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: Disclosed is a soft and flexible thermoplastic resinous composition having high impact and tear resistances, a good processability and a good thermal adhesion to a wide variety of plastic and other materials. The resinous composition consists essentially of 5 to 70 wt. % of a thermoplastic polyurethane elastomer and 30 to 95 wt. % of a modified polyolefin or an olefin copolymer, having functional groups of at least one type selected from carboxyl, carboxylate salt, carboxylic anhydride, amide, hydroxyl and epoxy groups.

Abstract: Disclosed is a soft and flexible thermoplastic resinous composition having high impact and tear resistances, a good processability and a good thermal adhesion to a wide variety of plastic and other materials. The resinous composition consists essentially of 5 to 70 wt. % of a thermoplastic polyurethane elastomer and 30 to 95 wt. % of a modified polyolefin or an olefin copolymer, having functional groups of at least one type selected from carboxyl, carboxylate salt, carboxylic anhydride, amide, hydroxyl and epoxy groups.

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 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 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 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: An ethylene polymer film exhibiting improved impact strength and tear strength is provided. This film is made of an inorganic filler-incorporated ethylene polymer composition which is comprised of:(a) 35-90 wt.%, based on the ethylene polymer composition, of an ethylene polymer having a melt index of 0.005-0.2 and a specific gravity of 0.94- 0.98 as measured at a temperature of 23.degree. C.,(b) 10-65 wt.%, based on the ethylene polymer composition, of a finely divided inorganic filler particle having an average particle size of 0.01-10 microns,(c) 0.1-10 wt.parts, based on 100 wt.parts of the ingredient (b), of a higher fatty acid,(d) 0.5-15 wt.parts, based on 100 wt.parts of the ingredient (b), of a metal salt of a higher fatty acid, and(e) 0.05-5 wt.parts, based on 100 wt.parts of the ingredient (b), of a stabilizer composition predominantly comprised of a phenolic stabilizer.The ethylene polymer film is produced by extruding the ethylene polymer composition at 150.degree.-250.degree. C.

Abstract: A thermoplastic composite composition comprisingI. about 95 to about 30 percent by weight of a thermoplastic material andIi. about 5 to about 70 percent by weight of a polyolefin composition comprisingA. about 15 to about 60 percent by weight of a polyolefin andB. about 85 to about 40 percent by weight of at least one reactive inorganic filler,Said reactive inorganic filler having been prepared by effecting reaction betweenA. an inorganic material substantially comprising at least one compound selected from the group consisting of metal carbonates, metal hydroxides and metal oxides, said metal being selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, zinc, cadmium and aluminum, said compound having a number average particle diameter of from about 0.01 .mu.. to about 50 .mu.. and a maximum particle diameter of about 100 .mu.., andB.