Abstract: Propylene is polymerized in the presence of a catalytic system of the type which comprises a solid titanium trichloride-based complex serving as a catalyst, said complex having an atomic ratio of aluminum to titanium in the range of below 0.15:1 and containing a complexing agent, and an organic aluminum compound of the general formula, AlR.sup.1.sub.n Cl.sub.3-n wherein R.sup.1 represents an n-propyl group or an n-hexyl group and n is a value of 1.95-2.10. The catalytic system may further comprise an electron-donor compound as a third catalytic component.

Abstract: A process for the production of polyethylene characterized in that the polymerization is carried out in the presence of an alcohol and in the presence of a polymerization catalyst prepared from (A) a solid catalyst component containing at least titanium, magnesium, and chlorine; (B) trialkylaluminum of the formula R.sup.1.sub.3 Al wherein R.sup.1 is an alkyl or cycloalkyl group; and (C) a chlorine-containing aluminum compound of the formula R.sup.2.sub.n AlCl.sub.3-n wherein R.sup.2 is an alkyl or cycloalkyl group, and n is a real number of from 1 to 2.

Abstract: Polymerization of alpha-monoolefins employing a catalyst comprising (A) a milled admixture of a titanium halide, anhydrous magnesium or manganous chloride, optionally a Lewis base, and (B) a dihydrocarbylaluminum halide, a dihydrocarbylaluminum hydride, and an ether-alcohol.

Abstract: An alpha olefin is polymerized to obtain highly crystalline polymers by subjecting the alpha olefin to polymerization conditions using as a catalyst therefor the reaction product of (A) an aluminum hydrocarbyl treated with an electron donor compound and (B) a support containing chlorine, bromine and magnesium, wherein the molar ratio of bromine to chlorine ranges between about 1:99 to about 50:50, preferably between about 2.5:97.5 to about 20:80, and most preferably between about 2.5:97.5 to about 15:85, obtained by reacting an organo magnesium compound with a mixture of chlorinated and brominated aluminum compounds, the support having been additionally treated with an electron donor compound and with titanium tetrachloride. The molar ratio of magnesium to combined chlorine and bromine in the support is not critical but generally ranges between about 1:1.6 and about 1:2.0, preferably between about 1:1.8 and about 1:2.0.

Abstract: A process for producing .alpha.-olefin polymers is provided which comprises:reacting an organoaluminum compound (A.sub.1) with an electron donor (B.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 (B.sub.2) and an electron acceptor to obtain a solid product (III);combining (III) with an organoaluminum compound (A.sub.2) and a reaction product (G) of an organoaluminum (A.sub.3) with an electron donor (B.sub.3) ((III), (A.sub.2) and (G) 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 (A.sub.2) to obtain a preliminarily activated catalyst;andpolymerizing an .alpha.-olefin in the presence of the catalyst.

Abstract: A transition metal compound containing at least one .pi.-bonded arene is contacted with an inorganic oxide, hydroxide, oxyhalide, hydroxyhalide or halide. The transition metal compound can be a compound such as titanium(O)ditoluene or TiCl.sub.2.2AlCl.sub.3 durene. The inorganic compound is preferably of high surface area and this may be inherent in the compound or can be achieved by a grinding procedure. The inorganic compound can be treated with a halogen containing compound either before, during or after the contacting with the transition metal compound. The product of the contacting is useful either as catalyst for the polymerization of unsaturated hydrocarbon monomers or as a component of such a catalyst. When used as a component of an olefine polymerization catalyst, the transition metal product can be mixed with an organo-aluminum compound and a Lewis Base compound such as an ester.

Abstract: A process for preparing an olefin polymer or copolymer by polymerizing or copolymerizing an olefin containing at least 3 carbon atoms which may contain at most 10 mole % of ethylene and/or a diene, in the presence of a catalyst composed of (A) a solid titanium catalyst component prepared by(1) reacting a mechanically pulverized product of an organic acid ester and a halogen-containing magnesium compound, with an active hydrogen-containing organic compound in the absence of mechanical pulverization,(2) reacting the resulting reaction product with an organometallic compound of a metal of Groups I to III of the periodic table in the absence of mechanical pulverization, and(3) washing the resulting solid reaction product with an inert organic solvent, reacting the washed solid reaction product with a titanium compound in the absence of mechanical pulverization, and separating the solid from the reaction system,and (B) an organometallic compound of a metal of Groups I to III of the periodic table; and a catalyst u

Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium halide deposited on an anhydrous, essentially magnesium halide support and an activator component composed of a trialkylaluminum and a lower alkyl ester of an aromatic carboxylic acid, the decay in activity of the catalyst is delayed by replacing a portion of the trialkylaluminum in the activator component with a dialkylaluminum hydride.

