Abstract: A catalytic component for polymerizing olefins comprises a solid support containing magnesium-halogen or manganese-halogen bonds, a transition metal halide of a metal selected from Groups IVB and VB of the periodic table, and electron donors. This catalytic component is obtainable by steps comprising:(a) contacting a mixture comprising a magnesium halide or manganese halide and at least one electron donor with a Ti(OR).sub.4 compound to form a solution, where R is a hydrocarbyl or halogenated hydrocarbyl moiety containing 1 to 20 carbon atoms or a halogen, and(b) reacting the solution with a reagent comprising a transition metal halide selected from Groups IVB and VB of the periodic table,whereby, with a suitable cocatalyst, polyolefin is formed with high activity, showing a high Isotactic Index, and with a narrow range of particle size distribution.

Abstract: The present invention relates to catalysts for the polymerization and copolymerization of ethylene, characterized in that they comprise a support based on magnesium chloride and possibly on aluminium chloride, of spheroidal shape, having a mean diameter by mass comprised between 10 and 100 microns and with a narrow particle size distribution, such that the ratio of the mean diameter by mass to the mean diameter by number is less than or equal to 3, on which support there has been precipitated a derivative of a transition metal of groups IV, V and VI of the Periodic Table of Elements, and a polymerization process utilizing the said catalysts.

Abstract: A catalyst for polymerizing olefins is the reaction product of (A) the reaction product of (1) the reaction product of (a) an alkyl magnesium compound such as dibutylmagnesium, with (b) an oxygen-containing and/or nitrogen-containing compound such as n-propyl alcohol, or isopropylamine, with (2) a halide source such as titanium tetrachloride or silicon tetrachloride; and (B) a transition metal compound such as titanium tetrachloride and (C) a reducing agent such as triisobutylaluminum.Also disclosed is a non-transition metal containing catalyst support for use in preparing olefin polymerization catalysts.The polymers which are produced in the presence of this catalyst and a cocatalyst such as triethylaluminum have a low catalyst support to transition metal ratio and therefore, the catalyst efficiency based on quantity of polymer per quantity of total catalyst is very high resulting in a polymer having good color and very little, if any, corrosion.

Abstract: The present invention relates to catalyst supports for the polymerization and co-polymerization of alpha-olefins, especially ethylene and propylene, consisting essentially of magnesium chloride, characterized in that these supports occur in the form of spheroidal particles with a mean particle size by mass comprised between 10 and 100 microns and having a narrow particle size distribution, which can be controlled, such that the ratio of the mean diameter by mass to the mean diameter by number of the particles is less than or equal to 3.0, and the process for the preparation of the said supports.

Abstract: The present invention relates to catalyst supports for the polymerization and co-polymerization of alpha-olefins, especially ethylene and propylene, consisting essentially of magnesium chloride, characterized in that these supports contain a chlorinated compound of aluminium in a quantity such that the atomic ratio of Al/Mg is comprised between 0.001 and 0.1 and that they occur in the form of spheroidal particles having a mean diameter by mass comprised between 10 and 100 microns and a narrow and controllable particle size distribution such that the ratio of the mean diameter by mass to the mean diameter by number of particles is less than or equal to 3, and also a process for the preparation of these supports.

Abstract: A novel catalyst system for the polymerization of alpha-olefins is provided. The catalyst system is produced by a process comprising heating to an effective temperature for an effective length of time:(i) an organoaluminum containing component comprising an organoaluminum compound and an electron donor compound, e.g. triethyl aluminum and ethyl anisate, and(ii) a titanium halide containing component obtained by contacting a titanium halide compound, e.g. TiCl.sub.4, or complex of the titanium halide compound and an electron donor compound, e.g. TiCl.sub.4.ethylbenzoate, with a support which comprises as the essential support material thereof an anhydrous bihalide of magnesium or manganese in an active state.The combination of effective temperature and effective time is selected to be sufficient to produce a catalyst system having enhanced stereospecificity.

Abstract: Ethylene is polymerized by a catalyst system comprised of a transition metal complex consisting of at least one binucleating ligand attached to at least one transition metal containing nucleus; and an organometallic cocatalyst containing at least one element of Group IA, IIA or Group IIIA.

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: This invention comprises a catalytic component for polymerizing olefins comprising a solid support containing magnesium-halogen bonds, a transition metal halide of a metal selected from Groups IVB and VB of the periodic table, and an electron donor obtained by the steps comprising:(a) reacting an organometallic compound whose metal comprise members of Groups I to III of the periodic table with an alcohol, ROH, where R is an alkyl, cycloalkyl, or arylalkyl moiety having 1 to 16 carbon atoms, a polysiloxane, and a transition metal halide to form a solid;(b) treating the solid with a transition metal halide optionally in the presence of a polysiloxane to form a treated solid; and(c) reacting the treated solid with an electron donor and a transition metal halide to form the component.

