Abstract: Conjugated dienes and alpha-olefins, such as butadiene and propylene, are copolymerized by a catalyst system comprising a metal component TiCl.sub.n Br.sub.4-n or VCl.sub.m Br.sub.5-m, a reducing agent of the formula AlR.sub.2 H wherein R is hydrogen or a hydrocarbon group, there being at least one hydrocarbon group per molecule, and a carbonyl-containing compound such as acetophenone. The use of the aluminum hydride compound allows the use of higher and more practical temperatures to obtain desirable molecular weights, yields and microstructure that with aluminum trialkyls require much lower and less practical polymerization temperatures.

Abstract: 1,3-Butadiene is polymerized in the liquid phase in the presence of a catalyst composition comprising:A. A complex of a cobalt salt;B. AlR.sub.3 wherein R is hydrocarbon, andC. CS.sub.2.The complex comprises one of a cobalt salt, preferably CoCl.sub.2, with an organic compound containing nitrogen and oxygen or sulfur, preferably with no more than 2 carbon atoms separating the nitrogen and oxygen or sulfur, and the organometal reducing agent AlR.sub.3, wherein R is a hydrocarbon radical, preferably of no more than 10 carbon atoms. The polybutadiene has a microstructure of at least 80% and generally more than 90% 1,2, is also syndiotactic in character, has a melting point of 190.degree.-227.degree. C, and may be obtained in approximately quantitative yields.

Abstract: Sulfur vulcanizable elastomers comprise interpolymers of a major proportion of (a) one or more olefinic or haloolefinic hydrocarbons; (b) one or more esters of acrylic acid in which the acyclic or alicyclic radical moiety of the ester is free of olefinic unsaturation; and (c) a minor proportion, of about 0.10 to 10 mol percent of the total monomers present in the interpolymer, of an acyclic conjugated diolefin, prepared with a catalyst system comprising a Lewis acid, a vanadium compound and a source of free-radicals such as an organic peroxide. The polymer chain consists of segments of alternating olefin and acrylic ester monomer units of variable length interconnected by randomly distributed diolefin units and the sum of the olefin and diolefin monomers in moles is substantially equal to the sum of the acrylic esters in moles present in the interpolymer.

Abstract: Method of polymerizing conjugated diolefinic monomers containing from 4 to about 12 carbon atoms to high molecular weight polymers by bringing said monomers into contact with a catalyst system consisting of (1) an iron-containing compound, (2) an organometallic reducing agent from Groups I and III of the Periodic Table, and (3) a nitrogen-containing ligand.

Abstract: An improved process for the polymerization of olefins in the presence of catalyst consisting essentially of:A. a titanium trichloride composition obtained by micro-pulverizing a titanium trichloride component prepared by reduction of titanium tetrachloride with a member selected from the group consisting of hydrogen, silicon, metallic titanium and metallic aluminum, in the presence of a complex of aluminum chloride or aluminum bromide with an electron-donor selected from the group consisting of oxygen-containing organic compounds, nitrogen-containing organic compounds and phosphorus-containing organic compounds, the amount of the complex being 0.005 to 0.5 mole per mole of the titanium trichloride component, and extracting the micro-pulverized titanium trichloride component with a solvent selected from the group consisting of saturated aliphatic hydrocarbons, aromatic hydrocarbons and halogenated aromatic hydrocarbons; andB. an organoaluminum compound, and the catalyst therefor.

Abstract: A process of producing a high molecular weight alkenylphenol polymer which comprises cationically polymerizing an alkenylphenol, such as vinylphenol, in the presence of a nitrile using a cationic polymerization initiator in a homogeneous reaction system. The resulting alkenylphenol polymer is useful as a starting material for preparing a thermosetting resin, a high molecular weight electrolytic substance, an ion exchange membrane, adhesives, glass-fiber-reinforced composite materials, etc.

Abstract: An adduct of a fulvene and unsaturated silane produced in a Diels-Alder reaction and the interpolymerization of the adduct with ethylene, with or without propylene, with or without a polyene, in the preparation of ethylene interpolymers.

Abstract: Disubstituted heterocyclic amine oxides substituted alpha, alpha' to the N atom have been found to markedly reduce production of alkane-soluble components formed during the polymerization of propylene and its mixtures with titanium chloride-organoaluminum catalyst.

Abstract: The physical properties of rubbery polymers of conjugated dienes are modified by treatment with a homogeneous olefin disproportionation catalyst thereby modifying at least one of the properties of cold flow, inherent viscosity or Mooney viscosity.

Abstract: A new catalyst component and its use with an organoaluminum compound, which component is a brown solid of high surface area and large pore volume comprising beta titanium trichloride and a small amount of an organic electron pair donor compound. This solid when used in conjunction with an organoaluminum compound to polymerize alpha-olefins produces product polymer at substantially increased rates and yields compared to present commercial, purple titanium trichloride while coproducing reduced amounts of low-molecular-weight and, particularly, amorphous polymer. Combinations of this new catalyst component and an organoaluminum compound can be further improved in their catalytic properties by addition of small amounts of modifiers, alone and in combination. Such combinations with or without modifiers show good sensitivity to hydrogen used as a molecular weight controlling agent. The combinations are useful for slurry, bulk and vapor phase polymerization of alpha-olefins such as propylene.

Abstract: A process for preparing a solid catalyst for the polymerization of olefins which comprises the steps of (1) reducing titanium tetrachloride with an organoaluminum compound, (2) treating the resulting .beta.-type titanium trichloride with a complexing agent, (3) treating the solid catalyst thus obtained with an organoaluminum compound, and (4) treating the resulting solid catalyst with a complexing agent, and a solid catalyst for the polymerization of olefins prepared by the above process.