalyst component being obtained by reacting together a porous particulate material, an organic magnesium compound, an oxygen containing compound, an acyl halide and titanium tetrachloride and a Group IIIa hydrocarbyl metal dihalide and prepolymerizing the solid with a minor amount of ethylene.

Abstract: A catalyst, a process of forming the catalyst, and polymerizing at least one alpha-olefin with the catalyst, said catalyst produced by precipitating a composition from a solution of a metal halide, for example, magnesium dihalide, and a transition metal compound, for example, titanium tetraalkoxide, in the presence of a particulate diluent, for example, polymeric fibrils, with an agent selected from among specified organometallic compounds, metal halides and oxygen-containing metal halides, hydrogen halides and organic acid halides. The composition is preferably further treated with a halide ion exchanging source, for example, titanium tetrahalide to form a particularly active catalyst. The catalyst is preferably used in combination with a cocatalyst comprising a metal hydride or organometallic compound selected from an element of Periodic Groups IA, IIA and IIIA.

Abstract: A process for producing .alpha.-olefin polymers is proposed wherein the catalyst prepared and used therein is superior in the shelf stability and heat stability. The process comprises reacting TiCl.sub.4 with a reaction product (I) of an organoaluminum compound with an electron donor to obtain a solid product (II), which is then subjected to polymerization treatment with an .alpha.-olefin, and further reacted with an electron donor and an electron acceptor to obtain a solid product (III), which is then combined with an organoaluminum compound, to obtain a catalyst, in the presence of which .alpha.-olefin(s) are polymerized. The catalyst can be further preactivated with an .alpha.-olefin in advance of its use for the polymerization.

Abstract: A solid catalyst component for .alpha.-olefin polymerization which, when produced, causes any troubles due to its small particle size and when used, yields a spherical polymer of a suitably less particle size and a high bulk density with a slightest quantity of atactic polymer and affording a very good dispersibility of powdery additives therein in spite of its narrow particle size distribution, and a process for producing the same, are provided, which solid catalyst component comprises Ti and Cl as active ingredients, having an average particle diameter of 2 to 10.mu., a specific surface area of 100 m.sup.2 /g or more and a diffraction line corresponding to a distance between lattices of 4.80 to 5.10 .ANG. by way of X-ray diffraction; and which process is characterized in that when TiCl.sub.4 is reduced with a reducing agent comprising an organoaluminum compound to produce a solid intermediate, there is employed an agitation intensity defined by definite values of agitation power and baffle ratio.

Abstract: An exhaustively prepolymerized supported olefin polymerization catalyst component comprises solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing catalyst particles which have been contacted with an olefin monomer and an organo-aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.

Abstract: Process for the preparation of an active solid hydrocarbon which can be used to polymerize olefines.This process comprises forming a pulverulent composition by mixing a transition metal component, a porous organic or inorganic solid support and an organometallic compound of the organo-Al, organo-Mg or organo-Zn type, and polymerizing a controlled amount of one or more C.sub.2 to C.sub.12 olefines in the gas phase in contact with the pulverulent composition with a specific hourly conversion of the olefines to produce the active solid hydrocarbon.The above active solid hydrocarbon can be used, by itself or together with an organometallic cocatalyst, as a catalytic system for polymerization of olefines, in particular in the gas phase.

Abstract: A process for producing an .alpha.-olefin polymer which comprises polymerizing an .alpha.-olefin in the presence of a catalyst system comprising(A) a solid catalyst component obtained by steps of(i) reducing titanium tetrachloride with an organoaluminum compound represented by the general formula R.sup.1.sub.n AlY.sub.3-n, wherein R.sup.1 represents a C.sub.1 -C.sub.18 hydrocarbon group, Y represents a halogen, and n represents a number satisfying 1<n<3,(ii) heating the reduction product at a temperature of up to 150.degree. C.,(iii) treating the thus obtained solid product containing .gamma.-titanium trichloride by preliminary polymerization of an .alpha.-olefin in the presence thereof, and(iv) reacting the resulting solid product with a halogen represented by the general formula X.sub.

Abstract: Composition comprising a transition metal component and magnesium hydrocarbyl carbonate. Composition can be prepared by reacting suspension of magnesium alcoholate with carbon dioxide to form a magnesium hydrocarbyl carbonate and reacting magnesium hydrocarbyl carbonate with transition metal component. When the suspending liquid comprises an alcohol, the magnesium hydrocarbyl carbonate dissolves and is subsequently precipitated with an antisolvent comprising metal alkyl or transition metal halide. When the suspending liquid is substantially free of alcohol, the magnesium hydrocarbyl carbonate suspension is reacted with metal alkyl and transition metal compound.

Abstract: A process for preparation of a transition metal component of a catalytic system for the polymerization of olefins, wherein an organo-magnesium-aluminum reaction product is formed by bringing into contact, a halogenated, alkylated or alkoxylated magnesium compound with an organo-aluminum compound, then subjecting the reaction product to a chlorination and to a treatment by a compound of a transition metal such as Ti, V, Zr and Cr.As an organo-aluminum compound there is used one or several aluminoxane compounds of the formula ##STR1## wherein R' is an alkyl or from C.sub.1 to C.sub.16, the R"s form together a radical --O-- or designate each a radical R' and n is an integer of from 0 to 20.The transition metal component obtained can be used in combination with a co-catalyst and eventually an electron donor to form a catalytic system apt to polymerize the alpha-olefins.

