Abstract: In a low pressure process for polymerizing ethene using a Ziegler mixed catalyst comprising (a) a titanium compound, a vanadium compound or a mixture thereof and (b) an aluminum-organic compound or a mixture thereof, an improvement is provided wherein the process is carried out in multi-stages comprising:polymerizing, in a first polymerization stage, in the liquid phase in a dispersion medium of a C.sub.3 - to C.sub.6 -hydrocarbon, andpolymerizing, in a last polymerization stage, in the gas phase.

Abstract: A process for preparing an extensively amorphous butene-1-propene-ethene terpolymer having a high softening point comprises low pressure solution polymerizing butene-1, propene and ethene by contacting these monomers with a catalytically effective amount of a mixed catalyst of a thermally unstable crystalline TiCl.sub.3 .multidot.0.30 to 0.35 AlCl.sub.3 and a trialkyl aluminum or dialkyl aluminum hydride, each having alkyl groups of 2-4 carbon atoms, the atomic ratio of Al:Ti being 0.8-4.0.

Abstract: As insulation for electric cables, there is provided an improved polyolefin having low shrinkage values, high elongation values, even after aging, the desired electrical insulation properties, and comprising partially crystalline, randomly copolymerized polypropylene having a proportion of ethylene, butene-1 and/or 1-hexene incorporated by polymerization of 1-6% by weight, a xylene-soluble proportion of 2-20% by weight, a viscosity value I of 200-400 cc./g., a melt flow index value (MFI.sub.190/5) of 1-20 g./10 min., and an elongation value of above 700%.

Abstract: A polybutene-1 mixture which forms heat sealable, transparent film having good initial tear resistance and resistance to tear propagation are produced by polymerizing liquid butene-1 at 60.degree.-120.degree. C. employing as catalyst a dihalidefree mixture of diethylaluminum monochloride and TiCl.sub.3.nAlCl.sub.3 wherein n is 0.2 to 0.6, and isolating the unfractionated mixture of polymers.

Abstract: Aqueous emulsions of olefin polymers and bitumen comprise:(a) 5-30% by weight of an extensively amorphous poly-.alpha.-olefin or poly-.alpha.-olefin mixture having viscosity numbers J of 5-400 cc./g. and ether-soluble proportions of more than 60%, wherein up to three quarters by weight of these polyolefins can be replaced by an elastomer;(b) 5-40% by weight of a hydrocarbon oil optionally containing a drying oil, wherein the hydrocarbon oil is a polybutene oil or the distillation residue form cyclododecatriene manufacture and/or a mixture of both;(c) 10-40% by weight of a bitumen;(d) 0-10% by weight of a chlorinated paraffin having a chlorine content of 45-60% and/or an aromatic bromine compound;(e) 0-20% by weight of a conventional additive;(f) 2-15% by weight of a surfactant; and(g) 15-78% by weight of water.

Abstract: High bulk density modification III of isotactic polybutene-1 is directly prepared by polymerizing butene-1 at 100.degree.-200.degree. C, preferably 140.degree.-160.degree. C., with a catalyst of: (a) titanium trichloride and (b) an alkyl aluminum compound.

Abstract: Polyolefin rubber compositions which are readily heat-sealable are provided by the addition of 5-100 parts by weight, based on the polyolefin elastomer, of a propylene polymer uniformly admixed therewith prior to vulcanization which is selected from the group consisting of polypropylene and copolymers of propylene with up to 20% by weight of ethylene, butene-1 or hexene-1 which polymer has a heptane-extractable portion of 5-60%, and I-value measured according to DIN 53 728 of 100-600 cm.sup.3 /g. and a yield point measured according to DIN 53 735 of 10-30 N/mm.sup.2.

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: Films, sheets, molded components and parts of other shaped articles formed from a plastomer or elastomer are bonded together or to a substrate employing as an adhesive an adhesive composition heated to 50.degree.-250.degree. C. and consisting essentially of:A. 5-95% by weight of solid or semi-solid atactic poly-.alpha.-olefin or mixture of poly-.alpha.-olefins having a reduced specific viscosity of 0.05-5.0 dl./g.;B. 95-5% by weight of liquid atactic polyolefin or mixture of polyolefins having a viscosity of 150-1,000,000 cp./20.degree. C.; andC. optionally, up to 50% by weight of filler.

Abstract: For preparing crystalline, thermoplastic, low-pressure terpolymers of ethene with 0.1-5 mol % butene-1 and 0.1-3 mol % butene-2 having a density of 0.94-0.96 g./cm.sup.3, a liquid phase monomer mixture consisting essentially of ethene, 0.05-10 mol % butene-1 and 20-98.9 mol % butene-2 is polymerized with a mixed polymerization catalyst comprising (a) TiCl.sub.3 . nAlCl.sub.3 wherein n is 0.2-0.6, and (b) isoprenylaluminum in a molar ratio Al : Ti of about 2-20 to form said terpolymer.

Abstract: Polypropylene can be polymerized with Ziegler-Natta TiCl.sub.3 or TiCl.sub.3 . (AlCl.sub.3).sub.0.2.sub.-0.6 plus chlorine containing organoaluminum compound mixed catalyst using butene-2 or a C.sub.4 -cut comprising butene-2 as the polymerization solvent without the formation of propylene-butene copolymers.

Abstract: High molecular weight, low density copolymers of ethylene and propylene and/or butene-1 are prepared by a low pressure liquid phase polymerization process using a titanium halide - organoaluminum catalyst in a polymerization solvent containing butene-2. Consistently comparable ethylene copolymers can be obtained from monomer mixtures of varying composition.

Abstract: In a low pressure process for the production of crystalline propene-ethene-butene-1 terpolymers with 0.2 to 10% by weight of ethene and 0.2 to 5% by weight of butene-1 with the aid of mixed catalysts of TiCl.sub.3 or TiCl.sub.3 .sup.. n AlCl.sub.3 (n = 0.2 to 0.6), and chlorine-containing organoaluminum compounds, the improvement comprising conducting the polymerization in butene-2 or in a C.sub.4 -cut containing 20-99% butene-2, containing 0.1 - 2.5% of butene-1, with the addition of 0.2 to 10% of ethene, based on the amount of propene employed.