Abstract: The invention relates to a method for producing polyfluoroanthenes containing repeat units of general formula (I), said method consisting of the following steps: a) a monomer fluoroanthene derivative of formula IIa is produced; b) optionally the monomer fluoroanthene derivative of formula IIa is converted into another monomer fluoroanthene derivative of formula IIb; and c) the monomer fluoroanthene derivative of formula IIa or IIb is polymerised, optionally together with at least one other comonomer. The invention also relates to polyfluoroanthenes that can be produced according to the inventive method, films, a light-emitting layer containing or consisting of at least one inventive polyfluoroanthene, OLEDs containing at least one inventive polyfluoroanthene, OLEDs containing an inventive light-emitting layer, a device containing an inventive OLED, and the use of the inventive polyfluoroanthene emitter substances in OLEDs.

Abstract: A substituted fluoranthene, a light emitting layer including the substituted fluoranthene, a diode including the substituted fluoranthene, and a visual display unit including the substituted fluoranthene.

Abstract: The present invention relates to a process for preparing propylene polymer compositions in at least two-stage process wherein, in a first stage, a propylene homopolymer or a propylene copolymer comprising propylene and at least a CZ-CIO-1-alkenes other than propylene, containing at least 85% by weight of propylene, is prepared by polymerization and, in a second stage, ethylene and at least a comonomer selected from propylene and C4-C,o1alkenes are polymerized to give an ethylene polymer, comprising at least 90% by weight of ethylene, wherein the amount of the ethylene polymer in the propylene polymer composition ranges from 10 to 50% by weight and the propylene polymer composition has a melt flow rate MFR, in accordance with ISO 1133 at 230° C. and 2.16 kg, of from 2 to 50 g/10 min.

Abstract: The invention relates to fluoranthene derivatives of the general formula (I) in which R1, R2, R3 and a are each defined according to the description, with the proviso that at least one of the R1 or R2 radicals is not hydrogen, to processes for their preparation and to the use of the fluoranthene derivatives as emitter molecules in organic light-emitting diodes (OLEDs), to a light-emitting layer comprising the inventive fluoranthene derivatives as emitter molecules, to an OLED comprising the inventive light-emitting layer and to devices comprising the inventive OLED.

Abstract: The present invention relates to a new solid catalytic component, which can be used in combination with an aluminum compound as co-catalyst and optionally an external electron donor as additional co-catalyst to form a catalytic system of the Ziegler-Natta-catalyst-type. The solid catalytic system comprises titanium or vanadium compound, a compound of magnesium containing at least one halogen, a particulate porous support, and optionally an internal electron donor.

Abstract: The invention relates to highly flowable propylene block copolymers that comprise 50 to 80 wt.-% of a propylene homopolymer and 10 to 70 wt.-% of a propylene copolymer having 5 to 50 wt.-% of a C2–C8 alk-1-ene polymerized into it that is different from propylene, and that are obtainable from the gaseous phase by a two-step polymerization by means of a Ziegler-Natta catalyst system. In a first polymerization step, the propylene is polymerized at a pressure of 10 to 50 bar, a temperature of 50 to 100° C. and an average dwelling time of the reaction mixture of 0.3 to 5 hours in the presence of at least 2.0% by volume, based on the total volume, of hydrogen. The propylene homopolymer obtained in said first polymerization step is transferred together with the Ziegler-Natta catalyst system into an intermediate container, expanded for 0.01 to 5 minutes to less than 5 bar and maintained at a temperature of 10 to 80° C.

Abstract: Propylene homopolymers, wherein, in their separation according to tacticity by first dissolving the polymers in boiling xylene, then cooling the solution to 25° C. at a cooling rate of 10° C./h and then, with ascending temperature, separating the propylene homopolymers into fractions of different tacticity, either one or more of the conditions that i) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 112° C. is greater than 20% by weight or ii) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 117° C. is greater than 8% by weight or iii) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 122° C. is greater than 1% by weight, are satisfied.

Abstract: The present invention relates to a process for preparing propylene polymer compositions in in at least two-stage process wherein, in a first stage, a propylene homopolymer or a propylene copolymer comprising propylene and at least a CZ-CIO-1-alkenes other than propylene, containing at least 85% by weight of propylene, is prepared by polymerization and, in a second stage, ethylene and at least a comonomer selected from propylene and C4-C,o1alkenes are polymerized to give an ethylene polymer, comprising at least 90% by weight of ethylene, wherein the amount of the ethylene polymer in the propylene polymer composition ranges from 10 to 50% by weight and the propylene polymer composition has a melt flow rate MFR, in accordance with ISO 1133 at 230° C. and 2.16 kg, of from 2 to 50 g/10 min.

