Abstract: The present invention provides metallocene compounds which exhibit high polymerization activity for production of highly stereoregular polymers, as well as a production process for olefin polymers which employs olefin polymerization catalysts containing the compounds, and olefin polymers obtained by the production process.

Abstract: Metallocene compounds represented by the following general formula (1): YqKLMX2??(1) wherein M, Y, q, L and X are each as defined in the Specification.

Abstract: The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity.

Abstract: Metallocene compounds represented by the following general formula (1):

Abstract: The present invention provides metallocene compounds which exhibit high polymerization activity for production of highly stereoregular polymers, as well as a production process for olefin polymers which employs olefin polymerization catalysts containing the compounds, and olefin polymers obtained by the production process.

Abstract: A supported metallocene catalyst comprising solid fine particles which comprise a reaction product of a metallocene compound and aluminoxane supported on the finely particulate inorganic support, said solid fine particles being produced by carrying out in order of the following steps: (a) reacting a metallocene compound with an aluminoxane in an aromatic hydrocarbon solvent to form a reaction product, (b) contacting the reaction product with a finely particulate inorganic support at a temperature of 85 to 150° C. in the presence of any aromatic hydrocarbon solvent to form a solid product, and (c) washing the solid product with an aliphatic hydrocarbon solvent at a temperature of −50° C. to +30° C.

Abstract: Disclosed is a process for producing olefin polymers or copolymers which can freely regulates the molecular weight of the polymers or copolymers as well as novel olefin polymers or copolymers excellent in rigidity, heat-resisting property and transparency, moldings and compositions thereof which find a wide variety of applications in versatile industrial parts including containers, films, sheets, filaments or fibers, featured by (1) a process for producing olefin polymers or copolymers by the aid of a catalyst comprised predominantly of the compounds: (A) a transition metal compound of the formula: Q(C5H4−mR1m)(C5H4−nR2n)MXY, (B) an aluminoxane, (C) a fine particulate carrier, and (D) an organoaluminum compound; (2) olefin polymers or copolymers characterized by (a) a specific ratio of isotactic pentad, (b) 2,1- and 1.

Abstract: A process for producing a propylene//propylene/olefin block copolymer, characterized by using as a supported metallocene catalyst a solid product obtained by conducting, in this order, the step (a) of reacting an organic transition metal compound having two crosslinked conjugated &pgr;-electron ligands with an aluminoxane in an inert solvent, the step (b) of contacting the reaction product obtained in the step (a) with a finely particulate inorganic support in the presence of an inert solvent at 85 to 150° C., and the step (c) of washing the slurry containing a solid product yielded in the step (b) with an aliphatic hydrocarbon at least twice at −50 to 50° C.; and a propylene//propylene/olefin block copolymer produced by said process.

Abstract: The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity.

Abstract: A solid catalyst component for olefin polymerization superior in shatter resistance and narrowness of particle size distribution, is provided, which component is prepared by spraying a mixture of Mg compound with an alcohol in a molten state, in a column; cooling the inside of the column; to obtain a component (B); partly removing the alcohol from (B), to obtain a solid component (C); contacting a halogen-containing Ti compound and an electron donor with (C); to obtain (D); contacting (D) with a halogen-containing Ti compound; in the above process, specifying the composition formulas of (A), (B) and (C); specifying the X-ray diffraction spector of (C) in comparison of that of (B); and contacting (C) with a halogen-containing Ti compound and an electron donor using an aliphatic hydrocarbon of a specified b.p., in a specified temperature.

Abstract: A solid catalyst component for olefin polymerization superior in shatter resistance and narrowness of particle size distribution, is provided,which component is prepared byspraying a mixture of Mg compound with an alcohol in a molten state, in a column; cooling the inside of the column; to obtain a component (B); partly removing the alcohol from (B), to obtain a solid component (C); contacting a halogen-containing Ti compound and an electron donor with (C); to obtain (D); contacting (D) with a halogen-containing Ti compound;in the above process,specifying the composition formulas of (A), (B) and (C); specifying the X-ray diffraction spector of (C) in comparison of that of (B); and contacting (C) with a halogen-containing Ti compound and an electron donor using an aliphatic hydrocarbon of a specified b.p., in a specified temperature.

