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 the preparation of a catalyst for the polymerization and copolymerization of cyclic olefins which have 4, 5, 7 or more ring carbon atoms and at least one olefinic double bond in the ring, fromA. at least one halide or oxyhalide of molybdenum, preferably with molybdenum in the oxidation state +5,B. at least one 2-halo alcohol andC. at least one aluminium compound in the molar ratio of a : b = 1 : 1 to 1 : 10 and a : c = 1 : 0.5 to 1 : 30,Characterized in that the molybdenum halide or oxyhalide and the 2-halo alcohol are reacted with the exclusion of solvents or in the presence of chlorinated solvents which are inert towards the molybdenum salt and in which the molybdenum salt is soluble to an extent of at least 0.01 molar, and the aluminium alkyl compound is added, optionally in the presence of the monomers.

Abstract: The instant invention relates to graft polymers of vinyl phosphonic acid esters, optionally together with nitrogen-containing polymerizable vinyl compounds, on polyalkylene glycols and to a process for their production. The polymers so produced necessarily contain phosphorus and, optionally, nitrogen in the molecule. The polymers are rendered flameproof by the phosphorus and, in addition, self-extinguishing by the nitrogen.

Abstract: Catalysts obtained fromA. a reaction product of 1 mol tungsten hexachloride with from 1 to 4 mols of a mixture of 2-chloroethanol and 2,2,2-trichloroethanol in a molar ratio of from 1 : 3 to 3 : 1; andB. from 1 to 20 mol, per mol of tungsten in component (A), of an organometallic aluminium for disproportionation and metathesis of olefin and for ring opening polymerization of cyclic olefins.

Abstract: A stable oil-in-water emulsion wherein the discontinuous phase comprises a water-immiscible organic liquid, said emulsion being stabilized by from 0.02 to 5% by weight, based on the weight of organic solvent present, of a laminator, said laminator being a linear high molecular weight polymer whose dilute aqueous solutions having a concentration of up to 0.05% by weight, lower the resistance index in turbulent flow by at least 10% without promoting any change in viscosity.

Abstract: Catalysts obtained fromA. a reaction product of 1 mol tungsten hexachloride with from 1 to 4 mols of a mixture of 2-chloroethanol and 2,2,2-trichloroethanol in a molar ratio of from 1 : 3 to 3 : 1; andB. from 1 to 20 mol, per mol of tungsten in component (A), of an organometallic aluminium for disproportionation and metathesis of olefin and for ring opening polymerizaton of cyclic olefins.

Abstract: A non-discoloring stabilizer system for trans-polypentenamer of:A. a sulphur-containing phenol of the formula: ##SPC1##In which R.sub.1 and R.sub.3 are alkyl groups with 1 to 8 carbon atoms, aralkyl radicals with 7 to 9 carbon atoms and cycloalkyl radicals with 5 to 7 carbon atoms, R.sub.3 represents hydrogen, alkyl groups with 1 to 8 carbon atoms, cyclohexyl, cyclohexenyl or methylcyclohexenyl, R.sub.4 represents alkyl groups with 1 to 12 carbon atoms or ##SPC2##Where R.sub.1, R.sub.2 and R.sub.3 are as defined above, andB. a phenol ester of phosphorous acid of the formula: ##SPC3##In which R.sub.5 represents an alkyl or cycloalkyl group with 5 to 10 carbon atoms, R.sub.6 and R.sub.7 are the same or different and represent hydrogen, alkyl and cycloalkyl radicals each with 1 to 7 carbon atoms.

Abstract: A process for manufacturing polycarbonate powder wherein a solution of polycarbonate in a water-immiscible solvent is emulsified in water which contains a very small amount of a laminator. The solvent is thereafter removed from the emulsion to form a dispersion of the polycarbonate powder. The polycarbonate powder settles out of the dispersion and is removed.

Abstract: Ring opening polymerisation of cyclooctadiene-(1,5) (COD) optionally in an inert organic solvent on a catalyst ofA. a tungsten salt,B. a halogenated alcohol in which the halogen and OH group are attached to adjacent carbon atoms, and/or an epoxide and/or a halogenated phenol, andC. an organo aluminium compound and/or an aluminium halide.