Abstract: The invention relates to compositions which can be prepared from at least one polyorganosiloxane, boric acid and water, and which may serve as a pelletizing additive for crosslinkable silicone rubber formulations. A small proportion of the pelletizing additive, when added to a ore component crosslinkable silicone rubber, or to individual components of a two or more component silicone rubber formulation, allow production of free flowing pellets which retain storage stability for extended periods of time.

Abstract: Radiation-curable compositions containing linear organopolysiloxanes bearing (meth)acryloxy groups and a photosensitizer are useful for release coatings particularly release coatings with enhanced adhesion to the substrate onto which they are coated, for example those used for adhesives such as pressure sensitive adhesive labels.

Abstract: Compositions prepared by mixing

Abstract: The invention concerns a dispersion powder composition which is redispersible in water and is made from water-insoluble organic polymers, the composition being characterized in that it contains 0.1 to 30% by wt., relative to the weight of the organic polymers, of one or more silicon compounds which are dispersible in water and which have a boiling point at normal pressure of 160 degrees C., selected from the group comprising the silanes, polysilanes, oligosiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes and polysilylenedisiloxanes. The invention also concerns methods for manufacturing such compounds and their use.

Abstract: The invention relates to a process for preparing an aqueous polymer dispersion for removable pressure-sensitive adhesive films by means of free-radically initiated aqueous emulsion polymerization of one or more ethylenically unsaturated monomers from the group consisting of esters of acrylic acid and methacrylic acid with branched or unbranched alcohols having 1 to 12 carbon atoms, vinyl esters of branched or unbranched carboxylic acids having 1 to 12 carbon atoms, vinyl-aromatics, vinyl halides, olefins and dienes, which comprises copolymerizing from 0.01 to 2.0% by weight of polar, ionic or nonionic comonomers or mixtures thereof, and if polar ionic comonomers, alone or in a mixture, are copolymerized, the proportion thereof is not more than 1.0% by weight, and the amounts in % by weight are based in each case on the overall weight of the comonomers.

Abstract: A gastight shut-off device (1) which can be fitted between a supply pipeline (2) and a discharge pipeline (3), in the form of a ball valve, includes a housing (4), a housing flow passage with an inlet section (5) and an outlet section (6), a shut-off ball (7) with a shut-off ball flow passage (8), the shut-off ball (7) being mounted in the housing (4), if appropriate by means of two sealing rings (9, 10), and an actuating drive (11) for the shut-off ball (7); and inlet section (5) is designed in such a manner that it reaches into the shut-off ball flow passage (8), which is designed in such a manner that, in the event of the ball valve closing through rotation of the shut-off ball (7), that part of the inlet section (5) which reaches into the shut-off ball flow passage (8) is accommodated in a slot in the shut-off ball.

Abstract: Process is for environmentally friendly, low-waste reprocessing of side dams for the continuous casting of thin steel strip having a mechanically or chemically worn surface. The mechanically or chemically worn surface of the side dams is cleaned by methods known per se and the side dams are subsequently converted into a BN-containing powder by crushing and milling.

Abstract: The invention relates to a ceramic flash TV evaporator for the evaporation coating of picture tubes with aluminum, containing a cavity whose width tapers in cross section through the evaporator from the upper edge of the evaporator to the lower edge of the evaporator, which is defined by the fact that the transition of the side walls of the evaporator to the underside of the evaporator is elliptically rounded in cross section at least over part of the longitudinal axis of the evaporator.

Abstract: Shaped body based on polycrystalline SiC and having a density of greater than 90% of its theoretical density and graphite layer on its surface, wherein the graphite layer is crystalline, has a thickness of 0.1-100 &mgr;m and has been produced by thermal surface decomposition of the SiC after it has been sintered to closed porosity.