Abstract: A method for preparing copolymers of a bicycloheptene and 1,3-butadiene is described. The method comprises polymerizing said monomers in a hydrocarbon solvent in the presence of a catalyst mixture comprising:(a) at least one organoaluminum compound of the formula R.sub.3 Al or R.sub.2 AlX wherein R is an alkyl radical containing from one to about 12 carbon atoms, and X is a halogen, and(b) at least one molybdenum salt.These copolymers can be oil extended and vulcanized to high strength rubbers.

Abstract: A catalyst comprising(a) a reaction mixture formed by reacting M(RCO.sub.2).sub.3 with AlR.sub.3.sup.1,(b) AlR.sub.3.sup.2 and/or HAlR.sub.2.sup.2 and(c) a Lewis acidwherein M denotes a trivalent rare earth element with an atomic number of 57 to 71, R denotes a saturated or unsaturated, straight chain or branched chain alkyl group having 1 to 20 C-atoms which may be substituted one or more times with cycloalkyl having 5 to 7-atoms and/or phenyl, the carboxyl group being attached to a primary, secondary or tertiary C-atom; a cycloalkyl group having 5 to 7 ring carbon atoms, which may be substituted one or more times with alkyl groups having from 1 to 5 C-atoms; or an aromatic group having from 6 to 10 ring carbon atoms, which may be substituted one or more times with alkyl groups having 1 to 5 C-atoms, and R.sup.1 and R.sup.2 are identical or different, straight chain or branched chain alkyl groups having from 1 to 10 C-atoms. Said catalyst may be used for polymerizing diene monomers in solution.

Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium trichloride and an activator component composed of a trialkylaluminum, the stereospecificity of the catalyst is increased by replacing a portion of the trialkylaluminum in the activator component with a dialkylaluminum dialkylphosphate.

Abstract: Propylene is polymerized in the presence of a catalytic system of the type which comprises a solid titanium trichloride-based complex serving as a catalyst, said complex having an atomic ratio of aluminum to titanium in the range of below 0.15:1 and containing a complexing agent, and an organic aluminium compound of the general formula, AlR.sub.n.sup.1 Cl.sub.3-n wherein R.sup.1 represents an n-propyl group or an n-hexyl group and n is a value of 1.95-2.10. The catalytic system may further comprise an electron-donor compound as a third catalytic component.

Abstract: Titanium trichloride for use as a component of a Ziegler polymerization catalyst is modified in order to enhance the activity and/or stereospecificity of the catalyst in the polymerization of olefins, especially propylene, by heating the titanium trichloride with phosphorus oxytrichloride in an aromatic hydrocarbon diluent for several hours in the absence of the organo aluminium component of the catalyst. Ball milling, or shearing, during the modification reaction is not required. The use of aromatic hydrocarbon gives unexpected improvement compared with any other hydrocarbon diluent and the modification reaction gives improved results compared with addition of the titanium trichloride, phosphorus oxytrichloride and the organo aluminium component to the reactor at the beginning of a batch polymerization.

Abstract: A titanium trihalide component of an olefine polymerization catalyst is prepared by reacting together a titanium tetrahalide and an organo-aluminium compound, and treating the solid reaction product with a hydrocarbon solution of an alkyl aluminium dihalide. It is preferred that the solid reaction product is treated with a complexing agent, particularly an ether such as di-isoamyl ether before contacting with the alkyl aluminium dihalide. The titanium trihalide can then be used together with an organo-metallic compound to polymerize an olefine monomer, particularly propylene. The catalyst system may include further components in addition to the titanium trihalide and organo-metallic compound.

