Abstract: A shaped article made of a polymeric composition comprising as the essential component a saturated linear polyester or polyamide comprising a structural unit of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are same or different and each represents a monovalent organic group such as a monovalent aliphatic, alicyclic or aromatic group having one or more carbon atoms (preferably 1 to 20 carbon atoms) and m and n are each an integer of 0 to 3 in an amount of 0.01 to 50 moles per 100 moles of the total ester or amide linkages in the molecule of the polyester or polyamide is irradiated with actinic rays so that chain-linking takes place between or among the molecules of the polyester or polyamide, whereby the physical and chemical properties of the shaped article are favorably enhanced.

Abstract: A polyethylene composition comprising three specific types of polyethylenes; polyethylene (A), polyethylene (B) and polyethylene (C) respectively. The polyethylene composition has a melt index not less than 0.001 g/10 min. and not more than 10 g/cm and exhibits excellent processability under variant molding techniques. Molded objects exhibit excellent physical properties such as impact strength environmental stress cracking resistance and uniform thickness distribution. Polyethylene (A) has a molecular weight of from 5,000 to 90,000 and polyethylene (C) has a molecular weight of from 100,000 to 1,500,000 and the ratio of the molecular weight of polyethylene (C)/the molecular weight of polyethylene (A) is from 4 to 200.

Abstract: A process for polymerizing an .alpha.-olefin which comprises contacting the .alpha.-olefin at a temperature of about 10.degree. C. to about 100.degree. C. with a catalyst comprising a slurry component (A) and an organometallic component (B), the component (A) being obtained, without intermediate or final solids separation, by reacting (1) a slurry reaction mixture produced by reacting one mol of (i) a hydrocarbon-soluble organomagnesium component of the general formulaM.alpha.Mg.beta.R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.sor of the reaction product of M.alpha.Mg.beta.R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.s with at least one electron donor selected from the group consisting of ethers, thioethers, ketones, aldehydes, carboxylic acids or derivatives thereof, alcohols, thioalcohols and amines, with 0.1 to 10 mols of (ii) a chlorosilane compound of the formulaH.sub.a SiCl.sub.b R.sub.4-(a+b).sup.10at a temperature of about 20.degree. C. to about 150.degree. C.

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 suitable for use in the polymerization of olefins is disclosed. This catalyst contains:[A] a solid catalyst component obtained by calcining (a) a zirconium compound represented by the general formula:Zr(OR.sup.0).sub.n A.sub.4-nwherein R.sup.0 is a hydrocarbon group having 1 to 20 carbon atoms; A is a halogen atom, a carboalkoxy group, a carboxyl group, an acylalkenate, or a hydrocarbon group having 1 through 20 carbon atoms; and n is a number of 0 through 4; and (b) a chromium compound, supported on an inorganic oxide carrier;[B] an organometallic compound component.

Abstract: A catalyst suitable for use in the polymerization of olefins is disclosed. This catalyst contains:[A] a solid catalyst component obtained by calcining a reaction product of (a) at least one compound selected from an amine compound, a phosphoric acid amide, a hydrocarbyloxy compound of titanium, vanadium, hafnium or zirconium, and a germanium compound having the general formula:R.sup.1 R.sup.2 R.sup.3 R.sup.4 Gewherein (i) R.sup.1, R.sup.2 and R.sup.3 are each independently a hydrocarbon group having 1 through 10 carbon atoms, and R.sup.4 is a hydrogen atom, a halogen atom, a --OH group, or a --OGeR.sup.1 R.sup.2 R.sup.3 group, or (ii) R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently --OR.sup.5 wherein R.sup.5 is a hydrocarbon group having 1 through 10 carbon atoms, or a halogen atom, and a tin compound having the general formula:R.sup.1 R.sup.2 R.sup.3 R.sup.6 Snwherein R.sup.1, R.sup.2 and R.sup.3 are the same as defined above and R.sup.

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) a solid inorganic oxide, (2) a hydrocarbon-soluble organomagnesium component of the general formulaM.sub..alpha. M.sub.g.beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,.beta.is a number greater than 0,p+q+r+s=m.alpha.+2.beta.,m is the valence of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X and Y each independently is an OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 or SR.sup.9 group wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each independently is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms and R.sup.

Abstract: An olefin polymerization catalyst comprising a solid catalyst (I) and an organometallic compound (II), wherein said solid catalyst (I) is obtainable by reacting an organomagnesium compound (a) soluble in hydrocarbon solvent and represented by the following formula:MgR.sup.1.sub.p R.sup.2.sub.q X.sub.r(in the formula, R.sup.1 and R.sup.2, identical or different, represent a secondary or tertiary alkyl group having 4-6 carbon atoms, X represents a negative group containing O, N or S atom, p and q represent a number of 0-2, r represents a number of 0-1, and p, q and r satisfy: p+q+r=2) with a compound of titanium or vanadium having at least one halogen atom (b), has a high activity, is uniform, has a high density, is suitable for continuous polymerization of olefins, and enables to omit the catalyst removal step after the polymerization reaction.

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: An olefin polymerization catalyst which shows an extremely high activity even at low temperatures and is suited for the production of blow molding polymers, said catalyst comprising a solid component constituted by a chromium compound supported by an inorganic oxide carrier, and an organomagnesium complex compound soluble in the inert hydrocarbons and represented by the general formula: M.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 R.sub.r.sup.3 X.sub.s Y.sub.t (wherein .alpha.>0, .beta.>0, p.gtoreq.0, q.gtoreq.0, r.gtoreq.0, s>0, t.gtoreq.0, 0<(s+t)/(.alpha.+.beta.).ltoreq.1.5 and p+q+r+s+t=m.alpha.+2.beta.; M is an atom selected from the group consisting of aluminum, zinc, boron, beryllium and lithium; m is the valence of M; R.sup.1, R.sup.2 and R.sup.3 may be same or different and represent respectively a hydrocarbon radical having 1 to 20 carbon atoms; X is OSiR.sup.5 R.sup.6 R.sup.7 ; and Y is a radical selected from the group consisting of OR.sup.4, OSiR.sup.5 R.sup.6 R.sup.7, NR.