Abstract: A catalyst solid for olefin polymerization comprising A) at least one magnesium halide, B) at least one metallocene complex and C) at least one compound capable of forming metallocenium ions, is prepared by i) firstly preparing finely divided support particles consisting of the magnesium halide A) and an C1-C8-alcohol having a mean particle diameter of from 1 to 200 ?m from an adduct of the magnesium halide A) and a C1-C8-alcohol, where the adduct contains from 1.5 to 5 mol of the C1-C8-alcohol per mole of magnesium halide, ii) then depositing the compound C) capable of forming metallocenium ions on the finely divided support particles and iii) subsequently bringing the reaction product hereby obtained into contact with the metallocene complex B). This catalyst solid can be used for the polymerization or copolymerization of olefins.

Abstract: In a process for preparing a metal-containing supported catalyst or a metal-containing supported catalyst component by impregnation of a support material with an impregnation solution comprising the metal component, the impregnation solution flows through the support material.

Abstract: The invention relates to a method for producing a supported catalyst which contains metal, or a supported catalyst constituent which contains metal by impregnating a supporting material with an impregnating solution containing the metal constituent, whereby the impregnating solution flows through the supporting material.

Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituents a) a solid component comprising a compound of titanium or vanadium, a compound of magnesium, a particulate inorganic oxide as support and an internal electron donor compound, and as cocatalyst b) an aluminum compound and c) if desired, a further, external electron donor compound, wherein the particulate, inorganic oxide used has a specific surface area of from 350 to 1000 m2/g and a mean particle diameter {overscore (D)} in the range from 5 to 60 &mgr;m and comprises particles which are composed of primary particles having a mean particle diameter {overscore (d)} in the range from 1 to 10 &mgr;m and contain voids or channels between the primary particles, where the macroscopic proportion of voids or channels having a diameter of greater than 1 &mgr;m in the particles of the inorganic oxides is in the range from 5 to 30% by volume and the molar ratio of the compound of magnesium to the particulate, inorganic oxide is from 0.

Abstract: Propylene polymers containing a matrix of a propylene homopolymer and a copolymer of propylene and other alkenes, wherein, during the separation of the propylene polymers according to tacticity and comonomer distribution of the polymer chains, by first dissolving the propylene polymers in boiling xylene, then cooling the solution at a cooling rate of 10° C./h to 25° C. and thereafter, increasing the temperature, separating the propylene polymers into fractions of different solubility, either one or more of the conditions that i) more than 20% by weight of the matrix remain undissolved on further heating to 112° C. or ii) more than 8% by weight of the matrix remain undissolved on further heating to 117° C. or iii) more than 1% by weight of the matrix remain undissolved on further heating to 122° C. are fulfilled by the matrix which remains undissolved on heating the cooled propylene polymer solution to 80° C.

Abstract: Aqueous solutions or aqueous emulsions of copolymers are obtainable by copolymerization of (a) from 20 to 95 mol % of at least one monoethylenically unsaturated C4-C12-dicarboxylic acid or the anhydride thereof with (b) from 5 to 80 mol % of at least one branched oligomer or polymer which has a vinyl, vinylidene or alkylvinylene terminal group and is of at least 9 carbon atoms and (c) from 0 to 50 mol % of at least one further monoethylenically unsaturated compound which is copolymerizable with the monomers (a) and (b) and contain from 0.5 to 70% by weight, based on the total amount of the solutions or emulsions, of these copolymers. These copolymer solutions or emulsions are suitable as leather assistants and as dispersants for pigments.

Abstract: The present invention is a process of preparing copolymers of vinyl aromatic and olefinic monomers wherein the polymerization is carried out in a dispersion in the presence of a metallocene catalyst and a dispersion aid. The dispersion aid is a styrene-diene two-block copolymer or a styrene-diene three-block copolymer. The resultant polymer is useful as a fiber, film or molding.

Abstract: The invention relates to water-dilutable binders which can be prepared by subjecting (A) from 20 to 90% by weight of a mixture of (a1) from 3 to 50% by weight of acrylic acid, methacrylic acid or of a mixture of acrylic acid and methacrylic acid, and (a2) from 50 to 97% by weight of an ethylenically unsaturated monomer or of a mixture of ethylenically unsaturated monomers to free-radical polymerization in the presence of (B) from 9.9 to 79.9% by weight of a halogen-free copolymer composed of (b1) from 1 to 99, preferably from 50 to 90% by weight, of propylene, (b2) from 1 to 99, preferably from 10 to 50% by weight, of at least one olefin which is copolymerizable with (b1) and contains per molecule from five to twenty, preferably from six to eight, carbon atoms, with the exception of isoprene, and (b3) from 0 to 50, preferably from 0 to 25% by weight, of ethylene and/or butylene, or of a mixture of such copolymers, and (C) from 0.