Abstract: A catalyst comprising(a) a reaction mixture formed by reacting M(RCO.sub.2).sub.3 with AlR.sub.3'.sup.1(b) AlR.sub.3.sup.2 and / or HAlR.sub.2.sup.2 and(c) a Lewis acidwherein M denotes a trivalent rare earth element with an atomic number of 57 to 71, R denotes a saturated or unsaturated, straight chain or branched chain aliphatic hydrocarbon group having 1 to 20 C-atoms which may be substituted one or more times with cycloalkyl having 5 to 7-atoms and/or phenyl, the carboxyl group being attached to a primary, secondary or tertiary C-atom; a cycloalkyl group having 5 to 7 ring carbon atoms, which may be substituted one or more times with alkyl groups having from 1 to 5 C-atoms; or an aromatic group having from 6 to 10 ring carbon atoms, which may be substituted one or more times with alkyl groups having 1 to 5 C-atoms, and R.sup.1 and R.sup.2 are identical or different, straight chain or branched chain alkyl groups having from 1 to 10 C-atoms.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting tetravalent or trivalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source of organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.

Abstract: A new improved Ziegler type catalyst system for alpha-olefin type polymerization includes R'.sub.3 Y or R'.sub.2 YX and mixtures thereof, at least one Group IVB -VIII transition metal halide and an alkyl metal compound selected from R'.sub.2 YNR.sub.2 and R'XYNR.sub.2, wherein Y is Al, Ga or In and at least one Lewis base. The improved catalyst system provides increased polymerization activity without significantly affecting the crystallinity of the polymer.

Abstract: A process is described herein for improving the crystalline olefin polymerization yield and soluble polymer production of a high surface area, large porosity, brown catalyst component comprising beta titanium trichloride and some of at least one organic electron pair donor compound, which component is prepared by organoaluminum compound reduction of titanium tetrachloride followed by incorporation of the reduced solid with said donor compound and thereafter treatment with an electron pair acceptor compound. The improved process employs in the reduction a dialkylaluminum compound and a second material, which second material is subsequently substantially extracted prior to use of said component for polymerization.

Abstract: A catalyst for the polymerization of 1-olefins is prepared by reacting a chromate ester fixed on a carrier selected from the group consisting of oxides of silicon, oxides of aluminum, and mixtures of said oxides, in the absence of an unsaturated polymerizable hydrocarbon, with an aluminum-organic compound and subsequently activating with aluminum-organic compound. No washing liquids that have to be worked up are obtained and the polymers, obtained in a high yield have a broad molecular weight distribution and contain only a small proportion of high molecular constituents. The films made therefrom are practically free from specks.

Abstract: Solid catalytic complexes are useful for stereospecific polymerization of .alpha.-olefins to solid crystalline polymers. The complexes are formed by reducing TiCl.sub.4 with an alkylaluminum, treating thus-obtained reduced solid with a complexing agent and contacting the resultant with TiCl.sub.4. They have a specific surface greater than 75 m.sup.2 /g.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are provided by reacting a trivalent titanium halide complex such as an alcohol complex of titanium trichloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: A catalyst for the (co)polymerization of ethylene, .alpha.-olefines, conjugated and non-conjugated dienes, a method of preparation, and a mode of using same. The catalyst contains from 0.1 to 50 wt.% of a compound of a transition metal of the IV-VIII Groups chemically combined and distributed over the surface and within the volume of a rubber-like polymeric carrier containing from 1 to 50 wt.% of electron-donor and/or electron-acceptor groups and is in the form of a gel which is swellable, but insoluble in the reaction medium.A co-catalyst comprising an organic compound of a metal of Groups I-III is employed chemically combined and/or non-combined with the catalyst.The catalyst is prepared by mixing the metal compound with said carrier swollen or dissolved in a solvent, and by extracting the resulting compound with a solvent.(Co)polymerization is effected in a solvent such as a hydrocarbon or a hologenated hydrocarbon derivative at a temperature not exceeding 200.degree. C.

Abstract: Manufacture of polymers of .alpha.-monoolefins by polymerization with a Ziegler catalyst system comprising (1) a catalyst component containing titanium and/or vanadium and (2) a particular compound of the metals aluminum, magnesium or zinc. The characteristic feature of the process according to the invention is that the catalyst component (1) containing titanium and/or vanadium is the solid-phase product (VII) contained by first (1.1) bringing a finely divided porous inorganic oxidic material (I), which has the formula Al.sub.2 O.sub.3 or SiO.sub.2.aAl.sub.2 O.sub.3, where a is a number from 0 to 2, into contact with an aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III), then (1.2) bringing the solid-phase product (III) obtained in stage (1.1) into contact with a magnesium compound (IV), dissolved in an organic solvent, to form a solid-phase product (V), and finally (1.3) bringing the solid-phase product (V) obtained in stage (1.