Abstract: A first reactant selected from arylsilanol, hydrocarbyl amine, hydrocarbylphosphine oxide, and hydrocarbyloxyphosphite is combined with a second reactant selected from halogenated transition metal compound and an organometal compound to form a product which is catalytically active for olefin polymerization after optionally first having been deposited on a particulate diluent.

Abstract: Catalysts for the polymerization of olefins, comprising the product of the reaction between:(a) an Al-alkyl compound;(b) an electron-donor compound capable of reacting with MgCl.sub.2 but which is not completely complexed with Al-triethyl at the equivalent point of a potentiometric titration under standard conditions and belonging to particular classes of compounds; and(c) a solid comprising a Ti compound having at least a Ti-halogen bond and an electron-donor compound belonging to particular classes of esters, both supported on a Mg halide in active form.

Abstract: Catalysts for the polymerization of alpha-olefins, comprising the product of the reaction between:(a) a metalorganic Al compound;(b) an electron-donor compound reactive towards MgCl.sub.2 but which results not to be completely complexed with Al-triethyl at the equivalent point of the potentiometric titration under standard conditions;(c) a solid comprising a halogenated Ti compound supported on an anhydrous Mg halide and at least one of the following activators:(1) an Al, Fe, Mn, Sb or Zn compound containing at least one metal-halogen bond;(2) a complex between an electron-donor compound and a Lewis acid chosen among the halides of the metals of Groups II-VIII of the Periodic System other than Ti;(3) a compound or composition, inert towards the Mg halide, having a dielectric constant at 20.degree. C. higher than 2;compounds (1), (2) and (3) being extractable from the solid for at least 30% by mols by treatment with toluene at 80.degree. C.

Abstract: An unmilled catalytic component for polymerizing olefins with high activity to yield polymers with high stereoregularity and a narrow particle size distribution with a low weight percentage of small particles comprises a solid, unmilled support containing magnesium-halogen bonds, a transition metal halide of a metal selected from Groups IVB and VB of the periodic table, and electron donors.This catalytic component is obtained by steps comprising:(a) contacting a Mg(OR).sub.2 and/or Mn(OR).sub.2 compound with a Ti(OR).sub.4 compound to comprise a liquid, where R is a hydrocarbyl or halogenated hydrocarbyl moiety containing 1 to 20 carbon atoms or a halogen,(b) reacting the liquid with a fluid comprising a halogenating agent and treatment with an electron donor to form a treated solid, and(c) post-treating the solid with a transition metal halide.

Abstract: A catalyst useful for polymerizing olefins which comprises a solid catalyst component [A] and an organometallic component [B], the solid catalyst component [A] being obtained by reacting (1) an organometallic compound with (2) a transition metal compound selected from the group consisting of a titanium compound, a vanadium compound, a mixture of a titanium compound and a vanadium compound and a mixture of a titanium compound and a zirconium compound, in the presence of (3) a solid reaction product of (a) an organomagnesium compound of the formulaM.sub..alpha. MgR.sub.p X.sub.q.D.sub.rwherein.alpha., p, q and r each independently is 0 or a number greater than 0,p+q=m.alpha.+20.ltoreq.q/(.alpha.

Abstract: A catalyst component is a transition metal composition which is obtained by reacting together an inert particulate material, an organic magnesium compound, a halogen-containing compound such as carbon tetrachloride or silicon tetrachloride and a specified transition metal compound. The catalyst component obtained can be used, together with an organic metal compound, to give an olefin polymerization catalyst. The catalyst can be used to effect the polymerization of olefin monomers, for example, the copolymerization of ethylene with an alpha-olefin monomer such as butene-1 in a fluidized bed reactor.

Abstract: A suspension which comprises an inert liquid medium, a solid material, and a transition metal compound is dried using a spray-drying technique. The spray-drying is effected under conditions of temperature and pressure which are such as to cause evaporation of the liquid medium. The solid material is preferably in a finely-divided form. The solid material may consist essentially of a transition metal compound or may be a transition metal compound which is supported on a suitable solid inert matrix material. Alternatively, a suspension of a solid support material in a solution of a transition metal compound may be used. The dried solid is obtained as an agglomerate. The agglomerated solid can be mixed with an organic compound of a non-transition metal to give an olefin polymerization catalyst system.

