Abstract: A process for producing dispersible powders by spray-drying aqueous polymer dispersions and adding antiblocking agent, wherein antiblocking agents present in agglomerated form and having a particle size from 10 ?m to 250 ?m, or having a particle size from 5 mm to 5 cm in the case of agglomerates in the form of extrudates, are fed in whole or in part by a transport gas into the spray-drying device and are comminuted to a particle size from 0.01 ?m to 5 ?m, or, in the case of extrudates, to a particle size from 2 ?m to 60 ?m.

Abstract: The present invention relates to a method for packing polysilicon in the form of chunks by introducing the chunks into a first plastic bag, the first plastic bag being introduced into a second plastic bag after the introduction of the chunks, or the first plastic bag already having been inserted into the second plastic bag prior to the introduction of the chunks into the first plastic bag, as a result of which the chunks are present in a double bag which is sealed, wherein the air present in the two plastic bags in the double bag after the introduction of the chunks is removed before the sealing of the double bag such that the total volume of the double bag relative to the volume of the chunks is 2.4 to 3.0.

Abstract: The invention relates to a novel cosmetic composition, containing, in a cosmetically acceptable medium, at least one hair conditioning agent and at least one aqueous dispersion of pre-cross-linked organopolysiloxanes composed of units of general formula (I), wherein R means a monovalent, saturated or unsaturated hydrocarbon group having 1 to 200 carbon atoms per group, which hydrocarbon group can contain one or more heteroatoms from the group N, P, S, O, and halogen, R1 means a hydrogen atom or an alkyl group having 1 to 8 carbon atoms per group, R2 means a monovalent, optionally substituted hydrocarbon group having 1 to 18 carbon atoms per group, AKT is a group of the formula —CH2NHR4, —CH2NR42, or formula (II), wherein R4 means a monovalent hydrocarbon group having 1 to 18 carbon atoms, which hydrocarbon group can contain one or more heteroatoms from the group N and O, and R5 means a divalent hydrocarbon group having 3 to 12 carbon atoms, which hydrocarbon group can contain one or more heteroatoms from the

Abstract: Composite materials contain a silicone addition crosslinkable silicone elastomer composition comprising an organopolysiloxane having aliphatic unsaturation, an Si—H functional cyclic organopolysiloxane, a hydrosilylation catalyst, together with specific adhesion promoters, applied to a substrate material.

Abstract: Silicone resins with a weight average molecular weight of at least 5000 g/mol and polydispersity of ?65 are prepared by hydrolyzing and condensing: (A) silicon-bonded alkoxylated and optionally hydroxylated silicone resin intermediate(s), (C) a basic or acidic catalyst or mixture thereof which is not completely self-neutralizing, (D) water, and (E) in the presence of an aliphatic carboxylic ester as the sole process solvent, with the provisos that I) alcohol eliminated in the reaction is removed from the reaction mixture by distillation, II) the catalyst (C) is deactivated by thermal treatment or neutralization, and III) a portion of (E) remains in the final product.

Abstract: Polycrystalline silicon of the invention contains: (a) polycrystalline silicon fragments, wherein at least 90% of the fragments have a size from 10 to 40 mm, (b) <15 ppmw of silicon dust particles having particle sizes <400 ?m; (c) <14 ppmw of silicon dust particles having particle sizes <50 ?m; (d) <10 ppmw of silicon dust particles having particle sizes <10 ?m; (e) <3 ppmw of silicon dust particles having particle sizes <1 ?m; and (f) surface metal impurities in an amount ?0.1 ppbw and ?100 ppbw. A polycrystalline silicon production method of the invention includes fracturing polycrystalline silicon deposited on thin rods in a Siemens reactor into fragments; classifying the fragments by size; and treating the fragments with compressed air or dry ice to remove silicon dust from the fragments without wet chemical cleaning.

Abstract: Organosilanolate powders having a low cation to silicon ratio provide superior hydrophobing ability. The powders may be prepared on an industrial scale by hydrolysis of a silane with a basic salt solution, adding an inert organic solvent, and removing gaseous or alcoholic hydrolysis products by evaporation or distillation, precipitating the organosilanolate as a fine powder.

Abstract: Cyclic siloxanes are separated from short chain hydroxyl-terminated siloxanes by contact with steam at at least 650 hPa absolute. The cyclic siloxanes and other components which are separated by use of steam can be recovered by phase separation, and preferably used in other processes.

Abstract: Moisture curable adhesives of high tensile shear strength contain an alkoxysilyl-terminated polymer and an alkoxy-functional silicone resin.