Abstract: A catalyst for polymerizing .alpha.-olefins composed of a titanium composition formed by heating a co-comminuted mixture of a magnesium halide and a complex of an aluminum halide and a carboxylic acid ester of the formula R.sup.1 COOR.sup.2, with titanium tetra-chloride; and an organic aluminum compound of the formula AlR.sup.3 mH.sup.3 --m; and optionally added thereto at least one component selected from an alkyl aluminum halide of the formula AlR.sup.4 nX.sub.3 --n; a carboxylic acid ester of the formula R.sup.5 COOR.sup.6 ; and its complex formed with an aluminum halide; is disclosed.

Abstract: A process for producing polyethylene comprising polymerizing ethylene in a medium of a hydrocarbon solvent at a temperature within the range of from 30.degree. to 110.degree. C. under a pressure of from 1 to 60 atm.g. in the presence of a complex organometallic catalyst; said catalyst consisting of an alkylaluminiumhalide of the formula AlR.sub.n (X).sub.3-n (I), wherein R is an alkyl with a number of carbon atoms from 2 to 18; X is Cl, Br, I; n=1 or 2; an oxyvanadiumalkoxide of the formula OV(OR').sub.3 (II), wherein R' is an alkyl with a number of carbon atoms from 2 to 20; and a complex of acrylonitrile with diethylaluminiumchloride of the formula CH.sub.2 =CHCN.Al(C.sub.2 H.sub.5).sub.2 Cl (III); molar ratio between said catalytic components I:II:III being equal to 5-20:1:1-5, respectively. The process makes it possible to obtain polyethylene with a wide (5 to 10) molecular-mass distribution and with an enhanced adhesion to a metal (more than 3000 g/cm).

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are provided by reacting compound of titanium, e.g., a titanate such as tetra(isopropoxy)titanium, an organomagnesium compound or complex such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium 1/6 triethylaluminum and an alkyl aluminum halide. The organomagnesium component is highly concentrated in hydrocarbon diluent at the time it reacts with the metallic halide. The resulting catalysts when used in slurry polymerization processes produce polyolefin powders having higher bulk densities than those produced using conventional high efficiency catalysts.

Abstract: Polymerization of ethylene or .alpha.-olefins is carried out with use of a catalyst comprising a modified titanium component obtained by pulverizing the starting titanium component of Ziegler solid catalysts and subjecting the resultant to a modification treatment through contact with an inert organic solvent or a mixture thereof with a modifier, and an organoaluminum component.The pulverized product of the starting titanium component is pulverized together with an organoaluminum compound and a small amount of ethylene or .alpha.-olefins thereby controlling the particle size distribution.

Abstract: The invention is directed to new catalysts consisting of a chromium compound and an organometal compound of an element of Group II or III of the periodic system on a carrier, the process for preparing the catalyst and its use in polymerizing 1-alkenes containing 2 to 8 carbon atoms, optionally admixed with at most 10 mole% of at least one other 1-alkene of 2 to 8 carbon atoms.

Abstract: Uranium-containing mixed catalysts containing uranium in the formal oxidation state +4 as uranium salts of carboxylic acids, a Lewis acid, and an organometallic aluminum compound are prepared and can be used for stereospecific polymerization of diolefins or mixtures of diolefins and monoolefins.

Abstract: A process for preparing polymers of a monomer mixture of cyclopentadiene and at least one bicycloheptene is described, and the process comprises polymerizing the monomer mixture in the presence of a catalyst mixture comprising(a) at least one organoaluminum halide of the formulaRAlX.sub.2 or R.sub.3 Al.sub.2 X.sub.3 IIwherein R is an alkyl radical containing from 1 to about 12 carbon atoms, and X is a halogen, and(b) at least one tungsten or molybdenum salt, or a mixture of these salts.The polymers obtained in this manner exhibit plastic properties such as high impact strength, and can be oil extended and used as general purpose rubbers.