Abstract: The invention provides a process for preparing adhesives having improved adhesion, in the form of their aqueous dispersions or water-redispersible dispersion powders, by emulsion polymerization in the presence of polyvinyl alcohol with or without drying of the dispersion obtainable by this process, which comprises polymerizing a comonomer mixture comprising

Abstract: The invention provides a process for heterophase reactions in a liquid or supercritical dispersion medium, in which the starting materials are introduced into the reaction zone of a reactor provided with one or more enrichment zones and the reaction product or unreacted starting material or both starting material and reaction product are discharged via one enrichment zone in each case, wherein a) the reaction product together with the dispersion medium is discharged from the reactor via an enrichment zone, the reaction product is separated off and the dispersion medium is, if desired in countercurrent to the reaction product/dispersion medium mixture and via an enrichment zone, returned to the reaction zone, or b) unreacted starting material together with the dispersion medium is discharged, the starting material is separated from the dispersion medium and returned directly to the reaction zone and the dispersion medium is, if desired, in countercurrent to the reaction product/dispersion medium mixture and vi

Abstract: A composition which is useful for producing profiles and cable insulation which retain their function in the event of fire, comprise peroxidically crosslinking or condensation-crosslinking silicone rubber, metal oxides selected from magnesium oxide, aluminum oxide, tin oxide, calcium oxide and barium oxide and metal compounds of this class which produce oxides on heating, boric acid, zinc borate, and a platinum complex having at least one unsaturated group.

Abstract: The present invention provides polishes for surfaces, comprising aminoorganopolysiloxanes (A) which are solid at room temperature, contain fluoro groups and are able to change their aggregate state reversibly as a result of changes in temperature.

Abstract: Applicants herewith submit an Abstract on a separate sheet of paper numbered Page 28.

Abstract: A method for conveying silicon fragments has the silicon fragments being conveyed over a conveyor surface, which is made from hyperpure silicon. There is a vibrating conveyor, and during the conveying, the sharp edges of the silicon fragments are rounded and mechanical-physical decontamination takes place. The vibrating conveyor has a conveyor surface which is made from hyperpure silicon. A second vibrating conveyor unit has a conveyor surface which is made from hyperpure silicon and has passage openings therethrough.

Abstract: A thickener based vinyl alcohol copolymers and cellulose ethers, containing

Abstract: The invention relates to thickeners based on fully or partially hydrolyzed vinyl alcohol copolymers with a molecular weight Mw greater than 100,000, obtainable by hydrolyzing vinyl acetate copolymers which, besides vinyl acetate units, also contain comonomer units which derive from one or more comonomers selected from the group consisting of 1-(C1-5)-alkylvinyl esters of C1-5 carboxylic acids, allyl esters, vinyl esters of alpha-branched C5-12 carboxylic acids, and C1-18-alkyl (meth)acrylates, in the form of their aqueous solution or in powder form.

Abstract: The invention relates to a process for consolidating and hydrophobicizing soil materials of clay type or of siliceous type, using alkali metal silicates and alkali metal siliconates.

Abstract: The invention relates to the use of acetalized vinyl alcohol polymers with a molecular weight Mw greater than 100 000 as thickeners, the thickeners being obtained by acetalizing partially or fully hydrolyzed vinyl acetate homopolymers, or partially or fully hydrolyzed vinyl acetate copolymers which, besides vinyl acetate units, also contain comonomer units which derive from one or more comonomers selected from the group consisting of 1-(C1-5) alkylvinyl esters of C1-5 carboxylic acids, allyl esters, vinyl esters of alpha-branched C1-12 carboxylic acids, and C1-8-alkyl (meth)acrylates.

Abstract: Organopolysiloxane compositions prepared from an organopolysiloxane and a crosslinking agent comprising bis-4-methylbenzoyl peroxide (PMBP) and at least one compound from the group consisting of benzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-hexane-2,5-di-tert-butyl peroxide (DHBP) and di-tert-butyl peroxide exhibit less tendency to yellow upon vulcanization, and can produce tear resistant, substantially odor free vulcanizates.