Abstract: A novel catalytic system for polymerizing olefins comprises:(a) a cocatalytic component containing an organometallic compound of Groups I-III of the periodic table, and(b) a catalytic component containing titanium obtained by:(i) copulverizing a substantially anhydrous magnesium compound containing halogen or manganese compound containing halogen with: a phenol, an organic polymer containing silicon, a titanium halide, and an electron-donor compound to produce a copulverized product, and(ii) reacting the copulverized product with a liquid titanium compound containing halogen.The invention also encompasses the novel catalytic component, processes for preparing the catalytic component containing titanium, and the use of the novel catalytic system for polyermizing olefins.

Abstract: A catalytic component for polymerization of an .alpha.-olefin is prepared through a process wherein a solid product obtained by allowing an organo-magnesium compound or a mixture of an organo-magnesium compound and an organo-aluminum compound or their reaction product to react, in the presence of an electron donor and an .alpha.-olefin, with a mixture of a halogenating agent other than a halogenated titanium compound and a titanium compound or their reaction product is treated with an alcohol and/or a phenol. The treated product may be further treated with a halogenated titanium compound. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence of a catalyst composition consisting of the catalytic component and an organo-aluminum compound or with a concomitant electron donor used together with the catalyst composition.

Abstract: An .alpha.-olefin polymerizing catalytic component is obtained by treating, with alcohol and/or phenol, a solid product obtained by allowing an organo-magnesium compound expressed by a generic formula of R'MgX' (wherein R' represents a hydro-carbon group having 1 to 20 carbon atoms and X' a halogen atom selected from the group consisting of chlorine, bromine and iodine or a hydrocarbon group having 1 to 20 carbon atoms) to react with a halogenating agent in the presence of an electron donor; by treating the treated matter with a halogen-containing titanium compound, either after heating under reduced pressure or without such heating; and by treating the product further with a mixture or a complex consisting of an organo-aluminum compound, an organic acid ester and a poly-siloxane. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence of a catalyst system comprising the catalytic component and an organo-aluminum compound.

Abstract: A process for the preparation of the former catalyst component of a catalyst for the polymerization of olefins composed of a titanium-based catalyst component and an organo aluminium compound is disclosed.The former catalyst component can readily be produced by contacting (a) a fatty acid salt of magnesium, (b) an electron donor compound and (c) a titanium halide.In the polymerization of olefins by use of the former catalyst component, both the amount of catalyst residues in the produced polymer and halogen content therein are greatly reduced with high polymerization activity per unit weight of the former catalyst component and with high yield of stereoregular polymer.

Abstract: A Ziegler type supported catalytic component for polymerization of an .alpha.-olefin is prepared by allowing an organo-magnesium compound expressed by a generic formula of R'MgX' (wherein R' represents a hydrocarbon group having 1 to 20 carbon atoms and X' either a halogen atom chosen out of chlorine, bromine and iodine or a hydrocarbon group having 1 to 20 carbon atoms) to react wtih carbon tetrahalide in the presence of an electron donor compound to obtain a solid product through a solid-liquid separation process; by heat treating the separated solid product with a carbon halide; by treating the heat treated solid product with phenols at 90.degree. to 180.degree. C.; and by treating this phenol treated product further with a halogenated titanium compound. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence or a catalyst composition consisting of the above catalytic component and an organo-aluminum compound. With this catalytic component, stereospecific polymerization of an .alpha.

Abstract: A catalytic component for polymerization of an .alpha.-olefin is prepared by allowing an organo-magnesium compound expressed by the generic formula of RMgX (wherein R represents a hydrocarbon group having 1 to 20 carbon atoms and X a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms) to react with carbon tetrahalide in the presence of an electron donor compound to obtain a solid product; by treating the solid product with phenols at 90.degree. to 180.degree. C.; and by further treating the phenol treated solid with a halogenated titanium compound. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence of a catalyst composition consisting of the catalytic component thus prepared and an organo-aluminum compound.

Abstract: New components of catalysts for the polymerization of alpha-olefins, e.g., olefins containing three or more carbon atoms, and mixtures thereof with ethylene, are disclosed, said catalysts comprising a Mg dihalide and, chemically fixed thereto, a Ti compound and an electron-donor compound.

Abstract: A process for the production of ethylenic polymers, characterized in that ethylene is homopolymerized or ethylene with .alpha.-olefin is copolymerized by the use of a catalyst system comprising:(A) a solid catalyst component prepared by treating (1) a solid ingredient containing at least a magnesium atom, a halogen atom and a transition metal element with (2) at least a cyclic organic compound; and(B) an organoaluminum compound; or(A) the solid catalyst component;(B) the organoaluminum compound; and(C) an electron donor compound; and the catalyst systewm as obtained in the above-described manner.Ethylenic polymers having a narrow distribution of molecular weight, having suitability for use in injection molding and having excellent powder characteristics can be produced, and by using this polymer, film having excellent optical characteristics can be produced.