Abstract: A 1,3-cyclodiene comonomer and a linear conjugated diene comonomer are copolymerized employing a catalyst formed from a mixture comprising a triorganoaluminum compound, a nickel (II) compound and a Friedel-Crafts type cocatalyst. Also, a catalyst and a method for the production thereof which is useful in the copolymerization is provided.

Abstract: A transition metal compound containing at least one .pi.-bonded arene is contacted with an inorganic oxide, hydroxide, oxyhalide, hydroxyhalide or halide. The transition metal compound can be a compound such as titanium(O)ditoluene or TiCl.sub.2.2AlCl.sub.3 durene. The inorganic compound is preferably of high surface area and this may be inherent in the compound or can be achieved by a grinding procedure. The inorganic compound can be treated with a halogen containing compound either before, during or after the contacting with the transition metal compound. The product of the contacting is useful either as catalyst for the polymerization of unsaturated hydrocarbon monomers or as a component of such a catalyst. When used as a component of an olefine polymerization catalyst, the transition metal product can be mixed with an organo-aluminium compound and a Lewis Base compound such as an ester.

Abstract: At least one norbornene-type monomer is copolymerized with about 0% to about 95% by weight of dicyclopentadiene, based upon total polymer weight. The polymerization is primarily by ring opening and is conducted in the presence of (1) a catalyst comprising (a) at least one compound selected from the group consisting of dialkylaluminum iodides, alkylaluminum diiodides and mixtures of trialkylaluminum compounds with iodine, (b) at least one dialkylaluminum chloride or alkylaluminum dichloride and (c) at least one monomer- or solvent-soluble tungsten compound, and (2) at least one nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom. Catalyst components (a) and (b) are charged before catalyst component (c). Use of a catalyst containing components (a), (b) and (c) produces easy-processing and substantially gel-free polymers, whereas a catalyst containing only (a) and (c) or only (b) and (c) produces heavily gelled polymers.

Abstract: A process for polymerizing .alpha.-olefins in the liquid phase is disclosed, wherein the olefins are polymerized in the presence of a catalyst prepared by first reacting as aluminum-halogen compound with an organomagnesium compound and thereafter reacting the resulting reaction mixture with a transition metal compound and then activating the resulting catalyst system with an organo-aluminum compound. The homopolymers and copolymers of .alpha.-olefins produced by this process find use in the normal applications of such polymers.

Abstract: A new improved Ziegler type catalyst system for alpha-olefin type polymerization includes a mixture of at least one Group IVB to VIII transition metal halide, an alkyl metal dihalide, and an N or O containing alkyl metal compound which is an amide or an alkoxide. The improved catalyst system provides polymers having improved isotacticity at increased rates.

Abstract: A new improved Ziegler type catalyst system for alpha-olefin type polymerization includes R'.sub.3 Y or R'.sub.2 YX and mixtures thereof, at least one Group IVB-VIII transition metal halide and an alkyl metal compound selected from R'.sub.2 YNR.sub.2 and R'XYNR.sub.2, wherein Y is Al, Ga or In. The improved catalyst system provides increased polymerization activity without significantly affecting the crystallinity of the polymer.

Abstract: According to the present invention, there is provided a process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst consisting of a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing(1) a magnesium halide and/or a manganese halide,(2) an aromatic hydrocarbon,(3) a tetravalent titanium compound, and(4) a trivalent titanium compoundAnd in that said organometallic compound component is a mixture of(5) a trialkylaluminum and(6) a compound represented by the general formula AlR.sub.n X.sub.3-n wherein R is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and O<n<3.

Abstract: A method for the polymerization or copolymerization of .alpha.-olefin wherein .alpha.-olefin is polymerized or copolymerized in the presence of a catalyst essentially comprising a reformed titanium trichloride and an organoaluminum compound. The reformed titanium trichloride is prepared by simultaneously pulverizing an organoaluminum compound and a crystalline titanium trichloride compound, the latter comprising titanium trichloride and aluminum trichloride, treating the pulverized mixture with a solvent selected from aromatic hydrocarbons, aromatic hydrocarbon halides and organic ethers, separating the treated material from the solvent, and heating the separated material.