Abstract: Novel hydrocarbon-soluble isopropyl group-containing diorganomagnesium compounds and hydrocarbon solutions thereof are disclosed. The compound of the present invention has a high weight percent of Mg per one mol thereof, and the hydrocarbon solution of the present invention has a very low viscosity as compared with the conventional solutions. The hydrocarbon solution of the present invention can be prepared according any of various processes. If the reaction is carried out in an ether medium, the ether is substituted with a hydrocarbon solvent by removing the ether from the reaction mixture by distillation in the presence of the hydrocarbon solvent.

Abstract: A polyethylene composition comprising a mixture of three kinds of polyethylenes (A), (B) and (C) characterized in that:(i) the viscosity average molecular weight of (A) is 1,000-100,000, the viscosity average molecular weight of (B) is 100,000-1,000,000, the viscosity average molecular weight of (C) is 400,000-6,000,000, the molecular weight ratio of (B) to (A), i.e. B/A, is 2-200 and the molecular weight ratio of (C) to (B), i.e. C/B, is 1.5 or more.(ii) the mixing ratio of (A) to (B) is 30/70 to 70/30 and the mixing ratio of (C) is 1-10% by weight based on the total composition, and(iii) the melt index of the composition is 0.001-1, and a process for producing said composition. This polyethylene composition is excellent in physical properties in that it has an appropriate die swell, a high melt tension and an excellent moldability and exhibits a high stiffness and a high ESCR.

Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to about 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula,M.sub..alpha. MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2 D.sub.twherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,t is a number greater than 0,p+q+r+s=m.alpha.+2,O.ltoreq.(r+s)/(.alpha.+1)<2,m is the valance of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X.sup.1 and X.sup.

Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to about 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2wherein.alpha., p, q, r and s each independently is 0 or a number greater than 0,.beta. is 1 or a number greater than 1,p+q+r+s=m.alpha.+2.beta.,0.ltoreq.(r+s)/(.alpha.+.beta.)<2,m is the valence of M,M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 and R.sup.2 each independently is a hydrocarbon group having 1 to 20 carbon atoms,X.sup.1 and X.sup.

Abstract: A catalyst for the solution polymerization of .alpha.-olefins is prepared by admixing component (A) with an organometal component (B), component (A) being prepared by reacting a specific hydrocarbon-soluble organomagnesium compound with an aluminum compound and contacting the obtained product with a titanium and/or vanadium compound.

Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula,M.sub..alpha. MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2 D.sub.t.alpha., p, q, r, s and t each independently is O or a number greater than 0,p+q+r+s=m.alpha.+2O.ltoreq.(r+s)/(.alpha.+1)<2,m is the valence of M, M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 is a secondary or tertiary alkyl group having 3 to 20 carbon atoms,X.sup.1 and X.sup.2 each independently is a hydrogen atom or an organic electronegative group containing O, N or S,D is an electron donor,with a compound (ii) of the formula,R.sub.a.sup.3 C Y.sub.4-awhereinR.sup.

Abstract: A catalyst for preparing an .alpha.-olefin polymer having a broad molecular weight distribution and excellent physical properties, which comprises a solid catalyst component (A) and an organometal compound (B), the solid catalyst component (A) being obtained by reduction with an organomagnesium solution of the thermal decomposition solid product of special titanium compounds.

Abstract: An intimately melted and homogenized polyethylene composition having excellent physical properties and moldability and comprising a high-medium density polyethylene having a high molecular weight (A), a high-medium density polyethylene having a low molecular weight (B) and a low density polyethylene (C) characterized in that:(i) the average molecular weight of (A) is 100,000-1,000,000, the average molecular weight of (B) is 1,000-100,000, the molecular weight ratio of (A) to (B) is 5-200, and (C) has an intrinsic viscosity [.eta.] of 0.70 dl/g or more in decalin at 135.degree. C. and an expansion factor of 3.3 or more, and(ii) the mixing ratio (A)/(B) is 30/70 to 80/20 and the mixing ratio of (C) in the composition is within the range from 1% by weight to less than 15% by weight.

Abstract: Novel highly active catalysts useful for highly stereospecific polymerization of olefin which enables to produce polymer of good grain size having a high stereoregularity can be obtained by a combination of [A] a solid catalyst component obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound containing Si--H (ii) to obtain a solid (1) and reacting said solid (1) with a titanium compound containing at least one halogen atom (2) and a carboxylic acid or a derivative thereof (3) and [B] a component consisting of an organometallic compound and a carboxylic acid or a derivative thereof.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.> 0; p, q, r and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta. wherein m is the valency of M; M is a metal element of the 1st to the 3rd group of the Periodical Table; R.sup.1 and R.sup.

Abstract: A catalyst useful for polymerizing olefins, capable of providing an extremely high catalyst efficiency, excellent grain size and high bulk density of polymer; production of polymer having various molecular weight distributions from a broader range to a narrower range and controlling of die swell of formed polymer, by using a mechanical grinding and contacting means. Said catalyst shows a high activity and higher stereoregularity in the polymerization of polypropylene when it is used together with an electron donor compound.Said catalyst comprises a solid catalyst component (A) and an organometallic compound (B), said catalyst component (A) is obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound (ii) and reacting and/or grinding-contacting the solid obtained by the reaction of (i) and (ii) with a titanium and/or vanadium compound containing at least one halogen atom.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.