Abstract: A supported type catalyst component for .alpha.-olefin polymerization, having a higher activity and capable of affording a highly stereoregular polymer is provided, which component comprises a solid product (II) obtained by reacting Mg compound(s) of formula MgR.sup.1 R.sup.2 (wherein R.sup.1 is alkyl, aryl, alkoxy or aryloxy and R.sup.2, alkyl, aryl, alkoxy, aryloxy or halogen), with a complex of compound(s) selected from Al halides and Al compounds of formula AlR.sub.n.sup.3 X.sub.3-n (wherein R.sub.3 is alkyl, aryl, alkoxy or aryloxy; X, halogen; 0.ltoreq.n<2) with an organic acid ester; and reacting the resulting solid product (I) (a carrier) with a liquid halogen-containing Ti compound. Preactivation of the solid product (II) with an organoaluminum compound and an .alpha.-olefin affords a catalyst component superior in storage stability and polymerization reproducibility.

Abstract: A process for producing .alpha.-olefin polymers having high crystallinity and good particle form, with a high yield is provided. The polymerization therefor is carried out in the presence of a preactivated catalyst suitable particularly to gas phase polymerization or gas phase polymerization following slurry or bulk polymerization.The catalyst is prepared by reacting a reduction solid prepared by reducing TiCl.sub.4 with an organoaluminum compound, with an electron donor and an electron acceptor to obtain a solid product, andcombining this solid product with an organoaluminum compound, an .alpha.-olefin and a reaction product of an organoaluminum compound with an electron donor.

Abstract: A method is disclosed for increasing the productivity of an olefin polymerization catalyst. The catalyst contains an aluminum chloride co-crystallized titanium halide. The catalyst component is simultaneously washed with an olefin and electron donor is added to the catalyst component, thereby greatly increasing its productivity without significantly adversely affecting the crystallinity of the polymer produced.

Abstract: A preactivated catalyst for producing .alpha.-olefin polymers is provided, which is obtained by the steps which comprises:reacting an organoaluminum compound (O-Al.sub.1) with an electron donor (ED.sub.1) to obtain a reaction product (I);reacting (I) with TiCl.sub.4 to obtain a solid product (II);reacting (II) with an electron donor (ED.sub.2) and an electron acceptor to obtain a solid product (III);combining (III) with an organoaluminum compound (O-Al.sub.2) and a reaction product (RP) of an organoaluminum (O-Al.sub.3) with an electron donor (ED.sub.3) (III), (O-Al.sub.2) and (PP) being referred to as catalyst components), and in this combination, subjecting a part or the whole of the catalyst components to polymerization treatment with an .alpha.-olefin at least in the presence of (III) and said (O-Al.sub.2) to obtain a preliminarily activated catalyst; andpolymerizing an .alpha.-olefin in the presence of the catalyst.

Abstract: A catalyst component for polymerizing ethylene alone or with another alpha-olefin having from 3 to 18 carbon atoms at temperatures greater than about 150.degree. C. which catalyst component is the product obtained by treating at least one dehydrated particulate support material, such as silica, having an average particle size from about 0.05 to about 20 microns, preferably 1.0 to 10.0 microns, with(a) at least one dihydrocarbyl magnesium compound wherein the hydrocarbyl groups can be the same or different, such as butyl ethyl magnesium,(b) a transistion metal compound of Groups IVa, Va, or VIa of the Periodic Table, such as, for example, titanium tetrachloride, and (c) ethyl aluminum dichloride. In a preferred embodiment the particulate support material is treated with a halogenating agent prior to treatment with the transition metal compound.

Abstract: A catalyst component useful for (co)polymerizing ethylene under high temperatures and pressures comprising the reaction product obtained by treating a magnesium halide supported titanium halide precursor with transition-metal halide or oxyhalide, thoroughly washing the solid reaction product therefrom and prepolymerizing the washed solid product with an alpha-olefin having from 4-12 carbon atoms.

Abstract: A process is disclosed for producing, in situ and without milling or grinding, an alpha olefin polymerization catalyst component which comprises adding an olefin to a titanium halide and then adding an electron donor to the mixture of the titanium halide and the olefin.

Abstract: Extremely strong, i.e., non-friable TiCl.sub.3 Ziegler-type polymerization catalyst are obtained by prepolymerizing a reduced solid TiCl.sub.3 product with a mixture of propylene and linear C.sub.8 -C.sub.18 alpha-olefin to produce a reduced solid TiCl.sub.3 product containing 5 to 35 weight percent of a copolymer of propylene and C.sub.8 -C.sub.18 alpha-olefin having a ratio of the infrared spectrum of the copolymer at 720 cm.sup.-1 : the infrared spectrum of the copolymer at 975 cm.sup.-1 in the range of 0.04 to 0.20.

Abstract: Ethylene is oligomerized to linear, alpha-olefins by reacting ethylene in liquid phase solution in the presence of a catalyst composition produced by contacting in the presence of ethylene (1) a simple divalent nickel salt, (2) a boron hydride reducing agent, and (3) an o-dihydrocarbylphosphinophenyl alcohol or lower alkyl ether.

Abstract: A method is disclosed for increasing the productivity of an olefin polymerization catalyst. The catalyst contains an aluminum chloride co-crystallized titanium halide modified with an electron donor containing an ester group. The catalyst component is washed with an olefin and then electron donor is added back to the washed catalyst component, thereby greatly increasing its productivity without significantly adversely affecting the crystallinity of the polymer produced.