Abstract: A catalyst component for olefin polymerization composed of a solid component (IV) and capable of affording a supported type catalyst composed of large particles and having a sharp particle size distribution is provided,which solid component (IV) is obtained bystep A of reacting an organic Mg compound of a specified formula with a 1-20C saturated or unsaturated mono- or polyhydric alcohol C in the presence of CO.sub.

Abstract: A catalyst for use in polymerization of olefins which comprises a carrier mainly composed of a magnesium compound precipitated from a solution and a catalytic component supported on the carrier and selected from titanium halides, vanadyl halides and vanadium halides is described. The catalyst is obtained by a process which comprises: (A) mixing (a) at least one magnesium compound with (c) a saturated or unsaturated monohydric or polyhydric alcohol for reaction in dissolved state in the presence of (b) carbon dioxide in an inert hydrocarbon solvent to obtain component (A); (B) subjecting the component (A) to mixing and reaction with (d) a titanium and/or a vanadyl halide and/or a vanadium halide of the general formula, VX.sub.r (OR.sup.8).sub.4-r, and also with (e) at least one boron compound, Si compound and/or Siloxane compound thereby obtaining solid product (I); (C) reacting the solid product (I) with (f) a cyclic ether with or without R.sup.

Abstract: A solid catalyst component which can produce .alpha.-olefin polymers having a high stereoregularity and a good powder fluidity, stably and with a good efficiency in gas phase polymerization, particularly in gas phase copolymerization, a catalyst for .alpha.-olefin polymerization using the above solid catalyst component and a process for producing the above catalyst component, are provided,which solid catalyst component is charcterized in that it contains titanium as an active ingredient and is in the form of hollow fine particles, andwhich process is characterized by adding a reaction product (I) of an organoaluminum compound (A) with an electron dnor (B.sub.1) to TiCl.sub.4 and reacting these under agitation in a baffle ratio of 0.35 or less with a power required for agitation of 2.50 KW/m.sup.3 or less at a temperature of 0.degree. to 70.degree. C. for a period of 1 to 10 hours and further reacting an electron donor (B.sub.

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: 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 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 process for producing terpolymers of propylene (as a main monomer), ethylene and another .alpha.-olefin having superior and well-balanced physical properties, almost without forming soluble polymer is provided.This process is characterized by preliminarily activating a catalyst consisting of a titanium trichloride composition and a specified organoaluminum halide, with a small amount of an .alpha.-olefin of 2 to 12 carbon atoms, a trialkylaluminum and an aromatic ester, and copolymerizing specified amounts of propylene, ethylene and an .alpha.-olefin of 4 to 12 carbon atoms in the presence of the preliminarily activated catalyst obtained above.

Abstract: A process for producing highly crystalline .alpha.-olefin polymers of good particle form with high yield is provided, which comprises polymerizing .alpha.-olefin in the presence of a preactivated catalyst obtained by reacting a reaction product (I) of organoaluminum compound (A.sub.1) with electron donor (B.sub.1), with TiCl.sub.4 to obtain a solid product (II); further reacting (II) with electron donor (B.sub.2) and electron acceptor to obtain a solid product (III); during or/and after the reaction step for obtaining (II) or/and during or/and after the reaction step for obtaining (III), subjecting (II) or (III), to polymerization treatment with .alpha.-olefin; and combining the resulting final solid product with organo-aluminum compound (A.sub.2) and a reaction product (G) of organo-aluminum compound (A.sub.3) with electron donor (B.sub.3) to obtain a preactivated catalyst; and preferably, in this combination, further subjecting a part or the total of the catalyst to polymerization treatment with .alpha.