Abstract: A norbornene-type monomer is copolymerized with about 0% to about 95% by weight of dicyclopentadiene, based upon total polymer weight. The polymerization is conducted in the presence of (1) a catalyst comprising (a) at least one compound selected from the group consisting of dialkyl-aluminum iodides, alkylaluminum diodides and mixtures of trialkylaluminum compounds with iodine, (b) at least one dialkylaluminum chloride or alkylaluminum dichloride and (c) at least one monomer- or solvent-soluble tungsten compound, and (2) at least one nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom. Catalyst components (a) and (b) are charged before catalyst component (c). Use of a catalyst containing components (a), (b) and (c) produces easy-processing and substantially gel-free polymers, whereas a catalyst containing only (a) and (c) or only (b) and (c) produces heavily gelled polymers.

Abstract: According to the present invention, there is provided a process for preparing polyolefins by polymerizing or copolymerizing olefins in the presence of a catalyst consisting of a solid component and an organometallic compound component, characterized in that said solid component is obtained by copulverizing1. a magnesium halide,2. a compound represented by the general formula Al(OR)mX.sub.3-m wherein R is alkyl and/or aralkyl having 1 to 20 carbon atoms and may be the same or different, X is halogen and O<m.ltoreq.3,3. a tetravalent titanium compound, and4. a trivalent titanium compound and in that said organometallic compound component is a mixture of5. a trialkylaluminum and6. a compound represented by the general formula AlR'nX.sub.3-n wherein R' is alkyl having 1 to 10 carbon atoms and may be the same or different, X is halogen and O<n<3.

Abstract: Novel amorphous copolymers of mono-olefins or of mono-olefins and non-conjugated dienes with unsaturated derivatives of imides are disclosed. These copolymers containing from 99.9 to 80% by weight of non-polar units derived from at least two mono-olefins containing 2 to 18 carbon atoms, particularly ethylene and propene or ethylene and butene-1, and possibly one or more non-conjugated dienes, and from 0.1 to 20% units derived from an imide having the formula ##STR1## wherein Z is an alkenyl radical containing 2 to 16 carbon atoms, andA designates a saturated or unsaturated divalent hydrocarbon radical which contains 2 to 12 carbon atoms and which may possibly carry amino, halogeno or carboxyl groups.Some of said copolymers may be used as polymer additives in lubricating compounds to improve their viscosity index and to disperse the slurry which they may contain.

Abstract: Butene-1 optionally in the presence of up to 10% by weight of propene or like comonomer, is polymerized in excess butene-1 or liquid C.sub.4 fraction at 60.degree.-120.degree. C. to form a polybutene suitable for forming transparent films by employing as the polymerization catalyst (a) TiCl.sub.3 . nAlCl.sub.3 (n = 0.2 to 0.6) and (b) a mixture of 85 - 99.9 molar percent of dialkyl aluminum monochloride and 0.1 - 15 molar percent of trialkyl aluminum.

Abstract: Polyethylene or copolymers of ethylene with another .alpha.-olefin can be produced by the use of a novel polymerization catalyst obtained by using, in combination, (A) a specified, hydrocarbon-insoluble solid component prepared by reacting (i) a specific, hydrocarbon-soluble organoaluminum-magnesium complex (Al.sub.n Mg.sub.m R.sub.n(3.sub.-.sub..alpha.).sup.1 -R.sub.2m.sup.2 H.sub.n, wherein R.sup.1 and R.sup.2 are hydrocarbon radicals) with (ii) a titanium or vanadium compound containing halogen atom(s), and (B) an organoaluminum compound. This catalyst exhibits a surprisingly high activity per the unit amount of the solid component.

Abstract: The method of polymerizing olefins which includes the preparation of a pre-activated compound of a transition metal of IVa, Va and VIa of the periodic table of elements, in which the transition metal is at least partially in a reduced valency state, in which the pre-activation is carried out by contacting the transition metal compound with an organomagnesium compound and then polymerizing the olefins in the presence of the pre-activated transition metal compound and an organo-aluminum compound.

Abstract: Olefin polymerization catalysts are prepared by depositing a chromium compound and an aluminum compound on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree.C up to the decomposition temperature of the support material. The supported chromium and aluminum compound is then combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.

Abstract: Ultra high molecular weight, linear .alpha.-olefin polymers are produced without reactor fouling by polymerizing an .alpha.-olefin in the presence of Ziegler catalyst dispersed in an inert diluent and an amount of an inert gas not in excess of that which will dissolve in the inert liquid diluent.