Abstract: A bag contains polysilicon, has been welded and includes at least one weld seam and a polyethylene film having: a thickness of 150-900 ?m; a stiffness at a flexural modulus Fmax of 300-2000 mN and Ft of 100-1300 mN; a fracture force F determined by dynamic penetration testing of 200-1500 N; a fracture energy Ws of 2-30 J; a penetration energy Wtot of 2.2-30 J; a film tensile stress at 15% longitudinal and transverse elongation of 9-50 MPa; an Elmendorf longitudinal film tear resistance of 10-60 cN; an Elmendorf transverse film tear resistance of 18-60 cN; a longitudinal film elongation at break of 300-2000%; a transverse film elongation at break of 450-3000%; and a weld seam strength of 25-150 N/15 mm. A method includes filling a bag with polysilicon, and welding by pulse sealing with contact pressure greater than 0.01 N/mm2 to obtain a 25-150 N/15 mm weld seam strength.

Abstract: A temporary adhesive for reversibly bonding a silicon wafer to a silicon support contains a crosslinkable organopolysiloxanes composition and a fatty acid or salt thereof or fatty acid ester as a release regulator having a density different from the crosslinkable organopolysiloxanes composition of at least 0.1 g/cm3, which upon parting of the wafer from the substrate, the adhesive remains substantially adhered to the substrate.

Abstract: Readily emulsifyable silicone copolymers containing urethanesulfonamido linking groups are prepared by reacting a hydroxyl-functional organic polymer with a halo- or pseudohalo-sulfonyl isocyanate, and then reacting the halo- or pseudohalo-sulfonyl product with an organopolysiloxane bearing aminoalkyl groups, preferably in stoichiometric excess.

Abstract: Storage stable polyorganosiloxane-silicone resin mixtures contain: 1) 100 parts by weight of one or more liquid aminoalkyl-containing polyorganosiloxanes containing at least 80 mol % of units selected from units of the formulae Ia, Ib, II and III R12SiO(4-a-b)/2??(Ia), R1aR2bSiO(4-a-b)/2??(Ib), R33SiO(1/2)??(II), R32R4SiO(1/2)??(III), wherein, in the polydimethylsiloxanes, the average ratio of the sum of units of the formulae Ia and Ib to the sum of units of the formulae II and III is in the range from 0.5 to 500, the average ratio of units II to III in the range of 1.86 to 100, and the polydimethylsiloxanes have an average amine number of ?0.01 mequiv/g, 2) at least 1 part by weight of one or more silicone resins, and 3) at most 5 parts by weight of water.

Abstract: A method for the production of natural L-cysteine by fermentation in a production fermenter in which a microorganism strain is cultured in a fermentation medium, characterized in that the fraction of the compounds L-cysteine, L-cystine and thiazolidine in the fermentation medium is controlled in a targeted manner by an iron concentration of a maximum of 8 mg/l in the fermentation medium.

Abstract: Aqueous emulsions of high viscosity organopolysiloxanes can be prepared having a very low content of cyclic siloxanes by condensing low molecular weight alkoxy-functional organopolysiloxanes in aqueous emulsion with an alkylphosphate emulsifier and at least one selected polyoxyethylene non-ionic surfactant.

Abstract: A composition comprising a phosphonitrile halide and an oligomeric organopolysiloxanes having from 10 to 50 Si units is effective to remove silicone residues from substrates with minimal swelling of thin polymer substrates.

Abstract: The invention relates to a process for packaging polycrystalline silicon in the form of chunks, including the following steps: (a) providing polycrystalline silicon in a metering system; (b) filling polycrystalline silicon from the metering system, which removes fines by use of screening, into a plastic bag arranged below the metering system. The weight of the plastic bag with the polycrystalline silicon introduced is determined during the filling step and the filling step is ended after the attainment of a target weight. A fall height of the polycrystalline silicon from the metering system into the plastic bag is kept at less than 450 mm by use of at least one clamp apparatus over the entire filling step.

Abstract: High-purity polysilicon granules are prepared by depositing reaction gas on silicon granules in a fluidized bed reactor having: a reactor space comprising at least two zones lying one above the other, the lower zone weakly fluidized by introduction of a silicon-free gas into silicon granules in the lower zone by a plurality of individual dilution gas nozzles, and a second, reaction zone directly abutting the lower zone, the reaction zone heated via its outwardly bounding wall, introducing silicon-containing reaction gas as a vertical high speed gas jet into the reaction zone by reaction gas nozzle(s), forming local reaction gas jets surrounded by bubble-forming fluidized bed, gas decomposing leading to particle growth, wherein the reaction gas has fully or almost fully reacted to chemical equilibrium conversion before reaching the wall or bed surface.

Abstract: ?-ketocarbonylquats contain at least one quaternary ammonium salt group, and may be prepared by the reaction of an alkyl ketene dimer with a tertiary amine group-containing compound also containing a protic group, followed by quaternization.

Abstract: The invention provides hydraulically setting sealing composition based on a) a hydraulically setting compound out of the group comprising high-alumina cement, ordinary portland cement, blast furnace slag, b) protective-colloide stabilized polymer of one or more ethylenically unsaturated monomers in form of an aqueous polymer dispersion or a water-redispersible polymer powder, and c) one or more fillers.